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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | /* Kernel module help for SH. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/moduleloader.h> #include <linux/elf.h> #include <linux/vmalloc.h> #include <linux/fs.h> #include <linux/string.h> #include <linux/kernel.h> #if 0 #define DEBUGP printk #else #define DEBUGP(fmt...) #endif void *module_alloc(unsigned long size) { if (size == 0) return NULL; return vmalloc(size); } /* Free memory returned from module_alloc */ void module_free(struct module *mod, void *module_region) { vfree(module_region); /* FIXME: If module_region == mod->init_region, trim exception table entries. */ } /* We don't need anything special. */ int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings, struct module *mod) { return 0; } #define COPY_UNALIGNED_WORD(sw, tw, align) \ { \ void *__s = &(sw), *__t = &(tw); \ unsigned short *__s2 = __s, *__t2 = __t; \ unsigned char *__s1 = __s, *__t1 = __t; \ switch ((align)) \ { \ case 0: \ *(unsigned long *) __t = *(unsigned long *) __s; \ break; \ case 2: \ *__t2++ = *__s2++; \ *__t2 = *__s2; \ break; \ default: \ *__t1++ = *__s1++; \ *__t1++ = *__s1++; \ *__t1++ = *__s1++; \ *__t1 = *__s1; \ break; \ } \ } int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relsec, struct module *me) { unsigned int i; Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; Elf32_Sym *sym; Elf32_Addr relocation; uint32_t *location; uint32_t value; int align; DEBUGP("Applying relocate section %u to %u\n", relsec, sechdrs[relsec].sh_info); for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { /* This is where to make the change */ location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + rel[i].r_offset; /* This is the symbol it is referring to. Note that all undefined symbols have been resolved. */ sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + ELF32_R_SYM(rel[i].r_info); relocation = sym->st_value + rel[i].r_addend; align = (int)location & 3; switch (ELF32_R_TYPE(rel[i].r_info)) { case R_SH_DIR32: COPY_UNALIGNED_WORD (*location, value, align); value += relocation; COPY_UNALIGNED_WORD (value, *location, align); break; case R_SH_REL32: relocation = (relocation - (Elf32_Addr) location); COPY_UNALIGNED_WORD (*location, value, align); value += relocation; COPY_UNALIGNED_WORD (value, *location, align); break; default: printk(KERN_ERR "module %s: Unknown relocation: %u\n", me->name, ELF32_R_TYPE(rel[i].r_info)); return -ENOEXEC; } } return 0; } int apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relsec, struct module *me) { printk(KERN_ERR "module %s: REL RELOCATION unsupported\n", me->name); return -ENOEXEC; } int module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { return 0; } void module_arch_cleanup(struct module *mod) { } |