include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-2.6.git] / arch / sparc / kernel / module.c
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 static void *module_map(unsigned long size)
22 {
23         struct vm_struct *area;
24
25         size = PAGE_ALIGN(size);
26         if (!size || size > MODULES_LEN)
27                 return NULL;
28
29         area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
30         if (!area)
31                 return NULL;
32
33         return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL);
34 }
35
36 static char *dot2underscore(char *name)
37 {
38         return name;
39 }
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 }
55 #endif /* CONFIG_SPARC64 */
56
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
74 /* Free memory returned from module_core_alloc/module_init_alloc */
75 void module_free(struct module *mod, void *module_region)
76 {
77         vfree(module_region);
78 }
79
80 /* Make generic code ignore STT_REGISTER dummy undefined symbols.  */
81 int module_frob_arch_sections(Elf_Ehdr *hdr,
82                               Elf_Shdr *sechdrs,
83                               char *secstrings,
84                               struct module *mod)
85 {
86         unsigned int symidx;
87         Elf_Sym *sym;
88         char *strtab;
89         int i;
90
91         for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
92                 if (symidx == hdr->e_shnum-1) {
93                         printk("%s: no symtab found.\n", mod->name);
94                         return -ENOEXEC;
95                 }
96         }
97         sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
98         strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
99
100         for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
101                 if (sym[i].st_shndx == SHN_UNDEF) {
102                         if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER) {
103                                 sym[i].st_shndx = SHN_ABS;
104                         } else {
105                                 char *name = strtab + sym[i].st_name;
106                                 dot2underscore(name);
107                         }
108                 }
109         }
110         return 0;
111 }
112
113 int apply_relocate(Elf_Shdr *sechdrs,
114                    const char *strtab,
115                    unsigned int symindex,
116                    unsigned int relsec,
117                    struct module *me)
118 {
119         printk(KERN_ERR "module %s: non-ADD RELOCATION unsupported\n",
120                me->name);
121         return -ENOEXEC;
122 }
123
124 int apply_relocate_add(Elf_Shdr *sechdrs,
125                        const char *strtab,
126                        unsigned int symindex,
127                        unsigned int relsec,
128                        struct module *me)
129 {
130         unsigned int i;
131         Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
132         Elf_Sym *sym;
133         u8 *location;
134         u32 *loc32;
135
136         for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
137                 Elf_Addr v;
138
139                 /* This is where to make the change */
140                 location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
141                         + rel[i].r_offset;
142                 loc32 = (u32 *) location;
143
144 #ifdef CONFIG_SPARC64
145                 BUG_ON(((u64)location >> (u64)32) != (u64)0);
146 #endif /* CONFIG_SPARC64 */
147
148                 /* This is the symbol it is referring to.  Note that all
149                    undefined symbols have been resolved.  */
150                 sym = (Elf_Sym *)sechdrs[symindex].sh_addr
151                         + ELF_R_SYM(rel[i].r_info);
152                 v = sym->st_value + rel[i].r_addend;
153
154                 switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
155 #ifdef CONFIG_SPARC64
156                 case R_SPARC_64:
157                         location[0] = v >> 56;
158                         location[1] = v >> 48;
159                         location[2] = v >> 40;
160                         location[3] = v >> 32;
161                         location[4] = v >> 24;
162                         location[5] = v >> 16;
163                         location[6] = v >>  8;
164                         location[7] = v >>  0;
165                         break;
166
167                 case R_SPARC_DISP32:
168                         v -= (Elf_Addr) location;
169                         *loc32 = v;
170                         break;
171
172                 case R_SPARC_WDISP19:
173                         v -= (Elf_Addr) location;
174                         *loc32 = (*loc32 & ~0x7ffff) |
175                                 ((v >> 2) & 0x7ffff);
176                         break;
177
178                 case R_SPARC_OLO10:
179                         *loc32 = (*loc32 & ~0x1fff) |
180                                 (((v & 0x3ff) +
181                                   (ELF_R_TYPE(rel[i].r_info) >> 8))
182                                  & 0x1fff);
183                         break;
184 #endif /* CONFIG_SPARC64 */
185
186                 case R_SPARC_32:
187                 case R_SPARC_UA32:
188                         location[0] = v >> 24;
189                         location[1] = v >> 16;
190                         location[2] = v >>  8;
191                         location[3] = v >>  0;
192                         break;
193
194                 case R_SPARC_WDISP30:
195                         v -= (Elf_Addr) location;
196                         *loc32 = (*loc32 & ~0x3fffffff) |
197                                 ((v >> 2) & 0x3fffffff);
198                         break;
199
200                 case R_SPARC_WDISP22:
201                         v -= (Elf_Addr) location;
202                         *loc32 = (*loc32 & ~0x3fffff) |
203                                 ((v >> 2) & 0x3fffff);
204                         break;
205
206                 case R_SPARC_LO10:
207                         *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
208                         break;
209
210                 case R_SPARC_HI22:
211                         *loc32 = (*loc32 & ~0x3fffff) |
212                                 ((v >> 10) & 0x3fffff);
213                         break;
214
215                 default:
216                         printk(KERN_ERR "module %s: Unknown relocation: %x\n",
217                                me->name,
218                                (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
219                         return -ENOEXEC;
220                 };
221         }
222         return 0;
223 }
224
225 #ifdef CONFIG_SPARC64
226 int module_finalize(const Elf_Ehdr *hdr,
227                     const Elf_Shdr *sechdrs,
228                     struct module *me)
229 {
230         /* Cheetah's I-cache is fully coherent.  */
231         if (tlb_type == spitfire) {
232                 unsigned long va;
233
234                 flushw_all();
235                 for (va =  0; va < (PAGE_SIZE << 1); va += 32)
236                         spitfire_put_icache_tag(va, 0x0);
237                 __asm__ __volatile__("flush %g6");
238         }
239
240         return 0;
241 }
242 #else
243 int module_finalize(const Elf_Ehdr *hdr,
244                     const Elf_Shdr *sechdrs,
245                     struct module *me)
246 {
247         return 0;
248 }
249 #endif /* CONFIG_SPARC64 */
250
251 void module_arch_cleanup(struct module *mod)
252 {
253 }