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TOMOYO Linux Cross Reference
Linux/arch/powerpc/kernel/module.c

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

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