1 /* Kernel module help for i386.
2 Copyright (C) 2001 Rusty Russell.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 #include <linux/moduleloader.h>
19 #include <linux/elf.h>
20 #include <linux/vmalloc.h>
22 #include <linux/string.h>
23 #include <linux/kernel.h>
28 #define DEBUGP(fmt , ...)
31 void *module_alloc(unsigned long size)
35 return vmalloc_exec(size);
39 /* Free memory returned from module_alloc */
40 void module_free(struct module *mod, void *module_region)
43 /* FIXME: If module_region == mod->init_region, trim exception
47 /* We don't need anything special. */
48 int module_frob_arch_sections(Elf_Ehdr *hdr,
56 int apply_relocate(Elf32_Shdr *sechdrs,
58 unsigned int symindex,
62 printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
66 int apply_relocate_add(Elf32_Shdr *sechdrs,
68 unsigned int symindex,
73 Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
75 DEBUGP ("Applying add relocate section %u to %u\n", relsec,
76 sechdrs[relsec].sh_info);
78 for (i = 0; i < sechdrs[relsec].sh_size / sizeof (*rela); i++) {
79 /* This is where to make the change */
81 = ((void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
83 /* This is the symbol it is referring to. Note that all
84 undefined symbols have been resolved. */
86 = ((Elf32_Sym *)sechdrs[symindex].sh_addr
87 + ELF32_R_SYM (rela[i].r_info));
88 switch (ELF32_R_TYPE(rela[i].r_info)) {
90 *loc = sym->st_value + rela[i].r_addend;
93 *loc = sym->st_value - (unsigned)loc + rela[i].r_addend - 4;
96 printk(KERN_ERR "module %s: Unknown relocation: %u\n",
97 me->name, ELF32_R_TYPE(rela[i].r_info));
105 int module_finalize(const Elf_Ehdr *hdr,
106 const Elf_Shdr *sechdrs,
112 void module_arch_cleanup(struct module *mod)