1 /* $OpenBSD: mopa.out.c,v 1.19 2024/10/16 18:47:48 miod Exp $ */
2
3 /*
4 * mopa.out - Convert a Unix format kernel into something that
5 * can be transferred via MOP.
6 *
7 * This code was written while referring to the NetBSD/vax boot
8 * loader. Therefore anything that can be booted by the Vax
9 * should be convertible with this program.
10 *
11 * If necessary, the a.out header is stripped, and the program
12 * segments are padded out. The BSS segment is zero filled.
13 * A header is prepended that looks like an IHD header. In
14 * particular the Unix machine ID is placed where mopd expects
15 * the image type to be (offset is IHD_W_ALIAS). If the machine
16 * ID could be mistaken for a DEC image type, then the conversion
17 * is aborted. The original a.out header is copied into the front
18 * of the header so that once we have detected the Unix machine
19 * ID we can haul the load address and the xfer address out.
20 */
21
22 /*
23 * Copyright (c) 1996 Lloyd Parkes. All rights reserved.
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the above copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. All advertising materials mentioning features or use of this software
34 * must display the following acknowledgement:
35 * This product includes software developed by Lloyd Parkes.
36 * 4. The name of the author may not be used to endorse or promote products
37 * derived from this software without specific prior written permission.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
40 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
42 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
43 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
45 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
46 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
47 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
48 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49 */
50
51 #include "os.h"
52 #include "common/common.h"
53 #include "common/mopdef.h"
54 #include "common/file.h"
55 #if defined(__OpenBSD__)
56 #include <a.out.h>
57 #endif
58 #if defined(__FreeBSD__)
59 #include <sys/imgact_aout.h>
60 #endif
61 #if defined(__bsdi__)
62 #include <a.out.h>
63 #define NOAOUT
64 #endif
65 #if !defined(MID_VAX)
66 #define MID_VAX 140
67 #endif
68
69 #ifndef NOELF
70 #if defined(__NetBSD__) || defined(__OpenBSD__)
71 #include <elf.h>
72 #else
73 #define NOELF
74 #endif
75 #endif
76
77 #ifndef NOELF
78 #if !defined(_LP64)
79 #define NOELF64
80 #endif
81 #endif
82
83 u_char header[512]; /* The MOP header we generate is 1 block. */
84 #if !defined(NOAOUT)
85 struct exec ex, ex_swap;
86 #endif
87
88 int
main(int argc,char ** argv)89 main (int argc, char **argv)
90 {
91 FILE *out; /* A FILE because that is easier. */
92 int i, j;
93 struct dllist dl;
94 short image_type;
95
96 #ifdef NOAOUT
97 fprintf(stderr, "%s: has no function in OS/BSD\n", argv[0]);
98 return(1);
99 #endif
100
101 if (argc != 3) {
102 fprintf (stderr, "usage: %s infile outfile\n", argv[0]);
103 return (1);
104 }
105
106 dl.ldfd = open (argv[1], O_RDONLY);
107 if (dl.ldfd == -1)
108 err(2, "open `%s'", argv[1]);
109
110 if (GetFileInfo(&dl, 0) == -1)
111 errx(3, "`%s' is an unknown file type", argv[1]);
112
113 switch (dl.image_type) {
114 case IMAGE_TYPE_MOP:
115 errx(3, "`%s' is already a MOP image", argv[1]);
116 break;
117
118 #ifndef NOELF
119 case IMAGE_TYPE_ELF32:
120 if (dl.e_machine != EM_VAX)
121 printf("WARNING: `%s' is not a VAX image "
122 "(machine=%d)\n", argv[1], dl.e_machine);
123 for (i = 0, j = 0; j < dl.e_nsec; j++)
124 i += dl.e_sections[j].s_fsize + dl.e_sections[j].s_pad;
125 image_type = IHD_C_NATIVE;
126 break;
127 #endif
128
129 #if !defined(NOELF) && !defined(NOELF64)
130 case IMAGE_TYPE_ELF64:
131 if (dl.e_machine != EM_ALPHA && dl.e_machine != EM_ALPHA_EXP)
132 printf("WARNING: `%s' is not an ALPHA image "
133 "(machine=%d)\n", argv[1], dl.e_machine);
134 for (i = 0, j = 0; j < dl.e_nsec; j++)
135 i += dl.e_sections[j].s_fsize + dl.e_sections[j].s_pad;
136 image_type = IHD_C_ALPHA;
137 break;
138 #endif
139
140 #ifndef NOAOUT
141 case IMAGE_TYPE_AOUT:
142 if (dl.a_mid != MID_VAX)
143 printf("WARNING: `%s' is not a VAX image (mid=%d)\n",
144 argv[1], dl.a_mid);
145 i = dl.a_text + dl.a_text_fill + dl.a_data + dl.a_data_fill +
146 dl.a_bss + dl.a_bss_fill;
147 image_type = IHD_C_NATIVE;
148 break;
149 #endif
150
151 default:
152 errx(3, "Image type `%s' not supported",
153 FileTypeName(dl.image_type));
154 }
155
156 dl.nloadaddr = dl.loadaddr;
157 dl.lseek = lseek(dl.ldfd,0L,SEEK_CUR);
158 dl.a_lseek = 0;
159 dl.count = 0;
160 dl.dl_bsz = 512;
161
162 switch (image_type) {
163 default:
164 case IHD_C_NATIVE:
165 /* Offset to ISD section. */
166 mopFilePutLX(header, IHD_W_SIZE, 0xd4, 2);
167 /* Offset to 1st section.*/
168 mopFilePutLX(header, IHD_W_ACTIVOFF, 0x30, 2);
169 /* It's a VAX image.*/
170 mopFilePutLX(header, IHD_W_ALIAS, IHD_C_NATIVE, 2);
171 /* Only one header block. */
172 mopFilePutLX(header, IHD_B_HDRBLKCNT, 1, 1);
173
174 /* Xfer Addr */
175 mopFilePutLX(header, 0x30 + IHA_L_TFRADR1, dl.xferaddr, 4);
176
177 /* load Addr */
178 mopFilePutLX(header, 0xd4 + ISD_V_VPN, dl.loadaddr / 512, 2);
179 /* Imagesize in blks.*/
180 i = (i + 1) / 512;
181 mopFilePutLX(header, 0xd4 + ISD_W_PAGCNT, i, 2);
182 break;
183 case IHD_C_ALPHA:
184 /* Offset to ISD section. */
185 mopFilePutLX(header, EIHD_L_ISDOFF, 0xd4, 4);
186 /* It's an alpha image.*/
187 mopFilePutLX(header, IHD_W_ALIAS, IHD_C_ALPHA, 2);
188 /* Only one header block. */
189 mopFilePutLX(header, EIHD_L_HDRBLKCNT, 1, 4);
190
191 /* Imagesize in bytes.*/
192 mopFilePutLX(header, 0xd4 + EISD_L_SECSIZE, i, 4);
193 break;
194 }
195
196 out = fopen (argv[2], "w");
197 if (!out)
198 err(2, "writing `%s'", argv[2]);
199
200 /* Now we do the actual work. Write MOP-image header */
201
202 fwrite (header, sizeof (header), 1, out);
203
204 switch (dl.image_type) {
205 case IMAGE_TYPE_MOP:
206 abort();
207
208 case IMAGE_TYPE_ELF32:
209 #ifdef NOELF
210 abort();
211 #else
212 fprintf(stderr, "copying ");
213 for (j = 0; j < dl.e_nsec; j++)
214 fprintf(stderr, "%s%u+%u", j == 0 ? "" : "+",
215 dl.e_sections[j].s_fsize,
216 dl.e_sections[j].s_pad);
217 fprintf(stderr, "->0x%x\n", dl.xferaddr);
218 #endif
219 break;
220
221 case IMAGE_TYPE_AOUT:
222 #ifdef NOAOUT
223 abort();
224 #else
225 fprintf(stderr, "copying %u+%u+%u->0x%x\n", dl.a_text,
226 dl.a_data, dl.a_bss, dl.xferaddr);
227 #endif
228 break;
229 default:
230 break;
231 }
232
233 while ((i = mopFileRead(&dl,header)) > 0) {
234 (void)fwrite(header, i, 1, out);
235 }
236
237 fclose (out);
238 exit(0);
239 }
240