Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
2.3 kB · 96 lines
C
at master
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697// 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;}