+/*
+ * ia32rtools
+ * (C) notaz, 2013-2015
+ *
+ * This work is licensed under the terms of 3-clause BSD license.
+ * See COPYING file in the top-level directory.
+ */
+
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include "my_assert.h"
#include "my_str.h"
+#include "common.h"
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#define IS(w, y) !strcmp(w, y)
#include "masm_tools.h"
enum op_flags {
- OPF_RMD = (1 << 0), /* removed or optimized out */
+ OPF_RMD = (1 << 0), /* removed from code generation */
OPF_DATA = (1 << 1), /* data processing - writes to dst opr */
OPF_FLAGS = (1 << 2), /* sets flags */
- OPF_JMP = (1 << 3), /* branches, ret and call */
- OPF_CC = (1 << 4), /* uses flags */
- OPF_TAIL = (1 << 5), /* ret or tail call */
- OPF_RSAVE = (1 << 6), /* push/pop is local reg save/load */
- OPF_REP = (1 << 7), /* prefixed by rep */
- OPF_REPZ = (1 << 8), /* rep is repe/repz */
- OPF_REPNZ = (1 << 9), /* rep is repne/repnz */
- OPF_FARG = (1 << 10), /* push collected as func arg (no reuse) */
- OPF_EBP_S = (1 << 11), /* ebp used as scratch here, not BP */
- OPF_DF = (1 << 12), /* DF flag set */
+ OPF_JMP = (1 << 3), /* branch, call */
+ OPF_CJMP = (1 << 4), /* cond. branch (cc or jecxz/loop) */
+ OPF_CC = (1 << 5), /* uses flags */
+ OPF_TAIL = (1 << 6), /* ret or tail call */
+ OPF_RSAVE = (1 << 7), /* push/pop is local reg save/load */
+ OPF_REP = (1 << 8), /* prefixed by rep */
+ OPF_REPZ = (1 << 9), /* rep is repe/repz */
+ OPF_REPNZ = (1 << 10), /* rep is repne/repnz */
+ OPF_FARG = (1 << 11), /* push collected as func arg */
+ OPF_FARGNR = (1 << 12), /* push collected as func arg (no reuse) */
+ OPF_EBP_S = (1 << 13), /* ebp used as scratch here, not BP */
+ OPF_DF = (1 << 14), /* DF flag set */
+ OPF_ATAIL = (1 << 15), /* tail call with reused arg frame */
+ OPF_32BIT = (1 << 16), /* 32bit division */
+ OPF_LOCK = (1 << 17), /* op has lock prefix */
+ OPF_VAPUSH = (1 << 18), /* vararg ptr push (as call arg) */
+ OPF_DONE = (1 << 19), /* already fully handled by analysis */
+ OPF_PPUSH = (1 << 20), /* part of complex push-pop graph */
+ OPF_NOREGS = (1 << 21), /* don't track regs of this op */
+ OPF_FPUSH = (1 << 22), /* pushes x87 stack */
+ OPF_FPOP = (1 << 23), /* pops x87 stack */
+ OPF_FSHIFT = (1 << 24), /* x87 stack shift is actually needed */
};
enum op_op {
OP_LEA,
OP_MOVZX,
OP_MOVSX,
+ OP_XCHG,
OP_NOT,
+ OP_XLAT,
OP_CDQ,
+ OP_LODS,
OP_STOS,
OP_MOVS,
OP_CMPS,
OP_SHL,
OP_SHR,
OP_SAR,
+ OP_SHLD,
+ OP_SHRD,
OP_ROL,
OP_ROR,
+ OP_RCL,
+ OP_RCR,
OP_ADC,
OP_SBB,
+ OP_BSF,
OP_INC,
OP_DEC,
OP_NEG,
OP_CMP,
OP_CALL,
OP_JMP,
- OP_JO,
- OP_JNO,
- OP_JC,
- OP_JNC,
- OP_JZ,
- OP_JNZ,
- OP_JBE,
- OP_JA,
- OP_JS,
- OP_JNS,
- OP_JP,
- OP_JNP,
- OP_JL,
- OP_JGE,
- OP_JLE,
- OP_JG,
+ OP_JECXZ,
+ OP_LOOP,
+ OP_JCC,
+ OP_SCC,
+ // x87
+ OP_FLD,
+ OP_FILD,
+ OP_FLDc,
+ OP_FST,
+ OP_FADD,
+ OP_FDIV,
+ OP_FMUL,
+ OP_FSUB,
+ OP_FDIVR,
+ OP_FSUBR,
+ OP_FIADD,
+ OP_FIDIV,
+ OP_FIMUL,
+ OP_FISUB,
+ OP_FIDIVR,
+ OP_FISUBR,
+ OP_FCOS,
+ OP_FPATAN,
+ OP_FPTAN,
+ OP_FSIN,
+ OP_FSQRT,
+ // mmx
+ OP_EMMS,
+ // pseudo-ops for lib calls
+ OPP_FTOL,
+ // undefined
+ OP_UD2,
};
enum opr_type {
OPLM_BYTE,
OPLM_WORD,
OPLM_DWORD,
+ OPLM_QWORD,
};
+#define MAX_EXITS 128
+
#define MAX_OPERANDS 3
+#define NAMELEN 112
+
+#define OPR_INIT(type_, lmod_, reg_) \
+ { type_, lmod_, reg_, }
struct parsed_opr {
enum opr_type type;
enum opr_lenmod lmod;
+ int reg;
unsigned int is_ptr:1; // pointer in C
unsigned int is_array:1; // array in C
unsigned int type_from_var:1; // .. in header, sometimes wrong
unsigned int size_mismatch:1; // type override differs from C
unsigned int size_lt:1; // type override is larger than C
unsigned int had_ds:1; // had ds: prefix
- int reg;
+ const struct parsed_proto *pp; // for OPT_LABEL
unsigned int val;
- char name[256];
+ char name[NAMELEN];
};
struct parsed_op {
enum op_op op;
struct parsed_opr operand[MAX_OPERANDS];
unsigned int flags;
- int operand_cnt;
+ unsigned char pfo;
+ unsigned char pfo_inv;
+ unsigned char operand_cnt;
+ unsigned char p_argnum; // arg push: altered before call arg #
+ unsigned char p_arggrp; // arg push: arg group # for above
+ unsigned char p_argpass;// arg push: arg of host func
+ short p_argnext;// arg push: same arg pushed elsewhere or -1
int regmask_src; // all referensed regs
int regmask_dst;
int pfomask; // flagop: parsed_flag_op that can't be delayed
- int argnum; // push: altered before call arg #
int cc_scratch; // scratch storage during analysis
int bt_i; // branch target for branches
struct parsed_data *btj;// branch targets for jumptables
+ struct parsed_proto *pp;// parsed_proto for OP_CALL
void *datap;
+ int asmln;
};
// datap:
-// OP_CALL - parser proto hint (str), ptr to struct parsed_proto
-// (OPF_CC) - point to one of (OPF_FLAGS) that affects cc op
+// on start: function/data type hint (sctproto)
+// after analysis:
+// (OPF_CC) - points to one of (OPF_FLAGS) that affects cc op
+// OP_PUSH - points to OP_POP in complex push/pop graph
+// OP_POP - points to OP_PUSH in simple push/pop pair
struct parsed_equ {
char name[64];
IDAFA_FPD = (1 << 5),
};
-#define MAX_OPS 4096
+enum sct_func_attr {
+ SCTFA_CLEAR_SF = (1 << 0), // clear stack frame
+ SCTFA_CLEAR_REGS = (1 << 1), // clear registers (mask)
+};
+
+enum x87_const {
+ X87_CONST_1 = 1,
+ X87_CONST_2T,
+ X87_CONST_2E,
+ X87_CONST_PI,
+ X87_CONST_LG2,
+ X87_CONST_LN2,
+ X87_CONST_Z,
+};
+
+// note: limited to 32k due to p_argnext
+#define MAX_OPS 4096
+#define MAX_ARG_GRP 2
static struct parsed_op ops[MAX_OPS];
static struct parsed_equ *g_eqs;
static int g_eqcnt;
-static char g_labels[MAX_OPS][32];
+static char *g_labels[MAX_OPS];
static struct label_ref g_label_refs[MAX_OPS];
static const struct parsed_proto *g_func_pp;
static struct parsed_data *g_func_pd;
static int g_func_pd_cnt;
+static int g_func_lmods;
static char g_func[256];
static char g_comment[256];
static int g_bp_frame;
static int g_stack_frame_used;
static int g_stack_fsz;
static int g_ida_func_attr;
+static int g_sct_func_attr;
+static int g_stack_clear_start; // in dwords
+static int g_stack_clear_len;
+static int g_regmask_init;
+static int g_skip_func;
static int g_allow_regfunc;
+static int g_quiet_pp;
+static int g_header_mode;
+
#define ferr(op_, fmt, ...) do { \
- printf("error:%s:#%zd: '%s': " fmt, g_func, (op_) - ops, \
- dump_op(op_), ##__VA_ARGS__); \
+ printf("%s:%d: error %u: [%s] '%s': " fmt, asmfn, (op_)->asmln, \
+ __LINE__, g_func, dump_op(op_), ##__VA_ARGS__); \
fcloseall(); \
exit(1); \
} while (0)
#define fnote(op_, fmt, ...) \
- printf("error:%s:#%zd: '%s': " fmt, g_func, (op_) - ops, \
+ printf("%s:%d: note: [%s] '%s': " fmt, asmfn, (op_)->asmln, g_func, \
dump_op(op_), ##__VA_ARGS__)
-#define MAX_REGS 8
+#define ferr_assert(op_, cond) do { \
+ if (!(cond)) ferr(op_, "assertion '%s' failed\n", #cond); \
+} while (0)
-const char *regs_r32[] = { "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp" };
+const char *regs_r32[] = {
+ "eax", "ebx", "ecx", "edx", "esi", "edi", "ebp", "esp",
+ // not r32, but list here for easy parsing and printing
+ "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7",
+ "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)"
+};
const char *regs_r16[] = { "ax", "bx", "cx", "dx", "si", "di", "bp", "sp" };
const char *regs_r8l[] = { "al", "bl", "cl", "dl" };
const char *regs_r8h[] = { "ah", "bh", "ch", "dh" };
-enum x86_regs { xUNSPEC = -1, xAX, xBX, xCX, xDX, xSI, xDI, xBP, xSP };
+enum x86_regs {
+ xUNSPEC = -1,
+ xAX, xBX, xCX, xDX,
+ xSI, xDI, xBP, xSP,
+ xMM0, xMM1, xMM2, xMM3, // mmx
+ xMM4, xMM5, xMM6, xMM7,
+ xST0, xST1, xST2, xST3, // x87
+ xST4, xST5, xST6, xST7,
+};
+
+#define mxAX (1 << xAX)
+#define mxCX (1 << xCX)
+#define mxDX (1 << xDX)
+#define mxST0 (1 << xST0)
+#define mxST1 (1 << xST1)
// possible basic comparison types (without inversion)
enum parsed_flag_op {
PFO_LE, // e ZF=1||SF!=OF
};
+#define PFOB_O (1 << PFO_O)
+#define PFOB_C (1 << PFO_C)
+#define PFOB_Z (1 << PFO_Z)
+#define PFOB_S (1 << PFO_S)
+
static const char *parsed_flag_op_names[] = {
"o", "c", "z", "be", "s", "p", "l", "le"
};
snprintf(buf, buf_size, number < 10 ? "%lu" : "0x%02lx", number);
}
+static int check_segment_prefix(const char *s)
+{
+ if (s[0] == 0 || s[1] != 's' || s[2] != ':')
+ return 0;
+
+ switch (s[0]) {
+ case 'c': return 1;
+ case 'd': return 2;
+ case 's': return 3;
+ case 'e': return 4;
+ case 'f': return 5;
+ case 'g': return 6;
+ default: return 0;
+ }
+}
+
static int parse_reg(enum opr_lenmod *reg_lmod, const char *s)
{
int reg;
reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s);
+ if (reg >= 8) {
+ *reg_lmod = OPLM_QWORD;
+ return reg;
+ }
if (reg >= 0) {
*reg_lmod = OPLM_DWORD;
return reg;
s++;
*d = 0;
- // skip 'ds:' prefix
- if (IS_START(s, "ds:"))
+ // skip '?s:' prefixes
+ if (check_segment_prefix(s))
s += 3;
s = next_idt(w, sizeof(w), s);
return 0;
}
-static const char *parse_stack_el(const char *name, char *extra_reg)
+static const char *parse_stack_el(const char *name, char *extra_reg,
+ int early_try)
{
const char *p, *p2, *s;
char *endp = NULL;
long val;
int len;
- p = name;
- if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) {
- p += 4;
- if (extra_reg != NULL) {
- strncpy(extra_reg, name, 3);
- extra_reg[4] = 0;
+ if (g_bp_frame || early_try)
+ {
+ p = name;
+ if (IS_START(p + 3, "+ebp+") && is_reg_in_str(p)) {
+ p += 4;
+ if (extra_reg != NULL) {
+ strncpy(extra_reg, name, 3);
+ extra_reg[4] = 0;
+ }
}
- }
- if (IS_START(p, "ebp+")) {
- p += 4;
+ if (IS_START(p, "ebp+")) {
+ p += 4;
- p2 = strchr(p, '+');
- if (p2 != NULL && is_reg_in_str(p)) {
- if (extra_reg != NULL) {
- strncpy(extra_reg, p, p2 - p);
- extra_reg[p2 - p] = 0;
+ p2 = strchr(p, '+');
+ if (p2 != NULL && is_reg_in_str(p)) {
+ if (extra_reg != NULL) {
+ strncpy(extra_reg, p, p2 - p);
+ extra_reg[p2 - p] = 0;
+ }
+ p = p2 + 1;
}
- p = p2 + 1;
- }
- if (!('0' <= *p && *p <= '9'))
- return p;
+ if (!('0' <= *p && *p <= '9'))
+ return p;
- return NULL;
+ return NULL;
+ }
}
if (!IS_START(name, "esp+"))
return NULL;
- p = strchr(name + 4, '+');
+ s = name + 4;
+ p = strchr(s, '+');
if (p) {
- // must be a number after esp+, already converted to 0x..
- s = name + 4;
+ if (is_reg_in_str(s)) {
+ if (extra_reg != NULL) {
+ strncpy(extra_reg, s, p - s);
+ extra_reg[p - s] = 0;
+ }
+ s = p + 1;
+ p = strchr(s, '+');
+ if (p == NULL)
+ aerr("%s IDA stackvar not set?\n", __func__);
+ }
if (!('0' <= *s && *s <= '9')) {
- aerr("%s nan?\n", __func__);
+ aerr("%s IDA stackvar offset not set?\n", __func__);
return NULL;
}
if (s[0] == '0' && s[1] == 'x')
static int guess_lmod_from_name(struct parsed_opr *opr)
{
- if (!strncmp(opr->name, "dword_", 6)) {
+ if (IS_START(opr->name, "dword_") || IS_START(opr->name, "off_")) {
opr->lmod = OPLM_DWORD;
return 1;
}
- if (!strncmp(opr->name, "word_", 5)) {
+ if (IS_START(opr->name, "word_")) {
opr->lmod = OPLM_WORD;
return 1;
}
- if (!strncmp(opr->name, "byte_", 5)) {
+ if (IS_START(opr->name, "byte_")) {
opr->lmod = OPLM_BYTE;
return 1;
}
+ if (IS_START(opr->name, "qword_")) {
+ opr->lmod = OPLM_QWORD;
+ return 1;
+ }
return 0;
}
const struct parsed_type *c_type)
{
static const char *dword_types[] = {
- "int", "_DWORD", "UINT_PTR", "DWORD",
- "WPARAM", "LPARAM", "UINT",
- "HIMC",
+ "uint32_t", "int", "_DWORD", "UINT_PTR", "DWORD",
+ "WPARAM", "LPARAM", "UINT", "__int32",
+ "LONG", "HIMC", "BOOL", "size_t",
+ "float",
};
static const char *word_types[] = {
- "uint16_t", "int16_t", "_WORD",
+ "uint16_t", "int16_t", "_WORD", "WORD",
"unsigned __int16", "__int16",
};
static const char *byte_types[] = {
"uint8_t", "int8_t", "char",
"unsigned __int8", "__int8", "BYTE", "_BYTE",
- "_UNKNOWN",
+ "CHAR", "_UNKNOWN",
+ // structures.. deal the same as with _UNKNOWN for now
+ "CRITICAL_SECTION",
};
const char *n;
int i;
return 0;
}
+static char *default_cast_to(char *buf, size_t buf_size,
+ struct parsed_opr *opr)
+{
+ buf[0] = 0;
+
+ if (!opr->is_ptr || strchr(opr->name, '['))
+ return buf;
+ if (opr->pp == NULL || opr->pp->type.name == NULL
+ || opr->pp->is_fptr)
+ {
+ snprintf(buf, buf_size, "%s", "(void *)");
+ return buf;
+ }
+
+ snprintf(buf, buf_size, "(%s)", opr->pp->type.name);
+ return buf;
+}
+
static enum opr_type lmod_from_directive(const char *d)
{
if (IS(d, "dd"))
int *regmask, int *regmask_indirect,
char words[16][256], int wordc, int w, unsigned int op_flags)
{
- const struct parsed_proto *pp;
+ const struct parsed_proto *pp = NULL;
enum opr_lenmod tmplmod;
unsigned long number;
char buf[256];
if (label != NULL) {
opr->type = OPT_LABEL;
- if (IS_START(label, "ds:")) {
+ ret = check_segment_prefix(label);
+ if (ret != 0) {
+ if (ret >= 5)
+ aerr("fs/gs used\n");
opr->had_ds = 1;
label += 3;
}
opr->lmod = OPLM_WORD;
else if (IS(words[w], "byte"))
opr->lmod = OPLM_BYTE;
+ else if (IS(words[w], "qword"))
+ opr->lmod = OPLM_QWORD;
else
aerr("type parsing failed\n");
w += 2;
if (wordc_in == 2) {
if (IS(words[w], "offset")) {
opr->type = OPT_OFFSET;
+ opr->lmod = OPLM_DWORD;
strcpy(opr->name, words[w + 1]);
- return wordc;
+ pp = proto_parse(g_fhdr, opr->name, 1);
+ goto do_label;
}
if (IS(words[w], "(offset")) {
p = strchr(words[w + 1], ')');
if (wordc_in != 1)
aerr("parse_operand 1 word expected\n");
- if (IS_START(words[w], "ds:")) {
+ ret = check_segment_prefix(words[w]);
+ if (ret != 0) {
+ if (ret >= 5)
+ aerr("fs/gs used\n");
opr->had_ds = 1;
memmove(words[w], words[w] + 3, strlen(words[w]) - 2);
}
aerr("[] parse failure\n");
parse_indmode(opr->name, regmask_indirect, 1);
- if (opr->lmod == OPLM_UNSPEC && parse_stack_el(opr->name, NULL)) {
+ if (opr->lmod == OPLM_UNSPEC && parse_stack_el(opr->name, NULL, 1))
+ {
// might be an equ
struct parsed_equ *eq =
- equ_find(NULL, parse_stack_el(opr->name, NULL), &i);
+ equ_find(NULL, parse_stack_el(opr->name, NULL, 1), &i);
if (eq)
opr->lmod = eq->lmod;
+
+ // might be unaligned access
+ g_func_lmods |= 1 << OPLM_BYTE;
}
return wordc;
}
// most likely var in data segment
opr->type = OPT_LABEL;
- pp = proto_parse(g_fhdr, opr->name, 0);
+ pp = proto_parse(g_fhdr, opr->name, g_quiet_pp);
do_label:
if (pp != NULL) {
}
opr->is_array = pp->type.is_array;
}
+ opr->pp = pp;
if (opr->lmod == OPLM_UNSPEC)
guess_lmod_from_name(opr);
{ "repz", OPF_REP|OPF_REPZ },
{ "repne", OPF_REP|OPF_REPNZ },
{ "repnz", OPF_REP|OPF_REPNZ },
+ { "lock", OPF_LOCK }, // ignored for now..
};
+#define OPF_CJMP_CC (OPF_JMP|OPF_CJMP|OPF_CC)
+
static const struct {
const char *name;
enum op_op op;
- unsigned int minopr;
- unsigned int maxopr;
+ unsigned short minopr;
+ unsigned short maxopr;
unsigned int flags;
+ unsigned char pfo;
+ unsigned char pfo_inv;
} op_table[] = {
{ "nop", OP_NOP, 0, 0, 0 },
{ "push", OP_PUSH, 1, 1, 0 },
{ "lea", OP_LEA, 2, 2, OPF_DATA },
{ "movzx",OP_MOVZX, 2, 2, OPF_DATA },
{ "movsx",OP_MOVSX, 2, 2, OPF_DATA },
+ { "xchg", OP_XCHG, 2, 2, OPF_DATA },
{ "not", OP_NOT, 1, 1, OPF_DATA },
+ { "xlat", OP_XLAT, 0, 0, OPF_DATA },
{ "cdq", OP_CDQ, 0, 0, OPF_DATA },
+ { "lodsb",OP_LODS, 0, 0, OPF_DATA },
+ { "lodsw",OP_LODS, 0, 0, OPF_DATA },
+ { "lodsd",OP_LODS, 0, 0, OPF_DATA },
{ "stosb",OP_STOS, 0, 0, OPF_DATA },
{ "stosw",OP_STOS, 0, 0, OPF_DATA },
{ "stosd",OP_STOS, 0, 0, OPF_DATA },
{ "shr", OP_SHR, 2, 2, OPF_DATA|OPF_FLAGS },
{ "sal", OP_SHL, 2, 2, OPF_DATA|OPF_FLAGS },
{ "sar", OP_SAR, 2, 2, OPF_DATA|OPF_FLAGS },
+ { "shld", OP_SHLD, 3, 3, OPF_DATA|OPF_FLAGS },
+ { "shrd", OP_SHRD, 3, 3, OPF_DATA|OPF_FLAGS },
{ "rol", OP_ROL, 2, 2, OPF_DATA|OPF_FLAGS },
{ "ror", OP_ROR, 2, 2, OPF_DATA|OPF_FLAGS },
- { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC },
- { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC },
+ { "rcl", OP_RCL, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C },
+ { "rcr", OP_RCR, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C },
+ { "adc", OP_ADC, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C },
+ { "sbb", OP_SBB, 2, 2, OPF_DATA|OPF_FLAGS|OPF_CC, PFO_C },
+ { "bsf", OP_BSF, 2, 2, OPF_DATA|OPF_FLAGS },
{ "inc", OP_INC, 1, 1, OPF_DATA|OPF_FLAGS },
{ "dec", OP_DEC, 1, 1, OPF_DATA|OPF_FLAGS },
{ "neg", OP_NEG, 1, 1, OPF_DATA|OPF_FLAGS },
{ "retn", OP_RET, 0, 1, OPF_TAIL },
{ "call", OP_CALL, 1, 1, OPF_JMP|OPF_DATA|OPF_FLAGS },
{ "jmp", OP_JMP, 1, 1, OPF_JMP },
- { "jo", OP_JO, 1, 1, OPF_JMP|OPF_CC }, // 70 OF=1
- { "jno", OP_JNO, 1, 1, OPF_JMP|OPF_CC }, // 71 OF=0
- { "jc", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72 CF=1
- { "jb", OP_JC, 1, 1, OPF_JMP|OPF_CC }, // 72
- { "jnc", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73 CF=0
- { "jnb", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73
- { "jae", OP_JNC, 1, 1, OPF_JMP|OPF_CC }, // 73
- { "jz", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74 ZF=1
- { "je", OP_JZ, 1, 1, OPF_JMP|OPF_CC }, // 74
- { "jnz", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75 ZF=0
- { "jne", OP_JNZ, 1, 1, OPF_JMP|OPF_CC }, // 75
- { "jbe", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76 CF=1 || ZF=1
- { "jna", OP_JBE, 1, 1, OPF_JMP|OPF_CC }, // 76
- { "ja", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77 CF=0 && ZF=0
- { "jnbe", OP_JA, 1, 1, OPF_JMP|OPF_CC }, // 77
- { "js", OP_JS, 1, 1, OPF_JMP|OPF_CC }, // 78 SF=1
- { "jns", OP_JNS, 1, 1, OPF_JMP|OPF_CC }, // 79 SF=0
- { "jp", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a PF=1
- { "jpe", OP_JP, 1, 1, OPF_JMP|OPF_CC }, // 7a
- { "jnp", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b PF=0
- { "jpo", OP_JNP, 1, 1, OPF_JMP|OPF_CC }, // 7b
- { "jl", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c SF!=OF
- { "jnge", OP_JL, 1, 1, OPF_JMP|OPF_CC }, // 7c
- { "jge", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d SF=OF
- { "jnl", OP_JGE, 1, 1, OPF_JMP|OPF_CC }, // 7d
- { "jle", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e ZF=1 || SF!=OF
- { "jng", OP_JLE, 1, 1, OPF_JMP|OPF_CC }, // 7e
- { "jg", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f ZF=0 && SF=OF
- { "jnle", OP_JG, 1, 1, OPF_JMP|OPF_CC }, // 7f
- { "seto", OP_JO, 1, 1, OPF_DATA|OPF_CC },
- { "setno", OP_JNO, 1, 1, OPF_DATA|OPF_CC },
- { "setc", OP_JC, 1, 1, OPF_DATA|OPF_CC },
- { "setb", OP_JC, 1, 1, OPF_DATA|OPF_CC },
- { "setnc", OP_JNC, 1, 1, OPF_DATA|OPF_CC },
- { "setae", OP_JNC, 1, 1, OPF_DATA|OPF_CC },
- { "setz", OP_JZ, 1, 1, OPF_DATA|OPF_CC },
- { "sete", OP_JZ, 1, 1, OPF_DATA|OPF_CC },
- { "setnz", OP_JNZ, 1, 1, OPF_DATA|OPF_CC },
- { "setne", OP_JNZ, 1, 1, OPF_DATA|OPF_CC },
- { "setbe", OP_JBE, 1, 1, OPF_DATA|OPF_CC },
- { "setna", OP_JBE, 1, 1, OPF_DATA|OPF_CC },
- { "seta", OP_JA, 1, 1, OPF_DATA|OPF_CC },
- { "setnbe", OP_JA, 1, 1, OPF_DATA|OPF_CC },
- { "sets", OP_JS, 1, 1, OPF_DATA|OPF_CC },
- { "setns", OP_JNS, 1, 1, OPF_DATA|OPF_CC },
- { "setp", OP_JP, 1, 1, OPF_DATA|OPF_CC },
- { "setpe", OP_JP, 1, 1, OPF_DATA|OPF_CC },
- { "setnp", OP_JNP, 1, 1, OPF_DATA|OPF_CC },
- { "setpo", OP_JNP, 1, 1, OPF_DATA|OPF_CC },
- { "setl", OP_JL, 1, 1, OPF_DATA|OPF_CC },
- { "setnge", OP_JL, 1, 1, OPF_DATA|OPF_CC },
- { "setge", OP_JGE, 1, 1, OPF_DATA|OPF_CC },
- { "setnl", OP_JGE, 1, 1, OPF_DATA|OPF_CC },
- { "setle", OP_JLE, 1, 1, OPF_DATA|OPF_CC },
- { "setng", OP_JLE, 1, 1, OPF_DATA|OPF_CC },
- { "setg", OP_JG, 1, 1, OPF_DATA|OPF_CC },
- { "setnle", OP_JG, 1, 1, OPF_DATA|OPF_CC },
+ { "jecxz",OP_JECXZ, 1, 1, OPF_JMP|OPF_CJMP },
+ { "loop", OP_LOOP, 1, 1, OPF_JMP|OPF_CJMP|OPF_DATA },
+ { "jo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 0 }, // 70 OF=1
+ { "jno", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_O, 1 }, // 71 OF=0
+ { "jc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72 CF=1
+ { "jb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 0 }, // 72
+ { "jnc", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73 CF=0
+ { "jnb", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73
+ { "jae", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_C, 1 }, // 73
+ { "jz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74 ZF=1
+ { "je", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 0 }, // 74
+ { "jnz", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75 ZF=0
+ { "jne", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_Z, 1 }, // 75
+ { "jbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76 CF=1||ZF=1
+ { "jna", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 0 }, // 76
+ { "ja", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77 CF=0&&ZF=0
+ { "jnbe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_BE, 1 }, // 77
+ { "js", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 0 }, // 78 SF=1
+ { "jns", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_S, 1 }, // 79 SF=0
+ { "jp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a PF=1
+ { "jpe", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 0 }, // 7a
+ { "jnp", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b PF=0
+ { "jpo", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_P, 1 }, // 7b
+ { "jl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c SF!=OF
+ { "jnge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 0 }, // 7c
+ { "jge", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d SF=OF
+ { "jnl", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_L, 1 }, // 7d
+ { "jle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e ZF=1||SF!=OF
+ { "jng", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 0 }, // 7e
+ { "jg", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f ZF=0&&SF=OF
+ { "jnle", OP_JCC, 1, 1, OPF_CJMP_CC, PFO_LE, 1 }, // 7f
+ { "seto", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 0 },
+ { "setno", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_O, 1 },
+ { "setc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 },
+ { "setb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 0 },
+ { "setnc", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 },
+ { "setae", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 },
+ { "setnb", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_C, 1 },
+ { "setz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 },
+ { "sete", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 0 },
+ { "setnz", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 },
+ { "setne", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_Z, 1 },
+ { "setbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 },
+ { "setna", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 0 },
+ { "seta", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 },
+ { "setnbe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_BE, 1 },
+ { "sets", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 0 },
+ { "setns", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_S, 1 },
+ { "setp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 },
+ { "setpe", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 0 },
+ { "setnp", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 },
+ { "setpo", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_P, 1 },
+ { "setl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 },
+ { "setnge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 0 },
+ { "setge", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 },
+ { "setnl", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_L, 1 },
+ { "setle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 },
+ { "setng", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 0 },
+ { "setg", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 },
+ { "setnle", OP_SCC, 1, 1, OPF_DATA|OPF_CC, PFO_LE, 1 },
+ // x87
+ { "fld", OP_FLD, 1, 1, OPF_FPUSH },
+ { "fild", OP_FILD, 1, 1, OPF_FPUSH },
+ { "fld1", OP_FLDc, 0, 0, OPF_FPUSH },
+ { "fldz", OP_FLDc, 0, 0, OPF_FPUSH },
+ { "fstp", OP_FST, 1, 1, OPF_FPOP },
+ { "fst", OP_FST, 1, 1, 0 },
+ { "fadd", OP_FADD, 0, 2, 0 },
+ { "faddp", OP_FADD, 0, 2, OPF_FPOP },
+ { "fdiv", OP_FDIV, 0, 2, 0 },
+ { "fdivp", OP_FDIV, 0, 2, OPF_FPOP },
+ { "fmul", OP_FMUL, 0, 2, 0 },
+ { "fmulp", OP_FMUL, 0, 2, OPF_FPOP },
+ { "fsub", OP_FSUB, 0, 2, 0 },
+ { "fsubp", OP_FSUB, 0, 2, OPF_FPOP },
+ { "fdivr", OP_FDIVR, 0, 2, 0 },
+ { "fdivrp", OP_FDIVR, 0, 2, OPF_FPOP },
+ { "fsubr", OP_FSUBR, 0, 2, 0 },
+ { "fsubrp", OP_FSUBR, 0, 2, OPF_FPOP },
+ { "fiadd", OP_FIADD, 1, 1, 0 },
+ { "fidiv", OP_FIDIV, 1, 1, 0 },
+ { "fimul", OP_FIMUL, 1, 1, 0 },
+ { "fisub", OP_FISUB, 1, 1, 0 },
+ { "fidivr", OP_FIDIVR, 1, 1, 0 },
+ { "fisubr", OP_FISUBR, 1, 1, 0 },
+ { "fcos", OP_FCOS, 0, 0, 0 },
+ { "fpatan", OP_FPATAN, 0, 0, OPF_FPOP },
+ { "fptan", OP_FPTAN, 0, 0, OPF_FPUSH },
+ { "fsin", OP_FSIN, 0, 0, 0 },
+ { "fsqrt", OP_FSQRT, 0, 0, 0 },
+ // mmx
+ { "emms", OP_EMMS, 0, 0, OPF_DATA },
+ { "movq", OP_MOV, 2, 2, OPF_DATA },
+ // pseudo-ops for lib calls
+ { "_ftol", OPP_FTOL },
+ // must be last
+ { "ud2", OP_UD2 },
};
static void parse_op(struct parsed_op *op, char words[16][256], int wordc)
int op_w = 0;
int opr = 0;
int w = 0;
- int i;
+ int i, j;
for (i = 0; i < ARRAY_SIZE(pref_table); i++) {
if (IS(words[w], pref_table[i].name)) {
break;
}
- if (i == ARRAY_SIZE(op_table))
- aerr("unhandled op: '%s'\n", words[0]);
+ if (i == ARRAY_SIZE(op_table)) {
+ if (!g_skip_func)
+ aerr("unhandled op: '%s'\n", words[0]);
+ i--; // OP_UD2
+ }
w++;
op->op = op_table[i].op;
op->flags = op_table[i].flags | prefix_flags;
+ op->pfo = op_table[i].pfo;
+ op->pfo_inv = op_table[i].pfo_inv;
op->regmask_src = op->regmask_dst = 0;
+ op->asmln = asmln;
+
+ if (op->op == OP_UD2)
+ return;
+
+ for (opr = 0; opr < op_table[i].maxopr; opr++) {
+ if (opr >= op_table[i].minopr && w >= wordc)
+ break;
- for (opr = 0; opr < op_table[i].minopr; opr++) {
regmask = regmask_ind = 0;
w = parse_operand(&op->operand[opr], ®mask, ®mask_ind,
words, wordc, w, op->flags);
if (opr == 0 && (op->flags & OPF_DATA))
op->regmask_dst = regmask;
- // for now, mark dst as src too
- op->regmask_src |= regmask | regmask_ind;
- }
+ else
+ op->regmask_src |= regmask;
+ op->regmask_src |= regmask_ind;
- for (; w < wordc && opr < op_table[i].maxopr; opr++) {
- w = parse_operand(&op->operand[opr],
- &op->regmask_src, &op->regmask_src,
- words, wordc, w, op->flags);
+ if (op->operand[opr].lmod != OPLM_UNSPEC)
+ g_func_lmods |= 1 << op->operand[opr].lmod;
}
if (w < wordc)
if (!strncmp(op_table[i].name, "set", 3))
op->operand[0].lmod = OPLM_BYTE;
- // ops with implicit argumets
switch (op->op) {
+ // first operand is not dst
+ case OP_CMP:
+ case OP_TEST:
+ op->regmask_src |= op->regmask_dst;
+ op->regmask_dst = 0;
+ break;
+
+ // first operand is src too
+ case OP_NOT:
+ case OP_ADD:
+ case OP_AND:
+ case OP_OR:
+ case OP_RCL:
+ case OP_RCR:
+ case OP_ADC:
+ case OP_INC:
+ case OP_DEC:
+ case OP_NEG:
+ // more below..
+ op->regmask_src |= op->regmask_dst;
+ break;
+
+ // special
+ case OP_XCHG:
+ op->regmask_src |= op->regmask_dst;
+ op->regmask_dst |= op->regmask_src;
+ goto check_align;
+
+ case OP_SUB:
+ case OP_SBB:
+ case OP_XOR:
+ if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG
+ && op->operand[0].lmod == op->operand[1].lmod
+ && op->operand[0].reg == op->operand[1].reg
+ && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al..
+ {
+ op->regmask_src = 0;
+ }
+ else
+ op->regmask_src |= op->regmask_dst;
+ break;
+
+ // ops with implicit argumets
+ case OP_XLAT:
+ op->operand_cnt = 2;
+ setup_reg_opr(&op->operand[0], xAX, OPLM_BYTE, &op->regmask_src);
+ op->regmask_dst = op->regmask_src;
+ setup_reg_opr(&op->operand[1], xBX, OPLM_DWORD, &op->regmask_src);
+ break;
+
case OP_CDQ:
op->operand_cnt = 2;
setup_reg_opr(&op->operand[0], xDX, OPLM_DWORD, &op->regmask_dst);
setup_reg_opr(&op->operand[1], xAX, OPLM_DWORD, &op->regmask_src);
break;
+ case OP_LODS:
case OP_STOS:
case OP_SCAS:
- if (op->operand_cnt != 0)
- break;
if (words[op_w][4] == 'b')
lmod = OPLM_BYTE;
else if (words[op_w][4] == 'w')
lmod = OPLM_WORD;
else if (words[op_w][4] == 'd')
lmod = OPLM_DWORD;
- op->operand_cnt = 3;
- setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src);
- setup_reg_opr(&op->operand[1], xCX, OPLM_DWORD, &op->regmask_src);
+ j = 0;
+ op->regmask_src = 0;
+ setup_reg_opr(&op->operand[j++], op->op == OP_LODS ? xSI : xDI,
+ OPLM_DWORD, &op->regmask_src);
op->regmask_dst = op->regmask_src;
- setup_reg_opr(&op->operand[2], xAX, OPLM_DWORD, &op->regmask_src);
+ setup_reg_opr(&op->operand[j++], xAX, lmod,
+ op->op == OP_LODS ? &op->regmask_dst : &op->regmask_src);
+ if (op->flags & OPF_REP) {
+ setup_reg_opr(&op->operand[j++], xCX, OPLM_DWORD, &op->regmask_src);
+ op->regmask_dst |= 1 << xCX;
+ }
+ op->operand_cnt = j;
break;
case OP_MOVS:
case OP_CMPS:
- if (op->operand_cnt != 0)
- break;
if (words[op_w][4] == 'b')
lmod = OPLM_BYTE;
else if (words[op_w][4] == 'w')
lmod = OPLM_WORD;
else if (words[op_w][4] == 'd')
lmod = OPLM_DWORD;
- op->operand_cnt = 3;
- setup_reg_opr(&op->operand[0], xDI, lmod, &op->regmask_src);
- setup_reg_opr(&op->operand[1], xSI, OPLM_DWORD, &op->regmask_src);
- setup_reg_opr(&op->operand[2], xCX, OPLM_DWORD, &op->regmask_src);
+ j = 0;
+ op->regmask_src = 0;
+ // note: lmod is not correct, don't have where to place it
+ setup_reg_opr(&op->operand[j++], xDI, lmod, &op->regmask_src);
+ setup_reg_opr(&op->operand[j++], xSI, OPLM_DWORD, &op->regmask_src);
+ if (op->flags & OPF_REP)
+ setup_reg_opr(&op->operand[j++], xCX, OPLM_DWORD, &op->regmask_src);
+ op->operand_cnt = j;
op->regmask_dst = op->regmask_src;
break;
+ case OP_LOOP:
+ op->regmask_dst = 1 << xCX;
+ // fallthrough
+ case OP_JECXZ:
+ op->operand_cnt = 2;
+ op->regmask_src = 1 << xCX;
+ op->operand[1].type = OPT_REG;
+ op->operand[1].reg = xCX;
+ op->operand[1].lmod = OPLM_DWORD;
+ break;
+
case OP_IMUL:
+ if (op->operand_cnt == 2) {
+ if (op->operand[0].type != OPT_REG)
+ aerr("reg expected\n");
+ op->regmask_src |= 1 << op->operand[0].reg;
+ }
if (op->operand_cnt != 1)
break;
// fallthrough
case OP_MUL:
// singleop mul
+ op->regmask_src |= op->regmask_dst;
op->regmask_dst = (1 << xDX) | (1 << xAX);
- op->regmask_src |= (1 << xAX);
if (op->operand[0].lmod == OPLM_UNSPEC)
op->operand[0].lmod = OPLM_DWORD;
break;
case OP_IDIV:
// we could set up operands for edx:eax, but there is no real need to
// (see is_opr_modified())
- regmask = (1 << xDX) | (1 << xAX);
- op->regmask_dst = regmask;
- op->regmask_src |= regmask;
+ op->regmask_src |= op->regmask_dst;
+ op->regmask_dst = (1 << xDX) | (1 << xAX);
if (op->operand[0].lmod == OPLM_UNSPEC)
op->operand[0].lmod = OPLM_DWORD;
break;
case OP_SAR:
case OP_ROL:
case OP_ROR:
+ op->regmask_src |= op->regmask_dst;
if (op->operand[1].lmod == OPLM_UNSPEC)
op->operand[1].lmod = OPLM_BYTE;
break;
+ case OP_SHLD:
+ case OP_SHRD:
+ op->regmask_src |= op->regmask_dst;
+ if (op->operand[2].lmod == OPLM_UNSPEC)
+ op->operand[2].lmod = OPLM_BYTE;
+ break;
+
case OP_PUSH:
+ op->regmask_src |= op->regmask_dst;
+ op->regmask_dst = 0;
if (op->operand[0].lmod == OPLM_UNSPEC
&& (op->operand[0].type == OPT_CONST
|| op->operand[0].type == OPT_OFFSET
// alignment
case OP_MOV:
+ check_align:
if (op->operand[0].type == OPT_REG && op->operand[1].type == OPT_REG
- && op->operand[0].reg == xDI && op->operand[1].reg == xDI)
+ && op->operand[0].lmod == op->operand[1].lmod
+ && op->operand[0].reg == op->operand[1].reg
+ && IS(op->operand[0].name, op->operand[1].name)) // ! ah, al..
{
- op->flags |= OPF_RMD;
+ op->flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ op->regmask_src = op->regmask_dst = 0;
}
break;
char buf[16];
snprintf(buf, sizeof(buf), "%s+0", op->operand[0].name);
if (IS(buf, op->operand[1].name))
- op->flags |= OPF_RMD;
+ op->flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
}
break;
op->regmask_dst = 0;
break;
+ case OP_LEAVE:
+ op->regmask_dst = (1 << xBP) | (1 << xSP);
+ op->regmask_src = 1 << xBP;
+ break;
+
+ case OP_FLD:
+ case OP_FILD:
+ op->regmask_dst |= mxST0;
+ break;
+
+ case OP_FLDc:
+ op->regmask_dst |= mxST0;
+ if (IS(words[op_w] + 3, "1"))
+ op->operand[0].val = X87_CONST_1;
+ else if (IS(words[op_w] + 3, "z"))
+ op->operand[0].val = X87_CONST_Z;
+ else
+ aerr("TODO\n");
+ break;
+
+ case OP_FST:
+ op->regmask_src |= mxST0;
+ break;
+
+ case OP_FADD:
+ case OP_FDIV:
+ case OP_FMUL:
+ case OP_FSUB:
+ case OP_FDIVR:
+ case OP_FSUBR:
+ op->regmask_src |= mxST0;
+ if (op->operand_cnt == 2)
+ op->regmask_src |= op->regmask_dst;
+ else if (op->operand_cnt == 1) {
+ memcpy(&op->operand[1], &op->operand[0], sizeof(op->operand[1]));
+ op->operand[0].type = OPT_REG;
+ op->operand[0].lmod = OPLM_QWORD;
+ op->operand[0].reg = xST0;
+ op->regmask_dst |= mxST0;
+ }
+ else
+ // IDA doesn't use this
+ aerr("no operands?\n");
+ break;
+
+ case OP_FIADD:
+ case OP_FIDIV:
+ case OP_FIMUL:
+ case OP_FISUB:
+ case OP_FIDIVR:
+ case OP_FISUBR:
+ case OP_FCOS:
+ case OP_FSIN:
+ case OP_FSQRT:
+ op->regmask_src |= mxST0;
+ op->regmask_dst |= mxST0;
+ break;
+
+ case OP_FPATAN:
+ op->regmask_src |= mxST0 | mxST1;
+ op->regmask_dst |= mxST0;
+ break;
+
+ case OP_FPTAN:
+ aerr("TODO\n");
+ break;
+
default:
break;
}
+
+ if (op->operand[0].type == OPT_REG
+ && op->operand[1].type == OPT_CONST)
+ {
+ struct parsed_opr *op1 = &op->operand[1];
+ if ((op->op == OP_AND && op1->val == 0)
+ || (op->op == OP_OR
+ && (op1->val == ~0
+ || (op->operand[0].lmod == OPLM_WORD && op1->val == 0xffff)
+ || (op->operand[0].lmod == OPLM_BYTE && op1->val == 0xff))))
+ {
+ op->regmask_src = 0;
+ }
+ }
}
-static const char *op_name(enum op_op op)
+static const char *op_name(struct parsed_op *po)
{
+ static char buf[16];
+ char *p;
int i;
+ if (po->op == OP_JCC || po->op == OP_SCC) {
+ p = buf;
+ *p++ = (po->op == OP_JCC) ? 'j' : 's';
+ if (po->pfo_inv)
+ *p++ = 'n';
+ strcpy(p, parsed_flag_op_names[po->pfo]);
+ return buf;
+ }
+
for (i = 0; i < ARRAY_SIZE(op_table); i++)
- if (op_table[i].op == op)
+ if (op_table[i].op == po->op)
return op_table[i].name;
return "???";
if (po == NULL)
return "???";
- snprintf(out, sizeof(out), "%s", op_name(po->op));
+ snprintf(out, sizeof(out), "%s", op_name(po));
for (i = 0; i < po->operand_cnt; i++) {
p += strlen(p);
if (i > 0)
enum opr_lenmod lmod)
{
switch (lmod) {
+ case OPLM_QWORD:
+ return "u64";
case OPLM_DWORD:
return "u32";
case OPLM_WORD:
enum opr_lenmod lmod)
{
switch (lmod) {
+ case OPLM_QWORD:
+ return "";
case OPLM_DWORD:
return "";
case OPLM_WORD:
enum opr_lenmod lmod)
{
switch (lmod) {
+ case OPLM_QWORD:
+ return "*(u64 *)";
case OPLM_DWORD:
return "*(u32 *)";
case OPLM_WORD:
enum opr_lenmod lmod)
{
switch (lmod) {
+ case OPLM_QWORD:
+ return "(s64)";
case OPLM_DWORD:
return "(s32)";
case OPLM_WORD:
static int lmod_bytes(struct parsed_op *po, enum opr_lenmod lmod)
{
switch (lmod) {
+ case OPLM_QWORD:
+ return 8;
case OPLM_DWORD:
return 4;
case OPLM_WORD:
static const char *opr_reg_p(struct parsed_op *po, struct parsed_opr *popr)
{
- if ((unsigned int)popr->reg >= MAX_REGS)
+ if ((unsigned int)popr->reg >= ARRAY_SIZE(regs_r32))
ferr(po, "invalid reg: %d\n", popr->reg);
return regs_r32[popr->reg];
}
+static int check_simple_cast(const char *cast, int *bits, int *is_signed)
+{
+ if (IS_START(cast, "(s8)") || IS_START(cast, "(u8)"))
+ *bits = 8;
+ else if (IS_START(cast, "(s16)") || IS_START(cast, "(u16)"))
+ *bits = 16;
+ else if (IS_START(cast, "(s32)") || IS_START(cast, "(u32)"))
+ *bits = 32;
+ else if (IS_START(cast, "(s64)") || IS_START(cast, "(u64)"))
+ *bits = 64;
+ else
+ return -1;
+
+ *is_signed = cast[1] == 's' ? 1 : 0;
+ return 0;
+}
+
+static int check_deref_cast(const char *cast, int *bits)
+{
+ if (IS_START(cast, "*(u8 *)"))
+ *bits = 8;
+ else if (IS_START(cast, "*(u16 *)"))
+ *bits = 16;
+ else if (IS_START(cast, "*(u32 *)"))
+ *bits = 32;
+ else if (IS_START(cast, "*(u64 *)"))
+ *bits = 64;
+ else
+ return -1;
+
+ return 0;
+}
+
// cast1 is the "final" cast
static const char *simplify_cast(const char *cast1, const char *cast2)
{
static char buf[256];
+ int bits1, bits2;
+ int s1, s2;
if (cast1[0] == 0)
return cast2;
return cast1;
if (IS(cast1, cast2))
return cast1;
- if (IS(cast1, "(s8)") && IS(cast2, "(u8)"))
- return cast1;
- if (IS(cast1, "(s16)") && IS(cast2, "(u16)"))
- return cast1;
- if (IS(cast1, "(u8)") && IS_START(cast2, "*(u8 *)"))
- return cast2;
- if (IS(cast1, "(u16)") && IS_START(cast2, "*(u16 *)"))
- return cast2;
+
+ if (check_simple_cast(cast1, &bits1, &s1) == 0
+ && check_simple_cast(cast2, &bits2, &s2) == 0)
+ {
+ if (bits1 <= bits2)
+ return cast1;
+ }
+ if (check_simple_cast(cast1, &bits1, &s1) == 0
+ && check_deref_cast(cast2, &bits2) == 0)
+ {
+ if (bits1 == bits2) {
+ snprintf(buf, sizeof(buf), "*(%c%d *)", s1 ? 's' : 'u', bits1);
+ return buf;
+ }
+ }
+
if (strchr(cast1, '*') && IS_START(cast2, "(u32)"))
return cast1;
static int is_stack_access(struct parsed_op *po,
const struct parsed_opr *popr)
{
- return (parse_stack_el(popr->name, NULL)
+ return (parse_stack_el(popr->name, NULL, 0)
|| (g_bp_frame && !(po->flags & OPF_EBP_S)
&& IS_START(popr->name, "ebp")));
}
static void parse_stack_access(struct parsed_op *po,
const char *name, char *ofs_reg, int *offset_out,
- int *stack_ra_out, const char **bp_arg_out)
+ int *stack_ra_out, const char **bp_arg_out, int is_lea)
{
const char *bp_arg = "";
const char *p = NULL;
ferr(po, "ebp- parse of '%s' failed\n", name);
}
else {
- bp_arg = parse_stack_el(name, ofs_reg);
+ bp_arg = parse_stack_el(name, ofs_reg, 0);
snprintf(g_comment, sizeof(g_comment), "%s", bp_arg);
eq = equ_find(po, bp_arg, &offset);
if (eq == NULL)
if (!strncmp(name, "ebp", 3))
stack_ra = 4;
- if (ofs_reg[0] == 0 && stack_ra <= offset && offset < stack_ra + 4)
+ // yes it sometimes LEAs ra for compares..
+ if (!is_lea && ofs_reg[0] == 0
+ && stack_ra <= offset && offset < stack_ra + 4)
+ {
ferr(po, "reference to ra? %d %d\n", offset, stack_ra);
+ }
*offset_out = offset;
*stack_ra_out = stack_ra;
*bp_arg_out = bp_arg;
}
-static void stack_frame_access(struct parsed_op *po,
+static int stack_frame_access(struct parsed_op *po,
struct parsed_opr *popr, char *buf, size_t buf_size,
const char *name, const char *cast, int is_src, int is_lea)
{
int unaligned = 0;
int stack_ra = 0;
int offset = 0;
+ int retval = -1;
int sf_ofs;
int lim;
if (po->flags & OPF_EBP_S)
ferr(po, "stack_frame_access while ebp is scratch\n");
- parse_stack_access(po, name, ofs_reg, &offset, &stack_ra, &bp_arg);
+ parse_stack_access(po, name, ofs_reg, &offset,
+ &stack_ra, &bp_arg, is_lea);
if (offset > stack_ra)
{
if (cast[0] == 0)
cast = "(u32)";
snprintf(buf, buf_size, "%sap", cast);
- return;
+ return -1;
}
ferr(po, "offset %d (%s,%d) doesn't map to any arg\n",
offset, bp_arg, arg_i);
ferr(po, "arg %d not in prototype?\n", arg_i);
popr->is_ptr = g_func_pp->arg[i].type.is_ptr;
+ retval = i;
switch (popr->lmod)
{
// common problem
guess_lmod_from_c_type(&tmp_lmod, &g_func_pp->arg[i].type);
if (tmp_lmod != OPLM_DWORD
- && (unaligned || (!is_src && tmp_lmod < popr->lmod)))
+ && (unaligned || (!is_src && lmod_bytes(po, tmp_lmod)
+ < lmod_bytes(po, popr->lmod) + (offset & 3))))
{
ferr(po, "bp_arg arg%d/w offset %d and type '%s' is too small\n",
i + 1, offset, g_func_pp->arg[i].type.name);
}
- if (popr->is_ptr && popr->lmod != OPLM_DWORD)
- ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1);
+ // can't check this because msvc likes to reuse
+ // arg space for scratch..
+ //if (popr->is_ptr && popr->lmod != OPLM_DWORD)
+ // ferr(po, "bp_arg arg%d: non-dword ptr access\n", i + 1);
}
else
{
snprintf(buf, buf_size, "%ssf.d[%d]", prefix, sf_ofs / 4);
break;
+ case OPLM_QWORD:
+ ferr_assert(po, !(sf_ofs & 7));
+ ferr_assert(po, ofs_reg[0] == 0);
+ // float callers set is_lea
+ ferr_assert(po, is_lea);
+ snprintf(buf, buf_size, "%ssf.q[%d]", prefix, sf_ofs / 8);
+ break;
+
default:
ferr(po, "bp_stack bad lmod: %d\n", popr->lmod);
}
}
+
+ return retval;
}
static void check_func_pp(struct parsed_op *po,
const struct parsed_proto *pp, const char *pfx)
{
+ enum opr_lenmod tmp_lmod;
char buf[256];
+ int ret, i;
if (pp->argc_reg != 0) {
if (/*!g_allow_regfunc &&*/ !pp->is_fastcall) {
ferr(po, "%s: %d reg arg(s) with %d stack arg(s)\n",
pfx, pp->argc_reg, pp->argc_stack);
}
+
+ // fptrs must use 32bit args, callsite might have no information and
+ // lack a cast to smaller types, which results in incorrectly masked
+ // args passed (callee may assume masked args, it does on ARM)
+ if (!pp->is_osinc) {
+ for (i = 0; i < pp->argc; i++) {
+ ret = guess_lmod_from_c_type(&tmp_lmod, &pp->arg[i].type);
+ if (ret && tmp_lmod != OPLM_DWORD)
+ ferr(po, "reference to %s with arg%d '%s'\n", pp->name,
+ i + 1, pp->arg[i].type.name);
+ }
+ }
}
-static void check_label_read_ref(struct parsed_op *po, const char *name)
+static const char *check_label_read_ref(struct parsed_op *po,
+ const char *name)
{
const struct parsed_proto *pp;
if (pp->is_func)
check_func_pp(po, pp, "ref");
+
+ return pp->name;
}
static char *out_src_opr(char *buf, size_t buf_size,
{
char tmp1[256], tmp2[256];
char expr[256];
+ const char *name;
char *p;
int ret;
ferr(po, "lea from reg?\n");
switch (popr->lmod) {
+ case OPLM_QWORD:
+ snprintf(buf, buf_size, "%s%s.q", cast, opr_reg_p(po, popr));
+ break;
case OPLM_DWORD:
snprintf(buf, buf_size, "%s%s", cast, opr_reg_p(po, popr));
break;
break;
case OPT_LABEL:
- check_label_read_ref(po, popr->name);
+ name = check_label_read_ref(po, popr->name);
if (cast[0] == 0 && popr->is_ptr)
cast = "(u32)";
if (is_lea)
- snprintf(buf, buf_size, "(u32)&%s", popr->name);
+ snprintf(buf, buf_size, "(u32)&%s", name);
else if (popr->size_lt)
snprintf(buf, buf_size, "%s%s%s%s", cast,
lmod_cast_u_ptr(po, popr->lmod),
- popr->is_array ? "" : "&",
- popr->name);
+ popr->is_array ? "" : "&", name);
else
- snprintf(buf, buf_size, "%s%s%s", cast, popr->name,
+ snprintf(buf, buf_size, "%s%s%s", cast, name,
popr->is_array ? "[0]" : "");
break;
case OPT_OFFSET:
- check_label_read_ref(po, popr->name);
+ name = check_label_read_ref(po, popr->name);
if (cast[0] == 0)
cast = "(u32)";
if (is_lea)
ferr(po, "lea an offset?\n");
- snprintf(buf, buf_size, "%s&%s", cast, popr->name);
+ snprintf(buf, buf_size, "%s&%s", cast, name);
break;
case OPT_CONST:
switch (popr->type) {
case OPT_REG:
switch (popr->lmod) {
+ case OPLM_QWORD:
+ snprintf(buf, buf_size, "%s.q", opr_reg_p(po, popr));
+ break;
case OPLM_DWORD:
snprintf(buf, buf_size, "%s", opr_reg_p(po, popr));
break;
return out_src_opr(buf, buf_size, po, popr, NULL, 0);
}
-static enum parsed_flag_op split_cond(struct parsed_op *po,
- enum op_op op, int *is_inv)
+static char *out_src_opr_float(char *buf, size_t buf_size,
+ struct parsed_op *po, struct parsed_opr *popr)
{
- *is_inv = 0;
-
- switch (op) {
- case OP_JO:
- return PFO_O;
- case OP_JC:
- return PFO_C;
- case OP_JZ:
- return PFO_Z;
- case OP_JBE:
- return PFO_BE;
- case OP_JS:
- return PFO_S;
- case OP_JP:
- return PFO_P;
- case OP_JL:
- return PFO_L;
- case OP_JLE:
- return PFO_LE;
-
- case OP_JNO:
- *is_inv = 1;
- return PFO_O;
- case OP_JNC:
- *is_inv = 1;
- return PFO_C;
- case OP_JNZ:
- *is_inv = 1;
- return PFO_Z;
- case OP_JA:
- *is_inv = 1;
- return PFO_BE;
- case OP_JNS:
- *is_inv = 1;
- return PFO_S;
- case OP_JNP:
- *is_inv = 1;
- return PFO_P;
- case OP_JGE:
- *is_inv = 1;
- return PFO_L;
- case OP_JG:
- *is_inv = 1;
- return PFO_LE;
+ const char *cast = NULL;
+ char tmp[256];
- case OP_ADC:
- case OP_SBB:
- return PFO_C;
+ switch (popr->type) {
+ case OPT_REG:
+ if (popr->reg < xST0 || popr->reg > xST7)
+ ferr(po, "bad reg: %d\n", popr->reg);
+
+ snprintf(buf, buf_size, "f_st%d", popr->reg - xST0);
+ break;
+
+ case OPT_REGMEM:
+ case OPT_LABEL:
+ case OPT_OFFSET:
+ switch (popr->lmod) {
+ case OPLM_QWORD:
+ cast = "double";
+ break;
+ case OPLM_DWORD:
+ cast = "float";
+ break;
+ default:
+ ferr(po, "unhandled lmod: %d\n", popr->lmod);
+ break;
+ }
+ out_src_opr(tmp, sizeof(tmp), po, popr, "", 1);
+ snprintf(buf, buf_size, "*((%s *)%s)", cast, tmp);
+ break;
default:
- ferr(po, "split_cond: bad op %d\n", op);
- return -1;
+ ferr(po, "invalid float type: %d\n", popr->type);
}
+
+ return buf;
+}
+
+static char *out_dst_opr_float(char *buf, size_t buf_size,
+ struct parsed_op *po, struct parsed_opr *popr)
+{
+ // same?
+ return out_src_opr_float(buf, buf_size, po, popr);
}
static void out_test_for_cc(char *buf, size_t buf_size,
char buf1[256], buf2[256];
enum opr_lenmod lmod;
- if (po->operand[0].lmod != po->operand[1].lmod)
+ if (po->op != OP_DEC && po->operand[0].lmod != po->operand[1].lmod)
ferr(po, "%s: lmod mismatch: %d %d\n", __func__,
po->operand[0].lmod, po->operand[1].lmod);
lmod = po->operand[0].lmod;
}
out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], cast_use, 0);
- out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_use, 0);
+ if (po->op == OP_DEC)
+ snprintf(buf2, sizeof(buf2), "1");
+ else
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_use, 0);
switch (pfo) {
case PFO_C:
buf1, is_inv ? ">=" : "<", buf2);
break;
- case PFO_LE:
+ case PFO_LE: // !g
snprintf(buf, buf_size, "(%s %s %s)",
buf1, is_inv ? ">" : "<=", buf2);
break;
}
}
-static void op_set_clear_flag(struct parsed_op *po,
- enum op_flags flag_set, enum op_flags flag_clear)
-{
- po->flags |= flag_set;
- po->flags &= ~flag_clear;
-}
-
// last op in stream - unconditional branch or ret
#define LAST_OP(_i) ((ops[_i].flags & OPF_TAIL) \
- || (ops[_i].flags & (OPF_JMP|OPF_CC)) == OPF_JMP)
+ || ((ops[_i].flags & (OPF_JMP|OPF_CJMP|OPF_RMD)) == OPF_JMP \
+ && ops[_i].op != OP_CALL))
-static int scan_for_pop(int i, int opcnt, const char *reg,
- int magic, int depth, int *maxdepth, int do_flags)
+#define check_i(po, i) \
+ if ((i) < 0) \
+ ferr(po, "bad " #i ": %d\n", i)
+
+// note: this skips over calls and rm'd stuff assuming they're handled
+// so it's intended to use at one of final passes
+static int scan_for_pop(int i, int opcnt, int magic, int reg,
+ int depth, int flags_set)
{
- const struct parsed_proto *pp;
struct parsed_op *po;
+ int relevant;
int ret = 0;
int j;
for (; i < opcnt; i++) {
po = &ops[i];
if (po->cc_scratch == magic)
- break; // already checked
+ return ret; // already checked
po->cc_scratch = magic;
if (po->flags & OPF_TAIL) {
if (po->op == OP_CALL) {
- pp = proto_parse(g_fhdr, po->operand[0].name, 0);
- if (pp != NULL && pp->is_noreturn)
- // no stack cleanup for noreturn
- return ret;
+ if (po->pp != NULL && po->pp->is_noreturn)
+ // assume no stack cleanup for noreturn
+ return 1;
}
return -1; // deadend
}
- if ((po->flags & OPF_RMD)
- || (po->op == OP_PUSH && po->argnum != 0)) // arg push
+ if (po->flags & (OPF_RMD|OPF_DONE|OPF_FARG))
continue;
if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
if (po->btj != NULL) {
// jumptable
for (j = 0; j < po->btj->count; j++) {
- ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, reg, magic,
- depth, maxdepth, do_flags);
+ check_i(po, po->btj->d[j].bt_i);
+ ret |= scan_for_pop(po->btj->d[j].bt_i, opcnt, magic, reg,
+ depth, flags_set);
if (ret < 0)
return ret; // dead end
}
return ret;
}
- if (po->bt_i < 0) {
- ferr(po, "dead branch\n");
- return -1;
- }
-
- if (po->flags & OPF_CC) {
- ret |= scan_for_pop(po->bt_i, opcnt, reg, magic,
- depth, maxdepth, do_flags);
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP) {
+ ret |= scan_for_pop(po->bt_i, opcnt, magic, reg,
+ depth, flags_set);
if (ret < 0)
return ret; // dead end
}
continue;
}
+ relevant = 0;
if ((po->op == OP_POP || po->op == OP_PUSH)
- && po->operand[0].type == OPT_REG
- && IS(po->operand[0].name, reg))
+ && po->operand[0].type == OPT_REG && po->operand[0].reg == reg)
{
- if (po->op == OP_PUSH && !(po->flags & OPF_FARG)) {
- depth++;
- if (depth > *maxdepth)
- *maxdepth = depth;
- if (do_flags)
- op_set_clear_flag(po, OPF_RSAVE, OPF_RMD);
- }
- else if (po->op == OP_POP) {
- if (depth == 0) {
- if (do_flags)
- op_set_clear_flag(po, OPF_RMD, OPF_RSAVE);
- return 1;
- }
- else {
- depth--;
- if (depth < 0) // should not happen
- ferr(po, "fail with depth\n");
- if (do_flags)
- op_set_clear_flag(po, OPF_RSAVE, OPF_RMD);
- }
+ relevant = 1;
+ }
+
+ if (po->op == OP_PUSH) {
+ depth++;
+ }
+ else if (po->op == OP_POP) {
+ if (relevant && depth == 0) {
+ po->flags |= flags_set;
+ return 1;
}
+ depth--;
}
}
- return ret;
+ return -1;
}
-// scan for pop starting from 'ret' op (all paths)
-static int scan_for_pop_ret(int i, int opcnt, const char *reg,
- int flag_set)
+// scan for 'reg' pop backwards starting from i
+// intended to use for register restore search, so other reg
+// references are considered an error
+static int scan_for_rsave_pop_reg(int i, int magic, int reg, int set_flags)
{
- int found = 0;
- int j;
-
- for (; i < opcnt; i++) {
- if (!(ops[i].flags & OPF_TAIL))
- continue;
+ struct parsed_op *po;
+ struct label_ref *lr;
+ int ret = 0;
- for (j = i - 1; j >= 0; j--) {
- if (ops[j].flags & OPF_RMD)
- continue;
- if (ops[j].flags & OPF_JMP)
- return -1;
+ ops[i].cc_scratch = magic;
- if (ops[j].op == OP_POP && ops[j].operand[0].type == OPT_REG
- && IS(ops[j].operand[0].name, reg))
- {
- found = 1;
- ops[j].flags |= flag_set;
- break;
+ while (1)
+ {
+ if (g_labels[i] != NULL) {
+ lr = &g_label_refs[i];
+ for (; lr != NULL; lr = lr->next) {
+ check_i(&ops[i], lr->i);
+ ret |= scan_for_rsave_pop_reg(lr->i, magic, reg, set_flags);
+ if (ret < 0)
+ return ret;
}
+ if (i > 0 && LAST_OP(i - 1))
+ return ret;
+ }
- if (g_labels[j][0] != 0)
+ i--;
+ if (i < 0)
+ break;
+
+ if (ops[i].cc_scratch == magic)
+ return ret;
+ ops[i].cc_scratch = magic;
+
+ po = &ops[i];
+ if (po->op == OP_POP && po->operand[0].reg == reg) {
+ if (po->flags & (OPF_RMD|OPF_DONE))
return -1;
+
+ po->flags |= set_flags;
+ return 1;
}
+
+ // this also covers the case where we reach corresponding push
+ if ((po->regmask_dst | po->regmask_src) & (1 << reg))
+ return -1;
}
- return found ? 0 : -1;
+ // nothing interesting on this path
+ return 0;
}
-static void scan_propagate_df(int i, int opcnt)
+static void find_reachable_exits(int i, int opcnt, int magic,
+ int *exits, int *exit_count)
{
- struct parsed_op *po = &ops[i];
+ struct parsed_op *po;
int j;
- for (; i < opcnt; i++) {
+ for (; i < opcnt; i++)
+ {
po = &ops[i];
- if (po->flags & OPF_DF)
- return; // already resolved
- po->flags |= OPF_DF;
+ if (po->cc_scratch == magic)
+ return;
+ po->cc_scratch = magic;
- if (po->op == OP_CALL)
+ if (po->flags & OPF_TAIL) {
+ ferr_assert(po, *exit_count < MAX_EXITS);
+ exits[*exit_count] = i;
+ (*exit_count)++;
+ return;
+ }
+
+ if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->btj != NULL) {
+ for (j = 0; j < po->btj->count; j++) {
+ check_i(po, po->btj->d[j].bt_i);
+ find_reachable_exits(po->btj->d[j].bt_i, opcnt, magic,
+ exits, exit_count);
+ }
+ return;
+ }
+
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP)
+ find_reachable_exits(po->bt_i, opcnt, magic, exits, exit_count);
+ else
+ i = po->bt_i - 1;
+ continue;
+ }
+ }
+}
+
+// scan for 'reg' pop backwards starting from exits (all paths)
+static int scan_for_pop_ret(int i, int opcnt, int reg, int set_flags)
+{
+ static int exits[MAX_EXITS];
+ static int exit_count;
+ int j, ret;
+
+ if (!set_flags) {
+ exit_count = 0;
+ find_reachable_exits(i, opcnt, i + opcnt * 15, exits,
+ &exit_count);
+ ferr_assert(&ops[i], exit_count > 0);
+ }
+
+ for (j = 0; j < exit_count; j++) {
+ ret = scan_for_rsave_pop_reg(exits[j], i + opcnt * 16 + set_flags,
+ reg, set_flags);
+ if (ret == -1)
+ return -1;
+ }
+
+ return 1;
+}
+
+// scan for one or more pop of push <const>
+static int scan_for_pop_const_r(int i, int opcnt, int magic,
+ int push_i, int is_probe)
+{
+ struct parsed_op *po;
+ struct label_ref *lr;
+ int ret = 0;
+ int j;
+
+ for (; i < opcnt; i++)
+ {
+ po = &ops[i];
+ if (po->cc_scratch == magic)
+ return ret; // already checked
+ po->cc_scratch = magic;
+
+ if (po->flags & OPF_JMP) {
+ if (po->flags & OPF_RMD)
+ continue;
+ if (po->op == OP_CALL)
+ return -1;
+
+ if (po->btj != NULL) {
+ for (j = 0; j < po->btj->count; j++) {
+ check_i(po, po->btj->d[j].bt_i);
+ ret |= scan_for_pop_const_r(po->btj->d[j].bt_i, opcnt, magic,
+ push_i, is_probe);
+ if (ret < 0)
+ return ret;
+ }
+ return ret;
+ }
+
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP) {
+ ret |= scan_for_pop_const_r(po->bt_i, opcnt, magic, push_i,
+ is_probe);
+ if (ret < 0)
+ return ret;
+ }
+ else {
+ i = po->bt_i - 1;
+ }
+ continue;
+ }
+
+ if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_PUSH)
+ return -1;
+
+ if (g_labels[i] != NULL) {
+ // all refs must be visited
+ lr = &g_label_refs[i];
+ for (; lr != NULL; lr = lr->next) {
+ check_i(po, lr->i);
+ if (ops[lr->i].cc_scratch != magic)
+ return -1;
+ }
+ if (i > 0 && !LAST_OP(i - 1) && ops[i - 1].cc_scratch != magic)
+ return -1;
+ }
+
+ if (po->op == OP_POP)
+ {
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ return -1;
+
+ if (!is_probe) {
+ po->flags |= OPF_DONE;
+ po->datap = &ops[push_i];
+ }
+ return 1;
+ }
+ }
+
+ return -1;
+}
+
+static void scan_for_pop_const(int i, int opcnt, int magic)
+{
+ int ret;
+
+ ret = scan_for_pop_const_r(i + 1, opcnt, magic, i, 1);
+ if (ret == 1) {
+ ops[i].flags |= OPF_RMD | OPF_DONE;
+ scan_for_pop_const_r(i + 1, opcnt, magic + 1, i, 0);
+ }
+}
+
+// check if all branch targets within a marked path are also marked
+// note: the path checked must not be empty or end with a branch
+static int check_path_branches(int opcnt, int magic)
+{
+ struct parsed_op *po;
+ int i, j;
+
+ for (i = 0; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->cc_scratch != magic)
+ continue;
+
+ if (po->flags & OPF_JMP) {
+ if ((po->flags & OPF_RMD) || po->op == OP_CALL)
+ continue;
+
+ if (po->btj != NULL) {
+ for (j = 0; j < po->btj->count; j++) {
+ check_i(po, po->btj->d[j].bt_i);
+ if (ops[po->btj->d[j].bt_i].cc_scratch != magic)
+ return 0;
+ }
+ }
+
+ check_i(po, po->bt_i);
+ if (ops[po->bt_i].cc_scratch != magic)
+ return 0;
+ if ((po->flags & OPF_CJMP) && ops[i + 1].cc_scratch != magic)
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+// scan for multiple pushes for given pop
+static int scan_pushes_for_pop_r(int i, int magic, int pop_i,
+ int is_probe)
+{
+ int reg = ops[pop_i].operand[0].reg;
+ struct parsed_op *po;
+ struct label_ref *lr;
+ int ret = 0;
+
+ ops[i].cc_scratch = magic;
+
+ while (1)
+ {
+ if (g_labels[i] != NULL) {
+ lr = &g_label_refs[i];
+ for (; lr != NULL; lr = lr->next) {
+ check_i(&ops[i], lr->i);
+ ret |= scan_pushes_for_pop_r(lr->i, magic, pop_i, is_probe);
+ if (ret < 0)
+ return ret;
+ }
+ if (i > 0 && LAST_OP(i - 1))
+ return ret;
+ }
+
+ i--;
+ if (i < 0)
+ break;
+
+ if (ops[i].cc_scratch == magic)
+ return ret;
+ ops[i].cc_scratch = magic;
+
+ po = &ops[i];
+ if (po->op == OP_CALL)
+ return -1;
+ if ((po->flags & (OPF_TAIL|OPF_RSAVE)) || po->op == OP_POP)
+ return -1;
+
+ if (po->op == OP_PUSH)
+ {
+ if (po->datap != NULL)
+ return -1;
+ if (po->operand[0].type == OPT_REG && po->operand[0].reg == reg)
+ // leave this case for reg save/restore handlers
+ return -1;
+
+ if (!is_probe) {
+ po->flags |= OPF_PPUSH | OPF_DONE;
+ po->datap = &ops[pop_i];
+ }
+ return 1;
+ }
+ }
+
+ return -1;
+}
+
+static void scan_pushes_for_pop(int i, int opcnt, int *regmask_pp)
+{
+ int magic = i + opcnt * 14;
+ int ret;
+
+ ret = scan_pushes_for_pop_r(i, magic, i, 1);
+ if (ret == 1) {
+ ret = check_path_branches(opcnt, magic);
+ if (ret == 1) {
+ ops[i].flags |= OPF_PPUSH | OPF_DONE;
+ *regmask_pp |= 1 << ops[i].operand[0].reg;
+ scan_pushes_for_pop_r(i, magic + 1, i, 0);
+ }
+ }
+}
+
+static void scan_propagate_df(int i, int opcnt)
+{
+ struct parsed_op *po = &ops[i];
+ int j;
+
+ for (; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->flags & OPF_DF)
+ return; // already resolved
+ po->flags |= OPF_DF;
+
+ if (po->op == OP_CALL)
ferr(po, "call with DF set?\n");
if (po->flags & OPF_JMP) {
if (po->btj != NULL) {
// jumptable
- for (j = 0; j < po->btj->count; j++)
+ for (j = 0; j < po->btj->count; j++) {
+ check_i(po, po->btj->d[j].bt_i);
scan_propagate_df(po->btj->d[j].bt_i, opcnt);
+ }
return;
}
- if (po->bt_i < 0) {
- ferr(po, "dead branch\n");
- return;
- }
-
- if (po->flags & OPF_CC)
+ if (po->flags & OPF_RMD)
+ continue;
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP)
scan_propagate_df(po->bt_i, opcnt);
else
i = po->bt_i - 1;
break;
if (po->op == OP_CLD) {
- po->flags |= OPF_RMD;
+ po->flags |= OPF_RMD | OPF_DONE;
return;
}
}
ferr(po, "missing DF clear?\n");
}
+// is operand 'opr' referenced by parsed_op 'po'?
+static int is_opr_referenced(const struct parsed_opr *opr,
+ const struct parsed_op *po)
+{
+ int i, mask;
+
+ if (opr->type == OPT_REG) {
+ mask = po->regmask_dst | po->regmask_src;
+ if (po->op == OP_CALL)
+ mask |= (1 << xAX) | (1 << xCX) | (1 << xDX);
+ if ((1 << opr->reg) & mask)
+ return 1;
+ else
+ return 0;
+ }
+
+ for (i = 0; i < po->operand_cnt; i++)
+ if (IS(po->operand[0].name, opr->name))
+ return 1;
+
+ return 0;
+}
+
+// is operand 'opr' read by parsed_op 'po'?
+static int is_opr_read(const struct parsed_opr *opr,
+ const struct parsed_op *po)
+{
+ if (opr->type == OPT_REG) {
+ if (po->regmask_src & (1 << opr->reg))
+ return 1;
+ else
+ return 0;
+ }
+
+ // yes I'm lazy
+ return 0;
+}
+
// is operand 'opr' modified by parsed_op 'po'?
static int is_opr_modified(const struct parsed_opr *opr,
const struct parsed_op *po)
{
int mask;
- if ((po->flags & OPF_RMD) || !(po->flags & OPF_DATA))
- return 0;
-
if (opr->type == OPT_REG) {
if (po->op == OP_CALL) {
- mask = (1 << xAX) | (1 << xCX) | (1 << xDX);
- if ((1 << opr->reg) & mask)
+ mask = po->regmask_dst;
+ mask |= (1 << xAX) | (1 << xCX) | (1 << xDX); // ?
+ if (mask & (1 << opr->reg))
return 1;
else
return 0;
}
- if (po->operand[0].type == OPT_REG) {
- if (po->regmask_dst & (1 << opr->reg))
- return 1;
- else
- return 0;
- }
+ if (po->regmask_dst & (1 << opr->reg))
+ return 1;
+ else
+ return 0;
}
return IS(po->operand[0].name, opr->name);
while (i >= 0) {
if (ops[i].cc_scratch == magic) {
- ferr(&ops[i], "%s looped\n", __func__);
- return -1;
+ // is this a problem?
+ //ferr(&ops[i], "%s looped\n", __func__);
+ return 0;
}
ops[i].cc_scratch = magic;
- if (g_labels[i][0] != 0) {
+ if (g_labels[i] != NULL) {
*branched = 1;
lr = &g_label_refs[i];
for (; lr->next; lr = lr->next) {
+ check_i(&ops[i], lr->i);
ret = scan_for_flag_set(lr->i, magic,
branched, setters, setter_cnt);
if (ret < 0)
return ret;
}
+ check_i(&ops[i], lr->i);
if (i > 0 && LAST_OP(i - 1)) {
i = lr->i;
continue;
return 0;
}
- if ((ops[i].flags & OPF_JMP) && !(ops[i].flags & OPF_CC))
+ if ((ops[i].flags & (OPF_JMP|OPF_CJMP)) == OPF_JMP)
return -1;
}
static int scan_for_cdq_edx(int i)
{
while (i >= 0) {
- if (g_labels[i][0] != 0) {
+ if (g_labels[i] != NULL) {
if (g_label_refs[i].next != NULL)
return -1;
if (i > 0 && LAST_OP(i - 1)) {
static int scan_for_reg_clear(int i, int reg)
{
while (i >= 0) {
- if (g_labels[i][0] != 0) {
+ if (g_labels[i] != NULL) {
if (g_label_refs[i].next != NULL)
return -1;
if (i > 0 && LAST_OP(i - 1)) {
return -1;
}
+static void patch_esp_adjust(struct parsed_op *po, int adj)
+{
+ ferr_assert(po, po->op == OP_ADD);
+ ferr_assert(po, IS(opr_name(po, 0), "esp"));
+ ferr_assert(po, po->operand[1].type == OPT_CONST);
+
+ // this is a bit of a hack, but deals with use of
+ // single adj for multiple calls
+ po->operand[1].val -= adj;
+ po->flags |= OPF_RMD;
+ if (po->operand[1].val == 0)
+ po->flags |= OPF_DONE;
+ ferr_assert(po, (int)po->operand[1].val >= 0);
+}
+
// scan for positive, constant esp adjust
-static int scan_for_esp_adjust(int i, int opcnt, int *adj)
+// multipath case is preliminary
+static int scan_for_esp_adjust(int i, int opcnt,
+ int adj_expect, int *adj, int *is_multipath, int do_update)
{
- const struct parsed_proto *pp;
+ int adj_expect_unknown = 0;
struct parsed_op *po;
int first_pop = -1;
- *adj = 0;
+ int adj_best = 0;
- for (; i < opcnt; i++) {
- po = &ops[i];
+ *adj = *is_multipath = 0;
+ if (adj_expect < 0) {
+ adj_expect_unknown = 1;
+ adj_expect = 32 * 4; // enough?
+ }
- if (g_labels[i][0] != 0)
- break;
+ for (; i < opcnt && *adj < adj_expect; i++) {
+ if (g_labels[i] != NULL)
+ *is_multipath = 1;
+
+ po = &ops[i];
+ if (po->flags & OPF_DONE)
+ continue;
if (po->op == OP_ADD && po->operand[0].reg == xSP) {
if (po->operand[1].type != OPT_CONST)
*adj += po->operand[1].val;
if (*adj & 3)
ferr(&ops[i], "unaligned esp adjust: %x\n", *adj);
+ if (do_update) {
+ if (!*is_multipath)
+ patch_esp_adjust(po, adj_expect);
+ else
+ po->flags |= OPF_RMD;
+ }
return i;
}
else if (po->op == OP_PUSH) {
- if (first_pop == -1)
- first_pop = -2; // none
+ //if (first_pop == -1)
+ // first_pop = -2; // none
*adj -= lmod_bytes(po, po->operand[0].lmod);
}
else if (po->op == OP_POP) {
- if (first_pop == -1)
- first_pop = i;
+ if (!(po->flags & OPF_DONE)) {
+ // seems like msvc only uses 'pop ecx' for stack realignment..
+ if (po->operand[0].type != OPT_REG || po->operand[0].reg != xCX)
+ break;
+ if (first_pop == -1 && *adj >= 0)
+ first_pop = i;
+ }
+ if (do_update && *adj >= 0) {
+ po->flags |= OPF_RMD;
+ if (!*is_multipath)
+ po->flags |= OPF_DONE | OPF_NOREGS;
+ }
+
*adj += lmod_bytes(po, po->operand[0].lmod);
+ if (*adj > adj_best)
+ adj_best = *adj;
}
else if (po->flags & (OPF_JMP|OPF_TAIL)) {
+ if (po->op == OP_JMP && po->btj == NULL) {
+ if (po->bt_i <= i)
+ break;
+ i = po->bt_i - 1;
+ continue;
+ }
if (po->op != OP_CALL)
break;
if (po->operand[0].type != OPT_LABEL)
break;
- pp = po->datap;
- if (pp != NULL && pp->is_stdcall)
+ if (po->pp != NULL && po->pp->is_stdcall)
+ break;
+ if (adj_expect_unknown && first_pop >= 0)
break;
+ // assume it's another cdecl call
}
}
- if (*adj <= 8 && first_pop >= 0 && ops[first_pop].op == OP_POP
- && ops[first_pop].operand[0].type == OPT_REG
- && ops[first_pop].operand[0].reg == xCX)
- {
- // probably 'pop ecx' was used..
+ if (first_pop >= 0) {
+ // probably only 'pop ecx' was used
+ *adj = adj_best;
return first_pop;
}
}
scan_fwd_set_flags(po->bt_i, opcnt, magic, flags);
- if (!(po->flags & OPF_CC))
+ if (!(po->flags & OPF_CJMP))
return;
}
if (po->flags & OPF_TAIL)
int stack_ra = 0;
int offset = 0;
+ if (g_header_mode)
+ return NULL;
+
parse_stack_access(po, opr->name, ofs_reg,
- &offset, &stack_ra, NULL);
+ &offset, &stack_ra, NULL, 0);
if (ofs_reg[0] != 0)
ferr(po, "offset reg on arg access?\n");
if (offset <= stack_ra) {
p = strchr(opr->name + 1, '[');
memcpy(buf, opr->name, p - opr->name);
buf[p - opr->name] = 0;
- pp = proto_parse(g_fhdr, buf, 0);
+ pp = proto_parse(g_fhdr, buf, g_quiet_pp);
}
else if (opr->type == OPT_OFFSET || opr->type == OPT_LABEL) {
- pp = proto_parse(g_fhdr, opr->name, 0);
- if (pp == NULL)
- ferr(po, "proto_parse failed for icall from '%s'\n", opr->name);
- check_func_pp(po, pp, "reg-fptr ref");
+ pp = proto_parse(g_fhdr, opr->name, g_quiet_pp);
+ if (pp == NULL) {
+ if (!g_header_mode)
+ ferr(po, "proto_parse failed for icall to '%s'\n", opr->name);
+ }
+ else
+ check_func_pp(po, pp, "reg-fptr ref");
}
return pp;
}
static void scan_for_call_type(int i, const struct parsed_opr *opr,
- int magic, const struct parsed_proto **pp_found, int *multi)
+ int magic, const struct parsed_proto **pp_found, int *pp_i,
+ int *multi)
{
const struct parsed_proto *pp = NULL;
struct parsed_op *po;
struct label_ref *lr;
- while (i >= 0) {
- if (ops[i].cc_scratch == magic)
- return;
- ops[i].cc_scratch = magic;
+ ops[i].cc_scratch = magic;
- if (g_labels[i][0] != 0) {
+ while (1) {
+ if (g_labels[i] != NULL) {
lr = &g_label_refs[i];
- for (; lr != NULL; lr = lr->next)
- scan_for_call_type(lr->i, opr, magic, pp_found, multi);
+ for (; lr != NULL; lr = lr->next) {
+ check_i(&ops[i], lr->i);
+ scan_for_call_type(lr->i, opr, magic, pp_found, pp_i, multi);
+ }
if (i > 0 && LAST_OP(i - 1))
return;
}
+
i--;
+ if (i < 0)
+ break;
+
+ if (ops[i].cc_scratch == magic)
+ return;
+ ops[i].cc_scratch = magic;
if (!(ops[i].flags & OPF_DATA))
continue;
if (i < 0) {
// reached the top - can only be an arg-reg
- if (opr->type != OPT_REG)
+ if (opr->type != OPT_REG || g_func_pp == NULL)
return;
for (i = 0; i < g_func_pp->argc; i++) {
}
*multi = 1;
}
- if (pp != NULL)
+ if (pp != NULL) {
*pp_found = pp;
+ *pp_i = po - ops;
+ }
}
-static const struct parsed_proto *resolve_icall(int i, int opcnt,
- int *multi_src)
+static void add_label_ref(struct label_ref *lr, int op_i)
{
- const struct parsed_proto *pp = NULL;
- int search_advice = 0;
-
- *multi_src = 0;
+ struct label_ref *lr_new;
- switch (ops[i].operand[0].type) {
- case OPT_REGMEM:
- case OPT_LABEL:
- case OPT_OFFSET:
- pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice);
- if (!search_advice)
- break;
- // fallthrough
- default:
- scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp,
- multi_src);
- break;
+ if (lr->i == -1) {
+ lr->i = op_i;
+ return;
}
- return pp;
+ lr_new = calloc(1, sizeof(*lr_new));
+ lr_new->i = op_i;
+ lr_new->next = lr->next;
+ lr->next = lr_new;
}
-static int collect_call_args_r(struct parsed_op *po, int i,
- struct parsed_proto *pp, int *regmask, int *save_arg_vars, int arg,
- int magic, int need_op_saving, int may_reuse)
+static struct parsed_data *try_resolve_jumptab(int i, int opcnt)
{
- struct parsed_proto *pp_tmp;
- struct label_ref *lr;
- int need_to_save_current;
- int ret = 0;
- int j;
-
- if (i < 0) {
- ferr(po, "dead label encountered\n");
- return -1;
- }
-
- for (; arg < pp->argc; arg++)
- if (pp->arg[arg].reg == NULL)
- break;
- magic = (magic & 0xffffff) | (arg << 24);
-
- for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); )
- {
- if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) {
- if (ops[j].cc_scratch != magic) {
- ferr(&ops[j], "arg collect hit same path with diff args for %s\n",
- pp->name);
- return -1;
- }
- // ok: have already been here
- return 0;
- }
- ops[j].cc_scratch = magic;
-
- if (g_labels[j][0] != 0 && g_label_refs[j].i != -1) {
- lr = &g_label_refs[j];
- if (lr->next != NULL)
- need_op_saving = 1;
- for (; lr->next; lr = lr->next) {
- if ((ops[lr->i].flags & (OPF_JMP|OPF_CC)) != OPF_JMP)
- may_reuse = 1;
- ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
- arg, magic, need_op_saving, may_reuse);
- if (ret < 0)
- return ret;
- }
-
- if ((ops[lr->i].flags & (OPF_JMP|OPF_CC)) != OPF_JMP)
- may_reuse = 1;
- if (j > 0 && LAST_OP(j - 1)) {
- // follow last branch in reverse
- j = lr->i;
- continue;
- }
- need_op_saving = 1;
- ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
- arg, magic, need_op_saving, may_reuse);
- if (ret < 0)
- return ret;
- }
- j--;
+ struct parsed_op *po = &ops[i];
+ struct parsed_data *pd;
+ char label[NAMELEN], *p;
+ int len, j, l;
- if (ops[j].op == OP_CALL)
- {
- if (pp->is_unresolved)
- break;
+ p = strchr(po->operand[0].name, '[');
+ if (p == NULL)
+ return NULL;
- pp_tmp = ops[j].datap;
- if (pp_tmp == NULL)
- ferr(po, "arg collect hit unparsed call '%s'\n",
- ops[j].operand[0].name);
- if (may_reuse && pp_tmp->argc_stack > 0)
- ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n",
- arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack);
- }
- else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP) {
- if (pp->is_unresolved)
- break;
+ len = p - po->operand[0].name;
+ strncpy(label, po->operand[0].name, len);
+ label[len] = 0;
- ferr(po, "arg collect %d/%d hit esp adjust\n",
- arg, pp->argc);
+ for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) {
+ if (IS(g_func_pd[j].label, label)) {
+ pd = &g_func_pd[j];
+ break;
}
- else if (ops[j].op == OP_POP) {
- if (pp->is_unresolved)
- break;
+ }
+ if (pd == NULL)
+ //ferr(po, "label '%s' not parsed?\n", label);
+ return NULL;
- ferr(po, "arg collect %d/%d hit pop\n", arg, pp->argc);
- }
- else if ((ops[j].flags & (OPF_JMP|OPF_CC)) == (OPF_JMP|OPF_CC))
- {
- if (pp->is_unresolved)
- break;
+ if (pd->type != OPT_OFFSET)
+ ferr(po, "label '%s' with non-offset data?\n", label);
- may_reuse = 1;
- }
- else if (ops[j].op == OP_PUSH && !(ops[j].flags & OPF_FARG))
- {
- if (pp->is_unresolved && (ops[j].flags & OPF_RMD))
+ // find all labels, link
+ for (j = 0; j < pd->count; j++) {
+ for (l = 0; l < opcnt; l++) {
+ if (g_labels[l] != NULL && IS(g_labels[l], pd->d[j].u.label)) {
+ add_label_ref(&g_label_refs[l], i);
+ pd->d[j].bt_i = l;
break;
-
- pp->arg[arg].datap = &ops[j];
- need_to_save_current = 0;
- if (!need_op_saving) {
- ret = scan_for_mod(&ops[j], j + 1, i, 1);
- need_to_save_current = (ret >= 0);
- }
- if (need_op_saving || need_to_save_current) {
- // mark this push as one that needs operand saving
- ops[j].flags &= ~OPF_RMD;
- if (ops[j].argnum == 0) {
- ops[j].argnum = arg + 1;
- *save_arg_vars |= 1 << arg;
- }
- else if (ops[j].argnum < arg + 1)
- ferr(&ops[j], "argnum conflict (%d<%d) for '%s'\n",
- ops[j].argnum, arg + 1, pp->name);
- }
- else if (ops[j].argnum == 0)
- ops[j].flags |= OPF_RMD;
-
- // some PUSHes are reused by different calls on other branches,
- // but that can't happen if we didn't branch, so they
- // can be removed from future searches (handles nested calls)
- if (!may_reuse)
- ops[j].flags |= OPF_FARG;
-
- ops[j].flags &= ~OPF_RSAVE;
-
- arg++;
- if (!pp->is_unresolved) {
- // next arg
- for (; arg < pp->argc; arg++)
- if (pp->arg[arg].reg == NULL)
- break;
}
- magic = (magic & 0xffffff) | (arg << 24);
-
- // tracking reg usage
- if (ops[j].operand[0].type == OPT_REG)
- *regmask |= 1 << ops[j].operand[0].reg;
}
}
- if (arg < pp->argc) {
- ferr(po, "arg collect failed for '%s': %d/%d\n",
- pp->name, arg, pp->argc);
- return -1;
- }
-
- return arg;
-}
-
-static int collect_call_args(struct parsed_op *po, int i,
- struct parsed_proto *pp, int *regmask, int *save_arg_vars,
- int magic)
-{
- int ret;
- int a;
-
- ret = collect_call_args_r(po, i, pp, regmask, save_arg_vars,
- 0, magic, 0, 0);
- if (ret < 0)
- return ret;
-
- if (pp->is_unresolved) {
- pp->argc += ret;
- pp->argc_stack += ret;
- for (a = 0; a < pp->argc; a++)
- if (pp->arg[a].type.name == NULL)
- pp->arg[a].type.name = strdup("int");
- }
-
- return ret;
+ return pd;
}
-static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg)
+static void clear_labels(int count)
{
int i;
- for (i = 0; i < pp->argc; i++)
- if (pp->arg[i].reg == NULL)
- break;
-
- if (pp->argc_stack)
- memmove(&pp->arg[i + 1], &pp->arg[i],
- sizeof(pp->arg[0]) * pp->argc_stack);
- memset(&pp->arg[i], 0, sizeof(pp->arg[i]));
- pp->arg[i].reg = strdup(reg);
- pp->arg[i].type.name = strdup("int");
- pp->argc++;
- pp->argc_reg++;
+ for (i = 0; i < count; i++) {
+ if (g_labels[i] != NULL) {
+ free(g_labels[i]);
+ g_labels[i] = NULL;
+ }
+ }
}
-static void add_label_ref(struct label_ref *lr, int op_i)
+static int get_pp_arg_regmask_src(const struct parsed_proto *pp)
{
- struct label_ref *lr_new;
+ int regmask = 0;
+ int i, reg;
- if (lr->i == -1) {
- lr->i = op_i;
- return;
+ for (i = 0; i < pp->argc; i++) {
+ if (pp->arg[i].reg != NULL) {
+ reg = char_array_i(regs_r32,
+ ARRAY_SIZE(regs_r32), pp->arg[i].reg);
+ if (reg < 0)
+ ferr(ops, "arg '%s' of func '%s' is not a reg?\n",
+ pp->arg[i].reg, pp->name);
+ regmask |= 1 << reg;
+ }
}
- lr_new = calloc(1, sizeof(*lr_new));
- lr_new->i = op_i;
- lr_new->next = lr->next;
- lr->next = lr_new;
+ return regmask;
}
-static void output_std_flags(FILE *fout, struct parsed_op *po,
- int *pfomask, const char *dst_opr_text)
+static int get_pp_arg_regmask_dst(const struct parsed_proto *pp)
{
- if (*pfomask & (1 << PFO_Z)) {
- fprintf(fout, "\n cond_z = (%s%s == 0);",
- lmod_cast_u(po, po->operand[0].lmod), dst_opr_text);
- *pfomask &= ~(1 << PFO_Z);
+ int regmask = 0;
+ int i, reg;
+
+ if (pp->has_retreg) {
+ for (i = 0; i < pp->argc; i++) {
+ if (pp->arg[i].type.is_retreg) {
+ reg = char_array_i(regs_r32,
+ ARRAY_SIZE(regs_r32), pp->arg[i].reg);
+ ferr_assert(ops, reg >= 0);
+ regmask |= 1 << reg;
+ }
+ }
}
- if (*pfomask & (1 << PFO_S)) {
- fprintf(fout, "\n cond_s = (%s%s < 0);",
- lmod_cast_s(po, po->operand[0].lmod), dst_opr_text);
- *pfomask &= ~(1 << PFO_S);
+
+ if (strstr(pp->ret_type.name, "int64"))
+ return regmask | (1 << xAX) | (1 << xDX);
+ if (IS(pp->ret_type.name, "float")
+ || IS(pp->ret_type.name, "double"))
+ {
+ return regmask | mxST0;
}
-}
+ if (strcasecmp(pp->ret_type.name, "void") == 0)
+ return regmask;
-static void output_pp_attrs(FILE *fout, const struct parsed_proto *pp,
- int is_noreturn)
-{
- if (pp->is_fastcall)
- fprintf(fout, "__fastcall ");
- else if (pp->is_stdcall && pp->argc_reg == 0)
- fprintf(fout, "__stdcall ");
- if (pp->is_noreturn || is_noreturn)
- fprintf(fout, "noreturn ");
+ return regmask | mxAX;
}
-static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt)
+static void resolve_branches_parse_calls(int opcnt)
{
- struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op;
- struct parsed_opr *last_arith_dst = NULL;
- char buf1[256], buf2[256], buf3[256], cast[64];
+ static const struct {
+ const char *name;
+ enum op_op op;
+ unsigned int flags;
+ unsigned int regmask_src;
+ unsigned int regmask_dst;
+ } pseudo_ops[] = {
+ { "__ftol", OPP_FTOL, OPF_FPOP, mxST0, mxAX | mxDX },
+ };
const struct parsed_proto *pp_c;
- struct parsed_proto *pp, *pp_tmp;
+ struct parsed_proto *pp;
struct parsed_data *pd;
+ struct parsed_op *po;
const char *tmpname;
- enum parsed_flag_op pfo;
- int save_arg_vars = 0;
- int cmp_result_vars = 0;
- int need_mul_var = 0;
- int had_decl = 0;
- int label_pending = 0;
- int regmask_save = 0;
- int regmask_arg = 0;
- int regmask_now = 0;
- int regmask_init = 0;
- int regmask = 0;
- int pfomask = 0;
- int found = 0;
- int depth = 0;
- int no_output;
- int i, j, l;
- int dummy;
- int arg;
- int reg;
+ int i, l;
int ret;
- g_bp_frame = g_sp_frame = g_stack_fsz = 0;
- g_stack_frame_used = 0;
-
- g_func_pp = proto_parse(fhdr, funcn, 0);
- if (g_func_pp == NULL)
- ferr(ops, "proto_parse failed for '%s'\n", funcn);
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ po->bt_i = -1;
+ po->btj = NULL;
- fprintf(fout, "%s ", g_func_pp->ret_type.name);
- output_pp_attrs(fout, g_func_pp, g_ida_func_attr & IDAFA_NORETURN);
- fprintf(fout, "%s(", funcn);
+ if (po->datap != NULL) {
+ pp = calloc(1, sizeof(*pp));
+ my_assert_not(pp, NULL);
- for (i = 0; i < g_func_pp->argc; i++) {
- if (i > 0)
- fprintf(fout, ", ");
- if (g_func_pp->arg[i].fptr != NULL) {
- // func pointer..
- pp = g_func_pp->arg[i].fptr;
- fprintf(fout, "%s (", pp->ret_type.name);
- output_pp_attrs(fout, pp, 0);
- fprintf(fout, "*a%d)(", i + 1);
- for (j = 0; j < pp->argc; j++) {
- if (j > 0)
- fprintf(fout, ", ");
- if (pp->arg[j].fptr)
- ferr(ops, "nested fptr\n");
- fprintf(fout, "%s", pp->arg[j].type.name);
- }
- fprintf(fout, ")");
- }
- else {
- fprintf(fout, "%s a%d", g_func_pp->arg[i].type.name, i + 1);
+ ret = parse_protostr(po->datap, pp);
+ if (ret < 0)
+ ferr(po, "bad protostr supplied: %s\n", (char *)po->datap);
+ free(po->datap);
+ po->datap = NULL;
+ po->pp = pp;
}
- if (g_func_pp->arg[i].reg != NULL) {
- reg = char_array_i(regs_r32,
- ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg);
- if (reg < 0)
- ferr(ops, "arg '%s' is not a reg?\n", g_func_pp->arg[i].reg);
- regmask_arg |= 1 << reg;
+
+ if (po->op == OP_CALL) {
+ pp = NULL;
+
+ if (po->pp != NULL)
+ pp = po->pp;
+ else if (po->operand[0].type == OPT_LABEL)
+ {
+ tmpname = opr_name(po, 0);
+ if (IS_START(tmpname, "loc_"))
+ ferr(po, "call to loc_*\n");
+
+ // convert some calls to pseudo-ops
+ for (l = 0; l < ARRAY_SIZE(pseudo_ops); l++) {
+ if (!IS(tmpname, pseudo_ops[l].name))
+ continue;
+
+ po->op = pseudo_ops[l].op;
+ po->operand_cnt = 0;
+ po->regmask_src = pseudo_ops[l].regmask_src;
+ po->regmask_dst = pseudo_ops[l].regmask_dst;
+ po->flags = pseudo_ops[l].flags;
+ po->flags |= po->regmask_dst ? OPF_DATA : 0;
+ break;
+ }
+ if (l < ARRAY_SIZE(pseudo_ops))
+ continue;
+
+ pp_c = proto_parse(g_fhdr, tmpname, g_header_mode);
+ if (!g_header_mode && pp_c == NULL)
+ ferr(po, "proto_parse failed for call '%s'\n", tmpname);
+
+ if (pp_c != NULL) {
+ pp = proto_clone(pp_c);
+ my_assert_not(pp, NULL);
+ }
+ }
+
+ if (pp != NULL) {
+ if (pp->is_fptr)
+ check_func_pp(po, pp, "fptr var call");
+ if (pp->is_noreturn)
+ po->flags |= OPF_TAIL;
+ }
+ po->pp = pp;
+ continue;
}
+
+ if (!(po->flags & OPF_JMP) || po->op == OP_RET)
+ continue;
+
+ if (po->operand[0].type == OPT_REGMEM) {
+ pd = try_resolve_jumptab(i, opcnt);
+ if (pd == NULL)
+ goto tailcall;
+
+ po->btj = pd;
+ continue;
+ }
+
+ for (l = 0; l < opcnt; l++) {
+ if (g_labels[l] != NULL
+ && IS(po->operand[0].name, g_labels[l]))
+ {
+ if (l == i + 1 && po->op == OP_JMP) {
+ // yet another alignment type..
+ po->flags |= OPF_RMD|OPF_DONE;
+ break;
+ }
+ add_label_ref(&g_label_refs[l], i);
+ po->bt_i = l;
+ break;
+ }
+ }
+
+ if (po->bt_i != -1 || (po->flags & OPF_RMD))
+ continue;
+
+ if (po->operand[0].type == OPT_LABEL)
+ // assume tail call
+ goto tailcall;
+
+ ferr(po, "unhandled branch\n");
+
+tailcall:
+ po->op = OP_CALL;
+ po->flags |= OPF_TAIL;
+ if (i > 0 && ops[i - 1].op == OP_POP)
+ po->flags |= OPF_ATAIL;
+ i--; // reprocess
}
- if (g_func_pp->is_vararg) {
- if (i > 0)
- fprintf(fout, ", ");
- fprintf(fout, "...");
- }
+}
- fprintf(fout, ")\n{\n");
+static void scan_prologue_epilogue(int opcnt)
+{
+ int ecx_push = 0, esp_sub = 0;
+ int found;
+ int i, j, l;
- // pass1:
- // - handle ebp/esp frame, remove ops related to it
if (ops[0].op == OP_PUSH && IS(opr_name(&ops[0], 0), "ebp")
&& ops[1].op == OP_MOV
&& IS(opr_name(&ops[1], 0), "ebp")
&& IS(opr_name(&ops[1], 1), "esp"))
{
- int ecx_push = 0;
-
g_bp_frame = 1;
- ops[0].flags |= OPF_RMD;
- ops[1].flags |= OPF_RMD;
+ ops[0].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ ops[1].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
i = 2;
if (ops[2].op == OP_SUB && IS(opr_name(&ops[2], 0), "esp")) {
g_stack_fsz = opr_const(&ops[2], 1);
- ops[2].flags |= OPF_RMD;
+ ops[2].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
i++;
}
else {
i = 2;
while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) {
g_stack_fsz += 4;
- ops[i].flags |= OPF_RMD;
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
ecx_push++;
i++;
}
&& IS(opr_name(&ops[i + 1], 0), "__alloca_probe"))
{
g_stack_fsz += ops[i].operand[1].val;
- ops[i].flags |= OPF_RMD;
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
i++;
- ops[i].flags |= OPF_RMD;
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
i++;
}
}
found = 0;
do {
for (; i < opcnt; i++)
- if (ops[i].op == OP_RET)
+ if (ops[i].flags & OPF_TAIL)
break;
- if (i == opcnt && (ops[i - 1].flags & OPF_JMP) && found)
- break;
+ j = i - 1;
+ if (i == opcnt && (ops[j].flags & OPF_JMP)) {
+ if (ops[j].bt_i != -1 || ops[j].btj != NULL)
+ break;
+ i--;
+ j--;
+ }
- if ((ops[i - 1].op == OP_POP && IS(opr_name(&ops[i - 1], 0), "ebp"))
- || ops[i - 1].op == OP_LEAVE)
+ if ((ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp"))
+ || ops[j].op == OP_LEAVE)
+ {
+ ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ }
+ else if (ops[i].op == OP_CALL && ops[i].pp != NULL
+ && ops[i].pp->is_noreturn)
{
- ops[i - 1].flags |= OPF_RMD;
+ // on noreturn, msvc sometimes cleans stack, sometimes not
+ i++;
+ found = 1;
+ continue;
}
else if (!(g_ida_func_attr & IDAFA_NORETURN))
- ferr(&ops[i - 1], "'pop ebp' expected\n");
+ ferr(&ops[j], "'pop ebp' expected\n");
if (g_stack_fsz != 0) {
- if (ops[i - 2].op == OP_MOV
- && IS(opr_name(&ops[i - 2], 0), "esp")
- && IS(opr_name(&ops[i - 2], 1), "ebp"))
+ if (ops[j].op == OP_LEAVE)
+ j--;
+ else if (ops[j].op == OP_POP
+ && ops[j - 1].op == OP_MOV
+ && IS(opr_name(&ops[j - 1], 0), "esp")
+ && IS(opr_name(&ops[j - 1], 1), "ebp"))
{
- ops[i - 2].flags |= OPF_RMD;
+ ops[j - 1].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ j -= 2;
}
- else if (ops[i - 1].op != OP_LEAVE
- && !(g_ida_func_attr & IDAFA_NORETURN))
+ else if (!(g_ida_func_attr & IDAFA_NORETURN))
{
- ferr(&ops[i - 2], "esp restore expected\n");
+ ferr(&ops[j], "esp restore expected\n");
}
- if (ecx_push && ops[i - 3].op == OP_POP
- && IS(opr_name(&ops[i - 3], 0), "ecx"))
+ if (ecx_push && j >= 0 && ops[j].op == OP_POP
+ && IS(opr_name(&ops[j], 0), "ecx"))
{
- ferr(&ops[i - 3], "unexpected ecx pop\n");
+ ferr(&ops[j], "unexpected ecx pop\n");
}
}
found = 1;
i++;
} while (i < opcnt);
+
+ if (!found)
+ ferr(ops, "missing ebp epilogue\n");
+ return;
}
- else {
- for (i = 0; i < opcnt; i++) {
- if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL)))
- break;
- if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP
- && ops[i].operand[1].type == OPT_CONST)
- {
- g_sp_frame = 1;
- break;
- }
- }
- if (g_sp_frame)
+ // non-bp frame
+ i = 0;
+ while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) {
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ g_stack_fsz += 4;
+ ecx_push++;
+ i++;
+ }
+
+ for (; i < opcnt; i++) {
+ if (ops[i].op == OP_PUSH || (ops[i].flags & (OPF_JMP|OPF_TAIL)))
+ break;
+ if (ops[i].op == OP_SUB && ops[i].operand[0].reg == xSP
+ && ops[i].operand[1].type == OPT_CONST)
{
g_stack_fsz = ops[i].operand[1].val;
- ops[i].flags |= OPF_RMD;
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ esp_sub = 1;
+ break;
+ }
+ }
- i++;
- do {
- for (; i < opcnt; i++)
- if (ops[i].op == OP_RET)
- break;
- if (ops[i - 1].op != OP_ADD
- || !IS(opr_name(&ops[i - 1], 0), "esp")
- || ops[i - 1].operand[1].type != OPT_CONST
- || ops[i - 1].operand[1].val != g_stack_fsz)
- ferr(&ops[i - 1], "'add esp' expected\n");
- ops[i - 1].flags |= OPF_RMD;
+ if (ecx_push && !esp_sub) {
+ // could actually be args for a call..
+ for (; i < opcnt; i++)
+ if (ops[i].op != OP_PUSH)
+ break;
+
+ if (ops[i].op == OP_CALL && ops[i].operand[0].type == OPT_LABEL) {
+ const struct parsed_proto *pp;
+ pp = proto_parse(g_fhdr, opr_name(&ops[i], 0), 1);
+ j = pp ? pp->argc_stack : 0;
+ while (i > 0 && j > 0) {
+ i--;
+ if (ops[i].op == OP_PUSH) {
+ ops[i].flags &= ~(OPF_RMD | OPF_DONE | OPF_NOREGS);
+ j--;
+ }
+ }
+ if (j != 0)
+ ferr(&ops[i], "unhandled prologue\n");
+ // recheck
+ i = g_stack_fsz = ecx_push = 0;
+ while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) {
+ if (!(ops[i].flags & OPF_RMD))
+ break;
+ g_stack_fsz += 4;
+ ecx_push++;
i++;
- } while (i < opcnt);
+ }
}
}
- // pass2:
- // - parse calls with labels
- // - resolve all branches
- for (i = 0; i < opcnt; i++)
+ found = 0;
+ if (ecx_push || esp_sub)
{
- po = &ops[i];
- po->bt_i = -1;
- po->btj = NULL;
+ g_sp_frame = 1;
- if (po->flags & OPF_RMD)
- continue;
+ i++;
+ do {
+ for (; i < opcnt; i++)
+ if (ops[i].flags & OPF_TAIL)
+ break;
+ j = i - 1;
+ if (i == opcnt && (ops[j].flags & OPF_JMP)) {
+ if (ops[j].bt_i != -1 || ops[j].btj != NULL)
+ break;
+ i--;
+ j--;
+ }
- if (po->op == OP_CALL) {
- pp = NULL;
+ if (ecx_push > 0) {
+ for (l = 0; l < ecx_push; l++) {
+ if (ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ecx"))
+ /* pop ecx */;
+ else if (ops[j].op == OP_ADD
+ && IS(opr_name(&ops[j], 0), "esp")
+ && ops[j].operand[1].type == OPT_CONST)
+ {
+ /* add esp, N */
+ l += ops[j].operand[1].val / 4 - 1;
+ }
+ else
+ ferr(&ops[j], "'pop ecx' expected\n");
- if (po->operand[0].type == OPT_LABEL) {
- tmpname = opr_name(po, 0);
- if (IS_START(tmpname, "loc_"))
- ferr(po, "call to loc_*\n");
- pp_c = proto_parse(fhdr, tmpname, 0);
- if (pp_c == NULL)
- ferr(po, "proto_parse failed for call '%s'\n", tmpname);
+ ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ j--;
+ }
+ if (l != ecx_push)
+ ferr(&ops[j], "epilogue scan failed\n");
- pp = proto_clone(pp_c);
- my_assert_not(pp, NULL);
+ found = 1;
}
- else if (po->datap != NULL) {
- pp = calloc(1, sizeof(*pp));
- my_assert_not(pp, NULL);
- ret = parse_protostr(po->datap, pp);
- if (ret < 0)
- ferr(po, "bad protostr supplied: %s\n", (char *)po->datap);
- free(po->datap);
- po->datap = NULL;
- }
+ if (esp_sub) {
+ if (ops[j].op != OP_ADD
+ || !IS(opr_name(&ops[j], 0), "esp")
+ || ops[j].operand[1].type != OPT_CONST
+ || ops[j].operand[1].val != g_stack_fsz)
+ ferr(&ops[j], "'add esp' expected\n");
- if (pp != NULL) {
- if (pp->is_fptr)
- check_func_pp(po, pp, "fptr var call");
- if (pp->is_noreturn)
- po->flags |= OPF_TAIL;
- po->datap = pp;
+ ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ ops[j].operand[1].val = 0; // hack for stack arg scanner
+ found = 1;
}
- continue;
- }
- if (!(po->flags & OPF_JMP) || po->op == OP_RET)
- continue;
+ i++;
+ } while (i < opcnt);
- if (po->operand[0].type == OPT_REGMEM) {
- char *p = strchr(po->operand[0].name, '[');
- if (p == NULL)
- goto tailcall;
- ret = p - po->operand[0].name;
- strncpy(buf1, po->operand[0].name, ret);
- buf1[ret] = 0;
+ if (!found)
+ ferr(ops, "missing esp epilogue\n");
+ }
+}
- for (j = 0, pd = NULL; j < g_func_pd_cnt; j++) {
- if (IS(g_func_pd[j].label, buf1)) {
- pd = &g_func_pd[j];
- break;
- }
- }
- if (pd == NULL)
- //ferr(po, "label '%s' not parsed?\n", buf1);
- goto tailcall;
- if (pd->type != OPT_OFFSET)
- ferr(po, "label '%s' with non-offset data?\n", buf1);
+// find an instruction that changed opr before i op
+// *op_i must be set to -1 by the caller
+// *is_caller is set to 1 if one source is determined to be g_func arg
+// returns 1 if found, *op_i is then set to origin
+// returns -1 if multiple origins are found
+static int resolve_origin(int i, const struct parsed_opr *opr,
+ int magic, int *op_i, int *is_caller)
+{
+ struct label_ref *lr;
+ int ret = 0;
- // find all labels, link
- for (j = 0; j < pd->count; j++) {
- for (l = 0; l < opcnt; l++) {
- if (g_labels[l][0] && IS(g_labels[l], pd->d[j].u.label)) {
- add_label_ref(&g_label_refs[l], i);
- pd->d[j].bt_i = l;
- break;
- }
- }
- }
+ if (ops[i].cc_scratch == magic)
+ return 0;
+ ops[i].cc_scratch = magic;
- po->btj = pd;
- continue;
+ while (1) {
+ if (g_labels[i] != NULL) {
+ lr = &g_label_refs[i];
+ for (; lr != NULL; lr = lr->next) {
+ check_i(&ops[i], lr->i);
+ ret |= resolve_origin(lr->i, opr, magic, op_i, is_caller);
+ }
+ if (i > 0 && LAST_OP(i - 1))
+ return ret;
}
- for (l = 0; l < opcnt; l++) {
- if (g_labels[l][0] && IS(po->operand[0].name, g_labels[l])) {
- add_label_ref(&g_label_refs[l], i);
- po->bt_i = l;
- break;
- }
+ i--;
+ if (i < 0) {
+ if (is_caller != NULL)
+ *is_caller = 1;
+ return -1;
}
- if (po->bt_i != -1)
+ if (ops[i].cc_scratch == magic)
+ return ret;
+ ops[i].cc_scratch = magic;
+
+ if (!(ops[i].flags & OPF_DATA))
+ continue;
+ if (!is_opr_modified(opr, &ops[i]))
continue;
- if (po->operand[0].type == OPT_LABEL)
- // assume tail call
- goto tailcall;
+ if (*op_i >= 0) {
+ if (*op_i == i)
+ return ret | 1;
- ferr(po, "unhandled branch\n");
+ // XXX: could check if the other op does the same
+ return -1;
+ }
-tailcall:
- po->op = OP_CALL;
- po->flags |= OPF_TAIL;
- i--; // reprocess
+ *op_i = i;
+ return ret | 1;
}
+}
- // pass3:
- // - remove dead labels
- // - process calls
- for (i = 0; i < opcnt; i++)
- {
- if (g_labels[i][0] != 0 && g_label_refs[i].i == -1)
- g_labels[i][0] = 0;
+// find an instruction that previously referenced opr
+// if multiple results are found - fail
+// *op_i must be set to -1 by the caller
+// returns 1 if found, *op_i is then set to referencer insn
+static int resolve_last_ref(int i, const struct parsed_opr *opr,
+ int magic, int *op_i)
+{
+ struct label_ref *lr;
+ int ret = 0;
- po = &ops[i];
- if (po->flags & OPF_RMD)
- continue;
+ if (ops[i].cc_scratch == magic)
+ return 0;
+ ops[i].cc_scratch = magic;
- if (po->op == OP_CALL)
- {
- tmpname = opr_name(po, 0);
- pp = po->datap;
- if (pp == NULL)
- {
- // indirect call
- pp_c = resolve_icall(i, opcnt, &l);
- if (pp_c != NULL) {
- pp = proto_clone(pp_c);
- my_assert_not(pp, NULL);
- if (l)
- // not resolved just to single func
- pp->is_fptr = 1;
- }
- if (pp == NULL) {
- pp = calloc(1, sizeof(*pp));
- my_assert_not(pp, NULL);
- pp->is_fptr = 1;
- ret = scan_for_esp_adjust(i + 1, opcnt, &j);
- if (ret < 0) {
- if (!g_allow_regfunc)
- ferr(po, "non-__cdecl indirect call unhandled yet\n");
- pp->is_unresolved = 1;
- j = 0;
- }
- j /= 4;
- if (j > ARRAY_SIZE(pp->arg))
- ferr(po, "esp adjust too large: %d\n", j);
- pp->ret_type.name = strdup("int");
- pp->argc = pp->argc_stack = j;
- for (arg = 0; arg < pp->argc; arg++)
- pp->arg[arg].type.name = strdup("int");
- }
- po->datap = pp;
- }
-
- // look for and make use of esp adjust
- ret = -1;
- if (!pp->is_stdcall && pp->argc_stack > 0)
- ret = scan_for_esp_adjust(i + 1, opcnt, &j);
- if (ret >= 0) {
- if (pp->is_vararg) {
- if (j / 4 < pp->argc_stack)
- ferr(po, "esp adjust is too small: %x < %x\n",
- j, pp->argc_stack * 4);
- // modify pp to make it have varargs as normal args
- arg = pp->argc;
- pp->argc += j / 4 - pp->argc_stack;
- for (; arg < pp->argc; arg++) {
- pp->arg[arg].type.name = strdup("int");
- pp->argc_stack++;
- }
- if (pp->argc > ARRAY_SIZE(pp->arg))
- ferr(po, "too many args for '%s'\n", tmpname);
- }
- if (pp->argc_stack != j / 4)
- ferr(po, "stack tracking failed for '%s': %x %x\n",
- tmpname, pp->argc_stack * 4, j);
-
- ops[ret].flags |= OPF_RMD;
- if (ops[ret].op == OP_POP && j > 4) {
- // deal with multi-pop stack adjust
- j = pp->argc_stack;
- while (ops[ret].op == OP_POP && j > 0 && ret < opcnt) {
- ops[ret].flags |= OPF_RMD;
- j--;
- ret++;
- }
- }
- else {
- // a bit of a hack, but deals with use of
- // single adj for multiple calls
- ops[ret].operand[1].val -= j;
- }
+ while (1) {
+ if (g_labels[i] != NULL) {
+ lr = &g_label_refs[i];
+ for (; lr != NULL; lr = lr->next) {
+ check_i(&ops[i], lr->i);
+ ret |= resolve_last_ref(lr->i, opr, magic, op_i);
}
- else if (pp->is_vararg)
- ferr(po, "missing esp_adjust for vararg func '%s'\n",
- pp->name);
+ if (i > 0 && LAST_OP(i - 1))
+ return ret;
+ }
- if (!pp->is_unresolved) {
- // since we know the args, collect them
- collect_call_args(po, i, pp, ®mask, &save_arg_vars,
- i + opcnt * 2);
- }
+ i--;
+ if (i < 0)
+ return -1;
- if (strstr(pp->ret_type.name, "int64"))
- need_mul_var = 1;
- }
- }
+ if (ops[i].cc_scratch == magic)
+ return 0;
+ ops[i].cc_scratch = magic;
- // pass4:
- // - find POPs for PUSHes, rm both
- // - scan for STD/CLD, propagate DF
- // - scan for all used registers
- // - find flag set ops for their users
- // - do unreselved calls
- // - declare indirect functions
- for (i = 0; i < opcnt; i++) {
- po = &ops[i];
- if (po->flags & OPF_RMD)
+ if (!is_opr_referenced(opr, &ops[i]))
continue;
- if (po->op == OP_PUSH && (po->flags & OPF_RSAVE)) {
- reg = po->operand[0].reg;
- if (!(regmask & (1 << reg)))
- // not a reg save after all, rerun scan_for_pop
- po->flags &= ~OPF_RSAVE;
- else
- regmask_save |= 1 << reg;
- }
+ if (*op_i >= 0)
+ return -1;
- if (po->op == OP_PUSH
- && po->argnum == 0 && !(po->flags & OPF_RSAVE)
- && po->operand[0].type == OPT_REG)
- {
- reg = po->operand[0].reg;
- if (reg < 0)
- ferr(po, "reg not set for push?\n");
+ *op_i = i;
+ return 1;
+ }
+}
- depth = 0;
- ret = scan_for_pop(i + 1, opcnt,
- po->operand[0].name, i + opcnt * 3, 0, &depth, 0);
- if (ret == 1) {
- if (depth > 1)
- ferr(po, "too much depth: %d\n", depth);
+// find next instruction that reads opr
+// *op_i must be set to -1 by the caller
+// on return, *op_i is set to first referencer insn
+// returns 1 if exactly 1 referencer is found
+static int find_next_read(int i, int opcnt,
+ const struct parsed_opr *opr, int magic, int *op_i)
+{
+ struct parsed_op *po;
+ int j, ret = 0;
- po->flags |= OPF_RMD;
- scan_for_pop(i + 1, opcnt, po->operand[0].name,
- i + opcnt * 4, 0, &depth, 1);
- continue;
- }
- ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, 0);
- if (ret == 0) {
- arg = OPF_RMD;
- if (regmask & (1 << reg)) {
- if (regmask_save & (1 << reg))
- ferr(po, "%s already saved?\n", po->operand[0].name);
- arg = OPF_RSAVE;
+ for (; i < opcnt; i++)
+ {
+ if (ops[i].cc_scratch == magic)
+ return ret;
+ ops[i].cc_scratch = magic;
+
+ po = &ops[i];
+ if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
+ if (po->btj != NULL) {
+ // jumptable
+ for (j = 0; j < po->btj->count; j++) {
+ check_i(po, po->btj->d[j].bt_i);
+ ret |= find_next_read(po->btj->d[j].bt_i, opcnt, opr,
+ magic, op_i);
}
- po->flags |= arg;
- scan_for_pop_ret(i + 1, opcnt, po->operand[0].name, arg);
- continue;
+ return ret;
}
- }
- if (po->op == OP_STD) {
- po->flags |= OPF_DF | OPF_RMD;
- scan_propagate_df(i + 1, opcnt);
+ if (po->flags & OPF_RMD)
+ continue;
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP) {
+ ret |= find_next_read(po->bt_i, opcnt, opr, magic, op_i);
+ if (ret < 0)
+ return ret;
+ }
+ else
+ i = po->bt_i - 1;
+ continue;
}
- regmask_now = po->regmask_src | po->regmask_dst;
- if (regmask_now & (1 << xBP)) {
- if (g_bp_frame && !(po->flags & OPF_EBP_S)) {
- if (po->regmask_dst & (1 << xBP))
- // compiler decided to drop bp frame and use ebp as scratch
- scan_fwd_set_flags(i, opcnt, i + opcnt * 5, OPF_EBP_S);
- else
- regmask_now &= ~(1 << xBP);
+ if (!is_opr_read(opr, po)) {
+ if (is_opr_modified(opr, po)
+ && (po->op == OP_CALL
+ || ((po->flags & OPF_DATA)
+ && po->operand[0].lmod == OPLM_DWORD)))
+ {
+ // it's overwritten
+ return ret;
}
+ if (po->flags & OPF_TAIL)
+ return ret;
+ continue;
}
- regmask |= regmask_now;
+ if (*op_i >= 0)
+ return -1;
- if (po->flags & OPF_CC)
- {
- int setters[16], cnt = 0, branched = 0;
+ *op_i = i;
+ return 1;
+ }
- ret = scan_for_flag_set(i, i + opcnt * 6,
- &branched, setters, &cnt);
- if (ret < 0 || cnt <= 0)
- ferr(po, "unable to trace flag setter(s)\n");
- if (cnt > ARRAY_SIZE(setters))
- ferr(po, "too many flag setters\n");
+ return 0;
+}
- pfo = split_cond(po, po->op, &dummy);
- for (j = 0; j < cnt; j++)
- {
- tmp_op = &ops[setters[j]]; // flag setter
- pfomask = 0;
+static int try_resolve_const(int i, const struct parsed_opr *opr,
+ int magic, unsigned int *val)
+{
+ int s_i = -1;
+ int ret;
- // to get nicer code, we try to delay test and cmp;
- // if we can't because of operand modification, or if we
- // have arith op, or branch, make it calculate flags explicitly
- if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP)
- {
- if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0)
- pfomask = 1 << pfo;
- }
- else if (tmp_op->op == OP_SCAS) {
- pfomask = 1 << pfo;
- }
- else if (tmp_op->op == OP_CMPS) {
- pfomask = 1 << PFO_Z;
- }
- else {
- // see if we'll be able to handle based on op result
- if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR
- && pfo != PFO_Z && pfo != PFO_S && pfo != PFO_P)
- || branched
- || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0)
- pfomask = 1 << pfo;
- }
- if (pfomask) {
- tmp_op->pfomask |= pfomask;
- cmp_result_vars |= pfomask;
- }
- // note: may overwrite, currently not a problem
- po->datap = tmp_op;
- }
+ ret = resolve_origin(i, opr, magic, &s_i, NULL);
+ if (ret == 1) {
+ i = s_i;
+ if (ops[i].op != OP_MOV && ops[i].operand[1].type != OPT_CONST)
+ return -1;
- if (po->op == OP_ADC || po->op == OP_SBB)
- cmp_result_vars |= 1 << PFO_C;
- }
- else if (po->op == OP_CMPS || po->op == OP_SCAS) {
- cmp_result_vars |= 1 << PFO_Z;
- }
- else if (po->op == OP_MUL
- || (po->op == OP_IMUL && po->operand_cnt == 1))
- {
- need_mul_var = 1;
- }
- else if (po->op == OP_CALL) {
- pp = po->datap;
- if (pp == NULL)
- ferr(po, "NULL pp\n");
+ *val = ops[i].operand[1].val;
+ return 1;
+ }
- if (pp->is_unresolved) {
- int regmask_stack = 0;
- collect_call_args(po, i, pp, ®mask, &save_arg_vars,
- i + opcnt * 2);
+ return -1;
+}
- // this is pretty rough guess:
- // see ecx and edx were pushed (and not their saved versions)
- for (arg = 0; arg < pp->argc; arg++) {
- if (pp->arg[arg].reg != NULL)
- continue;
+static const struct parsed_proto *resolve_icall(int i, int opcnt,
+ int *pp_i, int *multi_src)
+{
+ const struct parsed_proto *pp = NULL;
+ int search_advice = 0;
+ int offset = -1;
+ char name[256];
+ char s_reg[4];
+ int reg, len;
+ int ret;
- tmp_op = pp->arg[arg].datap;
- if (tmp_op == NULL)
- ferr(po, "parsed_op missing for arg%d\n", arg);
- if (tmp_op->argnum == 0 && tmp_op->operand[0].type == OPT_REG)
- regmask_stack |= 1 << tmp_op->operand[0].reg;
- }
+ *multi_src = 0;
+ *pp_i = -1;
- if (!((regmask_stack & (1 << xCX))
- && (regmask_stack & (1 << xDX))))
+ switch (ops[i].operand[0].type) {
+ case OPT_REGMEM:
+ // try to resolve struct member calls
+ ret = sscanf(ops[i].operand[0].name, "%3s+%x%n",
+ s_reg, &offset, &len);
+ if (ret == 2 && len == strlen(ops[i].operand[0].name))
+ {
+ reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32), s_reg);
+ if (reg >= 0) {
+ struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, reg);
+ int j = -1;
+ ret = resolve_origin(i, &opr, i + opcnt * 19, &j, NULL);
+ if (ret != 1)
+ break;
+ if (ops[j].op == OP_MOV && ops[j].operand[1].type == OPT_REGMEM
+ && ops[j].operand[0].lmod == OPLM_DWORD
+ && ops[j].pp == NULL) // no hint
{
- if (pp->argc_stack != 0
- || ((regmask | regmask_arg) & ((1 << xCX)|(1 << xDX))))
- {
- pp_insert_reg_arg(pp, "ecx");
- pp->is_fastcall = 1;
- regmask_init |= 1 << xCX;
- regmask |= 1 << xCX;
- }
- if (pp->argc_stack != 0
- || ((regmask | regmask_arg) & (1 << xDX)))
- {
- pp_insert_reg_arg(pp, "edx");
- regmask_init |= 1 << xDX;
- regmask |= 1 << xDX;
- }
- }
-
- // note: __cdecl doesn't fall into is_unresolved category
- if (pp->argc_stack > 0)
- pp->is_stdcall = 1;
- }
-
- for (arg = 0; arg < pp->argc; arg++) {
- if (pp->arg[arg].reg != NULL) {
- reg = char_array_i(regs_r32,
- ARRAY_SIZE(regs_r32), pp->arg[arg].reg);
+ // allow one simple dereference (directx)
+ reg = char_array_i(regs_r32, ARRAY_SIZE(regs_r32),
+ ops[j].operand[1].name);
if (reg < 0)
- ferr(ops, "arg '%s' is not a reg?\n", pp->arg[arg].reg);
- if (!(regmask & (1 << reg))) {
- regmask_init |= 1 << reg;
- regmask |= 1 << reg;
- }
+ break;
+ struct parsed_opr opr2 = OPR_INIT(OPT_REG, OPLM_DWORD, reg);
+ int k = -1;
+ ret = resolve_origin(j, &opr2, j + opcnt * 19, &k, NULL);
+ if (ret != 1)
+ break;
+ j = k;
}
- }
-
- if (pp->is_fptr) {
- if (pp->name[0] != 0) {
- memmove(pp->name + 2, pp->name, strlen(pp->name) + 1);
- memcpy(pp->name, "i_", 2);
-
- // might be declared already
- found = 0;
- for (j = 0; j < i; j++) {
- if (ops[j].op == OP_CALL && (pp_tmp = ops[j].datap)) {
- if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) {
- found = 1;
- break;
- }
- }
- }
- if (found)
- continue;
+ if (ops[j].op != OP_MOV)
+ break;
+ if (ops[j].operand[0].lmod != OPLM_DWORD)
+ break;
+ if (ops[j].pp != NULL) {
+ // type hint in asm
+ pp = ops[j].pp;
+ }
+ else if (ops[j].operand[1].type == OPT_REGMEM) {
+ // allow 'hello[ecx]' - assume array of same type items
+ ret = sscanf(ops[j].operand[1].name, "%[^[][e%2s]",
+ name, s_reg);
+ if (ret != 2)
+ break;
+ pp = proto_parse(g_fhdr, name, g_quiet_pp);
}
+ else if (ops[j].operand[1].type == OPT_LABEL)
+ pp = proto_parse(g_fhdr, ops[j].operand[1].name, g_quiet_pp);
else
- snprintf(pp->name, sizeof(pp->name), "icall%d", i);
-
- fprintf(fout, " %s (", pp->ret_type.name);
- output_pp_attrs(fout, pp, 0);
- fprintf(fout, "*%s)(", pp->name);
- for (j = 0; j < pp->argc; j++) {
- if (j > 0)
- fprintf(fout, ", ");
- fprintf(fout, "%s a%d", pp->arg[j].type.name, j + 1);
+ break;
+ if (pp == NULL)
+ break;
+ if (pp->is_func || pp->is_fptr || !pp->type.is_struct) {
+ pp = NULL;
+ break;
}
- fprintf(fout, ");\n");
+ pp = proto_lookup_struct(g_fhdr, pp->type.name, offset);
}
+ break;
}
- else if (po->op == OP_RET && !IS(g_func_pp->ret_type.name, "void"))
- regmask |= 1 << xAX;
+ // fallthrough
+ case OPT_LABEL:
+ case OPT_OFFSET:
+ pp = try_recover_pp(&ops[i], &ops[i].operand[0], &search_advice);
+ if (!search_advice)
+ break;
+ // fallthrough
+ default:
+ scan_for_call_type(i, &ops[i].operand[0], i + opcnt * 9, &pp,
+ pp_i, multi_src);
+ break;
}
- // pass4:
- // - confirm regmask_save, it might have been reduced
- if (regmask_save != 0)
- {
- regmask_save = 0;
- for (i = 0; i < opcnt; i++) {
- po = &ops[i];
- if (po->flags & OPF_RMD)
- continue;
+ return pp;
+}
+
+static struct parsed_proto *process_call_early(int i, int opcnt,
+ int *adj_i)
+{
+ struct parsed_op *po = &ops[i];
+ struct parsed_proto *pp;
+ int multipath = 0;
+ int adj = 0;
+ int j, ret;
+
+ pp = po->pp;
+ if (pp == NULL || pp->is_vararg || pp->argc_reg != 0)
+ // leave for later
+ return NULL;
- if (po->op == OP_PUSH && (po->flags & OPF_RSAVE))
- regmask_save |= 1 << po->operand[0].reg;
+ // look for and make use of esp adjust
+ *adj_i = ret = -1;
+ if (!pp->is_stdcall && pp->argc_stack > 0)
+ ret = scan_for_esp_adjust(i + 1, opcnt,
+ pp->argc_stack * 4, &adj, &multipath, 0);
+ if (ret >= 0) {
+ if (pp->argc_stack > adj / 4)
+ return NULL;
+ if (multipath)
+ return NULL;
+ if (ops[ret].op == OP_POP) {
+ for (j = 1; j < adj / 4; j++) {
+ if (ops[ret + j].op != OP_POP
+ || ops[ret + j].operand[0].reg != xCX)
+ {
+ return NULL;
+ }
+ }
}
}
+ *adj_i = ret;
+ return pp;
+}
- // output LUTs/jumptables
- for (i = 0; i < g_func_pd_cnt; i++) {
- pd = &g_func_pd[i];
- fprintf(fout, " static const ");
- if (pd->type == OPT_OFFSET) {
- fprintf(fout, "void *jt_%s[] =\n { ", pd->label);
+static struct parsed_proto *process_call(int i, int opcnt)
+{
+ struct parsed_op *po = &ops[i];
+ const struct parsed_proto *pp_c;
+ struct parsed_proto *pp;
+ const char *tmpname;
+ int call_i = -1, ref_i = -1;
+ int adj = 0, multipath = 0;
+ int ret, arg;
- for (j = 0; j < pd->count; j++) {
- if (j > 0)
- fprintf(fout, ", ");
- fprintf(fout, "&&%s", pd->d[j].u.label);
+ tmpname = opr_name(po, 0);
+ pp = po->pp;
+ if (pp == NULL)
+ {
+ // indirect call
+ pp_c = resolve_icall(i, opcnt, &call_i, &multipath);
+ if (pp_c != NULL) {
+ if (!pp_c->is_func && !pp_c->is_fptr)
+ ferr(po, "call to non-func: %s\n", pp_c->name);
+ pp = proto_clone(pp_c);
+ my_assert_not(pp, NULL);
+ if (multipath)
+ // not resolved just to single func
+ pp->is_fptr = 1;
+
+ switch (po->operand[0].type) {
+ case OPT_REG:
+ // we resolved this call and no longer need the register
+ po->regmask_src &= ~(1 << po->operand[0].reg);
+
+ if (!multipath && i != call_i && ops[call_i].op == OP_MOV
+ && ops[call_i].operand[1].type == OPT_LABEL)
+ {
+ // no other source users?
+ ret = resolve_last_ref(i, &po->operand[0], i + opcnt * 10,
+ &ref_i);
+ if (ret == 1 && call_i == ref_i) {
+ // and nothing uses it after us?
+ ref_i = -1;
+ find_next_read(i + 1, opcnt, &po->operand[0],
+ i + opcnt * 11, &ref_i);
+ if (ref_i == -1)
+ // then also don't need the source mov
+ ops[call_i].flags |= OPF_RMD | OPF_NOREGS;
+ }
+ }
+ break;
+ case OPT_REGMEM:
+ pp->is_fptr = 1;
+ break;
+ default:
+ break;
}
}
- else {
- fprintf(fout, "%s %s[] =\n { ",
- lmod_type_u(ops, pd->lmod), pd->label);
+ if (pp == NULL) {
+ pp = calloc(1, sizeof(*pp));
+ my_assert_not(pp, NULL);
+
+ pp->is_fptr = 1;
+ ret = scan_for_esp_adjust(i + 1, opcnt,
+ -1, &adj, &multipath, 0);
+ if (ret < 0 || adj < 0) {
+ if (!g_allow_regfunc)
+ ferr(po, "non-__cdecl indirect call unhandled yet\n");
+ pp->is_unresolved = 1;
+ adj = 0;
+ }
+ adj /= 4;
+ if (adj > ARRAY_SIZE(pp->arg))
+ ferr(po, "esp adjust too large: %d\n", adj);
+ pp->ret_type.name = strdup("int");
+ pp->argc = pp->argc_stack = adj;
+ for (arg = 0; arg < pp->argc; arg++)
+ pp->arg[arg].type.name = strdup("int");
+ }
+ po->pp = pp;
+ }
- for (j = 0; j < pd->count; j++) {
- if (j > 0)
- fprintf(fout, ", ");
- fprintf(fout, "%u", pd->d[j].u.val);
+ // look for and make use of esp adjust
+ multipath = 0;
+ ret = -1;
+ if (!pp->is_stdcall && pp->argc_stack > 0) {
+ int adj_expect = pp->is_vararg ? -1 : pp->argc_stack * 4;
+ ret = scan_for_esp_adjust(i + 1, opcnt,
+ adj_expect, &adj, &multipath, 0);
+ }
+ if (ret >= 0) {
+ if (pp->is_vararg) {
+ if (adj / 4 < pp->argc_stack) {
+ fnote(po, "(this call)\n");
+ ferr(&ops[ret], "esp adjust is too small: %x < %x\n",
+ adj, pp->argc_stack * 4);
+ }
+ // modify pp to make it have varargs as normal args
+ arg = pp->argc;
+ pp->argc += adj / 4 - pp->argc_stack;
+ for (; arg < pp->argc; arg++) {
+ pp->arg[arg].type.name = strdup("int");
+ pp->argc_stack++;
}
+ if (pp->argc > ARRAY_SIZE(pp->arg))
+ ferr(po, "too many args for '%s'\n", tmpname);
}
- fprintf(fout, " };\n");
+ if (pp->argc_stack > adj / 4) {
+ fnote(po, "(this call)\n");
+ ferr(&ops[ret], "stack tracking failed for '%s': %x %x\n",
+ tmpname, pp->argc_stack * 4, adj);
+ }
+
+ scan_for_esp_adjust(i + 1, opcnt,
+ pp->argc_stack * 4, &adj, &multipath, 1);
}
+ else if (pp->is_vararg)
+ ferr(po, "missing esp_adjust for vararg func '%s'\n",
+ pp->name);
- // declare stack frame, va_arg
- if (g_stack_fsz)
- fprintf(fout, " union { u32 d[%d]; u16 w[%d]; u8 b[%d]; } sf;\n",
- (g_stack_fsz + 3) / 4, (g_stack_fsz + 1) / 2, g_stack_fsz);
+ return pp;
+}
- if (g_func_pp->is_vararg)
- fprintf(fout, " va_list ap;\n");
+static int collect_call_args_early(struct parsed_op *po, int i,
+ struct parsed_proto *pp, int *regmask)
+{
+ int arg, ret;
+ int j;
- // declare arg-registers
- for (i = 0; i < g_func_pp->argc; i++) {
- if (g_func_pp->arg[i].reg != NULL) {
- reg = char_array_i(regs_r32,
- ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg);
- if (regmask & (1 << reg)) {
- fprintf(fout, " u32 %s = (u32)a%d;\n",
- g_func_pp->arg[i].reg, i + 1);
- }
- else
- fprintf(fout, " // %s = a%d; // unused\n",
- g_func_pp->arg[i].reg, i + 1);
- had_decl = 1;
- }
- }
+ for (arg = 0; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
- regmask_now = regmask & ~regmask_arg;
- regmask_now &= ~(1 << xSP);
- if (regmask_now) {
- for (reg = 0; reg < 8; reg++) {
- if (regmask_now & (1 << reg)) {
- fprintf(fout, " u32 %s", regs_r32[reg]);
- if (regmask_init & (1 << reg))
- fprintf(fout, " = 0");
- fprintf(fout, ";\n");
- had_decl = 1;
- }
- }
- }
+ // first see if it can be easily done
+ for (j = i; j > 0 && arg < pp->argc; )
+ {
+ if (g_labels[j] != NULL)
+ return -1;
+ j--;
- if (regmask_save) {
- for (reg = 0; reg < 8; reg++) {
- if (regmask_save & (1 << reg)) {
- fprintf(fout, " u32 s_%s;\n", regs_r32[reg]);
- had_decl = 1;
- }
- }
- }
+ if (ops[j].op == OP_CALL)
+ return -1;
+ else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP)
+ return -1;
+ else if (ops[j].op == OP_POP)
+ return -1;
+ else if (ops[j].flags & OPF_CJMP)
+ return -1;
+ else if (ops[j].op == OP_PUSH) {
+ if (ops[j].flags & (OPF_FARG|OPF_FARGNR))
+ return -1;
+ ret = scan_for_mod(&ops[j], j + 1, i, 1);
+ if (ret >= 0)
+ return -1;
- if (save_arg_vars) {
- for (reg = 0; reg < 32; reg++) {
- if (save_arg_vars & (1 << reg)) {
- fprintf(fout, " u32 s_a%d;\n", reg + 1);
- had_decl = 1;
- }
- }
- }
+ if (pp->arg[arg].type.is_va_list)
+ return -1;
- if (cmp_result_vars) {
- for (i = 0; i < 8; i++) {
- if (cmp_result_vars & (1 << i)) {
- fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]);
- had_decl = 1;
- }
+ // next arg
+ for (arg++; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
}
}
- if (need_mul_var) {
- fprintf(fout, " u64 mul_tmp;\n");
- had_decl = 1;
- }
-
- if (had_decl)
- fprintf(fout, "\n");
+ if (arg < pp->argc)
+ return -1;
- if (g_func_pp->is_vararg) {
- if (g_func_pp->argc_stack == 0)
- ferr(ops, "vararg func without stack args?\n");
- fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc);
- }
+ // now do it
+ for (arg = 0; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
- // output ops
- for (i = 0; i < opcnt; i++)
+ for (j = i; j > 0 && arg < pp->argc; )
{
- if (g_labels[i][0] != 0) {
- fprintf(fout, "\n%s:\n", g_labels[i]);
- label_pending = 1;
+ j--;
- delayed_flag_op = NULL;
- last_arith_dst = NULL;
- }
+ if (ops[j].op == OP_PUSH)
+ {
+ ops[j].p_argnext = -1;
+ ferr_assert(&ops[j], pp->arg[arg].datap == NULL);
+ pp->arg[arg].datap = &ops[j];
- po = &ops[i];
- if (po->flags & OPF_RMD)
- continue;
+ if (ops[j].operand[0].type == OPT_REG)
+ *regmask |= 1 << ops[j].operand[0].reg;
- no_output = 0;
+ ops[j].flags |= OPF_RMD | OPF_DONE | OPF_FARGNR | OPF_FARG;
+ ops[j].flags &= ~OPF_RSAVE;
- #define assert_operand_cnt(n_) \
- if (po->operand_cnt != n_) \
- ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_)
+ // next arg
+ for (arg++; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
+ }
+ }
- // conditional/flag using op?
- if (po->flags & OPF_CC)
- {
- int is_delayed = 0;
- int is_inv = 0;
+ return 0;
+}
- pfo = split_cond(po, po->op, &is_inv);
- tmp_op = po->datap;
+static int collect_call_args_r(struct parsed_op *po, int i,
+ struct parsed_proto *pp, int *regmask, int *save_arg_vars,
+ int *arg_grp, int arg, int magic, int need_op_saving, int may_reuse)
+{
+ struct parsed_proto *pp_tmp;
+ struct parsed_op *po_tmp;
+ struct label_ref *lr;
+ int need_to_save_current;
+ int arg_grp_current = 0;
+ int save_args_seen = 0;
+ int save_args;
+ int ret = 0;
+ int reg;
+ char buf[32];
+ int j, k;
- // we go through all this trouble to avoid using parsed_flag_op,
- // which makes generated code much nicer
- if (delayed_flag_op != NULL)
- {
- out_cmp_test(buf1, sizeof(buf1), delayed_flag_op, pfo, is_inv);
- is_delayed = 1;
- }
- else if (last_arith_dst != NULL
- && (pfo == PFO_Z || pfo == PFO_S || pfo == PFO_P
- || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR))
- ))
- {
- out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst);
- out_test_for_cc(buf1, sizeof(buf1), po, pfo, is_inv,
- last_arith_dst->lmod, buf3);
- is_delayed = 1;
- }
- else if (tmp_op != NULL) {
- // use preprocessed flag calc results
- if (!(tmp_op->pfomask & (1 << pfo)))
- ferr(po, "not prepared for pfo %d\n", pfo);
+ if (i < 0) {
+ ferr(po, "dead label encountered\n");
+ return -1;
+ }
- // note: is_inv was not yet applied
- snprintf(buf1, sizeof(buf1), "(%scond_%s)",
- is_inv ? "!" : "", parsed_flag_op_names[pfo]);
- }
- else {
- ferr(po, "all methods of finding comparison failed\n");
- }
-
- if (po->flags & OPF_JMP) {
- fprintf(fout, " if %s\n", buf1);
- }
- else if (po->op == OP_ADC || po->op == OP_SBB) {
- if (is_delayed)
- fprintf(fout, " cond_%s = %s;\n",
- parsed_flag_op_names[pfo], buf1);
+ for (; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
+ magic = (magic & 0xffffff) | (arg << 24);
+
+ for (j = i; j >= 0 && (arg < pp->argc || pp->is_unresolved); )
+ {
+ if (((ops[j].cc_scratch ^ magic) & 0xffffff) == 0) {
+ if (ops[j].cc_scratch != magic) {
+ ferr(&ops[j], "arg collect hit same path with diff args for %s\n",
+ pp->name);
+ return -1;
}
- else if (po->flags & OPF_DATA) { // SETcc
- out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]);
- fprintf(fout, " %s = %s;", buf2, buf1);
+ // ok: have already been here
+ return 0;
+ }
+ ops[j].cc_scratch = magic;
+
+ if (g_labels[j] != NULL && g_label_refs[j].i != -1) {
+ lr = &g_label_refs[j];
+ if (lr->next != NULL)
+ need_op_saving = 1;
+ for (; lr->next; lr = lr->next) {
+ check_i(&ops[j], lr->i);
+ if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP)
+ may_reuse = 1;
+ ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
+ arg_grp, arg, magic, need_op_saving, may_reuse);
+ if (ret < 0)
+ return ret;
}
- else {
- ferr(po, "unhandled conditional op\n");
+
+ check_i(&ops[j], lr->i);
+ if ((ops[lr->i].flags & (OPF_JMP|OPF_CJMP)) != OPF_JMP)
+ may_reuse = 1;
+ if (j > 0 && LAST_OP(j - 1)) {
+ // follow last branch in reverse
+ j = lr->i;
+ continue;
}
+ need_op_saving = 1;
+ ret = collect_call_args_r(po, lr->i, pp, regmask, save_arg_vars,
+ arg_grp, arg, magic, need_op_saving, may_reuse);
+ if (ret < 0)
+ return ret;
}
+ j--;
- pfomask = po->pfomask;
-
- switch (po->op)
+ if (ops[j].op == OP_CALL)
{
- case OP_MOV:
- assert_operand_cnt(2);
- propagate_lmod(po, &po->operand[0], &po->operand[1]);
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- fprintf(fout, " %s = %s;", buf1,
- out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
- po->operand[0].is_ptr ? "(void *)" : "", 0));
+ if (pp->is_unresolved)
break;
- case OP_LEA:
- assert_operand_cnt(2);
- po->operand[1].lmod = OPLM_DWORD; // always
- fprintf(fout, " %s = %s;",
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
- out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
- NULL, 1));
+ pp_tmp = ops[j].pp;
+ if (pp_tmp == NULL)
+ ferr(po, "arg collect hit unparsed call '%s'\n",
+ ops[j].operand[0].name);
+ if (may_reuse && pp_tmp->argc_stack > 0)
+ ferr(po, "arg collect %d/%d hit '%s' with %d stack args\n",
+ arg, pp->argc, opr_name(&ops[j], 0), pp_tmp->argc_stack);
+ }
+ // esp adjust of 0 means we collected it before
+ else if (ops[j].op == OP_ADD && ops[j].operand[0].reg == xSP
+ && (ops[j].operand[1].type != OPT_CONST
+ || ops[j].operand[1].val != 0))
+ {
+ if (pp->is_unresolved)
break;
- case OP_MOVZX:
- assert_operand_cnt(2);
- fprintf(fout, " %s = %s;",
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ fnote(po, "(this call)\n");
+ ferr(&ops[j], "arg collect %d/%d hit esp adjust of %d\n",
+ arg, pp->argc, ops[j].operand[1].val);
+ }
+ else if (ops[j].op == OP_POP && !(ops[j].flags & OPF_DONE))
+ {
+ if (pp->is_unresolved)
break;
- case OP_MOVSX:
- assert_operand_cnt(2);
- switch (po->operand[1].lmod) {
- case OPLM_BYTE:
- strcpy(buf3, "(s8)");
- break;
- case OPLM_WORD:
- strcpy(buf3, "(s16)");
- break;
- default:
- ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod);
- }
- fprintf(fout, " %s = %s;",
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
- out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
- buf3, 0));
+ fnote(po, "(this call)\n");
+ ferr(&ops[j], "arg collect %d/%d hit pop\n", arg, pp->argc);
+ }
+ else if (ops[j].flags & OPF_CJMP)
+ {
+ if (pp->is_unresolved)
break;
- case OP_NOT:
- assert_operand_cnt(1);
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- fprintf(fout, " %s = ~%s;", buf1, buf1);
+ may_reuse = 1;
+ }
+ else if (ops[j].op == OP_PUSH
+ && !(ops[j].flags & (OPF_FARGNR|OPF_DONE)))
+ {
+ if (pp->is_unresolved && (ops[j].flags & OPF_RMD))
break;
- case OP_CDQ:
- assert_operand_cnt(2);
- fprintf(fout, " %s = (s32)%s >> 31;",
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
- strcpy(g_comment, "cdq");
- break;
+ ops[j].p_argnext = -1;
+ po_tmp = pp->arg[arg].datap;
+ if (po_tmp != NULL)
+ ops[j].p_argnext = po_tmp - ops;
+ pp->arg[arg].datap = &ops[j];
- case OP_STOS:
- assert_operand_cnt(3);
- if (po->flags & OPF_REP) {
- fprintf(fout, " for (; ecx != 0; ecx--, edi %c= %d)\n",
- (po->flags & OPF_DF) ? '-' : '+',
- lmod_bytes(po, po->operand[0].lmod));
- fprintf(fout, " %sedi = eax;",
- lmod_cast_u_ptr(po, po->operand[0].lmod));
- strcpy(g_comment, "rep stos");
- }
- else {
- fprintf(fout, " %sedi = eax; edi %c= %d;",
- lmod_cast_u_ptr(po, po->operand[0].lmod),
- (po->flags & OPF_DF) ? '-' : '+',
- lmod_bytes(po, po->operand[0].lmod));
- strcpy(g_comment, "stos");
- }
- break;
+ need_to_save_current = 0;
+ save_args = 0;
+ reg = -1;
+ if (ops[j].operand[0].type == OPT_REG)
+ reg = ops[j].operand[0].reg;
- case OP_MOVS:
- assert_operand_cnt(3);
- j = lmod_bytes(po, po->operand[0].lmod);
- strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
- l = (po->flags & OPF_DF) ? '-' : '+';
- if (po->flags & OPF_REP) {
- fprintf(fout,
- " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n",
- l, j, l, j);
- fprintf(fout,
- " %sedi = %sesi;", buf1, buf1);
- strcpy(g_comment, "rep movs");
+ if (!need_op_saving) {
+ ret = scan_for_mod(&ops[j], j + 1, i, 1);
+ need_to_save_current = (ret >= 0);
+ }
+ if (need_op_saving || need_to_save_current) {
+ // mark this push as one that needs operand saving
+ ops[j].flags &= ~OPF_RMD;
+ if (ops[j].p_argnum == 0) {
+ ops[j].p_argnum = arg + 1;
+ save_args |= 1 << arg;
}
- else {
- fprintf(fout, " %sedi = %sesi; edi %c= %d; esi %c= %d;",
- buf1, buf1, l, j, l, j);
- strcpy(g_comment, "movs");
+ else if (ops[j].p_argnum < arg + 1) {
+ // XXX: might kill valid var..
+ //*save_arg_vars &= ~(1 << (ops[j].p_argnum - 1));
+ ops[j].p_argnum = arg + 1;
+ save_args |= 1 << arg;
}
- break;
- case OP_CMPS:
- // repe ~ repeat while ZF=1
- assert_operand_cnt(3);
- j = lmod_bytes(po, po->operand[0].lmod);
- strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
- l = (po->flags & OPF_DF) ? '-' : '+';
- if (po->flags & OPF_REP) {
- fprintf(fout,
- " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n",
- l, j, l, j);
- fprintf(fout,
- " if ((cond_z = (%sedi == %sesi)) %s 0)\n",
- buf1, buf1, (po->flags & OPF_REPZ) ? "==" : "!=");
- fprintf(fout,
- " break;");
- snprintf(g_comment, sizeof(g_comment), "rep%s cmps",
- (po->flags & OPF_REPZ) ? "e" : "ne");
- }
- else {
- fprintf(fout,
- " cond_z = (%sedi = %sesi); edi %c= %d; esi %c= %d;",
- buf1, buf1, l, j, l, j);
- strcpy(g_comment, "cmps");
+ if (save_args_seen & (1 << (ops[j].p_argnum - 1))) {
+ save_args_seen = 0;
+ arg_grp_current++;
+ if (arg_grp_current >= MAX_ARG_GRP)
+ ferr(&ops[j], "out of arg groups (arg%d), f %s\n",
+ ops[j].p_argnum, pp->name);
}
- pfomask &= ~(1 << PFO_Z);
- last_arith_dst = NULL;
- delayed_flag_op = NULL;
- break;
+ }
+ else if (ops[j].p_argnum == 0)
+ ops[j].flags |= OPF_RMD;
- case OP_SCAS:
- // only does ZF (for now)
- // repe ~ repeat while ZF=1
- assert_operand_cnt(3);
- j = lmod_bytes(po, po->operand[0].lmod);
- l = (po->flags & OPF_DF) ? '-' : '+';
- if (po->flags & OPF_REP) {
- fprintf(fout,
- " for (; ecx != 0; ecx--, edi %c= %d)\n", l, j);
- fprintf(fout,
- " if ((cond_z = (%seax == %sedi)) %s 0)\n",
- lmod_cast_u(po, po->operand[0].lmod),
- lmod_cast_u_ptr(po, po->operand[0].lmod),
- (po->flags & OPF_REPZ) ? "==" : "!=");
- fprintf(fout,
- " break;");
- snprintf(g_comment, sizeof(g_comment), "rep%s scas",
- (po->flags & OPF_REPZ) ? "e" : "ne");
- }
- else {
- fprintf(fout, " cond_z = (%seax = %sedi); edi %c= %d;",
- lmod_cast_u(po, po->operand[0].lmod),
- lmod_cast_u_ptr(po, po->operand[0].lmod), l, j);
- strcpy(g_comment, "scas");
- }
- pfomask &= ~(1 << PFO_Z);
- last_arith_dst = NULL;
- delayed_flag_op = NULL;
- break;
+ // some PUSHes are reused by different calls on other branches,
+ // but that can't happen if we didn't branch, so they
+ // can be removed from future searches (handles nested calls)
+ if (!may_reuse)
+ ops[j].flags |= OPF_FARGNR;
- // arithmetic w/flags
- case OP_ADD:
- case OP_SUB:
- case OP_AND:
- case OP_OR:
- propagate_lmod(po, &po->operand[0], &po->operand[1]);
- // fallthrough
- dualop_arith:
- assert_operand_cnt(2);
- fprintf(fout, " %s %s= %s;",
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
- op_to_c(po),
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
- output_std_flags(fout, po, &pfomask, buf1);
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- break;
+ ops[j].flags |= OPF_FARG;
+ ops[j].flags &= ~OPF_RSAVE;
- case OP_SHL:
- case OP_SHR:
- assert_operand_cnt(2);
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- if (pfomask & (1 << PFO_C)) {
- if (po->operand[1].type == OPT_CONST) {
- l = lmod_bytes(po, po->operand[0].lmod) * 8;
- j = po->operand[1].val;
- j %= l;
- if (j != 0) {
- if (po->op == OP_SHL)
- j = l - j;
- else
- j -= 1;
- fprintf(fout, " cond_c = (%s & 0x%02x) ? 1 : 0;\n",
- buf1, 1 << j);
+ // check for __VALIST
+ if (!pp->is_unresolved && g_func_pp != NULL
+ && pp->arg[arg].type.is_va_list)
+ {
+ k = -1;
+ ret = resolve_origin(j, &ops[j].operand[0],
+ magic + 1, &k, NULL);
+ if (ret == 1 && k >= 0)
+ {
+ if (ops[k].op == OP_LEA) {
+ if (!g_func_pp->is_vararg)
+ ferr(&ops[k], "lea <arg> used, but %s is not vararg?\n",
+ g_func_pp->name);
+
+ snprintf(buf, sizeof(buf), "arg_%X",
+ g_func_pp->argc_stack * 4);
+ if (strstr(ops[k].operand[1].name, buf)
+ || strstr(ops[k].operand[1].name, "arglist"))
+ {
+ ops[k].flags |= OPF_RMD | OPF_NOREGS | OPF_DONE;
+ ops[j].flags |= OPF_RMD | OPF_NOREGS | OPF_VAPUSH;
+ save_args &= ~(1 << arg);
+ reg = -1;
}
else
- ferr(po, "zero shift?\n");
+ ferr(&ops[k], "va_list arg detection failed\n");
+ }
+ // check for va_list from g_func_pp arg too
+ else if (ops[k].op == OP_MOV
+ && is_stack_access(&ops[k], &ops[k].operand[1]))
+ {
+ ret = stack_frame_access(&ops[k], &ops[k].operand[1],
+ buf, sizeof(buf), ops[k].operand[1].name, "", 1, 0);
+ if (ret >= 0) {
+ ops[k].flags |= OPF_RMD | OPF_DONE;
+ ops[j].flags |= OPF_RMD;
+ ops[j].p_argpass = ret + 1;
+ save_args &= ~(1 << arg);
+ reg = -1;
+ }
}
- else
- ferr(po, "TODO\n");
- pfomask &= ~(1 << PFO_C);
}
- fprintf(fout, " %s %s= %s;", buf1, op_to_c(po),
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
- output_std_flags(fout, po, &pfomask, buf1);
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- break;
+ }
- case OP_SAR:
- assert_operand_cnt(2);
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- fprintf(fout, " %s = %s%s >> %s;", buf1,
- lmod_cast_s(po, po->operand[0].lmod), buf1,
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
- output_std_flags(fout, po, &pfomask, buf1);
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- break;
+ *save_arg_vars |= save_args;
- case OP_ROL:
- case OP_ROR:
- assert_operand_cnt(2);
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- if (po->operand[1].type == OPT_CONST) {
- j = po->operand[1].val;
- j %= lmod_bytes(po, po->operand[0].lmod) * 8;
- fprintf(fout, po->op == OP_ROL ?
- " %s = (%s << %d) | (%s >> %d);" :
- " %s = (%s >> %d) | (%s << %d);",
- buf1, buf1, j, buf1,
- lmod_bytes(po, po->operand[0].lmod) * 8 - j);
- }
- else
- ferr(po, "TODO\n");
- output_std_flags(fout, po, &pfomask, buf1);
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- break;
+ // tracking reg usage
+ if (reg >= 0)
+ *regmask |= 1 << reg;
- case OP_XOR:
- assert_operand_cnt(2);
- propagate_lmod(po, &po->operand[0], &po->operand[1]);
- if (IS(opr_name(po, 0), opr_name(po, 1))) {
- // special case for XOR
- fprintf(fout, " %s = 0;",
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]));
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- break;
- }
- goto dualop_arith;
+ arg++;
+ if (!pp->is_unresolved) {
+ // next arg
+ for (; arg < pp->argc; arg++)
+ if (pp->arg[arg].reg == NULL)
+ break;
+ }
+ magic = (magic & 0xffffff) | (arg << 24);
+ }
- case OP_ADC:
- case OP_SBB:
- assert_operand_cnt(2);
- propagate_lmod(po, &po->operand[0], &po->operand[1]);
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- if (po->op == OP_SBB
- && IS(po->operand[0].name, po->operand[1].name))
- {
- // avoid use of unitialized var
- fprintf(fout, " %s = -cond_c;", buf1);
- // carry remains what it was
- pfomask &= ~(1 << PFO_C);
- }
- else {
- fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po),
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
- }
- output_std_flags(fout, po, &pfomask, buf1);
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- break;
+ if (ops[j].p_arggrp > arg_grp_current) {
+ save_args_seen = 0;
+ arg_grp_current = ops[j].p_arggrp;
+ }
+ if (ops[j].p_argnum > 0)
+ save_args_seen |= 1 << (ops[j].p_argnum - 1);
+ }
- case OP_INC:
- case OP_DEC:
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- if (po->operand[0].type == OPT_REG) {
- strcpy(buf2, po->op == OP_INC ? "++" : "--");
- fprintf(fout, " %s%s;", buf1, buf2);
- }
- else {
- strcpy(buf2, po->op == OP_INC ? "+" : "-");
- fprintf(fout, " %s %s= 1;", buf1, buf2);
- }
- output_std_flags(fout, po, &pfomask, buf1);
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- break;
+ if (arg < pp->argc) {
+ ferr(po, "arg collect failed for '%s': %d/%d\n",
+ pp->name, arg, pp->argc);
+ return -1;
+ }
- case OP_NEG:
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]);
- fprintf(fout, " %s = -%s%s;", buf1,
- lmod_cast_s(po, po->operand[0].lmod), buf2);
- last_arith_dst = &po->operand[0];
- delayed_flag_op = NULL;
- if (pfomask & (1 << PFO_C)) {
- fprintf(fout, "\n cond_c = (%s != 0);", buf1);
- pfomask &= ~(1 << PFO_C);
- }
- break;
+ if (arg_grp_current > *arg_grp)
+ *arg_grp = arg_grp_current;
- case OP_IMUL:
- if (po->operand_cnt == 2) {
- propagate_lmod(po, &po->operand[0], &po->operand[1]);
- goto dualop_arith;
- }
- if (po->operand_cnt == 3)
- ferr(po, "TODO imul3\n");
- // fallthrough
- case OP_MUL:
- assert_operand_cnt(1);
- strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)");
- fprintf(fout, " mul_tmp = %seax * %s%s;\n", buf1, buf1,
- out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]));
- fprintf(fout, " edx = mul_tmp >> 32;\n");
- fprintf(fout, " eax = mul_tmp;");
- last_arith_dst = NULL;
- delayed_flag_op = NULL;
- break;
+ return arg;
+}
- case OP_DIV:
- case OP_IDIV:
- assert_operand_cnt(1);
- if (po->operand[0].lmod != OPLM_DWORD)
- ferr(po, "unhandled lmod %d\n", po->operand[0].lmod);
+static int collect_call_args(struct parsed_op *po, int i,
+ struct parsed_proto *pp, int *regmask, int *save_arg_vars,
+ int magic)
+{
+ // arg group is for cases when pushes for
+ // multiple funcs are going on
+ struct parsed_op *po_tmp;
+ int save_arg_vars_current = 0;
+ int arg_grp = 0;
+ int ret;
+ int a;
- // 32bit division is common, look for it
- if (po->op == OP_DIV)
+ ret = collect_call_args_r(po, i, pp, regmask,
+ &save_arg_vars_current, &arg_grp, 0, magic, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ if (arg_grp != 0) {
+ // propagate arg_grp
+ for (a = 0; a < pp->argc; a++) {
+ if (pp->arg[a].reg != NULL)
+ continue;
+
+ po_tmp = pp->arg[a].datap;
+ while (po_tmp != NULL) {
+ po_tmp->p_arggrp = arg_grp;
+ if (po_tmp->p_argnext > 0)
+ po_tmp = &ops[po_tmp->p_argnext];
+ else
+ po_tmp = NULL;
+ }
+ }
+ }
+ save_arg_vars[arg_grp] |= save_arg_vars_current;
+
+ if (pp->is_unresolved) {
+ pp->argc += ret;
+ pp->argc_stack += ret;
+ for (a = 0; a < pp->argc; a++)
+ if (pp->arg[a].type.name == NULL)
+ pp->arg[a].type.name = strdup("int");
+ }
+
+ return ret;
+}
+
+static void reg_use_pass(int i, int opcnt, unsigned char *cbits,
+ int regmask_now, int *regmask,
+ int regmask_save_now, int *regmask_save,
+ int *regmask_init, int regmask_arg)
+{
+ struct parsed_op *po;
+ unsigned int mask;
+ int already_saved;
+ int regmask_new;
+ int regmask_op;
+ int flags_set;
+ int ret, reg;
+ int j;
+
+ for (; i < opcnt; i++)
+ {
+ po = &ops[i];
+ if (cbits[i >> 3] & (1 << (i & 7)))
+ return;
+ cbits[i >> 3] |= (1 << (i & 7));
+
+ if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ continue;
+ if (po->btj != NULL) {
+ for (j = 0; j < po->btj->count; j++) {
+ check_i(po, po->btj->d[j].bt_i);
+ reg_use_pass(po->btj->d[j].bt_i, opcnt, cbits,
+ regmask_now, regmask, regmask_save_now, regmask_save,
+ regmask_init, regmask_arg);
+ }
+ return;
+ }
+
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP)
+ reg_use_pass(po->bt_i, opcnt, cbits,
+ regmask_now, regmask, regmask_save_now, regmask_save,
+ regmask_init, regmask_arg);
+ else
+ i = po->bt_i - 1;
+ continue;
+ }
+
+ if (po->op == OP_PUSH && !(po->flags & (OPF_FARG|OPF_DONE))
+ && !g_func_pp->is_userstack
+ && po->operand[0].type == OPT_REG)
+ {
+ reg = po->operand[0].reg;
+ ferr_assert(po, reg >= 0);
+
+ already_saved = 0;
+ flags_set = OPF_RSAVE | OPF_RMD | OPF_DONE;
+ if (regmask_now & (1 << reg)) {
+ already_saved = regmask_save_now & (1 << reg);
+ flags_set = OPF_RSAVE | OPF_DONE;
+ }
+
+ ret = scan_for_pop(i + 1, opcnt, i + opcnt * 3, reg, 0, 0);
+ if (ret == 1) {
+ scan_for_pop(i + 1, opcnt, i + opcnt * 4, reg, 0, flags_set);
+ }
+ else {
+ ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0);
+ if (ret == 1) {
+ scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg,
+ flags_set);
+ }
+ }
+ if (ret == 1) {
+ ferr_assert(po, !already_saved);
+ po->flags |= flags_set;
+
+ if (regmask_now & (1 << reg)) {
+ regmask_save_now |= (1 << reg);
+ *regmask_save |= regmask_save_now;
+ }
+ continue;
+ }
+ }
+ else if (po->op == OP_POP && (po->flags & OPF_RSAVE)) {
+ reg = po->operand[0].reg;
+ ferr_assert(po, reg >= 0);
+
+ if (regmask_save_now & (1 << reg))
+ regmask_save_now &= ~(1 << reg);
+ else
+ regmask_now &= ~(1 << reg);
+ continue;
+ }
+ else if (po->op == OP_CALL) {
+ if ((po->regmask_dst & (1 << xAX))
+ && !(po->regmask_dst & (1 << xDX)))
+ {
+ if (po->flags & OPF_TAIL)
+ // don't need eax, will do "return f();" or "f(); return;"
+ po->regmask_dst &= ~(1 << xAX);
+ else {
+ struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xAX);
+ j = -1;
+ find_next_read(i + 1, opcnt, &opr, i + opcnt * 17, &j);
+ if (j == -1)
+ // not used
+ po->regmask_dst &= ~(1 << xAX);
+ }
+ }
+ }
+
+ if (po->flags & OPF_NOREGS)
+ continue;
+
+ if (po->flags & OPF_FPUSH) {
+ if (regmask_now & mxST1)
+ ferr(po, "TODO: FPUSH on active ST1\n");
+ if (regmask_now & mxST0)
+ po->flags |= OPF_FSHIFT;
+ mask = mxST0 | mxST1;
+ regmask_now = (regmask_now & ~mask) | ((regmask_now & mxST0) << 1);
+ }
+
+ // if incomplete register is used, clear it on init to avoid
+ // later use of uninitialized upper part in some situations
+ if ((po->flags & OPF_DATA) && po->operand[0].type == OPT_REG
+ && po->operand[0].lmod != OPLM_DWORD)
+ {
+ reg = po->operand[0].reg;
+ ferr_assert(po, reg >= 0);
+
+ if (!(regmask_now & (1 << reg)))
+ *regmask_init |= 1 << reg;
+ }
+
+ regmask_op = po->regmask_src | po->regmask_dst;
+
+ regmask_new = po->regmask_src & ~regmask_now & ~regmask_arg;
+ regmask_new &= ~(1 << xSP);
+ if (g_bp_frame && !(po->flags & OPF_EBP_S))
+ regmask_new &= ~(1 << xBP);
+
+ if (regmask_new != 0)
+ fnote(po, "uninitialized reg mask: %x\n", regmask_new);
+
+ if (regmask_op & (1 << xBP)) {
+ if (g_bp_frame && !(po->flags & OPF_EBP_S)) {
+ if (po->regmask_dst & (1 << xBP))
+ // compiler decided to drop bp frame and use ebp as scratch
+ scan_fwd_set_flags(i + 1, opcnt, i + opcnt * 5, OPF_EBP_S);
+ else
+ regmask_op &= ~(1 << xBP);
+ }
+ }
+
+ regmask_now |= regmask_op;
+ *regmask |= regmask_now;
+
+ // released regs
+ if (po->flags & OPF_FPOP) {
+ mask = mxST0 | mxST1;
+ if (!(regmask_now & mask))
+ ferr(po, "float pop on empty stack?\n");
+ if (regmask_now & mxST1)
+ po->flags |= OPF_FSHIFT;
+ regmask_now = (regmask_now & ~mask) | ((regmask_now & mxST1) >> 1);
+ }
+
+ if (po->flags & OPF_TAIL) {
+ if (regmask_now & (mxST0 | mxST1))
+ ferr(po, "float regs on tail: %x\n", regmask_now);
+
+ // there is support for "conditional tailcall", sort of
+ if (!(po->flags & OPF_CC))
+ return;
+ }
+ }
+}
+
+static void pp_insert_reg_arg(struct parsed_proto *pp, const char *reg)
+{
+ int i;
+
+ for (i = 0; i < pp->argc; i++)
+ if (pp->arg[i].reg == NULL)
+ break;
+
+ if (pp->argc_stack)
+ memmove(&pp->arg[i + 1], &pp->arg[i],
+ sizeof(pp->arg[0]) * pp->argc_stack);
+ memset(&pp->arg[i], 0, sizeof(pp->arg[i]));
+ pp->arg[i].reg = strdup(reg);
+ pp->arg[i].type.name = strdup("int");
+ pp->argc++;
+ pp->argc_reg++;
+}
+
+static void output_std_flags(FILE *fout, struct parsed_op *po,
+ int *pfomask, const char *dst_opr_text)
+{
+ if (*pfomask & (1 << PFO_Z)) {
+ fprintf(fout, "\n cond_z = (%s%s == 0);",
+ lmod_cast_u(po, po->operand[0].lmod), dst_opr_text);
+ *pfomask &= ~(1 << PFO_Z);
+ }
+ if (*pfomask & (1 << PFO_S)) {
+ fprintf(fout, "\n cond_s = (%s%s < 0);",
+ lmod_cast_s(po, po->operand[0].lmod), dst_opr_text);
+ *pfomask &= ~(1 << PFO_S);
+ }
+}
+
+enum {
+ OPP_FORCE_NORETURN = (1 << 0),
+ OPP_SIMPLE_ARGS = (1 << 1),
+ OPP_ALIGN = (1 << 2),
+};
+
+static void output_pp_attrs(FILE *fout, const struct parsed_proto *pp,
+ int flags)
+{
+ const char *cconv = "";
+
+ if (pp->is_fastcall)
+ cconv = "__fastcall ";
+ else if (pp->is_stdcall && pp->argc_reg == 0)
+ cconv = "__stdcall ";
+
+ fprintf(fout, (flags & OPP_ALIGN) ? "%-16s" : "%s", cconv);
+
+ if (pp->is_noreturn || (flags & OPP_FORCE_NORETURN))
+ fprintf(fout, "noreturn ");
+}
+
+static void output_pp(FILE *fout, const struct parsed_proto *pp,
+ int flags)
+{
+ int i;
+
+ fprintf(fout, (flags & OPP_ALIGN) ? "%-5s" : "%s ",
+ pp->ret_type.name);
+ if (pp->is_fptr)
+ fprintf(fout, "(");
+ output_pp_attrs(fout, pp, flags);
+ if (pp->is_fptr)
+ fprintf(fout, "*");
+ fprintf(fout, "%s", pp->name);
+ if (pp->is_fptr)
+ fprintf(fout, ")");
+
+ fprintf(fout, "(");
+ for (i = 0; i < pp->argc; i++) {
+ if (i > 0)
+ fprintf(fout, ", ");
+ if (pp->arg[i].fptr != NULL && !(flags & OPP_SIMPLE_ARGS)) {
+ // func pointer
+ output_pp(fout, pp->arg[i].fptr, 0);
+ }
+ else if (pp->arg[i].type.is_retreg) {
+ fprintf(fout, "u32 *r_%s", pp->arg[i].reg);
+ }
+ else {
+ fprintf(fout, "%s", pp->arg[i].type.name);
+ if (!pp->is_fptr)
+ fprintf(fout, " a%d", i + 1);
+ }
+ }
+ if (pp->is_vararg) {
+ if (i > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "...");
+ }
+ fprintf(fout, ")");
+}
+
+static char *saved_arg_name(char *buf, size_t buf_size, int grp, int num)
+{
+ char buf1[16];
+
+ buf1[0] = 0;
+ if (grp > 0)
+ snprintf(buf1, sizeof(buf1), "%d", grp);
+ snprintf(buf, buf_size, "s%s_a%d", buf1, num);
+
+ return buf;
+}
+
+static void gen_x_cleanup(int opcnt);
+
+static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt)
+{
+ struct parsed_op *po, *delayed_flag_op = NULL, *tmp_op;
+ struct parsed_opr *last_arith_dst = NULL;
+ char buf1[256], buf2[256], buf3[256], cast[64];
+ struct parsed_proto *pp, *pp_tmp;
+ struct parsed_data *pd;
+ unsigned int uval;
+ int save_arg_vars[MAX_ARG_GRP] = { 0, };
+ unsigned char cbits[MAX_OPS / 8];
+ const char *float_type;
+ int cond_vars = 0;
+ int need_tmp_var = 0;
+ int need_tmp64 = 0;
+ int had_decl = 0;
+ int label_pending = 0;
+ int need_double = 0;
+ int regmask_save = 0; // regs saved/restored in this func
+ int regmask_arg; // regs from this function args (fastcall, etc)
+ int regmask_ret; // regs needed on ret
+ int regmask_now; // temp
+ int regmask_init = 0; // regs that need zero initialization
+ int regmask_pp = 0; // regs used in complex push-pop graph
+ int regmask = 0; // used regs
+ int pfomask = 0;
+ int found = 0;
+ int no_output;
+ int i, j, l;
+ int arg;
+ int reg;
+ int ret;
+
+ g_bp_frame = g_sp_frame = g_stack_fsz = 0;
+ g_stack_frame_used = 0;
+ if (g_sct_func_attr & SCTFA_CLEAR_REGS)
+ regmask_init = g_regmask_init;
+
+ g_func_pp = proto_parse(fhdr, funcn, 0);
+ if (g_func_pp == NULL)
+ ferr(ops, "proto_parse failed for '%s'\n", funcn);
+
+ regmask_arg = get_pp_arg_regmask_src(g_func_pp);
+ regmask_ret = get_pp_arg_regmask_dst(g_func_pp);
+
+ // pass1:
+ // - resolve all branches
+ // - parse calls with labels
+ resolve_branches_parse_calls(opcnt);
+
+ // pass2:
+ // - handle ebp/esp frame, remove ops related to it
+ scan_prologue_epilogue(opcnt);
+
+ // pass3:
+ // - remove dead labels
+ // - set regs needed at ret
+ for (i = 0; i < opcnt; i++)
+ {
+ if (g_labels[i] != NULL && g_label_refs[i].i == -1) {
+ free(g_labels[i]);
+ g_labels[i] = NULL;
+ }
+
+ if (ops[i].op == OP_RET)
+ ops[i].regmask_src |= regmask_ret;
+ }
+
+ // pass4:
+ // - process trivial calls
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ continue;
+
+ if (po->op == OP_CALL)
+ {
+ pp = process_call_early(i, opcnt, &j);
+ if (pp != NULL) {
+ if (!(po->flags & OPF_ATAIL))
+ // since we know the args, try to collect them
+ if (collect_call_args_early(po, i, pp, ®mask) != 0)
+ pp = NULL;
+ }
+
+ if (pp != NULL) {
+ if (j >= 0) {
+ // commit esp adjust
+ if (ops[j].op != OP_POP)
+ patch_esp_adjust(&ops[j], pp->argc_stack * 4);
+ else {
+ for (l = 0; l < pp->argc_stack; l++)
+ ops[j + l].flags |= OPF_DONE | OPF_RMD | OPF_NOREGS;
+ }
+ }
+
+ if (strstr(pp->ret_type.name, "int64"))
+ need_tmp64 = 1;
+
+ po->flags |= OPF_DONE;
+ }
+ }
+ }
+
+ // pass5:
+ // - process calls, stage 2
+ // - handle some push/pop pairs
+ // - scan for STD/CLD, propagate DF
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->op == OP_CALL)
+ {
+ if (!(po->flags & OPF_DONE)) {
+ pp = process_call(i, opcnt);
+
+ if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) {
+ // since we know the args, collect them
+ collect_call_args(po, i, pp, ®mask, save_arg_vars,
+ i + opcnt * 2);
+ }
+ // for unresolved, collect after other passes
+ }
+
+ pp = po->pp;
+ ferr_assert(po, pp != NULL);
+
+ po->regmask_src |= get_pp_arg_regmask_src(pp);
+ po->regmask_dst |= get_pp_arg_regmask_dst(pp);
+
+ if (po->regmask_dst & mxST0)
+ po->flags |= OPF_FPUSH;
+
+ if (strstr(pp->ret_type.name, "int64"))
+ need_tmp64 = 1;
+
+ continue;
+ }
+
+ if (po->flags & OPF_DONE)
+ continue;
+
+ if (po->op == OP_PUSH && !(po->flags & OPF_FARG)
+ && !(po->flags & OPF_RSAVE) && po->operand[0].type == OPT_CONST)
+ {
+ scan_for_pop_const(i, opcnt, i + opcnt * 12);
+ }
+ else if (po->op == OP_POP)
+ scan_pushes_for_pop(i, opcnt, ®mask_pp);
+ else if (po->op == OP_STD) {
+ po->flags |= OPF_DF | OPF_RMD | OPF_DONE;
+ scan_propagate_df(i + 1, opcnt);
+ }
+ }
+
+ // pass6:
+ // - find POPs for PUSHes, rm both
+ // - scan for all used registers
+ memset(cbits, 0, sizeof(cbits));
+ reg_use_pass(0, opcnt, cbits, regmask_init, ®mask,
+ 0, ®mask_save, ®mask_init, regmask_arg);
+
+ // pass7:
+ // - find flag set ops for their users
+ // - do unresolved calls
+ // - declare indirect functions
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ continue;
+
+ if (po->flags & OPF_CC)
+ {
+ int setters[16], cnt = 0, branched = 0;
+
+ ret = scan_for_flag_set(i, i + opcnt * 6,
+ &branched, setters, &cnt);
+ if (ret < 0 || cnt <= 0)
+ ferr(po, "unable to trace flag setter(s)\n");
+ if (cnt > ARRAY_SIZE(setters))
+ ferr(po, "too many flag setters\n");
+
+ for (j = 0; j < cnt; j++)
+ {
+ tmp_op = &ops[setters[j]]; // flag setter
+ pfomask = 0;
+
+ // to get nicer code, we try to delay test and cmp;
+ // if we can't because of operand modification, or if we
+ // have arith op, or branch, make it calculate flags explicitly
+ if (tmp_op->op == OP_TEST || tmp_op->op == OP_CMP)
+ {
+ if (branched || scan_for_mod(tmp_op, setters[j] + 1, i, 0) >= 0)
+ pfomask = 1 << po->pfo;
+ }
+ else if (tmp_op->op == OP_CMPS || tmp_op->op == OP_SCAS) {
+ pfomask = 1 << po->pfo;
+ }
+ else {
+ // see if we'll be able to handle based on op result
+ if ((tmp_op->op != OP_AND && tmp_op->op != OP_OR
+ && po->pfo != PFO_Z && po->pfo != PFO_S
+ && po->pfo != PFO_P)
+ || branched
+ || scan_for_mod_opr0(tmp_op, setters[j] + 1, i) >= 0)
+ {
+ pfomask = 1 << po->pfo;
+ }
+
+ if (tmp_op->op == OP_ADD && po->pfo == PFO_C) {
+ propagate_lmod(tmp_op, &tmp_op->operand[0],
+ &tmp_op->operand[1]);
+ if (tmp_op->operand[0].lmod == OPLM_DWORD)
+ need_tmp64 = 1;
+ }
+ }
+ if (pfomask) {
+ tmp_op->pfomask |= pfomask;
+ cond_vars |= pfomask;
+ }
+ // note: may overwrite, currently not a problem
+ po->datap = tmp_op;
+ }
+
+ if (po->op == OP_RCL || po->op == OP_RCR
+ || po->op == OP_ADC || po->op == OP_SBB)
+ cond_vars |= 1 << PFO_C;
+ }
+
+ if (po->op == OP_CMPS || po->op == OP_SCAS) {
+ cond_vars |= 1 << PFO_Z;
+ }
+ else if (po->op == OP_MUL
+ || (po->op == OP_IMUL && po->operand_cnt == 1))
+ {
+ if (po->operand[0].lmod == OPLM_DWORD)
+ need_tmp64 = 1;
+ }
+ else if (po->op == OP_CALL) {
+ // note: resolved non-reg calls are OPF_DONE already
+ pp = po->pp;
+ ferr_assert(po, pp != NULL);
+
+ if (pp->is_unresolved) {
+ int regmask_stack = 0;
+ collect_call_args(po, i, pp, ®mask, save_arg_vars,
+ i + opcnt * 2);
+
+ // this is pretty rough guess:
+ // see ecx and edx were pushed (and not their saved versions)
+ for (arg = 0; arg < pp->argc; arg++) {
+ if (pp->arg[arg].reg != NULL)
+ continue;
+
+ tmp_op = pp->arg[arg].datap;
+ if (tmp_op == NULL)
+ ferr(po, "parsed_op missing for arg%d\n", arg);
+ if (tmp_op->p_argnum == 0 && tmp_op->operand[0].type == OPT_REG)
+ regmask_stack |= 1 << tmp_op->operand[0].reg;
+ }
+
+ if (!((regmask_stack & (1 << xCX))
+ && (regmask_stack & (1 << xDX))))
+ {
+ if (pp->argc_stack != 0
+ || ((regmask | regmask_arg) & ((1 << xCX)|(1 << xDX))))
+ {
+ pp_insert_reg_arg(pp, "ecx");
+ pp->is_fastcall = 1;
+ regmask_init |= 1 << xCX;
+ regmask |= 1 << xCX;
+ }
+ if (pp->argc_stack != 0
+ || ((regmask | regmask_arg) & (1 << xDX)))
+ {
+ pp_insert_reg_arg(pp, "edx");
+ regmask_init |= 1 << xDX;
+ regmask |= 1 << xDX;
+ }
+ }
+
+ // note: __cdecl doesn't fall into is_unresolved category
+ if (pp->argc_stack > 0)
+ pp->is_stdcall = 1;
+ }
+ }
+ else if (po->op == OP_MOV && po->operand[0].pp != NULL
+ && po->operand[1].pp != NULL)
+ {
+ // <var> = offset <something>
+ if ((po->operand[1].pp->is_func || po->operand[1].pp->is_fptr)
+ && !IS_START(po->operand[1].name, "off_"))
+ {
+ if (!po->operand[0].pp->is_fptr)
+ ferr(po, "%s not declared as fptr when it should be\n",
+ po->operand[0].name);
+ if (pp_cmp_func(po->operand[0].pp, po->operand[1].pp)) {
+ pp_print(buf1, sizeof(buf1), po->operand[0].pp);
+ pp_print(buf2, sizeof(buf2), po->operand[1].pp);
+ fnote(po, "var: %s\n", buf1);
+ fnote(po, "func: %s\n", buf2);
+ ferr(po, "^ mismatch\n");
+ }
+ }
+ }
+ else if (po->op == OP_DIV || po->op == OP_IDIV) {
+ if (po->operand[0].lmod == OPLM_DWORD) {
+ // 32bit division is common, look for it
+ if (po->op == OP_DIV)
ret = scan_for_reg_clear(i, xDX);
else
- ret = scan_for_cdq_edx(i);
- if (ret >= 0) {
- out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
- strcpy(buf2, lmod_cast(po, po->operand[0].lmod,
- po->op == OP_IDIV));
- fprintf(fout, " edx = %seax %% %s%s;\n", buf2, buf2, buf1);
- fprintf(fout, " eax = %seax / %s%s;", buf2, buf2, buf1);
+ ret = scan_for_cdq_edx(i);
+ if (ret >= 0)
+ po->flags |= OPF_32BIT;
+ else
+ need_tmp64 = 1;
+ }
+ else
+ need_tmp_var = 1;
+ }
+ else if (po->op == OP_CLD)
+ po->flags |= OPF_RMD | OPF_DONE;
+ else if (po->op == OPP_FTOL) {
+ struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xDX);
+ j = -1;
+ find_next_read(i + 1, opcnt, &opr, i + opcnt * 18, &j);
+ if (j == -1)
+ po->flags |= OPF_32BIT;
+ }
+ else if (po->op == OP_FLD && po->operand[0].lmod == OPLM_QWORD)
+ need_double = 1;
+
+ if (po->op == OP_RCL || po->op == OP_RCR || po->op == OP_XCHG)
+ need_tmp_var = 1;
+ }
+
+ float_type = need_double ? "double" : "float";
+
+ // output starts here
+
+ // define userstack size
+ if (g_func_pp->is_userstack) {
+ fprintf(fout, "#ifndef US_SZ_%s\n", g_func_pp->name);
+ fprintf(fout, "#define US_SZ_%s USERSTACK_SIZE\n", g_func_pp->name);
+ fprintf(fout, "#endif\n");
+ }
+
+ // the function itself
+ ferr_assert(ops, !g_func_pp->is_fptr);
+ output_pp(fout, g_func_pp,
+ (g_ida_func_attr & IDAFA_NORETURN) ? OPP_FORCE_NORETURN : 0);
+ fprintf(fout, "\n{\n");
+
+ // declare indirect functions
+ for (i = 0; i < opcnt; i++) {
+ po = &ops[i];
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->op == OP_CALL) {
+ pp = po->pp;
+ if (pp == NULL)
+ ferr(po, "NULL pp\n");
+
+ if (pp->is_fptr && !(pp->name[0] != 0 && pp->is_arg)) {
+ if (pp->name[0] != 0) {
+ memmove(pp->name + 2, pp->name, strlen(pp->name) + 1);
+ memcpy(pp->name, "i_", 2);
+
+ // might be declared already
+ found = 0;
+ for (j = 0; j < i; j++) {
+ if (ops[j].op == OP_CALL && (pp_tmp = ops[j].pp)) {
+ if (pp_tmp->is_fptr && IS(pp->name, pp_tmp->name)) {
+ found = 1;
+ break;
+ }
+ }
+ }
+ if (found)
+ continue;
+ }
+ else
+ snprintf(pp->name, sizeof(pp->name), "icall%d", i);
+
+ fprintf(fout, " ");
+ output_pp(fout, pp, OPP_SIMPLE_ARGS);
+ fprintf(fout, ";\n");
+ }
+ }
+ }
+
+ // output LUTs/jumptables
+ for (i = 0; i < g_func_pd_cnt; i++) {
+ pd = &g_func_pd[i];
+ fprintf(fout, " static const ");
+ if (pd->type == OPT_OFFSET) {
+ fprintf(fout, "void *jt_%s[] =\n { ", pd->label);
+
+ for (j = 0; j < pd->count; j++) {
+ if (j > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "&&%s", pd->d[j].u.label);
+ }
+ }
+ else {
+ fprintf(fout, "%s %s[] =\n { ",
+ lmod_type_u(ops, pd->lmod), pd->label);
+
+ for (j = 0; j < pd->count; j++) {
+ if (j > 0)
+ fprintf(fout, ", ");
+ fprintf(fout, "%u", pd->d[j].u.val);
+ }
+ }
+ fprintf(fout, " };\n");
+ had_decl = 1;
+ }
+
+ // declare stack frame, va_arg
+ if (g_stack_fsz) {
+ fprintf(fout, " union { u32 d[%d];", (g_stack_fsz + 3) / 4);
+ if (g_func_lmods & (1 << OPLM_WORD))
+ fprintf(fout, " u16 w[%d];", (g_stack_fsz + 1) / 2);
+ if (g_func_lmods & (1 << OPLM_BYTE))
+ fprintf(fout, " u8 b[%d];", g_stack_fsz);
+ if (g_func_lmods & (1 << OPLM_QWORD))
+ fprintf(fout, " double q[%d];", (g_stack_fsz + 7) / 8);
+ fprintf(fout, " } sf;\n");
+ had_decl = 1;
+ }
+
+ if (g_func_pp->is_userstack) {
+ fprintf(fout, " u32 fake_sf[US_SZ_%s / 4];\n", g_func_pp->name);
+ fprintf(fout, " u32 *esp = &fake_sf[sizeof(fake_sf) / 4];\n");
+ had_decl = 1;
+ }
+
+ if (g_func_pp->is_vararg) {
+ fprintf(fout, " va_list ap;\n");
+ had_decl = 1;
+ }
+
+ // declare arg-registers
+ for (i = 0; i < g_func_pp->argc; i++) {
+ if (g_func_pp->arg[i].reg != NULL) {
+ reg = char_array_i(regs_r32,
+ ARRAY_SIZE(regs_r32), g_func_pp->arg[i].reg);
+ if (regmask & (1 << reg)) {
+ if (g_func_pp->arg[i].type.is_retreg)
+ fprintf(fout, " u32 %s = *r_%s;\n",
+ g_func_pp->arg[i].reg, g_func_pp->arg[i].reg);
+ else
+ fprintf(fout, " u32 %s = (u32)a%d;\n",
+ g_func_pp->arg[i].reg, i + 1);
+ }
+ else {
+ if (g_func_pp->arg[i].type.is_retreg)
+ ferr(ops, "retreg '%s' is unused?\n",
+ g_func_pp->arg[i].reg);
+ fprintf(fout, " // %s = a%d; // unused\n",
+ g_func_pp->arg[i].reg, i + 1);
+ }
+ had_decl = 1;
+ }
+ }
+
+ // declare normal registers
+ regmask_now = regmask & ~regmask_arg;
+ regmask_now &= ~(1 << xSP);
+ if (regmask_now & 0x00ff) {
+ for (reg = 0; reg < 8; reg++) {
+ if (regmask_now & (1 << reg)) {
+ fprintf(fout, " u32 %s", regs_r32[reg]);
+ if (regmask_init & (1 << reg))
+ fprintf(fout, " = 0");
+ fprintf(fout, ";\n");
+ had_decl = 1;
+ }
+ }
+ }
+ // ... mmx
+ if (regmask_now & 0xff00) {
+ for (reg = 8; reg < 16; reg++) {
+ if (regmask_now & (1 << reg)) {
+ fprintf(fout, " mmxr %s", regs_r32[reg]);
+ if (regmask_init & (1 << reg))
+ fprintf(fout, " = { 0, }");
+ fprintf(fout, ";\n");
+ had_decl = 1;
+ }
+ }
+ }
+ // ... x87
+ if (regmask_now & 0xff0000) {
+ for (reg = 16; reg < 24; reg++) {
+ if (regmask_now & (1 << reg)) {
+ fprintf(fout, " %s f_st%d", float_type, reg - 16);
+ if (regmask_init & (1 << reg))
+ fprintf(fout, " = 0");
+ fprintf(fout, ";\n");
+ had_decl = 1;
+ }
+ }
+ }
+
+ if (regmask_save) {
+ for (reg = 0; reg < 8; reg++) {
+ if (regmask_save & (1 << reg)) {
+ fprintf(fout, " u32 s_%s;\n", regs_r32[reg]);
+ had_decl = 1;
+ }
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(save_arg_vars); i++) {
+ if (save_arg_vars[i] == 0)
+ continue;
+ for (reg = 0; reg < 32; reg++) {
+ if (save_arg_vars[i] & (1 << reg)) {
+ fprintf(fout, " u32 %s;\n",
+ saved_arg_name(buf1, sizeof(buf1), i, reg + 1));
+ had_decl = 1;
+ }
+ }
+ }
+
+ // declare push-pop temporaries
+ if (regmask_pp) {
+ for (reg = 0; reg < 8; reg++) {
+ if (regmask_pp & (1 << reg)) {
+ fprintf(fout, " u32 pp_%s;\n", regs_r32[reg]);
+ had_decl = 1;
+ }
+ }
+ }
+
+ if (cond_vars) {
+ for (i = 0; i < 8; i++) {
+ if (cond_vars & (1 << i)) {
+ fprintf(fout, " u32 cond_%s;\n", parsed_flag_op_names[i]);
+ had_decl = 1;
+ }
+ }
+ }
+
+ if (need_tmp_var) {
+ fprintf(fout, " u32 tmp;\n");
+ had_decl = 1;
+ }
+
+ if (need_tmp64) {
+ fprintf(fout, " u64 tmp64;\n");
+ had_decl = 1;
+ }
+
+ if (had_decl)
+ fprintf(fout, "\n");
+
+ // do stack clear, if needed
+ if (g_sct_func_attr & SCTFA_CLEAR_SF) {
+ fprintf(fout, " ");
+ if (g_stack_clear_len != 0) {
+ if (g_stack_clear_len <= 4) {
+ for (i = 0; i < g_stack_clear_len; i++)
+ fprintf(fout, "sf.d[%d] = ", g_stack_clear_start + i);
+ fprintf(fout, "0;\n");
+ }
+ else {
+ fprintf(fout, "memset(&sf[%d], 0, %d);\n",
+ g_stack_clear_start, g_stack_clear_len * 4);
+ }
+ }
+ else
+ fprintf(fout, "memset(&sf, 0, sizeof(sf));\n");
+ }
+
+ if (g_func_pp->is_vararg) {
+ if (g_func_pp->argc_stack == 0)
+ ferr(ops, "vararg func without stack args?\n");
+ fprintf(fout, " va_start(ap, a%d);\n", g_func_pp->argc);
+ }
+
+ // output ops
+ for (i = 0; i < opcnt; i++)
+ {
+ if (g_labels[i] != NULL) {
+ fprintf(fout, "\n%s:\n", g_labels[i]);
+ label_pending = 1;
+
+ delayed_flag_op = NULL;
+ last_arith_dst = NULL;
+ }
+
+ po = &ops[i];
+ if (po->flags & OPF_RMD)
+ continue;
+
+ no_output = 0;
+
+ #define assert_operand_cnt(n_) \
+ if (po->operand_cnt != n_) \
+ ferr(po, "operand_cnt is %d/%d\n", po->operand_cnt, n_)
+
+ // conditional/flag using op?
+ if (po->flags & OPF_CC)
+ {
+ int is_delayed = 0;
+
+ tmp_op = po->datap;
+
+ // we go through all this trouble to avoid using parsed_flag_op,
+ // which makes generated code much nicer
+ if (delayed_flag_op != NULL)
+ {
+ out_cmp_test(buf1, sizeof(buf1), delayed_flag_op,
+ po->pfo, po->pfo_inv);
+ is_delayed = 1;
+ }
+ else if (last_arith_dst != NULL
+ && (po->pfo == PFO_Z || po->pfo == PFO_S || po->pfo == PFO_P
+ || (tmp_op && (tmp_op->op == OP_AND || tmp_op->op == OP_OR))
+ ))
+ {
+ out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst);
+ out_test_for_cc(buf1, sizeof(buf1), po, po->pfo, po->pfo_inv,
+ last_arith_dst->lmod, buf3);
+ is_delayed = 1;
+ }
+ else if (tmp_op != NULL) {
+ // use preprocessed flag calc results
+ if (!(tmp_op->pfomask & (1 << po->pfo)))
+ ferr(po, "not prepared for pfo %d\n", po->pfo);
+
+ // note: pfo_inv was not yet applied
+ snprintf(buf1, sizeof(buf1), "(%scond_%s)",
+ po->pfo_inv ? "!" : "", parsed_flag_op_names[po->pfo]);
+ }
+ else {
+ ferr(po, "all methods of finding comparison failed\n");
+ }
+
+ if (po->flags & OPF_JMP) {
+ fprintf(fout, " if %s", buf1);
+ }
+ else if (po->op == OP_RCL || po->op == OP_RCR
+ || po->op == OP_ADC || po->op == OP_SBB)
+ {
+ if (is_delayed)
+ fprintf(fout, " cond_%s = %s;\n",
+ parsed_flag_op_names[po->pfo], buf1);
+ }
+ else if (po->flags & OPF_DATA) { // SETcc
+ out_dst_opr(buf2, sizeof(buf2), po, &po->operand[0]);
+ fprintf(fout, " %s = %s;", buf2, buf1);
+ }
+ else {
+ ferr(po, "unhandled conditional op\n");
+ }
+ }
+
+ pfomask = po->pfomask;
+
+ if (po->flags & (OPF_REPZ|OPF_REPNZ)) {
+ struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xCX);
+ ret = try_resolve_const(i, &opr, opcnt * 7 + i, &uval);
+
+ if (ret != 1 || uval == 0) {
+ // we need initial flags for ecx=0 case..
+ if (i > 0 && ops[i - 1].op == OP_XOR
+ && IS(ops[i - 1].operand[0].name,
+ ops[i - 1].operand[1].name))
+ {
+ fprintf(fout, " cond_z = ");
+ if (pfomask & (1 << PFO_C))
+ fprintf(fout, "cond_c = ");
+ fprintf(fout, "0;\n");
+ }
+ else if (last_arith_dst != NULL) {
+ out_src_opr_u32(buf3, sizeof(buf3), po, last_arith_dst);
+ out_test_for_cc(buf1, sizeof(buf1), po, PFO_Z, 0,
+ last_arith_dst->lmod, buf3);
+ fprintf(fout, " cond_z = %s;\n", buf1);
+ }
+ else
+ ferr(po, "missing initial ZF\n");
+ }
+ }
+
+ switch (po->op)
+ {
+ case OP_MOV:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]);
+ fprintf(fout, " %s = %s;", buf1,
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ buf3, 0));
+ break;
+
+ case OP_LEA:
+ assert_operand_cnt(2);
+ po->operand[1].lmod = OPLM_DWORD; // always
+ fprintf(fout, " %s = %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ NULL, 1));
+ break;
+
+ case OP_MOVZX:
+ assert_operand_cnt(2);
+ fprintf(fout, " %s = %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ break;
+
+ case OP_MOVSX:
+ assert_operand_cnt(2);
+ switch (po->operand[1].lmod) {
+ case OPLM_BYTE:
+ strcpy(buf3, "(s8)");
+ break;
+ case OPLM_WORD:
+ strcpy(buf3, "(s16)");
+ break;
+ default:
+ ferr(po, "invalid src lmod: %d\n", po->operand[1].lmod);
+ }
+ fprintf(fout, " %s = %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ buf3, 0));
+ break;
+
+ case OP_XCHG:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ fprintf(fout, " tmp = %s;",
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], "", 0));
+ fprintf(fout, " %s = %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0));
+ fprintf(fout, " %s = %stmp;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]),
+ default_cast_to(buf3, sizeof(buf3), &po->operand[1]));
+ snprintf(g_comment, sizeof(g_comment), "xchg");
+ break;
+
+ case OP_NOT:
+ assert_operand_cnt(1);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ fprintf(fout, " %s = ~%s;", buf1, buf1);
+ break;
+
+ case OP_XLAT:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
+ fprintf(fout, " %s = *(u8 *)(%s + %s);", buf1, buf2, buf1);
+ strcpy(g_comment, "xlat");
+ break;
+
+ case OP_CDQ:
+ assert_operand_cnt(2);
+ fprintf(fout, " %s = (s32)%s >> 31;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ strcpy(g_comment, "cdq");
+ break;
+
+ case OP_LODS:
+ if (po->flags & OPF_REP) {
+ assert_operand_cnt(3);
+ // hmh..
+ ferr(po, "TODO\n");
+ }
+ else {
+ assert_operand_cnt(2);
+ fprintf(fout, " %s = %sesi; esi %c= %d;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[1]),
+ lmod_cast_u_ptr(po, po->operand[1].lmod),
+ (po->flags & OPF_DF) ? '-' : '+',
+ lmod_bytes(po, po->operand[1].lmod));
+ strcpy(g_comment, "lods");
+ }
+ break;
+
+ case OP_STOS:
+ if (po->flags & OPF_REP) {
+ assert_operand_cnt(3);
+ fprintf(fout, " for (; ecx != 0; ecx--, edi %c= %d)\n",
+ (po->flags & OPF_DF) ? '-' : '+',
+ lmod_bytes(po, po->operand[1].lmod));
+ fprintf(fout, " %sedi = eax;",
+ lmod_cast_u_ptr(po, po->operand[1].lmod));
+ strcpy(g_comment, "rep stos");
+ }
+ else {
+ assert_operand_cnt(2);
+ fprintf(fout, " %sedi = eax; edi %c= %d;",
+ lmod_cast_u_ptr(po, po->operand[1].lmod),
+ (po->flags & OPF_DF) ? '-' : '+',
+ lmod_bytes(po, po->operand[1].lmod));
+ strcpy(g_comment, "stos");
+ }
+ break;
+
+ case OP_MOVS:
+ j = lmod_bytes(po, po->operand[0].lmod);
+ strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
+ l = (po->flags & OPF_DF) ? '-' : '+';
+ if (po->flags & OPF_REP) {
+ assert_operand_cnt(3);
+ fprintf(fout,
+ " for (; ecx != 0; ecx--, edi %c= %d, esi %c= %d)\n",
+ l, j, l, j);
+ fprintf(fout,
+ " %sedi = %sesi;", buf1, buf1);
+ strcpy(g_comment, "rep movs");
+ }
+ else {
+ assert_operand_cnt(2);
+ fprintf(fout, " %sedi = %sesi; edi %c= %d; esi %c= %d;",
+ buf1, buf1, l, j, l, j);
+ strcpy(g_comment, "movs");
+ }
+ break;
+
+ case OP_CMPS:
+ // repe ~ repeat while ZF=1
+ j = lmod_bytes(po, po->operand[0].lmod);
+ strcpy(buf1, lmod_cast_u_ptr(po, po->operand[0].lmod));
+ l = (po->flags & OPF_DF) ? '-' : '+';
+ if (po->flags & OPF_REP) {
+ assert_operand_cnt(3);
+ fprintf(fout,
+ " for (; ecx != 0; ecx--) {\n");
+ if (pfomask & (1 << PFO_C)) {
+ // ugh..
+ fprintf(fout,
+ " cond_c = %sesi < %sedi;\n", buf1, buf1);
+ pfomask &= ~(1 << PFO_C);
+ }
+ fprintf(fout,
+ " cond_z = (%sesi == %sedi); esi %c= %d, edi %c= %d;\n",
+ buf1, buf1, l, j, l, j);
+ fprintf(fout,
+ " if (cond_z %s 0) break;\n",
+ (po->flags & OPF_REPZ) ? "==" : "!=");
+ fprintf(fout,
+ " }");
+ snprintf(g_comment, sizeof(g_comment), "rep%s cmps",
+ (po->flags & OPF_REPZ) ? "e" : "ne");
+ }
+ else {
+ assert_operand_cnt(2);
+ fprintf(fout,
+ " cond_z = (%sesi == %sedi); esi %c= %d; edi %c= %d;",
+ buf1, buf1, l, j, l, j);
+ strcpy(g_comment, "cmps");
+ }
+ pfomask &= ~(1 << PFO_Z);
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_SCAS:
+ // only does ZF (for now)
+ // repe ~ repeat while ZF=1
+ j = lmod_bytes(po, po->operand[1].lmod);
+ l = (po->flags & OPF_DF) ? '-' : '+';
+ if (po->flags & OPF_REP) {
+ assert_operand_cnt(3);
+ fprintf(fout,
+ " for (; ecx != 0; ecx--) {\n");
+ fprintf(fout,
+ " cond_z = (%seax == %sedi); edi %c= %d;\n",
+ lmod_cast_u(po, po->operand[1].lmod),
+ lmod_cast_u_ptr(po, po->operand[1].lmod), l, j);
+ fprintf(fout,
+ " if (cond_z %s 0) break;\n",
+ (po->flags & OPF_REPZ) ? "==" : "!=");
+ fprintf(fout,
+ " }");
+ snprintf(g_comment, sizeof(g_comment), "rep%s scas",
+ (po->flags & OPF_REPZ) ? "e" : "ne");
+ }
+ else {
+ assert_operand_cnt(2);
+ fprintf(fout, " cond_z = (%seax == %sedi); edi %c= %d;",
+ lmod_cast_u(po, po->operand[1].lmod),
+ lmod_cast_u_ptr(po, po->operand[1].lmod), l, j);
+ strcpy(g_comment, "scas");
+ }
+ pfomask &= ~(1 << PFO_Z);
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ // arithmetic w/flags
+ case OP_AND:
+ if (po->operand[1].type == OPT_CONST && !po->operand[1].val)
+ goto dualop_arith_const;
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ goto dualop_arith;
+
+ case OP_OR:
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ if (po->operand[1].type == OPT_CONST) {
+ j = lmod_bytes(po, po->operand[0].lmod);
+ if (((1ull << j * 8) - 1) == po->operand[1].val)
+ goto dualop_arith_const;
+ }
+ goto dualop_arith;
+
+ dualop_arith:
+ assert_operand_cnt(2);
+ fprintf(fout, " %s %s= %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ op_to_c(po),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ dualop_arith_const:
+ // and 0, or ~0 used instead mov
+ assert_operand_cnt(2);
+ fprintf(fout, " %s = %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1],
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0));
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_SHL:
+ case OP_SHR:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (pfomask & (1 << PFO_C)) {
+ if (po->operand[1].type == OPT_CONST) {
+ l = lmod_bytes(po, po->operand[0].lmod) * 8;
+ j = po->operand[1].val;
+ j %= l;
+ if (j != 0) {
+ if (po->op == OP_SHL)
+ j = l - j;
+ else
+ j -= 1;
+ fprintf(fout, " cond_c = (%s >> %d) & 1;\n",
+ buf1, j);
+ }
+ else
+ ferr(po, "zero shift?\n");
+ }
+ else
+ ferr(po, "TODO\n");
+ pfomask &= ~(1 << PFO_C);
+ }
+ fprintf(fout, " %s %s= %s", buf1, op_to_c(po),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ if (po->operand[1].type != OPT_CONST)
+ fprintf(fout, " & 0x1f");
+ fprintf(fout, ";");
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_SAR:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ fprintf(fout, " %s = %s%s >> %s;", buf1,
+ lmod_cast_s(po, po->operand[0].lmod), buf1,
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_SHLD:
+ case OP_SHRD:
+ assert_operand_cnt(3);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ l = lmod_bytes(po, po->operand[0].lmod) * 8;
+ out_src_opr_u32(buf3, sizeof(buf3), po, &po->operand[2]);
+ if (po->operand[2].type != OPT_CONST) {
+ // no handling for "undefined" case, hopefully not needed
+ snprintf(buf2, sizeof(buf2), "(%s & 0x1f)", buf3);
+ strcpy(buf3, buf2);
+ }
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->op == OP_SHLD) {
+ fprintf(fout, " %s <<= %s; %s |= %s >> (%d - %s);",
+ buf1, buf3, buf1, buf2, l, buf3);
+ strcpy(g_comment, "shld");
+ }
+ else {
+ fprintf(fout, " %s >>= %s; %s |= %s << (%d - %s);",
+ buf1, buf3, buf1, buf2, l, buf3);
+ strcpy(g_comment, "shrd");
+ }
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_ROL:
+ case OP_ROR:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->operand[1].type == OPT_CONST) {
+ j = po->operand[1].val;
+ j %= lmod_bytes(po, po->operand[0].lmod) * 8;
+ fprintf(fout, po->op == OP_ROL ?
+ " %s = (%s << %d) | (%s >> %d);" :
+ " %s = (%s >> %d) | (%s << %d);",
+ buf1, buf1, j, buf1,
+ lmod_bytes(po, po->operand[0].lmod) * 8 - j);
+ }
+ else
+ ferr(po, "TODO\n");
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_RCL:
+ case OP_RCR:
+ assert_operand_cnt(2);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ l = lmod_bytes(po, po->operand[0].lmod) * 8;
+ if (po->operand[1].type == OPT_CONST) {
+ j = po->operand[1].val % l;
+ if (j == 0)
+ ferr(po, "zero rotate\n");
+ fprintf(fout, " tmp = (%s >> %d) & 1;\n",
+ buf1, (po->op == OP_RCL) ? (l - j) : (j - 1));
+ if (po->op == OP_RCL) {
+ fprintf(fout,
+ " %s = (%s << %d) | (cond_c << %d)",
+ buf1, buf1, j, j - 1);
+ if (j != 1)
+ fprintf(fout, " | (%s >> %d)", buf1, l + 1 - j);
+ }
+ else {
+ fprintf(fout,
+ " %s = (%s >> %d) | (cond_c << %d)",
+ buf1, buf1, j, l - j);
+ if (j != 1)
+ fprintf(fout, " | (%s << %d)", buf1, l + 1 - j);
+ }
+ fprintf(fout, ";\n");
+ fprintf(fout, " cond_c = tmp;");
+ }
+ else
+ ferr(po, "TODO\n");
+ strcpy(g_comment, (po->op == OP_RCL) ? "rcl" : "rcr");
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_XOR:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ if (IS(opr_name(po, 0), opr_name(po, 1))) {
+ // special case for XOR
+ if (pfomask & (1 << PFO_BE)) { // weird, but it happens..
+ fprintf(fout, " cond_be = 1;\n");
+ pfomask &= ~(1 << PFO_BE);
+ }
+ fprintf(fout, " %s = 0;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]));
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+ }
+ goto dualop_arith;
+
+ case OP_ADD:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ if (pfomask & (1 << PFO_C)) {
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
+ if (po->operand[0].lmod == OPLM_DWORD) {
+ fprintf(fout, " tmp64 = (u64)%s + %s;\n", buf1, buf2);
+ fprintf(fout, " cond_c = tmp64 >> 32;\n");
+ fprintf(fout, " %s = (u32)tmp64;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]));
+ strcat(g_comment, " add64");
+ }
+ else {
+ fprintf(fout, " cond_c = ((u32)%s + %s) >> %d;\n",
+ buf1, buf2, lmod_bytes(po, po->operand[0].lmod) * 8);
+ fprintf(fout, " %s += %s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ buf2);
+ }
+ pfomask &= ~(1 << PFO_C);
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+ }
+ goto dualop_arith;
+
+ case OP_SUB:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ if (pfomask & ~((1 << PFO_Z) | (1 << PFO_S))) {
+ for (j = 0; j <= PFO_LE; j++) {
+ if (!(pfomask & (1 << j)))
+ continue;
+ if (j == PFO_Z || j == PFO_S)
+ continue;
+
+ out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0);
+ fprintf(fout, " cond_%s = %s;\n",
+ parsed_flag_op_names[j], buf1);
+ pfomask &= ~(1 << j);
+ }
+ }
+ goto dualop_arith;
+
+ case OP_ADC:
+ case OP_SBB:
+ assert_operand_cnt(2);
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->op == OP_SBB
+ && IS(po->operand[0].name, po->operand[1].name))
+ {
+ // avoid use of unitialized var
+ fprintf(fout, " %s = -cond_c;", buf1);
+ // carry remains what it was
+ pfomask &= ~(1 << PFO_C);
+ }
+ else {
+ fprintf(fout, " %s %s= %s + cond_c;", buf1, op_to_c(po),
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]));
+ }
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_BSF:
+ assert_operand_cnt(2);
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[1]);
+ fprintf(fout, " %s = %s ? __builtin_ffs(%s) - 1 : 0;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ buf2, buf2);
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ strcat(g_comment, " bsf");
+ break;
+
+ case OP_DEC:
+ if (pfomask & ~(PFOB_S | PFOB_S | PFOB_C)) {
+ for (j = 0; j <= PFO_LE; j++) {
+ if (!(pfomask & (1 << j)))
+ continue;
+ if (j == PFO_Z || j == PFO_S || j == PFO_C)
+ continue;
+
+ out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0);
+ fprintf(fout, " cond_%s = %s;\n",
+ parsed_flag_op_names[j], buf1);
+ pfomask &= ~(1 << j);
+ }
+ }
+ // fallthrough
+
+ case OP_INC:
+ if (pfomask & (1 << PFO_C))
+ // carry is unaffected by inc/dec.. wtf?
+ ferr(po, "carry propagation needed\n");
+
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->operand[0].type == OPT_REG) {
+ strcpy(buf2, po->op == OP_INC ? "++" : "--");
+ fprintf(fout, " %s%s;", buf1, buf2);
+ }
+ else {
+ strcpy(buf2, po->op == OP_INC ? "+" : "-");
+ fprintf(fout, " %s %s= 1;", buf1, buf2);
+ }
+ output_std_flags(fout, po, &pfomask, buf1);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_NEG:
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]);
+ fprintf(fout, " %s = -%s%s;", buf1,
+ lmod_cast_s(po, po->operand[0].lmod), buf2);
+ last_arith_dst = &po->operand[0];
+ delayed_flag_op = NULL;
+ if (pfomask & (1 << PFO_C)) {
+ fprintf(fout, "\n cond_c = (%s != 0);", buf1);
+ pfomask &= ~(1 << PFO_C);
+ }
+ break;
+
+ case OP_IMUL:
+ if (po->operand_cnt == 2) {
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ goto dualop_arith;
+ }
+ if (po->operand_cnt == 3)
+ ferr(po, "TODO imul3\n");
+ // fallthrough
+ case OP_MUL:
+ assert_operand_cnt(1);
+ switch (po->operand[0].lmod) {
+ case OPLM_DWORD:
+ strcpy(buf1, po->op == OP_IMUL ? "(s64)(s32)" : "(u64)");
+ fprintf(fout, " tmp64 = %seax * %s%s;\n", buf1, buf1,
+ out_src_opr_u32(buf2, sizeof(buf2), po, &po->operand[0]));
+ fprintf(fout, " edx = tmp64 >> 32;\n");
+ fprintf(fout, " eax = tmp64;");
+ break;
+ case OPLM_BYTE:
+ strcpy(buf1, po->op == OP_IMUL ? "(s16)(s8)" : "(u16)(u8)");
+ fprintf(fout, " LOWORD(eax) = %seax * %s;", buf1,
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[0],
+ buf1, 0));
+ break;
+ default:
+ ferr(po, "TODO: unhandled mul type\n");
+ break;
+ }
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_DIV:
+ case OP_IDIV:
+ assert_operand_cnt(1);
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
+ strcpy(cast, lmod_cast(po, po->operand[0].lmod,
+ po->op == OP_IDIV));
+ switch (po->operand[0].lmod) {
+ case OPLM_DWORD:
+ if (po->flags & OPF_32BIT)
+ snprintf(buf2, sizeof(buf2), "%seax", cast);
+ else {
+ fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n");
+ snprintf(buf2, sizeof(buf2), "%stmp64",
+ (po->op == OP_IDIV) ? "(s64)" : "");
+ }
+ if (po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xDX)
+ {
+ fprintf(fout, " eax = %s / %s%s;\n", buf2, cast, buf1);
+ fprintf(fout, " edx = %s %% %s%s;", buf2, cast, buf1);
+ }
+ else {
+ fprintf(fout, " edx = %s %% %s%s;\n", buf2, cast, buf1);
+ fprintf(fout, " eax = %s / %s%s;", buf2, cast, buf1);
+ }
+ break;
+ case OPLM_WORD:
+ fprintf(fout, " tmp = (edx << 16) | (eax & 0xffff);\n");
+ snprintf(buf2, sizeof(buf2), "%stmp",
+ (po->op == OP_IDIV) ? "(s32)" : "");
+ if (po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xDX)
+ {
+ fprintf(fout, " LOWORD(eax) = %s / %s%s;\n",
+ buf2, cast, buf1);
+ fprintf(fout, " LOWORD(edx) = %s %% %s%s;",
+ buf2, cast, buf1);
+ }
+ else {
+ fprintf(fout, " LOWORD(edx) = %s %% %s%s;\n",
+ buf2, cast, buf1);
+ fprintf(fout, " LOWORD(eax) = %s / %s%s;",
+ buf2, cast, buf1);
+ }
+ strcat(g_comment, " div16");
+ break;
+ default:
+ ferr(po, "unhandled div lmod %d\n", po->operand[0].lmod);
+ }
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_TEST:
+ case OP_CMP:
+ propagate_lmod(po, &po->operand[0], &po->operand[1]);
+ if (pfomask != 0) {
+ for (j = 0; j < 8; j++) {
+ if (pfomask & (1 << j)) {
+ out_cmp_test(buf1, sizeof(buf1), po, j, 0);
+ fprintf(fout, " cond_%s = %s;",
+ parsed_flag_op_names[j], buf1);
+ }
+ }
+ pfomask = 0;
+ }
+ else
+ no_output = 1;
+ last_arith_dst = NULL;
+ delayed_flag_op = po;
+ break;
+
+ case OP_SCC:
+ // SETcc - should already be handled
+ break;
+
+ // note: we reuse OP_Jcc for SETcc, only flags differ
+ case OP_JCC:
+ fprintf(fout, "\n goto %s;", po->operand[0].name);
+ break;
+
+ case OP_JECXZ:
+ fprintf(fout, " if (ecx == 0)\n");
+ fprintf(fout, " goto %s;", po->operand[0].name);
+ strcat(g_comment, " jecxz");
+ break;
+
+ case OP_LOOP:
+ fprintf(fout, " if (--ecx != 0)\n");
+ fprintf(fout, " goto %s;", po->operand[0].name);
+ strcat(g_comment, " loop");
+ break;
+
+ case OP_JMP:
+ assert_operand_cnt(1);
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+
+ if (po->operand[0].type == OPT_REGMEM) {
+ ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]",
+ buf1, buf2);
+ if (ret != 2)
+ ferr(po, "parse failure for jmp '%s'\n",
+ po->operand[0].name);
+ fprintf(fout, " goto *jt_%s[%s];", buf1, buf2);
+ break;
+ }
+ else if (po->operand[0].type != OPT_LABEL)
+ ferr(po, "unhandled jmp type\n");
+
+ fprintf(fout, " goto %s;", po->operand[0].name);
+ break;
+
+ case OP_CALL:
+ assert_operand_cnt(1);
+ pp = po->pp;
+ my_assert_not(pp, NULL);
+
+ strcpy(buf3, " ");
+ if (po->flags & OPF_CC) {
+ // we treat conditional branch to another func
+ // (yes such code exists..) as conditional tailcall
+ strcat(buf3, " ");
+ fprintf(fout, " {\n");
+ }
+
+ if (pp->is_fptr && !pp->is_arg) {
+ fprintf(fout, "%s%s = %s;\n", buf3, pp->name,
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
+ "(void *)", 0));
+ if (pp->is_unresolved)
+ fprintf(fout, "%sunresolved_call(\"%s:%d\", %s);\n",
+ buf3, asmfn, po->asmln, pp->name);
+ }
+
+ fprintf(fout, "%s", buf3);
+ if (strstr(pp->ret_type.name, "int64")) {
+ if (po->flags & OPF_TAIL)
+ ferr(po, "int64 and tail?\n");
+ fprintf(fout, "tmp64 = ");
+ }
+ else if (!IS(pp->ret_type.name, "void")) {
+ if (po->flags & OPF_TAIL) {
+ if (regmask_ret & mxAX) {
+ fprintf(fout, "return ");
+ if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr)
+ fprintf(fout, "(%s)", g_func_pp->ret_type.name);
+ }
+ else if (regmask_ret & mxST0)
+ ferr(po, "float tailcall\n");
+ }
+ else if (po->regmask_dst & mxAX) {
+ fprintf(fout, "eax = ");
+ if (pp->ret_type.is_ptr)
+ fprintf(fout, "(u32)");
+ }
+ else if (po->regmask_dst & mxST0) {
+ fprintf(fout, "f_st0 = ");
+ }
+ }
+
+ if (pp->name[0] == 0)
+ ferr(po, "missing pp->name\n");
+ fprintf(fout, "%s%s(", pp->name,
+ pp->has_structarg ? "_sa" : "");
+
+ if (po->flags & OPF_ATAIL) {
+ if (pp->argc_stack != g_func_pp->argc_stack
+ || (pp->argc_stack > 0
+ && pp->is_stdcall != g_func_pp->is_stdcall))
+ ferr(po, "incompatible tailcall\n");
+ if (g_func_pp->has_retreg)
+ ferr(po, "TODO: retreg+tailcall\n");
+
+ for (arg = j = 0; arg < pp->argc; arg++) {
+ if (arg > 0)
+ fprintf(fout, ", ");
+
+ cast[0] = 0;
+ if (pp->arg[arg].type.is_ptr)
+ snprintf(cast, sizeof(cast), "(%s)",
+ pp->arg[arg].type.name);
+
+ if (pp->arg[arg].reg != NULL) {
+ fprintf(fout, "%s%s", cast, pp->arg[arg].reg);
+ continue;
+ }
+ // stack arg
+ for (; j < g_func_pp->argc; j++)
+ if (g_func_pp->arg[j].reg == NULL)
+ break;
+ fprintf(fout, "%sa%d", cast, j + 1);
+ j++;
+ }
+ }
+ else {
+ for (arg = 0; arg < pp->argc; arg++) {
+ if (arg > 0)
+ fprintf(fout, ", ");
+
+ cast[0] = 0;
+ if (pp->arg[arg].type.is_ptr)
+ snprintf(cast, sizeof(cast), "(%s)",
+ pp->arg[arg].type.name);
+
+ if (pp->arg[arg].reg != NULL) {
+ if (pp->arg[arg].type.is_retreg)
+ fprintf(fout, "&%s", pp->arg[arg].reg);
+ else
+ fprintf(fout, "%s%s", cast, pp->arg[arg].reg);
+ continue;
+ }
+
+ // stack arg
+ tmp_op = pp->arg[arg].datap;
+ if (tmp_op == NULL)
+ ferr(po, "parsed_op missing for arg%d\n", arg);
+
+ if (tmp_op->flags & OPF_VAPUSH) {
+ fprintf(fout, "ap");
+ }
+ else if (tmp_op->p_argpass != 0) {
+ fprintf(fout, "a%d", tmp_op->p_argpass);
+ }
+ else if (tmp_op->p_argnum != 0) {
+ fprintf(fout, "%s%s", cast,
+ saved_arg_name(buf1, sizeof(buf1),
+ tmp_op->p_arggrp, tmp_op->p_argnum));
+ }
+ else {
+ fprintf(fout, "%s",
+ out_src_opr(buf1, sizeof(buf1),
+ tmp_op, &tmp_op->operand[0], cast, 0));
+ }
+ }
+ }
+ fprintf(fout, ");");
+
+ if (strstr(pp->ret_type.name, "int64")) {
+ fprintf(fout, "\n");
+ fprintf(fout, "%sedx = tmp64 >> 32;\n", buf3);
+ fprintf(fout, "%seax = tmp64;", buf3);
+ }
+
+ if (pp->is_unresolved) {
+ snprintf(buf2, sizeof(buf2), " unresolved %dreg",
+ pp->argc_reg);
+ strcat(g_comment, buf2);
+ }
+
+ if (po->flags & OPF_TAIL) {
+ ret = 0;
+ if (i == opcnt - 1 || pp->is_noreturn)
+ ret = 0;
+ else if (IS(pp->ret_type.name, "void"))
+ ret = 1;
+ else if (!(regmask_ret & (1 << xAX)))
+ ret = 1;
+ // else already handled as 'return f()'
+
+ if (ret) {
+ fprintf(fout, "\n%sreturn;", buf3);
+ strcat(g_comment, " ^ tailcall");
+ }
+ else
+ strcat(g_comment, " tailcall");
+
+ if ((regmask_ret & (1 << xAX))
+ && IS(pp->ret_type.name, "void") && !pp->is_noreturn)
+ {
+ ferr(po, "int func -> void func tailcall?\n");
+ }
+ }
+ if (pp->is_noreturn)
+ strcat(g_comment, " noreturn");
+ if ((po->flags & OPF_ATAIL) && pp->argc_stack > 0)
+ strcat(g_comment, " argframe");
+ if (po->flags & OPF_CC)
+ strcat(g_comment, " cond");
+
+ if (po->flags & OPF_CC)
+ fprintf(fout, "\n }");
+
+ delayed_flag_op = NULL;
+ last_arith_dst = NULL;
+ break;
+
+ case OP_RET:
+ if (g_func_pp->is_vararg)
+ fprintf(fout, " va_end(ap);\n");
+ if (g_func_pp->has_retreg) {
+ for (arg = 0; arg < g_func_pp->argc; arg++)
+ if (g_func_pp->arg[arg].type.is_retreg)
+ fprintf(fout, " *r_%s = %s;\n",
+ g_func_pp->arg[arg].reg, g_func_pp->arg[arg].reg);
+ }
+
+ if (!(regmask_ret & (1 << xAX))) {
+ if (i != opcnt - 1 || label_pending)
+ fprintf(fout, " return;");
+ }
+ else if (g_func_pp->ret_type.is_ptr) {
+ fprintf(fout, " return (%s)eax;",
+ g_func_pp->ret_type.name);
+ }
+ else if (IS(g_func_pp->ret_type.name, "__int64"))
+ fprintf(fout, " return ((u64)edx << 32) | eax;");
+ else
+ fprintf(fout, " return eax;");
+
+ last_arith_dst = NULL;
+ delayed_flag_op = NULL;
+ break;
+
+ case OP_PUSH:
+ out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->p_argnum != 0) {
+ // special case - saved func arg
+ fprintf(fout, " %s = %s;",
+ saved_arg_name(buf2, sizeof(buf2),
+ po->p_arggrp, po->p_argnum), buf1);
+ break;
+ }
+ else if (po->flags & OPF_RSAVE) {
+ fprintf(fout, " s_%s = %s;", buf1, buf1);
+ break;
+ }
+ else if (po->flags & OPF_PPUSH) {
+ tmp_op = po->datap;
+ ferr_assert(po, tmp_op != NULL);
+ out_dst_opr(buf2, sizeof(buf2), po, &tmp_op->operand[0]);
+ fprintf(fout, " pp_%s = %s;", buf2, buf1);
+ break;
+ }
+ else if (g_func_pp->is_userstack) {
+ fprintf(fout, " *(--esp) = %s;", buf1);
+ break;
+ }
+ if (!(g_ida_func_attr & IDAFA_NORETURN))
+ ferr(po, "stray push encountered\n");
+ no_output = 1;
+ break;
+
+ case OP_POP:
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ if (po->flags & OPF_RSAVE) {
+ fprintf(fout, " %s = s_%s;", buf1, buf1);
+ break;
+ }
+ else if (po->flags & OPF_PPUSH) {
+ // push/pop graph / non-const
+ ferr_assert(po, po->datap == NULL);
+ fprintf(fout, " %s = pp_%s;", buf1, buf1);
+ break;
+ }
+ else if (po->datap != NULL) {
+ // push/pop pair
+ tmp_op = po->datap;
+ fprintf(fout, " %s = %s;", buf1,
+ out_src_opr(buf2, sizeof(buf2),
+ tmp_op, &tmp_op->operand[0],
+ default_cast_to(buf3, sizeof(buf3), &po->operand[0]), 0));
+ break;
+ }
+ else if (g_func_pp->is_userstack) {
+ fprintf(fout, " %s = *esp++;", buf1);
+ break;
+ }
+ else
+ ferr(po, "stray pop encountered\n");
+ break;
+
+ case OP_NOP:
+ no_output = 1;
+ break;
+
+ // x87
+ case OP_FLD:
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_st1 = f_st0;\n");
+ if (po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xST0)
+ {
+ strcat(g_comment, " fld st");
+ break;
+ }
+ fprintf(fout, " f_st0 = %s;",
+ out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0]));
+ strcat(g_comment, " fld");
+ break;
+
+ case OP_FILD:
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_st1 = f_st0;\n");
+ fprintf(fout, " f_st0 = (%s)%s;", float_type,
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
+ lmod_cast(po, po->operand[0].lmod, 1), 0));
+ strcat(g_comment, " fild");
+ break;
+
+ case OP_FLDc:
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_st1 = f_st0;\n");
+ fprintf(fout, " f_st0 = ");
+ switch (po->operand[0].val) {
+ case X87_CONST_1: fprintf(fout, "1.0;"); break;
+ case X87_CONST_Z: fprintf(fout, "0.0;"); break;
+ default: ferr(po, "TODO\n"); break;
+ }
+ break;
+
+ case OP_FST:
+ if ((po->flags & OPF_FPOP) && po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xST0)
+ {
+ no_output = 1;
+ break;
+ }
+ fprintf(fout, " %s = f_st0;",
+ out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0]));
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, "\n f_st0 = f_st1;");
+ strcat(g_comment, " fst");
+ break;
+
+ case OP_FADD:
+ case OP_FDIV:
+ case OP_FMUL:
+ case OP_FSUB:
+ switch (po->op) {
+ case OP_FADD: j = '+'; break;
+ case OP_FDIV: j = '/'; break;
+ case OP_FMUL: j = '*'; break;
+ case OP_FSUB: j = '-'; break;
+ default: j = 'x'; break;
+ }
+ if (po->flags & OPF_FSHIFT) {
+ fprintf(fout, " f_st0 = f_st1 %c f_st0;", j);
+ }
+ else {
+ fprintf(fout, " %s %c= %s;",
+ out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0]),
+ j,
+ out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1]));
+ }
+ break;
+
+ case OP_FDIVR:
+ case OP_FSUBR:
+ if (po->flags & OPF_FSHIFT)
+ snprintf(buf1, sizeof(buf1), "f_st0");
+ else
+ out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0]);
+ fprintf(fout, " %s = %s %c %s;", buf1,
+ out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1]),
+ po->op == OP_FDIVR ? '/' : '-',
+ out_src_opr_float(buf3, sizeof(buf3), po, &po->operand[0]));
+ break;
+
+ case OP_FIADD:
+ case OP_FIDIV:
+ case OP_FIMUL:
+ case OP_FISUB:
+ switch (po->op) {
+ case OP_FIADD: j = '+'; break;
+ case OP_FIDIV: j = '/'; break;
+ case OP_FIMUL: j = '*'; break;
+ case OP_FISUB: j = '-'; break;
+ default: j = 'x'; break;
+ }
+ fprintf(fout, " f_st0 %c= (%s)%s;", j, float_type,
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
+ lmod_cast(po, po->operand[0].lmod, 1), 0));
+ break;
+
+ case OP_FIDIVR:
+ case OP_FISUBR:
+ fprintf(fout, " f_st0 = %s %c f_st0;",
+ out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1]),
+ po->op == OP_FIDIVR ? '/' : '-');
+ break;
+
+ case OP_FCOS:
+ fprintf(fout, " f_st0 = cos%s(f_st0);",
+ need_double ? "" : "f");
+ break;
+
+ case OP_FPATAN:
+ fprintf(fout, " f_st0 = atan%s(f_st1 / f_st0);",
+ need_double ? "" : "f");
+ break;
+
+ case OP_FSIN:
+ fprintf(fout, " f_st0 = sin%s(f_st0);",
+ need_double ? "" : "f");
+ break;
+
+ case OP_FSQRT:
+ fprintf(fout, " f_st0 = sqrt%s(f_st0);",
+ need_double ? "" : "f");
+ break;
+
+ case OPP_FTOL:
+ ferr_assert(po, po->flags & OPF_32BIT);
+ fprintf(fout, " eax = (s32)f_st0;");
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, "\n f_st0 = f_st1;");
+ strcat(g_comment, " ftol");
+ break;
+
+ // mmx
+ case OP_EMMS:
+ strcpy(g_comment, " (emms)");
+ break;
+
+ default:
+ no_output = 1;
+ ferr(po, "unhandled op type %d, flags %x\n",
+ po->op, po->flags);
+ break;
+ }
+
+ if (g_comment[0] != 0) {
+ char *p = g_comment;
+ while (my_isblank(*p))
+ p++;
+ fprintf(fout, " // %s", p);
+ g_comment[0] = 0;
+ no_output = 0;
+ }
+ if (!no_output)
+ fprintf(fout, "\n");
+
+ // some sanity checking
+ if (po->flags & OPF_REP) {
+ if (po->op != OP_STOS && po->op != OP_MOVS
+ && po->op != OP_CMPS && po->op != OP_SCAS)
+ ferr(po, "unexpected rep\n");
+ if (!(po->flags & (OPF_REPZ|OPF_REPNZ))
+ && (po->op == OP_CMPS || po->op == OP_SCAS))
+ ferr(po, "cmps/scas with plain rep\n");
+ }
+ if ((po->flags & (OPF_REPZ|OPF_REPNZ))
+ && po->op != OP_CMPS && po->op != OP_SCAS)
+ ferr(po, "unexpected repz/repnz\n");
+
+ if (pfomask != 0)
+ ferr(po, "missed flag calc, pfomask=%x\n", pfomask);
+
+ // see is delayed flag stuff is still valid
+ if (delayed_flag_op != NULL && delayed_flag_op != po) {
+ if (is_any_opr_modified(delayed_flag_op, po, 0))
+ delayed_flag_op = NULL;
+ }
+
+ if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) {
+ if (is_opr_modified(last_arith_dst, po))
+ last_arith_dst = NULL;
+ }
+
+ label_pending = 0;
+ }
+
+ if (g_stack_fsz && !g_stack_frame_used)
+ fprintf(fout, " (void)sf;\n");
+
+ fprintf(fout, "}\n\n");
+
+ gen_x_cleanup(opcnt);
+}
+
+static void gen_x_cleanup(int opcnt)
+{
+ int i;
+
+ for (i = 0; i < opcnt; i++) {
+ struct label_ref *lr, *lr_del;
+
+ lr = g_label_refs[i].next;
+ while (lr != NULL) {
+ lr_del = lr;
+ lr = lr->next;
+ free(lr_del);
+ }
+ g_label_refs[i].i = -1;
+ g_label_refs[i].next = NULL;
+
+ if (ops[i].op == OP_CALL) {
+ if (ops[i].pp)
+ proto_release(ops[i].pp);
+ }
+ }
+ g_func_pp = NULL;
+}
+
+struct func_proto_dep;
+
+struct func_prototype {
+ char name[NAMELEN];
+ int id;
+ int argc_stack;
+ int regmask_dep;
+ int has_ret:3; // -1, 0, 1: unresolved, no, yes
+ unsigned int dep_resolved:1;
+ unsigned int is_stdcall:1;
+ struct func_proto_dep *dep_func;
+ int dep_func_cnt;
+ const struct parsed_proto *pp; // seed pp, if any
+};
+
+struct func_proto_dep {
+ char *name;
+ struct func_prototype *proto;
+ int regmask_live; // .. at the time of call
+ unsigned int ret_dep:1; // return from this is caller's return
+};
+
+static struct func_prototype *hg_fp;
+static int hg_fp_cnt;
+
+static struct scanned_var {
+ char name[NAMELEN];
+ enum opr_lenmod lmod;
+ unsigned int is_seeded:1;
+ unsigned int is_c_str:1;
+ const struct parsed_proto *pp; // seed pp, if any
+} *hg_vars;
+static int hg_var_cnt;
+
+static char **hg_refs;
+static int hg_ref_cnt;
+
+static void output_hdr_fp(FILE *fout, const struct func_prototype *fp,
+ int count);
+
+static struct func_prototype *hg_fp_add(const char *funcn)
+{
+ struct func_prototype *fp;
+
+ if ((hg_fp_cnt & 0xff) == 0) {
+ hg_fp = realloc(hg_fp, sizeof(hg_fp[0]) * (hg_fp_cnt + 0x100));
+ my_assert_not(hg_fp, NULL);
+ memset(hg_fp + hg_fp_cnt, 0, sizeof(hg_fp[0]) * 0x100);
+ }
+
+ fp = &hg_fp[hg_fp_cnt];
+ snprintf(fp->name, sizeof(fp->name), "%s", funcn);
+ fp->id = hg_fp_cnt;
+ fp->argc_stack = -1;
+ hg_fp_cnt++;
+
+ return fp;
+}
+
+static struct func_proto_dep *hg_fp_find_dep(struct func_prototype *fp,
+ const char *name)
+{
+ int i;
+
+ for (i = 0; i < fp->dep_func_cnt; i++)
+ if (IS(fp->dep_func[i].name, name))
+ return &fp->dep_func[i];
+
+ return NULL;
+}
+
+static void hg_fp_add_dep(struct func_prototype *fp, const char *name)
+{
+ // is it a dupe?
+ if (hg_fp_find_dep(fp, name))
+ return;
+
+ if ((fp->dep_func_cnt & 0xff) == 0) {
+ fp->dep_func = realloc(fp->dep_func,
+ sizeof(fp->dep_func[0]) * (fp->dep_func_cnt + 0x100));
+ my_assert_not(fp->dep_func, NULL);
+ memset(&fp->dep_func[fp->dep_func_cnt], 0,
+ sizeof(fp->dep_func[0]) * 0x100);
+ }
+ fp->dep_func[fp->dep_func_cnt].name = strdup(name);
+ fp->dep_func_cnt++;
+}
+
+static int hg_fp_cmp_name(const void *p1_, const void *p2_)
+{
+ const struct func_prototype *p1 = p1_, *p2 = p2_;
+ return strcmp(p1->name, p2->name);
+}
+
+#if 0
+static int hg_fp_cmp_id(const void *p1_, const void *p2_)
+{
+ const struct func_prototype *p1 = p1_, *p2 = p2_;
+ return p1->id - p2->id;
+}
+#endif
+
+static void hg_ref_add(const char *name)
+{
+ if ((hg_ref_cnt & 0xff) == 0) {
+ hg_refs = realloc(hg_refs, sizeof(hg_refs[0]) * (hg_ref_cnt + 0x100));
+ my_assert_not(hg_refs, NULL);
+ memset(hg_refs + hg_ref_cnt, 0, sizeof(hg_refs[0]) * 0x100);
+ }
+
+ hg_refs[hg_ref_cnt] = strdup(name);
+ my_assert_not(hg_refs[hg_ref_cnt], NULL);
+ hg_ref_cnt++;
+}
+
+// recursive register dep pass
+// - track saved regs (part 2)
+// - try to figure out arg-regs
+// - calculate reg deps
+static void gen_hdr_dep_pass(int i, int opcnt, unsigned char *cbits,
+ struct func_prototype *fp, int regmask_save, int regmask_dst,
+ int *regmask_dep, int *has_ret)
+{
+ struct func_proto_dep *dep;
+ struct parsed_op *po;
+ int from_caller = 0;
+ int j, l;
+ int reg;
+ int ret;
+
+ for (; i < opcnt; i++)
+ {
+ if (cbits[i >> 3] & (1 << (i & 7)))
+ return;
+ cbits[i >> 3] |= (1 << (i & 7));
+
+ po = &ops[i];
+
+ if ((po->flags & OPF_JMP) && po->op != OP_CALL) {
+ if (po->flags & OPF_RMD)
+ continue;
+
+ if (po->btj != NULL) {
+ // jumptable
+ for (j = 0; j < po->btj->count; j++) {
+ check_i(po, po->btj->d[j].bt_i);
+ gen_hdr_dep_pass(po->btj->d[j].bt_i, opcnt, cbits, fp,
+ regmask_save, regmask_dst, regmask_dep, has_ret);
+ }
+ return;
+ }
+
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP) {
+ gen_hdr_dep_pass(po->bt_i, opcnt, cbits, fp,
+ regmask_save, regmask_dst, regmask_dep, has_ret);
+ }
+ else {
+ i = po->bt_i - 1;
+ }
+ continue;
+ }
+
+ if (po->flags & OPF_FARG)
+ /* (just calculate register deps) */;
+ else if (po->op == OP_PUSH && po->operand[0].type == OPT_REG)
+ {
+ reg = po->operand[0].reg;
+ ferr_assert(po, reg >= 0);
+
+ if (po->flags & OPF_RSAVE) {
+ regmask_save |= 1 << reg;
+ continue;
+ }
+ if (po->flags & OPF_DONE)
+ continue;
+
+ ret = scan_for_pop(i + 1, opcnt, i + opcnt * 2, reg, 0, 0);
+ if (ret == 1) {
+ regmask_save |= 1 << reg;
+ po->flags |= OPF_RMD;
+ scan_for_pop(i + 1, opcnt, i + opcnt * 3, reg, 0, OPF_RMD);
+ continue;
+ }
+ }
+ else if (po->flags & OPF_RMD)
+ continue;
+ else if (po->op == OP_CALL) {
+ po->regmask_dst |= 1 << xAX;
+
+ dep = hg_fp_find_dep(fp, po->operand[0].name);
+ if (dep != NULL)
+ dep->regmask_live = regmask_save | regmask_dst;
+ }
+ else if (po->op == OP_RET) {
+ if (po->operand_cnt > 0) {
+ fp->is_stdcall = 1;
+ if (fp->argc_stack >= 0
+ && fp->argc_stack != po->operand[0].val / 4)
+ ferr(po, "ret mismatch? (%d)\n", fp->argc_stack * 4);
+ fp->argc_stack = po->operand[0].val / 4;
+ }
+ }
+
+ // if has_ret is 0, there is uninitialized eax path,
+ // which means it's most likely void func
+ if (*has_ret != 0 && (po->flags & OPF_TAIL)) {
+ if (po->op == OP_CALL) {
+ j = i;
+ ret = 1;
+ }
+ else {
+ struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_DWORD, xAX);
+ j = -1;
+ from_caller = 0;
+ ret = resolve_origin(i, &opr, i + opcnt * 4, &j, &from_caller);
+ }
+
+ if (ret != 1 && from_caller) {
+ // unresolved eax - probably void func
+ *has_ret = 0;
+ }
+ else {
+ if (j >= 0 && ops[j].op == OP_CALL) {
+ dep = hg_fp_find_dep(fp, ops[j].operand[0].name);
+ if (dep != NULL)
+ dep->ret_dep = 1;
+ else
+ *has_ret = 1;
}
else
- ferr(po, "TODO 64bit divident\n");
- last_arith_dst = NULL;
- delayed_flag_op = NULL;
- break;
+ *has_ret = 1;
+ }
+ }
- case OP_TEST:
- case OP_CMP:
- propagate_lmod(po, &po->operand[0], &po->operand[1]);
- if (pfomask != 0) {
- for (j = 0; j < 8; j++) {
- if (pfomask & (1 << j)) {
- out_cmp_test(buf1, sizeof(buf1), po, j, 0);
- fprintf(fout, " cond_%s = %s;",
- parsed_flag_op_names[j], buf1);
- }
+ l = regmask_save | regmask_dst;
+ if (g_bp_frame && !(po->flags & OPF_EBP_S))
+ l |= 1 << xBP;
+
+ l = po->regmask_src & ~l;
+#if 0
+ if (l)
+ fnote(po, "dep |= %04x, dst %04x, save %04x (f %x)\n",
+ l, regmask_dst, regmask_save, po->flags);
+#endif
+ *regmask_dep |= l;
+ regmask_dst |= po->regmask_dst;
+
+ if (po->flags & OPF_TAIL)
+ return;
+ }
+}
+
+static void gen_hdr(const char *funcn, int opcnt)
+{
+ int save_arg_vars[MAX_ARG_GRP] = { 0, };
+ unsigned char cbits[MAX_OPS / 8];
+ const struct parsed_proto *pp_c;
+ struct parsed_proto *pp;
+ struct func_prototype *fp;
+ struct parsed_op *po;
+ int regmask_dummy = 0;
+ int regmask_dep;
+ int max_bp_offset = 0;
+ int has_ret;
+ int i, j, l;
+ int ret;
+
+ pp_c = proto_parse(g_fhdr, funcn, 1);
+ if (pp_c != NULL)
+ // already in seed, will add to hg_fp later
+ return;
+
+ fp = hg_fp_add(funcn);
+
+ g_bp_frame = g_sp_frame = g_stack_fsz = 0;
+ g_stack_frame_used = 0;
+
+ // pass1:
+ // - resolve all branches
+ // - parse calls with labels
+ resolve_branches_parse_calls(opcnt);
+
+ // pass2:
+ // - handle ebp/esp frame, remove ops related to it
+ scan_prologue_epilogue(opcnt);
+
+ // pass3:
+ // - remove dead labels
+ // - collect calls
+ for (i = 0; i < opcnt; i++)
+ {
+ if (g_labels[i] != NULL && g_label_refs[i].i == -1) {
+ free(g_labels[i]);
+ g_labels[i] = NULL;
+ }
+
+ po = &ops[i];
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ continue;
+
+ if (po->op == OP_CALL) {
+ if (po->operand[0].type == OPT_LABEL)
+ hg_fp_add_dep(fp, opr_name(po, 0));
+ else if (po->pp != NULL)
+ hg_fp_add_dep(fp, po->pp->name);
+ }
+ }
+
+ // pass4:
+ // - remove dead labels
+ // - handle push <const>/pop pairs
+ for (i = 0; i < opcnt; i++)
+ {
+ if (g_labels[i] != NULL && g_label_refs[i].i == -1) {
+ free(g_labels[i]);
+ g_labels[i] = NULL;
+ }
+
+ po = &ops[i];
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ continue;
+
+ if (po->op == OP_PUSH && po->operand[0].type == OPT_CONST)
+ scan_for_pop_const(i, opcnt, i + opcnt * 13);
+ }
+
+ // pass5:
+ // - process trivial calls
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ continue;
+
+ if (po->op == OP_CALL)
+ {
+ pp = process_call_early(i, opcnt, &j);
+ if (pp != NULL) {
+ if (!(po->flags & OPF_ATAIL))
+ // since we know the args, try to collect them
+ if (collect_call_args_early(po, i, pp, ®mask_dummy) != 0)
+ pp = NULL;
+ }
+
+ if (pp != NULL) {
+ if (j >= 0) {
+ // commit esp adjust
+ if (ops[j].op != OP_POP)
+ patch_esp_adjust(&ops[j], pp->argc_stack * 4);
+ else {
+ for (l = 0; l < pp->argc_stack; l++)
+ ops[j + l].flags |= OPF_DONE | OPF_RMD | OPF_NOREGS;
}
- pfomask = 0;
}
+
+ po->flags |= OPF_DONE;
+ }
+ }
+ }
+
+ // pass6:
+ // - track saved regs (simple)
+ // - process calls
+ for (i = 0; i < opcnt; i++)
+ {
+ po = &ops[i];
+ if (po->flags & (OPF_RMD|OPF_DONE))
+ continue;
+
+ if (po->op == OP_PUSH && po->operand[0].type == OPT_REG
+ && po->operand[0].reg != xCX)
+ {
+ ret = scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, 0);
+ if (ret == 1) {
+ // regmask_save |= 1 << po->operand[0].reg; // do it later
+ po->flags |= OPF_RSAVE | OPF_RMD | OPF_DONE;
+ scan_for_pop_ret(i + 1, opcnt, po->operand[0].reg, OPF_RMD);
+ }
+ }
+ else if (po->op == OP_CALL)
+ {
+ pp = process_call(i, opcnt);
+
+ if (!pp->is_unresolved && !(po->flags & OPF_ATAIL)) {
+ // since we know the args, collect them
+ ret = collect_call_args(po, i, pp, ®mask_dummy, save_arg_vars,
+ i + opcnt * 1);
+ }
+ }
+ }
+
+ // pass7
+ memset(cbits, 0, sizeof(cbits));
+ regmask_dep = 0;
+ has_ret = -1;
+
+ gen_hdr_dep_pass(0, opcnt, cbits, fp, 0, 0, ®mask_dep, &has_ret);
+
+ // find unreachable code - must be fixed in IDA
+ for (i = 0; i < opcnt; i++)
+ {
+ if (cbits[i >> 3] & (1 << (i & 7)))
+ continue;
+
+ if (g_labels[i] == NULL && i > 0 && ops[i - 1].op == OP_CALL
+ && ops[i - 1].pp != NULL && ops[i - 1].pp->is_osinc)
+ {
+ // the compiler sometimes still generates code after
+ // noreturn OS functions
+ break;
+ }
+ if (ops[i].op != OP_NOP)
+ ferr(&ops[i], "unreachable code\n");
+ }
+
+ for (i = 0; i < g_eqcnt; i++) {
+ if (g_eqs[i].offset > max_bp_offset && g_eqs[i].offset < 4*32)
+ max_bp_offset = g_eqs[i].offset;
+ }
+
+ if (fp->argc_stack < 0) {
+ max_bp_offset = (max_bp_offset + 3) & ~3;
+ fp->argc_stack = max_bp_offset / 4;
+ if ((g_ida_func_attr & IDAFA_BP_FRAME) && fp->argc_stack > 0)
+ fp->argc_stack--;
+ }
+
+ fp->regmask_dep = regmask_dep & ~(1 << xSP);
+ fp->has_ret = has_ret;
+#if 0
+ printf("// has_ret %d, regmask_dep %x\n",
+ fp->has_ret, fp->regmask_dep);
+ output_hdr_fp(stdout, fp, 1);
+ if (IS(funcn, "sub_10007F72")) exit(1);
+#endif
+
+ gen_x_cleanup(opcnt);
+}
+
+static void hg_fp_resolve_deps(struct func_prototype *fp)
+{
+ struct func_prototype fp_s;
+ int dep;
+ int i;
+
+ // this thing is recursive, so mark first..
+ fp->dep_resolved = 1;
+
+ for (i = 0; i < fp->dep_func_cnt; i++) {
+ strcpy(fp_s.name, fp->dep_func[i].name);
+ fp->dep_func[i].proto = bsearch(&fp_s, hg_fp, hg_fp_cnt,
+ sizeof(hg_fp[0]), hg_fp_cmp_name);
+ if (fp->dep_func[i].proto != NULL) {
+ if (!fp->dep_func[i].proto->dep_resolved)
+ hg_fp_resolve_deps(fp->dep_func[i].proto);
+
+ dep = ~fp->dep_func[i].regmask_live
+ & fp->dep_func[i].proto->regmask_dep;
+ fp->regmask_dep |= dep;
+ // printf("dep %s %s |= %x\n", fp->name,
+ // fp->dep_func[i].name, dep);
+
+ if (fp->has_ret == -1 && fp->dep_func[i].ret_dep)
+ fp->has_ret = fp->dep_func[i].proto->has_ret;
+ }
+ }
+}
+
+// make all thiscall/edx arg functions referenced from .data fastcall
+static void do_func_refs_from_data(void)
+{
+ struct func_prototype *fp, fp_s;
+ int i;
+
+ for (i = 0; i < hg_ref_cnt; i++) {
+ strcpy(fp_s.name, hg_refs[i]);
+ fp = bsearch(&fp_s, hg_fp, hg_fp_cnt,
+ sizeof(hg_fp[0]), hg_fp_cmp_name);
+ if (fp == NULL)
+ continue;
+
+ if (fp->argc_stack != 0 && (fp->regmask_dep & (mxCX | mxDX)))
+ fp->regmask_dep |= mxCX | mxDX;
+ }
+}
+
+static void output_hdr_fp(FILE *fout, const struct func_prototype *fp,
+ int count)
+{
+ const struct parsed_proto *pp;
+ char *p, namebuf[NAMELEN];
+ const char *name;
+ int regmask_dep;
+ int argc_normal;
+ int j, arg;
+
+ for (; count > 0; count--, fp++) {
+ if (fp->has_ret == -1)
+ fprintf(fout, "// ret unresolved\n");
+#if 0
+ fprintf(fout, "// dep:");
+ for (j = 0; j < fp->dep_func_cnt; j++) {
+ fprintf(fout, " %s/", fp->dep_func[j].name);
+ if (fp->dep_func[j].proto != NULL)
+ fprintf(fout, "%04x/%d", fp->dep_func[j].proto->regmask_dep,
+ fp->dep_func[j].proto->has_ret);
+ }
+ fprintf(fout, "\n");
+#endif
+
+ p = strchr(fp->name, '@');
+ if (p != NULL) {
+ memcpy(namebuf, fp->name, p - fp->name);
+ namebuf[p - fp->name] = 0;
+ name = namebuf;
+ }
+ else
+ name = fp->name;
+ if (name[0] == '_')
+ name++;
+
+ pp = proto_parse(g_fhdr, name, 1);
+ if (pp != NULL && pp->is_include)
+ continue;
+
+ if (fp->pp != NULL) {
+ // part of seed, output later
+ continue;
+ }
+
+ regmask_dep = fp->regmask_dep;
+ argc_normal = fp->argc_stack;
+
+ fprintf(fout, "%-5s", fp->pp ? fp->pp->ret_type.name :
+ (fp->has_ret ? "int" : "void"));
+ if (regmask_dep && (fp->is_stdcall || fp->argc_stack > 0)
+ && (regmask_dep & ~mxCX) == 0)
+ {
+ fprintf(fout, "/*__thiscall*/ ");
+ argc_normal++;
+ regmask_dep = 0;
+ }
+ else if (regmask_dep && (fp->is_stdcall || fp->argc_stack == 0)
+ && (regmask_dep & ~(mxCX | mxDX)) == 0)
+ {
+ fprintf(fout, " __fastcall ");
+ if (!(regmask_dep & (1 << xDX)) && fp->argc_stack == 0)
+ argc_normal = 1;
+ else
+ argc_normal += 2;
+ regmask_dep = 0;
+ }
+ else if (regmask_dep && !fp->is_stdcall) {
+ fprintf(fout, "/*__usercall*/ ");
+ }
+ else if (regmask_dep) {
+ fprintf(fout, "/*__userpurge*/ ");
+ }
+ else if (fp->is_stdcall)
+ fprintf(fout, " __stdcall ");
+ else
+ fprintf(fout, " __cdecl ");
+
+ fprintf(fout, "%s(", name);
+
+ arg = 0;
+ for (j = 0; j < xSP; j++) {
+ if (regmask_dep & (1 << j)) {
+ arg++;
+ if (arg != 1)
+ fprintf(fout, ", ");
+ if (fp->pp != NULL)
+ fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name);
else
- no_output = 1;
- last_arith_dst = NULL;
- delayed_flag_op = po;
- break;
+ fprintf(fout, "int");
+ fprintf(fout, " a%d/*<%s>*/", arg, regs_r32[j]);
+ }
+ }
- // note: we reuse OP_Jcc for SETcc, only flags differ
- case OP_JO ... OP_JG:
- if (po->flags & OPF_JMP)
- fprintf(fout, " goto %s;", po->operand[0].name);
- // else SETcc - should already be handled
- break;
+ for (j = 0; j < argc_normal; j++) {
+ arg++;
+ if (arg != 1)
+ fprintf(fout, ", ");
+ if (fp->pp != NULL) {
+ fprintf(fout, "%s", fp->pp->arg[arg - 1].type.name);
+ if (!fp->pp->arg[arg - 1].type.is_ptr)
+ fprintf(fout, " ");
+ }
+ else
+ fprintf(fout, "int ");
+ fprintf(fout, "a%d", arg);
+ }
- case OP_JMP:
- assert_operand_cnt(1);
- last_arith_dst = NULL;
- delayed_flag_op = NULL;
+ fprintf(fout, ");\n");
+ }
+}
- if (po->operand[0].type == OPT_REGMEM) {
- ret = sscanf(po->operand[0].name, "%[^[][%[^*]*4]",
- buf1, buf2);
- if (ret != 2)
- ferr(po, "parse failure for jmp '%s'\n",
- po->operand[0].name);
- fprintf(fout, " goto *jt_%s[%s];", buf1, buf2);
- break;
- }
- else if (po->operand[0].type != OPT_LABEL)
- ferr(po, "unhandled jmp type\n");
+static void output_hdr(FILE *fout)
+{
+ static const char *lmod_c_names[] = {
+ [OPLM_UNSPEC] = "???",
+ [OPLM_BYTE] = "uint8_t",
+ [OPLM_WORD] = "uint16_t",
+ [OPLM_DWORD] = "uint32_t",
+ [OPLM_QWORD] = "uint64_t",
+ };
+ const struct scanned_var *var;
+ struct func_prototype *fp;
+ char line[256] = { 0, };
+ char name[256];
+ int i;
- fprintf(fout, " goto %s;", po->operand[0].name);
+ // add stuff from headers
+ for (i = 0; i < pp_cache_size; i++) {
+ if (pp_cache[i].is_cinc && !pp_cache[i].is_stdcall)
+ snprintf(name, sizeof(name), "_%s", pp_cache[i].name);
+ else
+ snprintf(name, sizeof(name), "%s", pp_cache[i].name);
+ fp = hg_fp_add(name);
+ fp->pp = &pp_cache[i];
+ fp->argc_stack = fp->pp->argc_stack;
+ fp->is_stdcall = fp->pp->is_stdcall;
+ fp->regmask_dep = get_pp_arg_regmask_src(fp->pp);
+ fp->has_ret = !IS(fp->pp->ret_type.name, "void");
+ }
+
+ // resolve deps
+ qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_name);
+ for (i = 0; i < hg_fp_cnt; i++)
+ hg_fp_resolve_deps(&hg_fp[i]);
+
+ // adjust functions referenced from data segment
+ do_func_refs_from_data();
+
+ // note: messes up .proto ptr, don't use
+ //qsort(hg_fp, hg_fp_cnt, sizeof(hg_fp[0]), hg_fp_cmp_id);
+
+ // output variables
+ for (i = 0; i < hg_var_cnt; i++) {
+ var = &hg_vars[i];
+
+ if (var->pp != NULL)
+ // part of seed
+ continue;
+ else if (var->is_c_str)
+ fprintf(fout, "extern %-8s %s[];", "char", var->name);
+ else
+ fprintf(fout, "extern %-8s %s;",
+ lmod_c_names[var->lmod], var->name);
+
+ if (var->is_seeded)
+ fprintf(fout, " // seeded");
+ fprintf(fout, "\n");
+ }
+
+ fprintf(fout, "\n");
+
+ // output function prototypes
+ output_hdr_fp(fout, hg_fp, hg_fp_cnt);
+
+ // seed passthrough
+ fprintf(fout, "\n// - seed -\n");
+
+ rewind(g_fhdr);
+ while (fgets(line, sizeof(line), g_fhdr))
+ fwrite(line, 1, strlen(line), fout);
+}
+
+// '=' needs special treatment
+// also ' quote
+static char *next_word_s(char *w, size_t wsize, char *s)
+{
+ size_t i;
+
+ s = sskip(s);
+
+ i = 0;
+ if (*s == '\'' && s[1] != '\r' && s[1] != '\n') {
+ w[0] = s[0];
+ for (i = 1; i < wsize - 1; i++) {
+ if (s[i] == 0) {
+ printf("warning: missing closing quote: \"%s\"\n", s);
+ break;
+ }
+ if (s[i] == '\'')
break;
+ w[i] = s[i];
+ }
+ }
- case OP_CALL:
- assert_operand_cnt(1);
- pp = po->datap;
- my_assert_not(pp, NULL);
+ for (; i < wsize - 1; i++) {
+ if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0))
+ break;
+ w[i] = s[i];
+ }
+ w[i] = 0;
- if (pp->is_fptr)
- fprintf(fout, " %s = %s;\n", pp->name,
- out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
- "(void *)", 0));
+ if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=')
+ printf("warning: '%s' truncated\n", w);
- fprintf(fout, " ");
- if (strstr(pp->ret_type.name, "int64")) {
- if (po->flags & OPF_TAIL)
- ferr(po, "int64 and tail?\n");
- fprintf(fout, "mul_tmp = ");
- }
- else if (!IS(pp->ret_type.name, "void")) {
- if (po->flags & OPF_TAIL) {
- if (!IS(g_func_pp->ret_type.name, "void")) {
- fprintf(fout, "return ");
- if (g_func_pp->ret_type.is_ptr != pp->ret_type.is_ptr)
- fprintf(fout, "(%s)", g_func_pp->ret_type.name);
- }
- }
- else if (regmask & (1 << xAX)) {
- fprintf(fout, "eax = ");
- if (pp->ret_type.is_ptr)
- fprintf(fout, "(u32)");
- }
- }
+ return s + i;
+}
+
+static int cmpstringp(const void *p1, const void *p2)
+{
+ return strcmp(*(char * const *)p1, *(char * const *)p2);
+}
- if (pp->name[0] == 0)
- ferr(po, "missing pp->name\n");
- fprintf(fout, "%s%s(", pp->name,
- pp->has_structarg ? "_sa" : "");
+static int is_xref_needed(char *p, char **rlist, int rlist_len)
+{
+ char *p2;
- for (arg = 0; arg < pp->argc; arg++) {
- if (arg > 0)
- fprintf(fout, ", ");
+ p = sskip(p);
+ if (strstr(p, "..."))
+ // unable to determine, assume needed
+ return 1;
- cast[0] = 0;
- if (pp->arg[arg].type.is_ptr)
- snprintf(cast, sizeof(cast), "(%s)", pp->arg[arg].type.name);
+ if (*p == '.') // .text, .data, ...
+ // ref from other data or non-function -> no
+ return 0;
- if (pp->arg[arg].reg != NULL) {
- fprintf(fout, "%s%s", cast, pp->arg[arg].reg);
- continue;
- }
+ p2 = strpbrk(p, "+:\r\n\x18");
+ if (p2 != NULL)
+ *p2 = 0;
+ if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp))
+ // referenced from removed code
+ return 0;
- // stack arg
- tmp_op = pp->arg[arg].datap;
- if (tmp_op == NULL)
- ferr(po, "parsed_op missing for arg%d\n", arg);
- if (tmp_op->argnum != 0) {
- fprintf(fout, "%ss_a%d", cast, tmp_op->argnum);
- }
- else {
- fprintf(fout, "%s",
- out_src_opr(buf1, sizeof(buf1),
- tmp_op, &tmp_op->operand[0], cast, 0));
- }
- }
- fprintf(fout, ");");
+ return 1;
+}
- if (strstr(pp->ret_type.name, "int64")) {
- fprintf(fout, "\n");
- fprintf(fout, " edx = mul_tmp >> 32;\n");
- fprintf(fout, " eax = mul_tmp;");
- }
+static int ida_xrefs_show_need(FILE *fasm, char *p,
+ char **rlist, int rlist_len)
+{
+ int found_need = 0;
+ char line[256];
+ long pos;
- if (pp->is_unresolved) {
- snprintf(buf3, sizeof(buf3), " unresoved %dreg",
- pp->argc_reg);
- strcat(g_comment, buf3);
- }
+ p = strrchr(p, ';');
+ if (p != NULL && *p == ';' && IS_START(p + 2, "DATA XREF: ")) {
+ p += 13;
+ if (is_xref_needed(p, rlist, rlist_len))
+ return 1;
+ }
- if (po->flags & OPF_TAIL) {
- ret = 0;
- if (i == opcnt - 1 || pp->is_noreturn)
- ret = 0;
- else if (IS(pp->ret_type.name, "void"))
- ret = 1;
- else if (IS(g_func_pp->ret_type.name, "void"))
- ret = 1;
- // else already handled as 'return f()'
+ pos = ftell(fasm);
+ while (1)
+ {
+ if (!my_fgets(line, sizeof(line), fasm))
+ break;
+ // non-first line is always indented
+ if (!my_isblank(line[0]))
+ break;
- if (ret) {
- if (!IS(g_func_pp->ret_type.name, "void")) {
- ferr(po, "int func -> void func tailcall?\n");
- }
- else {
- fprintf(fout, "\n return;");
- strcat(g_comment, " ^ tailcall");
- }
- }
- else
- strcat(g_comment, " tailcall");
- }
- if (pp->is_noreturn)
- strcat(g_comment, " noreturn");
- delayed_flag_op = NULL;
- last_arith_dst = NULL;
- break;
+ // should be no content, just comment
+ p = sskip(line);
+ if (*p != ';')
+ break;
- case OP_RET:
- if (g_func_pp->is_vararg)
- fprintf(fout, " va_end(ap);\n");
-
- if (IS(g_func_pp->ret_type.name, "void")) {
- if (i != opcnt - 1 || label_pending)
- fprintf(fout, " return;");
- }
- else if (g_func_pp->ret_type.is_ptr) {
- fprintf(fout, " return (%s)eax;",
- g_func_pp->ret_type.name);
- }
- else
- fprintf(fout, " return eax;");
+ p = strrchr(p, ';');
+ p += 2;
+ // it's printed once, but no harm to check again
+ if (IS_START(p, "DATA XREF: "))
+ p += 11;
- last_arith_dst = NULL;
- delayed_flag_op = NULL;
- break;
+ if (is_xref_needed(p, rlist, rlist_len)) {
+ found_need = 1;
+ break;
+ }
+ }
+ fseek(fasm, pos, SEEK_SET);
+ return found_need;
+}
- case OP_PUSH:
- if (po->argnum != 0) {
- // special case - saved func arg
- out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
- fprintf(fout, " s_a%d = %s;", po->argnum, buf1);
- break;
- }
- else if (po->flags & OPF_RSAVE) {
- out_src_opr_u32(buf1, sizeof(buf1), po, &po->operand[0]);
- fprintf(fout, " s_%s = %s;", buf1, buf1);
- break;
- }
- else if (ops[i + 1].op == OP_POP
- && !(ops[i + 1].flags & OPF_RMD))
- {
- // push/pop pair
- out_dst_opr(buf1, sizeof(buf1),
- &ops[i + 1], &ops[i + 1].operand[0]);
- fprintf(fout, " %s = %s;", buf1,
- out_src_opr(buf2, sizeof(buf2), po, &po->operand[0],
- ops[i + 1].operand[0].is_ptr ? "(void *)" : "", 0));
+static void scan_variables(FILE *fasm, char **rlist, int rlist_len)
+{
+ struct scanned_var *var;
+ char line[256] = { 0, };
+ char words[4][256];
+ int no_identifier;
+ char *p = NULL;
+ int wordc;
+ int l;
- ops[i + 1].flags |= OPF_RMD;
- break;
- }
- if (!(g_ida_func_attr & IDAFA_NORETURN))
- ferr(po, "stray push encountered\n");
- no_output = 1;
- break;
+ while (!feof(fasm))
+ {
+ // skip to next data section
+ while (my_fgets(line, sizeof(line), fasm))
+ {
+ asmln++;
- case OP_POP:
- if (po->flags & OPF_RSAVE) {
- out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
- fprintf(fout, " %s = s_%s;", buf1, buf1);
- break;
- }
- ferr(po, "stray pop encountered\n");
- break;
+ p = sskip(line);
+ if (*p == 0 || *p == ';')
+ continue;
- case OP_NOP:
- no_output = 1;
- break;
+ p = sskip(next_word_s(words[0], sizeof(words[0]), p));
+ if (*p == 0 || *p == ';')
+ continue;
- default:
- no_output = 1;
- ferr(po, "unhandled op type %d, flags %x\n",
- po->op, po->flags);
- break;
- }
+ if (*p != 's' || !IS_START(p, "segment para public"))
+ continue;
- if (g_comment[0] != 0) {
- char *p = g_comment;
- while (my_isblank(*p))
- p++;
- fprintf(fout, " // %s", p);
- g_comment[0] = 0;
- no_output = 0;
+ break;
}
- if (!no_output)
- fprintf(fout, "\n");
- // some sanity checking
- if (po->flags & OPF_REP) {
- if (po->op != OP_STOS && po->op != OP_MOVS
- && po->op != OP_CMPS && po->op != OP_SCAS)
- ferr(po, "unexpected rep\n");
- if (!(po->flags & (OPF_REPZ|OPF_REPNZ))
- && (po->op == OP_CMPS || po->op == OP_SCAS))
- ferr(po, "cmps/scas with plain rep\n");
- }
- if ((po->flags & (OPF_REPZ|OPF_REPNZ))
- && po->op != OP_CMPS && po->op != OP_SCAS)
- ferr(po, "unexpected repz/repnz\n");
+ if (p == NULL || !IS_START(p, "segment para public"))
+ break;
+ p = sskip(p + 19);
- if (pfomask != 0)
- ferr(po, "missed flag calc, pfomask=%x\n", pfomask);
+ if (!IS_START(p, "'DATA'"))
+ continue;
- // see is delayed flag stuff is still valid
- if (delayed_flag_op != NULL && delayed_flag_op != po) {
- if (is_any_opr_modified(delayed_flag_op, po, 0))
- delayed_flag_op = NULL;
- }
+ // now process it
+ while (my_fgets(line, sizeof(line), fasm))
+ {
+ asmln++;
- if (last_arith_dst != NULL && last_arith_dst != &po->operand[0]) {
- if (is_opr_modified(last_arith_dst, po))
- last_arith_dst = NULL;
- }
+ p = line;
+ no_identifier = my_isblank(*p);
- label_pending = 0;
- }
+ p = sskip(p);
+ if (*p == 0 || *p == ';')
+ continue;
- if (g_stack_fsz && !g_stack_frame_used)
- fprintf(fout, " (void)sf;\n");
+ for (wordc = 0; wordc < ARRAY_SIZE(words); wordc++) {
+ words[wordc][0] = 0;
+ p = sskip(next_word_s(words[wordc], sizeof(words[0]), p));
+ if (*p == 0 || *p == ';') {
+ wordc++;
+ break;
+ }
+ }
- fprintf(fout, "}\n\n");
+ if (wordc == 2 && IS(words[1], "ends"))
+ break;
+ if (wordc < 2)
+ continue;
- // cleanup
- for (i = 0; i < opcnt; i++) {
- struct label_ref *lr, *lr_del;
+ if (no_identifier) {
+ if (wordc >= 3 && IS(words[0], "dd") && IS(words[1], "offset"))
+ hg_ref_add(words[2]);
+ continue;
+ }
- lr = g_label_refs[i].next;
- while (lr != NULL) {
- lr_del = lr;
- lr = lr->next;
- free(lr_del);
- }
- g_label_refs[i].i = -1;
- g_label_refs[i].next = NULL;
+ if (IS_START(words[0], "__IMPORT_DESCRIPTOR_")) {
+ // when this starts, we don't need anything from this section
+ break;
+ }
- if (ops[i].op == OP_CALL) {
- pp = ops[i].datap;
- if (pp)
- proto_release(pp);
+ // check refs comment(s)
+ if (!ida_xrefs_show_need(fasm, p, rlist, rlist_len))
+ continue;
+
+ if ((hg_var_cnt & 0xff) == 0) {
+ hg_vars = realloc(hg_vars, sizeof(hg_vars[0])
+ * (hg_var_cnt + 0x100));
+ my_assert_not(hg_vars, NULL);
+ memset(hg_vars + hg_var_cnt, 0, sizeof(hg_vars[0]) * 0x100);
+ }
+
+ var = &hg_vars[hg_var_cnt++];
+ snprintf(var->name, sizeof(var->name), "%s", words[0]);
+
+ // maybe already in seed header?
+ var->pp = proto_parse(g_fhdr, var->name, 1);
+ if (var->pp != NULL) {
+ if (var->pp->is_fptr) {
+ var->lmod = OPLM_DWORD;
+ //var->is_ptr = 1;
+ }
+ else if (var->pp->is_func)
+ aerr("func?\n");
+ else if (!guess_lmod_from_c_type(&var->lmod, &var->pp->type))
+ aerr("unhandled C type '%s' for '%s'\n",
+ var->pp->type.name, var->name);
+
+ var->is_seeded = 1;
+ continue;
+ }
+
+ if (IS(words[1], "dd")) {
+ var->lmod = OPLM_DWORD;
+ if (wordc >= 4 && IS(words[2], "offset"))
+ hg_ref_add(words[3]);
+ }
+ else if (IS(words[1], "dw"))
+ var->lmod = OPLM_WORD;
+ else if (IS(words[1], "db")) {
+ var->lmod = OPLM_BYTE;
+ if (wordc >= 3 && (l = strlen(words[2])) > 4) {
+ if (words[2][0] == '\'' && IS(words[2] + l - 2, ",0"))
+ var->is_c_str = 1;
+ }
+ }
+ else if (IS(words[1], "dq"))
+ var->lmod = OPLM_QWORD;
+ //else if (IS(words[1], "dt"))
+ else
+ aerr("type '%s' not known\n", words[1]);
}
}
- g_func_pp = NULL;
+
+ rewind(fasm);
+ asmln = 0;
}
static void set_label(int i, const char *name)
if (p != NULL)
len = p - name;
- if (len > sizeof(g_labels[0]) - 1)
- aerr("label '%s' too long: %d\n", name, len);
- if (g_labels[i][0] != 0 && !IS_START(g_labels[i], "algn_"))
+ if (g_labels[i] != NULL && !IS_START(g_labels[i], "algn_"))
aerr("dupe label '%s' vs '%s'?\n", name, g_labels[i]);
+ g_labels[i] = realloc(g_labels[i], len + 1);
+ my_assert_not(g_labels[i], NULL);
memcpy(g_labels[i], name, len);
g_labels[i][len] = 0;
}
-// '=' needs special treatment..
-static char *next_word_s(char *w, size_t wsize, char *s)
-{
- size_t i;
-
- s = sskip(s);
-
- for (i = 0; i < wsize - 1; i++) {
- if (s[i] == 0 || my_isblank(s[i]) || (s[i] == '=' && i > 0))
- break;
- w[i] = s[i];
- }
- w[i] = 0;
-
- if (s[i] != 0 && !my_isblank(s[i]) && s[i] != '=')
- printf("warning: '%s' truncated\n", w);
-
- return s + i;
-}
-
struct chunk_item {
char *name;
long fptr;
return strcmp(c1->name, c2->name);
}
-static int cmpstringp(const void *p1, const void *p2)
-{
- return strcmp(*(char * const *)p1, *(char * const *)p2);
-}
-
static void scan_ahead(FILE *fasm)
{
char words[2][256];
oldpos = ftell(fasm);
oldasmln = asmln;
- while (fgets(line, sizeof(line), fasm))
+ while (my_fgets(line, sizeof(line), fasm))
{
wordc = 0;
asmln++;
add_func_chunk(fasm, words[0], asmln);
}
+ else if (IS_START(p, "; sctend"))
+ break;
+
continue;
} // *p == ';'
int skip_warned = 0;
int eq_alloc;
int verbose = 0;
+ int multi_seg = 0;
+ int end = 0;
int arg_out;
int arg;
int pi = 0;
verbose = 1;
else if (IS(argv[arg], "-rf"))
g_allow_regfunc = 1;
+ else if (IS(argv[arg], "-m"))
+ multi_seg = 1;
+ else if (IS(argv[arg], "-hdr"))
+ g_header_mode = g_quiet_pp = g_allow_regfunc = 1;
else
break;
}
if (argc < arg + 3) {
- printf("usage:\n%s [-v] [-rf] <.c> <.asm> <hdrf> [rlist]*\n",
- argv[0]);
+ printf("usage:\n%s [-v] [-rf] [-m] <.c> <.asm> <hdr.h> [rlist]*\n"
+ "%s -hdr <out.h> <.asm> <seed.h> [rlist]*\n"
+ "options:\n"
+ " -hdr - header generation mode\n"
+ " -rf - allow unannotated indirect calls\n"
+ " -m - allow multiple .text sections\n"
+ "[rlist] is a file with function names to skip,"
+ " one per line\n",
+ argv[0], argv[0]);
return 1;
}
frlist = fopen(argv[arg], "r");
my_assert_not(frlist, NULL);
- while (fgets(line, sizeof(line), frlist)) {
+ while (my_fgets(line, sizeof(line), frlist)) {
p = sskip(line);
if (*p == 0 || *p == ';')
continue;
g_label_refs[i].next = NULL;
}
- while (fgets(line, sizeof(line), fasm))
+ if (g_header_mode)
+ scan_variables(fasm, rlist, rlist_len);
+
+ while (my_fgets(line, sizeof(line), fasm))
{
wordc = 0;
asmln++;
}
}
}
+ else if (p[2] == 's' && IS_START(p, "; sctattr:"))
+ {
+ static const char *attrs[] = {
+ "clear_sf",
+ "clear_regmask",
+ };
+
+ // parse manual attribute-list comment
+ g_sct_func_attr = 0;
+ p = sskip(p + 10);
+
+ for (; *p != 0; p = sskip(p)) {
+ for (i = 0; i < ARRAY_SIZE(attrs); i++) {
+ if (!strncmp(p, attrs[i], strlen(attrs[i]))) {
+ g_sct_func_attr |= 1 << i;
+ p += strlen(attrs[i]);
+ break;
+ }
+ }
+ if (*p == '=') {
+ j = ret = 0;
+ if (i == 0)
+ // clear_sf=start,len (in dwords)
+ ret = sscanf(p, "=%d,%d%n", &g_stack_clear_start,
+ &g_stack_clear_len, &j);
+ else if (i == 1)
+ // clear_regmask=<mask>
+ ret = sscanf(p, "=%x%n", &g_regmask_init, &j) + 1;
+ if (ret < 2) {
+ anote("unparsed attr value: %s\n", p);
+ break;
+ }
+ p += j;
+ }
+ else if (i == ARRAY_SIZE(attrs)) {
+ anote("unparsed sct attr: %s\n", p);
+ break;
+ }
+ }
+ }
else if (p[2] == 'S' && IS_START(p, "; START OF FUNCTION CHUNK FOR "))
{
p += 30;
unsigned long addr = strtoul(p, NULL, 16);
unsigned long f_addr = strtoul(g_func + 4, NULL, 16);
if (addr > f_addr && !scanned_ahead) {
- anote("scan_ahead caused by '%s', addr %lx\n",
- g_func, addr);
+ //anote("scan_ahead caused by '%s', addr %lx\n",
+ // g_func, addr);
scan_ahead(fasm);
scanned_ahead = 1;
func_chunks_sorted = 0;
if (IS_START(p, "; sctproto:")) {
sctproto = strdup(p + 11);
}
+ else if (IS_START(p, "; sctend")) {
+ end = 1;
+ if (!pending_endp)
+ break;
+ }
}
if (wordc == 0) {
do_pending_endp:
// do delayed endp processing to collect switch jumptables
if (pending_endp) {
- if (in_func && !skip_func && wordc >= 2
+ if (in_func && !g_skip_func && !end && wordc >= 2
&& ((words[0][0] == 'd' && words[0][2] == 0)
|| (words[1][0] == 'd' && words[1][2] == 0)))
{
continue;
}
- if (in_func && !skip_func)
- gen_func(fout, g_fhdr, g_func, pi);
+ if (in_func && !g_skip_func) {
+ if (g_header_mode)
+ gen_hdr(g_func, pi);
+ else
+ gen_func(fout, g_fhdr, g_func, pi);
+ }
pending_endp = 0;
in_func = 0;
g_ida_func_attr = 0;
+ g_sct_func_attr = 0;
+ g_stack_clear_start = 0;
+ g_stack_clear_len = 0;
+ g_regmask_init = 0;
skip_warned = 0;
- skip_func = 0;
+ g_skip_func = 0;
g_func[0] = 0;
func_chunks_used = 0;
func_chunk_i = -1;
if (pi != 0) {
memset(&ops, 0, pi * sizeof(ops[0]));
- memset(g_labels, 0, pi * sizeof(g_labels[0]));
+ clear_labels(pi);
pi = 0;
}
g_eqcnt = 0;
pd->d = NULL;
}
g_func_pd_cnt = 0;
+ g_func_lmods = 0;
pd = NULL;
+
+ if (end)
+ break;
if (wordc == 0)
continue;
}
words[0], g_func);
p = words[0];
if (bsearch(&p, rlist, rlist_len, sizeof(rlist[0]), cmpstringp))
- skip_func = 1;
+ g_skip_func = 1;
strcpy(g_func, words[0]);
set_label(0, words[0]);
in_func = 1;
&& ops[0].op == OP_JMP && ops[0].operand[0].had_ds)
{
// import jump
- skip_func = 1;
+ g_skip_func = 1;
}
- if (!skip_func && func_chunks_used) {
+ if (!g_skip_func && func_chunks_used) {
// start processing chunks
struct chunk_item *ci, key = { g_func, 0 };
continue;
}
- if (wordc == 2 && IS(words[1], "ends"))
- break;
+ if (wordc == 2 && IS(words[1], "ends")) {
+ if (!multi_seg) {
+ end = 1;
+ if (pending_endp)
+ goto do_pending_endp;
+ break;
+ }
+
+ // scan for next text segment
+ while (my_fgets(line, sizeof(line), fasm)) {
+ asmln++;
+ p = sskip(line);
+ if (*p == 0 || *p == ';')
+ continue;
+
+ if (strstr(p, "segment para public 'CODE' use32"))
+ break;
+ }
+
+ continue;
+ }
p = strchr(words[0], ':');
if (p != NULL) {
continue;
}
- if (!in_func || skip_func) {
- if (!skip_warned && !skip_func && g_labels[pi][0] != 0) {
+ if (!in_func || g_skip_func) {
+ if (!skip_warned && !g_skip_func && g_labels[pi] != NULL) {
if (verbose)
anote("skipping from '%s'\n", g_labels[pi]);
skip_warned = 1;
}
- g_labels[pi][0] = 0;
+ free(g_labels[pi]);
+ g_labels[pi] = NULL;
continue;
}
g_eqs[g_eqcnt].lmod = OPLM_WORD;
else if (IS(words[2], "byte"))
g_eqs[g_eqcnt].lmod = OPLM_BYTE;
+ else if (IS(words[2], "qword"))
+ g_eqs[g_eqcnt].lmod = OPLM_QWORD;
else
aerr("bad lmod: '%s'\n", words[2]);
parse_op(&ops[pi], words, wordc);
- if (sctproto != NULL) {
- if (ops[pi].op == OP_CALL)
- ops[pi].datap = sctproto;
- sctproto = NULL;
- }
+ ops[pi].datap = sctproto;
+ sctproto = NULL;
pi++;
}
+ if (g_header_mode)
+ output_hdr(fout);
+
fclose(fout);
fclose(fasm);
fclose(g_fhdr);
notaz.gp2x.de / ia32rtools.git / blobdiff