Root/
1 | /* Kernel module help for sparc64. |
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/gfp.h> |
13 | #include <linux/string.h> |
14 | #include <linux/ctype.h> |
15 | #include <linux/mm.h> |
16 | |
17 | #include <asm/processor.h> |
18 | #include <asm/spitfire.h> |
19 | |
20 | #ifdef CONFIG_SPARC64 |
21 | |
22 | #include <linux/jump_label.h> |
23 | |
24 | static void *module_map(unsigned long size) |
25 | { |
26 | struct vm_struct *area; |
27 | |
28 | size = PAGE_ALIGN(size); |
29 | if (!size || size > MODULES_LEN) |
30 | return NULL; |
31 | |
32 | area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END); |
33 | if (!area) |
34 | return NULL; |
35 | |
36 | return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL); |
37 | } |
38 | |
39 | static char *dot2underscore(char *name) |
40 | { |
41 | return name; |
42 | } |
43 | #else |
44 | static void *module_map(unsigned long size) |
45 | { |
46 | return vmalloc(size); |
47 | } |
48 | |
49 | /* Replace references to .func with _Func */ |
50 | static char *dot2underscore(char *name) |
51 | { |
52 | if (name[0] == '.') { |
53 | name[0] = '_'; |
54 | name[1] = toupper(name[1]); |
55 | } |
56 | return name; |
57 | } |
58 | #endif /* CONFIG_SPARC64 */ |
59 | |
60 | void *module_alloc(unsigned long size) |
61 | { |
62 | void *ret; |
63 | |
64 | /* We handle the zero case fine, unlike vmalloc */ |
65 | if (size == 0) |
66 | return NULL; |
67 | |
68 | ret = module_map(size); |
69 | if (!ret) |
70 | ret = ERR_PTR(-ENOMEM); |
71 | else |
72 | memset(ret, 0, size); |
73 | |
74 | return ret; |
75 | } |
76 | |
77 | /* Free memory returned from module_core_alloc/module_init_alloc */ |
78 | void module_free(struct module *mod, void *module_region) |
79 | { |
80 | vfree(module_region); |
81 | } |
82 | |
83 | /* Make generic code ignore STT_REGISTER dummy undefined symbols. */ |
84 | int module_frob_arch_sections(Elf_Ehdr *hdr, |
85 | Elf_Shdr *sechdrs, |
86 | char *secstrings, |
87 | struct module *mod) |
88 | { |
89 | unsigned int symidx; |
90 | Elf_Sym *sym; |
91 | char *strtab; |
92 | int i; |
93 | |
94 | for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) { |
95 | if (symidx == hdr->e_shnum-1) { |
96 | printk("%s: no symtab found.\n", mod->name); |
97 | return -ENOEXEC; |
98 | } |
99 | } |
100 | sym = (Elf_Sym *)sechdrs[symidx].sh_addr; |
101 | strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr; |
102 | |
103 | for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) { |
104 | if (sym[i].st_shndx == SHN_UNDEF) { |
105 | if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) { |
106 | sym[i].st_shndx = SHN_ABS; |
107 | } else { |
108 | char *name = strtab + sym[i].st_name; |
109 | dot2underscore(name); |
110 | } |
111 | } |
112 | } |
113 | return 0; |
114 | } |
115 | |
116 | int apply_relocate(Elf_Shdr *sechdrs, |
117 | const char *strtab, |
118 | unsigned int symindex, |
119 | unsigned int relsec, |
120 | struct module *me) |
121 | { |
122 | printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n", |
123 | me->name); |
124 | return -ENOEXEC; |
125 | } |
126 | |
127 | int apply_relocate_add(Elf_Shdr *sechdrs, |
128 | const char *strtab, |
129 | unsigned int symindex, |
130 | unsigned int relsec, |
131 | struct module *me) |
132 | { |
133 | unsigned int i; |
134 | Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr; |
135 | Elf_Sym *sym; |
136 | u8 *location; |
137 | u32 *loc32; |
138 | |
139 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { |
140 | Elf_Addr v; |
141 | |
142 | /* This is where to make the change */ |
143 | location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr |
144 | + rel[i].r_offset; |
145 | loc32 = (u32 *) location; |
146 | |
147 | #ifdef CONFIG_SPARC64 |
148 | BUG_ON(((u64)location >> (u64)32) != (u64)0); |
149 | #endif /* CONFIG_SPARC64 */ |
150 | |
151 | /* This is the symbol it is referring to. Note that all |
152 | undefined symbols have been resolved. */ |
153 | sym = (Elf_Sym *)sechdrs[symindex].sh_addr |
154 | + ELF_R_SYM(rel[i].r_info); |
155 | v = sym->st_value + rel[i].r_addend; |
156 | |
157 | switch (ELF_R_TYPE(rel[i].r_info) & 0xff) { |
158 | #ifdef CONFIG_SPARC64 |
159 | case R_SPARC_64: |
160 | location[0] = v >> 56; |
161 | location[1] = v >> 48; |
162 | location[2] = v >> 40; |
163 | location[3] = v >> 32; |
164 | location[4] = v >> 24; |
165 | location[5] = v >> 16; |
166 | location[6] = v >> 8; |
167 | location[7] = v >> 0; |
168 | break; |
169 | |
170 | case R_SPARC_DISP32: |
171 | v -= (Elf_Addr) location; |
172 | *loc32 = v; |
173 | break; |
174 | |
175 | case R_SPARC_WDISP19: |
176 | v -= (Elf_Addr) location; |
177 | *loc32 = (*loc32 & ~0x7ffff) | |
178 | ((v >> 2) & 0x7ffff); |
179 | break; |
180 | |
181 | case R_SPARC_OLO10: |
182 | *loc32 = (*loc32 & ~0x1fff) | |
183 | (((v & 0x3ff) + |
184 | (ELF_R_TYPE(rel[i].r_info) >> 8)) |
185 | & 0x1fff); |
186 | break; |
187 | #endif /* CONFIG_SPARC64 */ |
188 | |
189 | case R_SPARC_32: |
190 | case R_SPARC_UA32: |
191 | location[0] = v >> 24; |
192 | location[1] = v >> 16; |
193 | location[2] = v >> 8; |
194 | location[3] = v >> 0; |
195 | break; |
196 | |
197 | case R_SPARC_WDISP30: |
198 | v -= (Elf_Addr) location; |
199 | *loc32 = (*loc32 & ~0x3fffffff) | |
200 | ((v >> 2) & 0x3fffffff); |
201 | break; |
202 | |
203 | case R_SPARC_WDISP22: |
204 | v -= (Elf_Addr) location; |
205 | *loc32 = (*loc32 & ~0x3fffff) | |
206 | ((v >> 2) & 0x3fffff); |
207 | break; |
208 | |
209 | case R_SPARC_LO10: |
210 | *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff); |
211 | break; |
212 | |
213 | case R_SPARC_HI22: |
214 | *loc32 = (*loc32 & ~0x3fffff) | |
215 | ((v >> 10) & 0x3fffff); |
216 | break; |
217 | |
218 | default: |
219 | printk(KERN_ERR "module %s: Unknown relocation: %x\n", |
220 | me->name, |
221 | (int) (ELF_R_TYPE(rel[i].r_info) & 0xff)); |
222 | return -ENOEXEC; |
223 | }; |
224 | } |
225 | return 0; |
226 | } |
227 | |
228 | #ifdef CONFIG_SPARC64 |
229 | int module_finalize(const Elf_Ehdr *hdr, |
230 | const Elf_Shdr *sechdrs, |
231 | struct module *me) |
232 | { |
233 | /* make jump label nops */ |
234 | jump_label_apply_nops(me); |
235 | |
236 | /* Cheetah's I-cache is fully coherent. */ |
237 | if (tlb_type == spitfire) { |
238 | unsigned long va; |
239 | |
240 | flushw_all(); |
241 | for (va = 0; va < (PAGE_SIZE << 1); va += 32) |
242 | spitfire_put_icache_tag(va, 0x0); |
243 | __asm__ __volatile__("flush %g6"); |
244 | } |
245 | |
246 | return 0; |
247 | } |
248 | #else |
249 | int module_finalize(const Elf_Ehdr *hdr, |
250 | const Elf_Shdr *sechdrs, |
251 | struct module *me) |
252 | { |
253 | return 0; |
254 | } |
255 | #endif /* CONFIG_SPARC64 */ |
256 | |
257 | void module_arch_cleanup(struct module *mod) |
258 | { |
259 | } |
260 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9