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/*
* kexec-elf-rel-sh.c - ELF relocations for SuperH
* Copyright (C) 2008 Paul Mundt
*
* Based on the SHcompact module loader (arch/sh/kernel/module.c) in the
* Linux kernel, which is written by:
*
* Copyright (C) 2003 - 2008 Kaz Kojima & Paul Mundt
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#include <stdio.h>
#include <elf.h>
#include "../../kexec.h"
#include "../../kexec-elf.h"
int machine_verify_elf_rel(struct mem_ehdr *ehdr)
{
/* Intentionally don't bother with endianness validation, it's
* configurable */
if (ehdr->ei_class != ELFCLASS32)
return 0;
if (ehdr->e_machine != EM_SH)
return 0;
return 1;
}
void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
struct mem_sym *UNUSED(sym), unsigned long r_type, void *orig_loc,
unsigned long UNUSED(address), unsigned long relocation)
{
uint32_t *location = orig_loc;
uint32_t value;
switch (r_type) {
case R_SH_DIR32:
value = get_unaligned(location);
value += relocation;
put_unaligned(value, location);
break;
case R_SH_REL32:
relocation = (relocation - (uint32_t)location);
value = get_unaligned(location);
value += relocation;
put_unaligned(value, location);
break;
default:
die("Unknown rela relocation: %lu\n", r_type);
break;
}
}
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