Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame^] | 1 | /* Copyright (C) 2002 Red Hat, Inc. |
| 2 | Written by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 3 | |
| 4 | This program is Open Source software; you can redistribute it and/or |
| 5 | modify it under the terms of the Open Software License version 1.0 as |
| 6 | published by the Open Source Initiative. |
| 7 | |
| 8 | You should have received a copy of the Open Software License along |
| 9 | with this program; if not, you may obtain a copy of the Open Software |
| 10 | License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| 11 | by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 12 | 3001 King Ranch Road, Ukiah, CA 95482. */ |
| 13 | |
| 14 | #include <fcntl.h> |
| 15 | #include <libasm.h> |
| 16 | #include <libelf.h> |
| 17 | #include <stdio.h> |
| 18 | #include <string.h> |
| 19 | #include <unistd.h> |
| 20 | |
| 21 | |
| 22 | static const char fname[] = "asm-tst3-out.o"; |
| 23 | |
| 24 | |
| 25 | static const char *scnnames[5] = |
| 26 | { |
| 27 | [0] = "", |
| 28 | [1] = ".data", |
| 29 | [2] = ".strtab", |
| 30 | [3] = ".symtab", |
| 31 | [4] = ".shstrtab" |
| 32 | }; |
| 33 | |
| 34 | |
| 35 | static unsigned int scntypes[5] = |
| 36 | { |
| 37 | [0] = SHT_NULL, |
| 38 | [1] = SHT_PROGBITS, |
| 39 | [2] = SHT_STRTAB, |
| 40 | [3] = SHT_SYMTAB, |
| 41 | [4] = SHT_STRTAB |
| 42 | }; |
| 43 | |
| 44 | |
| 45 | int |
| 46 | main (void) |
| 47 | { |
| 48 | AsmCtx_t *ctx; |
| 49 | AsmScn_t *scn1; |
| 50 | AsmScn_t *scn2; |
| 51 | int result = 0; |
| 52 | int fd; |
| 53 | Elf *elf; |
| 54 | GElf_Ehdr ehdr_mem; |
| 55 | GElf_Ehdr *ehdr; |
| 56 | size_t cnt; |
| 57 | |
| 58 | elf_version (EV_CURRENT); |
| 59 | |
| 60 | ctx = asm_begin (fname, false, EM_386, ELFCLASS32, ELFDATA2LSB); |
| 61 | if (ctx == NULL) |
| 62 | { |
| 63 | printf ("cannot create assembler context: %s\n", asm_errmsg (-1)); |
| 64 | return 1; |
| 65 | } |
| 66 | |
| 67 | /* Create two sections. */ |
| 68 | scn1 = asm_newscn (ctx, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE); |
| 69 | scn2 = asm_newsubscn (scn1, 1); |
| 70 | if (scn1 == NULL || scn2 == NULL) |
| 71 | { |
| 72 | printf ("cannot create section in output file: %s\n", asm_errmsg (-1)); |
| 73 | asm_abort (ctx); |
| 74 | return 1; |
| 75 | } |
| 76 | |
| 77 | /* Special alignment for the .text section. */ |
| 78 | if (asm_align (scn1, 16) != 0) |
| 79 | { |
| 80 | printf ("cannot align .text section: %s\n", asm_errmsg (-1)); |
| 81 | result = 1; |
| 82 | } |
| 83 | |
| 84 | /* Add a few strings with names. */ |
| 85 | if (asm_newsym (scn1, "one", 4, STT_OBJECT, STB_GLOBAL) == NULL) |
| 86 | { |
| 87 | printf ("cannot create first name: %s\n", asm_errmsg (-1)); |
| 88 | result = 1; |
| 89 | } |
| 90 | if (asm_addstrz (scn1, "one", 4) != 0) |
| 91 | { |
| 92 | printf ("cannot insert first string: %s\n", asm_errmsg (-1)); |
| 93 | result = 1; |
| 94 | } |
| 95 | if (asm_newsym (scn2, "three", 6, STT_OBJECT, STB_WEAK) == NULL) |
| 96 | { |
| 97 | printf ("cannot create second name: %s\n", asm_errmsg (-1)); |
| 98 | result = 1; |
| 99 | } |
| 100 | if (asm_addstrz (scn2, "three", 0) != 0) |
| 101 | { |
| 102 | printf ("cannot insert second string: %s\n", asm_errmsg (-1)); |
| 103 | result = 1; |
| 104 | } |
| 105 | if (asm_newsym (scn1, "two", 4, STT_OBJECT, STB_LOCAL) == NULL) |
| 106 | { |
| 107 | printf ("cannot create third name: %s\n", asm_errmsg (-1)); |
| 108 | result = 1; |
| 109 | } |
| 110 | if (asm_addstrz (scn1, "two", 4) != 0) |
| 111 | { |
| 112 | printf ("cannot insert third string: %s\n", asm_errmsg (-1)); |
| 113 | result = 1; |
| 114 | } |
| 115 | |
| 116 | /* Create the output file. */ |
| 117 | if (asm_end (ctx) != 0) |
| 118 | { |
| 119 | printf ("cannot create output file: %s\n", asm_errmsg (-1)); |
| 120 | asm_abort (ctx); |
| 121 | return 1; |
| 122 | } |
| 123 | |
| 124 | /* Check the file. */ |
| 125 | fd = open (fname, O_RDONLY); |
| 126 | if (fd == -1) |
| 127 | { |
| 128 | printf ("cannot open generated file: %m\n"); |
| 129 | result = 1; |
| 130 | goto out; |
| 131 | } |
| 132 | |
| 133 | elf = elf_begin (fd, ELF_C_READ, NULL); |
| 134 | if (elf == NULL) |
| 135 | { |
| 136 | printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1)); |
| 137 | result = 1; |
| 138 | goto out_close; |
| 139 | } |
| 140 | if (elf_kind (elf) != ELF_K_ELF) |
| 141 | { |
| 142 | puts ("not a valid ELF file"); |
| 143 | result = 1; |
| 144 | goto out_close2; |
| 145 | } |
| 146 | |
| 147 | ehdr = gelf_getehdr (elf, &ehdr_mem); |
| 148 | if (ehdr == NULL) |
| 149 | { |
| 150 | printf ("cannot get ELF header: %s\n", elf_errmsg (-1)); |
| 151 | result = 1; |
| 152 | goto out_close2; |
| 153 | } |
| 154 | |
| 155 | for (cnt = 1; cnt < 5; ++cnt) |
| 156 | { |
| 157 | Elf_Scn *scn; |
| 158 | GElf_Shdr shdr_mem; |
| 159 | GElf_Shdr *shdr; |
| 160 | |
| 161 | scn = elf_getscn (elf, cnt); |
| 162 | if (scn == NULL) |
| 163 | { |
| 164 | printf ("cannot get section %Zd: %s\n", cnt, elf_errmsg (-1)); |
| 165 | result = 1; |
| 166 | continue; |
| 167 | } |
| 168 | |
| 169 | shdr = gelf_getshdr (scn, &shdr_mem); |
| 170 | if (shdr == NULL) |
| 171 | { |
| 172 | printf ("cannot get section header for section %Zd: %s\n", |
| 173 | cnt, elf_errmsg (-1)); |
| 174 | result = 1; |
| 175 | continue; |
| 176 | } |
| 177 | |
| 178 | if (strcmp (elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name), |
| 179 | scnnames[cnt]) != 0) |
| 180 | { |
| 181 | printf ("section %Zd's name differs: %s vs %s\n", cnt, |
| 182 | elf_strptr (elf, ehdr->e_shstrndx, shdr->sh_name), |
| 183 | scnnames[cnt]); |
| 184 | result = 1; |
| 185 | } |
| 186 | |
| 187 | if (shdr->sh_type != scntypes[cnt]) |
| 188 | { |
| 189 | printf ("section %Zd's type differs\n", cnt); |
| 190 | result = 1; |
| 191 | } |
| 192 | |
| 193 | if ((cnt == 1 && shdr->sh_flags != (SHF_ALLOC | SHF_WRITE)) |
| 194 | || (cnt != 1 && shdr->sh_flags != 0)) |
| 195 | { |
| 196 | printf ("section %Zd's flags differs\n", cnt); |
| 197 | result = 1; |
| 198 | } |
| 199 | |
| 200 | if (shdr->sh_addr != 0) |
| 201 | { |
| 202 | printf ("section %Zd's address differs\n", cnt); |
| 203 | result = 1; |
| 204 | } |
| 205 | |
| 206 | if (cnt == 3) |
| 207 | { |
| 208 | Elf_Data *data; |
| 209 | |
| 210 | if (shdr->sh_link != 2) |
| 211 | { |
| 212 | puts ("symbol table has incorrect link"); |
| 213 | result = 1; |
| 214 | } |
| 215 | |
| 216 | data = elf_getdata (scn, NULL); |
| 217 | if (data == NULL) |
| 218 | { |
| 219 | puts ("cannot get data of symbol table"); |
| 220 | result = 1; |
| 221 | } |
| 222 | else |
| 223 | { |
| 224 | size_t inner; |
| 225 | |
| 226 | for (inner = 1; |
| 227 | inner < (shdr->sh_size |
| 228 | / gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT)); |
| 229 | ++inner) |
| 230 | { |
| 231 | GElf_Sym sym_mem; |
| 232 | GElf_Sym *sym; |
| 233 | |
| 234 | sym = gelf_getsym (data, inner, &sym_mem); |
| 235 | if (sym == NULL) |
| 236 | { |
| 237 | printf ("cannot get symbol %zu: %s\n", |
| 238 | inner, elf_errmsg (-1)); |
| 239 | result = 1; |
| 240 | } |
| 241 | else |
| 242 | { |
| 243 | /* The order of the third and fourth entry depends |
| 244 | on how the hash table is organized. */ |
| 245 | static const char *names[4] = |
| 246 | { |
| 247 | [0] = "", |
| 248 | [1] = "two", |
| 249 | [2] = "one", |
| 250 | [3] = "three" |
| 251 | }; |
| 252 | static const int info[4] = |
| 253 | { |
| 254 | [0] = GELF_ST_INFO (STB_LOCAL, STT_NOTYPE), |
| 255 | [1] = GELF_ST_INFO (STB_LOCAL, STT_OBJECT), |
| 256 | [2] = GELF_ST_INFO (STB_GLOBAL, STT_OBJECT), |
| 257 | [3] = GELF_ST_INFO (STB_WEAK, STT_OBJECT) |
| 258 | }; |
| 259 | static const unsigned value[4] = |
| 260 | { |
| 261 | [0] = 0, |
| 262 | [1] = 4, |
| 263 | [2] = 0, |
| 264 | [3] = 8 |
| 265 | }; |
| 266 | |
| 267 | if (strcmp (names[inner], |
| 268 | elf_strptr (elf, shdr->sh_link, |
| 269 | sym->st_name)) != 0) |
| 270 | { |
| 271 | printf ("symbol %zu has different name\n", inner); |
| 272 | result = 1; |
| 273 | } |
| 274 | |
| 275 | if (sym->st_value != value[inner]) |
| 276 | { |
| 277 | printf ("symbol %zu has wrong value\n", inner); |
| 278 | result = 1; |
| 279 | } |
| 280 | |
| 281 | if (sym->st_other != 0) |
| 282 | { |
| 283 | printf ("symbol %zu has wrong other info\n", inner); |
| 284 | result = 1; |
| 285 | } |
| 286 | |
| 287 | if (sym->st_shndx != 1) |
| 288 | { |
| 289 | printf ("symbol %zu has wrong section reference\n", |
| 290 | inner); |
| 291 | result = 1; |
| 292 | } |
| 293 | |
| 294 | if (sym->st_info != info[inner]) |
| 295 | { |
| 296 | printf ("symbol %zu has wrong type or binding\n", |
| 297 | inner); |
| 298 | result = 1; |
| 299 | } |
| 300 | |
| 301 | if ((inner != 3 && sym->st_size != 4) |
| 302 | || (inner == 3 && sym->st_size != 6)) |
| 303 | { |
| 304 | printf ("symbol %zu has wrong size\n", inner); |
| 305 | result = 1; |
| 306 | } |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | out_close2: |
| 314 | elf_end (elf); |
| 315 | out_close: |
| 316 | close (fd); |
| 317 | out: |
| 318 | /* We don't need the file anymore. */ |
| 319 | unlink (fname); |
| 320 | |
| 321 | return result; |
| 322 | } |