1 files changed, 89 insertions, 0 deletions
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 <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;
+}