1/* Kernel module help for powerpc. 2 Copyright (C) 2001, 2003 Rusty Russell IBM Corporation. 3 Copyright (C) 2008 Freescale Semiconductor, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18*/ 19#include <linux/module.h> 20#include <linux/elf.h> 21#include <linux/moduleloader.h> 22#include <linux/err.h> 23#include <linux/vmalloc.h> 24#include <linux/bug.h> 25#include <asm/module.h> 26#include <asm/uaccess.h> 27#include <asm/firmware.h> 28#include <linux/sort.h> 29 30#include "setup.h" 31 32LIST_HEAD(module_bug_list); 33 34void *module_alloc(unsigned long size) 35{ 36 if (size == 0) 37 return NULL; 38 39 return vmalloc_exec(size); 40} 41 42/* Free memory returned from module_alloc */ 43void module_free(struct module *mod, void *module_region) 44{ 45 vfree(module_region); 46} 47 48static const Elf_Shdr *find_section(const Elf_Ehdr *hdr, 49 const Elf_Shdr *sechdrs, 50 const char *name) 51{ 52 char *secstrings; 53 unsigned int i; 54 55 secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; 56 for (i = 1; i < hdr->e_shnum; i++) 57 if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0) 58 return &sechdrs[i]; 59 return NULL; 60} 61 62int module_finalize(const Elf_Ehdr *hdr, 63 const Elf_Shdr *sechdrs, struct module *me) 64{ 65 const Elf_Shdr *sect; 66 67 /* Apply feature fixups */ 68 sect = find_section(hdr, sechdrs, "__ftr_fixup"); 69 if (sect != NULL) 70 do_feature_fixups(cur_cpu_spec->cpu_features, 71 (void *)sect->sh_addr, 72 (void *)sect->sh_addr + sect->sh_size); 73 74 sect = find_section(hdr, sechdrs, "__mmu_ftr_fixup"); 75 if (sect != NULL) 76 do_feature_fixups(cur_cpu_spec->mmu_features, 77 (void *)sect->sh_addr, 78 (void *)sect->sh_addr + sect->sh_size); 79 80#ifdef CONFIG_PPC64 81 sect = find_section(hdr, sechdrs, "__fw_ftr_fixup"); 82 if (sect != NULL) 83 do_feature_fixups(powerpc_firmware_features, 84 (void *)sect->sh_addr, 85 (void *)sect->sh_addr + sect->sh_size); 86#endif 87 88 sect = find_section(hdr, sechdrs, "__lwsync_fixup"); 89 if (sect != NULL) 90 do_lwsync_fixups(cur_cpu_spec->cpu_features, 91 (void *)sect->sh_addr, 92 (void *)sect->sh_addr + sect->sh_size); 93 94 return 0; 95} 96 97void module_arch_cleanup(struct module *mod) 98{ 99} 100