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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <string.h> 27 #include <gelf.h> 28 #include <decl.h> 29 #include <msg.h> 30 31 /* 32 * Return number of entries in the program header array, taking 33 * extended headers into account. 34 * 35 * elf_getphnum() was defined based on the definition of the earlier 36 * elf_getshnum(). It returns 0 for failure, and 1 for success. 37 * 38 * elf_getphdrnum() supercedes elf_getphnum(), which is now considered 39 * obsolete. It returns -1 for failure and 0 for success, matching 40 * elf_getshdrnum(), and bringing us into alignment with the interface 41 * agreed to in the 2002 gABI meeting. 42 * 43 * See the comment in getshnum.c for additional information. 44 */ 45 46 int 47 elf_getphdrnum(Elf *elf, size_t *phnum) 48 { 49 GElf_Ehdr ehdr; 50 Elf_Scn *scn; 51 GElf_Shdr shdr0; 52 53 if (gelf_getehdr(elf, &ehdr) == NULL) 54 return (-1); 55 56 if (ehdr.e_phnum != PN_XNUM) { 57 *phnum = ehdr.e_phnum; 58 return (0); 59 } 60 61 if ((scn = elf_getscn(elf, 0)) == NULL || 62 gelf_getshdr(scn, &shdr0) == NULL) 63 return (-1); 64 65 if (shdr0.sh_info == 0) 66 *phnum = ehdr.e_phnum; 67 else 68 *phnum = shdr0.sh_info; 69 70 return (0); 71 } 72 73 int 74 elf_getphnum(Elf *elf, size_t *phnum) 75 { 76 return (elf_getphdrnum(elf, phnum) == 0); 77 } 78