| /*␊ |
| * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
| *␊ |
| * @APPLE_LICENSE_HEADER_START@␊ |
| * ␊ |
| * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
| * Reserved. This file contains Original Code and/or Modifications of␊ |
| * Original Code as defined in and that are subject to the Apple Public␊ |
| * Source License Version 2.0 (the "License"). You may not use this file␊ |
| * except in compliance with the License. Please obtain a copy of the␊ |
| * License at http://www.apple.com/publicsource and read it before using␊ |
| * this file.␊ |
| * ␊ |
| * The Original Code and all software distributed under the License are␊ |
| * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
| * License for the specific language governing rights and limitations␊ |
| * under the License.␊ |
| * ␊ |
| * @APPLE_LICENSE_HEADER_END@␊ |
| */␊ |
| #include <stdio.h>␊ |
| #include <stdlib.h>␊ |
| #include <stdbool.h>␊ |
| #include <mach/mach.h>␊ |
| #include <mach/mach_error.h>␊ |
| #include <sys/file.h>␊ |
| #include <mach-o/loader.h>␊ |
| #include <libkern/OSByteOrder.h>␊ |
| #include <unistd.h>␊ |
| ␊ |
| int␉infile;␊ |
| ␊ |
| struct mach_header␉mh;␊ |
| void *␉␉cmds;␊ |
| ␊ |
| static bool␉swap_ends;␊ |
| ␊ |
| static unsigned long swap(␊ |
| ␉␉␉␉␉␉ unsigned long x␊ |
| ␉␉␉␉␉␉ )␊ |
| {␊ |
| if (swap_ends)␊ |
| ␉␉return OSSwapInt32(x);␊ |
| else␊ |
| ␉␉return x;␊ |
| }␊ |
| ␊ |
| int␊ |
| main(int argc, char *argv[])␊ |
| {␊ |
| int␉␉␉nc, ncmds;␊ |
| char *␉␉cp;␊ |
| ␊ |
| if (argc == 3) {␊ |
| ␉␉infile = open(argv[1], O_RDONLY);␊ |
| ␉␉if (infile < 0)␊ |
| ␉␉␉goto usage;␊ |
| }␊ |
| else {␊ |
| ␉usage:␊ |
| ␉fprintf(stderr, "usage: segsize segment\n");␊ |
| ␉␉exit(1);␊ |
| }␊ |
| ␊ |
| nc = read(infile, &mh, sizeof (mh));␊ |
| if (nc < 0) {␊ |
| ␉␉perror("read mach header");␊ |
| ␉␉exit(1);␊ |
| }␊ |
| if (nc < (int)sizeof (mh)) {␊ |
| ␉␉fprintf(stderr, "read mach header: premature EOF %d\n", nc);␊ |
| ␉␉exit(1);␊ |
| }␊ |
| if (mh.magic == MH_MAGIC)␊ |
| ␉␉swap_ends = false;␊ |
| else if (mh.magic == MH_CIGAM)␊ |
| ␉␉swap_ends = true;␊ |
| else {␊ |
| ␉fprintf(stderr, "bad magic number %lx\n", (unsigned long)mh.magic);␊ |
| ␉␉exit(1);␊ |
| }␊ |
| ␉␊ |
| cmds = calloc(swap(mh.sizeofcmds), sizeof (char));␊ |
| if (cmds == 0) {␊ |
| ␉␉fprintf(stderr, "alloc load commands: no memory\n");␊ |
| ␉␉exit(1);␊ |
| }␊ |
| nc = read(infile, cmds, swap(mh.sizeofcmds));␊ |
| if (nc < 0) {␊ |
| ␉␉perror("read load commands");␊ |
| ␉␉exit(1);␊ |
| }␊ |
| if (nc < (int)swap(mh.sizeofcmds)) {␊ |
| ␉␉fprintf(stderr, "read load commands: premature EOF %d\n", nc);␊ |
| ␉␉exit(1);␊ |
| }␊ |
| ␉␊ |
| for (␉ncmds = swap(mh.ncmds), cp = cmds;␊ |
| ␉␉ ncmds > 0; ncmds--) {␊ |
| //␉ bool␉isDATA;␊ |
| //␉ unsigned␉vmsize;␊ |
| ␉␉␊ |
| #define lcp␉((struct load_command *)cp) ␊ |
| ␉␉switch(swap(lcp->cmd)) {␊ |
| ␉␉␉␉␊ |
| ␉␉␉case LC_SEGMENT:␊ |
| #define scp␉((struct segment_command *)cp)␊ |
| ␉␉␉␉if(strcmp(scp->segname, argv[2]) == 0)␊ |
| ␉␉␉␉{␊ |
| ␉␉␉␉␉printf("%ld\n", swap(scp->vmsize));␊ |
| #if 0␊ |
| ␉␉␉␉if (isDATA)␊ |
| ␉␉␉␉␉vmsize = swap(scp->filesize);␊ |
| ␉␉␉␉else␊ |
| ␉␉␉␉␉vmsize = swap(scp->vmsize);␊ |
| #endif␊ |
| ␉␉␉␉}␊ |
| ␉␉␉␉break;␊ |
| ␉␉}␊ |
| ␉␉␊ |
| ␉␉cp += swap(lcp->cmdsize);␊ |
| }␊ |
| ␉␊ |
| exit(0);␊ |
| }␊ |
