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/elf.h> 20 #include <linux/moduleloader.h> 21 #include <linux/err.h> 22 #include <linux/vmalloc.h> 23 #include <linux/bug.h> 24 #include <asm/module.h> 25 #include <linux/uaccess.h> 26 #include <asm/firmware.h> 27 #include <linux/sort.h> 28 #include <asm/setup.h> 29 30 static LIST_HEAD(module_bug_list); 31 32 static const Elf_Shdr *find_section(const Elf_Ehdr *hdr, 33 const Elf_Shdr *sechdrs, 34 const char *name) 35 { 36 char *secstrings; 37 unsigned int i; 38 39 secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; 40 for (i = 1; i < hdr->e_shnum; i++) 41 if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0) 42 return &sechdrs[i]; 43 return NULL; 44 } 45 46 int module_finalize(const Elf_Ehdr *hdr, 47 const Elf_Shdr *sechdrs, struct module *me) 48 { 49 const Elf_Shdr *sect; 50 int rc; 51 52 rc = module_finalize_ftrace(me, sechdrs); 53 if (rc) 54 return rc; 55 56 /* Apply feature fixups */ 57 sect = find_section(hdr, sechdrs, "__ftr_fixup"); 58 if (sect != NULL) 59 do_feature_fixups(cur_cpu_spec->cpu_features, 60 (void *)sect->sh_addr, 61 (void *)sect->sh_addr + sect->sh_size); 62 63 sect = find_section(hdr, sechdrs, "__mmu_ftr_fixup"); 64 if (sect != NULL) 65 do_feature_fixups(cur_cpu_spec->mmu_features, 66 (void *)sect->sh_addr, 67 (void *)sect->sh_addr + sect->sh_size); 68 69 #ifdef CONFIG_PPC64 70 sect = find_section(hdr, sechdrs, "__fw_ftr_fixup"); 71 if (sect != NULL) 72 do_feature_fixups(powerpc_firmware_features, 73 (void *)sect->sh_addr, 74 (void *)sect->sh_addr + sect->sh_size); 75 #endif 76 77 sect = find_section(hdr, sechdrs, "__lwsync_fixup"); 78 if (sect != NULL) 79 do_lwsync_fixups(cur_cpu_spec->cpu_features, 80 (void *)sect->sh_addr, 81 (void *)sect->sh_addr + sect->sh_size); 82 83 return 0; 84 } 85