1 /* Define new symbol for current position in given section. 2 Copyright (C) 2002, 2005 Red Hat, Inc. 3 This file is part of elfutils. 4 Written by Ulrich Drepper <drepper (at) redhat.com>, 2002. 5 6 This file is free software; you can redistribute it and/or modify 7 it under the terms of either 8 9 * the GNU Lesser General Public License as published by the Free 10 Software Foundation; either version 3 of the License, or (at 11 your option) any later version 12 13 or 14 15 * the GNU General Public License as published by the Free 16 Software Foundation; either version 2 of the License, or (at 17 your option) any later version 18 19 or both in parallel, as here. 20 21 elfutils is distributed in the hope that it will be useful, but 22 WITHOUT ANY WARRANTY; without even the implied warranty of 23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24 General Public License for more details. 25 26 You should have received copies of the GNU General Public License and 27 the GNU Lesser General Public License along with this program. If 28 not, see <http://www.gnu.org/licenses/>. */ 29 30 #ifdef HAVE_CONFIG_H 31 # include <config.h> 32 #endif 33 34 #include <inttypes.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 39 #include <libasmP.h> 40 #include <system.h> 41 42 43 AsmSym_t * 44 asm_newsym (asmscn, name, size, type, binding) 45 AsmScn_t *asmscn; 46 const char *name; 47 GElf_Xword size; 48 int type; 49 int binding; 50 { 51 #define TEMPSYMLEN 10 52 char tempsym[TEMPSYMLEN]; 53 AsmSym_t *result; 54 55 if (asmscn == NULL) 56 /* Something went wrong before. */ 57 return NULL; 58 59 /* Generate a temporary symbol if necessary. */ 60 if (name == NULL) 61 { 62 /* If a local symbol name is created the symbol better have 63 local binding. */ 64 if (binding != STB_LOCAL) 65 { 66 __libasm_seterrno (ASM_E_INVALID); 67 return NULL; 68 } 69 70 // XXX This requires getting the format from the machine backend. */ 71 snprintf (tempsym, TEMPSYMLEN, ".L%07u", asmscn->ctx->tempsym_count++); 72 73 name = tempsym; 74 } 75 76 size_t name_len = strlen (name) + 1; 77 78 result = (AsmSym_t *) malloc (sizeof (AsmSym_t) + name_len); 79 if (result == NULL) 80 return NULL; 81 82 rwlock_wrlock (asmscn->ctx->lock); 83 84 result->scn = asmscn; 85 result->offset = asmscn->offset; 86 result->size = size; 87 result->type = type; 88 result->binding = binding; 89 result->symidx = 0; 90 result->strent = ebl_strtabadd (asmscn->ctx->symbol_strtab, 91 memcpy (result + 1, name, name_len), 0); 92 93 if (unlikely (asmscn->ctx->textp)) 94 { 95 /* We are only interested in the name and don't need to know whether 96 it is a local name or not. */ 97 /* First print the binding pseudo-op. */ 98 if (binding == STB_GLOBAL) 99 fprintf (asmscn->ctx->out.file, "\t.globl\t%s\n", name); 100 else if (binding == STB_WEAK) 101 fprintf (asmscn->ctx->out.file, "\t.weak\t%s\n", name); 102 103 /* Next the symbol type. */ 104 if (type == STT_OBJECT) 105 fprintf (asmscn->ctx->out.file, "\t.type\t%s,@object\n", name); 106 else if (type == STT_FUNC) 107 fprintf (asmscn->ctx->out.file, "\t.type\t%s,@function\n", name); 108 109 /* Finally the size and the label. */ 110 fprintf (asmscn->ctx->out.file, "\t.size\t%s,%" PRIuMAX "\n%s:\n", 111 name, (uintmax_t) size, name); 112 } 113 else 114 { 115 /* Put the symbol in the hash table so that we can later find it. */ 116 if (asm_symbol_tab_insert (&asmscn->ctx->symbol_tab, elf_hash (name), 117 result) != 0) 118 { 119 /* The symbol already exists. */ 120 __libasm_seterrno (ASM_E_DUPLSYM); 121 /* Note that we can free the entry since there must be no 122 reference in the string table to the string. We can only 123 fail to insert the symbol into the symbol table if there 124 is already a symbol with this name. In this case the 125 ebl_strtabadd function would use the previously provided 126 name. */ 127 free (result); 128 result = NULL; 129 } 130 else if (name != tempsym && asm_emit_symbol_p (name)) 131 /* Only count non-private symbols. */ 132 ++asmscn->ctx->nsymbol_tab; 133 } 134 135 rwlock_unlock (asmscn->ctx->lock); 136 137 return result; 138 } 139
