]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Kernel module help for i386. |
2 | Copyright (C) 2001 Rusty Russell. | |
3 | ||
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. | |
8 | ||
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. | |
13 | ||
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 | |
17 | */ | |
18 | #include <linux/moduleloader.h> | |
19 | #include <linux/elf.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/kernel.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 LT |
25 | |
26 | #if 0 | |
27 | #define DEBUGP printk | |
28 | #else | |
29 | #define DEBUGP(fmt , ...) | |
30 | #endif | |
31 | ||
08cfeacb JN |
32 | #ifdef CONFIG_ETRAX_KMALLOCED_MODULES |
33 | #define MALLOC_MODULE(size) kmalloc(size, GFP_KERNEL) | |
34 | #define FREE_MODULE(region) kfree(region) | |
35 | #else | |
36 | #define MALLOC_MODULE(size) vmalloc_exec(size) | |
37 | #define FREE_MODULE(region) vfree(region) | |
38 | #endif | |
39 | ||
1da177e4 LT |
40 | void *module_alloc(unsigned long size) |
41 | { | |
42 | if (size == 0) | |
43 | return NULL; | |
08cfeacb | 44 | return MALLOC_MODULE(size); |
1da177e4 LT |
45 | } |
46 | ||
47 | ||
48 | /* Free memory returned from module_alloc */ | |
49 | void module_free(struct module *mod, void *module_region) | |
50 | { | |
08cfeacb | 51 | FREE_MODULE(module_region); |
1da177e4 LT |
52 | } |
53 | ||
54 | /* We don't need anything special. */ | |
55 | int module_frob_arch_sections(Elf_Ehdr *hdr, | |
56 | Elf_Shdr *sechdrs, | |
57 | char *secstrings, | |
58 | struct module *mod) | |
59 | { | |
60 | return 0; | |
61 | } | |
62 | ||
63 | int apply_relocate(Elf32_Shdr *sechdrs, | |
64 | const char *strtab, | |
65 | unsigned int symindex, | |
66 | unsigned int relsec, | |
67 | struct module *me) | |
68 | { | |
5d01e6ce MS |
69 | printk(KERN_ERR "module %s: REL relocation unsupported\n", me->name); |
70 | return -ENOEXEC; | |
1da177e4 LT |
71 | } |
72 | ||
73 | int apply_relocate_add(Elf32_Shdr *sechdrs, | |
74 | const char *strtab, | |
75 | unsigned int symindex, | |
76 | unsigned int relsec, | |
77 | struct module *me) | |
78 | { | |
79 | unsigned int i; | |
80 | Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr; | |
81 | ||
5d01e6ce | 82 | DEBUGP ("Applying add relocate section %u to %u\n", relsec, |
1da177e4 LT |
83 | sechdrs[relsec].sh_info); |
84 | ||
85 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof (*rela); i++) { | |
86 | /* This is where to make the change */ | |
87 | uint32_t *loc | |
88 | = ((void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
89 | + rela[i].r_offset); | |
90 | /* This is the symbol it is referring to. Note that all | |
91 | undefined symbols have been resolved. */ | |
92 | Elf32_Sym *sym | |
93 | = ((Elf32_Sym *)sechdrs[symindex].sh_addr | |
94 | + ELF32_R_SYM (rela[i].r_info)); | |
5d01e6ce MS |
95 | switch (ELF32_R_TYPE(rela[i].r_info)) { |
96 | case R_CRIS_32: | |
97 | *loc = sym->st_value + rela[i].r_addend; | |
98 | break; | |
99 | case R_CRIS_32_PCREL: | |
100 | *loc = sym->st_value - (unsigned)loc + rela[i].r_addend - 4; | |
101 | break; | |
102 | default: | |
103 | printk(KERN_ERR "module %s: Unknown relocation: %u\n", | |
104 | me->name, ELF32_R_TYPE(rela[i].r_info)); | |
105 | return -ENOEXEC; | |
106 | } | |
1da177e4 LT |
107 | } |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | int module_finalize(const Elf_Ehdr *hdr, | |
113 | const Elf_Shdr *sechdrs, | |
114 | struct module *me) | |
115 | { | |
116 | return 0; | |
117 | } | |
118 | ||
119 | void module_arch_cleanup(struct module *mod) | |
120 | { | |
121 | } |