Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 12 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/string.h> |
Sam Ravnborg | e6b04fe | 2008-12-26 15:38:17 -0800 | [diff] [blame] | 14 | #include <linux/ctype.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/mm.h> |
| 16 | |
| 17 | #include <asm/processor.h> |
| 18 | #include <asm/spitfire.h> |
| 19 | |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 20 | #ifdef CONFIG_SPARC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 36 | static char *dot2underscore(char *name) |
| 37 | { |
| 38 | return name; |
| 39 | } |
Sam Ravnborg | e6b04fe | 2008-12-26 15:38:17 -0800 | [diff] [blame] | 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 | } |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 55 | #endif /* CONFIG_SPARC64 */ |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 87 | Elf_Sym *sym; |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 88 | char *strtab; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 97 | sym = (Elf_Sym *)sechdrs[symidx].sh_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr; |
| 99 | |
| 100 | for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) { |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | return 0; |
| 111 | } |
| 112 | |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 113 | int apply_relocate(Elf_Shdr *sechdrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 124 | int apply_relocate_add(Elf_Shdr *sechdrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | const char *strtab, |
| 126 | unsigned int symindex, |
| 127 | unsigned int relsec, |
| 128 | struct module *me) |
| 129 | { |
| 130 | unsigned int i; |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 131 | Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr; |
| 132 | Elf_Sym *sym; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | u8 *location; |
| 134 | u32 *loc32; |
| 135 | |
| 136 | for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 137 | Elf_Addr v; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 144 | #ifdef CONFIG_SPARC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | BUG_ON(((u64)location >> (u64)32) != (u64)0); |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 146 | #endif /* CONFIG_SPARC64 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | /* This is the symbol it is referring to. Note that all |
| 149 | undefined symbols have been resolved. */ |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 150 | sym = (Elf_Sym *)sechdrs[symindex].sh_addr |
| 151 | + ELF_R_SYM(rel[i].r_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | v = sym->st_value + rel[i].r_addend; |
| 153 | |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 154 | switch (ELF_R_TYPE(rel[i].r_info) & 0xff) { |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 155 | #ifdef CONFIG_SPARC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | case R_SPARC_32: |
Sam Ravnborg | e6b04fe | 2008-12-26 15:38:17 -0800 | [diff] [blame] | 187 | case R_SPARC_UA32: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | location[0] = v >> 24; |
| 189 | location[1] = v >> 16; |
| 190 | location[2] = v >> 8; |
| 191 | location[3] = v >> 0; |
| 192 | break; |
| 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | case R_SPARC_WDISP30: |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 195 | v -= (Elf_Addr) location; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | *loc32 = (*loc32 & ~0x3fffffff) | |
| 197 | ((v >> 2) & 0x3fffffff); |
| 198 | break; |
| 199 | |
| 200 | case R_SPARC_WDISP22: |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 201 | v -= (Elf_Addr) location; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | *loc32 = (*loc32 & ~0x3fffff) | |
| 203 | ((v >> 2) & 0x3fffff); |
| 204 | break; |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | default: |
| 216 | printk(KERN_ERR "module %s: Unknown relocation: %x\n", |
| 217 | me->name, |
Sam Ravnborg | c45d1c2 | 2008-12-26 15:36:29 -0800 | [diff] [blame] | 218 | (int) (ELF_R_TYPE(rel[i].r_info) & 0xff)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | return -ENOEXEC; |
| 220 | }; |
| 221 | } |
| 222 | return 0; |
| 223 | } |
| 224 | |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 225 | #ifdef CONFIG_SPARC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Sam Ravnborg | e6b04fe | 2008-12-26 15:38:17 -0800 | [diff] [blame] | 242 | #else |
| 243 | int module_finalize(const Elf_Ehdr *hdr, |
| 244 | const Elf_Shdr *sechdrs, |
| 245 | struct module *me) |
| 246 | { |
| 247 | return 0; |
| 248 | } |
Sam Ravnborg | 627bf2f | 2008-12-26 15:37:24 -0800 | [diff] [blame] | 249 | #endif /* CONFIG_SPARC64 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | void module_arch_cleanup(struct module *mod) |
| 252 | { |
| 253 | } |