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/*
* kexec/arch/s390/crashdump-s390.c
*
* Copyright IBM Corp. 2011
*
* Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
*/
#ifdef __s390x__
#define _GNU_SOURCE
#include <stdio.h>
#include <elf.h>
#include <limits.h>
#include <string.h>
#include "../../kexec.h"
#include "../../kexec-syscall.h"
#include "../../kexec/crashdump.h"
#include "kexec-s390.h"
/*
* Create ELF core header
*/
static int create_elf_header(struct kexec_info *info, unsigned long crash_base,
unsigned long crash_end)
{
#ifdef WITH_ELF_HEADER
static struct memory_range crash_memory_range[MAX_MEMORY_RANGES];
unsigned long elfcorehdr, elfcorehdr_size, bufsz;
struct crash_elf_info elf_info;
char str[COMMAND_LINESIZE];
int ranges;
void *tmp;
memset(&elf_info, 0, sizeof(elf_info));
elf_info.data = ELFDATA2MSB;
elf_info.machine = EM_S390;
elf_info.class = ELFCLASS64;
elf_info.get_note_info = get_crash_notes_per_cpu;
if (get_memory_ranges_s390(crash_memory_range, &ranges, 0))
return -1;
if (crash_create_elf64_headers(info, &elf_info, crash_memory_range,
ranges, &tmp, &bufsz,
ELF_CORE_HEADER_ALIGN))
return -1;
elfcorehdr = add_buffer(info, tmp, bufsz, bufsz, 1024,
crash_base, crash_end, -1);
elfcorehdr_size = bufsz;
snprintf(str, sizeof(str), " elfcorehdr=%ld@%ldK\n",
elfcorehdr_size, elfcorehdr / 1024);
if (command_line_add(info, str))
return -1;
#endif
return 0;
}
/*
* Load additional segments for kdump kernel
*/
int load_crashdump_segments(struct kexec_info *info, unsigned long crash_base,
unsigned long crash_end)
{
unsigned long crash_size = crash_size = crash_end - crash_base + 1;
if (create_elf_header(info, crash_base, crash_end))
return -1;
elf_rel_build_load(info, &info->rhdr, (const char *) purgatory,
purgatory_size, crash_base + 0x2000,
crash_base + 0x10000, -1, 0);
elf_rel_set_symbol(&info->rhdr, "crash_base", &crash_base,
sizeof(crash_base));
elf_rel_set_symbol(&info->rhdr, "crash_size", &crash_size,
sizeof(crash_size));
info->entry = (void *) elf_rel_get_addr(&info->rhdr, "purgatory_start");
return 0;
}
#else
/*
* kdump is not available for s390
*/
int load_crashdump_segments(struct kexec_info *info, unsigned long crash_base,
unsigned long crash_end)
{
return -1;
}
#endif
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