Commit | Line | Data |
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1da177e4 LT |
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> | |
7caaeabb | 13 | #include <linux/ctype.h> |
1da177e4 LT |
14 | |
15 | void *module_alloc(unsigned long size) | |
16 | { | |
17 | void *ret; | |
18 | ||
19 | /* We handle the zero case fine, unlike vmalloc */ | |
20 | if (size == 0) | |
21 | return NULL; | |
22 | ||
23 | ret = vmalloc(size); | |
24 | if (!ret) | |
25 | ret = ERR_PTR(-ENOMEM); | |
26 | else | |
27 | memset(ret, 0, size); | |
28 | ||
29 | return ret; | |
30 | } | |
31 | ||
32 | /* Free memory returned from module_core_alloc/module_init_alloc */ | |
33 | void module_free(struct module *mod, void *module_region) | |
34 | { | |
35 | vfree(module_region); | |
36 | /* FIXME: If module_region == mod->init_region, trim exception | |
37 | table entries. */ | |
38 | } | |
39 | ||
40 | /* Make generic code ignore STT_REGISTER dummy undefined symbols, | |
7caaeabb | 41 | * and replace references to .func with _Func |
1da177e4 LT |
42 | */ |
43 | int module_frob_arch_sections(Elf_Ehdr *hdr, | |
44 | Elf_Shdr *sechdrs, | |
45 | char *secstrings, | |
46 | struct module *mod) | |
47 | { | |
48 | unsigned int symidx; | |
49 | Elf32_Sym *sym; | |
50 | char *strtab; | |
51 | int i; | |
52 | ||
53 | for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) { | |
54 | if (symidx == hdr->e_shnum-1) { | |
55 | printk("%s: no symtab found.\n", mod->name); | |
56 | return -ENOEXEC; | |
57 | } | |
58 | } | |
59 | sym = (Elf32_Sym *)sechdrs[symidx].sh_addr; | |
60 | strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr; | |
61 | ||
62 | for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) { | |
63 | if (sym[i].st_shndx == SHN_UNDEF) { | |
64 | if (ELF32_ST_TYPE(sym[i].st_info) == STT_REGISTER) | |
65 | sym[i].st_shndx = SHN_ABS; | |
66 | else { | |
67 | char *name = strtab + sym[i].st_name; | |
7caaeabb AV |
68 | if (name[0] == '.') { |
69 | name[0] = '_'; | |
70 | name[1] = toupper(name[1]); | |
71 | } | |
1da177e4 LT |
72 | } |
73 | } | |
74 | } | |
75 | return 0; | |
76 | } | |
77 | ||
78 | int apply_relocate(Elf32_Shdr *sechdrs, | |
79 | const char *strtab, | |
80 | unsigned int symindex, | |
81 | unsigned int relsec, | |
82 | struct module *me) | |
83 | { | |
84 | printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n", | |
85 | me->name); | |
86 | return -ENOEXEC; | |
87 | } | |
88 | ||
89 | int apply_relocate_add(Elf32_Shdr *sechdrs, | |
90 | const char *strtab, | |
91 | unsigned int symindex, | |
92 | unsigned int relsec, | |
93 | struct module *me) | |
94 | { | |
95 | unsigned int i; | |
96 | Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; | |
97 | Elf32_Sym *sym; | |
98 | u8 *location; | |
99 | u32 *loc32; | |
100 | ||
101 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
102 | Elf32_Addr v; | |
103 | ||
104 | /* This is where to make the change */ | |
105 | location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
106 | + rel[i].r_offset; | |
107 | loc32 = (u32 *) location; | |
108 | /* This is the symbol it is referring to. Note that all | |
109 | undefined symbols have been resolved. */ | |
110 | sym = (Elf32_Sym *)sechdrs[symindex].sh_addr | |
111 | + ELF32_R_SYM(rel[i].r_info); | |
112 | v = sym->st_value + rel[i].r_addend; | |
113 | ||
114 | switch (ELF32_R_TYPE(rel[i].r_info)) { | |
115 | case R_SPARC_32: | |
06a1be16 | 116 | case R_SPARC_UA32: |
1da177e4 LT |
117 | location[0] = v >> 24; |
118 | location[1] = v >> 16; | |
119 | location[2] = v >> 8; | |
120 | location[3] = v >> 0; | |
121 | break; | |
122 | ||
123 | case R_SPARC_WDISP30: | |
124 | v -= (Elf32_Addr) location; | |
125 | *loc32 = (*loc32 & ~0x3fffffff) | | |
126 | ((v >> 2) & 0x3fffffff); | |
127 | break; | |
128 | ||
129 | case R_SPARC_WDISP22: | |
130 | v -= (Elf32_Addr) location; | |
131 | *loc32 = (*loc32 & ~0x3fffff) | | |
132 | ((v >> 2) & 0x3fffff); | |
133 | break; | |
134 | ||
135 | case R_SPARC_LO10: | |
136 | *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff); | |
137 | break; | |
138 | ||
139 | case R_SPARC_HI22: | |
140 | *loc32 = (*loc32 & ~0x3fffff) | | |
141 | ((v >> 10) & 0x3fffff); | |
142 | break; | |
143 | ||
144 | default: | |
145 | printk(KERN_ERR "module %s: Unknown relocation: %x\n", | |
146 | me->name, | |
147 | (int) (ELF32_R_TYPE(rel[i].r_info) & 0xff)); | |
148 | return -ENOEXEC; | |
149 | }; | |
150 | } | |
151 | return 0; | |
152 | } | |
153 | ||
154 | int module_finalize(const Elf_Ehdr *hdr, | |
155 | const Elf_Shdr *sechdrs, | |
156 | struct module *me) | |
157 | { | |
158 | return 0; | |
159 | } | |
160 | ||
161 | void module_arch_cleanup(struct module *mod) | |
162 | { | |
163 | } |