14e6a05feSThiemo Seufer /* 24e6a05feSThiemo Seufer * This program is free software; you can redistribute it and/or modify 34e6a05feSThiemo Seufer * it under the terms of the GNU General Public License as published by 44e6a05feSThiemo Seufer * the Free Software Foundation; either version 2 of the License, or 54e6a05feSThiemo Seufer * (at your option) any later version. 64e6a05feSThiemo Seufer * 74e6a05feSThiemo Seufer * This program is distributed in the hope that it will be useful, 84e6a05feSThiemo Seufer * but WITHOUT ANY WARRANTY; without even the implied warranty of 94e6a05feSThiemo Seufer * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 104e6a05feSThiemo Seufer * GNU General Public License for more details. 114e6a05feSThiemo Seufer * 124e6a05feSThiemo Seufer * You should have received a copy of the GNU General Public License 134e6a05feSThiemo Seufer * along with this program; if not, write to the Free Software 144e6a05feSThiemo Seufer * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 154e6a05feSThiemo Seufer * 164e6a05feSThiemo Seufer * Copyright (C) 2001 Rusty Russell. 174e6a05feSThiemo Seufer * Copyright (C) 2003, 2004 Ralf Baechle (ralf@linux-mips.org) 184e6a05feSThiemo Seufer * Copyright (C) 2005 Thiemo Seufer 194e6a05feSThiemo Seufer */ 204e6a05feSThiemo Seufer 214e6a05feSThiemo Seufer #undef DEBUG 224e6a05feSThiemo Seufer 234e6a05feSThiemo Seufer #include <linux/moduleloader.h> 244e6a05feSThiemo Seufer #include <linux/elf.h> 2527ac792cSAndrea Righi #include <linux/mm.h> 264e6a05feSThiemo Seufer #include <linux/vmalloc.h> 274e6a05feSThiemo Seufer #include <linux/slab.h> 284e6a05feSThiemo Seufer #include <linux/fs.h> 294e6a05feSThiemo Seufer #include <linux/string.h> 304e6a05feSThiemo Seufer #include <linux/kernel.h> 311da177e4SLinus Torvalds #include <linux/module.h> 321da177e4SLinus Torvalds #include <linux/spinlock.h> 3394bb0c1aSDavid Daney #include <linux/jump_label.h> 3494bb0c1aSDavid Daney 35656be92fSAtsushi Nemoto #include <asm/pgtable.h> /* MODULE_START */ 361da177e4SLinus Torvalds 374e6a05feSThiemo Seufer struct mips_hi16 { 384e6a05feSThiemo Seufer struct mips_hi16 *next; 394e6a05feSThiemo Seufer Elf_Addr *addr; 404e6a05feSThiemo Seufer Elf_Addr value; 414e6a05feSThiemo Seufer }; 424e6a05feSThiemo Seufer 434e6a05feSThiemo Seufer static struct mips_hi16 *mips_hi16_list; 444e6a05feSThiemo Seufer 451da177e4SLinus Torvalds static LIST_HEAD(dbe_list); 461da177e4SLinus Torvalds static DEFINE_SPINLOCK(dbe_lock); 471da177e4SLinus Torvalds 484e6a05feSThiemo Seufer void *module_alloc(unsigned long size) 494e6a05feSThiemo Seufer { 50656be92fSAtsushi Nemoto #ifdef MODULE_START 51d0a21265SDavid Rientjes return __vmalloc_node_range(size, 1, MODULE_START, MODULE_END, 52d0a21265SDavid Rientjes GFP_KERNEL, PAGE_KERNEL, -1, 53d0a21265SDavid Rientjes __builtin_return_address(0)); 54656be92fSAtsushi Nemoto #else 554e6a05feSThiemo Seufer if (size == 0) 564e6a05feSThiemo Seufer return NULL; 574e6a05feSThiemo Seufer return vmalloc(size); 58656be92fSAtsushi Nemoto #endif 594e6a05feSThiemo Seufer } 604e6a05feSThiemo Seufer 614e6a05feSThiemo Seufer /* Free memory returned from module_alloc */ 624e6a05feSThiemo Seufer void module_free(struct module *mod, void *module_region) 634e6a05feSThiemo Seufer { 644e6a05feSThiemo Seufer vfree(module_region); 654e6a05feSThiemo Seufer } 664e6a05feSThiemo Seufer 674e6a05feSThiemo Seufer int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, 684e6a05feSThiemo Seufer char *secstrings, struct module *mod) 694e6a05feSThiemo Seufer { 704e6a05feSThiemo Seufer return 0; 714e6a05feSThiemo Seufer } 724e6a05feSThiemo Seufer 734e6a05feSThiemo Seufer static int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v) 744e6a05feSThiemo Seufer { 754e6a05feSThiemo Seufer return 0; 764e6a05feSThiemo Seufer } 774e6a05feSThiemo Seufer 784e6a05feSThiemo Seufer static int apply_r_mips_32_rel(struct module *me, u32 *location, Elf_Addr v) 794e6a05feSThiemo Seufer { 804e6a05feSThiemo Seufer *location += v; 814e6a05feSThiemo Seufer 824e6a05feSThiemo Seufer return 0; 834e6a05feSThiemo Seufer } 844e6a05feSThiemo Seufer 854e6a05feSThiemo Seufer static int apply_r_mips_32_rela(struct module *me, u32 *location, Elf_Addr v) 864e6a05feSThiemo Seufer { 874e6a05feSThiemo Seufer *location = v; 884e6a05feSThiemo Seufer 894e6a05feSThiemo Seufer return 0; 904e6a05feSThiemo Seufer } 914e6a05feSThiemo Seufer 924e6a05feSThiemo Seufer static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v) 934e6a05feSThiemo Seufer { 944e6a05feSThiemo Seufer if (v % 4) { 956f9fdeb6SRalf Baechle pr_err("module %s: dangerous R_MIPS_26 REL relocation\n", 966f9fdeb6SRalf Baechle me->name); 974e6a05feSThiemo Seufer return -ENOEXEC; 984e6a05feSThiemo Seufer } 994e6a05feSThiemo Seufer 1004e6a05feSThiemo Seufer if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { 1014e6a05feSThiemo Seufer printk(KERN_ERR 1024e6a05feSThiemo Seufer "module %s: relocation overflow\n", 1034e6a05feSThiemo Seufer me->name); 1044e6a05feSThiemo Seufer return -ENOEXEC; 1054e6a05feSThiemo Seufer } 1064e6a05feSThiemo Seufer 1074e6a05feSThiemo Seufer *location = (*location & ~0x03ffffff) | 1084e6a05feSThiemo Seufer ((*location + (v >> 2)) & 0x03ffffff); 1094e6a05feSThiemo Seufer 1104e6a05feSThiemo Seufer return 0; 1114e6a05feSThiemo Seufer } 1124e6a05feSThiemo Seufer 1134e6a05feSThiemo Seufer static int apply_r_mips_26_rela(struct module *me, u32 *location, Elf_Addr v) 1144e6a05feSThiemo Seufer { 1154e6a05feSThiemo Seufer if (v % 4) { 1166f9fdeb6SRalf Baechle pr_err("module %s: dangerous R_MIPS_26 RELArelocation\n", 1176f9fdeb6SRalf Baechle me->name); 1184e6a05feSThiemo Seufer return -ENOEXEC; 1194e6a05feSThiemo Seufer } 1204e6a05feSThiemo Seufer 1214e6a05feSThiemo Seufer if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) { 1224e6a05feSThiemo Seufer printk(KERN_ERR 1234e6a05feSThiemo Seufer "module %s: relocation overflow\n", 1244e6a05feSThiemo Seufer me->name); 1254e6a05feSThiemo Seufer return -ENOEXEC; 1264e6a05feSThiemo Seufer } 1274e6a05feSThiemo Seufer 1284e6a05feSThiemo Seufer *location = (*location & ~0x03ffffff) | ((v >> 2) & 0x03ffffff); 1294e6a05feSThiemo Seufer 1304e6a05feSThiemo Seufer return 0; 1314e6a05feSThiemo Seufer } 1324e6a05feSThiemo Seufer 1334e6a05feSThiemo Seufer static int apply_r_mips_hi16_rel(struct module *me, u32 *location, Elf_Addr v) 1344e6a05feSThiemo Seufer { 1354e6a05feSThiemo Seufer struct mips_hi16 *n; 1364e6a05feSThiemo Seufer 1374e6a05feSThiemo Seufer /* 1384e6a05feSThiemo Seufer * We cannot relocate this one now because we don't know the value of 1394e6a05feSThiemo Seufer * the carry we need to add. Save the information, and let LO16 do the 1404e6a05feSThiemo Seufer * actual relocation. 1414e6a05feSThiemo Seufer */ 1424e6a05feSThiemo Seufer n = kmalloc(sizeof *n, GFP_KERNEL); 1434e6a05feSThiemo Seufer if (!n) 1444e6a05feSThiemo Seufer return -ENOMEM; 1454e6a05feSThiemo Seufer 1464e6a05feSThiemo Seufer n->addr = (Elf_Addr *)location; 1474e6a05feSThiemo Seufer n->value = v; 1484e6a05feSThiemo Seufer n->next = mips_hi16_list; 1494e6a05feSThiemo Seufer mips_hi16_list = n; 1504e6a05feSThiemo Seufer 1514e6a05feSThiemo Seufer return 0; 1524e6a05feSThiemo Seufer } 1534e6a05feSThiemo Seufer 1544e6a05feSThiemo Seufer static int apply_r_mips_hi16_rela(struct module *me, u32 *location, Elf_Addr v) 1554e6a05feSThiemo Seufer { 1564e6a05feSThiemo Seufer *location = (*location & 0xffff0000) | 1574e6a05feSThiemo Seufer ((((long long) v + 0x8000LL) >> 16) & 0xffff); 1584e6a05feSThiemo Seufer 1594e6a05feSThiemo Seufer return 0; 1604e6a05feSThiemo Seufer } 1614e6a05feSThiemo Seufer 1624e6a05feSThiemo Seufer static int apply_r_mips_lo16_rel(struct module *me, u32 *location, Elf_Addr v) 1634e6a05feSThiemo Seufer { 1644e6a05feSThiemo Seufer unsigned long insnlo = *location; 1654e6a05feSThiemo Seufer Elf_Addr val, vallo; 1664e6a05feSThiemo Seufer 1674e6a05feSThiemo Seufer /* Sign extend the addend we extract from the lo insn. */ 1684e6a05feSThiemo Seufer vallo = ((insnlo & 0xffff) ^ 0x8000) - 0x8000; 1694e6a05feSThiemo Seufer 1704e6a05feSThiemo Seufer if (mips_hi16_list != NULL) { 1714e6a05feSThiemo Seufer struct mips_hi16 *l; 1724e6a05feSThiemo Seufer 1734e6a05feSThiemo Seufer l = mips_hi16_list; 1744e6a05feSThiemo Seufer while (l != NULL) { 1754e6a05feSThiemo Seufer struct mips_hi16 *next; 1764e6a05feSThiemo Seufer unsigned long insn; 1774e6a05feSThiemo Seufer 1784e6a05feSThiemo Seufer /* 1794e6a05feSThiemo Seufer * The value for the HI16 had best be the same. 1804e6a05feSThiemo Seufer */ 1814e6a05feSThiemo Seufer if (v != l->value) 1824e6a05feSThiemo Seufer goto out_danger; 1834e6a05feSThiemo Seufer 1844e6a05feSThiemo Seufer /* 1854e6a05feSThiemo Seufer * Do the HI16 relocation. Note that we actually don't 1864e6a05feSThiemo Seufer * need to know anything about the LO16 itself, except 1874e6a05feSThiemo Seufer * where to find the low 16 bits of the addend needed 1884e6a05feSThiemo Seufer * by the LO16. 1894e6a05feSThiemo Seufer */ 1904e6a05feSThiemo Seufer insn = *l->addr; 1914e6a05feSThiemo Seufer val = ((insn & 0xffff) << 16) + vallo; 1924e6a05feSThiemo Seufer val += v; 1934e6a05feSThiemo Seufer 1944e6a05feSThiemo Seufer /* 1954e6a05feSThiemo Seufer * Account for the sign extension that will happen in 1964e6a05feSThiemo Seufer * the low bits. 1974e6a05feSThiemo Seufer */ 1984e6a05feSThiemo Seufer val = ((val >> 16) + ((val & 0x8000) != 0)) & 0xffff; 1994e6a05feSThiemo Seufer 2004e6a05feSThiemo Seufer insn = (insn & ~0xffff) | val; 2014e6a05feSThiemo Seufer *l->addr = insn; 2024e6a05feSThiemo Seufer 2034e6a05feSThiemo Seufer next = l->next; 2044e6a05feSThiemo Seufer kfree(l); 2054e6a05feSThiemo Seufer l = next; 2064e6a05feSThiemo Seufer } 2074e6a05feSThiemo Seufer 2084e6a05feSThiemo Seufer mips_hi16_list = NULL; 2094e6a05feSThiemo Seufer } 2104e6a05feSThiemo Seufer 2114e6a05feSThiemo Seufer /* 2124e6a05feSThiemo Seufer * Ok, we're done with the HI16 relocs. Now deal with the LO16. 2134e6a05feSThiemo Seufer */ 2144e6a05feSThiemo Seufer val = v + vallo; 2154e6a05feSThiemo Seufer insnlo = (insnlo & ~0xffff) | (val & 0xffff); 2164e6a05feSThiemo Seufer *location = insnlo; 2174e6a05feSThiemo Seufer 2184e6a05feSThiemo Seufer return 0; 2194e6a05feSThiemo Seufer 2204e6a05feSThiemo Seufer out_danger: 2216f9fdeb6SRalf Baechle pr_err("module %s: dangerous R_MIPS_LO16 REL relocation\n", me->name); 2224e6a05feSThiemo Seufer 2234e6a05feSThiemo Seufer return -ENOEXEC; 2244e6a05feSThiemo Seufer } 2254e6a05feSThiemo Seufer 2264e6a05feSThiemo Seufer static int apply_r_mips_lo16_rela(struct module *me, u32 *location, Elf_Addr v) 2274e6a05feSThiemo Seufer { 2284e6a05feSThiemo Seufer *location = (*location & 0xffff0000) | (v & 0xffff); 2294e6a05feSThiemo Seufer 2304e6a05feSThiemo Seufer return 0; 2314e6a05feSThiemo Seufer } 2324e6a05feSThiemo Seufer 2334e6a05feSThiemo Seufer static int apply_r_mips_64_rela(struct module *me, u32 *location, Elf_Addr v) 2344e6a05feSThiemo Seufer { 2354e6a05feSThiemo Seufer *(Elf_Addr *)location = v; 2364e6a05feSThiemo Seufer 2374e6a05feSThiemo Seufer return 0; 2384e6a05feSThiemo Seufer } 2394e6a05feSThiemo Seufer 2404e6a05feSThiemo Seufer static int apply_r_mips_higher_rela(struct module *me, u32 *location, 2414e6a05feSThiemo Seufer Elf_Addr v) 2424e6a05feSThiemo Seufer { 2434e6a05feSThiemo Seufer *location = (*location & 0xffff0000) | 2444e6a05feSThiemo Seufer ((((long long) v + 0x80008000LL) >> 32) & 0xffff); 2454e6a05feSThiemo Seufer 2464e6a05feSThiemo Seufer return 0; 2474e6a05feSThiemo Seufer } 2484e6a05feSThiemo Seufer 2494e6a05feSThiemo Seufer static int apply_r_mips_highest_rela(struct module *me, u32 *location, 2504e6a05feSThiemo Seufer Elf_Addr v) 2514e6a05feSThiemo Seufer { 2524e6a05feSThiemo Seufer *location = (*location & 0xffff0000) | 2534e6a05feSThiemo Seufer ((((long long) v + 0x800080008000LL) >> 48) & 0xffff); 2544e6a05feSThiemo Seufer 2554e6a05feSThiemo Seufer return 0; 2564e6a05feSThiemo Seufer } 2574e6a05feSThiemo Seufer 2584e6a05feSThiemo Seufer static int (*reloc_handlers_rel[]) (struct module *me, u32 *location, 2594e6a05feSThiemo Seufer Elf_Addr v) = { 2604e6a05feSThiemo Seufer [R_MIPS_NONE] = apply_r_mips_none, 2614e6a05feSThiemo Seufer [R_MIPS_32] = apply_r_mips_32_rel, 2624e6a05feSThiemo Seufer [R_MIPS_26] = apply_r_mips_26_rel, 2634e6a05feSThiemo Seufer [R_MIPS_HI16] = apply_r_mips_hi16_rel, 2644e6a05feSThiemo Seufer [R_MIPS_LO16] = apply_r_mips_lo16_rel 2654e6a05feSThiemo Seufer }; 2664e6a05feSThiemo Seufer 2674e6a05feSThiemo Seufer static int (*reloc_handlers_rela[]) (struct module *me, u32 *location, 2684e6a05feSThiemo Seufer Elf_Addr v) = { 2694e6a05feSThiemo Seufer [R_MIPS_NONE] = apply_r_mips_none, 2704e6a05feSThiemo Seufer [R_MIPS_32] = apply_r_mips_32_rela, 2714e6a05feSThiemo Seufer [R_MIPS_26] = apply_r_mips_26_rela, 2724e6a05feSThiemo Seufer [R_MIPS_HI16] = apply_r_mips_hi16_rela, 2734e6a05feSThiemo Seufer [R_MIPS_LO16] = apply_r_mips_lo16_rela, 2744e6a05feSThiemo Seufer [R_MIPS_64] = apply_r_mips_64_rela, 2754e6a05feSThiemo Seufer [R_MIPS_HIGHER] = apply_r_mips_higher_rela, 2764e6a05feSThiemo Seufer [R_MIPS_HIGHEST] = apply_r_mips_highest_rela 2774e6a05feSThiemo Seufer }; 2784e6a05feSThiemo Seufer 2794e6a05feSThiemo Seufer int apply_relocate(Elf_Shdr *sechdrs, const char *strtab, 2804e6a05feSThiemo Seufer unsigned int symindex, unsigned int relsec, 2814e6a05feSThiemo Seufer struct module *me) 2824e6a05feSThiemo Seufer { 2834e6a05feSThiemo Seufer Elf_Mips_Rel *rel = (void *) sechdrs[relsec].sh_addr; 2844e6a05feSThiemo Seufer Elf_Sym *sym; 2854e6a05feSThiemo Seufer u32 *location; 2864e6a05feSThiemo Seufer unsigned int i; 2874e6a05feSThiemo Seufer Elf_Addr v; 2884e6a05feSThiemo Seufer int res; 2894e6a05feSThiemo Seufer 2904e6a05feSThiemo Seufer pr_debug("Applying relocate section %u to %u\n", relsec, 2914e6a05feSThiemo Seufer sechdrs[relsec].sh_info); 2924e6a05feSThiemo Seufer 2934e6a05feSThiemo Seufer for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { 2944e6a05feSThiemo Seufer /* This is where to make the change */ 2954e6a05feSThiemo Seufer location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr 2964e6a05feSThiemo Seufer + rel[i].r_offset; 2974e6a05feSThiemo Seufer /* This is the symbol it is referring to */ 2984e6a05feSThiemo Seufer sym = (Elf_Sym *)sechdrs[symindex].sh_addr 2994e6a05feSThiemo Seufer + ELF_MIPS_R_SYM(rel[i]); 3000e66fff8SGabor Juhos if (IS_ERR_VALUE(sym->st_value)) { 301f3bf07b9SAtsushi Nemoto /* Ignore unresolved weak symbol */ 302f3bf07b9SAtsushi Nemoto if (ELF_ST_BIND(sym->st_info) == STB_WEAK) 303f3bf07b9SAtsushi Nemoto continue; 3044e6a05feSThiemo Seufer printk(KERN_WARNING "%s: Unknown symbol %s\n", 3054e6a05feSThiemo Seufer me->name, strtab + sym->st_name); 3064e6a05feSThiemo Seufer return -ENOENT; 3074e6a05feSThiemo Seufer } 3084e6a05feSThiemo Seufer 3094e6a05feSThiemo Seufer v = sym->st_value; 3104e6a05feSThiemo Seufer 3114e6a05feSThiemo Seufer res = reloc_handlers_rel[ELF_MIPS_R_TYPE(rel[i])](me, location, v); 3124e6a05feSThiemo Seufer if (res) 3134e6a05feSThiemo Seufer return res; 3144e6a05feSThiemo Seufer } 3154e6a05feSThiemo Seufer 3164e6a05feSThiemo Seufer return 0; 3174e6a05feSThiemo Seufer } 3184e6a05feSThiemo Seufer 3194e6a05feSThiemo Seufer int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, 3204e6a05feSThiemo Seufer unsigned int symindex, unsigned int relsec, 3214e6a05feSThiemo Seufer struct module *me) 3224e6a05feSThiemo Seufer { 3234e6a05feSThiemo Seufer Elf_Mips_Rela *rel = (void *) sechdrs[relsec].sh_addr; 3244e6a05feSThiemo Seufer Elf_Sym *sym; 3254e6a05feSThiemo Seufer u32 *location; 3264e6a05feSThiemo Seufer unsigned int i; 3274e6a05feSThiemo Seufer Elf_Addr v; 3284e6a05feSThiemo Seufer int res; 3294e6a05feSThiemo Seufer 3304e6a05feSThiemo Seufer pr_debug("Applying relocate section %u to %u\n", relsec, 3314e6a05feSThiemo Seufer sechdrs[relsec].sh_info); 3324e6a05feSThiemo Seufer 3334e6a05feSThiemo Seufer for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { 3344e6a05feSThiemo Seufer /* This is where to make the change */ 3354e6a05feSThiemo Seufer location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr 3364e6a05feSThiemo Seufer + rel[i].r_offset; 3374e6a05feSThiemo Seufer /* This is the symbol it is referring to */ 3384e6a05feSThiemo Seufer sym = (Elf_Sym *)sechdrs[symindex].sh_addr 3394e6a05feSThiemo Seufer + ELF_MIPS_R_SYM(rel[i]); 3400e66fff8SGabor Juhos if (IS_ERR_VALUE(sym->st_value)) { 341f3bf07b9SAtsushi Nemoto /* Ignore unresolved weak symbol */ 342f3bf07b9SAtsushi Nemoto if (ELF_ST_BIND(sym->st_info) == STB_WEAK) 343f3bf07b9SAtsushi Nemoto continue; 3444e6a05feSThiemo Seufer printk(KERN_WARNING "%s: Unknown symbol %s\n", 3454e6a05feSThiemo Seufer me->name, strtab + sym->st_name); 3464e6a05feSThiemo Seufer return -ENOENT; 3474e6a05feSThiemo Seufer } 3484e6a05feSThiemo Seufer 3494e6a05feSThiemo Seufer v = sym->st_value + rel[i].r_addend; 3504e6a05feSThiemo Seufer 3514e6a05feSThiemo Seufer res = reloc_handlers_rela[ELF_MIPS_R_TYPE(rel[i])](me, location, v); 3524e6a05feSThiemo Seufer if (res) 3534e6a05feSThiemo Seufer return res; 3544e6a05feSThiemo Seufer } 3554e6a05feSThiemo Seufer 3564e6a05feSThiemo Seufer return 0; 3574e6a05feSThiemo Seufer } 3584e6a05feSThiemo Seufer 3591da177e4SLinus Torvalds /* Given an address, look for it in the module exception tables. */ 3601da177e4SLinus Torvalds const struct exception_table_entry *search_module_dbetables(unsigned long addr) 3611da177e4SLinus Torvalds { 3621da177e4SLinus Torvalds unsigned long flags; 3631da177e4SLinus Torvalds const struct exception_table_entry *e = NULL; 3641da177e4SLinus Torvalds struct mod_arch_specific *dbe; 3651da177e4SLinus Torvalds 3661da177e4SLinus Torvalds spin_lock_irqsave(&dbe_lock, flags); 3671da177e4SLinus Torvalds list_for_each_entry(dbe, &dbe_list, dbe_list) { 3681da177e4SLinus Torvalds e = search_extable(dbe->dbe_start, dbe->dbe_end - 1, addr); 3691da177e4SLinus Torvalds if (e) 3701da177e4SLinus Torvalds break; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds spin_unlock_irqrestore(&dbe_lock, flags); 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds /* Now, if we found one, we are running inside it now, hence 3751da177e4SLinus Torvalds we cannot unload the module, hence no refcnt needed. */ 3761da177e4SLinus Torvalds return e; 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds 3793a4fa0a2SRobert P. J. Day /* Put in dbe list if necessary. */ 3801da177e4SLinus Torvalds int module_finalize(const Elf_Ehdr *hdr, 3811da177e4SLinus Torvalds const Elf_Shdr *sechdrs, 3821da177e4SLinus Torvalds struct module *me) 3831da177e4SLinus Torvalds { 3841da177e4SLinus Torvalds const Elf_Shdr *s; 3851da177e4SLinus Torvalds char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; 3861da177e4SLinus Torvalds 38794bb0c1aSDavid Daney /* Make jump label nops. */ 38894bb0c1aSDavid Daney jump_label_apply_nops(me); 38994bb0c1aSDavid Daney 3901da177e4SLinus Torvalds INIT_LIST_HEAD(&me->arch.dbe_list); 3911da177e4SLinus Torvalds for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) { 3921da177e4SLinus Torvalds if (strcmp("__dbe_table", secstrings + s->sh_name) != 0) 3931da177e4SLinus Torvalds continue; 3941da177e4SLinus Torvalds me->arch.dbe_start = (void *)s->sh_addr; 3951da177e4SLinus Torvalds me->arch.dbe_end = (void *)s->sh_addr + s->sh_size; 3961da177e4SLinus Torvalds spin_lock_irq(&dbe_lock); 3971da177e4SLinus Torvalds list_add(&me->arch.dbe_list, &dbe_list); 3981da177e4SLinus Torvalds spin_unlock_irq(&dbe_lock); 3991da177e4SLinus Torvalds } 4001da177e4SLinus Torvalds return 0; 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds void module_arch_cleanup(struct module *mod) 4041da177e4SLinus Torvalds { 4051da177e4SLinus Torvalds spin_lock_irq(&dbe_lock); 4061da177e4SLinus Torvalds list_del(&mod->arch.dbe_list); 4071da177e4SLinus Torvalds spin_unlock_irq(&dbe_lock); 4081da177e4SLinus Torvalds } 409