1 /* Define new symbol for current position in given section. 2 Copyright (C) 2002, 2005 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 AsmSym_t * 41 asm_newsym (asmscn, name, size, type, binding) 42 AsmScn_t *asmscn; 43 const char *name; 44 GElf_Xword size; 45 int type; 46 int binding; 47 { 48 #define TEMPSYMLEN 10 49 char tempsym[TEMPSYMLEN]; 50 AsmSym_t *result; 51 52 if (asmscn == NULL) 53 /* Something went wrong before. */ 54 return NULL; 55 56 /* Generate a temporary symbol if necessary. */ 57 if (name == NULL) 58 { 59 /* If a local symbol name is created the symbol better have 60 local binding. */ 61 if (binding != STB_LOCAL) 62 { 63 __libasm_seterrno (ASM_E_INVALID); 64 return NULL; 65 } 66 67 // XXX This requires getting the format from the machine backend. */ 68 snprintf (tempsym, TEMPSYMLEN, ".L%07u", asmscn->ctx->tempsym_count++); 69 70 name = tempsym; 71 } 72 73 size_t name_len = strlen (name) + 1; 74 75 result = (AsmSym_t *) malloc (sizeof (AsmSym_t) + name_len); 76 if (result == NULL) 77 return NULL; 78 79 rwlock_wrlock (asmscn->ctx->lock); 80 81 result->scn = asmscn; 82 result->offset = asmscn->offset; 83 result->size = size; 84 result->type = type; 85 result->binding = binding; 86 result->symidx = 0; 87 result->strent = ebl_strtabadd (asmscn->ctx->symbol_strtab, 88 memcpy (result + 1, name, name_len), 0); 89 90 if (unlikely (asmscn->ctx->textp)) 91 { 92 /* We are only interested in the name and don't need to know whether 93 it is a local name or not. */ 94 /* First print the binding pseudo-op. */ 95 if (binding == STB_GLOBAL) 96 fprintf (asmscn->ctx->out.file, "\t.globl\t%s\n", name); 97 else if (binding == STB_WEAK) 98 fprintf (asmscn->ctx->out.file, "\t.weak\t%s\n", name); 99 100 /* Next the symbol type. */ 101 if (type == STT_OBJECT) 102 fprintf (asmscn->ctx->out.file, "\t.type\t%s,@object\n", name); 103 else if (type == STT_FUNC) 104 fprintf (asmscn->ctx->out.file, "\t.type\t%s,@function\n", name); 105 106 /* Finally the size and the label. */ 107 fprintf (asmscn->ctx->out.file, "\t.size\t%s,%" PRIuMAX "\n%s:\n", 108 name, (uintmax_t) size, name); 109 } 110 else 111 { 112 /* Put the symbol in the hash table so that we can later find it. */ 113 if (asm_symbol_tab_insert (&asmscn->ctx->symbol_tab, elf_hash (name), 114 result) != 0) 115 { 116 /* The symbol already exists. */ 117 __libasm_seterrno (ASM_E_DUPLSYM); 118 /* Note that we can free the entry since there must be no 119 reference in the string table to the string. We can only 120 fail to insert the symbol into the symbol table if there 121 is already a symbol with this name. In this case the 122 ebl_strtabadd function would use the previously provided 123 name. */ 124 free (result); 125 result = NULL; 126 } 127 else if (name != tempsym && asm_emit_symbol_p (name)) 128 /* Only count non-private symbols. */ 129 ++asmscn->ctx->nsymbol_tab; 130 } 131 132 rwlock_unlock (asmscn->ctx->lock); 133 134 return result; 135 } 136
