1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 23*0Sstevel@tonic-gate /* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28*0Sstevel@tonic-gate * Use is subject to license terms. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #if !defined(_ELF64) 34*0Sstevel@tonic-gate #pragma weak elf32_newphdr = _elf32_newphdr 35*0Sstevel@tonic-gate #endif 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include "syn.h" 38*0Sstevel@tonic-gate #include <stdlib.h> 39*0Sstevel@tonic-gate #include <memory.h> 40*0Sstevel@tonic-gate #include <errno.h> 41*0Sstevel@tonic-gate #include "decl.h" 42*0Sstevel@tonic-gate #include "msg.h" 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate /* 45*0Sstevel@tonic-gate * This module is compiled twice, the second time having 46*0Sstevel@tonic-gate * -D_ELF64 defined. The following set of macros, along 47*0Sstevel@tonic-gate * with machelf.h, represent the differences between the 48*0Sstevel@tonic-gate * two compilations. Be careful *not* to add any class- 49*0Sstevel@tonic-gate * dependent code (anything that has elf32 or elf64 in the 50*0Sstevel@tonic-gate * name) to this code without hiding it behind a switch- 51*0Sstevel@tonic-gate * able macro like these. 52*0Sstevel@tonic-gate */ 53*0Sstevel@tonic-gate #if defined(_ELF64) 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate #define ELFCLASS ELFCLASS64 56*0Sstevel@tonic-gate #define elf_newphdr elf64_newphdr 57*0Sstevel@tonic-gate #define elf_getehdr elf64_getehdr 58*0Sstevel@tonic-gate #define _elf_msize _elf64_msize 59*0Sstevel@tonic-gate #define elf_fsize elf64_fsize 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate #else /* else ELF32 */ 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate #define ELFCLASS ELFCLASS32 64*0Sstevel@tonic-gate #define elf_newphdr elf32_newphdr 65*0Sstevel@tonic-gate #define elf_getehdr elf32_getehdr 66*0Sstevel@tonic-gate #define _elf_msize _elf32_msize 67*0Sstevel@tonic-gate #define elf_fsize elf32_fsize 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate #endif /* ELF64 */ 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate Phdr * 73*0Sstevel@tonic-gate elf_newphdr(Elf * elf, size_t count) 74*0Sstevel@tonic-gate { 75*0Sstevel@tonic-gate Elf_Void * ph; 76*0Sstevel@tonic-gate size_t sz; 77*0Sstevel@tonic-gate Phdr * rc; 78*0Sstevel@tonic-gate unsigned work; 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate if (elf == 0) 81*0Sstevel@tonic-gate return (0); 82*0Sstevel@tonic-gate ELFRLOCK(elf) 83*0Sstevel@tonic-gate if (elf->ed_class != ELFCLASS) { 84*0Sstevel@tonic-gate _elf_seterr(EREQ_CLASS, 0); 85*0Sstevel@tonic-gate ELFUNLOCK(elf) 86*0Sstevel@tonic-gate return (0); 87*0Sstevel@tonic-gate } 88*0Sstevel@tonic-gate ELFUNLOCK(elf) 89*0Sstevel@tonic-gate if (elf_getehdr(elf) == 0) { /* this cooks if necessary */ 90*0Sstevel@tonic-gate _elf_seterr(ESEQ_EHDR, 0); 91*0Sstevel@tonic-gate return (0); 92*0Sstevel@tonic-gate } 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate /* 95*0Sstevel@tonic-gate * Free the existing header if appropriate. This could reuse 96*0Sstevel@tonic-gate * existing space if big enough, but that's unlikely, benefit 97*0Sstevel@tonic-gate * would be negligible, and code would be more complicated. 98*0Sstevel@tonic-gate */ 99*0Sstevel@tonic-gate 100*0Sstevel@tonic-gate ELFWLOCK(elf) 101*0Sstevel@tonic-gate if (elf->ed_myflags & EDF_PHALLOC) { 102*0Sstevel@tonic-gate elf->ed_myflags &= ~EDF_PHALLOC; 103*0Sstevel@tonic-gate rc = elf->ed_phdr; 104*0Sstevel@tonic-gate free(rc); 105*0Sstevel@tonic-gate } 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate /* 108*0Sstevel@tonic-gate * Delete the header if count is zero. 109*0Sstevel@tonic-gate */ 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate ELFACCESSDATA(work, _elf_work) 112*0Sstevel@tonic-gate if ((sz = count * _elf_msize(ELF_T_PHDR, work)) == 0) { 113*0Sstevel@tonic-gate elf->ed_phflags &= ~ELF_F_DIRTY; 114*0Sstevel@tonic-gate elf->ed_phdr = 0; 115*0Sstevel@tonic-gate ((Ehdr*)elf->ed_ehdr)->e_phnum = 0; 116*0Sstevel@tonic-gate ((Ehdr*)elf->ed_ehdr)->e_phentsize = 0; 117*0Sstevel@tonic-gate elf->ed_phdrsz = 0; 118*0Sstevel@tonic-gate ELFUNLOCK(elf) 119*0Sstevel@tonic-gate return (0); 120*0Sstevel@tonic-gate } 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate if ((ph = malloc(sz)) == 0) { 123*0Sstevel@tonic-gate _elf_seterr(EMEM_PHDR, errno); 124*0Sstevel@tonic-gate elf->ed_phflags &= ~ELF_F_DIRTY; 125*0Sstevel@tonic-gate elf->ed_phdr = 0; 126*0Sstevel@tonic-gate ((Ehdr*)elf->ed_ehdr)->e_phnum = 0; 127*0Sstevel@tonic-gate ((Ehdr*)elf->ed_ehdr)->e_phentsize = 0; 128*0Sstevel@tonic-gate elf->ed_phdrsz = 0; 129*0Sstevel@tonic-gate ELFUNLOCK(elf) 130*0Sstevel@tonic-gate return (0); 131*0Sstevel@tonic-gate } 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate elf->ed_myflags |= EDF_PHALLOC; 134*0Sstevel@tonic-gate (void) memset(ph, 0, sz); 135*0Sstevel@tonic-gate elf->ed_phflags |= ELF_F_DIRTY; 136*0Sstevel@tonic-gate /* LINTED */ 137*0Sstevel@tonic-gate ((Ehdr*)elf->ed_ehdr)->e_phnum = (Half)count; 138*0Sstevel@tonic-gate ((Ehdr*)elf->ed_ehdr)->e_phentsize 139*0Sstevel@tonic-gate /* LINTED */ 140*0Sstevel@tonic-gate = (Half)elf_fsize(ELF_T_PHDR, 1, work); 141*0Sstevel@tonic-gate elf->ed_phdrsz = sz; 142*0Sstevel@tonic-gate elf->ed_phdr = rc = ph; 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate ELFUNLOCK(elf) 145*0Sstevel@tonic-gate return (rc); 146*0Sstevel@tonic-gate } 147