1 /* $NetBSD: fixcoff.c,v 1.13 2024/10/29 11:37:57 kre Exp $ */ 2 3 /* 4 * Copyright (c) 1999 National Aeronautics & Space Administration 5 * All rights reserved. 6 * 7 * This software was written by William Studenmund of the 8 * Numerical Aerospace Similation Facility, NASA Ames Research Center. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the National Aeronautics & Space Administration 19 * nor the names of its contributors may be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB- 27 * UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 28 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * This program fixes up the extended xcoff headers generated when an elf 38 * file is turned into an xcoff one with the current objcopy. It should 39 * go away someday, when objcopy will correctly fix up the output xcoff 40 * 41 * Partially inspired by hack-coff, written by Paul Mackerras. 42 */ 43 44 #if HAVE_NBTOOL_CONFIG_H 45 #include "nbtool_config.h" 46 #else /* HAVE_NBTOOL_CONFIG_H */ 47 #include <sys/endian.h> 48 #endif /* HAVE_NBTOOL_CONFIG_H */ 49 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 #include <fcntl.h> 54 55 struct filehdr { 56 #define U802WRMAGIC 0730 57 #define U802ROMAGIC 0735 58 #define U802TOCMAGIC 0737 59 char f_magic[2]; 60 char f_nsect[2]; 61 char f_time[4]; 62 char f_symtab[4]; 63 char f_nsyms[4]; 64 char f_opthdr[2]; 65 char f_flags[2]; 66 }; 67 68 struct sectionhdr { 69 char s_name[8]; 70 char s_paddr[4]; 71 char s_vaddr[4]; 72 char s_size[4]; 73 char s_section[4]; 74 char s_reloc[4]; 75 char s_lineno[4]; 76 char s_nreloc[2]; 77 char s_nlineno[2]; 78 char s_flags[4]; 79 }; 80 81 struct aouthdr { 82 char magic[2]; 83 char vstamp[2]; 84 char tsize[4]; 85 char dsize[4]; 86 char bsize[4]; 87 char entry[4]; 88 char text_start[4]; 89 char data_start[4]; 90 #define SMALL_AOUTSZ 28 91 char o_toc[4]; 92 char o_snentry[2]; 93 char o_sntext[2]; 94 char o_sndata[2]; 95 char o_sntoc[2]; 96 char o_snloader[2]; 97 char o_snbss[2]; 98 char o_algntext[2]; 99 char o_algndata[2]; 100 char o_modtype[2]; 101 char o_cputype[2]; 102 char o_maxstack[4]; 103 char o_maxdata[4]; 104 char o_resv2[12]; 105 }; 106 #define RS6K_AOUTHDR_ZMAGIC 0x010B 107 108 void 109 usage(const char *prog) 110 { 111 fprintf(stderr, "Usage: %s [-h] | [<file to fix>]\n", prog); 112 } 113 114 void 115 help(const char *prog) 116 { 117 fprintf(stderr, "%s\tis designed to fix the xcoff headers in a\n",prog); 118 fprintf(stderr, 119 "\tbinary generated using objcopy from a non-xcoff source.\n"); 120 usage(prog); 121 exit(0); 122 } 123 124 int 125 main(int argc, char * const *argv) 126 { 127 int fd, i, n, ch; 128 struct filehdr fh; 129 struct aouthdr aoh; 130 struct sectionhdr sh; 131 132 while ((ch = getopt(argc, argv, "h")) != -1) 133 switch (ch) { 134 case 'h': 135 help(getprogname()); 136 } 137 138 argc -= optind; 139 argv += optind; 140 141 if (argc != 1) { 142 usage(getprogname()); 143 exit(1); 144 } 145 146 if ((fd = open(argv[0], O_RDWR, 0)) == -1) 147 err(i, "%s", argv[0]); 148 149 /* 150 * Make sure it looks like an xcoff file.. 151 */ 152 if (read(fd, &fh, sizeof(fh)) != sizeof(fh)) 153 err(1, "%s reading header", argv[0]); 154 155 i = be16toh(*(uint16_t *)fh.f_magic); 156 if ((i != U802WRMAGIC) && (i != U802ROMAGIC) && (i != U802TOCMAGIC)) 157 errx(1, "%s: not a valid xcoff file", argv[0]); 158 159 /* Does the AOUT "Optional header" make sense? */ 160 i = be16toh(*(uint16_t *)fh.f_opthdr); 161 162 if (i == SMALL_AOUTSZ) 163 errx(1, "%s: file has small \"optional\" header, inappropriate for use with %s", argv[0], getprogname()); 164 else if (i != sizeof(aoh)) 165 errx(1, "%s: invalid \"optional\" header", argv[0]); 166 167 if (read(fd, &aoh, i) != i) 168 err(1, "%s reading \"optional\" header", argv[0]); 169 170 /* Now start filing in the AOUT header */ 171 *(uint16_t *)aoh.magic = htobe16(RS6K_AOUTHDR_ZMAGIC); 172 n = be16toh(*(uint16_t *)fh.f_nsect); 173 174 for (i = 0; i < n; i++) { 175 if (read(fd, &sh, sizeof(sh)) != sizeof(sh)) 176 err(1, "%s reading section headers", argv[0]); 177 if (strcmp(sh.s_name, ".text") == 0) { 178 *(uint16_t *)(aoh.o_snentry) = htobe16(i+1); 179 *(uint16_t *)(aoh.o_sntext) = htobe16(i+1); 180 } else if (strcmp(sh.s_name, ".data") == 0) { 181 *(uint16_t *)(aoh.o_sndata) = htobe16(i+1); 182 } else if (strcmp(sh.s_name, ".bss") == 0) { 183 *(uint16_t *)(aoh.o_snbss) = htobe16(i+1); 184 } 185 } 186 187 /* now write it out */ 188 if (pwrite(fd, &aoh, sizeof(aoh), sizeof(struct filehdr)) 189 != sizeof(aoh)) 190 err(1, "%s writing modified header", argv[0]); 191 close(fd); 192 exit(0); 193 } 194
Indexes created Sun Oct 25 00:26:45 UTC 2026