1 /*- 2 * Copyright (c) 2015 Kai Wang 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/queue.h> 28 #include <errno.h> 29 #include <stdlib.h> 30 31 #include "_libpe.h" 32 33 ELFTC_VCSID("$Id: pe_init.c 3312 2016-01-10 09:23:51Z kaiwang27 $"); 34 35 PE * 36 pe_init(int fd, PE_Cmd c, PE_Object o) 37 { 38 PE *pe; 39 40 if ((pe = calloc(1, sizeof(*pe))) == NULL) { 41 errno = ENOMEM; 42 return (NULL); 43 } 44 pe->pe_fd = fd; 45 pe->pe_cmd = c; 46 pe->pe_obj = o; 47 STAILQ_INIT(&pe->pe_scn); 48 49 switch (c) { 50 case PE_C_READ: 51 case PE_C_RDWR: 52 if (libpe_open_object(pe) < 0) 53 goto init_fail; 54 break; 55 56 case PE_C_WRITE: 57 if (o < PE_O_PE32 || o > PE_O_COFF) { 58 errno = EINVAL; 59 goto init_fail; 60 } 61 break; 62 63 default: 64 errno = EINVAL; 65 goto init_fail; 66 } 67 68 return (pe); 69 70 init_fail: 71 pe_finish(pe); 72 return (NULL); 73 } 74 75 void 76 pe_finish(PE *pe) 77 { 78 79 if (pe == NULL) 80 return; 81 82 libpe_release_object(pe); 83 } 84 85 PE_Object 86 pe_object(PE *pe) 87 { 88 89 if (pe == NULL) { 90 errno = EINVAL; 91 return (PE_O_UNKNOWN); 92 } 93 94 return (pe->pe_obj); 95 } 96