From a769094061289453e8c331d7746e0e26f5d1e38b Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Fri, 26 Jun 2009 00:49:51 +0000 Subject: [PATCH] Blackfin: fix module reloc handling for all memory regions The current module relocation code has spotty handling wrt different memory regions (like L1 instruction). Rather than try to fix each little spot, use the new common memory functions to greatly simplify everything and make sure it is always correct. Signed-off-by: Mike Frysinger --- arch/blackfin/kernel/module.c | 62 +++++++++++++++++++---------------- 1 file changed, 34 insertions(+), 28 deletions(-) diff --git a/arch/blackfin/kernel/module.c b/arch/blackfin/kernel/module.c index 2ad805e67afc..67fc7a56c865 100644 --- a/arch/blackfin/kernel/module.c +++ b/arch/blackfin/kernel/module.c @@ -37,6 +37,7 @@ #include #include #include +#include void *module_alloc(unsigned long size) { @@ -199,26 +200,23 @@ apply_relocate(Elf_Shdr * sechdrs, const char *strtab, /* gas does not generate it. */ /*************************************************************************/ int -apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab, +apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relsec, struct module *mod) { unsigned int i; - unsigned short tmp; Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; Elf32_Sym *sym; - uint32_t *location32; - uint16_t *location16; - uint32_t value; + unsigned long location, value, size; pr_debug("applying relocate section %u to %u\n", mod->name, relsec, sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { /* This is where to make the change */ - location16 = - (uint16_t *) (sechdrs[sechdrs[relsec].sh_info].sh_addr + - rel[i].r_offset); - location32 = (uint32_t *) location16; + location = sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + /* This is the symbol it is referring to. Note that all undefined symbols have been resolved. */ sym = (Elf32_Sym *) sechdrs[symindex].sh_addr @@ -227,39 +225,28 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab, value += rel[i].r_addend; #ifdef CONFIG_SMP - if ((unsigned long)location16 >= COREB_L1_DATA_A_START) { + if (location >= COREB_L1_DATA_A_START) { pr_err("cannot relocate in L1: %u (SMP kernel)", mod->name, ELF32_R_TYPE(rel[i].r_info)); return -ENOEXEC; } #endif - pr_debug("location is %lx, value is %x type is %d\n", - mod->name, (unsigned long)location32, value, - ELF32_R_TYPE(rel[i].r_info)); + pr_debug("location is %lx, value is %lx type is %d\n", + mod->name, location, value, ELF32_R_TYPE(rel[i].r_info)); switch (ELF32_R_TYPE(rel[i].r_info)) { - case R_BFIN_LUIMM16: - tmp = (value & 0xffff); - if ((unsigned long)location16 >= L1_CODE_START) { - dma_memcpy(location16, &tmp, 2); - } else - *location16 = tmp; - break; case R_BFIN_HUIMM16: - tmp = ((value >> 16) & 0xffff); - if ((unsigned long)location16 >= L1_CODE_START) { - dma_memcpy(location16, &tmp, 2); - } else - *location16 = tmp; - break; + value >>= 16; + case R_BFIN_LUIMM16: case R_BFIN_RIMM16: - *location16 = (value & 0xffff); + size = 2; break; case R_BFIN_BYTE4_DATA: - *location32 = value; + size = 4; break; + case R_BFIN_PCREL24: case R_BFIN_PCREL24_JUMP_L: case R_BFIN_PCREL12_JUMP: @@ -268,12 +255,31 @@ apply_relocate_add(Elf_Shdr * sechdrs, const char *strtab, pr_err("unsupported relocation: %u (no -mlong-calls?)\n", mod->name, ELF32_R_TYPE(rel[i].r_info)); return -ENOEXEC; + default: pr_err("unknown relocation: %u\n", mod->name, ELF32_R_TYPE(rel[i].r_info)); return -ENOEXEC; } + + switch (bfin_mem_access_type(location, size)) { + case BFIN_MEM_ACCESS_CORE: + case BFIN_MEM_ACCESS_CORE_ONLY: + memcpy((void *)location, &value, size); + break; + case BFIN_MEM_ACCESS_DMA: + dma_memcpy((void *)location, &value, size); + break; + case BFIN_MEM_ACCESS_ITEST: + isram_memcpy((void *)location, &value, size); + break; + default: + pr_err("invalid relocation for %#lx\n", + mod->name, location); + return -ENOEXEC; + } } + return 0; } -- 2.39.2