OP_NOP,
OP_PUSH,
OP_POP,
+ OP_PUSHA,
+ OP_POPA,
OP_LEAVE,
OP_MOV,
OP_LEA,
OP_NOT,
OP_XLAT,
OP_CDQ,
+ OP_BSWAP,
OP_LODS,
OP_STOS,
OP_MOVS,
OP_FILD,
OP_FLDc,
OP_FST,
+ OP_FIST,
OP_FADD,
OP_FDIV,
OP_FMUL,
OP_FISUB,
OP_FIDIVR,
OP_FISUBR,
+ OP_FCOM,
+ OP_FNSTSW,
+ OP_FCHS,
+ OP_FCOS,
+ OP_FPATAN,
+ OP_FPTAN,
+ OP_FSIN,
+ OP_FSQRT,
+ OP_FXCH,
+ OP_FYL2X,
// mmx
OP_EMMS,
// pseudo-ops for lib calls
+ OPP_ALLSHL,
+ OPP_ALLSHR,
OPP_FTOL,
// undefined
OP_UD2,
// (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
+// OP_FCOM - needed_status_word_bits | (is_z_check << 16)
struct parsed_equ {
char name[64];
IDAFA_FPD = (1 << 5),
};
+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,
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;
};
#define mxAX (1 << xAX)
+#define mxCX (1 << xCX)
#define mxDX (1 << xDX)
#define mxST0 (1 << xST0)
#define mxST1 (1 << xST1)
+#define mxST1_0 (mxST1 | mxST0)
+#define mxST7_2 (0xfc << xST0)
+#define mxSTa (0xff << xST0)
// possible basic comparison types (without inversion)
enum parsed_flag_op {
{ "nop", OP_NOP, 0, 0, 0 },
{ "push", OP_PUSH, 1, 1, 0 },
{ "pop", OP_POP, 1, 1, OPF_DATA },
+ { "pusha",OP_PUSHA, 0, 0, 0 },
+ { "popa", OP_POPA, 0, 0, OPF_DATA },
{ "leave",OP_LEAVE, 0, 0, OPF_DATA },
{ "mov" , OP_MOV, 2, 2, OPF_DATA },
{ "lea", OP_LEA, 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 },
+ { "bswap",OP_BSWAP, 1, 1, OPF_DATA },
{ "lodsb",OP_LODS, 0, 0, OPF_DATA },
{ "lodsw",OP_LODS, 0, 0, OPF_DATA },
{ "lodsd",OP_LODS, 0, 0, OPF_DATA },
{ "fld", OP_FLD, 1, 1, OPF_FPUSH },
{ "fild", OP_FILD, 1, 1, OPF_FPUSH },
{ "fld1", OP_FLDc, 0, 0, OPF_FPUSH },
+ { "fldln2", 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 },
+ { "fstp", OP_FST, 1, 1, OPF_FPOP },
+ { "fist", OP_FIST, 1, 1, 0 },
+ { "fistp", OP_FIST, 1, 1, OPF_FPOP },
{ "fadd", OP_FADD, 0, 2, 0 },
{ "faddp", OP_FADD, 0, 2, OPF_FPOP },
{ "fdiv", OP_FDIV, 0, 2, 0 },
{ "fisub", OP_FISUB, 1, 1, 0 },
{ "fidivr", OP_FIDIVR, 1, 1, 0 },
{ "fisubr", OP_FISUBR, 1, 1, 0 },
+ { "fcom", OP_FCOM, 0, 1, 0 },
+ { "fcomp", OP_FCOM, 0, 1, OPF_FPOP },
+ { "fnstsw", OP_FNSTSW, 1, 1, OPF_DATA },
+ { "fchs", OP_FCHS, 0, 0, 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 },
+ { "fxch", OP_FXCH, 1, 1, 0 },
+ { "fyl2x", OP_FYL2X, 0, 0, OPF_FPOP },
// mmx
{ "emms", OP_EMMS, 0, 0, OPF_DATA },
{ "movq", OP_MOV, 2, 2, OPF_DATA },
// pseudo-ops for lib calls
+ { "_allshl",OPP_ALLSHL },
+ { "_allshr",OPP_ALLSHR },
{ "_ftol", OPP_FTOL },
// must be last
{ "ud2", OP_UD2 },
case OP_INC:
case OP_DEC:
case OP_NEG:
+ case OP_BSWAP:
// more below..
op->regmask_src |= op->regmask_dst;
break;
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, "ln2"))
+ op->operand[0].val = X87_CONST_LN2;
else if (IS(words[op_w] + 3, "z"))
op->operand[0].val = X87_CONST_Z;
else
break;
case OP_FST:
+ case OP_FIST:
op->regmask_src |= mxST0;
break;
case OP_FISUB:
case OP_FIDIVR:
case OP_FISUBR:
+ case OP_FCHS:
+ case OP_FCOS:
+ case OP_FSIN:
+ case OP_FSQRT:
+ case OP_FXCH:
op->regmask_src |= mxST0;
op->regmask_dst |= mxST0;
break;
+ case OP_FPATAN:
+ case OP_FYL2X:
+ op->regmask_src |= mxST0 | mxST1;
+ op->regmask_dst |= mxST0;
+ break;
+
+ case OP_FPTAN:
+ aerr("TODO\n");
+ break;
+
+ case OP_FCOM:
+ op->regmask_src |= mxST0;
+ break;
+
default:
break;
}
}
static char *out_src_opr_float(char *buf, size_t buf_size,
- struct parsed_op *po, struct parsed_opr *popr)
+ struct parsed_op *po, struct parsed_opr *popr, int need_float_stack)
{
const char *cast = NULL;
char tmp[256];
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);
+ if (need_float_stack) {
+ if (popr->reg == xST0)
+ snprintf(buf, buf_size, "f_st[f_stp & 7]");
+ else
+ snprintf(buf, buf_size, "f_st[(f_stp + %d) & 7]",
+ popr->reg - xST0);
+ }
+ else
+ snprintf(buf, buf_size, "f_st%d", popr->reg - xST0);
break;
case OPT_REGMEM:
}
static char *out_dst_opr_float(char *buf, size_t buf_size,
- struct parsed_op *po, struct parsed_opr *popr)
+ struct parsed_op *po, struct parsed_opr *popr, int need_float_stack)
{
// same?
- return out_src_opr_float(buf, buf_size, po, popr);
+ return out_src_opr_float(buf, buf_size, po, popr, need_float_stack);
}
static void out_test_for_cc(char *buf, size_t buf_size,
}
static void out_cmp_for_cc(char *buf, size_t buf_size,
- struct parsed_op *po, enum parsed_flag_op pfo, int is_inv)
+ struct parsed_op *po, enum parsed_flag_op pfo, int is_inv,
+ int is_neg)
{
const char *cast, *scast, *cast_use;
char buf1[256], buf2[256];
out_src_opr(buf1, sizeof(buf1), po, &po->operand[0], 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);
+ else {
+ char cast_op2[64];
+ snprintf(cast_op2, sizeof(cast_op2) - 1, "%s", cast_use);
+ if (is_neg)
+ strcat(cast_op2, "-");
+ out_src_opr(buf2, sizeof(buf2), po, &po->operand[1], cast_op2, 0);
+ }
switch (pfo) {
case PFO_C:
po->operand[0].lmod, buf3);
}
else if (po->op == OP_CMP) {
- out_cmp_for_cc(buf, buf_size, po, pfo, is_inv);
+ out_cmp_for_cc(buf, buf_size, po, pfo, is_inv, 0);
}
else
ferr(po, "%s: unhandled op: %d\n", __func__, po->op);
static int get_pp_arg_regmask_dst(const struct parsed_proto *pp)
{
+ 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 (strstr(pp->ret_type.name, "int64"))
- return (1 << xAX) | (1 << xDX);
+ return regmask | (1 << xAX) | (1 << xDX);
if (IS(pp->ret_type.name, "float")
|| IS(pp->ret_type.name, "double"))
{
- return mxST0;
+ return regmask | mxST0;
}
if (strcasecmp(pp->ret_type.name, "void") == 0)
- return 0;
+ return regmask;
- return mxAX;
+ return regmask | mxAX;
}
static void resolve_branches_parse_calls(int opcnt)
unsigned int regmask_src;
unsigned int regmask_dst;
} pseudo_ops[] = {
- { "__ftol", OPP_FTOL, OPF_FPOP, mxST0, mxAX | mxDX },
+ { "__allshl", OPP_ALLSHL, OPF_DATA, mxAX|mxDX|mxCX, mxAX|mxDX },
+ { "__allshr", OPP_ALLSHR, OPF_DATA, mxAX|mxDX|mxCX, mxAX|mxDX },
+ { "__ftol", OPP_FTOL, OPF_FPOP, mxST0, mxAX | mxDX },
};
const struct parsed_proto *pp_c;
struct parsed_proto *pp;
tmpname = opr_name(po, 0);
if (IS_START(tmpname, "loc_"))
ferr(po, "call to loc_*\n");
+ if (IS(tmpname, "__alloca_probe"))
+ continue;
// convert some calls to pseudo-ops
for (l = 0; l < ARRAY_SIZE(pseudo_ops); l++) {
static void scan_prologue_epilogue(int opcnt)
{
- int ecx_push = 0, esp_sub = 0;
+ int ecx_push = 0, esp_sub = 0, pusha = 0;
+ int sandard_epilogue;
int found;
int i, j, l;
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 | OPF_DONE | OPF_NOREGS;
+ if (ops[i].op == OP_PUSHA) {
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ pusha = 1;
+ i++;
+ }
+
+ if (ops[i].op == OP_SUB && IS(opr_name(&ops[i], 0), "esp")) {
+ g_stack_fsz = opr_const(&ops[i], 1);
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
i++;
}
else {
// another way msvc builds stack frame..
- i = 2;
while (ops[i].op == OP_PUSH && IS(opr_name(&ops[i], 0), "ecx")) {
g_stack_fsz += 4;
ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
j--;
}
- if ((ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp"))
- || ops[j].op == OP_LEAVE)
+ sandard_epilogue = 0;
+ if (ops[j].op == OP_POP && IS(opr_name(&ops[j], 0), "ebp"))
+ {
+ ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ // the standard epilogue is sometimes even used without a sf
+ if (ops[j - 1].op == OP_MOV
+ && IS(opr_name(&ops[j - 1], 0), "esp")
+ && IS(opr_name(&ops[j - 1], 1), "ebp"))
+ sandard_epilogue = 1;
+ }
+ else if (ops[j].op == OP_LEAVE)
{
ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ sandard_epilogue = 1;
}
else if (ops[i].op == OP_CALL && ops[i].pp != NULL
&& ops[i].pp->is_noreturn)
else if (!(g_ida_func_attr & IDAFA_NORETURN))
ferr(&ops[j], "'pop ebp' expected\n");
- if (g_stack_fsz != 0) {
+ if (g_stack_fsz != 0 || sandard_epilogue) {
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"))
+ else if (sandard_epilogue) // mov esp, ebp
{
ops[j - 1].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
j -= 2;
}
}
+ if (pusha) {
+ if (ops[j].op == OP_POPA)
+ ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ else
+ ferr(&ops[j], "popa expected\n");
+ }
+
found = 1;
i++;
} while (i < opcnt);
{
g_stack_fsz = ops[i].operand[1].val;
ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ i++;
+ esp_sub = 1;
+ break;
+ }
+ else if (ops[i].op == OP_MOV && ops[i].operand[0].reg == xAX
+ && ops[i].operand[1].type == OPT_CONST
+ && ops[i + 1].op == OP_CALL
+ && IS(opr_name(&ops[i + 1], 0), "__alloca_probe"))
+ {
+ g_stack_fsz += ops[i].operand[1].val;
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ i++;
+ ops[i].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
+ i++;
esp_sub = 1;
break;
}
{
g_sp_frame = 1;
- 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)
|| !IS(opr_name(&ops[j], 0), "esp")
|| ops[j].operand[1].type != OPT_CONST
|| ops[j].operand[1].val != g_stack_fsz)
+ {
+ if (ops[i].op == OP_CALL && ops[i].pp != NULL
+ && ops[i].pp->is_noreturn)
+ {
+ // noreturn tailcall with no epilogue
+ i++;
+ continue;
+ }
ferr(&ops[j], "'add esp' expected\n");
+ }
ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
ops[j].operand[1].val = 0; // hack for stack arg scanner
}
}
+// adjust datap of all reachable 'op' insns when moving back
+// returns 1 if at least 1 op was found
+// returns -1 if path without an op was found
+static int adjust_prev_op(int i, enum op_op op, int magic, void *datap)
+{
+ struct label_ref *lr;
+ int ret = 0;
+
+ if (ops[i].cc_scratch == magic)
+ return 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 |= adjust_prev_op(lr->i, op, magic, datap);
+ }
+ if (i > 0 && LAST_OP(i - 1))
+ return ret;
+ }
+
+ i--;
+ if (i < 0)
+ return -1;
+
+ if (ops[i].cc_scratch == magic)
+ return 0;
+ ops[i].cc_scratch = magic;
+
+ if (ops[i].op != op)
+ continue;
+
+ ops[i].datap = datap;
+ return 1;
+ }
+}
+
// 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
}
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)))
+ int full_opr = 1;
+ if (opr->type == OPT_REG && po->operand[0].type == OPT_REG
+ && opr->reg == po->operand[0].reg && (po->flags & OPF_DATA))
{
+ full_opr = po->operand[0].lmod >= opr->lmod;
+ }
+ if (is_opr_modified(opr, po) && full_opr) {
// it's overwritten
return ret;
}
return 0;
}
+// find next instruction that reads opr
+// *op_i must be set to -1 by the caller
+// on return, *op_i is set to first flag user insn
+// returns 1 if exactly 1 flag user is found
+static int find_next_flag_use(int i, int opcnt, int magic, int *op_i)
+{
+ struct parsed_op *po;
+ int j, ret = 0;
+
+ for (; i < opcnt; i++)
+ {
+ 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_JMP) {
+ 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_flag_use(po->btj->d[j].bt_i, opcnt,
+ magic, op_i);
+ }
+ return ret;
+ }
+
+ if (po->flags & OPF_RMD)
+ continue;
+ check_i(po, po->bt_i);
+ if (po->flags & OPF_CJMP)
+ goto found;
+ else
+ i = po->bt_i - 1;
+ continue;
+ }
+
+ if (!(po->flags & OPF_CC)) {
+ if (po->flags & OPF_FLAGS)
+ // flags changed
+ return ret;
+ if (po->flags & OPF_TAIL)
+ return ret;
+ continue;
+ }
+
+found:
+ if (*op_i >= 0)
+ return -1;
+
+ *op_i = i;
+ return 1;
+ }
+
+ return 0;
+}
+
static int try_resolve_const(int i, const struct parsed_opr *opr,
int magic, unsigned int *val)
{
return -1;
}
+static int resolve_used_bits(int i, int opcnt, int reg,
+ int *mask, int *is_z_check)
+{
+ struct parsed_opr opr = OPR_INIT(OPT_REG, OPLM_WORD, reg);
+ int j = -1, k = -1;
+ int ret;
+
+ ret = find_next_read(i, opcnt, &opr, i + opcnt * 20, &j);
+ if (ret != 1)
+ return -1;
+
+ find_next_read(j + 1, opcnt, &opr, i + opcnt * 20 + 1, &k);
+ if (k != -1) {
+ fnote(&ops[j], "(first read)\n");
+ ferr(&ops[k], "TODO: bit resolve: multiple readers\n");
+ }
+
+ if (ops[j].op != OP_TEST || ops[j].operand[1].type != OPT_CONST)
+ ferr(&ops[j], "TODO: bit resolve: not a const test\n");
+
+ ferr_assert(&ops[j], ops[j].operand[0].type == OPT_REG);
+ ferr_assert(&ops[j], ops[j].operand[0].reg == reg);
+
+ *mask = ops[j].operand[1].val;
+ if (ops[j].operand[0].lmod == OPLM_BYTE
+ && ops[j].operand[0].name[1] == 'h')
+ {
+ *mask <<= 8;
+ }
+ ferr_assert(&ops[j], (*mask & ~0xffff) == 0);
+
+ *is_z_check = 0;
+ ret = find_next_flag_use(j + 1, opcnt, i + opcnt * 20 + 2, &k);
+ if (ret == 1)
+ *is_z_check = ops[k].pfo == PFO_Z;
+
+ return 0;
+}
+
static const struct parsed_proto *resolve_icall(int i, int opcnt,
int *pp_i, int *multi_src)
{
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 (!g_header_mode) {
+ ret = scan_for_mod(&ops[j], j + 1, i, 1);
+ if (ret >= 0)
+ return -1;
+ }
if (pp->arg[arg].type.is_va_list)
return -1;
int *regmask_init, int regmask_arg)
{
struct parsed_op *po;
- unsigned int mask;
int already_saved;
int regmask_new;
int regmask_op;
po->regmask_dst &= ~(1 << xAX);
}
}
+
+ // not "full stack" mode and have something in stack
+ if (!(regmask_now & mxST7_2) && (regmask_now & mxST1_0))
+ ferr(po, "float stack is not empty on func call\n");
}
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
if (g_bp_frame && !(po->flags & OPF_EBP_S))
regmask_new &= ~(1 << xBP);
- if (po->op == OP_CALL) {
- // allow fastcall calls from anywhere, calee may be also sitting
- // in some fastcall table even when it's not using reg args
- if (regmask_new & po->regmask_src & (1 << xCX)) {
- *regmask_init |= (1 << xCX);
- regmask_now |= (1 << xCX);
- regmask_new &= ~(1 << xCX);
- }
- if (regmask_new & po->regmask_src & (1 << xDX)) {
- *regmask_init |= (1 << xDX);
- regmask_now |= (1 << xDX);
- regmask_new &= ~(1 << xDX);
- }
- }
-
if (regmask_new != 0)
fnote(po, "uninitialized reg mask: %x\n", regmask_new);
}
}
+ if (po->flags & OPF_FPUSH) {
+ if (regmask_now & mxST1)
+ regmask_now |= mxSTa; // switch to "full stack" mode
+ if (regmask_now & mxSTa)
+ po->flags |= OPF_FSHIFT;
+ if (!(regmask_now & mxST7_2)) {
+ regmask_now =
+ (regmask_now & ~mxST1_0) | ((regmask_now & mxST0) << 1);
+ }
+ }
+
regmask_now |= regmask_op;
*regmask |= regmask_now;
// released regs
if (po->flags & OPF_FPOP) {
- mask = mxST0 | mxST1;
- if (!(regmask_now & mask))
+ if ((regmask_now & mxSTa) == 0)
ferr(po, "float pop on empty stack?\n");
- if (regmask_now & mxST1)
+ if (regmask_now & (mxST7_2 | mxST1))
po->flags |= OPF_FSHIFT;
- regmask_now = (regmask_now & ~mask) | ((regmask_now & mxST1) >> 1);
+ if (!(regmask_now & mxST7_2)) {
+ regmask_now =
+ (regmask_now & ~mxST1_0) | ((regmask_now & mxST1) >> 1);
+ }
}
if (po->flags & OPF_TAIL) {
- if (regmask_now & (mxST0 | mxST1))
- ferr(po, "float regs on tail: %x\n", regmask_now);
- return;
+ if (!(regmask_now & mxST7_2)) {
+ if (get_pp_arg_regmask_dst(g_func_pp) & mxST0) {
+ if (!(regmask_now & mxST0))
+ ferr(po, "no st0 on float return, mask: %x\n",
+ regmask_now);
+ }
+ else if (regmask_now & mxST1_0)
+ ferr(po, "float regs on tail: %x\n", regmask_now);
+ }
+
+ // there is support for "conditional tailcall", sort of
+ if (!(po->flags & OPF_CC))
+ return;
}
}
}
unsigned int uval;
int save_arg_vars[MAX_ARG_GRP] = { 0, };
unsigned char cbits[MAX_OPS / 8];
- int cond_vars = 0;
+ const char *float_type;
+ const char *float_st0;
+ const char *float_st1;
+ int need_float_stack = 0;
+ int need_float_sw = 0; // status word
int need_tmp_var = 0;
int need_tmp64 = 0;
+ int cond_vars = 0;
int had_decl = 0;
int label_pending = 0;
- int regmask_save = 0; // regs saved/restored in this func
+ int need_double = 0;
+ int regmask_save = 0; // used 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 = 0; // used regs
int pfomask = 0;
int found = 0;
+ int dead_dst;
int no_output;
int i, j, l;
int arg;
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)
regmask_arg = get_pp_arg_regmask_src(g_func_pp);
regmask_ret = get_pp_arg_regmask_dst(g_func_pp);
- if (g_func_pp->has_retreg) {
- for (arg = 0; arg < g_func_pp->argc; arg++) {
- if (g_func_pp->arg[arg].type.is_retreg) {
- reg = char_array_i(regs_r32,
- ARRAY_SIZE(regs_r32), g_func_pp->arg[arg].reg);
- ferr_assert(ops, reg >= 0);
- regmask_ret |= 1 << reg;
- }
- }
- }
-
// pass1:
// - resolve all branches
// - parse calls with labels
// - process calls, stage 2
// - handle some push/pop pairs
// - scan for STD/CLD, propagate DF
+ // - try to resolve needed x87 status word bits
for (i = 0; i < opcnt; i++)
{
+ int mask, z_check;
+
po = &ops[i];
if (po->flags & OPF_RMD)
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)
+ switch (po->op) {
+ case OP_PUSH:
+ if (!(po->flags & OPF_FARG) && !(po->flags & OPF_RSAVE)
+ && po->operand[0].type == OPT_CONST)
+ {
+ scan_for_pop_const(i, opcnt, i + opcnt * 12);
+ }
+ break;
+
+ case OP_POP:
scan_pushes_for_pop(i, opcnt, ®mask_pp);
- else if (po->op == OP_STD) {
+ break;
+
+ case OP_STD:
po->flags |= OPF_DF | OPF_RMD | OPF_DONE;
scan_propagate_df(i + 1, opcnt);
+ break;
+
+ case OP_FNSTSW:
+ need_float_sw = 1;
+ if (po->operand[0].type != OPT_REG || po->operand[0].reg != xAX)
+ ferr(po, "TODO: fnstsw to mem\n");
+ ret = resolve_used_bits(i + 1, opcnt, xAX, &mask, &z_check);
+ if (ret != 0)
+ ferr(po, "fnstsw resolve failed\n");
+ ret = adjust_prev_op(i, OP_FCOM, i + opcnt * 21,
+ (void *)(long)(mask | (z_check << 16)));
+ if (ret != 1)
+ ferr(po, "failed to find fcom: %d\n", ret);
+ break;
+
+ default:
+ break;
}
}
// - find POPs for PUSHes, rm both
// - scan for all used registers
memset(cbits, 0, sizeof(cbits));
- reg_use_pass(0, opcnt, cbits, 0, ®mask,
+ 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
+ // - other op specific processing
for (i = 0; i < opcnt; i++)
{
po = &ops[i];
cond_vars |= 1 << PFO_C;
}
- if (po->op == OP_CMPS || po->op == OP_SCAS) {
+ switch (po->op) {
+ case OP_CMPS:
+ case OP_SCAS:
cond_vars |= 1 << PFO_Z;
- }
- else if (po->op == OP_MUL
- || (po->op == OP_IMUL && po->operand_cnt == 1))
- {
+ break;
+
+ case OP_MUL:
if (po->operand[0].lmod == OPLM_DWORD)
need_tmp64 = 1;
- }
- else if (po->op == OP_CALL) {
+ break;
+
+ case OP_IMUL:
+ if (po->operand_cnt == 1 && po->operand[0].lmod == OPLM_DWORD)
+ need_tmp64 = 1;
+ break;
+
+ case OP_CALL:
// note: resolved non-reg calls are OPF_DONE already
pp = po->pp;
ferr_assert(po, pp != NULL);
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_"))
+ break;
+
+ case OP_MOV:
+ if (po->operand[0].pp != NULL && po->operand[1].pp != NULL)
{
- 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");
+ // <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) {
+ break;
+
+ case OP_DIV:
+ case OP_IDIV:
if (po->operand[0].lmod == OPLM_DWORD) {
// 32bit division is common, look for it
if (po->op == OP_DIV)
}
else
need_tmp_var = 1;
- }
- else if (po->op == OP_CLD)
+ break;
+
+ case OP_CLD:
po->flags |= OPF_RMD | OPF_DONE;
- else if (po->op == OPP_FTOL) {
+ break;
+
+ case OP_RCL:
+ case OP_RCR:
+ case OP_XCHG:
+ need_tmp_var = 1;
+ break;
+
+ case OP_FLD:
+ if (po->operand[0].lmod == OPLM_QWORD)
+ need_double = 1;
+ break;
+
+ case OPP_ALLSHL:
+ case OPP_ALLSHR:
+ need_tmp64 = 1;
+ break;
+
+ case 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;
+ break;
}
- if (po->op == OP_RCL || po->op == OP_RCR || po->op == OP_XCHG)
- need_tmp_var = 1;
+ default:
+ break;
+ }
}
+ float_type = need_double ? "double" : "float";
+ need_float_stack = !!(regmask & mxST7_2);
+ float_st0 = need_float_stack ? "f_st[f_stp & 7]" : "f_st0";
+ float_st1 = need_float_stack ? "f_st[(f_stp + 1) & 7]" : "f_st1";
+
// output starts here
// define userstack size
}
}
// ... x87
- if (regmask_now & 0xff0000) {
- for (reg = 16; reg < 24; reg++) {
- if (regmask_now & (1 << reg)) {
- fprintf(fout, " double f_st%d", reg - 16);
- if (regmask_init & (1 << reg))
- fprintf(fout, " = 0");
- fprintf(fout, ";\n");
- had_decl = 1;
+ if (need_float_stack) {
+ fprintf(fout, " %s f_st[8];\n", float_type);
+ fprintf(fout, " int f_stp = 0;\n");
+ had_decl = 1;
+ }
+ else {
+ 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 (need_float_sw) {
+ fprintf(fout, " u16 f_sw;\n");
+ had_decl = 1;
+ }
+
if (regmask_save) {
for (reg = 0; reg < 8; reg++) {
if (regmask_save & (1 << reg)) {
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");
strcpy(g_comment, "cdq");
break;
+ case OP_BSWAP:
+ assert_operand_cnt(1);
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]);
+ fprintf(fout, " %s = __builtin_bswap32(%s);", buf1, buf1);
+ break;
+
case OP_LODS:
if (po->flags & OPF_REP) {
assert_operand_cnt(3);
delayed_flag_op = NULL;
break;
}
+ if (pfomask & (1 << PFO_LE)) {
+ out_cmp_for_cc(buf1, sizeof(buf1), po, PFO_LE, 0, 1);
+ fprintf(fout, " cond_%s = %s;\n",
+ parsed_flag_op_names[PFO_LE], buf1);
+ pfomask &= ~(1 << PFO_LE);
+ }
goto dualop_arith;
case OP_SUB:
if (j == PFO_Z || j == PFO_S)
continue;
- out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0);
+ out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0, 0);
fprintf(fout, " cond_%s = %s;\n",
parsed_flag_op_names[j], buf1);
pfomask &= ~(1 << j);
if (j == PFO_Z || j == PFO_S || j == PFO_C)
continue;
- out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0);
+ out_cmp_for_cc(buf1, sizeof(buf1), po, j, 0, 0);
fprintf(fout, " cond_%s = %s;\n",
parsed_flag_op_names[j], buf1);
pfomask &= ~(1 << j);
fprintf(fout, "(u32)");
}
else if (po->regmask_dst & mxST0) {
- fprintf(fout, "f_st0 = ");
+ ferr_assert(po, po->flags & OPF_FPUSH);
+ if (need_float_stack)
+ fprintf(fout, "f_st[--f_stp & 7] = ");
+ else
+ fprintf(fout, "f_st0 = ");
}
}
g_func_pp->arg[arg].reg, g_func_pp->arg[arg].reg);
}
- if (!(regmask_ret & (1 << xAX))) {
+ if (regmask_ret & mxST0) {
+ fprintf(fout, " return %s;", float_st0);
+ }
+ else if (!(regmask_ret & mxAX)) {
if (i != opcnt - 1 || label_pending)
fprintf(fout, " return;");
}
no_output = 1;
break;
+ // pseudo ops
+ case OPP_ALLSHL:
+ case OPP_ALLSHR:
+ fprintf(fout, " tmp64 = ((u64)edx << 32) | eax;\n");
+ fprintf(fout, " tmp64 = (s64)tmp64 %s= LOBYTE(ecx);\n",
+ po->op == OPP_ALLSHL ? "<<" : ">>");
+ fprintf(fout, " edx = tmp64 >> 32; eax = tmp64;");
+ strcat(g_comment, po->op == OPP_ALLSHL
+ ? " allshl" : " allshr");
+ 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;
+ if (need_float_stack) {
+ out_src_opr_float(buf1, sizeof(buf1),
+ po, &po->operand[0], 1);
+ if (po->regmask_src & mxSTa) {
+ fprintf(fout, " f_st[(f_stp - 1) & 7] = %s; f_stp--;",
+ buf1);
+ }
+ else
+ fprintf(fout, " f_st[--f_stp & 7] = %s;", buf1);
+ }
+ else {
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_st1 = f_st0;");
+ 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], 0));
}
- 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 = (double)%s;",
- out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
- lmod_cast(po, po->operand[0].lmod, 1), 0));
+ out_src_opr(buf1, sizeof(buf1), po, &po->operand[0],
+ lmod_cast(po, po->operand[0].lmod, 1), 0);
+ snprintf(buf2, sizeof(buf2), "(%s)%s", float_type, buf1);
+ if (need_float_stack) {
+ fprintf(fout, " f_st[--f_stp & 7] = %s;", buf2);
+ }
+ else {
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_st1 = f_st0;");
+ fprintf(fout, " f_st0 = %s;", buf2);
+ }
strcat(g_comment, " fild");
break;
case OP_FLDc:
- if (po->flags & OPF_FSHIFT)
- fprintf(fout, " f_st1 = f_st0;\n");
- fprintf(fout, " f_st0 = ");
+ if (need_float_stack)
+ fprintf(fout, " f_st[--f_stp & 7] = ");
+ else {
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_st1 = f_st0;");
+ 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;
+ case X87_CONST_1: fprintf(fout, "1.0;"); break;
+ case X87_CONST_LN2: fprintf(fout, "0.693147180559945;"); 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)
- {
+ dead_dst = po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xST0;
+ if (!dead_dst) {
+ fprintf(fout, " %s = %s;",
+ out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0],
+ need_float_stack), float_st0);
+ }
+ if (po->flags & OPF_FSHIFT) {
+ if (need_float_stack)
+ fprintf(fout, " f_stp++;");
+ else
+ fprintf(fout, " f_st0 = f_st1;");
+ }
+ if (dead_dst && !(po->flags & OPF_FSHIFT))
no_output = 1;
- break;
+ else
+ strcat(g_comment, " fst");
+ break;
+
+ case OP_FIST:
+ fprintf(fout, " %s = %s%s;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]),
+ lmod_cast(po, po->operand[0].lmod, 1), float_st0);
+ if (po->flags & OPF_FSHIFT) {
+ if (need_float_stack)
+ fprintf(fout, " f_stp++;");
+ else
+ fprintf(fout, " f_st0 = f_st1;");
}
- 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");
+ strcat(g_comment, " fist");
break;
case OP_FADD:
case OP_FDIV:
case OP_FMUL:
case OP_FSUB:
+ out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0],
+ need_float_stack);
+ out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1],
+ need_float_stack);
+ dead_dst = (po->flags & OPF_FPOP)
+ && po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xST0;
switch (po->op) {
case OP_FADD: j = '+'; break;
case OP_FDIV: 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);
+ if (need_float_stack) {
+ if (!dead_dst)
+ fprintf(fout, " %s %c= %s;", buf1, j, buf2);
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_stp++;");
}
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]));
+ if (po->flags & OPF_FSHIFT) {
+ // note: assumes only 2 regs handled
+ if (!dead_dst)
+ fprintf(fout, " f_st0 = f_st1 %c f_st0;", j);
+ else
+ fprintf(fout, " f_st0 = f_st1;");
+ }
+ else if (!dead_dst)
+ fprintf(fout, " %s %c= %s;", buf1, j, buf2);
}
+ no_output = (dead_dst && !(po->flags & OPF_FSHIFT));
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]));
+ out_dst_opr_float(buf1, sizeof(buf1), po, &po->operand[0],
+ need_float_stack);
+ out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1],
+ need_float_stack);
+ out_src_opr_float(buf3, sizeof(buf3), po, &po->operand[0],
+ need_float_stack);
+ dead_dst = (po->flags & OPF_FPOP)
+ && po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xST0;
+ j = po->op == OP_FDIVR ? '/' : '-';
+ if (need_float_stack) {
+ if (!dead_dst)
+ fprintf(fout, " %s = %s %c %s;", buf1, buf2, j, buf3);
+ if (po->flags & OPF_FSHIFT)
+ fprintf(fout, " f_stp++;");
+ }
+ else {
+ if (po->flags & OPF_FSHIFT) {
+ if (!dead_dst)
+ fprintf(fout, " f_st0 = f_st0 %c f_st1;", j);
+ else
+ fprintf(fout, " f_st0 = f_st1;");
+ }
+ else if (!dead_dst)
+ fprintf(fout, " %s = %s %c %s;", buf1, buf2, j, buf3);
+ }
+ no_output = (dead_dst && !(po->flags & OPF_FSHIFT));
break;
case OP_FIADD:
case OP_FISUB: j = '-'; break;
default: j = 'x'; break;
}
- fprintf(fout, " f_st0 %c= (double)%s;", j,
+ fprintf(fout, " %s %c= (%s)%s;", float_st0,
+ 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 ? '/' : '-');
+ fprintf(fout, " %s = %s %c %s;", float_st0,
+ out_src_opr_float(buf2, sizeof(buf2), po, &po->operand[1],
+ need_float_stack),
+ po->op == OP_FIDIVR ? '/' : '-', float_st0);
+ break;
+
+ case OP_FCOM: {
+ int mask, z_check;
+ ferr_assert(po, po->datap != NULL);
+ mask = (long)po->datap & 0xffff;
+ z_check = ((long)po->datap >> 16) & 1;
+ out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0],
+ need_float_stack);
+ if (mask == 0x0100) { // C0 -> <
+ fprintf(fout, " f_sw = %s < %s ? 0x0100 : 0;",
+ float_st0, buf1);
+ }
+ else if (mask == 0x4000) { // C3 -> =
+ fprintf(fout, " f_sw = %s == %s ? 0x4000 : 0;",
+ float_st0, buf1);
+ }
+ else if (mask == 0x4100) { // C3, C0
+ if (z_check) {
+ fprintf(fout, " f_sw = %s <= %s ? 0x4100 : 0;",
+ float_st0, buf1);
+ strcat(g_comment, " z_chk_det");
+ }
+ else {
+ fprintf(fout, " f_sw = %s == %s ? 0x4000 : "
+ "(%s < %s ? 0x0100 : 0);",
+ float_st0, buf1, float_st0, buf1);
+ }
+ }
+ else
+ ferr(po, "unhandled sw mask: %x\n", mask);
+ if (po->flags & OPF_FSHIFT) {
+ if (need_float_stack)
+ fprintf(fout, " f_stp++;");
+ else
+ fprintf(fout, " f_st0 = f_st1;");
+ }
+ break;
+ }
+
+ case OP_FNSTSW:
+ fprintf(fout, " %s = f_sw;",
+ out_dst_opr(buf1, sizeof(buf1), po, &po->operand[0]));
+ break;
+
+ case OP_FCHS:
+ fprintf(fout, " %s = -%s;", float_st0, float_st0);
+ break;
+
+ case OP_FCOS:
+ fprintf(fout, " %s = cos%s(%s);", float_st0,
+ need_double ? "" : "f", float_st0);
+ break;
+
+ case OP_FPATAN:
+ if (need_float_stack) {
+ fprintf(fout, " %s = atan%s(%s / %s);", float_st1,
+ need_double ? "" : "f", float_st1, float_st0);
+ fprintf(fout, " f_stp++;");
+ }
+ else {
+ fprintf(fout, " f_st0 = atan%s(f_st1 / f_st0);",
+ need_double ? "" : "f");
+ }
+ break;
+
+ case OP_FYL2X:
+ if (need_float_stack) {
+ fprintf(fout, " %s = %s * log2%s(%s);", float_st1,
+ float_st1, need_double ? "" : "f", float_st0);
+ fprintf(fout, " f_stp++;");
+ }
+ else {
+ fprintf(fout, " f_st0 = f_st1 * log2%s(f_st0);",
+ need_double ? "" : "f");
+ }
+ break;
+
+ case OP_FSIN:
+ fprintf(fout, " %s = sin%s(%s);", float_st0,
+ need_double ? "" : "f", float_st0);
+ break;
+
+ case OP_FSQRT:
+ fprintf(fout, " %s = sqrt%s(%s);", float_st0,
+ need_double ? "" : "f", float_st0);
+ break;
+
+ case OP_FXCH:
+ dead_dst = po->operand[0].type == OPT_REG
+ && po->operand[0].reg == xST0;
+ if (!dead_dst) {
+ out_src_opr_float(buf1, sizeof(buf1), po, &po->operand[0],
+ need_float_stack);
+ fprintf(fout, " { %s t = %s; %s = %s; %s = t; }", float_type,
+ float_st0, float_st0, buf1, buf1);
+ strcat(g_comment, " fxch");
+ }
+ else
+ no_output = 1;
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;");
+ fprintf(fout, " eax = (s32)%s;", float_st0);
+ if (po->flags & OPF_FSHIFT) {
+ if (need_float_stack)
+ fprintf(fout, " f_stp++;");
+ else
+ fprintf(fout, " f_st0 = f_st1;");
+ }
strcat(g_comment, " ftol");
break;
} *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);
-struct func_prototype *hg_fp_add(const char *funcn)
+static struct func_prototype *hg_fp_add(const char *funcn)
{
struct func_prototype *fp;
}
#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
fp->argc_stack--;
}
- fp->regmask_dep = regmask_dep & ~(1 << xSP);
+ fp->regmask_dep = regmask_dep & ~((1 << xSP) | mxSTa);
fp->has_ret = has_ret;
#if 0
printf("// has_ret %d, regmask_dep %x\n",
}
}
+// 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)
{
char *p, namebuf[NAMELEN];
const char *name;
int regmask_dep;
- int argc_stack;
+ int argc_normal;
int j, arg;
for (; count > 0; count--, fp++) {
}
regmask_dep = fp->regmask_dep;
- argc_stack = fp->argc_stack;
+ 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 || argc_stack == 0)
- && (regmask_dep & ~((1 << xCX) | (1 << xDX))) == 0)
+ 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)) && argc_stack == 0)
- argc_stack = 1;
+ if (!(regmask_dep & (1 << xDX)) && fp->argc_stack == 0)
+ argc_normal = 1;
else
- argc_stack += 2;
+ argc_normal += 2;
regmask_dep = 0;
}
else if (regmask_dep && !fp->is_stdcall) {
}
}
- for (j = 0; j < argc_stack; j++) {
+ for (j = 0; j < argc_normal; j++) {
arg++;
if (arg != 1)
fprintf(fout, ", ");
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);
s = sskip(s);
i = 0;
- if (*s == '\'') {
+ if (*s == '\'' && s[1] != '\r' && s[1] != '\n') {
w[0] = s[0];
for (i = 1; i < wsize - 1; i++) {
if (s[i] == 0) {
return 1;
}
-static int xrefs_show_need(FILE *fasm, char *p,
+static int ida_xrefs_show_need(FILE *fasm, char *p,
char **rlist, int rlist_len)
{
int found_need = 0;
{
struct scanned_var *var;
char line[256] = { 0, };
- char words[3][256];
+ char words[4][256];
+ int no_identifier;
char *p = NULL;
int wordc;
int l;
asmln++;
p = line;
- if (my_isblank(*p))
- continue;
+ no_identifier = my_isblank(*p);
p = sskip(p);
if (*p == 0 || *p == ';')
if (wordc < 2)
continue;
+ if (no_identifier) {
+ if (wordc >= 3 && IS(words[0], "dd") && IS(words[1], "offset"))
+ hg_ref_add(words[2]);
+ continue;
+ }
+
if (IS_START(words[0], "__IMPORT_DESCRIPTOR_")) {
// when this starts, we don't need anything from this section
break;
}
// check refs comment(s)
- if (!xrefs_show_need(fasm, p, rlist, rlist_len))
+ if (!ida_xrefs_show_need(fasm, p, rlist, rlist_len))
continue;
if ((hg_var_cnt & 0xff) == 0) {
continue;
}
- if (IS(words[1], "dd"))
+ 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")) {
}
}
}
+ 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;
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;
g_skip_func = 0;
g_func[0] = 0;