Annotation of sys/arch/macppc/stand/boot.mac/fixcoff.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: */
2: /* $NetBSD: fixcoff.c,v 1.10 2006/04/07 02:34:55 gdamore Exp $ */
3:
4: /*
5: * Copyright (c) 1999 National Aeronautics & Space Administration
6: * All rights reserved.
7: *
8: * This software was written by William Studenmund of the
9: * Numerical Aerospace Similation Facility, NASA Ames Research Center.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the National Aeronautics & Space Administration
20: * nor the names of its contributors may be used to endorse or promote
21: * products derived from this software without specific prior written
22: * permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE NATIONAL AERONAUTICS & SPACE ADMINISTRATION
25: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ADMINISTRATION OR CONTRIB-
28: * UTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
29: * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34: * POSSIBILITY OF SUCH DAMAGE.
35: */
36:
37: /*
38: * This program fixes up the extended xcoff headers generated when an elf
39: * file is turned into an xcoff one with the current objcopy. It should
40: * go away someday, when objcopy will correctly fix up the output xcoff
41: *
42: * Partially inspired by hack-coff, written by Paul Mackerras.
43: */
44:
45: #include <stdio.h>
46: #include <stdlib.h>
47: #include <unistd.h>
48: #include <fcntl.h>
49:
50: #include <sys/endian.h>
51:
52: struct filehdr {
53: #define U802WRMAGIC 0730
54: #define U802ROMAGIC 0735
55: #define U802TOCMAGIC 0737
56: char f_magic[2];
57: char f_nsect[2];
58: char f_time[4];
59: char f_symtab[4];
60: char f_nsyms[4];
61: char f_opthdr[2];
62: char f_flags[2];
63: };
64:
65: struct sectionhdr {
66: char s_name[8];
67: char s_paddr[4];
68: char s_vaddr[4];
69: char s_size[4];
70: char s_section[4];
71: char s_reloc[4];
72: char s_lineno[4];
73: char s_nreloc[2];
74: char s_nlineno[2];
75: char s_flags[4];
76: };
77:
78: struct aouthdr {
79: char magic[2];
80: char vstamp[2];
81: char tsize[4];
82: char dsize[4];
83: char bsize[4];
84: char entry[4];
85: char text_start[4];
86: char data_start[4];
87: #define SMALL_AOUTSZ 28
88: char o_toc[4];
89: char o_snentry[2];
90: char o_sntext[2];
91: char o_sndata[2];
92: char o_sntoc[2];
93: char o_snloader[2];
94: char o_snbss[2];
95: char o_algntext[2];
96: char o_algndata[2];
97: char o_modtype[2];
98: char o_cputype[2];
99: char o_maxstack[4];
100: char o_maxdata[4];
101: char o_resv2[12];
102: };
103: #define RS6K_AOUTHDR_ZMAGIC 0x010B
104:
105: char *progname;
106:
107: void
108: usage(char *prog)
109: {
110: fprintf(stderr, "Usage: %s [-h] | [<file to fix>]\n", prog);
111: }
112:
113: void
114: help(char *prog)
115: {
116: fprintf(stderr, "%s\tis designed to fix the xcoff headers in a\n",prog);
117: fprintf(stderr,
118: "\tbinary generated using objcopy from a non-xcoff source.\n");
119: usage(prog);
120: exit(0);
121: }
122:
123: main(int argc, char *argv[])
124: {
125: int fd, i, n, ch;
126: struct filehdr fh;
127: struct aouthdr aoh;
128: struct sectionhdr sh;
129:
130: progname = argv[0];
131: while ((ch = getopt(argc, argv, "h")) != -1)
132: switch (ch) {
133: case 'h':
134: help(progname);
135: }
136:
137: argc -= optind;
138: argv += optind;
139:
140: if (argc != 1) {
141: usage(progname);
142: exit(1);
143: }
144:
145: if ((fd = open(argv[0], O_RDWR, 0)) == -1)
146: err(i, "%s", argv[0]);
147:
148: /*
149: * Make sure it looks like an xcoff file..
150: */
151: if (read(fd, &fh, sizeof(fh)) != sizeof(fh))
152: err(1, "%s reading header", argv[0]);
153:
154: i = betoh16(*(uint16_t *)fh.f_magic);
155: if ((i != U802WRMAGIC) && (i != U802ROMAGIC) && (i != U802TOCMAGIC))
156: errx(1, "%s: not a valid xcoff file", argv[0]);
157:
158: /* Does the AOUT "Optional header" make sense? */
159: i = betoh16(*(uint16_t *)fh.f_opthdr);
160:
161: if (i == SMALL_AOUTSZ)
162: errx(1, "%s: file has small \"optional\" header, inappropriate for use with %s", argv[0], progname);
163: else if (i != sizeof(aoh))
164: errx(1, "%s: invalid \"optional\" header", argv[0]);
165:
166: if (read(fd, &aoh, i) != i)
167: err(1, "%s reading \"optional\" header", argv[0]);
168:
169: /* Now start filing in the AOUT header */
170: *(uint16_t *)aoh.magic = htobe16(RS6K_AOUTHDR_ZMAGIC);
171: n = betoh16(*(uint16_t *)fh.f_nsect);
172:
173: for (i = 0; i < n; i++) {
174: if (read(fd, &sh, sizeof(sh)) != sizeof(sh))
175: err(1, "%s reading section headers", argv[0]);
176: if (strcmp(sh.s_name, ".text") == 0) {
177: *(uint16_t *)(aoh.o_snentry) = htobe16(i+1);
178: *(uint16_t *)(aoh.o_sntext) = htobe16(i+1);
179: } else if (strcmp(sh.s_name, ".data") == 0) {
180: *(uint16_t *)(aoh.o_sndata) = htobe16(i+1);
181: } else if (strcmp(sh.s_name, ".bss") == 0) {
182: *(uint16_t *)(aoh.o_snbss) = htobe16(i+1);
183: }
184: }
185:
186: /* now write it out */
187: if (pwrite(fd, &aoh, sizeof(aoh), sizeof(struct filehdr)) !=
188: sizeof(aoh))
189: err(1, "%s writing modified header", argv[0]);
190: close(fd);
191: exit(0);
192: }
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