| /* |
| * Copyright 2012 Google Inc. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but without any warranty; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <libpayload.h> |
| #include <lzma.h> |
| |
| #include "base/elf.h" |
| #include "image/enter_trampoline.h" |
| #include "image/startrw.h" |
| #include "image/symbols.h" |
| |
| int start_rw_firmware(const void *compressed_image, uint32_t size) |
| { |
| // Put the decompressed RW ELF at the end of the trampoline. |
| void *elf_image = &_tramp_end; |
| |
| // Decompress the RW image. |
| uint32_t out_size = ulzman(compressed_image, size, elf_image, |
| &_kernel_end - &_tramp_end); |
| if (!out_size) { |
| printf("Error decompressing RW firmware.\n"); |
| return -1; |
| } |
| |
| // Check that it's a reasonable ELF image. |
| unsigned char *e_ident = elf_image; |
| if (e_ident[0] != ElfMag0Val || e_ident[1] != ElfMag1Val || |
| e_ident[2] != ElfMag2Val || e_ident[3] != ElfMag3Val) { |
| printf("Bad ELF magic value in RW firmware.\n"); |
| return -1; |
| } |
| if (e_ident[EI_Class] != ElfClass32) { |
| printf("Only loading of 32 bit RW firmware is supported.\n"); |
| return -1; |
| } |
| |
| enter_trampoline((Elf32_Ehdr *)elf_image); |
| |
| // We should never actually reach the end of this function. |
| return 0; |
| } |