15f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen/* 25f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * AVR32-specific kernel module loader 35f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * 45f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * Copyright (C) 2005-2006 Atmel Corporation 55f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * 65f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * GOT initialization parts are based on the s390 version 75f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * Copyright (C) 2002, 2003 IBM Deutschland Entwicklung GmbH, 85f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * IBM Corporation 95f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * 105f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * This program is free software; you can redistribute it and/or modify 115f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * it under the terms of the GNU General Public License version 2 as 125f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * published by the Free Software Foundation. 135f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen */ 145f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 15623b0355d5b1f9c6d05005b649a2f3a7b9fd7816Haavard Skinnemoen#include <linux/bug.h> 165f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen#include <linux/elf.h> 17623b0355d5b1f9c6d05005b649a2f3a7b9fd7816Haavard Skinnemoen#include <linux/kernel.h> 18623b0355d5b1f9c6d05005b649a2f3a7b9fd7816Haavard Skinnemoen#include <linux/module.h> 19623b0355d5b1f9c6d05005b649a2f3a7b9fd7816Haavard Skinnemoen#include <linux/moduleloader.h> 205f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen#include <linux/vmalloc.h> 215f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 225f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoenvoid module_free(struct module *mod, void *module_region) 235f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen{ 245f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen vfree(mod->arch.syminfo); 255f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen mod->arch.syminfo = NULL; 265f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 275f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen vfree(module_region); 285f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen} 295f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 305f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoenstatic inline int check_rela(Elf32_Rela *rela, struct module *module, 315f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen char *strings, Elf32_Sym *symbols) 325f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen{ 335f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen struct mod_arch_syminfo *info; 345f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 355f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen info = module->arch.syminfo + ELF32_R_SYM(rela->r_info); 365f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen switch (ELF32_R_TYPE(rela->r_info)) { 375f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT32: 385f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT16: 395f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT8: 405f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT21S: 415f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT18SW: /* mcall */ 425f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT16S: /* ld.w */ 435f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (rela->r_addend != 0) { 445f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen printk(KERN_ERR 455f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen "GOT relocation against %s at offset %u with addend\n", 465f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen strings + symbols[ELF32_R_SYM(rela->r_info)].st_name, 475f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen rela->r_offset); 485f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return -ENOEXEC; 495f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 505f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (info->got_offset == -1UL) { 515f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen info->got_offset = module->arch.got_size; 525f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.got_size += sizeof(void *); 535f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 545f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen pr_debug("GOT[%3lu] %s\n", info->got_offset, 555f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen strings + symbols[ELF32_R_SYM(rela->r_info)].st_name); 565f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 575f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 585f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 595f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return 0; 605f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen} 615f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 625f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoenint module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, 635f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen char *secstrings, struct module *module) 645f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen{ 655f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Shdr *symtab; 665f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Sym *symbols; 675f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Rela *rela; 685f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen char *strings; 695f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen int nrela, i, j; 705f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen int ret; 715f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 725f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* Find the symbol table */ 735f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen symtab = NULL; 745f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen for (i = 0; i < hdr->e_shnum; i++) 755f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen switch (sechdrs[i].sh_type) { 765f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case SHT_SYMTAB: 775f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen symtab = &sechdrs[i]; 785f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 795f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 805f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (!symtab) { 815f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen printk(KERN_ERR "module %s: no symbol table\n", module->name); 825f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return -ENOEXEC; 835f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 845f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 855f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* Allocate room for one syminfo structure per symbol. */ 865f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.nsyms = symtab->sh_size / sizeof(Elf_Sym); 875f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.syminfo = vmalloc(module->arch.nsyms 885f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * sizeof(struct mod_arch_syminfo)); 895f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (!module->arch.syminfo) 905f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return -ENOMEM; 915f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 925f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen symbols = (void *)hdr + symtab->sh_offset; 935f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen strings = (void *)hdr + sechdrs[symtab->sh_link].sh_offset; 945f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen for (i = 0; i < module->arch.nsyms; i++) { 955f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (symbols[i].st_shndx == SHN_UNDEF && 965f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen strcmp(strings + symbols[i].st_name, 975f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen "_GLOBAL_OFFSET_TABLE_") == 0) 985f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* "Define" it as absolute. */ 995f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen symbols[i].st_shndx = SHN_ABS; 1005f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.syminfo[i].got_offset = -1UL; 1015f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.syminfo[i].got_initialized = 0; 1025f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 1035f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1045f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* Allocate GOT entries for symbols that need it. */ 1055f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.got_size = 0; 1065f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen for (i = 0; i < hdr->e_shnum; i++) { 1075f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (sechdrs[i].sh_type != SHT_RELA) 1085f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen continue; 1095f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen nrela = sechdrs[i].sh_size / sizeof(Elf32_Rela); 1105f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen rela = (void *)hdr + sechdrs[i].sh_offset; 1115f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen for (j = 0; j < nrela; j++) { 1125f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen ret = check_rela(rela + j, module, 1135f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen strings, symbols); 1145f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (ret) 1155f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen goto out_free_syminfo; 1165f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 1175f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 1185f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1195f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* 1205f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * Increase core size to make room for GOT and set start 1215f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * offset for GOT. 1225f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen */ 1235f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->core_size = ALIGN(module->core_size, 4); 1245f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.got_offset = module->core_size; 1255f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->core_size += module->arch.got_size; 1265f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1275f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return 0; 1285f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1295f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoenout_free_syminfo: 1305f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen vfree(module->arch.syminfo); 1315f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.syminfo = NULL; 1325f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1335f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return ret; 1345f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen} 1355f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1365f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoenstatic inline int reloc_overflow(struct module *module, const char *reloc_name, 1375f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Addr relocation) 1385f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen{ 1395f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen printk(KERN_ERR "module %s: Value %lx does not fit relocation %s\n", 1405f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->name, (unsigned long)relocation, reloc_name); 1415f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return -ENOEXEC; 1425f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen} 1435f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1445f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen#define get_u16(loc) (*((uint16_t *)loc)) 1455f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen#define put_u16(loc, val) (*((uint16_t *)loc) = (val)) 1465f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1475f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoenint apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, 1485f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen unsigned int symindex, unsigned int relindex, 1495f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen struct module *module) 1505f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen{ 1515f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Shdr *symsec = sechdrs + symindex; 1525f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Shdr *relsec = sechdrs + relindex; 1535f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Shdr *dstsec = sechdrs + relsec->sh_info; 1545f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Rela *rel = (void *)relsec->sh_addr; 1555f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen unsigned int i; 1565f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen int ret = 0; 1575f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1585f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) { 1595f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen struct mod_arch_syminfo *info; 1605f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Sym *sym; 1615f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Addr relocation; 1625f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen uint32_t *location; 1635f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen uint32_t value; 1645f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1655f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen location = (void *)dstsec->sh_addr + rel->r_offset; 1665f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen sym = (Elf32_Sym *)symsec->sh_addr + ELF32_R_SYM(rel->r_info); 1675f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation = sym->st_value + rel->r_addend; 1685f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1695f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen info = module->arch.syminfo + ELF32_R_SYM(rel->r_info); 1705f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1715f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* Initialize GOT entry if necessary */ 1725f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen switch (ELF32_R_TYPE(rel->r_info)) { 1735f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT32: 1745f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT16: 1755f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT8: 1765f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT21S: 1775f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT18SW: 1785f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT16S: 1795f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if (!info->got_initialized) { 1805f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen Elf32_Addr *gotent; 1815f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1825f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen gotent = (module->module_core 1835f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen + module->arch.got_offset 1845f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen + info->got_offset); 1855f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen *gotent = relocation; 1865f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen info->got_initialized = 1; 1875f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 1885f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1895f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation = info->got_offset; 1905f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 1915f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 1925f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 1935f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen switch (ELF32_R_TYPE(rel->r_info)) { 1945f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_32: 1955f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_32_CPENT: 1965f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen *location = relocation; 1975f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 1985f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_22H_PCREL: 1995f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation -= (Elf32_Addr)location; 2005f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if ((relocation & 0xffe00001) != 0 2015f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen && (relocation & 0xffc00001) != 0xffc00000) 2025f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return reloc_overflow(module, 2035f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen "R_AVR32_22H_PCREL", 2045f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation); 2055f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation >>= 1; 2065f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 2075f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = *location; 2085f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = ((value & 0xe1ef0000) 2095f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | (relocation & 0xffff) 2105f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | ((relocation & 0x10000) << 4) 2115f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | ((relocation & 0x1e0000) << 8)); 2125f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen *location = value; 2135f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 2145f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_11H_PCREL: 2155f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation -= (Elf32_Addr)location; 2165f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if ((relocation & 0xfffffc01) != 0 2175f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen && (relocation & 0xfffff801) != 0xfffff800) 2185f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return reloc_overflow(module, 2195f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen "R_AVR32_11H_PCREL", 2205f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation); 2215f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = get_u16(location); 2225f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = ((value & 0xf00c) 2235f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | ((relocation & 0x1fe) << 3) 2245f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | ((relocation & 0x600) >> 9)); 2255f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen put_u16(location, value); 2265f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 2275f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_9H_PCREL: 2285f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation -= (Elf32_Addr)location; 2295f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if ((relocation & 0xffffff01) != 0 2305f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen && (relocation & 0xfffffe01) != 0xfffffe00) 2315f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return reloc_overflow(module, 2325f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen "R_AVR32_9H_PCREL", 2335f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation); 2345f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = get_u16(location); 2355f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = ((value & 0xf00f) 2365f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | ((relocation & 0x1fe) << 3)); 2375f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen put_u16(location, value); 2385f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 2395f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_9UW_PCREL: 2405f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation -= ((Elf32_Addr)location) & 0xfffffffc; 2415f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if ((relocation & 0xfffffc03) != 0) 2425f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return reloc_overflow(module, 2435f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen "R_AVR32_9UW_PCREL", 2445f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation); 2455f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = get_u16(location); 2465f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = ((value & 0xf80f) 2475f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | ((relocation & 0x1fc) << 2)); 2485f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen put_u16(location, value); 2495f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 2505f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOTPC: 2515f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* 2525f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * R6 = PC - (PC - GOT) 2535f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * 2545f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * At this point, relocation contains the 2555f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * value of PC. Just subtract the value of 2565f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen * GOT, and we're done. 2575f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen */ 2586ea850b5eb17f6d21ac1b3d99406d213a10c64e9Haavard Skinnemoen pr_debug("GOTPC: PC=0x%x, got_offset=0x%lx, core=0x%p\n", 2595f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation, module->arch.got_offset, 2605f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->module_core); 2615f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation -= ((unsigned long)module->module_core 2625f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen + module->arch.got_offset); 2635f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen *location = relocation; 2645f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 2655f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT18SW: 2665f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if ((relocation & 0xfffe0003) != 0 2675f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen && (relocation & 0xfffc0003) != 0xffff0000) 2685f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return reloc_overflow(module, "R_AVR32_GOT18SW", 2695f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation); 2705f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation >>= 2; 2715f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen /* fall through */ 2725f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen case R_AVR32_GOT16S: 2735f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen if ((relocation & 0xffff8000) != 0 2745f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen && (relocation & 0xffff0000) != 0xffff0000) 2755f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return reloc_overflow(module, "R_AVR32_GOT16S", 2765f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen relocation); 2776ea850b5eb17f6d21ac1b3d99406d213a10c64e9Haavard Skinnemoen pr_debug("GOT reloc @ 0x%x -> %u\n", 2785f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen rel->r_offset, relocation); 2795f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = *location; 2805f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen value = ((value & 0xffff0000) 2815f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen | (relocation & 0xffff)); 2825f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen *location = value; 2835f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen break; 2845f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 2855f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen default: 2865f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen printk(KERN_ERR "module %s: Unknown relocation: %u\n", 2875f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->name, ELF32_R_TYPE(rel->r_info)); 2885f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return -ENOEXEC; 2895f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 2905f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen } 2915f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 2925f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen return ret; 2935f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen} 2945f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 2955f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoenint module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, 2965f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen struct module *module) 2975f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen{ 2985f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen vfree(module->arch.syminfo); 2995f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen module->arch.syminfo = NULL; 3005f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen 3015336377d6225959624146629ce3fc88ee8ecda3dLinus Torvalds return 0; 3025f97f7f9400de47ae837170bb274e90ad3934386Haavard Skinnemoen} 303