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/*
* Copyright © 2018 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include "compiler/brw_eu.h"
#include "dev/gen_device_info.h"
/* Return size of file in bytes pointed by fp */
static size_t
i965_disasm_get_file_size(FILE *fp)
{
size_t size;
fseek(fp, 0L, SEEK_END);
size = ftell(fp);
fseek(fp, 0L, SEEK_SET);
return size;
}
static void *
i965_disasm_read_binary(FILE *fp, size_t *end)
{
size_t size;
void *assembly;
*end = i965_disasm_get_file_size(fp);
if (!*end)
return NULL;
assembly = malloc(*end + 1);
if (assembly == NULL)
return NULL;
size = fread(assembly, *end, 1, fp);
fclose(fp);
if (!size) {
free(assembly);
return NULL;
}
return assembly;
}
static struct gen_device_info *
i965_disasm_init(uint16_t pci_id)
{
struct gen_device_info *devinfo;
devinfo = malloc(sizeof *devinfo);
if (devinfo == NULL)
return NULL;
if (!gen_get_device_info_from_pci_id(pci_id, devinfo)) {
fprintf(stderr, "can't find device information: pci_id=0x%x\n",
pci_id);
exit(EXIT_FAILURE);
}
/* initialize compaction table in order to handle compacted instructions */
brw_init_compaction_tables(devinfo);
return devinfo;
}
static void
print_help(const char *progname, FILE *file)
{
fprintf(file,
"Usage: %s [OPTION]...\n"
"Disassemble i965 instructions from binary file.\n\n"
" --help display this help and exit\n"
" --binary-path=PATH read binary file from binary file PATH\n"
" --gen=platform disassemble instructions for given \n"
" platform (3 letter platform name)\n",
progname);
}
int main(int argc, char *argv[])
{
FILE *fp = NULL;
void *assembly = NULL;
char *binary_path = NULL;
size_t start = 0, end = 0;
uint16_t pci_id = 0;
int c, i;
struct gen_device_info *devinfo;
bool help = false;
const struct option i965_disasm_opts[] = {
{ "help", no_argument, (int *) &help, true },
{ "binary-path", required_argument, NULL, 'b' },
{ "gen", required_argument, NULL, 'g'},
{ NULL, 0, NULL, 0 }
};
i = 0;
while ((c = getopt_long(argc, argv, "", i965_disasm_opts, &i)) != -1) {
switch (c) {
case 'g': {
const int id = gen_device_name_to_pci_device_id(optarg);
if (id < 0) {
fprintf(stderr, "can't parse gen: '%s', expected 3 letter "
"platform name\n", optarg);
/* Clean up binary path if given pci id is wrong */
if (binary_path) {
free(binary_path);
fclose(fp);
}
exit(EXIT_FAILURE);
} else {
pci_id = id;
}
break;
}
case 'b':
binary_path = strdup(optarg);
fp = fopen(binary_path, "rb");
if (!fp) {
fprintf(stderr, "Unable to read input binary file : %s\n",
binary_path);
/* free binary_path if path is wrong */
free(binary_path);
exit(EXIT_FAILURE);
}
break;
default:
/* Clean up binary path if given option is wrong */
if (binary_path) {
free(binary_path);
fclose(fp);
}
break;
}
}
if (help || !binary_path || !pci_id) {
print_help(argv[0], stderr);
exit(0);
}
devinfo = i965_disasm_init(pci_id);
if (!devinfo) {
fprintf(stderr, "Unable to allocate memory for "
"gen_device_info struct instance.\n");
exit(EXIT_FAILURE);
}
assembly = i965_disasm_read_binary(fp, &end);
if (!assembly) {
if (end)
fprintf(stderr, "Unable to allocate buffer to read binary file\n");
else
fprintf(stderr, "Input file is empty\n");
exit(EXIT_FAILURE);
}
/* Disassemble i965 instructions from buffer assembly */
brw_disassemble(devinfo, assembly, start, end, stdout);
free(binary_path);
free(assembly);
free(devinfo);
return EXIT_SUCCESS;
}
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