Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | Upstream-Status: Inappropriate [embedded specific] |
| 2 | |
| 3 | We run the ldconfig in the cross fashion. make the code bitsize aware so that |
| 4 | we can cross build ldconfig cache for various architectures. |
| 5 | |
| 6 | Richard Purdie <richard.purdie@linuxfoundation.org> 2009/05/19 |
| 7 | Nitin A Kamble <nitin.a.kamble@intel.com> 2009/03/29 |
| 8 | |
| 9 | Index: ldconfig-native-2.12.1/readelflib.c |
| 10 | =================================================================== |
| 11 | --- ldconfig-native-2.12.1.orig/readelflib.c |
| 12 | +++ ldconfig-native-2.12.1/readelflib.c |
| 13 | @@ -40,39 +40,212 @@ do \ |
| 14 | |
| 15 | /* Returns 0 if everything is ok, != 0 in case of error. */ |
| 16 | int |
| 17 | -process_elf_file (const char *file_name, const char *lib, int *flag, |
| 18 | +process_elf_file32 (const char *file_name, const char *lib, int *flag, |
| 19 | unsigned int *osversion, char **soname, void *file_contents, |
| 20 | size_t file_length) |
| 21 | { |
| 22 | int i; |
| 23 | unsigned int j; |
| 24 | - ElfW(Addr) loadaddr; |
| 25 | + Elf32_Addr loadaddr; |
| 26 | unsigned int dynamic_addr; |
| 27 | size_t dynamic_size; |
| 28 | char *program_interpreter; |
| 29 | |
| 30 | - ElfW(Ehdr) *elf_header; |
| 31 | - ElfW(Phdr) *elf_pheader, *segment; |
| 32 | - ElfW(Dyn) *dynamic_segment, *dyn_entry; |
| 33 | + Elf32_Ehdr *elf_header; |
| 34 | + Elf32_Phdr *elf_pheader, *segment; |
| 35 | + Elf32_Dyn *dynamic_segment, *dyn_entry; |
| 36 | char *dynamic_strings; |
| 37 | |
| 38 | - elf_header = (ElfW(Ehdr) *) file_contents; |
| 39 | + elf_header = (Elf32_Ehdr *) file_contents; |
| 40 | *osversion = 0; |
| 41 | |
| 42 | - if (elf_header->e_ident [EI_CLASS] != ElfW (CLASS)) |
| 43 | + if (elf_header->e_type != ET_DYN) |
| 44 | { |
| 45 | - if (opt_verbose) |
| 46 | + error (0, 0, _("%s is not a shared object file (Type: %d).\n"), file_name, |
| 47 | + elf_header->e_type); |
| 48 | + return 1; |
| 49 | + } |
| 50 | + |
| 51 | + /* Get information from elf program header. */ |
| 52 | + elf_pheader = (Elf32_Phdr *) (elf_header->e_phoff + file_contents); |
| 53 | + check_ptr (elf_pheader); |
| 54 | + |
| 55 | + /* The library is an elf library, now search for soname and |
| 56 | + libc5/libc6. */ |
| 57 | + *flag = FLAG_ELF; |
| 58 | + |
| 59 | + loadaddr = -1; |
| 60 | + dynamic_addr = 0; |
| 61 | + dynamic_size = 0; |
| 62 | + program_interpreter = NULL; |
| 63 | + for (i = 0, segment = elf_pheader; |
| 64 | + i < elf_header->e_phnum; i++, segment++) |
| 65 | + { |
| 66 | + check_ptr (segment); |
| 67 | + |
| 68 | + switch (segment->p_type) |
| 69 | { |
| 70 | - if (elf_header->e_ident [EI_CLASS] == ELFCLASS32) |
| 71 | - error (0, 0, _("%s is a 32 bit ELF file.\n"), file_name); |
| 72 | - else if (elf_header->e_ident [EI_CLASS] == ELFCLASS64) |
| 73 | - error (0, 0, _("%s is a 64 bit ELF file.\n"), file_name); |
| 74 | - else |
| 75 | - error (0, 0, _("Unknown ELFCLASS in file %s.\n"), file_name); |
| 76 | + case PT_LOAD: |
| 77 | + if (loadaddr == (Elf32_Addr) -1) |
| 78 | + loadaddr = segment->p_vaddr - segment->p_offset; |
| 79 | + break; |
| 80 | + |
| 81 | + case PT_DYNAMIC: |
| 82 | + if (dynamic_addr) |
| 83 | + error (0, 0, _("more than one dynamic segment\n")); |
| 84 | + |
| 85 | + dynamic_addr = segment->p_offset; |
| 86 | + dynamic_size = segment->p_filesz; |
| 87 | + break; |
| 88 | + |
| 89 | + case PT_INTERP: |
| 90 | + program_interpreter = (char *) (file_contents + segment->p_offset); |
| 91 | + check_ptr (program_interpreter); |
| 92 | + |
| 93 | + /* Check if this is enough to classify the binary. */ |
| 94 | + for (j = 0; j < sizeof (interpreters) / sizeof (interpreters [0]); |
| 95 | + ++j) |
| 96 | + if (strcmp (program_interpreter, interpreters[j].soname) == 0) |
| 97 | + { |
| 98 | + *flag = interpreters[j].flag; |
| 99 | + break; |
| 100 | + } |
| 101 | + break; |
| 102 | + |
| 103 | + case PT_NOTE: |
| 104 | + if (!*osversion && segment->p_filesz >= 32 && segment->p_align >= 4) |
| 105 | + { |
| 106 | + Elf32_Word *abi_note = (Elf32_Word *) (file_contents |
| 107 | + + segment->p_offset); |
| 108 | + Elf32_Addr size = segment->p_filesz; |
| 109 | + |
| 110 | + while (abi_note [0] != 4 || abi_note [1] != 16 |
| 111 | + || abi_note [2] != 1 |
| 112 | + || memcmp (abi_note + 3, "GNU", 4) != 0) |
| 113 | + { |
| 114 | +#define ROUND(len) (((len) + sizeof (Elf32_Word)) - 1) & -sizeof (Elf32_Word))) |
| 115 | + Elf32_Addr) note_size = 3 * sizeof (Elf32_Word)) |
| 116 | + + ROUND (abi_note[0]) |
| 117 | + + ROUND (abi_note[1]); |
| 118 | + |
| 119 | + if (size - 32 < note_size || note_size == 0) |
| 120 | + { |
| 121 | + size = 0; |
| 122 | + break; |
| 123 | + } |
| 124 | + size -= note_size; |
| 125 | + abi_note = (void *) abi_note + note_size; |
| 126 | + } |
| 127 | + |
| 128 | + if (size == 0) |
| 129 | + break; |
| 130 | + |
| 131 | + *osversion = (abi_note [4] << 24) | |
| 132 | + ((abi_note [5] & 0xff) << 16) | |
| 133 | + ((abi_note [6] & 0xff) << 8) | |
| 134 | + (abi_note [7] & 0xff); |
| 135 | + } |
| 136 | + break; |
| 137 | + |
| 138 | + default: |
| 139 | + break; |
| 140 | + } |
| 141 | + |
| 142 | + } |
| 143 | + if (loadaddr == (Elf32_Addr) -1) |
| 144 | + { |
| 145 | + /* Very strange. */ |
| 146 | + loadaddr = 0; |
| 147 | + } |
| 148 | + |
| 149 | + /* Now we can read the dynamic sections. */ |
| 150 | + if (dynamic_size == 0) |
| 151 | + return 1; |
| 152 | + |
| 153 | + dynamic_segment = (Elf32_Dyn *) (file_contents + dynamic_addr); |
| 154 | + check_ptr (dynamic_segment); |
| 155 | + |
| 156 | + /* Find the string table. */ |
| 157 | + dynamic_strings = NULL; |
| 158 | + for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL; |
| 159 | + ++dyn_entry) |
| 160 | + { |
| 161 | + check_ptr (dyn_entry); |
| 162 | + if (dyn_entry->d_tag == DT_STRTAB) |
| 163 | + { |
| 164 | + dynamic_strings = (char *) (file_contents + dyn_entry->d_un.d_val - loadaddr); |
| 165 | + check_ptr (dynamic_strings); |
| 166 | + break; |
| 167 | } |
| 168 | - return 1; |
| 169 | } |
| 170 | |
| 171 | + if (dynamic_strings == NULL) |
| 172 | + return 1; |
| 173 | + |
| 174 | + /* Now read the DT_NEEDED and DT_SONAME entries. */ |
| 175 | + for (dyn_entry = dynamic_segment; dyn_entry->d_tag != DT_NULL; |
| 176 | + ++dyn_entry) |
| 177 | + { |
| 178 | + if (dyn_entry->d_tag == DT_NEEDED || dyn_entry->d_tag == DT_SONAME) |
| 179 | + { |
| 180 | + char *name = dynamic_strings + dyn_entry->d_un.d_val; |
| 181 | + check_ptr (name); |
| 182 | + |
| 183 | + if (dyn_entry->d_tag == DT_NEEDED) |
| 184 | + { |
| 185 | + |
| 186 | + if (*flag == FLAG_ELF) |
| 187 | + { |
| 188 | + /* Check if this is enough to classify the binary. */ |
| 189 | + for (j = 0; |
| 190 | + j < sizeof (known_libs) / sizeof (known_libs [0]); |
| 191 | + ++j) |
| 192 | + if (strcmp (name, known_libs [j].soname) == 0) |
| 193 | + { |
| 194 | + *flag = known_libs [j].flag; |
| 195 | + break; |
| 196 | + } |
| 197 | + } |
| 198 | + } |
| 199 | + |
| 200 | + else if (dyn_entry->d_tag == DT_SONAME) |
| 201 | + *soname = xstrdup (name); |
| 202 | + |
| 203 | + /* Do we have everything we need? */ |
| 204 | + if (*soname && *flag != FLAG_ELF) |
| 205 | + return 0; |
| 206 | + } |
| 207 | + } |
| 208 | + |
| 209 | + /* We reach this point only if the file doesn't contain a DT_SONAME |
| 210 | + or if we can't classify the library. If it doesn't have a |
| 211 | + soname, return the name of the library. */ |
| 212 | + if (*soname == NULL) |
| 213 | + *soname = xstrdup (lib); |
| 214 | + |
| 215 | + return 0; |
| 216 | +} |
| 217 | + |
| 218 | +int |
| 219 | +process_elf_file64 (const char *file_name, const char *lib, int *flag, |
| 220 | + unsigned int *osversion, char **soname, void *file_contents, |
| 221 | + size_t file_length) |
| 222 | +{ |
| 223 | + int i; |
| 224 | + unsigned int j; |
| 225 | + Elf64_Addr loadaddr; |
| 226 | + unsigned int dynamic_addr; |
| 227 | + size_t dynamic_size; |
| 228 | + char *program_interpreter; |
| 229 | + |
| 230 | + Elf64_Ehdr *elf_header; |
| 231 | + Elf64_Phdr *elf_pheader, *segment; |
| 232 | + Elf64_Dyn *dynamic_segment, *dyn_entry; |
| 233 | + char *dynamic_strings; |
| 234 | + |
| 235 | + elf_header = (Elf64_Ehdr *) file_contents; |
| 236 | + *osversion = 0; |
| 237 | + |
| 238 | if (elf_header->e_type != ET_DYN) |
| 239 | { |
| 240 | error (0, 0, _("%s is not a shared object file (Type: %d).\n"), file_name, |
| 241 | @@ -81,7 +254,7 @@ process_elf_file (const char *file_name, |
| 242 | } |
| 243 | |
| 244 | /* Get information from elf program header. */ |
| 245 | - elf_pheader = (ElfW(Phdr) *) (elf_header->e_phoff + file_contents); |
| 246 | + elf_pheader = (Elf64_Phdr *) (elf_header->e_phoff + file_contents); |
| 247 | check_ptr (elf_pheader); |
| 248 | |
| 249 | /* The library is an elf library, now search for soname and |
| 250 | @@ -100,7 +273,7 @@ process_elf_file (const char *file_name, |
| 251 | switch (segment->p_type) |
| 252 | { |
| 253 | case PT_LOAD: |
| 254 | - if (loadaddr == (ElfW(Addr)) -1) |
| 255 | + if (loadaddr == (Elf64_Addr) -1) |
| 256 | loadaddr = segment->p_vaddr - segment->p_offset; |
| 257 | break; |
| 258 | |
| 259 | @@ -129,16 +302,16 @@ process_elf_file (const char *file_name, |
| 260 | case PT_NOTE: |
| 261 | if (!*osversion && segment->p_filesz >= 32 && segment->p_align >= 4) |
| 262 | { |
| 263 | - ElfW(Word) *abi_note = (ElfW(Word) *) (file_contents |
| 264 | + Elf64_Word *abi_note = (Elf64_Word *) (file_contents |
| 265 | + segment->p_offset); |
| 266 | - ElfW(Addr) size = segment->p_filesz; |
| 267 | + Elf64_Addr size = segment->p_filesz; |
| 268 | |
| 269 | while (abi_note [0] != 4 || abi_note [1] != 16 |
| 270 | || abi_note [2] != 1 |
| 271 | || memcmp (abi_note + 3, "GNU", 4) != 0) |
| 272 | { |
| 273 | -#define ROUND(len) (((len) + sizeof (ElfW(Word)) - 1) & -sizeof (ElfW(Word))) |
| 274 | - ElfW(Addr) note_size = 3 * sizeof (ElfW(Word)) |
| 275 | +#define ROUND(len) (((len) + sizeof (Elf64_Word) - 1) & -sizeof (Elf64_Word)) |
| 276 | + Elf64_Addr note_size = 3 * sizeof (Elf64_Word) |
| 277 | + ROUND (abi_note[0]) |
| 278 | + ROUND (abi_note[1]); |
| 279 | |
| 280 | @@ -166,7 +339,7 @@ process_elf_file (const char *file_name, |
| 281 | } |
| 282 | |
| 283 | } |
| 284 | - if (loadaddr == (ElfW(Addr)) -1) |
| 285 | + if (loadaddr == (Elf64_Addr) -1) |
| 286 | { |
| 287 | /* Very strange. */ |
| 288 | loadaddr = 0; |
| 289 | @@ -176,7 +349,7 @@ process_elf_file (const char *file_name, |
| 290 | if (dynamic_size == 0) |
| 291 | return 1; |
| 292 | |
| 293 | - dynamic_segment = (ElfW(Dyn) *) (file_contents + dynamic_addr); |
| 294 | + dynamic_segment = (Elf64_Dyn *) (file_contents + dynamic_addr); |
| 295 | check_ptr (dynamic_segment); |
| 296 | |
| 297 | /* Find the string table. */ |
| 298 | @@ -233,3 +406,33 @@ process_elf_file (const char *file_name, |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | +/* Returns 0 if everything is ok, != 0 in case of error. */ |
| 303 | +int |
| 304 | +process_elf_file (const char *file_name, const char *lib, int *flag, |
| 305 | + unsigned int *osversion, char **soname, void *file_contents, |
| 306 | + size_t file_length) |
| 307 | +{ |
| 308 | + int i; |
| 309 | + unsigned int j; |
| 310 | + ElfW(Addr) loadaddr; |
| 311 | + unsigned int dynamic_addr; |
| 312 | + size_t dynamic_size; |
| 313 | + char *program_interpreter; |
| 314 | + |
| 315 | + ElfW(Ehdr) *elf_header; |
| 316 | + ElfW(Phdr) *elf_pheader, *segment; |
| 317 | + ElfW(Dyn) *dynamic_segment, *dyn_entry; |
| 318 | + char *dynamic_strings; |
| 319 | + |
| 320 | + elf_header = (ElfW(Ehdr) *) file_contents; |
| 321 | + *osversion = 0; |
| 322 | + |
| 323 | + if (elf_header->e_ident [EI_CLASS] == ELFCLASS32) |
| 324 | + return process_elf_file32(file_name, lib,flag, osversion, soname, file_contents, file_length); |
| 325 | + else if (elf_header->e_ident [EI_CLASS] == ELFCLASS64) |
| 326 | + return process_elf_file64(file_name, lib,flag, osversion, soname, file_contents, file_length); |
| 327 | + error (0, 0, _("Unknown ELFCLASS in file %s.\n"), file_name); |
| 328 | + return 1; |
| 329 | +} |
| 330 | + |
| 331 | + |