diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/module.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/kernel/module.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/module.c b/ANDROID_3.4.5/arch/x86/kernel/module.c deleted file mode 100644 index f21fd94a..00000000 --- a/ANDROID_3.4.5/arch/x86/kernel/module.c +++ /dev/null @@ -1,205 +0,0 @@ -/* Kernel module help for x86. - Copyright (C) 2001 Rusty Russell. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - 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. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -*/ -#include <linux/moduleloader.h> -#include <linux/elf.h> -#include <linux/vmalloc.h> -#include <linux/fs.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/bug.h> -#include <linux/mm.h> -#include <linux/gfp.h> -#include <linux/jump_label.h> - -#include <asm/page.h> -#include <asm/pgtable.h> - -#if 0 -#define DEBUGP printk -#else -#define DEBUGP(fmt...) -#endif - -void *module_alloc(unsigned long size) -{ - if (PAGE_ALIGN(size) > MODULES_LEN) - return NULL; - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL_EXEC, - -1, __builtin_return_address(0)); -} - -#ifdef CONFIG_X86_32 -int apply_relocate(Elf32_Shdr *sechdrs, - const char *strtab, - unsigned int symindex, - unsigned int relsec, - struct module *me) -{ - unsigned int i; - Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr; - Elf32_Sym *sym; - uint32_t *location; - - DEBUGP("Applying relocate section %u to %u\n", relsec, - sechdrs[relsec].sh_info); - for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { - /* This is where to make the change */ - location = (void *)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 - + ELF32_R_SYM(rel[i].r_info); - - switch (ELF32_R_TYPE(rel[i].r_info)) { - case R_386_32: - /* We add the value into the location given */ - *location += sym->st_value; - break; - case R_386_PC32: - /* Add the value, subtract its postition */ - *location += sym->st_value - (uint32_t)location; - break; - default: - printk(KERN_ERR "module %s: Unknown relocation: %u\n", - me->name, ELF32_R_TYPE(rel[i].r_info)); - return -ENOEXEC; - } - } - return 0; -} -#else /*X86_64*/ -int apply_relocate_add(Elf64_Shdr *sechdrs, - const char *strtab, - unsigned int symindex, - unsigned int relsec, - struct module *me) -{ - unsigned int i; - Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr; - Elf64_Sym *sym; - void *loc; - u64 val; - - DEBUGP("Applying relocate section %u to %u\n", relsec, - sechdrs[relsec].sh_info); - for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { - /* This is where to make the change */ - loc = (void *)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 = (Elf64_Sym *)sechdrs[symindex].sh_addr - + ELF64_R_SYM(rel[i].r_info); - - DEBUGP("type %d st_value %Lx r_addend %Lx loc %Lx\n", - (int)ELF64_R_TYPE(rel[i].r_info), - sym->st_value, rel[i].r_addend, (u64)loc); - - val = sym->st_value + rel[i].r_addend; - - switch (ELF64_R_TYPE(rel[i].r_info)) { - case R_X86_64_NONE: - break; - case R_X86_64_64: - *(u64 *)loc = val; - break; - case R_X86_64_32: - *(u32 *)loc = val; - if (val != *(u32 *)loc) - goto overflow; - break; - case R_X86_64_32S: - *(s32 *)loc = val; - if ((s64)val != *(s32 *)loc) - goto overflow; - break; - case R_X86_64_PC32: - val -= (u64)loc; - *(u32 *)loc = val; -#if 0 - if ((s64)val != *(s32 *)loc) - goto overflow; -#endif - break; - default: - printk(KERN_ERR "module %s: Unknown rela relocation: %llu\n", - me->name, ELF64_R_TYPE(rel[i].r_info)); - return -ENOEXEC; - } - } - return 0; - -overflow: - printk(KERN_ERR "overflow in relocation type %d val %Lx\n", - (int)ELF64_R_TYPE(rel[i].r_info), val); - printk(KERN_ERR "`%s' likely not compiled with -mcmodel=kernel\n", - me->name); - return -ENOEXEC; -} -#endif - -int module_finalize(const Elf_Ehdr *hdr, - const Elf_Shdr *sechdrs, - struct module *me) -{ - const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL, - *para = NULL; - char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; - - for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { - if (!strcmp(".text", secstrings + s->sh_name)) - text = s; - if (!strcmp(".altinstructions", secstrings + s->sh_name)) - alt = s; - if (!strcmp(".smp_locks", secstrings + s->sh_name)) - locks = s; - if (!strcmp(".parainstructions", secstrings + s->sh_name)) - para = s; - } - - if (alt) { - /* patch .altinstructions */ - void *aseg = (void *)alt->sh_addr; - apply_alternatives(aseg, aseg + alt->sh_size); - } - if (locks && text) { - void *lseg = (void *)locks->sh_addr; - void *tseg = (void *)text->sh_addr; - alternatives_smp_module_add(me, me->name, - lseg, lseg + locks->sh_size, - tseg, tseg + text->sh_size); - } - - if (para) { - void *pseg = (void *)para->sh_addr; - apply_paravirt(pseg, pseg + para->sh_size); - } - - /* make jump label nops */ - jump_label_apply_nops(me); - - return 0; -} - -void module_arch_cleanup(struct module *mod) -{ - alternatives_smp_module_del(mod); -} |