From eba0cfa6b0bef4f2e73c8630a7efa3944df8b0f8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 04:56:35 +0200 Subject: Adding upstream version 1:2.0.27. Signed-off-by: Daniel Baumann --- kexec/kexec-elf-boot.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 kexec/kexec-elf-boot.c (limited to 'kexec/kexec-elf-boot.c') diff --git a/kexec/kexec-elf-boot.c b/kexec/kexec-elf-boot.c new file mode 100644 index 0000000..38f9056 --- /dev/null +++ b/kexec/kexec-elf-boot.c @@ -0,0 +1,89 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#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; +} -- cgit v1.2.3