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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 1995 | |
3 | * Ted Lemon (hereinafter referred to as the author) | |
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 | * 3. The name of the author may not be used to endorse or promote products | |
14 | * derived from this software without specific prior written permission. | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND | |
17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE | |
20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
26 | * SUCH DAMAGE. | |
27 | */ | |
28 | ||
29 | /* elf2ecoff.c | |
30 | ||
31 | This program converts an elf executable to an ECOFF executable. | |
32 | No symbol table is retained. This is useful primarily in building | |
33 | net-bootable kernels for machines (e.g., DECstation and Alpha) which | |
34 | only support the ECOFF object file format. */ | |
35 | ||
36 | #include <stdio.h> | |
37 | #include <string.h> | |
38 | #include <errno.h> | |
39 | #include <sys/types.h> | |
40 | #include <fcntl.h> | |
41 | #include <unistd.h> | |
42 | #include <elf.h> | |
43 | #include <limits.h> | |
44 | #include <netinet/in.h> | |
45 | #include <stdlib.h> | |
46 | ||
47 | #include "ecoff.h" | |
48 | ||
49 | /* | |
50 | * Some extra ELF definitions | |
51 | */ | |
52 | #define PT_MIPS_REGINFO 0x70000000 /* Register usage information */ | |
53 | ||
54 | /* -------------------------------------------------------------------- */ | |
55 | ||
56 | struct sect { | |
57 | unsigned long vaddr; | |
58 | unsigned long len; | |
59 | }; | |
60 | ||
61 | int *symTypeTable; | |
62 | int must_convert_endian = 0; | |
63 | int format_bigendian = 0; | |
64 | ||
65 | static void copy(int out, int in, off_t offset, off_t size) | |
66 | { | |
67 | char ibuf[4096]; | |
68 | int remaining, cur, count; | |
69 | ||
70 | /* Go to the start of the ELF symbol table... */ | |
71 | if (lseek(in, offset, SEEK_SET) < 0) { | |
72 | perror("copy: lseek"); | |
73 | exit(1); | |
74 | } | |
75 | ||
76 | remaining = size; | |
77 | while (remaining) { | |
78 | cur = remaining; | |
79 | if (cur > sizeof ibuf) | |
80 | cur = sizeof ibuf; | |
81 | remaining -= cur; | |
82 | if ((count = read(in, ibuf, cur)) != cur) { | |
83 | fprintf(stderr, "copy: read: %s\n", | |
84 | count ? strerror(errno) : | |
85 | "premature end of file"); | |
86 | exit(1); | |
87 | } | |
88 | if ((count = write(out, ibuf, cur)) != cur) { | |
89 | perror("copy: write"); | |
90 | exit(1); | |
91 | } | |
92 | } | |
93 | } | |
94 | ||
95 | /* | |
96 | * Combine two segments, which must be contiguous. If pad is true, it's | |
97 | * okay for there to be padding between. | |
98 | */ | |
99 | static void combine(struct sect *base, struct sect *new, int pad) | |
100 | { | |
101 | if (!base->len) | |
102 | *base = *new; | |
103 | else if (new->len) { | |
104 | if (base->vaddr + base->len != new->vaddr) { | |
105 | if (pad) | |
106 | base->len = new->vaddr - base->vaddr; | |
107 | else { | |
108 | fprintf(stderr, | |
109 | "Non-contiguous data can't be converted.\n"); | |
110 | exit(1); | |
111 | } | |
112 | } | |
113 | base->len += new->len; | |
114 | } | |
115 | } | |
116 | ||
117 | static int phcmp(const void *v1, const void *v2) | |
118 | { | |
119 | const Elf32_Phdr *h1 = v1; | |
120 | const Elf32_Phdr *h2 = v2; | |
121 | ||
122 | if (h1->p_vaddr > h2->p_vaddr) | |
123 | return 1; | |
124 | else if (h1->p_vaddr < h2->p_vaddr) | |
125 | return -1; | |
126 | else | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static char *saveRead(int file, off_t offset, off_t len, char *name) | |
131 | { | |
132 | char *tmp; | |
133 | int count; | |
134 | off_t off; | |
135 | if ((off = lseek(file, offset, SEEK_SET)) < 0) { | |
136 | fprintf(stderr, "%s: fseek: %s\n", name, strerror(errno)); | |
137 | exit(1); | |
138 | } | |
139 | if (!(tmp = (char *) malloc(len))) { | |
140 | fprintf(stderr, "%s: Can't allocate %ld bytes.\n", name, | |
141 | len); | |
142 | exit(1); | |
143 | } | |
144 | count = read(file, tmp, len); | |
145 | if (count != len) { | |
146 | fprintf(stderr, "%s: read: %s.\n", | |
147 | name, | |
148 | count ? strerror(errno) : "End of file reached"); | |
149 | exit(1); | |
150 | } | |
151 | return tmp; | |
152 | } | |
153 | ||
154 | #define swab16(x) \ | |
155 | ((unsigned short)( \ | |
156 | (((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \ | |
157 | (((unsigned short)(x) & (unsigned short)0xff00U) >> 8) )) | |
158 | ||
159 | #define swab32(x) \ | |
160 | ((unsigned int)( \ | |
161 | (((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \ | |
162 | (((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \ | |
163 | (((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \ | |
164 | (((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) )) | |
165 | ||
166 | static void convert_elf_hdr(Elf32_Ehdr * e) | |
167 | { | |
168 | e->e_type = swab16(e->e_type); | |
169 | e->e_machine = swab16(e->e_machine); | |
170 | e->e_version = swab32(e->e_version); | |
171 | e->e_entry = swab32(e->e_entry); | |
172 | e->e_phoff = swab32(e->e_phoff); | |
173 | e->e_shoff = swab32(e->e_shoff); | |
174 | e->e_flags = swab32(e->e_flags); | |
175 | e->e_ehsize = swab16(e->e_ehsize); | |
176 | e->e_phentsize = swab16(e->e_phentsize); | |
177 | e->e_phnum = swab16(e->e_phnum); | |
178 | e->e_shentsize = swab16(e->e_shentsize); | |
179 | e->e_shnum = swab16(e->e_shnum); | |
180 | e->e_shstrndx = swab16(e->e_shstrndx); | |
181 | } | |
182 | ||
183 | static void convert_elf_phdrs(Elf32_Phdr * p, int num) | |
184 | { | |
185 | int i; | |
186 | ||
187 | for (i = 0; i < num; i++, p++) { | |
188 | p->p_type = swab32(p->p_type); | |
189 | p->p_offset = swab32(p->p_offset); | |
190 | p->p_vaddr = swab32(p->p_vaddr); | |
191 | p->p_paddr = swab32(p->p_paddr); | |
192 | p->p_filesz = swab32(p->p_filesz); | |
193 | p->p_memsz = swab32(p->p_memsz); | |
194 | p->p_flags = swab32(p->p_flags); | |
195 | p->p_align = swab32(p->p_align); | |
196 | } | |
197 | ||
198 | } | |
199 | ||
200 | static void convert_elf_shdrs(Elf32_Shdr * s, int num) | |
201 | { | |
202 | int i; | |
203 | ||
204 | for (i = 0; i < num; i++, s++) { | |
205 | s->sh_name = swab32(s->sh_name); | |
206 | s->sh_type = swab32(s->sh_type); | |
207 | s->sh_flags = swab32(s->sh_flags); | |
208 | s->sh_addr = swab32(s->sh_addr); | |
209 | s->sh_offset = swab32(s->sh_offset); | |
210 | s->sh_size = swab32(s->sh_size); | |
211 | s->sh_link = swab32(s->sh_link); | |
212 | s->sh_info = swab32(s->sh_info); | |
213 | s->sh_addralign = swab32(s->sh_addralign); | |
214 | s->sh_entsize = swab32(s->sh_entsize); | |
215 | } | |
216 | } | |
217 | ||
218 | static void convert_ecoff_filehdr(struct filehdr *f) | |
219 | { | |
220 | f->f_magic = swab16(f->f_magic); | |
221 | f->f_nscns = swab16(f->f_nscns); | |
222 | f->f_timdat = swab32(f->f_timdat); | |
223 | f->f_symptr = swab32(f->f_symptr); | |
224 | f->f_nsyms = swab32(f->f_nsyms); | |
225 | f->f_opthdr = swab16(f->f_opthdr); | |
226 | f->f_flags = swab16(f->f_flags); | |
227 | } | |
228 | ||
229 | static void convert_ecoff_aouthdr(struct aouthdr *a) | |
230 | { | |
231 | a->magic = swab16(a->magic); | |
232 | a->vstamp = swab16(a->vstamp); | |
233 | a->tsize = swab32(a->tsize); | |
234 | a->dsize = swab32(a->dsize); | |
235 | a->bsize = swab32(a->bsize); | |
236 | a->entry = swab32(a->entry); | |
237 | a->text_start = swab32(a->text_start); | |
238 | a->data_start = swab32(a->data_start); | |
239 | a->bss_start = swab32(a->bss_start); | |
240 | a->gprmask = swab32(a->gprmask); | |
241 | a->cprmask[0] = swab32(a->cprmask[0]); | |
242 | a->cprmask[1] = swab32(a->cprmask[1]); | |
243 | a->cprmask[2] = swab32(a->cprmask[2]); | |
244 | a->cprmask[3] = swab32(a->cprmask[3]); | |
245 | a->gp_value = swab32(a->gp_value); | |
246 | } | |
247 | ||
248 | static void convert_ecoff_esecs(struct scnhdr *s, int num) | |
249 | { | |
250 | int i; | |
251 | ||
252 | for (i = 0; i < num; i++, s++) { | |
253 | s->s_paddr = swab32(s->s_paddr); | |
254 | s->s_vaddr = swab32(s->s_vaddr); | |
255 | s->s_size = swab32(s->s_size); | |
256 | s->s_scnptr = swab32(s->s_scnptr); | |
257 | s->s_relptr = swab32(s->s_relptr); | |
258 | s->s_lnnoptr = swab32(s->s_lnnoptr); | |
259 | s->s_nreloc = swab16(s->s_nreloc); | |
260 | s->s_nlnno = swab16(s->s_nlnno); | |
261 | s->s_flags = swab32(s->s_flags); | |
262 | } | |
263 | } | |
264 | ||
265 | int main(int argc, char *argv[]) | |
266 | { | |
267 | Elf32_Ehdr ex; | |
268 | Elf32_Phdr *ph; | |
269 | Elf32_Shdr *sh; | |
270 | char *shstrtab; | |
271 | int i, pad; | |
272 | struct sect text, data, bss; | |
273 | struct filehdr efh; | |
274 | struct aouthdr eah; | |
275 | struct scnhdr esecs[6]; | |
276 | int infile, outfile; | |
277 | unsigned long cur_vma = ULONG_MAX; | |
278 | int addflag = 0; | |
279 | int nosecs; | |
280 | ||
281 | text.len = data.len = bss.len = 0; | |
282 | text.vaddr = data.vaddr = bss.vaddr = 0; | |
283 | ||
284 | /* Check args... */ | |
285 | if (argc < 3 || argc > 4) { | |
286 | usage: | |
287 | fprintf(stderr, | |
288 | "usage: elf2ecoff <elf executable> <ecoff executable> [-a]\n"); | |
289 | exit(1); | |
290 | } | |
291 | if (argc == 4) { | |
292 | if (strcmp(argv[3], "-a")) | |
293 | goto usage; | |
294 | addflag = 1; | |
295 | } | |
296 | ||
297 | /* Try the input file... */ | |
298 | if ((infile = open(argv[1], O_RDONLY)) < 0) { | |
299 | fprintf(stderr, "Can't open %s for read: %s\n", | |
300 | argv[1], strerror(errno)); | |
301 | exit(1); | |
302 | } | |
303 | ||
304 | /* Read the header, which is at the beginning of the file... */ | |
305 | i = read(infile, &ex, sizeof ex); | |
306 | if (i != sizeof ex) { | |
307 | fprintf(stderr, "ex: %s: %s.\n", | |
308 | argv[1], | |
309 | i ? strerror(errno) : "End of file reached"); | |
310 | exit(1); | |
311 | } | |
312 | ||
313 | if (ex.e_ident[EI_DATA] == ELFDATA2MSB) | |
314 | format_bigendian = 1; | |
315 | ||
316 | if (ntohs(0xaa55) == 0xaa55) { | |
317 | if (!format_bigendian) | |
318 | must_convert_endian = 1; | |
319 | } else { | |
320 | if (format_bigendian) | |
321 | must_convert_endian = 1; | |
322 | } | |
323 | if (must_convert_endian) | |
324 | convert_elf_hdr(&ex); | |
325 | ||
326 | /* Read the program headers... */ | |
327 | ph = (Elf32_Phdr *) saveRead(infile, ex.e_phoff, | |
328 | ex.e_phnum * sizeof(Elf32_Phdr), | |
329 | "ph"); | |
330 | if (must_convert_endian) | |
331 | convert_elf_phdrs(ph, ex.e_phnum); | |
332 | /* Read the section headers... */ | |
333 | sh = (Elf32_Shdr *) saveRead(infile, ex.e_shoff, | |
334 | ex.e_shnum * sizeof(Elf32_Shdr), | |
335 | "sh"); | |
336 | if (must_convert_endian) | |
337 | convert_elf_shdrs(sh, ex.e_shnum); | |
338 | /* Read in the section string table. */ | |
339 | shstrtab = saveRead(infile, sh[ex.e_shstrndx].sh_offset, | |
340 | sh[ex.e_shstrndx].sh_size, "shstrtab"); | |
341 | ||
342 | /* Figure out if we can cram the program header into an ECOFF | |
343 | header... Basically, we can't handle anything but loadable | |
344 | segments, but we can ignore some kinds of segments. We can't | |
345 | handle holes in the address space. Segments may be out of order, | |
346 | so we sort them first. */ | |
347 | ||
348 | qsort(ph, ex.e_phnum, sizeof(Elf32_Phdr), phcmp); | |
349 | ||
350 | for (i = 0; i < ex.e_phnum; i++) { | |
351 | /* Section types we can ignore... */ | |
352 | if (ph[i].p_type == PT_NULL || ph[i].p_type == PT_NOTE || | |
353 | ph[i].p_type == PT_PHDR | |
354 | || ph[i].p_type == PT_MIPS_REGINFO) | |
355 | continue; | |
356 | /* Section types we can't handle... */ | |
357 | else if (ph[i].p_type != PT_LOAD) { | |
358 | fprintf(stderr, | |
359 | "Program header %d type %d can't be converted.\n", | |
360 | ex.e_phnum, ph[i].p_type); | |
361 | exit(1); | |
362 | } | |
363 | /* Writable (data) segment? */ | |
364 | if (ph[i].p_flags & PF_W) { | |
365 | struct sect ndata, nbss; | |
366 | ||
367 | ndata.vaddr = ph[i].p_vaddr; | |
368 | ndata.len = ph[i].p_filesz; | |
369 | nbss.vaddr = ph[i].p_vaddr + ph[i].p_filesz; | |
370 | nbss.len = ph[i].p_memsz - ph[i].p_filesz; | |
371 | ||
372 | combine(&data, &ndata, 0); | |
373 | combine(&bss, &nbss, 1); | |
374 | } else { | |
375 | struct sect ntxt; | |
376 | ||
377 | ntxt.vaddr = ph[i].p_vaddr; | |
378 | ntxt.len = ph[i].p_filesz; | |
379 | ||
380 | combine(&text, &ntxt, 0); | |
381 | } | |
382 | /* Remember the lowest segment start address. */ | |
383 | if (ph[i].p_vaddr < cur_vma) | |
384 | cur_vma = ph[i].p_vaddr; | |
385 | } | |
386 | ||
387 | /* Sections must be in order to be converted... */ | |
388 | if (text.vaddr > data.vaddr || data.vaddr > bss.vaddr || | |
389 | text.vaddr + text.len > data.vaddr | |
390 | || data.vaddr + data.len > bss.vaddr) { | |
391 | fprintf(stderr, | |
392 | "Sections ordering prevents a.out conversion.\n"); | |
393 | exit(1); | |
394 | } | |
395 | ||
396 | /* If there's a data section but no text section, then the loader | |
397 | combined everything into one section. That needs to be the | |
398 | text section, so just make the data section zero length following | |
399 | text. */ | |
400 | if (data.len && !text.len) { | |
401 | text = data; | |
402 | data.vaddr = text.vaddr + text.len; | |
403 | data.len = 0; | |
404 | } | |
405 | ||
406 | /* If there is a gap between text and data, we'll fill it when we copy | |
407 | the data, so update the length of the text segment as represented in | |
408 | a.out to reflect that, since a.out doesn't allow gaps in the program | |
409 | address space. */ | |
410 | if (text.vaddr + text.len < data.vaddr) | |
411 | text.len = data.vaddr - text.vaddr; | |
412 | ||
413 | /* We now have enough information to cons up an a.out header... */ | |
414 | eah.magic = OMAGIC; | |
415 | eah.vstamp = 200; | |
416 | eah.tsize = text.len; | |
417 | eah.dsize = data.len; | |
418 | eah.bsize = bss.len; | |
419 | eah.entry = ex.e_entry; | |
420 | eah.text_start = text.vaddr; | |
421 | eah.data_start = data.vaddr; | |
422 | eah.bss_start = bss.vaddr; | |
423 | eah.gprmask = 0xf3fffffe; | |
424 | memset(&eah.cprmask, '\0', sizeof eah.cprmask); | |
425 | eah.gp_value = 0; /* unused. */ | |
426 | ||
427 | if (format_bigendian) | |
428 | efh.f_magic = MIPSEBMAGIC; | |
429 | else | |
430 | efh.f_magic = MIPSELMAGIC; | |
431 | if (addflag) | |
432 | nosecs = 6; | |
433 | else | |
434 | nosecs = 3; | |
435 | efh.f_nscns = nosecs; | |
436 | efh.f_timdat = 0; /* bogus */ | |
437 | efh.f_symptr = 0; | |
438 | efh.f_nsyms = 0; | |
439 | efh.f_opthdr = sizeof eah; | |
440 | efh.f_flags = 0x100f; /* Stripped, not sharable. */ | |
441 | ||
442 | memset(esecs, 0, sizeof esecs); | |
443 | strcpy(esecs[0].s_name, ".text"); | |
444 | strcpy(esecs[1].s_name, ".data"); | |
445 | strcpy(esecs[2].s_name, ".bss"); | |
446 | if (addflag) { | |
447 | strcpy(esecs[3].s_name, ".rdata"); | |
448 | strcpy(esecs[4].s_name, ".sdata"); | |
449 | strcpy(esecs[5].s_name, ".sbss"); | |
450 | } | |
451 | esecs[0].s_paddr = esecs[0].s_vaddr = eah.text_start; | |
452 | esecs[1].s_paddr = esecs[1].s_vaddr = eah.data_start; | |
453 | esecs[2].s_paddr = esecs[2].s_vaddr = eah.bss_start; | |
454 | if (addflag) { | |
455 | esecs[3].s_paddr = esecs[3].s_vaddr = 0; | |
456 | esecs[4].s_paddr = esecs[4].s_vaddr = 0; | |
457 | esecs[5].s_paddr = esecs[5].s_vaddr = 0; | |
458 | } | |
459 | esecs[0].s_size = eah.tsize; | |
460 | esecs[1].s_size = eah.dsize; | |
461 | esecs[2].s_size = eah.bsize; | |
462 | if (addflag) { | |
463 | esecs[3].s_size = 0; | |
464 | esecs[4].s_size = 0; | |
465 | esecs[5].s_size = 0; | |
466 | } | |
467 | esecs[0].s_scnptr = N_TXTOFF(efh, eah); | |
468 | esecs[1].s_scnptr = N_DATOFF(efh, eah); | |
469 | #define ECOFF_SEGMENT_ALIGNMENT(a) 0x10 | |
470 | #define ECOFF_ROUND(s,a) (((s)+(a)-1)&~((a)-1)) | |
471 | esecs[2].s_scnptr = esecs[1].s_scnptr + | |
472 | ECOFF_ROUND(esecs[1].s_size, ECOFF_SEGMENT_ALIGNMENT(&eah)); | |
473 | if (addflag) { | |
474 | esecs[3].s_scnptr = 0; | |
475 | esecs[4].s_scnptr = 0; | |
476 | esecs[5].s_scnptr = 0; | |
477 | } | |
478 | esecs[0].s_relptr = esecs[1].s_relptr = esecs[2].s_relptr = 0; | |
479 | esecs[0].s_lnnoptr = esecs[1].s_lnnoptr = esecs[2].s_lnnoptr = 0; | |
480 | esecs[0].s_nreloc = esecs[1].s_nreloc = esecs[2].s_nreloc = 0; | |
481 | esecs[0].s_nlnno = esecs[1].s_nlnno = esecs[2].s_nlnno = 0; | |
482 | if (addflag) { | |
483 | esecs[3].s_relptr = esecs[4].s_relptr | |
484 | = esecs[5].s_relptr = 0; | |
485 | esecs[3].s_lnnoptr = esecs[4].s_lnnoptr | |
486 | = esecs[5].s_lnnoptr = 0; | |
487 | esecs[3].s_nreloc = esecs[4].s_nreloc = esecs[5].s_nreloc = | |
488 | 0; | |
489 | esecs[3].s_nlnno = esecs[4].s_nlnno = esecs[5].s_nlnno = 0; | |
490 | } | |
491 | esecs[0].s_flags = 0x20; | |
492 | esecs[1].s_flags = 0x40; | |
493 | esecs[2].s_flags = 0x82; | |
494 | if (addflag) { | |
495 | esecs[3].s_flags = 0x100; | |
496 | esecs[4].s_flags = 0x200; | |
497 | esecs[5].s_flags = 0x400; | |
498 | } | |
499 | ||
500 | /* Make the output file... */ | |
501 | if ((outfile = open(argv[2], O_WRONLY | O_CREAT, 0777)) < 0) { | |
502 | fprintf(stderr, "Unable to create %s: %s\n", argv[2], | |
503 | strerror(errno)); | |
504 | exit(1); | |
505 | } | |
506 | ||
507 | if (must_convert_endian) | |
508 | convert_ecoff_filehdr(&efh); | |
509 | /* Write the headers... */ | |
510 | i = write(outfile, &efh, sizeof efh); | |
511 | if (i != sizeof efh) { | |
512 | perror("efh: write"); | |
513 | exit(1); | |
514 | ||
515 | for (i = 0; i < nosecs; i++) { | |
516 | printf | |
517 | ("Section %d: %s phys %lx size %lx file offset %lx\n", | |
518 | i, esecs[i].s_name, esecs[i].s_paddr, | |
519 | esecs[i].s_size, esecs[i].s_scnptr); | |
520 | } | |
521 | } | |
522 | fprintf(stderr, "wrote %d byte file header.\n", i); | |
523 | ||
524 | if (must_convert_endian) | |
525 | convert_ecoff_aouthdr(&eah); | |
526 | i = write(outfile, &eah, sizeof eah); | |
527 | if (i != sizeof eah) { | |
528 | perror("eah: write"); | |
529 | exit(1); | |
530 | } | |
531 | fprintf(stderr, "wrote %d byte a.out header.\n", i); | |
532 | ||
533 | if (must_convert_endian) | |
534 | convert_ecoff_esecs(&esecs[0], nosecs); | |
535 | i = write(outfile, &esecs, nosecs * sizeof(struct scnhdr)); | |
536 | if (i != nosecs * sizeof(struct scnhdr)) { | |
537 | perror("esecs: write"); | |
538 | exit(1); | |
539 | } | |
540 | fprintf(stderr, "wrote %d bytes of section headers.\n", i); | |
541 | ||
542 | pad = (sizeof(efh) + sizeof(eah) + nosecs * sizeof(struct scnhdr)) & 15; | |
543 | if (pad) { | |
544 | pad = 16 - pad; | |
545 | i = write(outfile, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0", pad); | |
546 | if (i < 0) { | |
547 | perror("ipad: write"); | |
548 | exit(1); | |
549 | } | |
550 | fprintf(stderr, "wrote %d byte pad.\n", i); | |
551 | } | |
552 | ||
553 | /* | |
554 | * Copy the loadable sections. Zero-fill any gaps less than 64k; | |
555 | * complain about any zero-filling, and die if we're asked to zero-fill | |
556 | * more than 64k. | |
557 | */ | |
558 | for (i = 0; i < ex.e_phnum; i++) { | |
559 | /* Unprocessable sections were handled above, so just verify that | |
560 | the section can be loaded before copying. */ | |
561 | if (ph[i].p_type == PT_LOAD && ph[i].p_filesz) { | |
562 | if (cur_vma != ph[i].p_vaddr) { | |
563 | unsigned long gap = | |
564 | ph[i].p_vaddr - cur_vma; | |
565 | char obuf[1024]; | |
566 | if (gap > 65536) { | |
567 | fprintf(stderr, | |
568 | "Intersegment gap (%ld bytes) too large.\n", | |
569 | gap); | |
570 | exit(1); | |
571 | } | |
572 | fprintf(stderr, | |
573 | "Warning: %ld byte intersegment gap.\n", | |
574 | gap); | |
575 | memset(obuf, 0, sizeof obuf); | |
576 | while (gap) { | |
577 | int count = | |
578 | write(outfile, obuf, | |
579 | (gap > | |
580 | sizeof obuf ? sizeof | |
581 | obuf : gap)); | |
582 | if (count < 0) { | |
583 | fprintf(stderr, | |
584 | "Error writing gap: %s\n", | |
585 | strerror(errno)); | |
586 | exit(1); | |
587 | } | |
588 | gap -= count; | |
589 | } | |
590 | } | |
591 | fprintf(stderr, "writing %d bytes...\n", | |
592 | ph[i].p_filesz); | |
593 | copy(outfile, infile, ph[i].p_offset, | |
594 | ph[i].p_filesz); | |
595 | cur_vma = ph[i].p_vaddr + ph[i].p_filesz; | |
596 | } | |
597 | } | |
598 | ||
599 | /* | |
600 | * Write a page of padding for boot PROMS that read entire pages. | |
601 | * Without this, they may attempt to read past the end of the | |
602 | * data section, incur an error, and refuse to boot. | |
603 | */ | |
604 | { | |
605 | char obuf[4096]; | |
606 | memset(obuf, 0, sizeof obuf); | |
607 | if (write(outfile, obuf, sizeof(obuf)) != sizeof(obuf)) { | |
608 | fprintf(stderr, "Error writing PROM padding: %s\n", | |
609 | strerror(errno)); | |
610 | exit(1); | |
611 | } | |
612 | } | |
613 | ||
614 | /* Looks like we won... */ | |
615 | exit(0); | |
616 | } |