diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/kernel/module.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/sh/kernel/module.c')
-rw-r--r-- | arch/sh/kernel/module.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/sh/kernel/module.c b/arch/sh/kernel/module.c new file mode 100644 index 000000000000..142a4e5b7ebc --- /dev/null +++ b/arch/sh/kernel/module.c | |||
@@ -0,0 +1,146 @@ | |||
1 | /* Kernel module help for SH. | ||
2 | |||
3 | This program is free software; you can redistribute it and/or modify | ||
4 | it under the terms of the GNU General Public License as published by | ||
5 | the Free Software Foundation; either version 2 of the License, or | ||
6 | (at your option) any later version. | ||
7 | |||
8 | This program is distributed in the hope that it will be useful, | ||
9 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
11 | GNU General Public License for more details. | ||
12 | |||
13 | You should have received a copy of the GNU General Public License | ||
14 | along with this program; if not, write to the Free Software | ||
15 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
16 | */ | ||
17 | #include <linux/moduleloader.h> | ||
18 | #include <linux/elf.h> | ||
19 | #include <linux/vmalloc.h> | ||
20 | #include <linux/fs.h> | ||
21 | #include <linux/string.h> | ||
22 | #include <linux/kernel.h> | ||
23 | |||
24 | #if 0 | ||
25 | #define DEBUGP printk | ||
26 | #else | ||
27 | #define DEBUGP(fmt...) | ||
28 | #endif | ||
29 | |||
30 | void *module_alloc(unsigned long size) | ||
31 | { | ||
32 | if (size == 0) | ||
33 | return NULL; | ||
34 | return vmalloc(size); | ||
35 | } | ||
36 | |||
37 | |||
38 | /* Free memory returned from module_alloc */ | ||
39 | void module_free(struct module *mod, void *module_region) | ||
40 | { | ||
41 | vfree(module_region); | ||
42 | /* FIXME: If module_region == mod->init_region, trim exception | ||
43 | table entries. */ | ||
44 | } | ||
45 | |||
46 | /* We don't need anything special. */ | ||
47 | int module_frob_arch_sections(Elf_Ehdr *hdr, | ||
48 | Elf_Shdr *sechdrs, | ||
49 | char *secstrings, | ||
50 | struct module *mod) | ||
51 | { | ||
52 | return 0; | ||
53 | } | ||
54 | |||
55 | #define COPY_UNALIGNED_WORD(sw, tw, align) \ | ||
56 | { \ | ||
57 | void *__s = &(sw), *__t = &(tw); \ | ||
58 | unsigned short *__s2 = __s, *__t2 = __t; \ | ||
59 | unsigned char *__s1 = __s, *__t1 = __t; \ | ||
60 | switch ((align)) \ | ||
61 | { \ | ||
62 | case 0: \ | ||
63 | *(unsigned long *) __t = *(unsigned long *) __s; \ | ||
64 | break; \ | ||
65 | case 2: \ | ||
66 | *__t2++ = *__s2++; \ | ||
67 | *__t2 = *__s2; \ | ||
68 | break; \ | ||
69 | default: \ | ||
70 | *__t1++ = *__s1++; \ | ||
71 | *__t1++ = *__s1++; \ | ||
72 | *__t1++ = *__s1++; \ | ||
73 | *__t1 = *__s1; \ | ||
74 | break; \ | ||
75 | } \ | ||
76 | } | ||
77 | |||
78 | int apply_relocate_add(Elf32_Shdr *sechdrs, | ||
79 | const char *strtab, | ||
80 | unsigned int symindex, | ||
81 | unsigned int relsec, | ||
82 | struct module *me) | ||
83 | { | ||
84 | unsigned int i; | ||
85 | Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; | ||
86 | Elf32_Sym *sym; | ||
87 | Elf32_Addr relocation; | ||
88 | uint32_t *location; | ||
89 | uint32_t value; | ||
90 | int align; | ||
91 | |||
92 | DEBUGP("Applying relocate section %u to %u\n", relsec, | ||
93 | sechdrs[relsec].sh_info); | ||
94 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | ||
95 | /* This is where to make the change */ | ||
96 | location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr | ||
97 | + rel[i].r_offset; | ||
98 | /* This is the symbol it is referring to. Note that all | ||
99 | undefined symbols have been resolved. */ | ||
100 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | ||
101 | + ELF32_R_SYM(rel[i].r_info); | ||
102 | relocation = sym->st_value + rel[i].r_addend; | ||
103 | align = (int)location & 3; | ||
104 | |||
105 | switch (ELF32_R_TYPE(rel[i].r_info)) { | ||
106 | case R_SH_DIR32: | ||
107 | COPY_UNALIGNED_WORD (*location, value, align); | ||
108 | value += relocation; | ||
109 | COPY_UNALIGNED_WORD (value, *location, align); | ||
110 | break; | ||
111 | case R_SH_REL32: | ||
112 | relocation = (relocation - (Elf32_Addr) location); | ||
113 | COPY_UNALIGNED_WORD (*location, value, align); | ||
114 | value += relocation; | ||
115 | COPY_UNALIGNED_WORD (value, *location, align); | ||
116 | break; | ||
117 | default: | ||
118 | printk(KERN_ERR "module %s: Unknown relocation: %u\n", | ||
119 | me->name, ELF32_R_TYPE(rel[i].r_info)); | ||
120 | return -ENOEXEC; | ||
121 | } | ||
122 | } | ||
123 | return 0; | ||
124 | } | ||
125 | |||
126 | int apply_relocate(Elf32_Shdr *sechdrs, | ||
127 | const char *strtab, | ||
128 | unsigned int symindex, | ||
129 | unsigned int relsec, | ||
130 | struct module *me) | ||
131 | { | ||
132 | printk(KERN_ERR "module %s: REL RELOCATION unsupported\n", | ||
133 | me->name); | ||
134 | return -ENOEXEC; | ||
135 | } | ||
136 | |||
137 | int module_finalize(const Elf_Ehdr *hdr, | ||
138 | const Elf_Shdr *sechdrs, | ||
139 | struct module *me) | ||
140 | { | ||
141 | return 0; | ||
142 | } | ||
143 | |||
144 | void module_arch_cleanup(struct module *mod) | ||
145 | { | ||
146 | } | ||