diff options
Diffstat (limited to 'arch/powerpc/kernel/module.c')
-rw-r--r-- | arch/powerpc/kernel/module.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/module.c b/arch/powerpc/kernel/module.c new file mode 100644 index 00000000000..40dd52d81c1 --- /dev/null +++ b/arch/powerpc/kernel/module.c @@ -0,0 +1,110 @@ +/* Kernel module help for powerpc. + Copyright (C) 2001, 2003 Rusty Russell IBM Corporation. + Copyright (C) 2008 Freescale Semiconductor, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ +#include <linux/module.h> +#include <linux/elf.h> +#include <linux/moduleloader.h> +#include <linux/err.h> +#include <linux/vmalloc.h> +#include <linux/bug.h> +#include <asm/module.h> +#include <asm/uaccess.h> +#include <asm/firmware.h> +#include <linux/sort.h> + +#include "setup.h" + +LIST_HEAD(module_bug_list); + +void *module_alloc(unsigned long size) +{ + if (size == 0) + return NULL; + + return vmalloc_exec(size); +} + +/* Free memory returned from module_alloc */ +void module_free(struct module *mod, void *module_region) +{ + vfree(module_region); + /* FIXME: If module_region == mod->init_region, trim exception + table entries. */ +} + +static const Elf_Shdr *find_section(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, + const char *name) +{ + char *secstrings; + unsigned int i; + + secstrings = (char *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; + for (i = 1; i < hdr->e_shnum; i++) + if (strcmp(secstrings+sechdrs[i].sh_name, name) == 0) + return &sechdrs[i]; + return NULL; +} + +int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, struct module *me) +{ + const Elf_Shdr *sect; + int err; + + err = module_bug_finalize(hdr, sechdrs, me); + if (err) + return err; + + /* Apply feature fixups */ + sect = find_section(hdr, sechdrs, "__ftr_fixup"); + if (sect != NULL) + do_feature_fixups(cur_cpu_spec->cpu_features, + (void *)sect->sh_addr, + (void *)sect->sh_addr + sect->sh_size); + +#ifdef CONFIG_PPC64 + sect = find_section(hdr, sechdrs, "__fw_ftr_fixup"); + if (sect != NULL) + do_feature_fixups(powerpc_firmware_features, + (void *)sect->sh_addr, + (void *)sect->sh_addr + sect->sh_size); +#endif + + return 0; +} + +void module_arch_cleanup(struct module *mod) +{ + module_bug_cleanup(mod); +} + +struct bug_entry *module_find_bug(unsigned long bugaddr) +{ + struct mod_arch_specific *mod; + unsigned int i; + struct bug_entry *bug; + + list_for_each_entry(mod, &module_bug_list, bug_list) { + bug = mod->bug_table; + for (i = 0; i < mod->num_bugs; ++i, ++bug) + if (bugaddr == bug->bug_addr) + return bug; + } + return NULL; +} |