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 withough 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 * $FreeBSD$
30 */
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/mman.h>
35 #include <sys/imgact.h>
36 #include <sys/kernel.h>
37 #include <sys/fcntl.h>
38 #include <sys/malloc.h>
39 #include <sys/mount.h>
40 #include <sys/namei.h>
41 #include <sys/vnode.h>
42
43 #include <vm/vm.h>
44 #include <vm/vm_prot.h>
45 #include <vm/pmap.h>
46 #include <vm/vm_map.h>
47 #include <vm/vm_kern.h>
48 #include <vm/vm_extern.h>
49 #include <vm/vm_zone.h>
50
51 #include <i386/ibcs2/coff.h>
52 #include <i386/ibcs2/ibcs2_util.h>
53
54 extern struct sysentvec ibcs2_svr3_sysvec;
55
56 static int coff_load_file __P((struct proc *p, char *name));
57 static int exec_coff_imgact __P((struct image_params *imgp));
58
59 static int load_coff_section __P((struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot));
60
61 static int
62 load_coff_section(struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset,
63 caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot)
64 {
65 size_t map_len;
66 vm_offset_t map_offset;
67 vm_offset_t map_addr;
68 int error;
69 unsigned char *data_buf = 0;
70 size_t copy_len;
71
72 map_offset = trunc_page(offset);
73 map_addr = trunc_page((vm_offset_t)vmaddr);
74
75 if (memsz > filsz) {
76 /*
77 * We have the stupid situation that
78 * the section is longer than it is on file,
79 * which means it has zero-filled areas, and
80 * we have to work for it. Stupid iBCS!
81 */
82 map_len = trunc_page(offset + filsz) - trunc_page(map_offset);
83 } else {
84 /*
85 * The only stuff we care about is on disk, and we
86 * don't care if we map in more than is really there.
87 */
88 map_len = round_page(offset + filsz) - trunc_page(map_offset);
89 }
90
91 DPRINTF(("%s(%d): vm_mmap(&vmspace->vm_map, &0x%08lx, 0x%x, 0x%x, "
92 "VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED, vp, 0x%x)\n",
93 __FILE__, __LINE__, map_addr, map_len, prot, map_offset));
94
95 if (error = vm_mmap(&vmspace->vm_map,
96 &map_addr,
97 map_len,
98 prot,
99 VM_PROT_ALL,
100 MAP_PRIVATE | MAP_FIXED,
101 (caddr_t) vp,
102 map_offset))
103 return error;
104
105 if (memsz == filsz) {
106 /* We're done! */
107 return 0;
108 }
109
110 /*
111 * Now we have screwball stuff, to accomodate stupid COFF.
112 * We have to map the remaining bit of the file into the kernel's
113 * memory map, allocate some anonymous memory, copy that last
114 * bit into it, and then we're done. *sigh*
115 * For clean-up reasons, we actally map in the file last.
116 */
117
118 copy_len = (offset + filsz) - trunc_page(offset + filsz);
119 map_addr = trunc_page((vm_offset_t)vmaddr + filsz);
120 map_len = round_page((vm_offset_t)vmaddr + memsz) - map_addr;
121
122 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));
123
124 if (map_len != 0) {
125 error = vm_map_find(&vmspace->vm_map, NULL, 0, &map_addr,
126 map_len, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
127 if (error)
128 return error;
129 }
130
131 if (error = vm_mmap(kernel_map,
132 (vm_offset_t *) &data_buf,
133 PAGE_SIZE,
134 VM_PROT_READ,
135 VM_PROT_READ,
136 0,
137 (caddr_t) vp,
138 trunc_page(offset + filsz)))
139 return error;
140
141 error = copyout(data_buf, (caddr_t) map_addr, copy_len);
142
143 if (vm_map_remove(kernel_map,
144 (vm_offset_t) data_buf,
145 (vm_offset_t) data_buf + PAGE_SIZE))
146 panic("load_coff_section vm_map_remove failed");
147
148 return error;
149 }
150
151 static int
152 coff_load_file(struct proc *p, char *name)
153 {
154 struct vmspace *vmspace = p->p_vmspace;
155 int error;
156 struct nameidata nd;
157 struct vnode *vp;
158 struct vattr attr;
159 struct filehdr *fhdr;
160 struct aouthdr *ahdr;
161 struct scnhdr *scns;
162 char *ptr = 0;
163 int nscns;
164 unsigned long text_offset = 0, text_address = 0, text_size = 0;
165 unsigned long data_offset = 0, data_address = 0, data_size = 0;
166 unsigned long bss_size = 0;
167 int i;
168
169 /* XXX use of 'curproc' should be 'p'?*/
170 NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME, UIO_SYSSPACE, name, curproc);
171
172 error = namei(&nd);
173 if (error)
174 return error;
175
176 vp = nd.ni_vp;
177 if (vp == NULL)
178 return ENOEXEC;
179
180 if (vp->v_writecount) {
181 error = ETXTBSY;
182 goto fail;
183 }
184
185 if (error = VOP_GETATTR(vp, &attr, p->p_ucred, p))
186 goto fail;
187
188 if ((vp->v_mount->mnt_flag & MNT_NOEXEC)
189 || ((attr.va_mode & 0111) == 0)
190 || (attr.va_type != VREG))
191 goto fail;
192
193 if (attr.va_size == 0) {
194 error = ENOEXEC;
195 goto fail;
196 }
197
198 if (error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p))
199 goto fail;
200
201 if (error = VOP_OPEN(vp, FREAD, p->p_ucred, p))
202 goto fail;
203
204 /*
205 * Lose the lock on the vnode. It's no longer needed, and must not
206 * exist for the pagefault paging to work below.
207 */
208 VOP_UNLOCK(vp, 0, p);
209
210 if (error = vm_mmap(kernel_map,
211 (vm_offset_t *) &ptr,
212 PAGE_SIZE,
213 VM_PROT_READ,
214 VM_PROT_READ,
215 0,
216 (caddr_t) vp,
217 0))
218 goto fail;
219
220 fhdr = (struct filehdr *)ptr;
221
222 if (fhdr->f_magic != I386_COFF) {
223 error = ENOEXEC;
224 goto dealloc_and_fail;
225 }
226
227 nscns = fhdr->f_nscns;
228
229 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
230 /*
231 * XXX -- just fail. I'm so lazy.
232 */
233 error = ENOEXEC;
234 goto dealloc_and_fail;
235 }
236
237 ahdr = (struct aouthdr*)(ptr + sizeof(struct filehdr));
238
239 scns = (struct scnhdr*)(ptr + sizeof(struct filehdr)
240 + sizeof(struct aouthdr));
241
242 for (i = 0; i < nscns; i++) {
243 if (scns[i].s_flags & STYP_NOLOAD)
244 continue;
245 else if (scns[i].s_flags & STYP_TEXT) {
246 text_address = scns[i].s_vaddr;
247 text_size = scns[i].s_size;
248 text_offset = scns[i].s_scnptr;
249 }
250 else if (scns[i].s_flags & STYP_DATA) {
251 data_address = scns[i].s_vaddr;
252 data_size = scns[i].s_size;
253 data_offset = scns[i].s_scnptr;
254 } else if (scns[i].s_flags & STYP_BSS) {
255 bss_size = scns[i].s_size;
256 }
257 }
258
259 if (error = load_coff_section(vmspace, vp, text_offset,
260 (caddr_t)(void *)(uintptr_t)text_address,
261 text_size, text_size,
262 VM_PROT_READ | VM_PROT_EXECUTE)) {
263 goto dealloc_and_fail;
264 }
265 if (error = load_coff_section(vmspace, vp, data_offset,
266 (caddr_t)(void *)(uintptr_t)data_address,
267 data_size + bss_size, data_size,
268 VM_PROT_ALL)) {
269 goto dealloc_and_fail;
270 }
271
272 error = 0;
273
274 dealloc_and_fail:
275 if (vm_map_remove(kernel_map,
276 (vm_offset_t) ptr,
277 (vm_offset_t) ptr + PAGE_SIZE))
278 panic(__FUNCTION__ " vm_map_remove failed");
279
280 fail:
281 vput(nd.ni_vp);
282 zfree(namei_zone, nd.ni_cnd.cn_pnbuf);
283 return error;
284 }
285
286 static int
287 exec_coff_imgact(imgp)
288 struct image_params *imgp;
289 {
290 const struct filehdr *fhdr = (const struct filehdr*)imgp->image_header;
291 const struct aouthdr *ahdr;
292 const struct scnhdr *scns;
293 int i;
294 struct vmspace *vmspace;
295 int nscns;
296 int error;
297 unsigned long text_offset = 0, text_address = 0, text_size = 0;
298 unsigned long data_offset = 0, data_address = 0, data_size = 0;
299 unsigned long bss_size = 0;
300 caddr_t hole;
301
302 if (fhdr->f_magic != I386_COFF ||
303 !(fhdr->f_flags & F_EXEC)) {
304
305 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
306 return -1;
307 }
308
309 nscns = fhdr->f_nscns;
310 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
311 /*
312 * For now, return an error -- need to be able to
313 * read in all of the section structures.
314 */
315
316 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
317 return -1;
318 }
319
320 ahdr = (const struct aouthdr*)
321 ((const char*)(imgp->image_header) + sizeof(struct filehdr));
322 imgp->entry_addr = ahdr->entry;
323
324 scns = (const struct scnhdr*)
325 ((const char*)(imgp->image_header) + sizeof(struct filehdr) +
326 sizeof(struct aouthdr));
327
328 if (error = exec_extract_strings(imgp)) {
329 DPRINTF(("%s(%d): return %d\n", __FILE__, __LINE__, error));
330 return error;
331 }
332
333 exec_new_vmspace(imgp);
334 vmspace = imgp->proc->p_vmspace;
335
336 for (i = 0; i < nscns; i++) {
337
338 DPRINTF(("i = %d, scns[i].s_name = %s, scns[i].s_vaddr = %08lx, "
339 "scns[i].s_scnptr = %d\n", i, scns[i].s_name,
340 scns[i].s_vaddr, scns[i].s_scnptr));
341 if (scns[i].s_flags & STYP_NOLOAD) {
342 /*
343 * A section that is not loaded, for whatever
344 * reason. It takes precedance over other flag
345 * bits...
346 */
347 continue;
348 } else if (scns[i].s_flags & STYP_TEXT) {
349 text_address = scns[i].s_vaddr;
350 text_size = scns[i].s_size;
351 text_offset = scns[i].s_scnptr;
352 } else if (scns[i].s_flags & STYP_DATA) {
353 /* .data section */
354 data_address = scns[i].s_vaddr;
355 data_size = scns[i].s_size;
356 data_offset = scns[i].s_scnptr;
357 } else if (scns[i].s_flags & STYP_BSS) {
358 /* .bss section */
359 bss_size = scns[i].s_size;
360 } else if (scns[i].s_flags & STYP_LIB) {
361 char *buf = 0;
362 int foff = trunc_page(scns[i].s_scnptr);
363 int off = scns[i].s_scnptr - foff;
364 int len = round_page(scns[i].s_size + PAGE_SIZE);
365 int j;
366
367 if (error = vm_mmap(kernel_map,
368 (vm_offset_t *) &buf,
369 len,
370 VM_PROT_READ,
371 VM_PROT_READ,
372 0,
373 (caddr_t) imgp->vp,
374 foff)) {
375 return ENOEXEC;
376 }
377 if(scns[i].s_size) {
378 char *libbuf;
379 int emul_path_len = strlen(ibcs2_emul_path);
380
381 libbuf = malloc(MAXPATHLEN + emul_path_len,
382 M_TEMP, M_WAITOK);
383 strcpy(libbuf, ibcs2_emul_path);
384
385 for (j = off; j < scns[i].s_size + off; j++) {
386 char *libname;
387
388 libname = buf + j + 4 * *(long*)(buf + j + 4);
389 j += 4* *(long*)(buf + j);
390
391 DPRINTF(("%s(%d): shared library %s\n",
392 __FILE__, __LINE__, libname));
393 strcpy(&libbuf[emul_path_len], libname);
394 error = coff_load_file(imgp->proc, libbuf);
395 if (error)
396 error = coff_load_file(imgp->proc,
397 libname);
398 if (error)
399 break;
400 }
401 free(libbuf, M_TEMP);
402 }
403 if (vm_map_remove(kernel_map,
404 (vm_offset_t) buf,
405 (vm_offset_t) buf + len))
406 panic("exec_coff_imgact vm_map_remove failed");
407 if (error)
408 return error;
409 }
410 }
411 /*
412 * Map in .text now
413 */
414
415 DPRINTF(("%s(%d): load_coff_section(vmspace, "
416 "imgp->vp, %08lx, %08lx, 0x%x, 0x%x, 0x%x)\n",
417 __FILE__, __LINE__, text_offset, text_address,
418 text_size, text_size, VM_PROT_READ | VM_PROT_EXECUTE));
419 if (error = load_coff_section(vmspace, imgp->vp,
420 text_offset,
421 (caddr_t)(void *)(uintptr_t)text_address,
422 text_size, text_size,
423 VM_PROT_READ | VM_PROT_EXECUTE)) {
424 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
425 return error;
426 }
427 /*
428 * Map in .data and .bss now
429 */
430
431
432 DPRINTF(("%s(%d): load_coff_section(vmspace, "
433 "imgp->vp, 0x%08lx, 0x%08lx, 0x%x, 0x%x, 0x%x)\n",
434 __FILE__, __LINE__, data_offset, data_address,
435 data_size + bss_size, data_size, VM_PROT_ALL));
436 if (error = load_coff_section(vmspace, imgp->vp,
437 data_offset,
438 (caddr_t)(void *)(uintptr_t)data_address,
439 data_size + bss_size, data_size,
440 VM_PROT_ALL)) {
441
442 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
443 return error;
444 }
445
446 imgp->interpreted = 0;
447 imgp->proc->p_sysent = &ibcs2_svr3_sysvec;
448
449 vmspace->vm_tsize = round_page(text_size) >> PAGE_SHIFT;
450 vmspace->vm_dsize = round_page(data_size + bss_size) >> PAGE_SHIFT;
451 vmspace->vm_taddr = (caddr_t)(void *)(uintptr_t)text_address;
452 vmspace->vm_daddr = (caddr_t)(void *)(uintptr_t)data_address;
453
454 hole = (caddr_t)trunc_page((vm_offset_t)vmspace->vm_daddr) + ctob(vmspace->vm_dsize);
455
456
457 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, PAGE_SIZE, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n",
458 __FILE__, __LINE__, hole));
459 DPRINTF(("imgact: error = %d\n", error));
460
461 error = vm_map_find(&vmspace->vm_map, NULL, 0,
462 (vm_offset_t *) &hole, PAGE_SIZE, FALSE,
463 VM_PROT_ALL, VM_PROT_ALL, 0);
464
465 DPRINTF(("IBCS2: start vm_dsize = 0x%x, vm_daddr = 0x%x end = 0x%x\n",
466 ctob(vmspace->vm_dsize), vmspace->vm_daddr,
467 ctob(vmspace->vm_dsize) + vmspace->vm_daddr ));
468 DPRINTF(("%s(%d): returning successfully!\n", __FILE__, __LINE__));
469
470 /* Indicate that this file should not be modified */
471 imgp->vp->v_flag |= VTEXT;
472 return 0;
473 }
474
475 /*
476 * Tell kern_execve.c about it, with a little help from the linker.
477 * Since `const' objects end up in the text segment, TEXT_SET is the
478 * correct directive to use.
479 */
480 static const struct execsw coff_execsw = { exec_coff_imgact, "coff" };
481 EXEC_SET(coff, coff_execsw);
Cache object: 0862993f0e16e72aa66da9566442e02f
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