[ia32rtools.git] / tools / mkbridge.c

/*
 * ia32rtools
 * (C) notaz, 2013,2014
 *
 * This work is licensed under the terms of 3-clause BSD license.
 * See COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "my_assert.h"
#include "my_str.h"
#include "common.h"

#include "protoparse.h"

static const char *c_save_regs[] = { "ebx", "esi", "edi", "ebp" };

static int is_x86_reg_saved(const char *reg)
{
	static const char *nosave_regs[] = { "eax", "edx", "ecx" };
	int nosave = 0;
	int r;

	for (r = 0; r < ARRAY_SIZE(nosave_regs); r++)
		if (strcmp(reg, nosave_regs[r]) == 0)
			nosave = 1;

	return !nosave;
}

// output decorated name
static const char *pp_to_name(const struct parsed_proto *pp)
{
	static char buf[256];
	char atval[16];

	if (!pp->is_fastcall && pp->argc_reg != 0) {
		// can only be handled by __cdecl C func
		snprintf(buf, sizeof(buf), "_%s", pp->name);
		return buf;
	}

	atval[0] = 0;
	if (pp->is_stdcall) {
		snprintf(atval, sizeof(atval), "@%d",
			pp->argc * 4);
	}
	snprintf(buf, sizeof(buf), "%s%s%s",
		pp->is_fastcall ? "@" : "_",
		pp->name, atval);

	return buf;
}

static void out_toasm_x86(FILE *f, const char *sym_out,
	const struct parsed_proto *pp)
{
	int must_save = 0;
	int sarg_ofs = 1; // stack offset to args, in DWORDs
	int args_repushed = 0;
	int argc_repush;
	const char *name;
	int i;

	argc_repush = pp->argc;
	if (pp->is_vararg)
		argc_repush = ARRAY_SIZE(pp->arg); // hopefully enough?

	for (i = 0; i < pp->argc; i++) {
		if (pp->arg[i].reg != NULL)
			must_save |= is_x86_reg_saved(pp->arg[i].reg);
	}

	name = pp_to_name(pp);
	fprintf(f, ".global %s\n", name);
	fprintf(f, "%s:\n", name);

	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;
	}

	if (pp->argc_stack == 0 && !must_save && !pp->is_stdcall
	     && !pp->is_vararg && !pp->has_retreg)
	{
		// load arg regs
		for (i = 0; i < pp->argc; i++) {
			fprintf(f, "\tmovl %d(%%esp), %%%s\n",
				(i + sarg_ofs) * 4, pp->arg[i].reg);
		}
		fprintf(f, "\tjmp %s\n\n", sym_out);
		return;
	}

	// asm_stack_args | saved_regs | ra | args_from_c

	// save the regs
	// because we don't always know what we are calling,
	// be safe and save everything that has to be saved in __cdecl
	for (i = 0; i < ARRAY_SIZE(c_save_regs); i++) {
		fprintf(f, "\tpushl %%%s\n", c_save_regs[i]);
		sarg_ofs++;
	}

	// reconstruct arg stack for asm
	for (i = argc_repush - 1; i >= 0; i--) {
		if (pp->arg[i].reg == NULL) {
			fprintf(f, "\tmovl %d(%%esp), %%eax\n",
				(i + sarg_ofs) * 4);
			fprintf(f, "\tpushl %%eax\n");
			sarg_ofs++;
			args_repushed++;
		}
	}

	// load arg regs
	for (i = 0; i < pp->argc; i++) {
		if (pp->arg[i].reg != NULL) {
			fprintf(f, "\tmovl %d(%%esp), %%%s\n",
				(i + sarg_ofs) * 4, pp->arg[i].reg);
			if (pp->arg[i].type.is_retreg)
				fprintf(f, "\tmovl (%%%s), %%%s\n",
					pp->arg[i].reg, pp->arg[i].reg);
		}
	}

	fprintf(f, "\n\t# %s\n", pp->is_stdcall ? "__stdcall" : "__cdecl");
	fprintf(f, "\tcall %s\n\n", sym_out);

	if (args_repushed && !pp->is_stdcall) {
		fprintf(f, "\tadd $%d,%%esp\n", args_repushed * 4);
		sarg_ofs -= args_repushed;
	}

	// update the retreg regs
	if (pp->has_retreg) {
		for (i = 0; i < pp->argc; i++) {
			if (pp->arg[i].type.is_retreg) {
				fprintf(f, "\tmovl %d(%%esp), %%ecx\n"
					   "\tmovl %%%s, (%%ecx)\n",
					(i + sarg_ofs) * 4, pp->arg[i].reg);
			}
		}
	}

	// restore regs
	for (i = ARRAY_SIZE(c_save_regs) - 1; i >= 0; i--)
		fprintf(f, "\tpopl %%%s\n", c_save_regs[i]);

	fprintf(f, "\tret\n\n");
}

static void out_fromasm_x86(FILE *f, const char *sym,
	const struct parsed_proto *pp)
{
	int reg_ofs[ARRAY_SIZE(pp->arg)];
	int sarg_ofs = 1; // stack offset to args, in DWORDs
	int saved_regs = 0;
	int ecx_ofs = -1;
	int edx_ofs = -1;
	int c_is_stdcall;
	int argc_repush;
	int stack_args;
	int ret64;
	int i;

	argc_repush = pp->argc;
	stack_args = pp->argc_stack;
	if (pp->is_vararg) {
		argc_repush = ARRAY_SIZE(pp->arg); // hopefully enough?
		stack_args = argc_repush - pp->argc_reg;
	}

	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");
	if (!pp->is_fastcall && pp->argc_reg != 0)
		fprintf(f, " +reg");

	if (pp->is_stdcall && !pp->is_fastcall && pp->argc_reg != 0
	    && !IS_START(sym, "sub_") && !IS_START(sym, "f_"))
	{
		// alias for possible .def export
		char sym2[256];

		snprintf(sym2, sizeof(sym2), "_%s@%d",
			 sym, pp->argc * 4);
		fprintf(f, "\n.global %s # for .def\n", sym2);
		fprintf(f, "%s:", sym2);
	}
	fprintf(f, "\n.global %s\n", sym);
	fprintf(f, "%s:\n", sym);

	if ((pp->argc_reg == 0 || pp->is_fastcall)
	    && !IS(pp->name, "storm_491")) // wants edx save :(
	{
		fprintf(f, "\tjmp %s\n\n", pp_to_name(pp));
		return;
	}

	c_is_stdcall = (pp->argc_reg == 0 && pp->is_stdcall);

	// 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++;
	ecx_ofs = sarg_ofs;
	if (!ret64) {
		fprintf(f, "\tpushl %%edx\n");
		saved_regs++;
		sarg_ofs++;
		edx_ofs = sarg_ofs;
	}

	// need space for retreg args
	if (pp->has_retreg) {
		for (i = 0; i < pp->argc; i++) {
			if (!pp->arg[i].type.is_retreg)
				continue;
			if (IS(pp->arg[i].reg, "ecx") && ecx_ofs >= 0) {
				reg_ofs[i] = ecx_ofs;
				continue;
			}
			if (IS(pp->arg[i].reg, "edx") && edx_ofs >= 0) {
				reg_ofs[i] = edx_ofs;
				continue;
			}
			fprintf(f, "\tpushl %%%s\n", pp->arg[i].reg);
			saved_regs++;
			sarg_ofs++;
			reg_ofs[i] = sarg_ofs;
		}
	}

	// construct arg stack
	for (i = argc_repush - 1; i >= 0; i--) {
		if (pp->arg[i].reg == NULL) {
			fprintf(f, "\tmovl %d(%%esp), %%ecx\n",
				(sarg_ofs + stack_args - 1) * 4);
			fprintf(f, "\tpushl %%ecx\n");
			stack_args--;
		}
		else {
			const char *reg = pp->arg[i].reg;
			if (pp->arg[i].type.is_retreg) {
				reg = "ecx";
				fprintf(f, "\tlea %d(%%esp), %%ecx\n",
				  (sarg_ofs - reg_ofs[i]) * 4);
			}
			else if (IS(reg, "ecx"))
				// must reload original ecx
				fprintf(f, "\tmovl %d(%%esp), %%ecx\n",
					(sarg_ofs - 2) * 4);

			fprintf(f, "\tpushl %%%s\n", reg);
		}
		sarg_ofs++;
	}

	fprintf(f, "\n\tcall %s\n\n", pp_to_name(pp));

	if (!c_is_stdcall && sarg_ofs > saved_regs + 1)
		fprintf(f, "\tadd $%d,%%esp\n",
			(sarg_ofs - (saved_regs + 1)) * 4);

	// pop retregs
	if (pp->has_retreg) {
		for (i = pp->argc - 1; i >= 0; i--) {
			if (!pp->arg[i].type.is_retreg)
				continue;
			if (IS(pp->arg[i].reg, "ecx") && ecx_ofs >= 0) {
				continue;
			}
			if (IS(pp->arg[i].reg, "edx") && edx_ofs >= 0) {
				continue;
			}
			fprintf(f, "\tpopl %%%s\n", pp->arg[i].reg);
		}
	}

	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);
	else
		fprintf(f, "\tret\n\n");
}

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];
	char *p;
	int ret = 1;

	if (argc != 5) {
		printf("usage:\n%s <bridge.s> <toasm_symf> <fromasm_symf> <hdrf>\n",
			argv[0]);
		return 1;
	}

	hdrfn = argv[4];
	fhdr = fopen(hdrfn, "r");
	my_assert_not(fhdr, NULL);

	fsyms_from = fopen(argv[3], "r");
	my_assert_not(fsyms_from, NULL);

	fsyms_to = fopen(argv[2], "r");
	my_assert_not(fsyms_to, NULL);

	fout = fopen(argv[1], "w");
	my_assert_not(fout, NULL);

	fprintf(fout, ".text\n\n");
	fprintf(fout, "# C -> asm\n\n");

	while (fgets(line, sizeof(line), fsyms_to))
	{
		next_word(sym, sizeof(sym), line);
		if (sym[0] == 0 || sym[0] == ';' || sym[0] == '#')
			continue;

		// 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_noat, pp);
	}

	fprintf(fout, "# asm -> C\n\n");

	while (fgets(line, sizeof(line), fsyms_from))
	{
		next_word(sym, sizeof(sym), line);
		if (sym[0] == 0 || sym[0] == ';' || sym[0] == '#')
			continue;

		pp = proto_parse(fhdr, sym, 0);
		if (pp == NULL)
			goto out;

		out_fromasm_x86(fout, sym, pp);
	}

	ret = 0;
out:
	fclose(fout);
	fclose(fsyms_to);
	fclose(fsyms_from);
	fclose(fhdr);
	if (ret)
		remove(argv[1]);

	return ret;
}
Commit	Line	Data
	1	/*
	2	* ia32rtools
	3	* (C) notaz, 2013,2014
	4	*
	5	* This work is licensed under the terms of 3-clause BSD license.
	6	* See COPYING file in the top-level directory.
	7	*/
	8
	9	#include <stdio.h>
	10	#include <stdlib.h>
	11	#include <string.h>
	12
	13	#include "my_assert.h"
	14	#include "my_str.h"
	15	#include "common.h"
	16
	17	#include "protoparse.h"
	18
	19	static const char *c_save_regs[] = { "ebx", "esi", "edi", "ebp" };
	20
	21	static int is_x86_reg_saved(const char *reg)
	22	{
	23	static const char *nosave_regs[] = { "eax", "edx", "ecx" };
	24	int nosave = 0;
	25	int r;
	26
	27	for (r = 0; r < ARRAY_SIZE(nosave_regs); r++)
	28	if (strcmp(reg, nosave_regs[r]) == 0)
	29	nosave = 1;
	30
	31	return !nosave;
	32	}
	33
	34	// output decorated name
	35	static const char pp_to_name(const struct parsed_proto pp)
	36	{
	37	static char buf[256];
	38	char atval[16];
	39
	40	if (!pp->is_fastcall && pp->argc_reg != 0) {
	41	// can only be handled by __cdecl C func
	42	snprintf(buf, sizeof(buf), "_%s", pp->name);
	43	return buf;
	44	}
	45
	46	atval[0] = 0;
	47	if (pp->is_stdcall) {
	48	snprintf(atval, sizeof(atval), "@%d",
	49	pp->argc * 4);
	50	}
	51	snprintf(buf, sizeof(buf), "%s%s%s",
	52	pp->is_fastcall ? "@" : "_",
	53	pp->name, atval);
	54
	55	return buf;
	56	}
	57
	58	static void out_toasm_x86(FILE f, const char sym_out,
	59	const struct parsed_proto *pp)
	60	{
	61	int must_save = 0;
	62	int sarg_ofs = 1; // stack offset to args, in DWORDs
	63	int args_repushed = 0;
	64	int argc_repush;
	65	const char *name;
	66	int i;
	67
	68	argc_repush = pp->argc;
	69	if (pp->is_vararg)
	70	argc_repush = ARRAY_SIZE(pp->arg); // hopefully enough?
	71
	72	for (i = 0; i < pp->argc; i++) {
	73	if (pp->arg[i].reg != NULL)
	74	must_save \|= is_x86_reg_saved(pp->arg[i].reg);
	75	}
	76
	77	name = pp_to_name(pp);
	78	fprintf(f, ".global %s\n", name);
	79	fprintf(f, "%s:\n", name);
	80
	81	if (pp->argc_reg == 0 \|\| pp->is_fastcall) {
	82	fprintf(f, "\t# %s\n",
	83	pp->is_fastcall ? "__fastcall" :
	84	(pp->is_stdcall ? "__stdcall" : "__cdecl"));
	85	fprintf(f, "\tjmp %s\n\n", sym_out);
	86	return;
	87	}
	88
	89	if (pp->argc_stack == 0 && !must_save && !pp->is_stdcall
	90	&& !pp->is_vararg && !pp->has_retreg)
	91	{
	92	// load arg regs
	93	for (i = 0; i < pp->argc; i++) {
	94	fprintf(f, "\tmovl %d(%%esp), %%%s\n",
	95	(i + sarg_ofs) * 4, pp->arg[i].reg);
	96	}
	97	fprintf(f, "\tjmp %s\n\n", sym_out);
	98	return;
	99	}
	100
	101	// asm_stack_args \| saved_regs \| ra \| args_from_c
	102
	103	// save the regs
	104	// because we don't always know what we are calling,
	105	// be safe and save everything that has to be saved in __cdecl
	106	for (i = 0; i < ARRAY_SIZE(c_save_regs); i++) {
	107	fprintf(f, "\tpushl %%%s\n", c_save_regs[i]);
	108	sarg_ofs++;
	109	}
	110
	111	// reconstruct arg stack for asm
	112	for (i = argc_repush - 1; i >= 0; i--) {
	113	if (pp->arg[i].reg == NULL) {
	114	fprintf(f, "\tmovl %d(%%esp), %%eax\n",
	115	(i + sarg_ofs) * 4);
	116	fprintf(f, "\tpushl %%eax\n");
	117	sarg_ofs++;
	118	args_repushed++;
	119	}
	120	}
	121
	122	// load arg regs
	123	for (i = 0; i < pp->argc; i++) {
	124	if (pp->arg[i].reg != NULL) {
	125	fprintf(f, "\tmovl %d(%%esp), %%%s\n",
	126	(i + sarg_ofs) * 4, pp->arg[i].reg);
	127	if (pp->arg[i].type.is_retreg)
	128	fprintf(f, "\tmovl (%%%s), %%%s\n",
	129	pp->arg[i].reg, pp->arg[i].reg);
	130	}
	131	}
	132
	133	fprintf(f, "\n\t# %s\n", pp->is_stdcall ? "__stdcall" : "__cdecl");
	134	fprintf(f, "\tcall %s\n\n", sym_out);
	135
	136	if (args_repushed && !pp->is_stdcall) {
	137	fprintf(f, "\tadd $%d,%%esp\n", args_repushed * 4);
	138	sarg_ofs -= args_repushed;
	139	}
	140
	141	// update the retreg regs
	142	if (pp->has_retreg) {
	143	for (i = 0; i < pp->argc; i++) {
	144	if (pp->arg[i].type.is_retreg) {
	145	fprintf(f, "\tmovl %d(%%esp), %%ecx\n"
	146	"\tmovl %%%s, (%%ecx)\n",
	147	(i + sarg_ofs) * 4, pp->arg[i].reg);
	148	}
	149	}
	150	}
	151
	152	// restore regs
	153	for (i = ARRAY_SIZE(c_save_regs) - 1; i >= 0; i--)
	154	fprintf(f, "\tpopl %%%s\n", c_save_regs[i]);
	155
	156	fprintf(f, "\tret\n\n");
	157	}
	158
	159	static void out_fromasm_x86(FILE f, const char sym,
	160	const struct parsed_proto *pp)
	161	{
	162	int reg_ofs[ARRAY_SIZE(pp->arg)];
	163	int sarg_ofs = 1; // stack offset to args, in DWORDs
	164	int saved_regs = 0;
	165	int ecx_ofs = -1;
	166	int edx_ofs = -1;
	167	int c_is_stdcall;
	168	int argc_repush;
	169	int stack_args;
	170	int ret64;
	171	int i;
	172
	173	argc_repush = pp->argc;
	174	stack_args = pp->argc_stack;
	175	if (pp->is_vararg) {
	176	argc_repush = ARRAY_SIZE(pp->arg); // hopefully enough?
	177	stack_args = argc_repush - pp->argc_reg;
	178	}
	179
	180	ret64 = strstr(pp->ret_type.name, "int64") != NULL;
	181
	182	fprintf(f, "# %s",
	183	pp->is_fastcall ? "__fastcall" :
	184	(pp->is_stdcall ? "__stdcall" : "__cdecl"));
	185	if (ret64)
	186	fprintf(f, " ret64");
	187	if (!pp->is_fastcall && pp->argc_reg != 0)
	188	fprintf(f, " +reg");
	189
	190	if (pp->is_stdcall && !pp->is_fastcall && pp->argc_reg != 0
	191	&& !IS_START(sym, "sub_") && !IS_START(sym, "f_"))
	192	{
	193	// alias for possible .def export
	194	char sym2[256];
	195
	196	snprintf(sym2, sizeof(sym2), "_%s@%d",
	197	sym, pp->argc * 4);
	198	fprintf(f, "\n.global %s # for .def\n", sym2);
	199	fprintf(f, "%s:", sym2);
	200	}
	201	fprintf(f, "\n.global %s\n", sym);
	202	fprintf(f, "%s:\n", sym);
	203
	204	if ((pp->argc_reg == 0 \|\| pp->is_fastcall)
	205	&& !IS(pp->name, "storm_491")) // wants edx save :(
	206	{
	207	fprintf(f, "\tjmp %s\n\n", pp_to_name(pp));
	208	return;
	209	}
	210
	211	c_is_stdcall = (pp->argc_reg == 0 && pp->is_stdcall);
	212
	213	// at least sc sub_47B150 needs edx to be preserved
	214	// int64 returns use edx:eax - no edx save
	215	// we use ecx also as scratch
	216	fprintf(f, "\tpushl %%ecx\n");
	217	saved_regs++;
	218	sarg_ofs++;
	219	ecx_ofs = sarg_ofs;
	220	if (!ret64) {
	221	fprintf(f, "\tpushl %%edx\n");
	222	saved_regs++;
	223	sarg_ofs++;
	224	edx_ofs = sarg_ofs;
	225	}
	226
	227	// need space for retreg args
	228	if (pp->has_retreg) {
	229	for (i = 0; i < pp->argc; i++) {
	230	if (!pp->arg[i].type.is_retreg)
	231	continue;
	232	if (IS(pp->arg[i].reg, "ecx") && ecx_ofs >= 0) {
	233	reg_ofs[i] = ecx_ofs;
	234	continue;
	235	}
	236	if (IS(pp->arg[i].reg, "edx") && edx_ofs >= 0) {
	237	reg_ofs[i] = edx_ofs;
	238	continue;
	239	}
	240	fprintf(f, "\tpushl %%%s\n", pp->arg[i].reg);
	241	saved_regs++;
	242	sarg_ofs++;
	243	reg_ofs[i] = sarg_ofs;
	244	}
	245	}
	246
	247	// construct arg stack
	248	for (i = argc_repush - 1; i >= 0; i--) {
	249	if (pp->arg[i].reg == NULL) {
	250	fprintf(f, "\tmovl %d(%%esp), %%ecx\n",
	251	(sarg_ofs + stack_args - 1) * 4);
	252	fprintf(f, "\tpushl %%ecx\n");
	253	stack_args--;
	254	}
	255	else {
	256	const char *reg = pp->arg[i].reg;
	257	if (pp->arg[i].type.is_retreg) {
	258	reg = "ecx";
	259	fprintf(f, "\tlea %d(%%esp), %%ecx\n",
	260	(sarg_ofs - reg_ofs[i]) * 4);
	261	}
	262	else if (IS(reg, "ecx"))
	263	// must reload original ecx
	264	fprintf(f, "\tmovl %d(%%esp), %%ecx\n",
	265	(sarg_ofs - 2) * 4);
	266
	267	fprintf(f, "\tpushl %%%s\n", reg);
	268	}
	269	sarg_ofs++;
	270	}
	271
	272	fprintf(f, "\n\tcall %s\n\n", pp_to_name(pp));
	273
	274	if (!c_is_stdcall && sarg_ofs > saved_regs + 1)
	275	fprintf(f, "\tadd $%d,%%esp\n",
	276	(sarg_ofs - (saved_regs + 1)) * 4);
	277
	278	// pop retregs
	279	if (pp->has_retreg) {
	280	for (i = pp->argc - 1; i >= 0; i--) {
	281	if (!pp->arg[i].type.is_retreg)
	282	continue;
	283	if (IS(pp->arg[i].reg, "ecx") && ecx_ofs >= 0) {
	284	continue;
	285	}
	286	if (IS(pp->arg[i].reg, "edx") && edx_ofs >= 0) {
	287	continue;
	288	}
	289	fprintf(f, "\tpopl %%%s\n", pp->arg[i].reg);
	290	}
	291	}
	292
	293	if (!ret64)
	294	fprintf(f, "\tpopl %%edx\n");
	295	fprintf(f, "\tpopl %%ecx\n");
	296
	297	if (pp->is_stdcall && pp->argc_stack)
	298	fprintf(f, "\tret $%d\n\n", pp->argc_stack * 4);
	299	else
	300	fprintf(f, "\tret\n\n");
	301	}
	302
	303	int main(int argc, char *argv[])
	304	{
	305	FILE fout, fsyms_to, fsyms_from, fhdr;
	306	const struct parsed_proto *pp;
	307	char line[256];
	308	char sym_noat[256];
	309	char sym[256];
	310	char *p;
	311	int ret = 1;
	312
	313	if (argc != 5) {
	314	printf("usage:\n%s <bridge.s> <toasm_symf> <fromasm_symf> <hdrf>\n",
	315	argv[0]);
	316	return 1;
	317	}
	318
	319	hdrfn = argv[4];
	320	fhdr = fopen(hdrfn, "r");
	321	my_assert_not(fhdr, NULL);
	322
	323	fsyms_from = fopen(argv[3], "r");
	324	my_assert_not(fsyms_from, NULL);
	325
	326	fsyms_to = fopen(argv[2], "r");
	327	my_assert_not(fsyms_to, NULL);
	328
	329	fout = fopen(argv[1], "w");
	330	my_assert_not(fout, NULL);
	331
	332	fprintf(fout, ".text\n\n");
	333	fprintf(fout, "# C -> asm\n\n");
	334
	335	while (fgets(line, sizeof(line), fsyms_to))
	336	{
	337	next_word(sym, sizeof(sym), line);
	338	if (sym[0] == 0 \|\| sym[0] == ';' \|\| sym[0] == '#')
	339	continue;
	340
	341	// IDA asm doesn't do '@' notation..
	342	strcpy(sym_noat, sym);
	343	p = strchr(sym_noat, '@');
	344	if (p != NULL)
	345	*p = 0;
	346
	347	pp = proto_parse(fhdr, sym_noat, 0);
	348	if (pp == NULL)
	349	goto out;
	350
	351	out_toasm_x86(fout, sym_noat, pp);
	352	}
	353
	354	fprintf(fout, "# asm -> C\n\n");
	355
	356	while (fgets(line, sizeof(line), fsyms_from))
	357	{
	358	next_word(sym, sizeof(sym), line);
	359	if (sym[0] == 0 \|\| sym[0] == ';' \|\| sym[0] == '#')
	360	continue;
	361
	362	pp = proto_parse(fhdr, sym, 0);
	363	if (pp == NULL)
	364	goto out;
	365
	366	out_fromasm_x86(fout, sym, pp);
	367	}
	368
	369	ret = 0;
	370	out:
	371	fclose(fout);
	372	fclose(fsyms_to);
	373	fclose(fsyms_from);
	374	fclose(fhdr);
	375	if (ret)
	376	remove(argv[1]);
	377
	378	return ret;
	379	}