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Diffstat (limited to 'arch/avr32/kernel/module.c')
-rw-r--r--arch/avr32/kernel/module.c291
1 files changed, 0 insertions, 291 deletions
diff --git a/arch/avr32/kernel/module.c b/arch/avr32/kernel/module.c
deleted file mode 100644
index 2b4c54c04cb6..000000000000
--- a/arch/avr32/kernel/module.c
+++ /dev/null
@@ -1,291 +0,0 @@
-/*
- * AVR32-specific kernel module loader
- *
- * Copyright (C) 2005-2006 Atmel Corporation
- *
- * GOT initialization parts are based on the s390 version
- * Copyright (C) 2002, 2003 IBM Deutschland Entwicklung GmbH,
- * IBM Corporation
- *
- * 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.
- */
-
-#include <linux/bug.h>
-#include <linux/elf.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleloader.h>
-#include <linux/vmalloc.h>
-
-void module_arch_freeing_init(struct module *mod)
-{
- vfree(mod->arch.syminfo);
- mod->arch.syminfo = NULL;
-}
-
-static inline int check_rela(Elf32_Rela *rela, struct module *module,
- char *strings, Elf32_Sym *symbols)
-{
- struct mod_arch_syminfo *info;
-
- info = module->arch.syminfo + ELF32_R_SYM(rela->r_info);
- switch (ELF32_R_TYPE(rela->r_info)) {
- case R_AVR32_GOT32:
- case R_AVR32_GOT16:
- case R_AVR32_GOT8:
- case R_AVR32_GOT21S:
- case R_AVR32_GOT18SW: /* mcall */
- case R_AVR32_GOT16S: /* ld.w */
- if (rela->r_addend != 0) {
- printk(KERN_ERR
- "GOT relocation against %s at offset %u with addend\n",
- strings + symbols[ELF32_R_SYM(rela->r_info)].st_name,
- rela->r_offset);
- return -ENOEXEC;
- }
- if (info->got_offset == -1UL) {
- info->got_offset = module->arch.got_size;
- module->arch.got_size += sizeof(void *);
- }
- pr_debug("GOT[%3lu] %s\n", info->got_offset,
- strings + symbols[ELF32_R_SYM(rela->r_info)].st_name);
- break;
- }
-
- return 0;
-}
-
-int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
- char *secstrings, struct module *module)
-{
- Elf32_Shdr *symtab;
- Elf32_Sym *symbols;
- Elf32_Rela *rela;
- char *strings;
- int nrela, i, j;
- int ret;
-
- /* Find the symbol table */
- symtab = NULL;
- for (i = 0; i < hdr->e_shnum; i++)
- switch (sechdrs[i].sh_type) {
- case SHT_SYMTAB:
- symtab = &sechdrs[i];
- break;
- }
- if (!symtab) {
- printk(KERN_ERR "module %s: no symbol table\n", module->name);
- return -ENOEXEC;
- }
-
- /* Allocate room for one syminfo structure per symbol. */
- module->arch.nsyms = symtab->sh_size / sizeof(Elf_Sym);
- module->arch.syminfo = vmalloc(module->arch.nsyms
- * sizeof(struct mod_arch_syminfo));
- if (!module->arch.syminfo)
- return -ENOMEM;
-
- symbols = (void *)hdr + symtab->sh_offset;
- strings = (void *)hdr + sechdrs[symtab->sh_link].sh_offset;
- for (i = 0; i < module->arch.nsyms; i++) {
- if (symbols[i].st_shndx == SHN_UNDEF &&
- strcmp(strings + symbols[i].st_name,
- "_GLOBAL_OFFSET_TABLE_") == 0)
- /* "Define" it as absolute. */
- symbols[i].st_shndx = SHN_ABS;
- module->arch.syminfo[i].got_offset = -1UL;
- module->arch.syminfo[i].got_initialized = 0;
- }
-
- /* Allocate GOT entries for symbols that need it. */
- module->arch.got_size = 0;
- for (i = 0; i < hdr->e_shnum; i++) {
- if (sechdrs[i].sh_type != SHT_RELA)
- continue;
- nrela = sechdrs[i].sh_size / sizeof(Elf32_Rela);
- rela = (void *)hdr + sechdrs[i].sh_offset;
- for (j = 0; j < nrela; j++) {
- ret = check_rela(rela + j, module,
- strings, symbols);
- if (ret)
- goto out_free_syminfo;
- }
- }
-
- /*
- * Increase core size to make room for GOT and set start
- * offset for GOT.
- */
- module->core_layout.size = ALIGN(module->core_layout.size, 4);
- module->arch.got_offset = module->core_layout.size;
- module->core_layout.size += module->arch.got_size;
-
- return 0;
-
-out_free_syminfo:
- vfree(module->arch.syminfo);
- module->arch.syminfo = NULL;
-
- return ret;
-}
-
-static inline int reloc_overflow(struct module *module, const char *reloc_name,
- Elf32_Addr relocation)
-{
- printk(KERN_ERR "module %s: Value %lx does not fit relocation %s\n",
- module->name, (unsigned long)relocation, reloc_name);
- return -ENOEXEC;
-}
-
-#define get_u16(loc) (*((uint16_t *)loc))
-#define put_u16(loc, val) (*((uint16_t *)loc) = (val))
-
-int apply_relocate_add(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_Rela *rel = (void *)relsec->sh_addr;
- unsigned int i;
- int ret = 0;
-
- for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) {
- struct mod_arch_syminfo *info;
- Elf32_Sym *sym;
- Elf32_Addr relocation;
- uint32_t *location;
- uint32_t value;
-
- location = (void *)dstsec->sh_addr + rel->r_offset;
- sym = (Elf32_Sym *)symsec->sh_addr + ELF32_R_SYM(rel->r_info);
- relocation = sym->st_value + rel->r_addend;
-
- info = module->arch.syminfo + ELF32_R_SYM(rel->r_info);
-
- /* Initialize GOT entry if necessary */
- switch (ELF32_R_TYPE(rel->r_info)) {
- case R_AVR32_GOT32:
- case R_AVR32_GOT16:
- case R_AVR32_GOT8:
- case R_AVR32_GOT21S:
- case R_AVR32_GOT18SW:
- case R_AVR32_GOT16S:
- if (!info->got_initialized) {
- Elf32_Addr *gotent;
-
- gotent = (module->core_layout.base
- + module->arch.got_offset
- + info->got_offset);
- *gotent = relocation;
- info->got_initialized = 1;
- }
-
- relocation = info->got_offset;
- break;
- }
-
- switch (ELF32_R_TYPE(rel->r_info)) {
- case R_AVR32_32:
- case R_AVR32_32_CPENT:
- *location = relocation;
- break;
- case R_AVR32_22H_PCREL:
- relocation -= (Elf32_Addr)location;
- if ((relocation & 0xffe00001) != 0
- && (relocation & 0xffc00001) != 0xffc00000)
- return reloc_overflow(module,
- "R_AVR32_22H_PCREL",
- relocation);
- relocation >>= 1;
-
- value = *location;
- value = ((value & 0xe1ef0000)
- | (relocation & 0xffff)
- | ((relocation & 0x10000) << 4)
- | ((relocation & 0x1e0000) << 8));
- *location = value;
- break;
- case R_AVR32_11H_PCREL:
- relocation -= (Elf32_Addr)location;
- if ((relocation & 0xfffffc01) != 0
- && (relocation & 0xfffff801) != 0xfffff800)
- return reloc_overflow(module,
- "R_AVR32_11H_PCREL",
- relocation);
- value = get_u16(location);
- value = ((value & 0xf00c)
- | ((relocation & 0x1fe) << 3)
- | ((relocation & 0x600) >> 9));
- put_u16(location, value);
- break;
- case R_AVR32_9H_PCREL:
- relocation -= (Elf32_Addr)location;
- if ((relocation & 0xffffff01) != 0
- && (relocation & 0xfffffe01) != 0xfffffe00)
- return reloc_overflow(module,
- "R_AVR32_9H_PCREL",
- relocation);
- value = get_u16(location);
- value = ((value & 0xf00f)
- | ((relocation & 0x1fe) << 3));
- put_u16(location, value);
- break;
- case R_AVR32_9UW_PCREL:
- relocation -= ((Elf32_Addr)location) & 0xfffffffc;
- if ((relocation & 0xfffffc03) != 0)
- return reloc_overflow(module,
- "R_AVR32_9UW_PCREL",
- relocation);
- value = get_u16(location);
- value = ((value & 0xf80f)
- | ((relocation & 0x1fc) << 2));
- put_u16(location, value);
- break;
- case R_AVR32_GOTPC:
- /*
- * R6 = PC - (PC - GOT)
- *
- * At this point, relocation contains the
- * value of PC. Just subtract the value of
- * GOT, and we're done.
- */
- pr_debug("GOTPC: PC=0x%x, got_offset=0x%lx, core=0x%p\n",
- relocation, module->arch.got_offset,
- module->core_layout.base);
- relocation -= ((unsigned long)module->core_layout.base
- + module->arch.got_offset);
- *location = relocation;
- break;
- case R_AVR32_GOT18SW:
- if ((relocation & 0xfffe0003) != 0
- && (relocation & 0xfffc0000) != 0xfffc0000)
- return reloc_overflow(module, "R_AVR32_GOT18SW",
- relocation);
- relocation >>= 2;
- /* fall through */
- case R_AVR32_GOT16S:
- if ((relocation & 0xffff8000) != 0
- && (relocation & 0xffff0000) != 0xffff0000)
- return reloc_overflow(module, "R_AVR32_GOT16S",
- relocation);
- pr_debug("GOT reloc @ 0x%x -> %u\n",
- rel->r_offset, relocation);
- value = *location;
- value = ((value & 0xffff0000)
- | (relocation & 0xffff));
- *location = value;
- break;
-
- default:
- printk(KERN_ERR "module %s: Unknown relocation: %u\n",
- module->name, ELF32_R_TYPE(rel->r_info));
- return -ENOEXEC;
- }
- }
-
- return ret;
-}
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