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a66af298 GU |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file COPYING in the main directory of this archive | |
4 | * for more details. | |
5 | */ | |
6 | ||
7 | #include <linux/moduleloader.h> | |
8 | #include <linux/elf.h> | |
9 | #include <linux/vmalloc.h> | |
10 | #include <linux/fs.h> | |
11 | #include <linux/string.h> | |
12 | #include <linux/kernel.h> | |
13 | ||
14 | #if 0 | |
15 | #define DEBUGP printk | |
1da177e4 | 16 | #else |
a66af298 GU |
17 | #define DEBUGP(fmt...) |
18 | #endif | |
19 | ||
20 | #ifdef CONFIG_MODULES | |
21 | ||
22 | int apply_relocate(Elf32_Shdr *sechdrs, | |
23 | const char *strtab, | |
24 | unsigned int symindex, | |
25 | unsigned int relsec, | |
26 | struct module *me) | |
27 | { | |
28 | unsigned int i; | |
29 | Elf32_Rel *rel = (void *)sechdrs[relsec].sh_addr; | |
30 | Elf32_Sym *sym; | |
31 | uint32_t *location; | |
32 | ||
33 | DEBUGP("Applying relocate section %u to %u\n", relsec, | |
34 | sechdrs[relsec].sh_info); | |
35 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
36 | /* This is where to make the change */ | |
37 | location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
38 | + rel[i].r_offset; | |
39 | /* This is the symbol it is referring to. Note that all | |
40 | undefined symbols have been resolved. */ | |
41 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | |
42 | + ELF32_R_SYM(rel[i].r_info); | |
43 | ||
44 | switch (ELF32_R_TYPE(rel[i].r_info)) { | |
45 | case R_68K_32: | |
46 | /* We add the value into the location given */ | |
47 | *location += sym->st_value; | |
48 | break; | |
49 | case R_68K_PC32: | |
2e76c283 | 50 | /* Add the value, subtract its position */ |
a66af298 GU |
51 | *location += sym->st_value - (uint32_t)location; |
52 | break; | |
53 | default: | |
54 | printk(KERN_ERR "module %s: Unknown relocation: %u\n", | |
55 | me->name, ELF32_R_TYPE(rel[i].r_info)); | |
56 | return -ENOEXEC; | |
57 | } | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
62 | int apply_relocate_add(Elf32_Shdr *sechdrs, | |
63 | const char *strtab, | |
64 | unsigned int symindex, | |
65 | unsigned int relsec, | |
66 | struct module *me) | |
67 | { | |
68 | unsigned int i; | |
69 | Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; | |
70 | Elf32_Sym *sym; | |
71 | uint32_t *location; | |
72 | ||
73 | DEBUGP("Applying relocate_add section %u to %u\n", relsec, | |
74 | sechdrs[relsec].sh_info); | |
75 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
76 | /* This is where to make the change */ | |
77 | location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
78 | + rel[i].r_offset; | |
79 | /* This is the symbol it is referring to. Note that all | |
80 | undefined symbols have been resolved. */ | |
81 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | |
82 | + ELF32_R_SYM(rel[i].r_info); | |
83 | ||
84 | switch (ELF32_R_TYPE(rel[i].r_info)) { | |
85 | case R_68K_32: | |
86 | /* We add the value into the location given */ | |
87 | *location = rel[i].r_addend + sym->st_value; | |
88 | break; | |
89 | case R_68K_PC32: | |
2e76c283 | 90 | /* Add the value, subtract its position */ |
a66af298 GU |
91 | *location = rel[i].r_addend + sym->st_value - (uint32_t)location; |
92 | break; | |
93 | default: | |
94 | printk(KERN_ERR "module %s: Unknown relocation: %u\n", | |
95 | me->name, ELF32_R_TYPE(rel[i].r_info)); | |
96 | return -ENOEXEC; | |
97 | } | |
98 | } | |
99 | return 0; | |
100 | } | |
101 | ||
102 | int module_finalize(const Elf_Ehdr *hdr, | |
103 | const Elf_Shdr *sechdrs, | |
104 | struct module *mod) | |
105 | { | |
106 | module_fixup(mod, mod->arch.fixup_start, mod->arch.fixup_end); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | #endif /* CONFIG_MODULES */ | |
111 | ||
112 | void module_fixup(struct module *mod, struct m68k_fixup_info *start, | |
113 | struct m68k_fixup_info *end) | |
114 | { | |
115 | #ifdef CONFIG_MMU | |
116 | struct m68k_fixup_info *fixup; | |
117 | ||
118 | for (fixup = start; fixup < end; fixup++) { | |
119 | switch (fixup->type) { | |
120 | case m68k_fixup_memoffset: | |
121 | *(u32 *)fixup->addr = m68k_memoffset; | |
122 | break; | |
123 | case m68k_fixup_vnode_shift: | |
124 | *(u16 *)fixup->addr += m68k_virt_to_node_shift; | |
125 | break; | |
126 | } | |
127 | } | |
1da177e4 | 128 | #endif |
a66af298 | 129 | } |