1 /*-
2 * Copyright (c) 1994 Sean Eric Fagan
3 * Copyright (c) 1994 Søren Schmidt
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/5.3/sys/i386/ibcs2/imgact_coff.c 122882 2003-11-18 14:21:34Z tjr $");
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/fcntl.h>
36 #include <sys/imgact.h>
37 #include <sys/kernel.h>
38 #include <sys/lock.h>
39 #include <sys/malloc.h>
40 #include <sys/mman.h>
41 #include <sys/mount.h>
42 #include <sys/namei.h>
43 #include <sys/vnode.h>
44
45 #include <vm/vm.h>
46 #include <vm/pmap.h>
47 #include <vm/vm_map.h>
48 #include <vm/vm_kern.h>
49 #include <vm/vm_extern.h>
50
51 #include <i386/ibcs2/coff.h>
52 #include <i386/ibcs2/ibcs2_util.h>
53
54 MODULE_DEPEND(coff, ibcs2, 1, 1, 1);
55
56 extern struct sysentvec ibcs2_svr3_sysvec;
57
58 static int coff_load_file(struct thread *td, char *name);
59 static int exec_coff_imgact(struct image_params *imgp);
60
61 static int load_coff_section(struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot);
62
63 static int
64 load_coff_section(struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset,
65 caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot)
66 {
67 size_t map_len;
68 vm_offset_t map_offset;
69 vm_offset_t map_addr;
70 int error;
71 unsigned char *data_buf = 0;
72 size_t copy_len;
73
74 map_offset = trunc_page(offset);
75 map_addr = trunc_page((vm_offset_t)vmaddr);
76
77 if (memsz > filsz) {
78 /*
79 * We have the stupid situation that
80 * the section is longer than it is on file,
81 * which means it has zero-filled areas, and
82 * we have to work for it. Stupid iBCS!
83 */
84 map_len = trunc_page(offset + filsz) - trunc_page(map_offset);
85 } else {
86 /*
87 * The only stuff we care about is on disk, and we
88 * don't care if we map in more than is really there.
89 */
90 map_len = round_page(offset + filsz) - trunc_page(map_offset);
91 }
92
93 DPRINTF(("%s(%d): vm_mmap(&vmspace->vm_map, &0x%08lx, 0x%x, 0x%x, "
94 "VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED, vp, 0x%x)\n",
95 __FILE__, __LINE__, map_addr, map_len, prot, map_offset));
96
97 if ((error = vm_mmap(&vmspace->vm_map,
98 &map_addr,
99 map_len,
100 prot,
101 VM_PROT_ALL,
102 MAP_PRIVATE | MAP_FIXED,
103 (caddr_t) vp,
104 map_offset)) != 0)
105 return error;
106
107 if (memsz == filsz) {
108 /* We're done! */
109 return 0;
110 }
111
112 /*
113 * Now we have screwball stuff, to accomodate stupid COFF.
114 * We have to map the remaining bit of the file into the kernel's
115 * memory map, allocate some anonymous memory, copy that last
116 * bit into it, and then we're done. *sigh*
117 * For clean-up reasons, we actally map in the file last.
118 */
119
120 copy_len = (offset + filsz) - trunc_page(offset + filsz);
121 map_addr = trunc_page((vm_offset_t)vmaddr + filsz);
122 map_len = round_page((vm_offset_t)vmaddr + memsz) - map_addr;
123
124 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx,0x%x, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n", __FILE__, __LINE__, map_addr, map_len));
125
126 if (map_len != 0) {
127 error = vm_map_find(&vmspace->vm_map, NULL, 0, &map_addr,
128 map_len, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
129 if (error)
130 return error;
131 }
132
133 if ((error = vm_mmap(kernel_map,
134 (vm_offset_t *) &data_buf,
135 PAGE_SIZE,
136 VM_PROT_READ,
137 VM_PROT_READ,
138 0,
139 (caddr_t) vp,
140 trunc_page(offset + filsz))) != 0)
141 return error;
142
143 error = copyout(data_buf, (caddr_t) map_addr, copy_len);
144
145 if (vm_map_remove(kernel_map,
146 (vm_offset_t) data_buf,
147 (vm_offset_t) data_buf + PAGE_SIZE))
148 panic("load_coff_section vm_map_remove failed");
149
150 return error;
151 }
152
153 static int
154 coff_load_file(struct thread *td, char *name)
155 {
156 struct proc *p = td->td_proc;
157 struct vmspace *vmspace = p->p_vmspace;
158 int error;
159 struct nameidata nd;
160 struct vnode *vp;
161 struct vattr attr;
162 struct filehdr *fhdr;
163 struct aouthdr *ahdr;
164 struct scnhdr *scns;
165 char *ptr = 0;
166 int nscns;
167 unsigned long text_offset = 0, text_address = 0, text_size = 0;
168 unsigned long data_offset = 0, data_address = 0, data_size = 0;
169 unsigned long bss_size = 0;
170 int i;
171
172 NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME, UIO_SYSSPACE, name, td);
173
174 error = namei(&nd);
175 if (error)
176 return error;
177
178 vp = nd.ni_vp;
179 if (vp == NULL)
180 return ENOEXEC;
181
182 if (vp->v_writecount) {
183 error = ETXTBSY;
184 goto fail;
185 }
186
187 if ((error = VOP_GETATTR(vp, &attr, td->td_ucred, td)) != 0)
188 goto fail;
189
190 if ((vp->v_mount->mnt_flag & MNT_NOEXEC)
191 || ((attr.va_mode & 0111) == 0)
192 || (attr.va_type != VREG))
193 goto fail;
194
195 if (attr.va_size == 0) {
196 error = ENOEXEC;
197 goto fail;
198 }
199
200 if ((error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td)) != 0)
201 goto fail;
202
203 if ((error = VOP_OPEN(vp, FREAD, td->td_ucred, td, -1)) != 0)
204 goto fail;
205
206 /*
207 * Lose the lock on the vnode. It's no longer needed, and must not
208 * exist for the pagefault paging to work below.
209 */
210 VOP_UNLOCK(vp, 0, td);
211
212 if ((error = vm_mmap(kernel_map,
213 (vm_offset_t *) &ptr,
214 PAGE_SIZE,
215 VM_PROT_READ,
216 VM_PROT_READ,
217 0,
218 (caddr_t) vp,
219 0)) != 0)
220 goto unlocked_fail;
221
222 fhdr = (struct filehdr *)ptr;
223
224 if (fhdr->f_magic != I386_COFF) {
225 error = ENOEXEC;
226 goto dealloc_and_fail;
227 }
228
229 nscns = fhdr->f_nscns;
230
231 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
232 /*
233 * XXX -- just fail. I'm so lazy.
234 */
235 error = ENOEXEC;
236 goto dealloc_and_fail;
237 }
238
239 ahdr = (struct aouthdr*)(ptr + sizeof(struct filehdr));
240
241 scns = (struct scnhdr*)(ptr + sizeof(struct filehdr)
242 + sizeof(struct aouthdr));
243
244 for (i = 0; i < nscns; i++) {
245 if (scns[i].s_flags & STYP_NOLOAD)
246 continue;
247 else if (scns[i].s_flags & STYP_TEXT) {
248 text_address = scns[i].s_vaddr;
249 text_size = scns[i].s_size;
250 text_offset = scns[i].s_scnptr;
251 }
252 else if (scns[i].s_flags & STYP_DATA) {
253 data_address = scns[i].s_vaddr;
254 data_size = scns[i].s_size;
255 data_offset = scns[i].s_scnptr;
256 } else if (scns[i].s_flags & STYP_BSS) {
257 bss_size = scns[i].s_size;
258 }
259 }
260
261 if ((error = load_coff_section(vmspace, vp, text_offset,
262 (caddr_t)(void *)(uintptr_t)text_address,
263 text_size, text_size,
264 VM_PROT_READ | VM_PROT_EXECUTE)) != 0) {
265 goto dealloc_and_fail;
266 }
267 if ((error = load_coff_section(vmspace, vp, data_offset,
268 (caddr_t)(void *)(uintptr_t)data_address,
269 data_size + bss_size, data_size,
270 VM_PROT_ALL)) != 0) {
271 goto dealloc_and_fail;
272 }
273
274 error = 0;
275
276 dealloc_and_fail:
277 if (vm_map_remove(kernel_map,
278 (vm_offset_t) ptr,
279 (vm_offset_t) ptr + PAGE_SIZE))
280 panic("%s vm_map_remove failed", __func__);
281
282 fail:
283 VOP_UNLOCK(vp, 0, td);
284 unlocked_fail:
285 NDFREE(&nd, NDF_ONLY_PNBUF);
286 vrele(nd.ni_vp);
287 return error;
288 }
289
290 static int
291 exec_coff_imgact(imgp)
292 struct image_params *imgp;
293 {
294 const struct filehdr *fhdr = (const struct filehdr*)imgp->image_header;
295 const struct aouthdr *ahdr;
296 const struct scnhdr *scns;
297 int i;
298 struct vmspace *vmspace;
299 int nscns;
300 int error;
301 unsigned long text_offset = 0, text_address = 0, text_size = 0;
302 unsigned long data_offset = 0, data_address = 0, data_size = 0;
303 unsigned long bss_size = 0;
304 caddr_t hole;
305 struct thread *td = curthread;
306
307 if (fhdr->f_magic != I386_COFF ||
308 !(fhdr->f_flags & F_EXEC)) {
309
310 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
311 return -1;
312 }
313
314 nscns = fhdr->f_nscns;
315 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
316 /*
317 * For now, return an error -- need to be able to
318 * read in all of the section structures.
319 */
320
321 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
322 return -1;
323 }
324
325 ahdr = (const struct aouthdr*)
326 ((const char*)(imgp->image_header) + sizeof(struct filehdr));
327 imgp->entry_addr = ahdr->entry;
328
329 scns = (const struct scnhdr*)
330 ((const char*)(imgp->image_header) + sizeof(struct filehdr) +
331 sizeof(struct aouthdr));
332
333 VOP_UNLOCK(imgp->vp, 0, td);
334
335 if ((error = exec_extract_strings(imgp)) != 0) {
336 DPRINTF(("%s(%d): return %d\n", __FILE__, __LINE__, error));
337 goto fail;
338 }
339
340 exec_new_vmspace(imgp, &ibcs2_svr3_sysvec);
341 vmspace = imgp->proc->p_vmspace;
342
343 for (i = 0; i < nscns; i++) {
344
345 DPRINTF(("i = %d, scns[i].s_name = %s, scns[i].s_vaddr = %08lx, "
346 "scns[i].s_scnptr = %d\n", i, scns[i].s_name,
347 scns[i].s_vaddr, scns[i].s_scnptr));
348 if (scns[i].s_flags & STYP_NOLOAD) {
349 /*
350 * A section that is not loaded, for whatever
351 * reason. It takes precedance over other flag
352 * bits...
353 */
354 continue;
355 } else if (scns[i].s_flags & STYP_TEXT) {
356 text_address = scns[i].s_vaddr;
357 text_size = scns[i].s_size;
358 text_offset = scns[i].s_scnptr;
359 } else if (scns[i].s_flags & STYP_DATA) {
360 /* .data section */
361 data_address = scns[i].s_vaddr;
362 data_size = scns[i].s_size;
363 data_offset = scns[i].s_scnptr;
364 } else if (scns[i].s_flags & STYP_BSS) {
365 /* .bss section */
366 bss_size = scns[i].s_size;
367 } else if (scns[i].s_flags & STYP_LIB) {
368 char *buf = 0;
369 int foff = trunc_page(scns[i].s_scnptr);
370 int off = scns[i].s_scnptr - foff;
371 int len = round_page(scns[i].s_size + PAGE_SIZE);
372 int j;
373
374 if ((error = vm_mmap(kernel_map,
375 (vm_offset_t *) &buf,
376 len,
377 VM_PROT_READ,
378 VM_PROT_READ,
379 0,
380 (caddr_t) imgp->vp,
381 foff)) != 0) {
382 error = ENOEXEC;
383 goto fail;
384 }
385 if(scns[i].s_size) {
386 char *libbuf;
387 int emul_path_len = strlen(ibcs2_emul_path);
388
389 libbuf = malloc(MAXPATHLEN + emul_path_len,
390 M_TEMP, M_WAITOK);
391 strcpy(libbuf, ibcs2_emul_path);
392
393 for (j = off; j < scns[i].s_size + off;) {
394 long stroff, nextoff;
395 char *libname;
396
397 nextoff = 4 * *(long *)(buf + j);
398 stroff = 4 * *(long *)(buf + j + sizeof(long));
399
400 libname = buf + j + stroff;
401 j += nextoff;
402
403 DPRINTF(("%s(%d): shared library %s\n",
404 __FILE__, __LINE__, libname));
405 strlcpy(&libbuf[emul_path_len], libname, MAXPATHLEN);
406 /* XXXKSE only 1:1 in coff */ error = coff_load_file(
407 FIRST_THREAD_IN_PROC(imgp->proc), libbuf);
408 if (error)
409 error = coff_load_file(
410 FIRST_THREAD_IN_PROC(imgp->proc),
411 libname);
412 if (error)
413 break;
414 }
415 free(libbuf, M_TEMP);
416 }
417 if (vm_map_remove(kernel_map,
418 (vm_offset_t) buf,
419 (vm_offset_t) buf + len))
420 panic("exec_coff_imgact vm_map_remove failed");
421 if (error)
422 goto fail;
423 }
424 }
425 /*
426 * Map in .text now
427 */
428
429 DPRINTF(("%s(%d): load_coff_section(vmspace, "
430 "imgp->vp, %08lx, %08lx, 0x%x, 0x%x, 0x%x)\n",
431 __FILE__, __LINE__, text_offset, text_address,
432 text_size, text_size, VM_PROT_READ | VM_PROT_EXECUTE));
433 if ((error = load_coff_section(vmspace, imgp->vp,
434 text_offset,
435 (caddr_t)(void *)(uintptr_t)text_address,
436 text_size, text_size,
437 VM_PROT_READ | VM_PROT_EXECUTE)) != 0) {
438 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
439 goto fail;
440 }
441 /*
442 * Map in .data and .bss now
443 */
444
445
446 DPRINTF(("%s(%d): load_coff_section(vmspace, "
447 "imgp->vp, 0x%08lx, 0x%08lx, 0x%x, 0x%x, 0x%x)\n",
448 __FILE__, __LINE__, data_offset, data_address,
449 data_size + bss_size, data_size, VM_PROT_ALL));
450 if ((error = load_coff_section(vmspace, imgp->vp,
451 data_offset,
452 (caddr_t)(void *)(uintptr_t)data_address,
453 data_size + bss_size, data_size,
454 VM_PROT_ALL)) != 0) {
455
456 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
457 goto fail;
458 }
459
460 imgp->interpreted = 0;
461 imgp->proc->p_sysent = &ibcs2_svr3_sysvec;
462
463 vmspace->vm_tsize = round_page(text_size) >> PAGE_SHIFT;
464 vmspace->vm_dsize = round_page(data_size + bss_size) >> PAGE_SHIFT;
465 vmspace->vm_taddr = (caddr_t)(void *)(uintptr_t)text_address;
466 vmspace->vm_daddr = (caddr_t)(void *)(uintptr_t)data_address;
467
468 hole = (caddr_t)trunc_page((vm_offset_t)vmspace->vm_daddr) + ctob(vmspace->vm_dsize);
469
470
471 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, PAGE_SIZE, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n",
472 __FILE__, __LINE__, hole));
473 DPRINTF(("imgact: error = %d\n", error));
474
475 error = vm_map_find(&vmspace->vm_map, NULL, 0,
476 (vm_offset_t *) &hole, PAGE_SIZE, FALSE,
477 VM_PROT_ALL, VM_PROT_ALL, 0);
478
479 DPRINTF(("IBCS2: start vm_dsize = 0x%x, vm_daddr = 0x%x end = 0x%x\n",
480 ctob(vmspace->vm_dsize), vmspace->vm_daddr,
481 ctob(vmspace->vm_dsize) + vmspace->vm_daddr ));
482 DPRINTF(("%s(%d): returning successfully!\n", __FILE__, __LINE__));
483
484 fail:
485 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY, td);
486
487 return error;
488 }
489
490 /*
491 * Tell kern_execve.c about it, with a little help from the linker.
492 */
493 static struct execsw coff_execsw = { exec_coff_imgact, "coff" };
494 EXEC_SET(coff, coff_execsw);
Cache object: f54660616f7032e1a6c0be9cba3005ec
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