X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=tools%2Ftranslate.c;h=fe6408786a3a59793caae9bc7a6d95ea4a4f668e;hb=71d50aa7a431645296bc8624618e02e7f3bf73ac;hp=f85d5befbba1b86931b8d1fcce121fd9c7803b3c;hpb=c8fb3694c071ffe819509e01292b2a1520a70017;p=ia32rtools.git

diff --git a/tools/translate.c b/tools/translate.c
index f85d5be..fe64087 100644
--- a/tools/translate.c
+++ b/tools/translate.c
@@ -4,12 +4,22 @@
  *
  * This work is licensed under the terms of 3-clause BSD license.
  * See COPYING file in the top-level directory.
+ *
+ * recognized asm hint comments:
+ * sctattr - function attributes (see code)
+ * sctend  - force end of function/chunk
+ * sctpatch: <p> - replace current asm line with <p>
+ * sctproto: <p> - prototype of ref'd function or struct
+ * sctref  - variable is referenced, make global
+ * sctskip_start - start of skipped code chunk (inclusive)
+ * sctskip_end   - end of skipped code chunk (inclusive)
  */
 
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 
 #include "my_assert.h"
 #include "my_str.h"
@@ -482,7 +492,7 @@ static int parse_indmode(char *name, int *regmask, int need_c_cvt)
     }
 
     if ('0' <= w[0] && w[0] <= '9') {
-      number = parse_number(w);
+      number = parse_number(w, 0);
       printf_number(d, sizeof(cvtbuf) - (d - cvtbuf), number);
       continue;
     }
@@ -578,8 +588,9 @@ static const char *parse_stack_el(const char *name, char *extra_reg,
     if (len < sizeof(buf) - 1) {
       strncpy(buf, s, len);
       buf[len] = 0;
+      errno = 0;
       val = strtol(buf, &endp, 16);
-      if (val == 0 || *endp != 0) {
+      if (val == 0 || *endp != 0 || errno != 0) {
         aerr("%s num parse fail for '%s'\n", __func__, buf);
         return NULL;
       }
@@ -865,7 +876,7 @@ static int parse_operand(struct parsed_opr *opr,
   else if (('0' <= words[w][0] && words[w][0] <= '9')
     || words[w][0] == '-')
   {
-    number = parse_number(words[w]);
+    number = parse_number(words[w], 0);
     opr->type = OPT_CONST;
     opr->val = number;
     printf_number(opr->name, sizeof(opr->name), number);
@@ -1741,8 +1752,9 @@ static struct parsed_equ *equ_find(struct parsed_op *po, const char *name,
     if (namelen <= 0)
       ferr(po, "equ parse failed for '%s'\n", name);
 
+    errno = 0;
     *extra_offs = strtol(p, &endp, 16);
-    if (*endp != 0)
+    if (*endp != 0 || errno != 0)
       ferr(po, "equ parse failed for '%s'\n", name);
   }
 
@@ -1786,10 +1798,11 @@ static void parse_stack_access(struct parsed_op *po,
     p = name + 4;
     if (IS_START(p, "0x"))
       p += 2;
+    errno = 0;
     offset = strtoul(p, &endp, 16);
     if (name[3] == '-')
       offset = -offset;
-    if (*endp != 0)
+    if (*endp != 0 || errno != 0)
       ferr(po, "ebp- parse of '%s' failed\n", name);
   }
   else {
@@ -1834,8 +1847,9 @@ static int parse_stack_esp_offset(struct parsed_op *po,
     // just plain offset?
     if (!IS_START(name, "esp+"))
       return -1;
+    errno = 0;
     offset = strtol(name + 4, &endp, 0);
-    if (endp == NULL || *endp != 0)
+    if (endp == NULL || *endp != 0 || errno != 0)
       return -1;
     *offset_out = offset;
     return 0;
@@ -2574,10 +2588,10 @@ static int scan_for_pop(int i, int opcnt, int magic, int reg,
         if (po->pp != NULL && po->pp->is_noreturn)
           seen_noreturn = 1;
         else
-          return -1;
+          goto out;
       }
       else
-        return -1; // deadend
+        goto out;
     }
 
     if (po->flags & (OPF_RMD|OPF_DONE|OPF_FARG))
@@ -2628,6 +2642,7 @@ static int scan_for_pop(int i, int opcnt, int magic, int reg,
     }
   }
 
+out:
   // for noreturn, assume msvc skipped stack cleanup
   return seen_noreturn ? 1 : -1;
 }
@@ -2679,8 +2694,9 @@ static int scan_for_rsave_pop_reg(int i, int magic, int reg, int set_flags)
       return -1;
   }
 
-  // nothing interesting on this path
-  return 0;
+  // nothing interesting on this path,
+  // still return ret for something recursive calls could find
+  return ret;
 }
 
 static void find_reachable_exits(int i, int opcnt, int magic,
@@ -2731,7 +2747,8 @@ 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;
+  int found = 0;
+  int e, j, ret;
 
   if (!set_flags) {
     exit_count = 0;
@@ -2741,13 +2758,23 @@ static int scan_for_pop_ret(int i, int opcnt, int reg, int set_flags)
   }
 
   for (j = 0; j < exit_count; j++) {
-    ret = scan_for_rsave_pop_reg(exits[j], i + opcnt * 16 + set_flags,
+    e = exits[j];
+    ret = scan_for_rsave_pop_reg(e, i + opcnt * 16 + set_flags,
             reg, set_flags);
-    if (ret == -1)
-      return -1;
+    if (ret != -1) {
+      found |= ret;
+      continue;
+    }
+    if (ops[e].op == OP_CALL && ops[e].pp != NULL
+      && ops[e].pp->is_noreturn)
+    {
+      // assume stack cleanup was skipped
+      continue;
+    }
+    return -1;
   }
 
-  return 1;
+  return found;
 }
 
 // scan for one or more pop of push <const>
@@ -3669,6 +3696,7 @@ static void resolve_branches_parse_calls(int opcnt)
   struct parsed_data *pd;
   struct parsed_op *po;
   const char *tmpname;
+  enum op_op prev_op;
   int i, l;
   int ret;
 
@@ -3732,8 +3760,10 @@ static void resolve_branches_parse_calls(int opcnt)
       if (pp != NULL) {
         if (pp->is_fptr)
           check_func_pp(po, pp, "fptr var call");
-        if (pp->is_noreturn)
+        if (pp->is_noreturn) {
           po->flags |= OPF_TAIL;
+          po->flags &= ~OPF_ATAIL; // most likely...
+        }
       }
       po->pp = pp;
       continue;
@@ -3778,8 +3808,14 @@ static void resolve_branches_parse_calls(int opcnt)
 tailcall:
     po->op = OP_CALL;
     po->flags |= OPF_TAIL;
-    if (i > 0 && ops[i - 1].op == OP_POP)
+    prev_op = i > 0 ? ops[i - 1].op : OP_UD2;
+    if (prev_op == OP_POP)
       po->flags |= OPF_ATAIL;
+    if (g_stack_fsz + g_bp_frame == 0 && prev_op != OP_PUSH
+      && (g_func_pp == NULL || g_func_pp->argc_stack > 0))
+    {
+      po->flags |= OPF_ATAIL;
+    }
     i--; // reprocess
   }
 }
@@ -4007,13 +4043,22 @@ static void scan_prologue_epilogue(int opcnt)
             l += ops[j].operand[1].val / 4 - 1;
           }
           else
-            ferr(&ops[j], "'pop ecx' expected\n");
+            break;
 
           ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
           j--;
         }
-        if (l != ecx_push)
+        if (l != ecx_push) {
+          if (i < opcnt && ops[i].op == OP_CALL
+            && ops[i].pp != NULL && ops[i].pp->is_noreturn)
+          {
+            // noreturn tailcall with no epilogue
+            i++;
+            found = 1;
+            continue;
+          }
           ferr(&ops[j], "epilogue scan failed\n");
+        }
 
         found = 1;
       }
@@ -4021,21 +4066,25 @@ static void scan_prologue_epilogue(int opcnt)
       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)
+            || ops[j].operand[1].type != OPT_CONST)
         {
-          if (ops[i].op == OP_CALL && ops[i].pp != NULL
-            && ops[i].pp->is_noreturn)
+          if (i < opcnt && ops[i].op == OP_CALL
+            && ops[i].pp != NULL && ops[i].pp->is_noreturn)
           {
             // noreturn tailcall with no epilogue
             i++;
+            found = 1;
             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
+        if (ops[j].operand[1].val < g_stack_fsz)
+          ferr(&ops[j], "esp adj is too low (need %d)\n", g_stack_fsz);
+
+        ops[j].operand[1].val -= g_stack_fsz; // for stack arg scanner
+        if (ops[j].operand[1].val == 0)
+          ops[j].flags |= OPF_RMD | OPF_DONE | OPF_NOREGS;
         found = 1;
       }
 
@@ -4627,6 +4676,9 @@ static struct parsed_proto *process_call(int i, int opcnt)
         ferr(po, "too many args for '%s'\n", tmpname);
     }
     if (pp->argc_stack > adj / 4) {
+      if (pp->is_noreturn)
+        // assume no stack adjust was emited
+        goto out;
       fnote(po, "(this call)\n");
       ferr(&ops[ret], "stack tracking failed for '%s': %x %x\n",
         tmpname, pp->argc_stack * 4, adj);
@@ -4639,6 +4691,7 @@ static struct parsed_proto *process_call(int i, int opcnt)
     ferr(po, "missing esp_adjust for vararg func '%s'\n",
       pp->name);
 
+out:
   return pp;
 }
 
@@ -4669,8 +4722,10 @@ static int collect_call_args_no_push(int i, struct parsed_proto *pp,
       ret = parse_stack_esp_offset(po, po->operand[0].name, &offset);
       if (ret != 0)
         continue;
-      if (offset < 0 || offset >= pp->argc_stack * 4 || (offset & 3))
-        ferr(po, "bad offset %d (%d args)\n", offset, pp->argc_stack);
+      if (offset < 0 || offset >= pp->argc_stack * 4 || (offset & 3)) {
+        //ferr(po, "offset %d, %d args\n", offset, pp->argc_stack);
+        continue;
+      }
 
       arg = base_arg + offset / 4;
       po->p_argnext = -1;
@@ -4889,8 +4944,8 @@ static int collect_call_args_r(struct parsed_op *po, int i,
 
       pp_tmp = ops[j].pp;
       if (pp_tmp == NULL)
-        ferr(po, "arg collect hit unparsed call '%s'\n",
-          ops[j].operand[0].name);
+        ferr(po, "arg collect %d/%d hit unparsed call '%s'\n",
+          arg, pp->argc, 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);
@@ -6695,10 +6750,11 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt)
           lmod_cast_s(po, po->operand[0].lmod), buf2);
         last_arith_dst = &po->operand[0];
         delayed_flag_op = NULL;
-        if (pfomask & (1 << PFO_C)) {
+        if (pfomask & PFOB_C) {
           fprintf(fout, "\n  cond_c = (%s != 0);", buf1);
-          pfomask &= ~(1 << PFO_C);
+          pfomask &= ~PFOB_C;
         }
+        output_std_flags(fout, po, &pfomask, buf1);
         break;
 
       case OP_IMUL:
@@ -6904,10 +6960,13 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt)
           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");
+          int check_compat =
+            g_func_pp->is_stdcall && g_func_pp->argc_stack > 0;
+          check_compat |= pp->argc_stack > 0;
+          if (check_compat
+           && (pp->argc_stack != g_func_pp->argc_stack
+               || pp->is_stdcall != g_func_pp->is_stdcall))
+            ferr(po, "incompatible arg-reuse tailcall\n");
           if (g_func_pp->has_retreg)
             ferr(po, "TODO: retreg+tailcall\n");
 
@@ -6946,7 +7005,7 @@ static void gen_func(FILE *fout, FILE *fhdr, const char *funcn, int opcnt)
               if (pp->arg[arg].type.is_retreg)
                 fprintf(fout, "&%s", pp->arg[arg].reg);
               else if (IS(pp->arg[arg].reg, "ebp")
-                    && !(po->flags & OPF_EBP_S))
+                    && g_bp_frame && !(po->flags & OPF_EBP_S))
               {
                 // rare special case
                 fprintf(fout, "%s(u32)&sf.b[sizeof(sf)]", cast);
@@ -7738,8 +7797,11 @@ static void gen_hdr_dep_pass(int i, int opcnt, unsigned char *cbits,
       po->regmask_dst |= 1 << xAX;
 
       dep = hg_fp_find_dep(fp, po->operand[0].name);
-      if (dep != NULL)
+      if (dep != NULL) {
         dep->regmask_live = regmask_save | regmask_dst;
+        if (g_bp_frame && !(po->flags & OPF_EBP_S))
+          dep->regmask_live |= 1 << xBP;
+      }
     }
     else if (po->op == OP_RET) {
       if (po->operand_cnt > 0) {
@@ -7958,7 +8020,7 @@ static void gen_hdr(const char *funcn, int opcnt)
       // noreturn OS functions
       break;
     }
-    if (ops[i].op != OP_NOP)
+    if (ops[i].op != OP_NOP && ops[i].op != OPP_ABORT)
       ferr(&ops[i], "unreachable code\n");
   }
 
@@ -8286,10 +8348,14 @@ static int ida_xrefs_show_need(FILE *fasm, char *p,
   long pos;
 
   p = strrchr(p, ';');
-  if (p != NULL && *p == ';' && IS_START(p + 2, "DATA XREF: ")) {
-    p += 13;
-    if (is_xref_needed(p, rlist, rlist_len))
+  if (p != NULL && *p == ';') {
+    if (IS_START(p + 2, "sctref"))
       return 1;
+    if (IS_START(p + 2, "DATA XREF: ")) {
+      p += 13;
+      if (is_xref_needed(p, rlist, rlist_len))
+        return 1;
+    }
   }
 
   pos = ftell(fasm);
@@ -8308,6 +8374,12 @@ static int ida_xrefs_show_need(FILE *fasm, char *p,
 
     p = strrchr(p, ';');
     p += 2;
+
+    if (IS_START(p, "sctref")) {
+      found_need = 1;
+      break;
+    }
+
     // it's printed once, but no harm to check again
     if (IS_START(p, "DATA XREF: "))
       p += 11;
@@ -8501,7 +8573,7 @@ static int cmp_chunks(const void *p1, const void *p2)
   return strcmp(c1->name, c2->name);
 }
 
-static void scan_ahead(FILE *fasm)
+static void scan_ahead_for_chunks(FILE *fasm)
 {
   char words[2][256];
   char line[256];
@@ -8842,7 +8914,7 @@ int main(int argc, char *argv[])
           if (addr > f_addr && !scanned_ahead) {
             //anote("scan_ahead caused by '%s', addr %lx\n",
             //  g_func, addr);
-            scan_ahead(fasm);
+            scan_ahead_for_chunks(fasm);
             scanned_ahead = 1;
             func_chunks_sorted = 0;
           }
@@ -8967,7 +9039,7 @@ do_pending_endp:
           if (pd->type == OPT_OFFSET)
             pd->d[pd->count].u.label = strdup(words[i]);
           else
-            pd->d[pd->count].u.val = parse_number(words[i]);
+            pd->d[pd->count].u.val = parse_number(words[i], 0);
           pd->d[pd->count].bt_i = -1;
           pd->count++;
         }
@@ -9146,7 +9218,7 @@ do_pending_endp:
       else
         aerr("bad lmod: '%s'\n", words[2]);
 
-      g_eqs[g_eqcnt].offset = parse_number(words[4]);
+      g_eqs[g_eqcnt].offset = parse_number(words[4], 0);
       g_eqcnt++;
       continue;
     }