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-tst2-out.o"; |
| 23 | |
| 24 | |
| 25 | static const GElf_Ehdr expected_ehdr = |
| 26 | { |
| 27 | .e_ident = { [EI_MAG0] = ELFMAG0, |
| 28 | [EI_MAG1] = ELFMAG1, |
| 29 | [EI_MAG2] = ELFMAG2, |
| 30 | [EI_MAG3] = ELFMAG3, |
| 31 | [EI_CLASS] = ELFCLASS32, |
| 32 | [EI_DATA] = ELFDATA2LSB, |
| 33 | [EI_VERSION] = EV_CURRENT }, |
| 34 | .e_type = ET_REL, |
| 35 | .e_machine = EM_386, |
| 36 | .e_version = EV_CURRENT, |
| 37 | .e_shoff = 96, |
| 38 | .e_ehsize = sizeof (Elf32_Ehdr), |
| 39 | .e_shentsize = sizeof (Elf32_Shdr), |
| 40 | .e_shnum = 3, |
| 41 | .e_shstrndx = 2 |
| 42 | }; |
| 43 | |
| 44 | |
| 45 | static const char *scnnames[3] = |
| 46 | { |
| 47 | [0] = "", |
| 48 | [1] = ".data", |
| 49 | [2] = ".shstrtab" |
| 50 | }; |
| 51 | |
| 52 | |
| 53 | int |
| 54 | main (void) |
| 55 | { |
| 56 | AsmCtx_t *ctx; |
| 57 | AsmScn_t *scn1; |
| 58 | AsmScn_t *scn2; |
| 59 | int result = 0; |
| 60 | int fd; |
| 61 | Elf *elf; |
| 62 | GElf_Ehdr ehdr_mem; |
| 63 | GElf_Ehdr *ehdr; |
| 64 | size_t cnt; |
| 65 | |
| 66 | elf_version (EV_CURRENT); |
| 67 | |
| 68 | ctx = asm_begin (fname, false, EM_386, ELFCLASS32, ELFDATA2LSB); |
| 69 | if (ctx == NULL) |
| 70 | { |
| 71 | printf ("cannot create assembler context: %s\n", asm_errmsg (-1)); |
| 72 | return 1; |
| 73 | } |
| 74 | |
| 75 | /* Create two sections. */ |
| 76 | scn1 = asm_newscn (ctx, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE); |
| 77 | scn2 = asm_newsubscn (scn1, 1); |
| 78 | if (scn1 == NULL || scn2 == NULL) |
| 79 | { |
| 80 | printf ("cannot create section in output file: %s\n", asm_errmsg (-1)); |
| 81 | asm_abort (ctx); |
| 82 | return 1; |
| 83 | } |
| 84 | |
| 85 | /* Special alignment for the .text section. */ |
| 86 | if (asm_align (scn1, 16) != 0) |
| 87 | { |
| 88 | printf ("cannot align .text section: %s\n", asm_errmsg (-1)); |
| 89 | result = 1; |
| 90 | } |
| 91 | |
| 92 | /* Add a few strings. */ |
| 93 | if (asm_addstrz (scn1, "one", 4) != 0) |
| 94 | { |
| 95 | printf ("cannot insert first string: %s\n", asm_errmsg (-1)); |
| 96 | result = 1; |
| 97 | } |
| 98 | if (asm_addstrz (scn2, "three", 0) != 0) |
| 99 | { |
| 100 | printf ("cannot insert second string: %s\n", asm_errmsg (-1)); |
| 101 | result = 1; |
| 102 | } |
| 103 | if (asm_addstrz (scn1, "two", 4) != 0) |
| 104 | { |
| 105 | printf ("cannot insert third string: %s\n", asm_errmsg (-1)); |
| 106 | result = 1; |
| 107 | } |
| 108 | |
| 109 | /* Create the output file. */ |
| 110 | if (asm_end (ctx) != 0) |
| 111 | { |
| 112 | printf ("cannot create output file: %s\n", asm_errmsg (-1)); |
| 113 | asm_abort (ctx); |
| 114 | return 1; |
| 115 | } |
| 116 | |
| 117 | /* Check the file. */ |
| 118 | fd = open (fname, O_RDONLY); |
| 119 | if (fd == -1) |
| 120 | { |
| 121 | printf ("cannot open generated file: %m\n"); |
| 122 | result = 1; |
| 123 | goto out; |
| 124 | } |
| 125 | |
| 126 | elf = elf_begin (fd, ELF_C_READ, NULL); |
| 127 | if (elf == NULL) |
| 128 | { |
| 129 | printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1)); |
| 130 | result = 1; |
| 131 | goto out_close; |
| 132 | } |
| 133 | if (elf_kind (elf) != ELF_K_ELF) |
| 134 | { |
| 135 | puts ("not a valid ELF file"); |
| 136 | result = 1; |
| 137 | goto out_close2; |
| 138 | } |
| 139 | |
| 140 | ehdr = gelf_getehdr (elf, &ehdr_mem); |
| 141 | if (ehdr == NULL) |
| 142 | { |
| 143 | printf ("cannot get ELF header: %s\n", elf_errmsg (-1)); |
| 144 | result = 1; |
| 145 | goto out_close2; |
| 146 | } |
| 147 | |
| 148 | if (memcmp (ehdr, &expected_ehdr, sizeof (GElf_Ehdr)) != 0) |
| 149 | { |
| 150 | puts ("ELF header does not match"); |
| 151 | result = 1; |
| 152 | goto out_close2; |
| 153 | } |
| 154 | |
| 155 | for (cnt = 1; cnt < 3; ++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 != (cnt == 2 ? SHT_STRTAB : SHT_PROGBITS)) |
| 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 == 2 && 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 == 1 && shdr->sh_offset != ((sizeof (Elf32_Ehdr) + 15) & ~15)) |
| 207 | || (cnt == 2 |
| 208 | && shdr->sh_offset != (((sizeof (Elf32_Ehdr) + 15) & ~15) |
| 209 | + strlen ("one") + 1 |
| 210 | + strlen ("two") + 1 |
| 211 | + strlen ("three") + 1))) |
| 212 | { |
| 213 | printf ("section %Zd's offset differs\n", cnt); |
| 214 | result = 1; |
| 215 | } |
| 216 | |
| 217 | if ((cnt == 1 && shdr->sh_size != (strlen ("one") + 1 |
| 218 | + strlen ("two") + 1 |
| 219 | + strlen ("three") + 1)) |
| 220 | || (cnt == 2 && shdr->sh_size != 17)) |
| 221 | { |
| 222 | printf ("section %Zd's size differs\n", cnt); |
| 223 | result = 1; |
| 224 | } |
| 225 | |
| 226 | if (shdr->sh_link != 0) |
| 227 | { |
| 228 | printf ("section %Zd's link differs\n", cnt); |
| 229 | result = 1; |
| 230 | } |
| 231 | |
| 232 | if (shdr->sh_info != 0) |
| 233 | { |
| 234 | printf ("section %Zd's info differs\n", cnt); |
| 235 | result = 1; |
| 236 | } |
| 237 | |
| 238 | if ((cnt == 1 && shdr->sh_addralign != 16) |
| 239 | || (cnt != 1 && shdr->sh_addralign != 1)) |
| 240 | { |
| 241 | printf ("section %Zd's addralign differs\n", cnt); |
| 242 | result = 1; |
| 243 | } |
| 244 | |
| 245 | if (shdr->sh_entsize != 0) |
| 246 | { |
| 247 | printf ("section %Zd's entsize differs\n", cnt); |
| 248 | result = 1; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | out_close2: |
| 253 | elf_end (elf); |
| 254 | out_close: |
| 255 | close (fd); |
| 256 | out: |
| 257 | /* We don't need the file anymore. */ |
| 258 | unlink (fname); |
| 259 | |
| 260 | return result; |
| 261 | } |