1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <string.h> 31 32 #include "symbol.h" 33 34 int 35 ignore_symbol(GElf_Sym *sym, const char *name) 36 { 37 uchar_t type = GELF_ST_TYPE(sym->st_info); 38 39 /* 40 * As an optimization, we do not output function or data object 41 * records for undefined or anonymous symbols. 42 */ 43 if (sym->st_shndx == SHN_UNDEF || sym->st_name == 0) 44 return (1); 45 46 /* 47 * _START_ and _END_ are added to the symbol table by the 48 * linker, and will never have associated type information. 49 */ 50 if (strcmp(name, "_START_") == 0 || strcmp(name, "_END_") == 0) 51 return (1); 52 53 /* 54 * Do not output records for absolute-valued object symbols 55 * that have value zero. The compiler insists on generating 56 * things like this for __fsr_init_value settings, etc. 57 */ 58 if (type == STT_OBJECT && sym->st_shndx == SHN_ABS && 59 sym->st_value == 0) 60 return (1); 61 return (0); 62 } 63