| /* |
| * kexec: Linux boots Linux |
| * |
| * Copyright (C) 2003-2005 Eric Biederman (ebiederm@xmission.com) |
| * |
| * 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 (version 2 of the License). |
| * |
| * 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #define _GNU_SOURCE |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <elf.h> |
| #include <boot/elf_boot.h> |
| #include <ip_checksum.h> |
| #include <x86/x86-linux.h> |
| #include "kexec.h" |
| #include "kexec-elf.h" |
| #include "kexec-elf-boot.h" |
| |
| |
| #define UPSZ(X) _ALIGN_UP(sizeof(X), 4) |
| |
| static struct boot_notes { |
| Elf_Bhdr hdr; |
| Elf_Nhdr bl_hdr; |
| unsigned char bl_desc[UPSZ(BOOTLOADER)]; |
| Elf_Nhdr blv_hdr; |
| unsigned char blv_desc[UPSZ(BOOTLOADER_VERSION)]; |
| Elf_Nhdr cmd_hdr; |
| unsigned char command_line[0]; |
| } boot_notes = { |
| .hdr = { |
| .b_signature = ELF_BOOT_MAGIC, |
| .b_size = sizeof(boot_notes), |
| .b_checksum = 0, |
| .b_records = 3, |
| }, |
| .bl_hdr = { |
| .n_namesz = 0, |
| .n_descsz = sizeof(BOOTLOADER), |
| .n_type = EBN_BOOTLOADER_NAME, |
| }, |
| .bl_desc = BOOTLOADER, |
| .blv_hdr = { |
| .n_namesz = 0, |
| .n_descsz = sizeof(BOOTLOADER_VERSION), |
| .n_type = EBN_BOOTLOADER_VERSION, |
| }, |
| .blv_desc = BOOTLOADER_VERSION, |
| .cmd_hdr = { |
| .n_namesz = 0, |
| .n_descsz = 0, |
| .n_type = EBN_COMMAND_LINE, |
| }, |
| }; |
| |
| unsigned long elf_boot_notes( |
| struct kexec_info *info, unsigned long max_addr, |
| const char *cmdline, int cmdline_len) |
| { |
| unsigned long note_bytes; |
| unsigned long note_base; |
| struct boot_notes *notes; |
| note_bytes = sizeof(*notes) + _ALIGN(cmdline_len, 4); |
| notes = xmalloc(note_bytes); |
| memcpy(notes, &boot_notes, sizeof(boot_notes)); |
| memcpy(notes->command_line, cmdline, cmdline_len); |
| notes->hdr.b_size = note_bytes; |
| notes->cmd_hdr.n_descsz = cmdline_len; |
| notes->hdr.b_checksum = compute_ip_checksum(notes, note_bytes); |
| |
| note_base = add_buffer(info, notes, note_bytes, note_bytes, |
| 4, 0, max_addr, 1); |
| |
| return note_base; |
| } |