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/*
* Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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.
*
*/
#include <common.h>
#include <init.h>
#include <elf.h>
#include <linux/sizes.h>
#include <asm/system_info.h>
#include <asm/barebox-arm.h>
#include <asm/barebox-arm-head.h>
#include <asm-generic/memory_layout.h>
#include <asm/sections.h>
#include <asm/cache.h>
#include <debug_ll.h>
#define R_ARM_RELATIVE 23
#define R_AARCH64_RELATIVE 1027
/*
* relocate binary to the currently running address
*/
void relocate_to_current_adr(void)
{
unsigned long offset, offset_var;
unsigned long __maybe_unused *dynsym, *dynend;
void *dstart, *dend;
/* Get offset between linked address and runtime address */
offset = get_runtime_offset();
offset_var = global_variable_offset();
dstart = (void *)__rel_dyn_start + offset_var;
dend = (void *)__rel_dyn_end + offset_var;
#if defined(CONFIG_CPU_64)
while (dstart < dend) {
struct elf64_rela *rel = dstart;
if (ELF64_R_TYPE(rel->r_info) == R_AARCH64_RELATIVE) {
unsigned long *fixup = (unsigned long *)(rel->r_offset + offset);
*fixup = rel->r_addend + offset;
} else {
putc_ll('>');
puthex_ll(rel->r_info);
putc_ll(' ');
puthex_ll(rel->r_offset);
putc_ll(' ');
puthex_ll(rel->r_addend);
putc_ll('\n');
panic("");
}
dstart += sizeof(*rel);
}
#elif defined(CONFIG_CPU_32)
dynsym = (void *)__dynsym_start + offset_var;
dynend = (void *)__dynsym_end + offset_var;
while (dstart < dend) {
struct elf32_rel *rel = dstart;
if (ELF32_R_TYPE(rel->r_info) == R_ARM_RELATIVE) {
unsigned long *fixup = (unsigned long *)(rel->r_offset + offset);
*fixup = *fixup + offset;
rel->r_offset += offset;
} else if (ELF32_R_TYPE(rel->r_info) == R_ARM_ABS32) {
unsigned long r = dynsym[ELF32_R_SYM(rel->r_info) * 4 + 1];
unsigned long *fixup = (unsigned long *)(rel->r_offset + offset);
*fixup = *fixup + r + offset;
} else {
putc_ll('>');
puthex_ll(rel->r_info);
putc_ll(' ');
puthex_ll(rel->r_offset);
putc_ll('\n');
panic("");
}
dstart += sizeof(*rel);
}
memset(dynsym, 0, (unsigned long)dynend - (unsigned long)dynsym);
#else
#error "Architecture not specified"
#endif
arm_early_mmu_cache_flush();
icache_invalidate();
}
#ifdef ARM_MULTIARCH
int __cpu_architecture;
int __pure cpu_architecture(void)
{
if(__cpu_architecture == CPU_ARCH_UNKNOWN)
__cpu_architecture = arm_early_get_cpu_architecture();
return __cpu_architecture;
}
#endif
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