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 2005 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 32*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.3 */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #include "syn.h" 35*0Sstevel@tonic-gate #include <sys/mman.h> 36*0Sstevel@tonic-gate #include <stdio.h> 37*0Sstevel@tonic-gate #include <stdlib.h> 38*0Sstevel@tonic-gate #include <unistd.h> 39*0Sstevel@tonic-gate #include <libelf.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 * File output 46*0Sstevel@tonic-gate * These functions write output files. 47*0Sstevel@tonic-gate * On SVR4 and newer systems use mmap(2). On older systems (or on 48*0Sstevel@tonic-gate * file systems that don't support mmap), use write(2). 49*0Sstevel@tonic-gate */ 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate 52*0Sstevel@tonic-gate char * 53*0Sstevel@tonic-gate _elf_outmap(int fd, size_t sz, unsigned int *pflag) 54*0Sstevel@tonic-gate { 55*0Sstevel@tonic-gate char *p; 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate /* 58*0Sstevel@tonic-gate * Note: Some NFS implementations do not provide from enlarging a file 59*0Sstevel@tonic-gate * via ftruncate(), thus this may fail with ENOSUP. In this case the 60*0Sstevel@tonic-gate * fall through to the calloc() mechanism will occur. 61*0Sstevel@tonic-gate */ 62*0Sstevel@tonic-gate if ((!*pflag) && (ftruncate(fd, (off_t)sz) == 0) && 63*0Sstevel@tonic-gate (p = mmap((char *)0, sz, PROT_READ+PROT_WRITE, 64*0Sstevel@tonic-gate MAP_SHARED, fd, (off_t)0)) != (char *)-1) { 65*0Sstevel@tonic-gate *pflag = 1; 66*0Sstevel@tonic-gate return (p); 67*0Sstevel@tonic-gate } 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate *pflag = 0; 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate /* 72*0Sstevel@tonic-gate * If mmap fails, try calloc. Some file systems don't mmap. Note, we 73*0Sstevel@tonic-gate * use calloc rather than malloc, as ld(1) assumes that the backing 74*0Sstevel@tonic-gate * storage it is working with is zero filled. 75*0Sstevel@tonic-gate */ 76*0Sstevel@tonic-gate if ((p = (char *)calloc(1, sz)) == 0) 77*0Sstevel@tonic-gate _elf_seterr(EMEM_OUT, errno); 78*0Sstevel@tonic-gate return (p); 79*0Sstevel@tonic-gate } 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate size_t 83*0Sstevel@tonic-gate _elf_outsync(int fd, char *p, size_t sz, unsigned int flag) 84*0Sstevel@tonic-gate { 85*0Sstevel@tonic-gate if (flag != 0) { 86*0Sstevel@tonic-gate int err; 87*0Sstevel@tonic-gate /* 88*0Sstevel@tonic-gate * The value of MS_SYNC changed from zero to non-zero 89*0Sstevel@tonic-gate * in SunOS 5.7. This double call covers both cases. 90*0Sstevel@tonic-gate */ 91*0Sstevel@tonic-gate if ((fd = msync(p, sz, MS_SYNC)) == -1) 92*0Sstevel@tonic-gate fd = msync(p, sz, 0); 93*0Sstevel@tonic-gate if (fd == -1) 94*0Sstevel@tonic-gate err = errno; 95*0Sstevel@tonic-gate (void) munmap(p, sz); 96*0Sstevel@tonic-gate if (fd == 0) 97*0Sstevel@tonic-gate return (sz); 98*0Sstevel@tonic-gate _elf_seterr(EIO_SYNC, err); 99*0Sstevel@tonic-gate return (0); 100*0Sstevel@tonic-gate } 101*0Sstevel@tonic-gate if (lseek(fd, 0L, SEEK_SET) == 0) { 102*0Sstevel@tonic-gate if (write(fd, p, sz) == sz) { 103*0Sstevel@tonic-gate (void) free(p); 104*0Sstevel@tonic-gate return (sz); 105*0Sstevel@tonic-gate } 106*0Sstevel@tonic-gate } 107*0Sstevel@tonic-gate _elf_seterr(EIO_WRITE, errno); 108*0Sstevel@tonic-gate return (0); 109*0Sstevel@tonic-gate } 110