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// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2012-2013 Intel Corporation
*
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <getopt.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/stat.h>
#include <sys/mman.h>
static void print_cmd(uint16_t opcode, const uint8_t *buf, uint8_t plen)
{
switch (opcode) {
case 0xfc4c:
printf(" Write_RAM [address=0x%08x]",
buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
break;
case 0xfc4e:
printf(" Launch_RAM [address=0x%08x]",
buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
break;
}
}
static void analyze_memory(const uint8_t *buf, size_t len)
{
const uint8_t *ptr = buf;
while (len >= 3) {
uint16_t opcode = ptr[0] | ptr[1] << 8;
uint8_t plen = ptr[2];
ptr += 3;
len -= 3;
if (len < plen) {
fprintf(stderr, "Corrupted file\n");
break;
}
printf("opcode=0x%04x plen=%-3u", opcode, plen);
print_cmd(opcode, ptr + 3, plen);
printf("\n");
ptr += plen;
len -= plen;
}
}
static void analyze_file(const char *pathname)
{
struct stat st;
void *map;
int fd;
printf("Analyzing %s\n", pathname);
fd = open(pathname, O_RDONLY | O_CLOEXEC);
if (fd < 0) {
perror("Failed to open file");
return;
}
if (fstat(fd, &st) < 0) {
fprintf(stderr, "Failed get file size\n");
close(fd);
return;
}
if (st.st_size == 0) {
fprintf(stderr, "Empty file\n");
close(fd);
return;
}
map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (!map || map == MAP_FAILED) {
fprintf(stderr, "Failed to map file\n");
close(fd);
return;
}
analyze_memory(map, st.st_size);
munmap(map, st.st_size);
close(fd);
}
static void usage(void)
{
printf("Broadcom Bluetooth firmware analyzer\n"
"Usage:\n");
printf("\tbcmfw [options] <file>\n");
printf("Options:\n"
"\t-h, --help Show help options\n");
}
static const struct option main_options[] = {
{ "version", no_argument, NULL, 'v' },
{ "help", no_argument, NULL, 'h' },
{ }
};
int main(int argc, char *argv[])
{
int i;
for (;;) {
int opt;
opt = getopt_long(argc, argv, "vh", main_options, NULL);
if (opt < 0)
break;
switch (opt) {
case 'v':
printf("%s\n", VERSION);
return EXIT_SUCCESS;
case 'h':
usage();
return EXIT_SUCCESS;
default:
return EXIT_FAILURE;
}
}
if (argc - optind < 1) {
fprintf(stderr, "No input firmware files provided\n");
return EXIT_FAILURE;
}
for (i = optind; i < argc; i++)
analyze_file(argv[i]);
return EXIT_SUCCESS;
}
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