1 /* Copyright (C) 2002, 2005 Red Hat, Inc. 2 This file is part of Red Hat elfutils. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2002. 4 5 Red Hat elfutils is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by the 7 Free Software Foundation; version 2 of the License. 8 9 Red Hat elfutils is distributed in the hope that it will be useful, but 10 WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 General Public License for more details. 13 14 You should have received a copy of the GNU General Public License along 15 with Red Hat elfutils; if not, write to the Free Software Foundation, 16 Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 17 18 Red Hat elfutils is an included package of the Open Invention Network. 19 An included package of the Open Invention Network is a package for which 20 Open Invention Network licensees cross-license their patents. No patent 21 license is granted, either expressly or impliedly, by designation as an 22 included package. Should you wish to participate in the Open Invention 23 Network licensing program, please visit www.openinventionnetwork.com 24 <http://www.openinventionnetwork.com>. */ 25 26 #ifdef HAVE_CONFIG_H 27 # include <config.h> 28 #endif 29 30 #include <fcntl.h> 31 #include <inttypes.h> 32 #include ELFUTILS_HEADER(asm) 33 #include <libelf.h> 34 #include <stdio.h> 35 #include <unistd.h> 36 37 38 static const char fname[] = "asm-tst8-out.o"; 39 40 41 int 42 main (void) 43 { 44 int result = 0; 45 size_t cnt; 46 AsmCtx_t *ctx; 47 Elf *elf; 48 int fd; 49 50 elf_version (EV_CURRENT); 51 52 Ebl *ebl = ebl_openbackend_machine (EM_386); 53 if (ebl == NULL) 54 { 55 puts ("cannot open backend library"); 56 return 1; 57 } 58 59 ctx = asm_begin (fname, ebl, false); 60 if (ctx == NULL) 61 { 62 printf ("cannot create assembler context: %s\n", asm_errmsg (-1)); 63 return 1; 64 } 65 66 if (asm_newabssym (ctx, "tst8-out.s", 4, 0xfeedbeef, STT_FILE, STB_LOCAL) 67 == NULL) 68 { 69 printf ("cannot create absolute symbol: %s\n", asm_errmsg (-1)); 70 asm_abort (ctx); 71 return 1; 72 } 73 74 /* Create the output file. */ 75 if (asm_end (ctx) != 0) 76 { 77 printf ("cannot create output file: %s\n", asm_errmsg (-1)); 78 asm_abort (ctx); 79 return 1; 80 } 81 82 /* Check the file. */ 83 fd = open (fname, O_RDONLY); 84 if (fd == -1) 85 { 86 printf ("cannot open generated file: %m\n"); 87 result = 1; 88 goto out; 89 } 90 91 elf = elf_begin (fd, ELF_C_READ, NULL); 92 if (elf == NULL) 93 { 94 printf ("cannot create ELF descriptor: %s\n", elf_errmsg (-1)); 95 result = 1; 96 goto out_close; 97 } 98 if (elf_kind (elf) != ELF_K_ELF) 99 { 100 puts ("not a valid ELF file"); 101 result = 1; 102 goto out_close2; 103 } 104 105 for (cnt = 1; 1; ++cnt) 106 { 107 Elf_Scn *scn; 108 GElf_Shdr shdr_mem; 109 GElf_Shdr *shdr; 110 111 scn = elf_getscn (elf, cnt); 112 if (scn == NULL) 113 { 114 printf ("cannot get section %Zd: %s\n", cnt, elf_errmsg (-1)); 115 result = 1; 116 continue; 117 } 118 119 shdr = gelf_getshdr (scn, &shdr_mem); 120 if (shdr == NULL) 121 { 122 printf ("cannot get section header for section %Zd: %s\n", 123 cnt, elf_errmsg (-1)); 124 result = 1; 125 continue; 126 } 127 /* We are looking for the symbol table. */ 128 if (shdr->sh_type != SHT_SYMTAB) 129 continue; 130 131 for (cnt = 1; cnt< (shdr->sh_size 132 / gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT)); 133 ++cnt) 134 { 135 GElf_Sym sym_mem; 136 GElf_Sym *sym; 137 138 if (cnt > 1) 139 { 140 puts ("too many symbol"); 141 result = 1; 142 break; 143 } 144 145 sym = gelf_getsym (elf_getdata (scn, NULL), cnt, &sym_mem); 146 if (sym == NULL) 147 { 148 printf ("cannot get symbol %zu: %s\n", cnt, elf_errmsg (-1)); 149 result = 1; 150 } 151 else 152 { 153 if (sym->st_shndx != SHN_ABS) 154 { 155 printf ("expected common symbol, got section %u\n", 156 (unsigned int) sym->st_shndx); 157 result = 1; 158 } 159 160 if (sym->st_value != 0xfeedbeef) 161 { 162 printf ("requested value 0xfeedbeef, is %#" PRIxMAX "\n", 163 (uintmax_t) sym->st_value); 164 result = 1; 165 } 166 167 if (sym->st_size != 4) 168 { 169 printf ("requested size 4, is %" PRIuMAX "\n", 170 (uintmax_t) sym->st_value); 171 result = 1; 172 } 173 174 if (GELF_ST_TYPE (sym->st_info) != STT_FILE) 175 { 176 printf ("requested type FILE, is %u\n", 177 (unsigned int) GELF_ST_TYPE (sym->st_info)); 178 result = 1; 179 } 180 } 181 } 182 183 break; 184 } 185 186 out_close2: 187 elf_end (elf); 188 out_close: 189 close (fd); 190 out: 191 /* We don't need the file anymore. */ 192 unlink (fname); 193 194 ebl_closebackend (ebl); 195 196 return result; 197 } 198
