diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/kernel/module.c')
-rw-r--r-- | ANDROID_3.4.5/arch/arm/kernel/module.c | 344 |
1 files changed, 0 insertions, 344 deletions
diff --git a/ANDROID_3.4.5/arch/arm/kernel/module.c b/ANDROID_3.4.5/arch/arm/kernel/module.c deleted file mode 100644 index 1e9be5d2..00000000 --- a/ANDROID_3.4.5/arch/arm/kernel/module.c +++ /dev/null @@ -1,344 +0,0 @@ -/* - * linux/arch/arm/kernel/module.c - * - * Copyright (C) 2002 Russell King. - * Modified for nommu by Hyok S. Choi - * - * 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. - * - * Module allocation method suggested by Andi Kleen. - */ -#include <linux/module.h> -#include <linux/moduleloader.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/elf.h> -#include <linux/vmalloc.h> -#include <linux/fs.h> -#include <linux/string.h> -#include <linux/gfp.h> - -#include <asm/pgtable.h> -#include <asm/sections.h> -#include <asm/smp_plat.h> -#include <asm/unwind.h> - -#ifdef CONFIG_XIP_KERNEL -/* - * The XIP kernel text is mapped in the module area for modules and - * some other stuff to work without any indirect relocations. - * MODULES_VADDR is redefined here and not in asm/memory.h to avoid - * recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off. - */ -#undef MODULES_VADDR -#define MODULES_VADDR (((unsigned long)_etext + ~PMD_MASK) & PMD_MASK) -#endif - -#ifdef CONFIG_MMU -void *module_alloc(unsigned long size) -{ - return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, - GFP_KERNEL, PAGE_KERNEL_EXEC, -1, - __builtin_return_address(0)); -} -#endif - -int -apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, - unsigned int relindex, struct module *module) -{ - Elf32_Shdr *symsec = sechdrs + symindex; - Elf32_Shdr *relsec = sechdrs + relindex; - Elf32_Shdr *dstsec = sechdrs + relsec->sh_info; - Elf32_Rel *rel = (void *)relsec->sh_addr; - unsigned int i; - - for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) { - unsigned long loc; - Elf32_Sym *sym; - const char *symname; - s32 offset; -#ifdef CONFIG_THUMB2_KERNEL - u32 upper, lower, sign, j1, j2; -#endif - - offset = ELF32_R_SYM(rel->r_info); - if (offset < 0 || offset > (symsec->sh_size / sizeof(Elf32_Sym))) { - pr_err("%s: section %u reloc %u: bad relocation sym offset\n", - module->name, relindex, i); - return -ENOEXEC; - } - - sym = ((Elf32_Sym *)symsec->sh_addr) + offset; - symname = strtab + sym->st_name; - - if (rel->r_offset < 0 || rel->r_offset > dstsec->sh_size - sizeof(u32)) { - pr_err("%s: section %u reloc %u sym '%s': out of bounds relocation, offset %d size %u\n", - module->name, relindex, i, symname, - rel->r_offset, dstsec->sh_size); - return -ENOEXEC; - } - - loc = dstsec->sh_addr + rel->r_offset; - - switch (ELF32_R_TYPE(rel->r_info)) { - case R_ARM_NONE: - /* ignore */ - break; - - case R_ARM_ABS32: - *(u32 *)loc += sym->st_value; - break; - - case R_ARM_PC24: - case R_ARM_CALL: - case R_ARM_JUMP24: - offset = (*(u32 *)loc & 0x00ffffff) << 2; - if (offset & 0x02000000) - offset -= 0x04000000; - - offset += sym->st_value - loc; - if (offset & 3 || - offset <= (s32)0xfe000000 || - offset >= (s32)0x02000000) { - pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n", - module->name, relindex, i, symname, - ELF32_R_TYPE(rel->r_info), loc, - sym->st_value); - return -ENOEXEC; - } - - offset >>= 2; - - *(u32 *)loc &= 0xff000000; - *(u32 *)loc |= offset & 0x00ffffff; - break; - - case R_ARM_V4BX: - /* Preserve Rm and the condition code. Alter - * other bits to re-code instruction as - * MOV PC,Rm. - */ - *(u32 *)loc &= 0xf000000f; - *(u32 *)loc |= 0x01a0f000; - break; - - case R_ARM_PREL31: - offset = *(u32 *)loc + sym->st_value - loc; - *(u32 *)loc = offset & 0x7fffffff; - break; - - case R_ARM_MOVW_ABS_NC: - case R_ARM_MOVT_ABS: - offset = *(u32 *)loc; - offset = ((offset & 0xf0000) >> 4) | (offset & 0xfff); - offset = (offset ^ 0x8000) - 0x8000; - - offset += sym->st_value; - if (ELF32_R_TYPE(rel->r_info) == R_ARM_MOVT_ABS) - offset >>= 16; - - *(u32 *)loc &= 0xfff0f000; - *(u32 *)loc |= ((offset & 0xf000) << 4) | - (offset & 0x0fff); - break; - -#ifdef CONFIG_THUMB2_KERNEL - case R_ARM_THM_CALL: - case R_ARM_THM_JUMP24: - upper = *(u16 *)loc; - lower = *(u16 *)(loc + 2); - - /* - * 25 bit signed address range (Thumb-2 BL and B.W - * instructions): - * S:I1:I2:imm10:imm11:0 - * where: - * S = upper[10] = offset[24] - * I1 = ~(J1 ^ S) = offset[23] - * I2 = ~(J2 ^ S) = offset[22] - * imm10 = upper[9:0] = offset[21:12] - * imm11 = lower[10:0] = offset[11:1] - * J1 = lower[13] - * J2 = lower[11] - */ - sign = (upper >> 10) & 1; - j1 = (lower >> 13) & 1; - j2 = (lower >> 11) & 1; - offset = (sign << 24) | ((~(j1 ^ sign) & 1) << 23) | - ((~(j2 ^ sign) & 1) << 22) | - ((upper & 0x03ff) << 12) | - ((lower & 0x07ff) << 1); - if (offset & 0x01000000) - offset -= 0x02000000; - offset += sym->st_value - loc; - - /* - * For function symbols, only Thumb addresses are - * allowed (no interworking). - * - * For non-function symbols, the destination - * has no specific ARM/Thumb disposition, so - * the branch is resolved under the assumption - * that interworking is not required. - */ - if ((ELF32_ST_TYPE(sym->st_info) == STT_FUNC && - !(offset & 1)) || - offset <= (s32)0xff000000 || - offset >= (s32)0x01000000) { - pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n", - module->name, relindex, i, symname, - ELF32_R_TYPE(rel->r_info), loc, - sym->st_value); - return -ENOEXEC; - } - - sign = (offset >> 24) & 1; - j1 = sign ^ (~(offset >> 23) & 1); - j2 = sign ^ (~(offset >> 22) & 1); - *(u16 *)loc = (u16)((upper & 0xf800) | (sign << 10) | - ((offset >> 12) & 0x03ff)); - *(u16 *)(loc + 2) = (u16)((lower & 0xd000) | - (j1 << 13) | (j2 << 11) | - ((offset >> 1) & 0x07ff)); - break; - - case R_ARM_THM_MOVW_ABS_NC: - case R_ARM_THM_MOVT_ABS: - upper = *(u16 *)loc; - lower = *(u16 *)(loc + 2); - - /* - * MOVT/MOVW instructions encoding in Thumb-2: - * - * i = upper[10] - * imm4 = upper[3:0] - * imm3 = lower[14:12] - * imm8 = lower[7:0] - * - * imm16 = imm4:i:imm3:imm8 - */ - offset = ((upper & 0x000f) << 12) | - ((upper & 0x0400) << 1) | - ((lower & 0x7000) >> 4) | (lower & 0x00ff); - offset = (offset ^ 0x8000) - 0x8000; - offset += sym->st_value; - - if (ELF32_R_TYPE(rel->r_info) == R_ARM_THM_MOVT_ABS) - offset >>= 16; - - *(u16 *)loc = (u16)((upper & 0xfbf0) | - ((offset & 0xf000) >> 12) | - ((offset & 0x0800) >> 1)); - *(u16 *)(loc + 2) = (u16)((lower & 0x8f00) | - ((offset & 0x0700) << 4) | - (offset & 0x00ff)); - break; -#endif - - default: - printk(KERN_ERR "%s: unknown relocation: %u\n", - module->name, ELF32_R_TYPE(rel->r_info)); - return -ENOEXEC; - } - } - return 0; -} - -struct mod_unwind_map { - const Elf_Shdr *unw_sec; - const Elf_Shdr *txt_sec; -}; - -static const Elf_Shdr *find_mod_section(const Elf32_Ehdr *hdr, - const Elf_Shdr *sechdrs, const char *name) -{ - const Elf_Shdr *s, *se; - const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; - - for (s = sechdrs, se = sechdrs + hdr->e_shnum; s < se; s++) - if (strcmp(name, secstrs + s->sh_name) == 0) - return s; - - return NULL; -} - -extern void fixup_pv_table(const void *, unsigned long); -extern void fixup_smp(const void *, unsigned long); - -int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs, - struct module *mod) -{ - const Elf_Shdr *s = NULL; -#ifdef CONFIG_ARM_UNWIND - const char *secstrs = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; - const Elf_Shdr *sechdrs_end = sechdrs + hdr->e_shnum; - struct mod_unwind_map maps[ARM_SEC_MAX]; - int i; - - memset(maps, 0, sizeof(maps)); - - for (s = sechdrs; s < sechdrs_end; s++) { - const char *secname = secstrs + s->sh_name; - - if (!(s->sh_flags & SHF_ALLOC)) - continue; - - if (strcmp(".ARM.exidx.init.text", secname) == 0) - maps[ARM_SEC_INIT].unw_sec = s; - else if (strcmp(".ARM.exidx.devinit.text", secname) == 0) - maps[ARM_SEC_DEVINIT].unw_sec = s; - else if (strcmp(".ARM.exidx", secname) == 0) - maps[ARM_SEC_CORE].unw_sec = s; - else if (strcmp(".ARM.exidx.exit.text", secname) == 0) - maps[ARM_SEC_EXIT].unw_sec = s; - else if (strcmp(".ARM.exidx.devexit.text", secname) == 0) - maps[ARM_SEC_DEVEXIT].unw_sec = s; - else if (strcmp(".init.text", secname) == 0) - maps[ARM_SEC_INIT].txt_sec = s; - else if (strcmp(".devinit.text", secname) == 0) - maps[ARM_SEC_DEVINIT].txt_sec = s; - else if (strcmp(".text", secname) == 0) - maps[ARM_SEC_CORE].txt_sec = s; - else if (strcmp(".exit.text", secname) == 0) - maps[ARM_SEC_EXIT].txt_sec = s; - else if (strcmp(".devexit.text", secname) == 0) - maps[ARM_SEC_DEVEXIT].txt_sec = s; - } - - for (i = 0; i < ARM_SEC_MAX; i++) - if (maps[i].unw_sec && maps[i].txt_sec) - mod->arch.unwind[i] = - unwind_table_add(maps[i].unw_sec->sh_addr, - maps[i].unw_sec->sh_size, - maps[i].txt_sec->sh_addr, - maps[i].txt_sec->sh_size); -#endif -#ifdef CONFIG_ARM_PATCH_PHYS_VIRT - s = find_mod_section(hdr, sechdrs, ".pv_table"); - if (s) - fixup_pv_table((void *)s->sh_addr, s->sh_size); -#endif - s = find_mod_section(hdr, sechdrs, ".alt.smp.init"); - if (s && !is_smp()) -#ifdef CONFIG_SMP_ON_UP - fixup_smp((void *)s->sh_addr, s->sh_size); -#else - return -EINVAL; -#endif - return 0; -} - -void -module_arch_cleanup(struct module *mod) -{ -#ifdef CONFIG_ARM_UNWIND - int i; - - for (i = 0; i < ARM_SEC_MAX; i++) - if (mod->arch.unwind[i]) - unwind_table_del(mod->arch.unwind[i]); -#endif -} |