diff options
Diffstat (limited to 'cddl/contrib/opensolaris/tools/ctf/common/symbol.c')
-rw-r--r-- | cddl/contrib/opensolaris/tools/ctf/common/symbol.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/tools/ctf/common/symbol.c b/cddl/contrib/opensolaris/tools/ctf/common/symbol.c new file mode 100644 index 0000000..29796ac --- /dev/null +++ b/cddl/contrib/opensolaris/tools/ctf/common/symbol.c @@ -0,0 +1,62 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2004 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <sys/types.h> +#include <string.h> + +#include "symbol.h" + +int +ignore_symbol(GElf_Sym *sym, const char *name) +{ + uchar_t type = GELF_ST_TYPE(sym->st_info); + + /* + * As an optimization, we do not output function or data object + * records for undefined or anonymous symbols. + */ + if (sym->st_shndx == SHN_UNDEF || sym->st_name == 0) + return (1); + + /* + * _START_ and _END_ are added to the symbol table by the + * linker, and will never have associated type information. + */ + if (strcmp(name, "_START_") == 0 || strcmp(name, "_END_") == 0) + return (1); + + /* + * Do not output records for absolute-valued object symbols + * that have value zero. The compiler insists on generating + * things like this for __fsr_init_value settings, etc. + */ + if (type == STT_OBJECT && sym->st_shndx == SHN_ABS && + sym->st_value == 0) + return (1); + return (0); +} |