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/sparc/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/sparc/kernel/module.c')
-rw-r--r-- | arch/sparc/kernel/module.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/arch/sparc/kernel/module.c b/arch/sparc/kernel/module.c new file mode 100644 index 000000000000..7931d6f92819 --- /dev/null +++ b/arch/sparc/kernel/module.c | |||
@@ -0,0 +1,159 @@ | |||
1 | /* Kernel module help for sparc32. | ||
2 | * | ||
3 | * Copyright (C) 2001 Rusty Russell. | ||
4 | * Copyright (C) 2002 David S. Miller. | ||
5 | */ | ||
6 | |||
7 | #include <linux/moduleloader.h> | ||
8 | #include <linux/kernel.h> | ||
9 | #include <linux/elf.h> | ||
10 | #include <linux/vmalloc.h> | ||
11 | #include <linux/fs.h> | ||
12 | #include <linux/string.h> | ||
13 | |||
14 | void *module_alloc(unsigned long size) | ||
15 | { | ||
16 | void *ret; | ||
17 | |||
18 | /* We handle the zero case fine, unlike vmalloc */ | ||
19 | if (size == 0) | ||
20 | return NULL; | ||
21 | |||
22 | ret = vmalloc(size); | ||
23 | if (!ret) | ||
24 | ret = ERR_PTR(-ENOMEM); | ||
25 | else | ||
26 | memset(ret, 0, size); | ||
27 | |||
28 | return ret; | ||
29 | } | ||
30 | |||
31 | /* Free memory returned from module_core_alloc/module_init_alloc */ | ||
32 | void module_free(struct module *mod, void *module_region) | ||
33 | { | ||
34 | vfree(module_region); | ||
35 | /* FIXME: If module_region == mod->init_region, trim exception | ||
36 | table entries. */ | ||
37 | } | ||
38 | |||
39 | /* Make generic code ignore STT_REGISTER dummy undefined symbols, | ||
40 | * and replace references to .func with func as in ppc64's dedotify. | ||
41 | */ | ||
42 | int module_frob_arch_sections(Elf_Ehdr *hdr, | ||
43 | Elf_Shdr *sechdrs, | ||
44 | char *secstrings, | ||
45 | struct module *mod) | ||
46 | { | ||
47 | unsigned int symidx; | ||
48 | Elf32_Sym *sym; | ||
49 | char *strtab; | ||
50 | int i; | ||
51 | |||
52 | for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) { | ||
53 | if (symidx == hdr->e_shnum-1) { | ||
54 | printk("%s: no symtab found.\n", mod->name); | ||
55 | return -ENOEXEC; | ||
56 | } | ||
57 | } | ||
58 | sym = (Elf32_Sym *)sechdrs[symidx].sh_addr; | ||
59 | strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr; | ||
60 | |||
61 | for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) { | ||
62 | if (sym[i].st_shndx == SHN_UNDEF) { | ||
63 | if (ELF32_ST_TYPE(sym[i].st_info) == STT_REGISTER) | ||
64 | sym[i].st_shndx = SHN_ABS; | ||
65 | else { | ||
66 | char *name = strtab + sym[i].st_name; | ||
67 | if (name[0] == '.') | ||
68 | memmove(name, name+1, strlen(name)); | ||
69 | } | ||
70 | } | ||
71 | } | ||
72 | return 0; | ||
73 | } | ||
74 | |||
75 | int apply_relocate(Elf32_Shdr *sechdrs, | ||
76 | const char *strtab, | ||
77 | unsigned int symindex, | ||
78 | unsigned int relsec, | ||
79 | struct module *me) | ||
80 | { | ||
81 | printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n", | ||
82 | me->name); | ||
83 | return -ENOEXEC; | ||
84 | } | ||
85 | |||
86 | int apply_relocate_add(Elf32_Shdr *sechdrs, | ||
87 | const char *strtab, | ||
88 | unsigned int symindex, | ||
89 | unsigned int relsec, | ||
90 | struct module *me) | ||
91 | { | ||
92 | unsigned int i; | ||
93 | Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; | ||
94 | Elf32_Sym *sym; | ||
95 | u8 *location; | ||
96 | u32 *loc32; | ||
97 | |||
98 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | ||
99 | Elf32_Addr v; | ||
100 | |||
101 | /* This is where to make the change */ | ||
102 | location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr | ||
103 | + rel[i].r_offset; | ||
104 | loc32 = (u32 *) location; | ||
105 | /* This is the symbol it is referring to. Note that all | ||
106 | undefined symbols have been resolved. */ | ||
107 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | ||
108 | + ELF32_R_SYM(rel[i].r_info); | ||
109 | v = sym->st_value + rel[i].r_addend; | ||
110 | |||
111 | switch (ELF32_R_TYPE(rel[i].r_info)) { | ||
112 | case R_SPARC_32: | ||
113 | location[0] = v >> 24; | ||
114 | location[1] = v >> 16; | ||
115 | location[2] = v >> 8; | ||
116 | location[3] = v >> 0; | ||
117 | break; | ||
118 | |||
119 | case R_SPARC_WDISP30: | ||
120 | v -= (Elf32_Addr) location; | ||
121 | *loc32 = (*loc32 & ~0x3fffffff) | | ||
122 | ((v >> 2) & 0x3fffffff); | ||
123 | break; | ||
124 | |||
125 | case R_SPARC_WDISP22: | ||
126 | v -= (Elf32_Addr) location; | ||
127 | *loc32 = (*loc32 & ~0x3fffff) | | ||
128 | ((v >> 2) & 0x3fffff); | ||
129 | break; | ||
130 | |||
131 | case R_SPARC_LO10: | ||
132 | *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff); | ||
133 | break; | ||
134 | |||
135 | case R_SPARC_HI22: | ||
136 | *loc32 = (*loc32 & ~0x3fffff) | | ||
137 | ((v >> 10) & 0x3fffff); | ||
138 | break; | ||
139 | |||
140 | default: | ||
141 | printk(KERN_ERR "module %s: Unknown relocation: %x\n", | ||
142 | me->name, | ||
143 | (int) (ELF32_R_TYPE(rel[i].r_info) & 0xff)); | ||
144 | return -ENOEXEC; | ||
145 | }; | ||
146 | } | ||
147 | return 0; | ||
148 | } | ||
149 | |||
150 | int module_finalize(const Elf_Ehdr *hdr, | ||
151 | const Elf_Shdr *sechdrs, | ||
152 | struct module *me) | ||
153 | { | ||
154 | return 0; | ||
155 | } | ||
156 | |||
157 | void module_arch_cleanup(struct module *mod) | ||
158 | { | ||
159 | } | ||