Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Test program for elf_update function. |
| 2 | Copyright (C) 2000, 2001, 2002, 2005 Red Hat, Inc. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 3 | This file is part of Red Hat elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| 5 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 6 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by the |
| 8 | Free Software Foundation; version 2 of the License. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 9 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 10 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License along |
| 16 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
Ulrich Drepper | 1e9ef50 | 2006-04-04 22:29:06 +0000 | [diff] [blame] | 17 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 18 | |
| 19 | Red Hat elfutils is an included package of the Open Invention Network. |
| 20 | An included package of the Open Invention Network is a package for which |
| 21 | Open Invention Network licensees cross-license their patents. No patent |
| 22 | license is granted, either expressly or impliedly, by designation as an |
| 23 | included package. Should you wish to participate in the Open Invention |
| 24 | Network licensing program, please visit www.openinventionnetwork.com |
| 25 | <http://www.openinventionnetwork.com>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 26 | |
| 27 | #ifdef HAVE_CONFIG_H |
| 28 | # include <config.h> |
| 29 | #endif |
| 30 | |
| 31 | #include <errno.h> |
| 32 | #include <fcntl.h> |
| 33 | #include <libelf.h> |
| 34 | #include <stdio.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <string.h> |
| 37 | #include <unistd.h> |
| 38 | |
Roland McGrath | d7f8d0c | 2005-11-17 02:32:03 +0000 | [diff] [blame] | 39 | #include ELFUTILS_HEADER(ebl) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 40 | |
| 41 | |
| 42 | int |
| 43 | main (int argc, char *argv[] __attribute__ ((unused))) |
| 44 | { |
| 45 | const char fname[] = "xxx"; |
| 46 | int fd; |
| 47 | Elf *elf; |
| 48 | Elf32_Ehdr *ehdr; |
| 49 | Elf32_Phdr *phdr; |
| 50 | Elf_Scn *scn; |
| 51 | Elf32_Shdr *shdr; |
| 52 | Elf_Data *data; |
| 53 | struct Ebl_Strtab *shst; |
| 54 | struct Ebl_Strent *firstse; |
| 55 | struct Ebl_Strent *secondse; |
| 56 | struct Ebl_Strent *thirdse; |
| 57 | struct Ebl_Strent *fourthse; |
| 58 | struct Ebl_Strent *shstrtabse; |
| 59 | int i; |
| 60 | |
| 61 | fd = open (fname, O_RDWR | O_CREAT | O_TRUNC, 0666); |
| 62 | if (fd == -1) |
| 63 | { |
| 64 | printf ("cannot open `%s': %s\n", fname, strerror (errno)); |
| 65 | exit (1); |
| 66 | } |
| 67 | |
| 68 | elf_version (EV_CURRENT); |
| 69 | |
| 70 | elf_fill (0x42); |
| 71 | |
| 72 | elf = elf_begin (fd, ELF_C_WRITE, NULL); |
| 73 | if (elf == NULL) |
| 74 | { |
| 75 | printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1)); |
| 76 | exit (1); |
| 77 | } |
| 78 | |
| 79 | /* Create an ELF header. */ |
| 80 | ehdr = elf32_newehdr (elf); |
| 81 | if (ehdr == NULL) |
| 82 | { |
| 83 | printf ("cannot create ELF header: %s\n", elf_errmsg (-1)); |
| 84 | exit (1); |
| 85 | } |
| 86 | |
| 87 | /* Print the ELF header values. */ |
| 88 | if (argc > 1) |
| 89 | { |
| 90 | for (i = 0; i < EI_NIDENT; ++i) |
| 91 | printf (" %02x", ehdr->e_ident[i]); |
| 92 | printf ("\ |
| 93 | \ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" |
| 94 | "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" |
| 95 | "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", |
| 96 | ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, |
| 97 | ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, |
| 98 | ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, |
| 99 | ehdr->e_shnum, ehdr->e_shstrndx); |
| 100 | } |
| 101 | |
| 102 | ehdr->e_ident[0] = 42; |
| 103 | ehdr->e_ident[4] = 1; |
| 104 | ehdr->e_ident[5] = 1; |
| 105 | ehdr->e_ident[6] = 2; |
| 106 | ehdr->e_type = ET_EXEC; |
| 107 | ehdr->e_version = 1; |
| 108 | ehdr->e_ehsize = 1; |
| 109 | elf_flagehdr (elf, ELF_C_SET, ELF_F_DIRTY); |
| 110 | |
| 111 | /* Create the program header. */ |
| 112 | phdr = elf32_newphdr (elf, 1); |
| 113 | if (phdr == NULL) |
| 114 | { |
| 115 | printf ("cannot create program header: %s\n", elf_errmsg (-1)); |
| 116 | exit (1); |
| 117 | } |
| 118 | |
| 119 | phdr[0].p_type = PT_PHDR; |
| 120 | elf_flagphdr (elf, ELF_C_SET, ELF_F_DIRTY); |
| 121 | |
| 122 | shst = ebl_strtabinit (true); |
| 123 | |
| 124 | scn = elf_newscn (elf); |
| 125 | if (scn == NULL) |
| 126 | { |
| 127 | printf ("cannot create first section: %s\n", elf_errmsg (-1)); |
| 128 | exit (1); |
| 129 | } |
| 130 | shdr = elf32_getshdr (scn); |
| 131 | if (shdr == NULL) |
| 132 | { |
| 133 | printf ("cannot get header for first section: %s\n", elf_errmsg (-1)); |
| 134 | exit (1); |
| 135 | } |
| 136 | |
| 137 | firstse = ebl_strtabadd (shst, ".first", 0); |
| 138 | |
| 139 | shdr->sh_type = SHT_PROGBITS; |
| 140 | shdr->sh_flags = SHF_ALLOC | SHF_EXECINSTR; |
| 141 | shdr->sh_addr = 0; |
| 142 | shdr->sh_link = 0; |
| 143 | shdr->sh_info = 0; |
| 144 | shdr->sh_entsize = 1; |
| 145 | |
| 146 | data = elf_newdata (scn); |
| 147 | if (data == NULL) |
| 148 | { |
| 149 | printf ("cannot create data first section: %s\n", elf_errmsg (-1)); |
| 150 | exit (1); |
| 151 | } |
| 152 | |
| 153 | data->d_buf = "hello"; |
| 154 | data->d_type = ELF_T_BYTE; |
| 155 | data->d_version = EV_CURRENT; |
| 156 | data->d_size = 5; |
| 157 | data->d_align = 16; |
| 158 | |
| 159 | |
| 160 | scn = elf_newscn (elf); |
| 161 | if (scn == NULL) |
| 162 | { |
| 163 | printf ("cannot create second section: %s\n", elf_errmsg (-1)); |
| 164 | exit (1); |
| 165 | } |
| 166 | shdr = elf32_getshdr (scn); |
| 167 | if (shdr == NULL) |
| 168 | { |
| 169 | printf ("cannot get header for second section: %s\n", elf_errmsg (-1)); |
| 170 | exit (1); |
| 171 | } |
| 172 | |
| 173 | secondse = ebl_strtabadd (shst, ".second", 0); |
| 174 | |
| 175 | shdr->sh_type = SHT_PROGBITS; |
| 176 | shdr->sh_flags = SHF_ALLOC | SHF_WRITE; |
| 177 | shdr->sh_addr = 0; |
| 178 | shdr->sh_link = 0; |
| 179 | shdr->sh_info = 0; |
| 180 | shdr->sh_entsize = 1; |
| 181 | |
| 182 | data = elf_newdata (scn); |
| 183 | if (data == NULL) |
| 184 | { |
| 185 | printf ("cannot create data second section: %s\n", elf_errmsg (-1)); |
| 186 | exit (1); |
| 187 | } |
| 188 | |
| 189 | data->d_buf = "world"; |
| 190 | data->d_type = ELF_T_BYTE; |
| 191 | data->d_version = EV_CURRENT; |
| 192 | data->d_size = 5; |
| 193 | data->d_align = 16; |
| 194 | |
| 195 | |
| 196 | scn = elf_newscn (elf); |
| 197 | if (scn == NULL) |
| 198 | { |
| 199 | printf ("cannot create third section: %s\n", elf_errmsg (-1)); |
| 200 | exit (1); |
| 201 | } |
| 202 | shdr = elf32_getshdr (scn); |
| 203 | if (shdr == NULL) |
| 204 | { |
| 205 | printf ("cannot get header for third section: %s\n", elf_errmsg (-1)); |
| 206 | exit (1); |
| 207 | } |
| 208 | |
| 209 | thirdse = ebl_strtabadd (shst, ".third", 0); |
| 210 | |
| 211 | shdr->sh_type = SHT_PROGBITS; |
| 212 | shdr->sh_flags = SHF_ALLOC | SHF_EXECINSTR; |
| 213 | shdr->sh_addr = 0; |
| 214 | shdr->sh_link = 0; |
| 215 | shdr->sh_info = 0; |
| 216 | shdr->sh_entsize = 1; |
| 217 | |
| 218 | data = elf_newdata (scn); |
| 219 | if (data == NULL) |
| 220 | { |
| 221 | printf ("cannot create data third section: %s\n", elf_errmsg (-1)); |
| 222 | exit (1); |
| 223 | } |
| 224 | |
| 225 | data->d_buf = "!!!!!"; |
| 226 | data->d_type = ELF_T_BYTE; |
| 227 | data->d_version = EV_CURRENT; |
| 228 | data->d_size = 5; |
| 229 | data->d_align = 16; |
| 230 | |
| 231 | |
| 232 | scn = elf_newscn (elf); |
| 233 | if (scn == NULL) |
| 234 | { |
| 235 | printf ("cannot create fourth section: %s\n", elf_errmsg (-1)); |
| 236 | exit (1); |
| 237 | } |
| 238 | shdr = elf32_getshdr (scn); |
| 239 | if (shdr == NULL) |
| 240 | { |
| 241 | printf ("cannot get header for fourth section: %s\n", elf_errmsg (-1)); |
| 242 | exit (1); |
| 243 | } |
| 244 | |
| 245 | fourthse = ebl_strtabadd (shst, ".fourth", 0); |
| 246 | |
| 247 | shdr->sh_type = SHT_NOBITS; |
| 248 | shdr->sh_flags = SHF_ALLOC | SHF_EXECINSTR; |
| 249 | shdr->sh_addr = 0; |
| 250 | shdr->sh_link = 0; |
| 251 | shdr->sh_info = 0; |
| 252 | shdr->sh_entsize = 1; |
| 253 | shdr->sh_size = 100; |
| 254 | |
| 255 | data = elf_newdata (scn); |
| 256 | if (data == NULL) |
| 257 | { |
| 258 | printf ("cannot create data fourth section: %s\n", elf_errmsg (-1)); |
| 259 | exit (1); |
| 260 | } |
| 261 | |
| 262 | data->d_buf = NULL; |
| 263 | data->d_type = ELF_T_BYTE; |
| 264 | data->d_version = EV_CURRENT; |
| 265 | data->d_size = 100; |
| 266 | data->d_align = 16; |
| 267 | |
| 268 | |
| 269 | scn = elf_newscn (elf); |
| 270 | if (scn == NULL) |
| 271 | { |
| 272 | printf ("cannot create SHSTRTAB section: %s\n", elf_errmsg (-1)); |
| 273 | exit (1); |
| 274 | } |
| 275 | shdr = elf32_getshdr (scn); |
| 276 | if (shdr == NULL) |
| 277 | { |
| 278 | printf ("cannot get header for SHSTRTAB section: %s\n", elf_errmsg (-1)); |
| 279 | exit (1); |
| 280 | } |
| 281 | |
| 282 | shstrtabse = ebl_strtabadd (shst, ".shstrtab", 0); |
| 283 | |
| 284 | shdr->sh_type = SHT_STRTAB; |
| 285 | shdr->sh_flags = 0; |
| 286 | shdr->sh_addr = 0; |
| 287 | shdr->sh_link = SHN_UNDEF; |
| 288 | shdr->sh_info = SHN_UNDEF; |
| 289 | shdr->sh_entsize = 1; |
| 290 | |
| 291 | /* We have to store the section index in the ELF header. */ |
| 292 | ehdr->e_shstrndx = elf_ndxscn (scn); |
| 293 | |
| 294 | data = elf_newdata (scn); |
| 295 | if (data == NULL) |
| 296 | { |
| 297 | printf ("cannot create data SHSTRTAB section: %s\n", elf_errmsg (-1)); |
| 298 | exit (1); |
| 299 | } |
| 300 | |
| 301 | /* No more sections, finalize the section header string table. */ |
| 302 | ebl_strtabfinalize (shst, data); |
| 303 | |
| 304 | elf32_getshdr (elf_getscn (elf, 1))->sh_name = ebl_strtaboffset (firstse); |
| 305 | elf32_getshdr (elf_getscn (elf, 2))->sh_name = ebl_strtaboffset (secondse); |
| 306 | elf32_getshdr (elf_getscn (elf, 3))->sh_name = ebl_strtaboffset (thirdse); |
| 307 | elf32_getshdr (elf_getscn (elf, 4))->sh_name = ebl_strtaboffset (fourthse); |
| 308 | shdr->sh_name = ebl_strtaboffset (shstrtabse); |
| 309 | |
| 310 | /* Let the library compute the internal structure information. */ |
| 311 | if (elf_update (elf, ELF_C_NULL) < 0) |
| 312 | { |
| 313 | printf ("failure in elf_update(NULL): %s\n", elf_errmsg (-1)); |
| 314 | exit (1); |
| 315 | } |
| 316 | |
| 317 | ehdr = elf32_getehdr (elf); |
| 318 | |
| 319 | phdr[0].p_offset = ehdr->e_phoff; |
| 320 | phdr[0].p_offset = ehdr->e_phoff; |
| 321 | phdr[0].p_vaddr = ehdr->e_phoff; |
| 322 | phdr[0].p_paddr = ehdr->e_phoff; |
| 323 | phdr[0].p_flags = PF_R | PF_X; |
| 324 | phdr[0].p_filesz = ehdr->e_phnum * elf32_fsize (ELF_T_PHDR, 1, EV_CURRENT); |
| 325 | phdr[0].p_memsz = ehdr->e_phnum * elf32_fsize (ELF_T_PHDR, 1, EV_CURRENT); |
| 326 | phdr[0].p_align = sizeof (Elf32_Word); |
| 327 | |
| 328 | /* Write out the file. */ |
| 329 | if (elf_update (elf, ELF_C_WRITE) < 0) |
| 330 | { |
| 331 | printf ("failure in elf_update(WRITE): %s\n", elf_errmsg (-1)); |
| 332 | exit (1); |
| 333 | } |
| 334 | |
| 335 | /* We don't need the string table anymore. */ |
| 336 | ebl_strtabfree (shst); |
| 337 | |
| 338 | /* And the data allocated in the .shstrtab section. */ |
| 339 | free (data->d_buf); |
| 340 | |
| 341 | /* Print the ELF header values. */ |
| 342 | if (argc > 1) |
| 343 | { |
| 344 | for (i = 0; i < EI_NIDENT; ++i) |
| 345 | printf (" %02x", ehdr->e_ident[i]); |
| 346 | printf ("\ |
| 347 | \ntype = %hu\nmachine = %hu\nversion = %u\nentry = %u\nphoff = %u\n" |
| 348 | "shoff = %u\nflags = %u\nehsize = %hu\nphentsize = %hu\n" |
| 349 | "phnum = %hu\nshentsize = %hu\nshnum = %hu\nshstrndx = %hu\n", |
| 350 | ehdr->e_type, ehdr->e_machine, ehdr->e_version, ehdr->e_entry, |
| 351 | ehdr->e_phoff, ehdr->e_shoff, ehdr->e_flags, ehdr->e_ehsize, |
| 352 | ehdr->e_phentsize, ehdr->e_phnum, ehdr->e_shentsize, |
| 353 | ehdr->e_shnum, ehdr->e_shstrndx); |
| 354 | } |
| 355 | |
| 356 | if (elf_end (elf) != 0) |
| 357 | { |
| 358 | printf ("failure in elf_end: %s\n", elf_errmsg (-1)); |
| 359 | exit (1); |
| 360 | } |
| 361 | |
| 362 | unlink (fname); |
| 363 | |
| 364 | return 0; |
| 365 | } |