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/*
* 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.
*/
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>
#include <string.h>
#include <limits.h>
#include <stdlib.h>
#include <getopt.h>
#include "../../kexec.h"
#include "../../kexec-elf.h"
#include "../../kexec-syscall.h"
#include "../../firmware_memmap.h"
#include "kexec-x86.h"
#include "crashdump-x86.h"
#include <arch/options.h>
struct file_type file_type[] = {
{ "multiboot-x86", multiboot_x86_probe, multiboot_x86_load,
multiboot_x86_usage },
{ "multiboot2-x86", multiboot2_x86_probe, multiboot2_x86_load,
multiboot2_x86_usage },
{ "elf-x86", elf_x86_probe, elf_x86_load, elf_x86_usage },
{ "bzImage", bzImage_probe, bzImage_load, bzImage_usage },
{ "beoboot-x86", beoboot_probe, beoboot_load, beoboot_usage },
{ "nbi-x86", nbi_probe, nbi_load, nbi_usage },
};
int file_types = sizeof(file_type)/sizeof(file_type[0]);
void arch_usage(void)
{
printf(
" --reset-vga Attempt to reset a standard vga device\n"
" --serial=<port> Specify the serial port for debug output\n"
" --serial-baud=<baud_rate> Specify the serial port baud rate\n"
" --console-vga Enable the vga console\n"
" --console-serial Enable the serial console\n"
" --elf32-core-headers Prepare core headers in ELF32 format\n"
" --elf64-core-headers Prepare core headers in ELF64 format\n"
" --pass-memmap-cmdline Pass memory map via command line in kexec on panic case\n"
" --noefi Disable efi support\n"
);
}
struct arch_options_t arch_options = {
.reset_vga = 0,
.serial_base = 0x3f8,
.serial_baud = 0,
.console_vga = 0,
.console_serial = 0,
.core_header_type = CORE_TYPE_UNDEF,
.pass_memmap_cmdline = 0,
.noefi = 0,
};
int arch_process_options(int argc, char **argv)
{
static const struct option options[] = {
KEXEC_ALL_OPTIONS
{ 0, 0, NULL, 0 },
};
static const char short_options[] = KEXEC_ALL_OPT_STR;
int opt;
unsigned long value;
char *end;
opterr = 0; /* Don't complain about unrecognized options here */
while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
switch(opt) {
default:
break;
case OPT_RESET_VGA:
arch_options.reset_vga = 1;
break;
case OPT_CONSOLE_VGA:
arch_options.console_vga = 1;
break;
case OPT_CONSOLE_SERIAL:
arch_options.console_serial = 1;
break;
case OPT_SERIAL:
value = ULONG_MAX;
if (strcmp(optarg, "ttyS0") == 0) {
value = 0x3f8;
}
else if (strcmp(optarg, "ttyS1") == 0) {
value = 0x2f8;
}
else if (strncmp(optarg, "0x", 2) == 0) {
value = strtoul(optarg +2, &end, 16);
if (*end != '\0') {
value = ULONG_MAX;
}
}
if (value >= 65536) {
fprintf(stderr, "Bad serial port base '%s'\n",
optarg);
usage();
return -1;
}
arch_options.serial_base = value;
break;
case OPT_SERIAL_BAUD:
value = strtoul(optarg, &end, 0);
if ((value > 115200) || ((115200 %value) != 0) ||
(value < 9600) || (*end))
{
fprintf(stderr, "Bad serial port baud rate '%s'\n",
optarg);
usage();
return -1;
}
arch_options.serial_baud = value;
break;
case OPT_ELF32_CORE:
arch_options.core_header_type = CORE_TYPE_ELF32;
break;
case OPT_ELF64_CORE:
arch_options.core_header_type = CORE_TYPE_ELF64;
break;
case OPT_PASS_MEMMAP_CMDLINE:
arch_options.pass_memmap_cmdline = 1;
break;
case OPT_NOEFI:
arch_options.noefi = 1;
break;
}
}
/* Reset getopt for the next pass; called in other source modules */
opterr = 1;
optind = 1;
return 0;
}
const struct arch_map_entry arches[] = {
/* For compatibility with older patches
* use KEXEC_ARCH_DEFAULT instead of KEXEC_ARCH_386 here.
*/
{ "i386", KEXEC_ARCH_DEFAULT },
{ "i486", KEXEC_ARCH_DEFAULT },
{ "i586", KEXEC_ARCH_DEFAULT },
{ "i686", KEXEC_ARCH_DEFAULT },
{ "x86_64", KEXEC_ARCH_X86_64 },
{ 0, 0 },
};
int arch_compat_trampoline(struct kexec_info *info)
{
if ((info->kexec_flags & KEXEC_ARCH_MASK) == KEXEC_ARCH_X86_64)
{
if (!info->rhdr.e_shdr) {
fprintf(stderr,
"A trampoline is required for cross architecture support\n");
return -1;
}
elf_rel_set_symbol(&info->rhdr, "compat_x86_64_entry32",
&info->entry, sizeof(info->entry));
info->entry = (void *)elf_rel_get_addr(&info->rhdr, "compat_x86_64");
}
return 0;
}
void arch_update_purgatory(struct kexec_info *info)
{
uint8_t panic_kernel = 0;
elf_rel_set_symbol(&info->rhdr, "reset_vga",
&arch_options.reset_vga, sizeof(arch_options.reset_vga));
elf_rel_set_symbol(&info->rhdr, "serial_base",
&arch_options.serial_base, sizeof(arch_options.serial_base));
elf_rel_set_symbol(&info->rhdr, "serial_baud",
&arch_options.serial_baud, sizeof(arch_options.serial_baud));
elf_rel_set_symbol(&info->rhdr, "console_vga",
&arch_options.console_vga, sizeof(arch_options.console_vga));
elf_rel_set_symbol(&info->rhdr, "console_serial",
&arch_options.console_serial, sizeof(arch_options.console_serial));
elf_rel_set_symbol(&info->rhdr, "backup_src_start",
&info->backup_src_start, sizeof(info->backup_src_start));
elf_rel_set_symbol(&info->rhdr, "backup_src_size",
&info->backup_src_size, sizeof(info->backup_src_size));
if (info->kexec_flags & KEXEC_ON_CRASH) {
panic_kernel = 1;
elf_rel_set_symbol(&info->rhdr, "backup_start",
&info->backup_start, sizeof(info->backup_start));
}
elf_rel_set_symbol(&info->rhdr, "panic_kernel",
&panic_kernel, sizeof(panic_kernel));
}
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