1 /* Create new ABS symbol. 2 Copyright (C) 2002 Red Hat, Inc. 3 This file is part of Red Hat elfutils. 4 Written by Ulrich Drepper <drepper (at) redhat.com>, 2002. 5 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. 9 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, 17 Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 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>. */ 26 27 #ifdef HAVE_CONFIG_H 28 # include <config.h> 29 #endif 30 31 #include <inttypes.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 36 #include <libasmP.h> 37 #include <system.h> 38 39 40 /* Object for special COMMON section. */ 41 static const AsmScn_t __libasm_abs_scn = 42 { 43 .data = { 44 .main = { 45 .scn = ASM_ABS_SCN 46 } 47 } 48 }; 49 50 51 AsmSym_t * 52 asm_newabssym (ctx, name, size, value, type, binding) 53 AsmCtx_t *ctx; 54 const char *name; 55 GElf_Xword size; 56 GElf_Addr value; 57 int type; 58 int binding; 59 { 60 AsmSym_t *result; 61 62 if (ctx == NULL) 63 /* Something went wrong before. */ 64 return NULL; 65 66 /* Common symbols are public. Therefore the user must provide a 67 name. */ 68 if (name == NULL) 69 { 70 __libasm_seterrno (ASM_E_INVALID); 71 return NULL; 72 } 73 74 rwlock_wrlock (ctx->lock); 75 76 result = (AsmSym_t *) malloc (sizeof (AsmSym_t)); 77 if (result == NULL) 78 return NULL; 79 80 result->scn = (AsmScn_t *) &__libasm_abs_scn; 81 result->size = size; 82 result->type = type; 83 result->binding = binding; 84 result->symidx = 0; 85 result->strent = ebl_strtabadd (ctx->symbol_strtab, name, 0); 86 87 /* The value of an ABS symbol must not be modified. Since there are 88 no subsection and the initial offset of the section is 0 we can 89 get the alignment recorded by storing it into the offset 90 field. */ 91 result->offset = value; 92 93 if (unlikely (ctx->textp)) 94 { 95 /* An absolute symbol can be defined by giving a symbol a 96 specific value. */ 97 if (binding == STB_GLOBAL) 98 fprintf (ctx->out.file, "\t.globl %s\n", name); 99 else if (binding == STB_WEAK) 100 fprintf (ctx->out.file, "\t.weak %s\n", name); 101 102 if (type == STT_OBJECT) 103 fprintf (ctx->out.file, "\t.type %s,@object\n", name); 104 else if (type == STT_FUNC) 105 fprintf (ctx->out.file, "\t.type %s,@function\n", name); 106 107 fprintf (ctx->out.file, "%s = %llu\n", 108 name, (unsigned long long int) value); 109 110 if (size != 0) 111 fprintf (ctx->out.file, "\t.size %s, %llu\n", 112 name, (unsigned long long int) size); 113 } 114 else 115 { 116 /* Put the symbol in the hash table so that we can later find it. */ 117 if (asm_symbol_tab_insert (&ctx->symbol_tab, elf_hash (name), result) 118 != 0) 119 { 120 /* The symbol already exists. */ 121 __libasm_seterrno (ASM_E_DUPLSYM); 122 free (result); 123 result = NULL; 124 } 125 else if (name != NULL && asm_emit_symbol_p (name)) 126 /* Only count non-private symbols. */ 127 ++ctx->nsymbol_tab; 128 } 129 130 rwlock_unlock (ctx->lock); 131 132 return result; 133 } 134
