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 #ifdef CONFIG_ETRAX_KMALLOCED_MODULES
32 #define MALLOC_MODULE(size) kmalloc(size, GFP_KERNEL)
33 #define FREE_MODULE(region) kfree(region)
35 #define MALLOC_MODULE(size) vmalloc_exec(size)
36 #define FREE_MODULE(region) vfree(region)
39 void *module_alloc(unsigned long size)
43 return MALLOC_MODULE(size);
47 /* Free memory returned from module_alloc */
48 void module_free(struct module *mod, void *module_region)
50 FREE_MODULE(module_region);
51 /* FIXME: If module_region == mod->init_region, trim exception
55 /* We don't need anything special. */
56 int module_frob_arch_sections(Elf_Ehdr *hdr,
64 int apply_relocate(Elf32_Shdr *sechdrs,
66 unsigned int symindex,
70 printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name);
74 int apply_relocate_add(Elf32_Shdr *sechdrs,
76 unsigned int symindex,
81 Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
83 DEBUGP ("Applying add relocate section %u to %u\n", relsec,
84 sechdrs[relsec].sh_info);
86 for (i = 0; i < sechdrs[relsec].sh_size / sizeof (*rela); i++) {
87 /* This is where to make the change */
89 = ((void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
91 /* This is the symbol it is referring to. Note that all
92 undefined symbols have been resolved. */
94 = ((Elf32_Sym *)sechdrs[symindex].sh_addr
95 + ELF32_R_SYM (rela[i].r_info));
96 switch (ELF32_R_TYPE(rela[i].r_info)) {
98 *loc = sym->st_value + rela[i].r_addend;
100 case R_CRIS_32_PCREL:
101 *loc = sym->st_value - (unsigned)loc + rela[i].r_addend - 4;
104 printk(KERN_ERR "module %s: Unknown relocation: %u\n",
105 me->name, ELF32_R_TYPE(rela[i].r_info));
113 int module_finalize(const Elf_Ehdr *hdr,
114 const Elf_Shdr *sechdrs,
120 void module_arch_cleanup(struct module *mod)