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Commit | Line | Data |
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1da177e4 LT |
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> | |
5a0e3ad6 | 12 | #include <linux/gfp.h> |
1da177e4 | 13 | #include <linux/string.h> |
e6b04fe0 | 14 | #include <linux/ctype.h> |
1da177e4 LT |
15 | #include <linux/mm.h> |
16 | ||
17 | #include <asm/processor.h> | |
18 | #include <asm/spitfire.h> | |
d550bbd4 | 19 | #include <asm/cacheflush.h> |
1da177e4 | 20 | |
0b64120c DM |
21 | #include "entry.h" |
22 | ||
627bf2f6 | 23 | #ifdef CONFIG_SPARC64 |
dff9d3c2 DM |
24 | |
25 | #include <linux/jump_label.h> | |
26 | ||
1da177e4 LT |
27 | static void *module_map(unsigned long size) |
28 | { | |
d0a21265 | 29 | if (PAGE_ALIGN(size) > MODULES_LEN) |
1da177e4 | 30 | return NULL; |
d0a21265 DR |
31 | return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, |
32 | GFP_KERNEL, PAGE_KERNEL, -1, | |
33 | __builtin_return_address(0)); | |
1da177e4 LT |
34 | } |
35 | ||
627bf2f6 SR |
36 | static char *dot2underscore(char *name) |
37 | { | |
38 | return name; | |
39 | } | |
e6b04fe0 SR |
40 | #else |
41 | static void *module_map(unsigned long size) | |
42 | { | |
43 | return vmalloc(size); | |
44 | } | |
45 | ||
46 | /* Replace references to .func with _Func */ | |
47 | static char *dot2underscore(char *name) | |
48 | { | |
49 | if (name[0] == '.') { | |
50 | name[0] = '_'; | |
51 | name[1] = toupper(name[1]); | |
52 | } | |
53 | return name; | |
54 | } | |
627bf2f6 SR |
55 | #endif /* CONFIG_SPARC64 */ |
56 | ||
1da177e4 LT |
57 | void *module_alloc(unsigned long size) |
58 | { | |
59 | void *ret; | |
60 | ||
61 | /* We handle the zero case fine, unlike vmalloc */ | |
62 | if (size == 0) | |
63 | return NULL; | |
64 | ||
65 | ret = module_map(size); | |
66 | if (!ret) | |
67 | ret = ERR_PTR(-ENOMEM); | |
68 | else | |
69 | memset(ret, 0, size); | |
70 | ||
71 | return ret; | |
72 | } | |
73 | ||
1da177e4 LT |
74 | /* Make generic code ignore STT_REGISTER dummy undefined symbols. */ |
75 | int module_frob_arch_sections(Elf_Ehdr *hdr, | |
76 | Elf_Shdr *sechdrs, | |
77 | char *secstrings, | |
78 | struct module *mod) | |
79 | { | |
80 | unsigned int symidx; | |
c45d1c20 | 81 | Elf_Sym *sym; |
627bf2f6 | 82 | char *strtab; |
1da177e4 LT |
83 | int i; |
84 | ||
85 | for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) { | |
86 | if (symidx == hdr->e_shnum-1) { | |
87 | printk("%s: no symtab found.\n", mod->name); | |
88 | return -ENOEXEC; | |
89 | } | |
90 | } | |
c45d1c20 | 91 | sym = (Elf_Sym *)sechdrs[symidx].sh_addr; |
1da177e4 LT |
92 | strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr; |
93 | ||
94 | for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) { | |
627bf2f6 SR |
95 | if (sym[i].st_shndx == SHN_UNDEF) { |
96 | if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) { | |
97 | sym[i].st_shndx = SHN_ABS; | |
98 | } else { | |
99 | char *name = strtab + sym[i].st_name; | |
100 | dot2underscore(name); | |
101 | } | |
102 | } | |
1da177e4 LT |
103 | } |
104 | return 0; | |
105 | } | |
106 | ||
c45d1c20 | 107 | int apply_relocate_add(Elf_Shdr *sechdrs, |
1da177e4 LT |
108 | const char *strtab, |
109 | unsigned int symindex, | |
110 | unsigned int relsec, | |
111 | struct module *me) | |
112 | { | |
113 | unsigned int i; | |
c45d1c20 SR |
114 | Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr; |
115 | Elf_Sym *sym; | |
1da177e4 LT |
116 | u8 *location; |
117 | u32 *loc32; | |
118 | ||
119 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { | |
c45d1c20 | 120 | Elf_Addr v; |
1da177e4 LT |
121 | |
122 | /* This is where to make the change */ | |
123 | location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr | |
124 | + rel[i].r_offset; | |
125 | loc32 = (u32 *) location; | |
126 | ||
627bf2f6 | 127 | #ifdef CONFIG_SPARC64 |
1da177e4 | 128 | BUG_ON(((u64)location >> (u64)32) != (u64)0); |
627bf2f6 | 129 | #endif /* CONFIG_SPARC64 */ |
1da177e4 LT |
130 | |
131 | /* This is the symbol it is referring to. Note that all | |
132 | undefined symbols have been resolved. */ | |
c45d1c20 SR |
133 | sym = (Elf_Sym *)sechdrs[symindex].sh_addr |
134 | + ELF_R_SYM(rel[i].r_info); | |
1da177e4 LT |
135 | v = sym->st_value + rel[i].r_addend; |
136 | ||
c45d1c20 | 137 | switch (ELF_R_TYPE(rel[i].r_info) & 0xff) { |
627bf2f6 | 138 | #ifdef CONFIG_SPARC64 |
1da177e4 LT |
139 | case R_SPARC_64: |
140 | location[0] = v >> 56; | |
141 | location[1] = v >> 48; | |
142 | location[2] = v >> 40; | |
143 | location[3] = v >> 32; | |
144 | location[4] = v >> 24; | |
145 | location[5] = v >> 16; | |
146 | location[6] = v >> 8; | |
147 | location[7] = v >> 0; | |
148 | break; | |
149 | ||
627bf2f6 SR |
150 | case R_SPARC_DISP32: |
151 | v -= (Elf_Addr) location; | |
152 | *loc32 = v; | |
153 | break; | |
154 | ||
155 | case R_SPARC_WDISP19: | |
156 | v -= (Elf_Addr) location; | |
157 | *loc32 = (*loc32 & ~0x7ffff) | | |
158 | ((v >> 2) & 0x7ffff); | |
159 | break; | |
160 | ||
161 | case R_SPARC_OLO10: | |
162 | *loc32 = (*loc32 & ~0x1fff) | | |
163 | (((v & 0x3ff) + | |
164 | (ELF_R_TYPE(rel[i].r_info) >> 8)) | |
165 | & 0x1fff); | |
166 | break; | |
167 | #endif /* CONFIG_SPARC64 */ | |
168 | ||
1da177e4 | 169 | case R_SPARC_32: |
e6b04fe0 | 170 | case R_SPARC_UA32: |
1da177e4 LT |
171 | location[0] = v >> 24; |
172 | location[1] = v >> 16; | |
173 | location[2] = v >> 8; | |
174 | location[3] = v >> 0; | |
175 | break; | |
176 | ||
177 | case R_SPARC_WDISP30: | |
c45d1c20 | 178 | v -= (Elf_Addr) location; |
1da177e4 LT |
179 | *loc32 = (*loc32 & ~0x3fffffff) | |
180 | ((v >> 2) & 0x3fffffff); | |
181 | break; | |
182 | ||
183 | case R_SPARC_WDISP22: | |
c45d1c20 | 184 | v -= (Elf_Addr) location; |
1da177e4 LT |
185 | *loc32 = (*loc32 & ~0x3fffff) | |
186 | ((v >> 2) & 0x3fffff); | |
187 | break; | |
188 | ||
1da177e4 LT |
189 | case R_SPARC_LO10: |
190 | *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff); | |
191 | break; | |
192 | ||
193 | case R_SPARC_HI22: | |
194 | *loc32 = (*loc32 & ~0x3fffff) | | |
195 | ((v >> 10) & 0x3fffff); | |
196 | break; | |
197 | ||
1da177e4 LT |
198 | default: |
199 | printk(KERN_ERR "module %s: Unknown relocation: %x\n", | |
200 | me->name, | |
c45d1c20 | 201 | (int) (ELF_R_TYPE(rel[i].r_info) & 0xff)); |
1da177e4 | 202 | return -ENOEXEC; |
6cb79b3f | 203 | } |
1da177e4 LT |
204 | } |
205 | return 0; | |
206 | } | |
207 | ||
627bf2f6 | 208 | #ifdef CONFIG_SPARC64 |
0b64120c DM |
209 | static void do_patch_sections(const Elf_Ehdr *hdr, |
210 | const Elf_Shdr *sechdrs) | |
211 | { | |
212 | const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL; | |
213 | char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; | |
214 | ||
215 | for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { | |
216 | if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name)) | |
217 | sun4v_1insn = s; | |
218 | if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name)) | |
219 | sun4v_2insn = s; | |
220 | } | |
221 | ||
222 | if (sun4v_1insn && tlb_type == hypervisor) { | |
223 | void *p = (void *) sun4v_1insn->sh_addr; | |
224 | sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size); | |
225 | } | |
226 | if (sun4v_2insn && tlb_type == hypervisor) { | |
227 | void *p = (void *) sun4v_2insn->sh_addr; | |
228 | sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size); | |
229 | } | |
230 | } | |
231 | ||
1da177e4 LT |
232 | int module_finalize(const Elf_Ehdr *hdr, |
233 | const Elf_Shdr *sechdrs, | |
234 | struct module *me) | |
235 | { | |
dff9d3c2 DM |
236 | /* make jump label nops */ |
237 | jump_label_apply_nops(me); | |
238 | ||
0b64120c DM |
239 | do_patch_sections(hdr, sechdrs); |
240 | ||
1da177e4 LT |
241 | /* Cheetah's I-cache is fully coherent. */ |
242 | if (tlb_type == spitfire) { | |
243 | unsigned long va; | |
244 | ||
245 | flushw_all(); | |
246 | for (va = 0; va < (PAGE_SIZE << 1); va += 32) | |
247 | spitfire_put_icache_tag(va, 0x0); | |
248 | __asm__ __volatile__("flush %g6"); | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
627bf2f6 | 253 | #endif /* CONFIG_SPARC64 */ |