1 /*
2 * Copyright © 2007 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 *
26 */
27
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <stdarg.h>
32 #include <sys/stat.h>
33 #include <fcntl.h>
34 #include <unistd.h>
35 #include <errno.h>
36 #include <pciaccess.h>
37 #include <err.h>
38
39 #ifndef DEFFILEMODE
40 #define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) /* 0666 */
41 #endif
42
usage(void)43 static void __attribute__((noreturn)) usage(void)
44 {
45 fprintf(stderr, "usage: bios_dumper <filename>\n");
46 exit(1);
47 }
48
main(int argc,char ** argv)49 int main(int argc, char **argv)
50 {
51 struct pci_device *dev;
52 void *bios;
53 int error, fd;
54
55 if (argc != 2)
56 usage();
57
58 error = pci_system_init();
59 if (error != 0) {
60 fprintf(stderr, "Couldn't initialize PCI system: %s\n",
61 strerror(error));
62 exit(1);
63 }
64
65 /* Grab the graphics card */
66 dev = pci_device_find_by_slot(0, 0, 2, 0);
67 if (dev == NULL)
68 errx(1, "Couldn't find graphics card");
69
70 error = pci_device_probe(dev);
71 if (error != 0) {
72 fprintf(stderr, "Couldn't probe graphics card: %s\n",
73 strerror(error));
74 exit(1);
75 }
76
77 if (dev->vendor_id != 0x8086)
78 errx(1, "Graphics card is non-intel");
79
80 /* Some versions of libpciaccess correct this automatically, but some
81 * don't. */
82 if (dev->rom_size == 0)
83 dev->rom_size = 64 * 1024;
84
85 bios = malloc(dev->rom_size);
86 if (bios == NULL)
87 errx(1, "Couldn't allocate memory for BIOS data\n");
88
89 error = pci_device_read_rom(dev, bios);
90 if (error != 0) {
91 fprintf(stderr, "Couldn't read graphics card ROM: %s\n",
92 strerror(error));
93 exit(1);
94 }
95
96 fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC, DEFFILEMODE);
97 if (fd < 0) {
98 fprintf(stderr, "Couldn't open output: %s\n", strerror(errno));
99 exit(1);
100 }
101
102 if (write(fd, bios, dev->rom_size) < dev->rom_size) {
103 fprintf(stderr, "Couldn't write BIOS data: %s\n",
104 strerror(errno));
105 exit(1);
106 }
107
108 close(fd);
109 pci_system_cleanup();
110
111 return 0;
112 }
113