X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=tools%2Fmkbridge.c;h=2066f02197d6f1d58d8597e8d913922b2beeb0bf;hb=5c024ef78bfc9bac8b67870c169ab8732d8f7d89;hp=3b3f4cebf0bb54c7f33bb3af1116eb5a9a1af9de;hpb=bd96f6564765a72d647fbf31de3120ad7f363653;p=ia32rtools.git

diff --git a/tools/mkbridge.c b/tools/mkbridge.c
index 3b3f4ce..2066f02 100644
--- a/tools/mkbridge.c
+++ b/tools/mkbridge.c
@@ -23,7 +23,8 @@ static int is_x86_reg_saved(const char *reg)
 	return !nosave;
 }
 
-static void out_toasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
+static void out_toasm_x86(FILE *f, const char *sym_in,
+	const char *sym_out, const struct parsed_proto *pp)
 {
 	int must_save = 0;
 	int sarg_ofs = 1; // stack offset to args, in DWORDs
@@ -40,11 +41,14 @@ static void out_toasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
 			must_save |= is_x86_reg_saved(pp->arg[i].reg);
 	}
 
-	fprintf(f, ".global _%s\n", sym);
-	fprintf(f, "_%s:\n", sym);
+	fprintf(f, ".global %s%s\n", pp->is_fastcall ? "@" : "_", sym_in);
+	fprintf(f, "%s%s:\n", pp->is_fastcall ? "@" : "_", sym_in);
 
-	if (pp->argc_reg == 0 && !pp->is_stdcall) {
-		fprintf(f, "\tjmp %s\n\n", sym);
+	if (pp->argc_reg == 0 || pp->is_fastcall) {
+		fprintf(f, "\t# %s\n",
+		  pp->is_fastcall ? "__fastcall" :
+		  (pp->is_stdcall ? "__stdcall" : "__cdecl"));
+		fprintf(f, "\tjmp %s\n\n", sym_out);
 		return;
 	}
 
@@ -56,7 +60,7 @@ static void out_toasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
 			fprintf(f, "\tmovl %d(%%esp), %%%s\n",
 				(i + sarg_ofs) * 4, pp->arg[i].reg);
 		}
-		fprintf(f, "\tjmp %s\n\n", sym);
+		fprintf(f, "\tjmp %s\n\n", sym_out);
 		return;
 	}
 
@@ -89,7 +93,7 @@ static void out_toasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
 	}
 
 	fprintf(f, "\n\t# %s\n", pp->is_stdcall ? "__stdcall" : "__cdecl");
-	fprintf(f, "\tcall %s\n\n", sym);
+	fprintf(f, "\tcall %s\n\n", sym_out);
 
 	if (args_repushed && !pp->is_stdcall)
 		fprintf(f, "\tadd $%d,%%esp\n", args_repushed * 4);
@@ -103,11 +107,14 @@ static void out_toasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
 	fprintf(f, "\tret\n\n");
 }
 
-static void out_fromasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
+static void out_fromasm_x86(FILE *f, const char *sym,
+	const struct parsed_proto *pp)
 {
 	int sarg_ofs = 1; // stack offset to args, in DWORDs
+	int saved_regs = 0;
 	int argc_repush;
 	int stack_args;
+	int ret64;
 	int i;
 
 	argc_repush = pp->argc;
@@ -117,31 +124,49 @@ static void out_fromasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
 		stack_args = argc_repush - pp->argc_reg;
 	}
 
-	fprintf(f, "# %s\n", pp->is_stdcall ? "__stdcall" : "__cdecl");
-	fprintf(f, ".global %s\n", sym);
+	ret64 = strstr(pp->ret_type.name, "int64") != NULL;
+
+	fprintf(f, "# %s",
+	  pp->is_fastcall ? "__fastcall" :
+	  (pp->is_stdcall ? "__stdcall" : "__cdecl"));
+	if (ret64)
+		 fprintf(f, " ret64");
+	fprintf(f, "\n.global %s\n", sym);
 	fprintf(f, "%s:\n", sym);
 
-	if (pp->argc_reg == 0 && !pp->is_stdcall) {
-		fprintf(f, "\tjmp _%s\n\n", sym);
+	if (pp->argc_reg == 0 || pp->is_fastcall) {
+		fprintf(f, "\tjmp %s%s",
+			pp->is_fastcall ? "@" : "_", sym);
+		if (pp->is_stdcall && pp->argc > 0)
+			fprintf(f, "@%d", pp->argc * 4);
+		fprintf(f, "\n\n");
 		return;
 	}
 
-	// scratch reg, must not be eax or edx (for ret edx:eax)
-	fprintf(f, "\tpushl %%ebx\n");
+	// at least sc sub_47B150 needs edx to be preserved
+	// int64 returns use edx:eax - no edx save
+	// we use ecx also as scratch
+	fprintf(f, "\tpushl %%ecx\n");
+	saved_regs++;
 	sarg_ofs++;
+	if (!ret64) {
+		fprintf(f, "\tpushl %%edx\n");
+		saved_regs++;
+		sarg_ofs++;
+	}
 
 	// construct arg stack
 	for (i = argc_repush - 1; i >= 0; i--) {
 		if (pp->arg[i].reg == NULL) {
-			fprintf(f, "\tmovl %d(%%esp), %%ebx\n",
+			fprintf(f, "\tmovl %d(%%esp), %%ecx\n",
 				(sarg_ofs + stack_args - 1) * 4);
-			fprintf(f, "\tpushl %%ebx\n");
+			fprintf(f, "\tpushl %%ecx\n");
 			stack_args--;
 		}
 		else {
-			if (IS(pp->arg[i].reg, "ebx"))
-				// must reload original ebx
-				fprintf(f, "\tmovl %d(%%esp), %%ebx\n",
+			if (IS(pp->arg[i].reg, "ecx"))
+				// must reload original ecx
+				fprintf(f, "\tmovl %d(%%esp), %%ecx\n",
 					(sarg_ofs - 2) * 4);
 
 			fprintf(f, "\tpushl %%%s\n", pp->arg[i].reg);
@@ -152,10 +177,13 @@ static void out_fromasm_x86(FILE *f, char *sym, const struct parsed_proto *pp)
 	// no worries about calling conventions - always __cdecl
 	fprintf(f, "\n\tcall _%s\n\n", sym);
 
-	if (sarg_ofs > 2)
-		fprintf(f, "\tadd $%d,%%esp\n", (sarg_ofs - 2) * 4);
+	if (sarg_ofs > saved_regs + 1)
+		fprintf(f, "\tadd $%d,%%esp\n",
+			(sarg_ofs - (saved_regs + 1)) * 4);
 
-	fprintf(f, "\tpopl %%ebx\n");
+	if (!ret64)
+		fprintf(f, "\tpopl %%edx\n");
+	fprintf(f, "\tpopl %%ecx\n");
 
 	if (pp->is_stdcall && pp->argc_stack)
 		fprintf(f, "\tret $%d\n\n", pp->argc_stack * 4);
@@ -168,8 +196,10 @@ int main(int argc, char *argv[])
 	FILE *fout, *fsyms_to, *fsyms_from, *fhdr;
 	const struct parsed_proto *pp;
 	char line[256];
+	char sym_noat[256];
 	char sym[256];
-	int ret;
+	char *p;
+	int ret = 1;
 
 	if (argc != 5) {
 		printf("usage:\n%s <bridge.s> <toasm_symf> <fromasm_symf> <hdrf>\n",
@@ -199,11 +229,17 @@ int main(int argc, char *argv[])
 		if (sym[0] == 0 || sym[0] == ';' || sym[0] == '#')
 			continue;
 
-		pp = proto_parse(fhdr, sym);
+		// IDA asm doesn't do '@' notation..
+		strcpy(sym_noat, sym);
+		p = strchr(sym_noat, '@');
+		if (p != NULL)
+			*p = 0;
+
+		pp = proto_parse(fhdr, sym_noat, 0);
 		if (pp == NULL)
 			goto out;
 
-		out_toasm_x86(fout, sym, pp);
+		out_toasm_x86(fout, sym, sym_noat, pp);
 	}
 
 	fprintf(fout, "# from asm\n\n");
@@ -214,7 +250,7 @@ int main(int argc, char *argv[])
 		if (sym[0] == 0 || sym[0] == ';' || sym[0] == '#')
 			continue;
 
-		pp = proto_parse(fhdr, sym);
+		pp = proto_parse(fhdr, sym, 0);
 		if (pp == NULL)
 			goto out;