1 static void glue(bswap_ehdr, SZ)(struct elfhdr *ehdr) 2 { 3 bswap16s(&ehdr->e_type); /* Object file type */ 4 bswap16s(&ehdr->e_machine); /* Architecture */ 5 bswap32s(&ehdr->e_version); /* Object file version */ 6 bswapSZs(&ehdr->e_entry); /* Entry point virtual address */ 7 bswapSZs(&ehdr->e_phoff); /* Program header table file offset */ 8 bswapSZs(&ehdr->e_shoff); /* Section header table file offset */ 9 bswap32s(&ehdr->e_flags); /* Processor-specific flags */ 10 bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ 11 bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ 12 bswap16s(&ehdr->e_phnum); /* Program header table entry count */ 13 bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ 14 bswap16s(&ehdr->e_shnum); /* Section header table entry count */ 15 bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ 16 } 17 18 static void glue(bswap_phdr, SZ)(struct elf_phdr *phdr) 19 { 20 bswap32s(&phdr->p_type); /* Segment type */ 21 bswapSZs(&phdr->p_offset); /* Segment file offset */ 22 bswapSZs(&phdr->p_vaddr); /* Segment virtual address */ 23 bswapSZs(&phdr->p_paddr); /* Segment physical address */ 24 bswapSZs(&phdr->p_filesz); /* Segment size in file */ 25 bswapSZs(&phdr->p_memsz); /* Segment size in memory */ 26 bswap32s(&phdr->p_flags); /* Segment flags */ 27 bswapSZs(&phdr->p_align); /* Segment alignment */ 28 } 29 30 static void glue(bswap_shdr, SZ)(struct elf_shdr *shdr) 31 { 32 bswap32s(&shdr->sh_name); 33 bswap32s(&shdr->sh_type); 34 bswapSZs(&shdr->sh_flags); 35 bswapSZs(&shdr->sh_addr); 36 bswapSZs(&shdr->sh_offset); 37 bswapSZs(&shdr->sh_size); 38 bswap32s(&shdr->sh_link); 39 bswap32s(&shdr->sh_info); 40 bswapSZs(&shdr->sh_addralign); 41 bswapSZs(&shdr->sh_entsize); 42 } 43 44 static void glue(bswap_sym, SZ)(struct elf_sym *sym) 45 { 46 bswap32s(&sym->st_name); 47 bswapSZs(&sym->st_value); 48 bswapSZs(&sym->st_size); 49 bswap16s(&sym->st_shndx); 50 } 51 52 static struct elf_shdr *glue(find_section, SZ)(struct elf_shdr *shdr_table, 53 int n, int type) 54 { 55 int i; 56 for(i=0;i<n;i++) { 57 if (shdr_table[i].sh_type == type) 58 return shdr_table + i; 59 } 60 return NULL; 61 } 62 63 static int glue(symfind, SZ)(const void *s0, const void *s1) 64 { 65 struct elf_sym *key = (struct elf_sym *)s0; 66 struct elf_sym *sym = (struct elf_sym *)s1; 67 int result = 0; 68 if (key->st_value < sym->st_value) { 69 result = -1; 70 } else if (key->st_value > sym->st_value + sym->st_size) { 71 result = 1; 72 } 73 return result; 74 } 75 76 static const char *glue(lookup_symbol, SZ)(struct syminfo *s, target_ulong orig_addr) 77 { 78 struct elf_sym *syms = glue(s->disas_symtab.elf, SZ); 79 struct elf_sym key; 80 struct elf_sym *sym; 81 82 key.st_value = orig_addr; 83 84 sym = bsearch(&key, syms, s->disas_num_syms, sizeof(*syms), glue(symfind, SZ)); 85 if (sym != 0) { 86 return s->disas_strtab + sym->st_name; 87 } 88 89 return ""; 90 } 91 92 static int glue(symcmp, SZ)(const void *s0, const void *s1) 93 { 94 struct elf_sym *sym0 = (struct elf_sym *)s0; 95 struct elf_sym *sym1 = (struct elf_sym *)s1; 96 return (sym0->st_value < sym1->st_value) 97 ? -1 98 : ((sym0->st_value > sym1->st_value) ? 1 : 0); 99 } 100 101 static int glue(load_symbols, SZ)(struct elfhdr *ehdr, int fd, int must_swab) 102 { 103 struct elf_shdr *symtab, *strtab, *shdr_table = NULL; 104 struct elf_sym *syms = NULL; 105 struct syminfo *s; 106 int nsyms, i; 107 char *str = NULL; 108 109 shdr_table = load_at(fd, ehdr->e_shoff, 110 sizeof(struct elf_shdr) * ehdr->e_shnum); 111 if (!shdr_table) 112 return -1; 113 114 if (must_swab) { 115 for (i = 0; i < ehdr->e_shnum; i++) { 116 glue(bswap_shdr, SZ)(shdr_table + i); 117 } 118 } 119 120 symtab = glue(find_section, SZ)(shdr_table, ehdr->e_shnum, SHT_SYMTAB); 121 if (!symtab) 122 goto fail; 123 syms = load_at(fd, symtab->sh_offset, symtab->sh_size); 124 if (!syms) 125 goto fail; 126 127 nsyms = symtab->sh_size / sizeof(struct elf_sym); 128 129 i = 0; 130 while (i < nsyms) { 131 if (must_swab) 132 glue(bswap_sym, SZ)(&syms[i]); 133 /* We are only interested in function symbols. 134 Throw everything else away. */ 135 if (syms[i].st_shndx == SHN_UNDEF || 136 syms[i].st_shndx >= SHN_LORESERVE || 137 ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { 138 nsyms--; 139 if (i < nsyms) { 140 syms[i] = syms[nsyms]; 141 } 142 continue; 143 } 144 #if defined(TARGET_ARM) || defined (TARGET_MIPS) 145 /* The bottom address bit marks a Thumb or MIPS16 symbol. */ 146 syms[i].st_value &= ~(target_ulong)1; 147 #endif 148 i++; 149 } 150 syms = qemu_realloc(syms, nsyms * sizeof(*syms)); 151 152 qsort(syms, nsyms, sizeof(*syms), glue(symcmp, SZ)); 153 154 /* String table */ 155 if (symtab->sh_link >= ehdr->e_shnum) 156 goto fail; 157 strtab = &shdr_table[symtab->sh_link]; 158 159 str = load_at(fd, strtab->sh_offset, strtab->sh_size); 160 if (!str) 161 goto fail; 162 163 /* Commit */ 164 s = qemu_mallocz(sizeof(*s)); 165 s->lookup_symbol = glue(lookup_symbol, SZ); 166 glue(s->disas_symtab.elf, SZ) = syms; 167 s->disas_num_syms = nsyms; 168 s->disas_strtab = str; 169 s->next = syminfos; 170 syminfos = s; 171 qemu_free(shdr_table); 172 return 0; 173 fail: 174 qemu_free(syms); 175 qemu_free(str); 176 qemu_free(shdr_table); 177 return -1; 178 } 179 180 static int glue(load_elf, SZ)(int fd, int64_t address_offset, 181 int must_swab, uint64_t *pentry, 182 uint64_t *lowaddr, uint64_t *highaddr) 183 { 184 struct elfhdr ehdr; 185 struct elf_phdr *phdr = NULL, *ph; 186 int size, i, total_size; 187 elf_word mem_size; 188 uint64_t addr, low = (uint64_t)-1, high = 0; 189 uint8_t *data = NULL; 190 191 if (read(fd, &ehdr, sizeof(ehdr)) != sizeof(ehdr)) 192 goto fail; 193 if (must_swab) { 194 glue(bswap_ehdr, SZ)(&ehdr); 195 } 196 197 switch (ELF_MACHINE) { 198 case EM_PPC64: 199 if (EM_PPC64 != ehdr.e_machine) 200 if (EM_PPC != ehdr.e_machine) 201 goto fail; 202 break; 203 case EM_X86_64: 204 if (EM_X86_64 != ehdr.e_machine) 205 if (EM_386 != ehdr.e_machine) 206 goto fail; 207 break; 208 default: 209 if (ELF_MACHINE != ehdr.e_machine) 210 goto fail; 211 } 212 213 if (pentry) 214 *pentry = (uint64_t)(elf_sword)ehdr.e_entry; 215 216 glue(load_symbols, SZ)(&ehdr, fd, must_swab); 217 218 size = ehdr.e_phnum * sizeof(phdr[0]); 219 lseek(fd, ehdr.e_phoff, SEEK_SET); 220 phdr = qemu_mallocz(size); 221 if (!phdr) 222 goto fail; 223 if (read(fd, phdr, size) != size) 224 goto fail; 225 if (must_swab) { 226 for(i = 0; i < ehdr.e_phnum; i++) { 227 ph = &phdr[i]; 228 glue(bswap_phdr, SZ)(ph); 229 } 230 } 231 232 total_size = 0; 233 for(i = 0; i < ehdr.e_phnum; i++) { 234 ph = &phdr[i]; 235 if (ph->p_type == PT_LOAD) { 236 mem_size = ph->p_memsz; 237 /* XXX: avoid allocating */ 238 data = qemu_mallocz(mem_size); 239 if (ph->p_filesz > 0) { 240 if (lseek(fd, ph->p_offset, SEEK_SET) < 0) 241 goto fail; 242 if (read(fd, data, ph->p_filesz) != ph->p_filesz) 243 goto fail; 244 } 245 /* address_offset is hack for kernel images that are 246 linked at the wrong physical address. */ 247 addr = ph->p_paddr + address_offset; 248 249 cpu_physical_memory_write_rom(addr, data, mem_size); 250 251 total_size += mem_size; 252 if (addr < low) 253 low = addr; 254 if ((addr + mem_size) > high) 255 high = addr + mem_size; 256 257 qemu_free(data); 258 data = NULL; 259 } 260 } 261 qemu_free(phdr); 262 if (lowaddr) 263 *lowaddr = (uint64_t)(elf_sword)low; 264 if (highaddr) 265 *highaddr = (uint64_t)(elf_sword)high; 266 return total_size; 267 fail: 268 qemu_free(data); 269 qemu_free(phdr); 270 return -1; 271 } 272
