1 /* macho2img.c - tool to convert Mach-O to raw imagw. */
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2009 Free Software Foundation, Inc.
6 * GRUB is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * GRUB is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
22 #include <grub/types.h>
23 #include <grub/macho.h>
28 /* Please don't internationalise this file. It's pointless. */
30 /* XXX: this file assumes particular Mach-O layout and does no checks. */
31 /* However as build system ensures correct usage of this tool this
32 shouldn't be a problem. */
35 main (int argc, char **argv)
41 struct grub_macho_header32 *head;
42 struct grub_macho_segment32 *curcmd;
44 unsigned bssstart = 0;
47 if (argc && strcmp (argv[1], "--bss") == 0)
49 if (argc < 2 + do_bss)
51 printf ("Usage: %s [--bss] filename.exec filename.img\n"
52 "Convert Mach-O into raw image\n", argv[0]);
55 in = fopen (argv[1 + do_bss], "rb");
58 printf ("Couldn't open %s\n", argv[1 + do_bss]);
61 out = fopen (argv[2 + do_bss], "wb");
65 printf ("Couldn't open %s\n", argv[2 + do_bss]);
68 fseek (in, 0, SEEK_END);
70 fseek (in, 0, SEEK_SET);
71 buf = malloc (bufsize);
76 printf ("Couldn't allocate buffer\n");
79 fread (buf, 1, bufsize, in);
80 head = (struct grub_macho_header32 *) buf;
81 if (grub_le_to_cpu32 (head->magic) != GRUB_MACHO_MAGIC32)
86 printf ("Invalid Mach-O file\n");
89 curcmd = (struct grub_macho_segment32 *) (buf + sizeof (*head));
90 for (i = 0; i < grub_le_to_cpu32 (head->ncmds); i++,
91 curcmd = (struct grub_macho_segment32 *)
92 (((char *) curcmd) + curcmd->cmdsize))
94 if (curcmd->cmd != GRUB_MACHO_CMD_SEGMENT32)
96 fwrite (buf + grub_le_to_cpu32 (curcmd->fileoff), 1,
97 grub_le_to_cpu32 (curcmd->filesize), out);
98 if (grub_le_to_cpu32 (curcmd->vmsize)
99 > grub_le_to_cpu32 (curcmd->filesize))
101 bssstart = grub_le_to_cpu32 (curcmd->vmaddr)
102 + grub_le_to_cpu32 (curcmd->filesize) ;
103 bssend = grub_le_to_cpu32 (curcmd->vmaddr)
104 + grub_le_to_cpu32 (curcmd->vmsize) ;
110 fseek (out, 0x5c, SEEK_SET);
111 tmp = grub_cpu_to_le32 (bssstart);
112 fwrite (&tmp, 4, 1, out);
113 tmp = grub_cpu_to_le32 (bssend);
114 fwrite (&tmp, 4, 1, out);
118 printf("macho2img complete\n");