mirror of https://gitee.com/openkylin/linux.git
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2007-2009 PetaLogix
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/moduleloader.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/string.h>
|
|
#include <linux/pgtable.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
|
|
int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
|
|
unsigned int symindex, unsigned int relsec, struct module *module)
|
|
{
|
|
|
|
unsigned int i;
|
|
Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
|
|
Elf32_Sym *sym;
|
|
unsigned long int *location;
|
|
unsigned long int value;
|
|
|
|
pr_debug("Applying add relocation section %u to %u\n",
|
|
relsec, sechdrs[relsec].sh_info);
|
|
|
|
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
|
|
|
|
location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr +
|
|
rela[i].r_offset;
|
|
sym = (Elf32_Sym *)sechdrs[symindex].sh_addr +
|
|
ELF32_R_SYM(rela[i].r_info);
|
|
value = sym->st_value + rela[i].r_addend;
|
|
|
|
switch (ELF32_R_TYPE(rela[i].r_info)) {
|
|
|
|
/*
|
|
* Be careful! mb-gcc / mb-ld splits the relocs between the
|
|
* text and the reloc table. In general this means we must
|
|
* read the current contents of (*location), add any offset
|
|
* then store the result back in
|
|
*/
|
|
|
|
case R_MICROBLAZE_32:
|
|
*location = value;
|
|
break;
|
|
|
|
case R_MICROBLAZE_64:
|
|
location[0] = (location[0] & 0xFFFF0000) |
|
|
(value >> 16);
|
|
location[1] = (location[1] & 0xFFFF0000) |
|
|
(value & 0xFFFF);
|
|
break;
|
|
|
|
case R_MICROBLAZE_64_PCREL:
|
|
value -= (unsigned long int)(location) + 4;
|
|
location[0] = (location[0] & 0xFFFF0000) |
|
|
(value >> 16);
|
|
location[1] = (location[1] & 0xFFFF0000) |
|
|
(value & 0xFFFF);
|
|
pr_debug("R_MICROBLAZE_64_PCREL (%08lx)\n",
|
|
value);
|
|
break;
|
|
|
|
case R_MICROBLAZE_32_PCREL_LO:
|
|
pr_debug("R_MICROBLAZE_32_PCREL_LO\n");
|
|
break;
|
|
|
|
case R_MICROBLAZE_64_NONE:
|
|
pr_debug("R_MICROBLAZE_64_NONE\n");
|
|
break;
|
|
|
|
case R_MICROBLAZE_NONE:
|
|
pr_debug("R_MICROBLAZE_NONE\n");
|
|
break;
|
|
|
|
default:
|
|
pr_err("module %s: Unknown relocation: %u\n",
|
|
module->name,
|
|
ELF32_R_TYPE(rela[i].r_info));
|
|
return -ENOEXEC;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
|
|
struct module *module)
|
|
{
|
|
flush_dcache();
|
|
return 0;
|
|
}
|