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review.evervolv.com / android_kernel_htc_msm8960 / 7febe2be36035e5c75128e8cc3baeb1f30fa2bc4 / . / arch / m68k / kernel / module_no.c
blob: d11ffae7956a5d31fbbc02251aff1fff073f3b0a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1#include <linux/moduleloader.h>
2#include <linux/elf.h>
3#include <linux/vmalloc.h>
4#include <linux/fs.h>
5#include <linux/string.h>
6#include <linux/kernel.h>
7
8#if 0
9#define DEBUGP printk
10#else
11#define DEBUGP(fmt...)
12#endif
13
14void *module_alloc(unsigned long size)
15{
16 if (size == 0)
17 return NULL;
18 return vmalloc(size);
19}
20
21
22/* Free memory returned from module_alloc */
23void module_free(struct module *mod, void *module_region)
24{
25 vfree(module_region);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]26}
27
28/* We don't need anything special. */
29int module_frob_arch_sections(Elf_Ehdr *hdr,
30 Elf_Shdr *sechdrs,
31 char *secstrings,
32 struct module *mod)
33{
34 return 0;
35}
36
37int apply_relocate(Elf32_Shdr *sechdrs,
38 const char *strtab,
39 unsigned int symindex,
40 unsigned int relsec,
41 struct module *me)
42{
43 unsigned int i;
44 Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr;
45 Elf32_Sym *sym;
46 uint32_t *location;
47
48 DEBUGP("Applying relocate section %u to %u\n", relsec,
49 sechdrs[relsec].sh_info);
50 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
51 /* This is where to make the change */
52 location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
53 + rel[i].r_offset;
54 /* This is the symbol it is referring to. Note that all
55 undefined symbols have been resolved. */
56 sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
57 + ELF32_R_SYM(rel[i].r_info);
58
59 switch (ELF32_R_TYPE(rel[i].r_info)) {
60 case R_68K_32:
61 /* We add the value into the location given */
62 *location += sym->st_value;
63 break;
64 case R_68K_PC32:
65 /* Add the value, subtract its postition */
66 *location += sym->st_value - (uint32_t)location;
67 break;
68 default:
69 printk(KERN_ERR "module %s: Unknown relocation: %u\n",
70 me->name, ELF32_R_TYPE(rel[i].r_info));
71 return -ENOEXEC;
72 }
73 }
74 return 0;
75}
76
77int apply_relocate_add(Elf32_Shdr *sechdrs,
78 const char *strtab,
79 unsigned int symindex,
80 unsigned int relsec,
81 struct module *me)
82{
83 unsigned int i;
84 Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
85 Elf32_Sym *sym;
86 uint32_t *location;
87
88 DEBUGP("Applying relocate_add section %u to %u\n", relsec,
89 sechdrs[relsec].sh_info);
90 for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
91 /* This is where to make the change */
92 location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
93 + rel[i].r_offset;
94 /* This is the symbol it is referring to. Note that all
95 undefined symbols have been resolved. */
96 sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
97 + ELF32_R_SYM(rel[i].r_info);
98
99 switch (ELF32_R_TYPE(rel[i].r_info)) {
100 case R_68K_32:
101 /* We add the value into the location given */
102 *location = rel[i].r_addend + sym->st_value;
103 break;
104 case R_68K_PC32:
105 /* Add the value, subtract its postition */
106 *location = rel[i].r_addend + sym->st_value - (uint32_t)location;
107 break;
108 default:
109 printk(KERN_ERR "module %s: Unknown relocation: %u\n",
110 me->name, ELF32_R_TYPE(rel[i].r_info));
111 return -ENOEXEC;
112 }
113 }
114 return 0;
115}
116
117int module_finalize(const Elf_Ehdr *hdr,
118 const Elf_Shdr *sechdrs,
119 struct module *me)
120{
121 return 0;
122}
123
124void module_arch_cleanup(struct module *mod)
125{
126}