| 1 | --- a/arch/mips/Makefile |
| 2 | +++ b/arch/mips/Makefile |
| 3 | @@ -85,7 +85,7 @@ all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64 |
| 4 | cflags-y += -G 0 -mno-abicalls -fno-pic -pipe |
| 5 | cflags-y += -msoft-float |
| 6 | LDFLAGS_vmlinux += -G 0 -static -n -nostdlib |
| 7 | -MODFLAGS += -mno-long-calls |
| 8 | +MODFLAGS += -mlong-calls |
| 9 | |
| 10 | cflags-y += -ffreestanding |
| 11 | |
| 12 | --- a/arch/mips/include/asm/module.h |
| 13 | +++ b/arch/mips/include/asm/module.h |
| 14 | @@ -9,11 +9,6 @@ struct mod_arch_specific { |
| 15 | struct list_head dbe_list; |
| 16 | const struct exception_table_entry *dbe_start; |
| 17 | const struct exception_table_entry *dbe_end; |
| 18 | - |
| 19 | - void *phys_plt_tbl; |
| 20 | - void *virt_plt_tbl; |
| 21 | - unsigned int phys_plt_offset; |
| 22 | - unsigned int virt_plt_offset; |
| 23 | }; |
| 24 | |
| 25 | typedef uint8_t Elf64_Byte; /* Type for a 8-bit quantity. */ |
| 26 | --- a/arch/mips/kernel/module.c |
| 27 | +++ b/arch/mips/kernel/module.c |
| 28 | @@ -43,117 +43,6 @@ static struct mips_hi16 *mips_hi16_list; |
| 29 | static LIST_HEAD(dbe_list); |
| 30 | static DEFINE_SPINLOCK(dbe_lock); |
| 31 | |
| 32 | -/* |
| 33 | - * Get the potential max trampolines size required of the init and |
| 34 | - * non-init sections. Only used if we cannot find enough contiguous |
| 35 | - * physically mapped memory to put the module into. |
| 36 | - */ |
| 37 | -static unsigned int |
| 38 | -get_plt_size(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, |
| 39 | - const char *secstrings, unsigned int symindex, bool is_init) |
| 40 | -{ |
| 41 | - unsigned long ret = 0; |
| 42 | - unsigned int i, j; |
| 43 | - Elf_Sym *syms; |
| 44 | - |
| 45 | - /* Everything marked ALLOC (this includes the exported symbols) */ |
| 46 | - for (i = 1; i < hdr->e_shnum; ++i) { |
| 47 | - unsigned int info = sechdrs[i].sh_info; |
| 48 | - |
| 49 | - if (sechdrs[i].sh_type != SHT_REL |
| 50 | - && sechdrs[i].sh_type != SHT_RELA) |
| 51 | - continue; |
| 52 | - |
| 53 | - /* Not a valid relocation section? */ |
| 54 | - if (info >= hdr->e_shnum) |
| 55 | - continue; |
| 56 | - |
| 57 | - /* Don't bother with non-allocated sections */ |
| 58 | - if (!(sechdrs[info].sh_flags & SHF_ALLOC)) |
| 59 | - continue; |
| 60 | - |
| 61 | - /* If it's called *.init*, and we're not init, we're |
| 62 | - not interested */ |
| 63 | - if ((strstr(secstrings + sechdrs[i].sh_name, ".init") != 0) |
| 64 | - != is_init) |
| 65 | - continue; |
| 66 | - |
| 67 | - syms = (Elf_Sym *) sechdrs[symindex].sh_addr; |
| 68 | - if (sechdrs[i].sh_type == SHT_REL) { |
| 69 | - Elf_Mips_Rel *rel = (void *) sechdrs[i].sh_addr; |
| 70 | - unsigned int size = sechdrs[i].sh_size / sizeof(*rel); |
| 71 | - |
| 72 | - for (j = 0; j < size; ++j) { |
| 73 | - Elf_Sym *sym; |
| 74 | - |
| 75 | - if (ELF_MIPS_R_TYPE(rel[j]) != R_MIPS_26) |
| 76 | - continue; |
| 77 | - |
| 78 | - sym = syms + ELF_MIPS_R_SYM(rel[j]); |
| 79 | - if (!is_init && sym->st_shndx != SHN_UNDEF) |
| 80 | - continue; |
| 81 | - |
| 82 | - ret += 4 * sizeof(int); |
| 83 | - } |
| 84 | - } else { |
| 85 | - Elf_Mips_Rela *rela = (void *) sechdrs[i].sh_addr; |
| 86 | - unsigned int size = sechdrs[i].sh_size / sizeof(*rela); |
| 87 | - |
| 88 | - for (j = 0; j < size; ++j) { |
| 89 | - Elf_Sym *sym; |
| 90 | - |
| 91 | - if (ELF_MIPS_R_TYPE(rela[j]) != R_MIPS_26) |
| 92 | - continue; |
| 93 | - |
| 94 | - sym = syms + ELF_MIPS_R_SYM(rela[j]); |
| 95 | - if (!is_init && sym->st_shndx != SHN_UNDEF) |
| 96 | - continue; |
| 97 | - |
| 98 | - ret += 4 * sizeof(int); |
| 99 | - } |
| 100 | - } |
| 101 | - } |
| 102 | - |
| 103 | - return ret; |
| 104 | -} |
| 105 | - |
| 106 | -#ifndef MODULE_START |
| 107 | -static void *alloc_phys(unsigned long size) |
| 108 | -{ |
| 109 | - unsigned order; |
| 110 | - struct page *page; |
| 111 | - struct page *p; |
| 112 | - |
| 113 | - size = PAGE_ALIGN(size); |
| 114 | - order = get_order(size); |
| 115 | - |
| 116 | - page = alloc_pages(GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN | |
| 117 | - __GFP_THISNODE, order); |
| 118 | - if (!page) |
| 119 | - return NULL; |
| 120 | - |
| 121 | - split_page(page, order); |
| 122 | - |
| 123 | - for (p = page + (size >> PAGE_SHIFT); p < page + (1 << order); ++p) |
| 124 | - __free_page(p); |
| 125 | - |
| 126 | - return page_address(page); |
| 127 | -} |
| 128 | -#endif |
| 129 | - |
| 130 | -static void free_phys(void *ptr, unsigned long size) |
| 131 | -{ |
| 132 | - struct page *page; |
| 133 | - struct page *end; |
| 134 | - |
| 135 | - page = virt_to_page(ptr); |
| 136 | - end = page + (PAGE_ALIGN(size) >> PAGE_SHIFT); |
| 137 | - |
| 138 | - for (; page < end; ++page) |
| 139 | - __free_page(page); |
| 140 | -} |
| 141 | - |
| 142 | - |
| 143 | void *module_alloc(unsigned long size) |
| 144 | { |
| 145 | #ifdef MODULE_START |
| 146 | @@ -169,99 +58,21 @@ void *module_alloc(unsigned long size) |
| 147 | |
| 148 | return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL); |
| 149 | #else |
| 150 | - void *ptr; |
| 151 | - |
| 152 | if (size == 0) |
| 153 | return NULL; |
| 154 | - |
| 155 | - ptr = alloc_phys(size); |
| 156 | - |
| 157 | - /* If we failed to allocate physically contiguous memory, |
| 158 | - * fall back to regular vmalloc. The module loader code will |
| 159 | - * create jump tables to handle long jumps */ |
| 160 | - if (!ptr) |
| 161 | - return vmalloc(size); |
| 162 | - |
| 163 | - return ptr; |
| 164 | -#endif |
| 165 | -} |
| 166 | - |
| 167 | -static inline bool is_phys_addr(void *ptr) |
| 168 | -{ |
| 169 | -#ifdef CONFIG_64BIT |
| 170 | - return (KSEGX((unsigned long)ptr) == CKSEG0); |
| 171 | -#else |
| 172 | - return (KSEGX(ptr) == KSEG0); |
| 173 | + return vmalloc(size); |
| 174 | #endif |
| 175 | } |
| 176 | |
| 177 | /* Free memory returned from module_alloc */ |
| 178 | void module_free(struct module *mod, void *module_region) |
| 179 | { |
| 180 | - if (is_phys_addr(module_region)) { |
| 181 | - if (mod->module_init == module_region) |
| 182 | - free_phys(module_region, mod->init_size); |
| 183 | - else if (mod->module_core == module_region) |
| 184 | - free_phys(module_region, mod->core_size); |
| 185 | - else |
| 186 | - BUG(); |
| 187 | - } else { |
| 188 | - vfree(module_region); |
| 189 | - } |
| 190 | -} |
| 191 | - |
| 192 | -static void *__module_alloc(int size, bool phys) |
| 193 | -{ |
| 194 | - void *ptr; |
| 195 | - |
| 196 | - if (phys) |
| 197 | - ptr = kmalloc(size, GFP_KERNEL); |
| 198 | - else |
| 199 | - ptr = vmalloc(size); |
| 200 | - return ptr; |
| 201 | -} |
| 202 | - |
| 203 | -static void __module_free(void *ptr) |
| 204 | -{ |
| 205 | - if (is_phys_addr(ptr)) |
| 206 | - kfree(ptr); |
| 207 | - else |
| 208 | - vfree(ptr); |
| 209 | + vfree(module_region); |
| 210 | } |
| 211 | |
| 212 | int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, |
| 213 | char *secstrings, struct module *mod) |
| 214 | { |
| 215 | - unsigned int symindex = 0; |
| 216 | - unsigned int core_size, init_size; |
| 217 | - int i; |
| 218 | - |
| 219 | - for (i = 1; i < hdr->e_shnum; i++) |
| 220 | - if (sechdrs[i].sh_type == SHT_SYMTAB) |
| 221 | - symindex = i; |
| 222 | - |
| 223 | - core_size = get_plt_size(hdr, sechdrs, secstrings, symindex, false); |
| 224 | - init_size = get_plt_size(hdr, sechdrs, secstrings, symindex, true); |
| 225 | - |
| 226 | - mod->arch.phys_plt_offset = 0; |
| 227 | - mod->arch.virt_plt_offset = 0; |
| 228 | - mod->arch.phys_plt_tbl = NULL; |
| 229 | - mod->arch.virt_plt_tbl = NULL; |
| 230 | - |
| 231 | - if ((core_size + init_size) == 0) |
| 232 | - return 0; |
| 233 | - |
| 234 | - mod->arch.phys_plt_tbl = __module_alloc(core_size + init_size, 1); |
| 235 | - if (!mod->arch.phys_plt_tbl) |
| 236 | - return -ENOMEM; |
| 237 | - |
| 238 | - mod->arch.virt_plt_tbl = __module_alloc(core_size + init_size, 0); |
| 239 | - if (!mod->arch.virt_plt_tbl) { |
| 240 | - __module_free(mod->arch.phys_plt_tbl); |
| 241 | - mod->arch.phys_plt_tbl = NULL; |
| 242 | - return -ENOMEM; |
| 243 | - } |
| 244 | - |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | @@ -284,36 +95,28 @@ static int apply_r_mips_32_rela(struct m |
| 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | -static Elf_Addr add_plt_entry_to(unsigned *plt_offset, |
| 253 | - void *start, Elf_Addr v) |
| 254 | +static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v) |
| 255 | { |
| 256 | - unsigned *tramp = start + *plt_offset; |
| 257 | - *plt_offset += 4 * sizeof(int); |
| 258 | - |
| 259 | - /* adjust carry for addiu */ |
| 260 | - if (v & 0x00008000) |
| 261 | - v += 0x10000; |
| 262 | - |
| 263 | - tramp[0] = 0x3c190000 | (v >> 16); /* lui t9, hi16 */ |
| 264 | - tramp[1] = 0x27390000 | (v & 0xffff); /* addiu t9, t9, lo16 */ |
| 265 | - tramp[2] = 0x03200008; /* jr t9 */ |
| 266 | - tramp[3] = 0x00000000; /* nop */ |
| 267 | + if (v % 4) { |
| 268 | + pr_err("module %s: dangerous R_MIPS_26 REL relocation\n", |
| 269 | + me->name); |
| 270 | + return -ENOEXEC; |
| 271 | + } |
| 272 | |
| 273 | - return (Elf_Addr) tramp; |
| 274 | -} |
| 275 | + if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { |
| 276 | + printk(KERN_ERR |
| 277 | + "module %s: relocation overflow\n", |
| 278 | + me->name); |
| 279 | + return -ENOEXEC; |
| 280 | + } |
| 281 | |
| 282 | -static Elf_Addr add_plt_entry(struct module *me, void *location, Elf_Addr v) |
| 283 | -{ |
| 284 | - if (is_phys_addr(location)) |
| 285 | - return add_plt_entry_to(&me->arch.phys_plt_offset, |
| 286 | - me->arch.phys_plt_tbl, v); |
| 287 | - else |
| 288 | - return add_plt_entry_to(&me->arch.virt_plt_offset, |
| 289 | - me->arch.virt_plt_tbl, v); |
| 290 | + *location = (*location & ~0x03ffffff) | |
| 291 | + ((*location + (v >> 2)) & 0x03ffffff); |
| 292 | |
| 293 | + return 0; |
| 294 | } |
| 295 | |
| 296 | -static int set_r_mips_26(struct module *me, u32 *location, u32 ofs, Elf_Addr v) |
| 297 | +static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v) |
| 298 | { |
| 299 | if (v % 4) { |
| 300 | pr_err("module %s: dangerous R_MIPS_26 RELArelocation\n", |
| 301 | @@ -322,31 +125,17 @@ static int set_r_mips_26(struct module * |
| 302 | } |
| 303 | |
| 304 | if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { |
| 305 | - v = add_plt_entry(me, location, v + (ofs << 2)); |
| 306 | - if (!v) { |
| 307 | - printk(KERN_ERR |
| 308 | + printk(KERN_ERR |
| 309 | "module %s: relocation overflow\n", |
| 310 | me->name); |
| 311 | - return -ENOEXEC; |
| 312 | - } |
| 313 | - ofs = 0; |
| 314 | + return -ENOEXEC; |
| 315 | } |
| 316 | |
| 317 | - *location = (*location & ~0x03ffffff) | ((ofs + (v >> 2)) & 0x03ffffff); |
| 318 | + *location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff); |
| 319 | |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | -static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v) |
| 324 | -{ |
| 325 | - return set_r_mips_26(me, location, *location & 0x03ffffff, v); |
| 326 | -} |
| 327 | - |
| 328 | -static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v) |
| 329 | -{ |
| 330 | - return set_r_mips_26(me, location, 0, v); |
| 331 | -} |
| 332 | - |
| 333 | static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v) |
| 334 | { |
| 335 | struct mips_hi16 *n; |
| 336 | @@ -611,32 +400,11 @@ int module_finalize(const Elf_Ehdr *hdr, |
| 337 | list_add(&me->arch.dbe_list, &dbe_list); |
| 338 | spin_unlock_irq(&dbe_lock); |
| 339 | } |
| 340 | - |
| 341 | - /* Get rid of the fixup trampoline if we're running the module |
| 342 | - * from physically mapped address space */ |
| 343 | - if (me->arch.phys_plt_offset == 0) { |
| 344 | - __module_free(me->arch.phys_plt_tbl); |
| 345 | - me->arch.phys_plt_tbl = NULL; |
| 346 | - } |
| 347 | - if (me->arch.virt_plt_offset == 0) { |
| 348 | - __module_free(me->arch.virt_plt_tbl); |
| 349 | - me->arch.virt_plt_tbl = NULL; |
| 350 | - } |
| 351 | - |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | void module_arch_cleanup(struct module *mod) |
| 356 | { |
| 357 | - if (mod->arch.phys_plt_tbl) { |
| 358 | - __module_free(mod->arch.phys_plt_tbl); |
| 359 | - mod->arch.phys_plt_tbl = NULL; |
| 360 | - } |
| 361 | - if (mod->arch.virt_plt_tbl) { |
| 362 | - __module_free(mod->arch.virt_plt_tbl); |
| 363 | - mod->arch.virt_plt_tbl = NULL; |
| 364 | - } |
| 365 | - |
| 366 | spin_lock_irq(&dbe_lock); |
| 367 | list_del(&mod->arch.dbe_list); |
| 368 | spin_unlock_irq(&dbe_lock); |
| 369 | |
