Commit | Line | Data |
---|---|---|
984263bc | 1 | /*- |
08d72226 | 2 | * Copyright (c) 1995-1996 Søren Schmidt |
984263bc MD |
3 | * Copyright (c) 1996 Peter Wemm |
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: src/sys/kern/imgact_elf.c,v 1.73.2.13 2002/12/28 19:49:41 dillon Exp $ | |
d913b2fa | 30 | * $DragonFly: src/sys/kern/imgact_elf.c,v 1.55 2008/08/17 17:21:36 nth Exp $ |
984263bc MD |
31 | */ |
32 | ||
33 | #include <sys/param.h> | |
34 | #include <sys/exec.h> | |
35 | #include <sys/fcntl.h> | |
731100e5 | 36 | #include <sys/file.h> |
984263bc MD |
37 | #include <sys/imgact.h> |
38 | #include <sys/imgact_elf.h> | |
39 | #include <sys/kernel.h> | |
40 | #include <sys/malloc.h> | |
41 | #include <sys/mman.h> | |
dadab5e9 MD |
42 | #include <sys/systm.h> |
43 | #include <sys/proc.h> | |
fad57d0e | 44 | #include <sys/nlookup.h> |
984263bc | 45 | #include <sys/pioctl.h> |
984263bc MD |
46 | #include <sys/procfs.h> |
47 | #include <sys/resourcevar.h> | |
48 | #include <sys/signalvar.h> | |
49 | #include <sys/stat.h> | |
50 | #include <sys/syscall.h> | |
51 | #include <sys/sysctl.h> | |
52 | #include <sys/sysent.h> | |
984263bc | 53 | #include <sys/vnode.h> |
8ba5f7ef | 54 | #include <sys/eventhandler.h> |
984263bc | 55 | |
5c5185ae SG |
56 | #include <cpu/lwbuf.h> |
57 | ||
984263bc MD |
58 | #include <vm/vm.h> |
59 | #include <vm/vm_kern.h> | |
60 | #include <vm/vm_param.h> | |
61 | #include <vm/pmap.h> | |
62 | #include <sys/lock.h> | |
63 | #include <vm/vm_map.h> | |
64 | #include <vm/vm_object.h> | |
65 | #include <vm/vm_extern.h> | |
66 | ||
67 | #include <machine/elf.h> | |
68 | #include <machine/md_var.h> | |
731100e5 MD |
69 | #include <sys/mount.h> |
70 | #include <sys/ckpt.h> | |
984263bc MD |
71 | #define OLD_EI_BRAND 8 |
72 | ||
73 | __ElfType(Brandinfo); | |
74 | __ElfType(Auxargs); | |
75 | ||
402ed7e1 RG |
76 | static int elf_check_header (const Elf_Ehdr *hdr); |
77 | static int elf_freebsd_fixup (register_t **stack_base, | |
78 | struct image_params *imgp); | |
79 | static int elf_load_file (struct proc *p, const char *file, u_long *addr, | |
80 | u_long *entry); | |
81 | static int elf_load_section (struct proc *p, | |
984263bc MD |
82 | struct vmspace *vmspace, struct vnode *vp, |
83 | vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, | |
402ed7e1 RG |
84 | vm_prot_t prot); |
85 | static int exec_elf_imgact (struct image_params *imgp); | |
984263bc MD |
86 | |
87 | static int elf_trace = 0; | |
88 | SYSCTL_INT(_debug, OID_AUTO, elf_trace, CTLFLAG_RW, &elf_trace, 0, ""); | |
89 | static int elf_legacy_coredump = 0; | |
90 | SYSCTL_INT(_debug, OID_AUTO, elf_legacy_coredump, CTLFLAG_RW, | |
91 | &elf_legacy_coredump, 0, ""); | |
92 | ||
8d0415e1 JS |
93 | static int dragonfly_match_abi_note(const Elf_Note *); |
94 | static int freebsd_match_abi_note(const Elf_Note *); | |
95 | ||
984263bc MD |
96 | static struct sysentvec elf_freebsd_sysvec = { |
97 | SYS_MAXSYSCALL, | |
98 | sysent, | |
8ec60c3f | 99 | -1, |
984263bc MD |
100 | 0, |
101 | 0, | |
102 | 0, | |
103 | 0, | |
104 | 0, | |
105 | elf_freebsd_fixup, | |
106 | sendsig, | |
107 | sigcode, | |
108 | &szsigcode, | |
109 | 0, | |
110 | "FreeBSD ELF", | |
111 | elf_coredump, | |
112 | NULL, | |
113 | MINSIGSTKSZ | |
114 | }; | |
115 | ||
116 | static Elf_Brandinfo freebsd_brand_info = { | |
117 | ELFOSABI_FREEBSD, | |
118 | "FreeBSD", | |
8d0415e1 | 119 | freebsd_match_abi_note, |
984263bc MD |
120 | "", |
121 | "/usr/libexec/ld-elf.so.1", | |
122 | &elf_freebsd_sysvec | |
123 | }; | |
8d0415e1 JS |
124 | |
125 | static Elf_Brandinfo dragonfly_brand_info = { | |
126 | ELFOSABI_NONE, | |
127 | "DragonFly", | |
128 | dragonfly_match_abi_note, | |
129 | "", | |
130 | "/usr/libexec/ld-elf.so.2", | |
131 | &elf_freebsd_sysvec | |
132 | }; | |
133 | ||
984263bc | 134 | static Elf_Brandinfo *elf_brand_list[MAX_BRANDS] = { |
8d0415e1 | 135 | &dragonfly_brand_info, |
984263bc MD |
136 | &freebsd_brand_info, |
137 | NULL, NULL, NULL, | |
8d0415e1 | 138 | NULL, NULL, NULL |
984263bc MD |
139 | }; |
140 | ||
8d0415e1 JS |
141 | static int |
142 | freebsd_match_abi_note(const Elf_Note *abi_note) | |
143 | { | |
144 | const char *abi_name = (const char *) | |
145 | ((const uint8_t *)abi_note + sizeof(*abi_note)); | |
146 | ||
147 | if (abi_note->n_namesz != sizeof("FreeBSD")) | |
148 | return(FALSE); | |
149 | if (memcmp(abi_name, "FreeBSD", sizeof("FreeBSD"))) | |
150 | return(FALSE); | |
151 | return(TRUE); | |
152 | } | |
153 | ||
154 | static int | |
155 | dragonfly_match_abi_note(const Elf_Note *abi_note) | |
156 | { | |
157 | const char *abi_name = (const char *) | |
158 | ((const uint8_t *)abi_note + sizeof(*abi_note)); | |
159 | ||
160 | if (abi_note->n_namesz != sizeof("DragonFly")) | |
161 | return(FALSE); | |
162 | if (memcmp(abi_name, "DragonFly", sizeof("DragonFly"))) | |
163 | return(FALSE); | |
164 | return(TRUE); | |
165 | } | |
166 | ||
984263bc MD |
167 | int |
168 | elf_insert_brand_entry(Elf_Brandinfo *entry) | |
169 | { | |
170 | int i; | |
171 | ||
172 | for (i=1; i<MAX_BRANDS; i++) { | |
173 | if (elf_brand_list[i] == NULL) { | |
174 | elf_brand_list[i] = entry; | |
175 | break; | |
176 | } | |
177 | } | |
178 | if (i == MAX_BRANDS) | |
179 | return -1; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | int | |
184 | elf_remove_brand_entry(Elf_Brandinfo *entry) | |
185 | { | |
186 | int i; | |
187 | ||
188 | for (i=1; i<MAX_BRANDS; i++) { | |
189 | if (elf_brand_list[i] == entry) { | |
190 | elf_brand_list[i] = NULL; | |
191 | break; | |
192 | } | |
193 | } | |
194 | if (i == MAX_BRANDS) | |
195 | return -1; | |
196 | return 0; | |
197 | } | |
198 | ||
0e5797fe MD |
199 | /* |
200 | * Check if an elf brand is being used anywhere in the system. | |
201 | * | |
7bd34050 | 202 | * Used by the linux emulation module unloader. This isn't safe from |
0e5797fe MD |
203 | * races. |
204 | */ | |
205 | struct elf_brand_inuse_info { | |
206 | int rval; | |
207 | Elf_Brandinfo *entry; | |
208 | }; | |
209 | ||
210 | static int elf_brand_inuse_callback(struct proc *p, void *data); | |
211 | ||
984263bc MD |
212 | int |
213 | elf_brand_inuse(Elf_Brandinfo *entry) | |
214 | { | |
0e5797fe | 215 | struct elf_brand_inuse_info info; |
984263bc | 216 | |
0e5797fe MD |
217 | info.rval = FALSE; |
218 | info.entry = entry; | |
219 | allproc_scan(elf_brand_inuse_callback, entry); | |
220 | return (info.rval); | |
221 | } | |
222 | ||
223 | static | |
224 | int | |
225 | elf_brand_inuse_callback(struct proc *p, void *data) | |
226 | { | |
227 | struct elf_brand_inuse_info *info = data; | |
984263bc | 228 | |
0e5797fe MD |
229 | if (p->p_sysent == info->entry->sysvec) { |
230 | info->rval = TRUE; | |
231 | return(-1); | |
232 | } | |
233 | return(0); | |
984263bc MD |
234 | } |
235 | ||
236 | static int | |
237 | elf_check_header(const Elf_Ehdr *hdr) | |
238 | { | |
239 | if (!IS_ELF(*hdr) || | |
240 | hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || | |
241 | hdr->e_ident[EI_DATA] != ELF_TARG_DATA || | |
2cc7c579 DR |
242 | hdr->e_ident[EI_VERSION] != EV_CURRENT || |
243 | hdr->e_phentsize != sizeof(Elf_Phdr) || | |
244 | hdr->e_ehsize != sizeof(Elf_Ehdr) || | |
245 | hdr->e_version != ELF_TARG_VER) | |
984263bc MD |
246 | return ENOEXEC; |
247 | ||
248 | if (!ELF_MACHINE_OK(hdr->e_machine)) | |
249 | return ENOEXEC; | |
250 | ||
984263bc MD |
251 | return 0; |
252 | } | |
253 | ||
7c34d798 SS |
254 | static Elf_Brandinfo * |
255 | elf_check_abi_note(struct image_params *imgp, const Elf_Phdr *ph) | |
256 | { | |
257 | Elf_Brandinfo *match = NULL; | |
258 | const Elf_Note *tmp_note; | |
5c5185ae | 259 | struct lwbuf *lwb; |
7c34d798 SS |
260 | const char *page; |
261 | char *data = NULL; | |
262 | Elf_Off off; | |
263 | size_t firstoff; | |
264 | size_t len; | |
265 | size_t firstlen; | |
266 | ||
267 | len = ph->p_filesz; | |
268 | off = ph->p_offset; | |
269 | ||
270 | firstoff = off & PAGE_MASK; | |
271 | firstlen = PAGE_SIZE - firstoff; | |
272 | ||
273 | if (len < sizeof(Elf_Note) || len > PAGE_SIZE) | |
274 | return NULL; /* ENOEXEC? */ | |
275 | ||
5c5185ae | 276 | if (exec_map_page(imgp, off >> PAGE_SHIFT, &lwb, &page)) |
7c34d798 SS |
277 | return NULL; |
278 | ||
279 | /* | |
280 | * Crosses page boundary? Is that allowed? | |
281 | */ | |
282 | if (firstlen < len) { | |
283 | data = kmalloc(len, M_TEMP, M_WAITOK); | |
284 | ||
285 | bcopy(page + firstoff, data, firstlen); | |
286 | ||
5c5185ae SG |
287 | exec_unmap_page(lwb); |
288 | if (exec_map_page(imgp, (off >> PAGE_SHIFT) + 1, &lwb, &page)) { | |
7c34d798 SS |
289 | kfree(data, M_TEMP); |
290 | return NULL; | |
291 | } | |
43297079 | 292 | bcopy(page, data + firstlen, len - firstlen); |
7c34d798 SS |
293 | tmp_note = (void *)data; |
294 | } else { | |
295 | tmp_note = (const void *)(page + firstoff); | |
296 | } | |
297 | ||
298 | while (len >= sizeof(Elf_Note)) { | |
299 | int i; | |
300 | size_t nlen = roundup(tmp_note->n_namesz, sizeof(Elf_Word)) + | |
301 | roundup(tmp_note->n_descsz, sizeof(Elf_Word)) + | |
302 | sizeof(Elf_Note); | |
303 | ||
304 | if (nlen > len) | |
305 | break; | |
306 | ||
307 | if (tmp_note->n_type != 1) | |
308 | goto next; | |
309 | ||
310 | for (i = 0; i < MAX_BRANDS; i++) { | |
311 | Elf_Brandinfo *bi = elf_brand_list[i]; | |
312 | ||
313 | if (bi != NULL && bi->match_abi_note != NULL && | |
314 | bi->match_abi_note(tmp_note)) { | |
315 | match = bi; | |
316 | break; | |
317 | } | |
318 | } | |
319 | ||
320 | if (match != NULL) | |
321 | break; | |
322 | ||
323 | next: | |
324 | len -= nlen; | |
325 | tmp_note += nlen; | |
326 | } | |
327 | ||
328 | if (data != NULL) | |
329 | kfree(data, M_TEMP); | |
5c5185ae | 330 | exec_unmap_page(lwb); |
7c34d798 SS |
331 | |
332 | return (match); | |
333 | } | |
334 | ||
984263bc | 335 | static int |
731100e5 | 336 | elf_load_section(struct proc *p, struct vmspace *vmspace, struct vnode *vp, |
57f7b636 MD |
337 | vm_offset_t offset, caddr_t vmaddr, size_t memsz, |
338 | size_t filsz, vm_prot_t prot) | |
984263bc MD |
339 | { |
340 | size_t map_len; | |
341 | vm_offset_t map_addr; | |
342 | int error, rv, cow; | |
a108bf71 | 343 | int count; |
984263bc MD |
344 | size_t copy_len; |
345 | vm_object_t object; | |
346 | vm_offset_t file_addr; | |
984263bc | 347 | |
7540ab49 | 348 | object = vp->v_object; |
984263bc MD |
349 | error = 0; |
350 | ||
351 | /* | |
352 | * It's necessary to fail if the filsz + offset taken from the | |
353 | * header is greater than the actual file pager object's size. | |
354 | * If we were to allow this, then the vm_map_find() below would | |
355 | * walk right off the end of the file object and into the ether. | |
356 | * | |
357 | * While I'm here, might as well check for something else that | |
358 | * is invalid: filsz cannot be greater than memsz. | |
359 | */ | |
57f7b636 | 360 | if ((off_t)filsz + offset > vp->v_filesize || filsz > memsz) { |
984263bc MD |
361 | uprintf("elf_load_section: truncated ELF file\n"); |
362 | return (ENOEXEC); | |
363 | } | |
364 | ||
365 | map_addr = trunc_page((vm_offset_t)vmaddr); | |
366 | file_addr = trunc_page(offset); | |
367 | ||
368 | /* | |
369 | * We have two choices. We can either clear the data in the last page | |
370 | * of an oversized mapping, or we can start the anon mapping a page | |
371 | * early and copy the initialized data into that first page. We | |
372 | * choose the second.. | |
373 | */ | |
374 | if (memsz > filsz) | |
375 | map_len = trunc_page(offset+filsz) - file_addr; | |
376 | else | |
377 | map_len = round_page(offset+filsz) - file_addr; | |
378 | ||
379 | if (map_len != 0) { | |
380 | vm_object_reference(object); | |
381 | ||
382 | /* cow flags: don't dump readonly sections in core */ | |
383 | cow = MAP_COPY_ON_WRITE | MAP_PREFAULT | | |
384 | (prot & VM_PROT_WRITE ? 0 : MAP_DISABLE_COREDUMP); | |
385 | ||
a108bf71 | 386 | count = vm_map_entry_reserve(MAP_RESERVE_COUNT); |
984263bc | 387 | vm_map_lock(&vmspace->vm_map); |
a108bf71 | 388 | rv = vm_map_insert(&vmspace->vm_map, &count, |
984263bc MD |
389 | object, |
390 | file_addr, /* file offset */ | |
391 | map_addr, /* virtual start */ | |
392 | map_addr + map_len,/* virtual end */ | |
1b874851 MD |
393 | VM_MAPTYPE_NORMAL, |
394 | prot, VM_PROT_ALL, | |
984263bc MD |
395 | cow); |
396 | vm_map_unlock(&vmspace->vm_map); | |
a108bf71 | 397 | vm_map_entry_release(count); |
984263bc MD |
398 | if (rv != KERN_SUCCESS) { |
399 | vm_object_deallocate(object); | |
400 | return EINVAL; | |
401 | } | |
402 | ||
403 | /* we can stop now if we've covered it all */ | |
404 | if (memsz == filsz) { | |
405 | return 0; | |
406 | } | |
407 | } | |
408 | ||
409 | ||
410 | /* | |
411 | * We have to get the remaining bit of the file into the first part | |
412 | * of the oversized map segment. This is normally because the .data | |
413 | * segment in the file is extended to provide bss. It's a neat idea | |
414 | * to try and save a page, but it's a pain in the behind to implement. | |
415 | */ | |
416 | copy_len = (offset + filsz) - trunc_page(offset + filsz); | |
417 | map_addr = trunc_page((vm_offset_t)vmaddr + filsz); | |
418 | map_len = round_page((vm_offset_t)vmaddr + memsz) - map_addr; | |
419 | ||
420 | /* This had damn well better be true! */ | |
421 | if (map_len != 0) { | |
a108bf71 | 422 | count = vm_map_entry_reserve(MAP_RESERVE_COUNT); |
984263bc | 423 | vm_map_lock(&vmspace->vm_map); |
a108bf71 MD |
424 | rv = vm_map_insert(&vmspace->vm_map, &count, |
425 | NULL, 0, | |
984263bc | 426 | map_addr, map_addr + map_len, |
1b874851 MD |
427 | VM_MAPTYPE_NORMAL, |
428 | VM_PROT_ALL, VM_PROT_ALL, | |
429 | 0); | |
984263bc | 430 | vm_map_unlock(&vmspace->vm_map); |
a108bf71 | 431 | vm_map_entry_release(count); |
984263bc MD |
432 | if (rv != KERN_SUCCESS) { |
433 | return EINVAL; | |
434 | } | |
435 | } | |
436 | ||
437 | if (copy_len != 0) { | |
18b3f457 | 438 | vm_page_t m; |
5c5185ae | 439 | struct lwbuf *lwb; |
18b3f457 MD |
440 | |
441 | m = vm_fault_object_page(object, trunc_page(offset + filsz), | |
442 | VM_PROT_READ, 0, &error); | |
443 | if (m) { | |
5c5185ae SG |
444 | lwb = lwbuf_alloc(m); |
445 | error = copyout((caddr_t)lwbuf_kva(lwb), | |
18b3f457 | 446 | (caddr_t)map_addr, copy_len); |
5c5185ae | 447 | lwbuf_free(lwb); |
18b3f457 | 448 | vm_page_unhold(m); |
984263bc | 449 | } |
984263bc MD |
450 | if (error) { |
451 | return (error); | |
452 | } | |
453 | } | |
454 | ||
455 | /* | |
456 | * set it to the specified protection | |
457 | */ | |
458 | vm_map_protect(&vmspace->vm_map, map_addr, map_addr + map_len, prot, | |
459 | FALSE); | |
460 | ||
461 | return error; | |
462 | } | |
463 | ||
464 | /* | |
465 | * Load the file "file" into memory. It may be either a shared object | |
466 | * or an executable. | |
467 | * | |
468 | * The "addr" reference parameter is in/out. On entry, it specifies | |
469 | * the address where a shared object should be loaded. If the file is | |
470 | * an executable, this value is ignored. On exit, "addr" specifies | |
471 | * where the file was actually loaded. | |
472 | * | |
473 | * The "entry" reference parameter is out only. On exit, it specifies | |
474 | * the entry point for the loaded file. | |
475 | */ | |
476 | static int | |
477 | elf_load_file(struct proc *p, const char *file, u_long *addr, u_long *entry) | |
478 | { | |
479 | struct { | |
fad57d0e | 480 | struct nlookupdata nd; |
984263bc MD |
481 | struct vattr attr; |
482 | struct image_params image_params; | |
483 | } *tempdata; | |
484 | const Elf_Ehdr *hdr = NULL; | |
485 | const Elf_Phdr *phdr = NULL; | |
fad57d0e | 486 | struct nlookupdata *nd; |
984263bc MD |
487 | struct vmspace *vmspace = p->p_vmspace; |
488 | struct vattr *attr; | |
489 | struct image_params *imgp; | |
490 | vm_prot_t prot; | |
491 | u_long rbase; | |
492 | u_long base_addr = 0; | |
493 | int error, i, numsegs; | |
494 | ||
efda3bd0 | 495 | tempdata = kmalloc(sizeof(*tempdata), M_TEMP, M_WAITOK); |
984263bc MD |
496 | nd = &tempdata->nd; |
497 | attr = &tempdata->attr; | |
498 | imgp = &tempdata->image_params; | |
499 | ||
500 | /* | |
501 | * Initialize part of the common data | |
502 | */ | |
503 | imgp->proc = p; | |
984263bc MD |
504 | imgp->attr = attr; |
505 | imgp->firstpage = NULL; | |
18f40545 | 506 | imgp->image_header = NULL; |
fad57d0e | 507 | imgp->vp = NULL; |
984263bc | 508 | |
fad57d0e MD |
509 | error = nlookup_init(nd, file, UIO_SYSSPACE, NLC_FOLLOW); |
510 | if (error == 0) | |
511 | error = nlookup(nd); | |
512 | if (error == 0) | |
28623bf9 | 513 | error = cache_vget(&nd->nl_nch, nd->nl_cred, LK_EXCLUSIVE, &imgp->vp); |
fad57d0e MD |
514 | nlookup_done(nd); |
515 | if (error) | |
984263bc | 516 | goto fail; |
984263bc MD |
517 | |
518 | /* | |
519 | * Check permissions, modes, uid, etc on the file, and "open" it. | |
520 | */ | |
521 | error = exec_check_permissions(imgp); | |
522 | if (error) { | |
a11aaa81 | 523 | vn_unlock(imgp->vp); |
984263bc MD |
524 | goto fail; |
525 | } | |
526 | ||
527 | error = exec_map_first_page(imgp); | |
528 | /* | |
529 | * Also make certain that the interpreter stays the same, so set | |
530 | * its VTEXT flag, too. | |
531 | */ | |
532 | if (error == 0) | |
2247fe02 | 533 | vsetflags(imgp->vp, VTEXT); |
a11aaa81 | 534 | vn_unlock(imgp->vp); |
984263bc MD |
535 | if (error) |
536 | goto fail; | |
537 | ||
538 | hdr = (const Elf_Ehdr *)imgp->image_header; | |
539 | if ((error = elf_check_header(hdr)) != 0) | |
540 | goto fail; | |
541 | if (hdr->e_type == ET_DYN) | |
542 | rbase = *addr; | |
543 | else if (hdr->e_type == ET_EXEC) | |
544 | rbase = 0; | |
545 | else { | |
546 | error = ENOEXEC; | |
547 | goto fail; | |
548 | } | |
549 | ||
2cc7c579 DR |
550 | /* Only support headers that fit within first page for now |
551 | * (multiplication of two Elf_Half fields will not overflow) */ | |
984263bc | 552 | if ((hdr->e_phoff > PAGE_SIZE) || |
2cc7c579 | 553 | (hdr->e_phentsize * hdr->e_phnum) > PAGE_SIZE - hdr->e_phoff) { |
984263bc MD |
554 | error = ENOEXEC; |
555 | goto fail; | |
556 | } | |
557 | ||
558 | phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff); | |
559 | ||
560 | for (i = 0, numsegs = 0; i < hdr->e_phnum; i++) { | |
561 | if (phdr[i].p_type == PT_LOAD) { /* Loadable segment */ | |
562 | prot = 0; | |
563 | if (phdr[i].p_flags & PF_X) | |
564 | prot |= VM_PROT_EXECUTE; | |
565 | if (phdr[i].p_flags & PF_W) | |
566 | prot |= VM_PROT_WRITE; | |
567 | if (phdr[i].p_flags & PF_R) | |
568 | prot |= VM_PROT_READ; | |
569 | ||
dadab5e9 | 570 | error = elf_load_section( |
fad57d0e | 571 | p, vmspace, imgp->vp, |
dadab5e9 MD |
572 | phdr[i].p_offset, |
573 | (caddr_t)phdr[i].p_vaddr + | |
574 | rbase, | |
575 | phdr[i].p_memsz, | |
576 | phdr[i].p_filesz, prot); | |
577 | if (error != 0) | |
984263bc MD |
578 | goto fail; |
579 | /* | |
580 | * Establish the base address if this is the | |
581 | * first segment. | |
582 | */ | |
583 | if (numsegs == 0) | |
584 | base_addr = trunc_page(phdr[i].p_vaddr + rbase); | |
585 | numsegs++; | |
586 | } | |
587 | } | |
588 | *addr = base_addr; | |
589 | *entry=(unsigned long)hdr->e_entry + rbase; | |
590 | ||
591 | fail: | |
592 | if (imgp->firstpage) | |
593 | exec_unmap_first_page(imgp); | |
fad57d0e MD |
594 | if (imgp->vp) { |
595 | vrele(imgp->vp); | |
596 | imgp->vp = NULL; | |
597 | } | |
efda3bd0 | 598 | kfree(tempdata, M_TEMP); |
984263bc MD |
599 | |
600 | return error; | |
601 | } | |
602 | ||
603 | /* | |
604 | * non static, as it can be overridden by start_init() | |
605 | */ | |
606 | int fallback_elf_brand = -1; | |
607 | SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, | |
608 | &fallback_elf_brand, -1, | |
609 | "ELF brand of last resort"); | |
610 | ||
08d72226 AH |
611 | static int can_exec_dyn = 1; |
612 | SYSCTL_INT(_kern, OID_AUTO, elf_exec_dyn, CTLFLAG_RW, | |
613 | &can_exec_dyn, 1, | |
614 | "ELF: can exec shared libraries"); | |
615 | ||
984263bc MD |
616 | static int |
617 | exec_elf_imgact(struct image_params *imgp) | |
618 | { | |
619 | const Elf_Ehdr *hdr = (const Elf_Ehdr *) imgp->image_header; | |
620 | const Elf_Phdr *phdr; | |
621 | Elf_Auxargs *elf_auxargs = NULL; | |
622 | struct vmspace *vmspace; | |
623 | vm_prot_t prot; | |
624 | u_long text_size = 0, data_size = 0, total_size = 0; | |
625 | u_long text_addr = 0, data_addr = 0; | |
626 | u_long seg_size, seg_addr; | |
627 | u_long addr, entry = 0, proghdr = 0; | |
628 | int error, i; | |
629 | const char *interp = NULL; | |
8d0415e1 | 630 | const Elf_Note *abi_note = NULL; |
7c34d798 | 631 | Elf_Brandinfo *brand_info = NULL; |
984263bc MD |
632 | char *path; |
633 | ||
2bd9d75c DRJ |
634 | error = 0; |
635 | ||
984263bc MD |
636 | /* |
637 | * Do we have a valid ELF header ? | |
08d72226 | 638 | * We allow execution of ET_EXEC and, if kern.elf_exec_dyn is 1, ET_DYN. |
984263bc | 639 | */ |
08d72226 AH |
640 | if (elf_check_header(hdr) != 0 || |
641 | (hdr->e_type != ET_EXEC && (!can_exec_dyn || hdr->e_type != ET_DYN))) | |
984263bc MD |
642 | return -1; |
643 | ||
644 | /* | |
645 | * From here on down, we return an errno, not -1, as we've | |
646 | * detected an ELF file. | |
647 | */ | |
648 | ||
649 | if ((hdr->e_phoff > PAGE_SIZE) || | |
650 | (hdr->e_phoff + hdr->e_phentsize * hdr->e_phnum) > PAGE_SIZE) { | |
651 | /* Only support headers in first page for now */ | |
652 | return ENOEXEC; | |
653 | } | |
654 | phdr = (const Elf_Phdr*)(imgp->image_header + hdr->e_phoff); | |
655 | ||
656 | /* | |
657 | * From this point on, we may have resources that need to be freed. | |
658 | */ | |
659 | ||
29802dbb | 660 | exec_new_vmspace(imgp, NULL); |
984263bc MD |
661 | |
662 | /* | |
663 | * Yeah, I'm paranoid. There is every reason in the world to get | |
664 | * VTEXT now since from here on out, there are places we can have | |
665 | * a context switch. Better safe than sorry; I really don't want | |
666 | * the file to change while it's being loaded. | |
667 | */ | |
5fd012e0 | 668 | vsetflags(imgp->vp, VTEXT); |
984263bc MD |
669 | |
670 | vmspace = imgp->proc->p_vmspace; | |
671 | ||
672 | for (i = 0; i < hdr->e_phnum; i++) { | |
673 | switch(phdr[i].p_type) { | |
674 | ||
675 | case PT_LOAD: /* Loadable segment */ | |
676 | prot = 0; | |
677 | if (phdr[i].p_flags & PF_X) | |
678 | prot |= VM_PROT_EXECUTE; | |
679 | if (phdr[i].p_flags & PF_W) | |
680 | prot |= VM_PROT_WRITE; | |
681 | if (phdr[i].p_flags & PF_R) | |
682 | prot |= VM_PROT_READ; | |
683 | ||
684 | if ((error = elf_load_section(imgp->proc, | |
685 | vmspace, imgp->vp, | |
686 | phdr[i].p_offset, | |
687 | (caddr_t)phdr[i].p_vaddr, | |
688 | phdr[i].p_memsz, | |
689 | phdr[i].p_filesz, prot)) != 0) | |
690 | goto fail; | |
691 | ||
22cc9971 DX |
692 | /* |
693 | * If this segment contains the program headers, | |
694 | * remember their virtual address for the AT_PHDR | |
695 | * aux entry. Static binaries don't usually include | |
696 | * a PT_PHDR entry. | |
697 | */ | |
698 | if (phdr[i].p_offset == 0 && | |
699 | hdr->e_phoff + hdr->e_phnum * hdr->e_phentsize | |
700 | <= phdr[i].p_filesz) | |
701 | proghdr = phdr[i].p_vaddr + hdr->e_phoff; | |
702 | ||
984263bc MD |
703 | seg_addr = trunc_page(phdr[i].p_vaddr); |
704 | seg_size = round_page(phdr[i].p_memsz + | |
705 | phdr[i].p_vaddr - seg_addr); | |
706 | ||
707 | /* | |
708 | * Is this .text or .data? We can't use | |
709 | * VM_PROT_WRITE or VM_PROT_EXEC, it breaks the | |
710 | * alpha terribly and possibly does other bad | |
711 | * things so we stick to the old way of figuring | |
712 | * it out: If the segment contains the program | |
713 | * entry point, it's a text segment, otherwise it | |
714 | * is a data segment. | |
715 | * | |
716 | * Note that obreak() assumes that data_addr + | |
717 | * data_size == end of data load area, and the ELF | |
718 | * file format expects segments to be sorted by | |
719 | * address. If multiple data segments exist, the | |
720 | * last one will be used. | |
721 | */ | |
722 | if (hdr->e_entry >= phdr[i].p_vaddr && | |
723 | hdr->e_entry < (phdr[i].p_vaddr + | |
724 | phdr[i].p_memsz)) { | |
725 | text_size = seg_size; | |
726 | text_addr = seg_addr; | |
727 | entry = (u_long)hdr->e_entry; | |
728 | } else { | |
729 | data_size = seg_size; | |
730 | data_addr = seg_addr; | |
731 | } | |
732 | total_size += seg_size; | |
733 | ||
734 | /* | |
735 | * Check limits. It should be safe to check the | |
736 | * limits after loading the segment since we do | |
737 | * not actually fault in all the segment's pages. | |
738 | */ | |
739 | if (data_size > | |
740 | imgp->proc->p_rlimit[RLIMIT_DATA].rlim_cur || | |
741 | text_size > maxtsiz || | |
742 | total_size > | |
743 | imgp->proc->p_rlimit[RLIMIT_VMEM].rlim_cur) { | |
744 | error = ENOMEM; | |
745 | goto fail; | |
746 | } | |
747 | break; | |
748 | case PT_INTERP: /* Path to interpreter */ | |
749 | if (phdr[i].p_filesz > MAXPATHLEN || | |
750 | phdr[i].p_offset + phdr[i].p_filesz > PAGE_SIZE) { | |
751 | error = ENOEXEC; | |
752 | goto fail; | |
753 | } | |
754 | interp = imgp->image_header + phdr[i].p_offset; | |
755 | break; | |
8d0415e1 | 756 | case PT_NOTE: /* Check for .note.ABI-tag */ |
7c34d798 SS |
757 | if (brand_info == NULL) |
758 | brand_info = elf_check_abi_note(imgp, &phdr[i]); | |
8d0415e1 | 759 | break; |
984263bc MD |
760 | case PT_PHDR: /* Program header table info */ |
761 | proghdr = phdr[i].p_vaddr; | |
762 | break; | |
763 | default: | |
764 | break; | |
765 | } | |
766 | } | |
767 | ||
768 | vmspace->vm_tsize = text_size >> PAGE_SHIFT; | |
769 | vmspace->vm_taddr = (caddr_t)(uintptr_t)text_addr; | |
770 | vmspace->vm_dsize = data_size >> PAGE_SHIFT; | |
771 | vmspace->vm_daddr = (caddr_t)(uintptr_t)data_addr; | |
772 | ||
773 | addr = ELF_RTLD_ADDR(vmspace); | |
774 | ||
775 | imgp->entry_addr = entry; | |
776 | ||
984263bc MD |
777 | /* We support three types of branding -- (1) the ELF EI_OSABI field |
778 | * that SCO added to the ELF spec, (2) FreeBSD 3.x's traditional string | |
779 | * branding w/in the ELF header, and (3) path of the `interp_path' | |
780 | * field. We should also look for an ".note.ABI-tag" ELF section now | |
781 | * in all Linux ELF binaries, FreeBSD 4.1+, and some NetBSD ones. | |
782 | */ | |
783 | ||
784 | /* If the executable has a brand, search for it in the brand list. */ | |
8d0415e1 | 785 | if (brand_info == NULL && hdr->e_ident[EI_OSABI] != ELFOSABI_NONE) { |
984263bc MD |
786 | for (i = 0; i < MAX_BRANDS; i++) { |
787 | Elf_Brandinfo *bi = elf_brand_list[i]; | |
788 | ||
789 | if (bi != NULL && | |
790 | (hdr->e_ident[EI_OSABI] == bi->brand | |
791 | || 0 == | |
792 | strncmp((const char *)&hdr->e_ident[OLD_EI_BRAND], | |
793 | bi->compat_3_brand, strlen(bi->compat_3_brand)))) { | |
794 | brand_info = bi; | |
795 | break; | |
796 | } | |
797 | } | |
798 | } | |
799 | ||
8d0415e1 JS |
800 | /* Search for a recognized ABI. */ |
801 | if (brand_info == NULL && abi_note != NULL) { | |
237770a0 JS |
802 | } |
803 | ||
804 | /* | |
805 | * ELFOSABI_NONE == ELFOSABI_SYSV, so a SYSV binary misses all | |
806 | * checks so far, since it is neither branded nor does it have | |
807 | * an ABI note. If the EI_OSABI field is ELFOSABI_NONE, assume | |
808 | * it is svr4 and look for an entry in the elf_brand_list with | |
809 | * match_abi_note == NULL. | |
810 | */ | |
811 | if (brand_info == NULL && hdr->e_ident[EI_OSABI] == ELFOSABI_NONE) { | |
812 | for (i = 0; i < MAX_BRANDS; i++) { | |
813 | Elf_Brandinfo *bi = elf_brand_list[i]; | |
814 | ||
815 | if (bi != NULL && bi->match_abi_note == NULL && | |
816 | ELFOSABI_SYSV == bi->brand) { | |
817 | brand_info = bi; | |
8d0415e1 JS |
818 | break; |
819 | } | |
820 | } | |
821 | } | |
822 | ||
823 | /* Lacking a recognized ABI, search for a recognized interpreter. */ | |
984263bc MD |
824 | if (brand_info == NULL && interp != NULL) { |
825 | for (i = 0; i < MAX_BRANDS; i++) { | |
826 | Elf_Brandinfo *bi = elf_brand_list[i]; | |
827 | ||
828 | if (bi != NULL && | |
829 | strcmp(interp, bi->interp_path) == 0) { | |
830 | brand_info = bi; | |
831 | break; | |
832 | } | |
833 | } | |
834 | } | |
835 | ||
836 | /* Lacking a recognized interpreter, try the default brand */ | |
837 | if (brand_info == NULL) { | |
838 | for (i = 0; i < MAX_BRANDS; i++) { | |
839 | Elf_Brandinfo *bi = elf_brand_list[i]; | |
840 | ||
841 | if (bi != NULL && fallback_elf_brand == bi->brand) { | |
842 | brand_info = bi; | |
843 | break; | |
844 | } | |
845 | } | |
846 | } | |
847 | ||
848 | if (brand_info == NULL) { | |
849 | uprintf("ELF binary type \"%u\" not known.\n", | |
850 | hdr->e_ident[EI_OSABI]); | |
851 | error = ENOEXEC; | |
852 | goto fail; | |
7c03f43a | 853 | } |
984263bc MD |
854 | |
855 | imgp->proc->p_sysent = brand_info->sysvec; | |
8ba5f7ef AH |
856 | EVENTHANDLER_INVOKE(process_exec, imgp); |
857 | ||
984263bc | 858 | if (interp != NULL) { |
efda3bd0 | 859 | path = kmalloc(MAXPATHLEN, M_TEMP, M_WAITOK); |
f8c7a42d | 860 | ksnprintf(path, MAXPATHLEN, "%s%s", |
984263bc MD |
861 | brand_info->emul_path, interp); |
862 | if ((error = elf_load_file(imgp->proc, path, &addr, | |
863 | &imgp->entry_addr)) != 0) { | |
864 | if ((error = elf_load_file(imgp->proc, interp, &addr, | |
865 | &imgp->entry_addr)) != 0) { | |
866 | uprintf("ELF interpreter %s not found\n", path); | |
efda3bd0 | 867 | kfree(path, M_TEMP); |
984263bc MD |
868 | goto fail; |
869 | } | |
870 | } | |
efda3bd0 | 871 | kfree(path, M_TEMP); |
5347affc MD |
872 | } else { |
873 | addr = 0; | |
984263bc MD |
874 | } |
875 | ||
876 | /* | |
877 | * Construct auxargs table (used by the fixup routine) | |
878 | */ | |
efda3bd0 | 879 | elf_auxargs = kmalloc(sizeof(Elf_Auxargs), M_TEMP, M_WAITOK); |
984263bc MD |
880 | elf_auxargs->execfd = -1; |
881 | elf_auxargs->phdr = proghdr; | |
882 | elf_auxargs->phent = hdr->e_phentsize; | |
883 | elf_auxargs->phnum = hdr->e_phnum; | |
884 | elf_auxargs->pagesz = PAGE_SIZE; | |
885 | elf_auxargs->base = addr; | |
886 | elf_auxargs->flags = 0; | |
887 | elf_auxargs->entry = entry; | |
888 | elf_auxargs->trace = elf_trace; | |
889 | ||
890 | imgp->auxargs = elf_auxargs; | |
891 | imgp->interpreted = 0; | |
892 | ||
893 | fail: | |
894 | return error; | |
895 | } | |
896 | ||
897 | static int | |
898 | elf_freebsd_fixup(register_t **stack_base, struct image_params *imgp) | |
899 | { | |
900 | Elf_Auxargs *args = (Elf_Auxargs *)imgp->auxargs; | |
901 | register_t *pos; | |
902 | ||
2bd9d75c | 903 | pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2); |
984263bc MD |
904 | |
905 | if (args->trace) { | |
906 | AUXARGS_ENTRY(pos, AT_DEBUG, 1); | |
907 | } | |
908 | if (args->execfd != -1) { | |
909 | AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd); | |
910 | } | |
911 | AUXARGS_ENTRY(pos, AT_PHDR, args->phdr); | |
912 | AUXARGS_ENTRY(pos, AT_PHENT, args->phent); | |
913 | AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum); | |
914 | AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz); | |
915 | AUXARGS_ENTRY(pos, AT_FLAGS, args->flags); | |
916 | AUXARGS_ENTRY(pos, AT_ENTRY, args->entry); | |
917 | AUXARGS_ENTRY(pos, AT_BASE, args->base); | |
918 | AUXARGS_ENTRY(pos, AT_NULL, 0); | |
919 | ||
efda3bd0 | 920 | kfree(imgp->auxargs, M_TEMP); |
984263bc MD |
921 | imgp->auxargs = NULL; |
922 | ||
923 | (*stack_base)--; | |
2bd9d75c | 924 | suword(*stack_base, (long) imgp->args->argc); |
984263bc MD |
925 | return 0; |
926 | } | |
927 | ||
928 | /* | |
929 | * Code for generating ELF core dumps. | |
930 | */ | |
931 | ||
55e44363 | 932 | typedef int (*segment_callback) (vm_map_entry_t, void *); |
984263bc MD |
933 | |
934 | /* Closure for cb_put_phdr(). */ | |
935 | struct phdr_closure { | |
55e44363 MD |
936 | Elf_Phdr *phdr; /* Program header to fill in (incremented) */ |
937 | Elf_Phdr *phdr_max; /* Pointer bound for error check */ | |
984263bc MD |
938 | Elf_Off offset; /* Offset of segment in core file */ |
939 | }; | |
940 | ||
941 | /* Closure for cb_size_segment(). */ | |
942 | struct sseg_closure { | |
943 | int count; /* Count of writable segments. */ | |
55e44363 | 944 | size_t vsize; /* Total size of all writable segments. */ |
984263bc MD |
945 | }; |
946 | ||
55e44363 | 947 | /* Closure for cb_put_fp(). */ |
731100e5 MD |
948 | struct fp_closure { |
949 | struct vn_hdr *vnh; | |
55e44363 | 950 | struct vn_hdr *vnh_max; |
731100e5 MD |
951 | int count; |
952 | struct stat *sb; | |
953 | }; | |
954 | ||
55e44363 MD |
955 | typedef struct elf_buf { |
956 | char *buf; | |
957 | size_t off; | |
958 | size_t off_max; | |
959 | } *elf_buf_t; | |
731100e5 | 960 | |
55e44363 | 961 | static void *target_reserve(elf_buf_t target, size_t bytes, int *error); |
731100e5 | 962 | |
55e44363 MD |
963 | static int cb_put_phdr (vm_map_entry_t, void *); |
964 | static int cb_size_segment (vm_map_entry_t, void *); | |
965 | static int cb_fpcount_segment(vm_map_entry_t, void *); | |
966 | static int cb_put_fp(vm_map_entry_t, void *); | |
984263bc | 967 | |
731100e5 | 968 | |
55e44363 | 969 | static int each_segment (struct proc *, segment_callback, void *, int); |
7d20a8ff | 970 | static int elf_corehdr (struct lwp *, int, struct file *, struct ucred *, |
55e44363 | 971 | int, elf_buf_t); |
d913b2fa NT |
972 | enum putmode { WRITE, DRYRUN }; |
973 | static int elf_puthdr (struct lwp *, elf_buf_t, int sig, enum putmode, | |
974 | int, struct file *); | |
975 | static int elf_putallnotes(struct lwp *, elf_buf_t, int, enum putmode); | |
55e44363 | 976 | static int elf_putnote (elf_buf_t, const char *, int, const void *, size_t); |
731100e5 | 977 | |
7d20a8ff | 978 | static int elf_putsigs(struct lwp *, elf_buf_t); |
55e44363 | 979 | static int elf_puttextvp(struct proc *, elf_buf_t); |
ff7a3478 | 980 | static int elf_putfiles(struct proc *, elf_buf_t, struct file *); |
731100e5 | 981 | |
984263bc MD |
982 | extern int osreldate; |
983 | ||
984 | int | |
7d20a8ff | 985 | elf_coredump(struct lwp *lp, int sig, struct vnode *vp, off_t limit) |
984263bc | 986 | { |
731100e5 MD |
987 | struct file *fp; |
988 | int error; | |
989 | ||
990 | if ((error = falloc(NULL, &fp, NULL)) != 0) | |
991 | return (error); | |
7d20a8ff | 992 | fsetcred(fp, lp->lwp_proc->p_ucred); |
731100e5 | 993 | |
fad57d0e MD |
994 | /* |
995 | * XXX fixme. | |
996 | */ | |
fbb4eeab | 997 | fp->f_type = DTYPE_VNODE; |
731100e5 | 998 | fp->f_flag = O_CREAT|O_WRONLY|O_NOFOLLOW; |
fad57d0e | 999 | fp->f_ops = &vnode_fileops; |
fbb4eeab | 1000 | fp->f_data = vp; |
a11aaa81 | 1001 | vn_unlock(vp); |
731100e5 | 1002 | |
7d20a8ff | 1003 | error = generic_elf_coredump(lp, sig, fp, limit); |
731100e5 | 1004 | |
fbb4eeab | 1005 | fp->f_type = 0; |
731100e5 MD |
1006 | fp->f_flag = 0; |
1007 | fp->f_ops = &badfileops; | |
fbb4eeab | 1008 | fp->f_data = NULL; |
9f87144f | 1009 | fdrop(fp); |
731100e5 MD |
1010 | return (error); |
1011 | } | |
1012 | ||
1013 | int | |
7d20a8ff | 1014 | generic_elf_coredump(struct lwp *lp, int sig, struct file *fp, off_t limit) |
731100e5 | 1015 | { |
7d20a8ff | 1016 | struct proc *p = lp->lwp_proc; |
dadab5e9 | 1017 | struct ucred *cred = p->p_ucred; |
984263bc MD |
1018 | int error = 0; |
1019 | struct sseg_closure seginfo; | |
55e44363 | 1020 | struct elf_buf target; |
984263bc | 1021 | |
731100e5 | 1022 | if (!fp) |
6ea70f76 | 1023 | kprintf("can't dump core - null fp\n"); |
55e44363 MD |
1024 | |
1025 | /* | |
1026 | * Size the program segments | |
1027 | */ | |
984263bc | 1028 | seginfo.count = 0; |
55e44363 | 1029 | seginfo.vsize = 0; |
731100e5 | 1030 | each_segment(p, cb_size_segment, &seginfo, 1); |
984263bc MD |
1031 | |
1032 | /* | |
1033 | * Calculate the size of the core file header area by making | |
1034 | * a dry run of generating it. Nothing is written, but the | |
1035 | * size is calculated. | |
1036 | */ | |
55e44363 | 1037 | bzero(&target, sizeof(target)); |
d913b2fa | 1038 | elf_puthdr(lp, &target, sig, DRYRUN, seginfo.count, fp); |
731100e5 | 1039 | |
55e44363 | 1040 | if (target.off + seginfo.vsize >= limit) |
984263bc MD |
1041 | return (EFAULT); |
1042 | ||
1043 | /* | |
1044 | * Allocate memory for building the header, fill it up, | |
1045 | * and write it out. | |
1046 | */ | |
55e44363 MD |
1047 | target.off_max = target.off; |
1048 | target.off = 0; | |
efda3bd0 | 1049 | target.buf = kmalloc(target.off_max, M_TEMP, M_WAITOK|M_ZERO); |
55e44363 | 1050 | |
7d20a8ff | 1051 | error = elf_corehdr(lp, sig, fp, cred, seginfo.count, &target); |
984263bc MD |
1052 | |
1053 | /* Write the contents of all of the writable segments. */ | |
1054 | if (error == 0) { | |
1055 | Elf_Phdr *php; | |
984263bc | 1056 | int i; |
a63bf9b6 | 1057 | ssize_t nbytes; |
984263bc | 1058 | |
55e44363 MD |
1059 | php = (Elf_Phdr *)(target.buf + sizeof(Elf_Ehdr)) + 1; |
1060 | for (i = 0; i < seginfo.count; i++) { | |
be7d8f4f | 1061 | error = fp_write(fp, (caddr_t)php->p_vaddr, |
e7440b28 | 1062 | php->p_filesz, &nbytes, UIO_USERSPACE); |
984263bc MD |
1063 | if (error != 0) |
1064 | break; | |
984263bc MD |
1065 | php++; |
1066 | } | |
1067 | } | |
efda3bd0 | 1068 | kfree(target.buf, M_TEMP); |
984263bc MD |
1069 | |
1070 | return error; | |
1071 | } | |
1072 | ||
1073 | /* | |
731100e5 | 1074 | * A callback for each_segment() to write out the segment's |
984263bc MD |
1075 | * program header entry. |
1076 | */ | |
55e44363 | 1077 | static int |
731100e5 | 1078 | cb_put_phdr(vm_map_entry_t entry, void *closure) |
984263bc | 1079 | { |
55e44363 | 1080 | struct phdr_closure *phc = closure; |
984263bc MD |
1081 | Elf_Phdr *phdr = phc->phdr; |
1082 | ||
55e44363 MD |
1083 | if (phc->phdr == phc->phdr_max) |
1084 | return EINVAL; | |
1085 | ||
984263bc MD |
1086 | phc->offset = round_page(phc->offset); |
1087 | ||
1088 | phdr->p_type = PT_LOAD; | |
1089 | phdr->p_offset = phc->offset; | |
1090 | phdr->p_vaddr = entry->start; | |
1091 | phdr->p_paddr = 0; | |
1092 | phdr->p_filesz = phdr->p_memsz = entry->end - entry->start; | |
1093 | phdr->p_align = PAGE_SIZE; | |
1094 | phdr->p_flags = 0; | |
1095 | if (entry->protection & VM_PROT_READ) | |
1096 | phdr->p_flags |= PF_R; | |
1097 | if (entry->protection & VM_PROT_WRITE) | |
1098 | phdr->p_flags |= PF_W; | |
1099 | if (entry->protection & VM_PROT_EXECUTE) | |
1100 | phdr->p_flags |= PF_X; | |
1101 | ||
1102 | phc->offset += phdr->p_filesz; | |
55e44363 MD |
1103 | ++phc->phdr; |
1104 | return 0; | |
984263bc MD |
1105 | } |
1106 | ||
1107 | /* | |
1108 | * A callback for each_writable_segment() to gather information about | |
1109 | * the number of segments and their total size. | |
1110 | */ | |
55e44363 | 1111 | static int |
731100e5 | 1112 | cb_size_segment(vm_map_entry_t entry, void *closure) |
984263bc | 1113 | { |
55e44363 | 1114 | struct sseg_closure *ssc = closure; |
984263bc | 1115 | |
55e44363 MD |
1116 | ++ssc->count; |
1117 | ssc->vsize += entry->end - entry->start; | |
1118 | return 0; | |
984263bc MD |
1119 | } |
1120 | ||
731100e5 MD |
1121 | /* |
1122 | * A callback for each_segment() to gather information about | |
1123 | * the number of text segments. | |
1124 | */ | |
55e44363 | 1125 | static int |
731100e5 MD |
1126 | cb_fpcount_segment(vm_map_entry_t entry, void *closure) |
1127 | { | |
55e44363 | 1128 | int *count = closure; |
12693083 MD |
1129 | struct vnode *vp; |
1130 | ||
1131 | if (entry->object.vm_object->type == OBJT_VNODE) { | |
1132 | vp = (struct vnode *)entry->object.vm_object->handle; | |
1133 | if ((vp->v_flag & VCKPT) && curproc->p_textvp == vp) | |
1134 | return 0; | |
731100e5 | 1135 | ++*count; |
12693083 | 1136 | } |
55e44363 | 1137 | return 0; |
731100e5 MD |
1138 | } |
1139 | ||
55e44363 | 1140 | static int |
731100e5 MD |
1141 | cb_put_fp(vm_map_entry_t entry, void *closure) |
1142 | { | |
55e44363 | 1143 | struct fp_closure *fpc = closure; |
731100e5 MD |
1144 | struct vn_hdr *vnh = fpc->vnh; |
1145 | Elf_Phdr *phdr = &vnh->vnh_phdr; | |
1146 | struct vnode *vp; | |
1147 | int error; | |
1148 | ||
12693083 MD |
1149 | /* |
1150 | * If an entry represents a vnode then write out a file handle. | |
1151 | * | |
1152 | * If we are checkpointing a checkpoint-restored program we do | |
1153 | * NOT record the filehandle for the old checkpoint vnode (which | |
1154 | * is mapped all over the place). Instead we rely on the fact | |
1155 | * that a checkpoint-restored program does not mmap() the checkpt | |
1156 | * vnode NOCORE, so its contents will be written out to the | |
4f12bfd3 MD |
1157 | * new checkpoint file. This is necessary because the 'old' |
1158 | * checkpoint file is typically destroyed when a new one is created | |
1159 | * and thus cannot be used to restore the new checkpoint. | |
1160 | * | |
1161 | * Theoretically we could create a chain of checkpoint files and | |
1162 | * operate the checkpointing operation kinda like an incremental | |
1163 | * checkpoint, but a checkpoint restore would then likely wind up | |
1164 | * referencing many prior checkpoint files and that is a bit over | |
1165 | * the top for the purpose of the checkpoint API. | |
12693083 | 1166 | */ |
731100e5 | 1167 | if (entry->object.vm_object->type == OBJT_VNODE) { |
12693083 MD |
1168 | vp = (struct vnode *)entry->object.vm_object->handle; |
1169 | if ((vp->v_flag & VCKPT) && curproc->p_textvp == vp) | |
1170 | return 0; | |
55e44363 MD |
1171 | if (vnh == fpc->vnh_max) |
1172 | return EINVAL; | |
55e44363 MD |
1173 | |
1174 | if (vp->v_mount) | |
1175 | vnh->vnh_fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; | |
731100e5 | 1176 | error = VFS_VPTOFH(vp, &vnh->vnh_fh.fh_fid); |
4fe2217f MD |
1177 | if (error) { |
1178 | char *freepath, *fullpath; | |
1179 | ||
1180 | if (vn_fullpath(curproc, vp, &fullpath, &freepath)) { | |
6ea70f76 | 1181 | kprintf("Warning: coredump, error %d: cannot store file handle for vnode %p\n", error, vp); |
4fe2217f | 1182 | } else { |
6ea70f76 | 1183 | kprintf("Warning: coredump, error %d: cannot store file handle for %s\n", error, fullpath); |
efda3bd0 | 1184 | kfree(freepath, M_TEMP); |
4fe2217f MD |
1185 | } |
1186 | error = 0; | |
1187 | } | |
55e44363 | 1188 | |
731100e5 MD |
1189 | phdr->p_type = PT_LOAD; |
1190 | phdr->p_offset = 0; /* not written to core */ | |
1191 | phdr->p_vaddr = entry->start; | |
1192 | phdr->p_paddr = 0; | |
1193 | phdr->p_filesz = phdr->p_memsz = entry->end - entry->start; | |
1194 | phdr->p_align = PAGE_SIZE; | |
1195 | phdr->p_flags = 0; | |
1196 | if (entry->protection & VM_PROT_READ) | |
1197 | phdr->p_flags |= PF_R; | |
1198 | if (entry->protection & VM_PROT_WRITE) | |
1199 | phdr->p_flags |= PF_W; | |
1200 | if (entry->protection & VM_PROT_EXECUTE) | |
1201 | phdr->p_flags |= PF_X; | |
1202 | ++fpc->vnh; | |
1203 | ++fpc->count; | |
1204 | } | |
55e44363 | 1205 | return 0; |
731100e5 MD |
1206 | } |
1207 | ||
984263bc MD |
1208 | /* |
1209 | * For each writable segment in the process's memory map, call the given | |
1210 | * function with a pointer to the map entry and some arbitrary | |
1211 | * caller-supplied data. | |
1212 | */ | |
55e44363 | 1213 | static int |
731100e5 | 1214 | each_segment(struct proc *p, segment_callback func, void *closure, int writable) |
984263bc | 1215 | { |
55e44363 | 1216 | int error = 0; |
984263bc MD |
1217 | vm_map_t map = &p->p_vmspace->vm_map; |
1218 | vm_map_entry_t entry; | |
1219 | ||
55e44363 | 1220 | for (entry = map->header.next; error == 0 && entry != &map->header; |
984263bc MD |
1221 | entry = entry->next) { |
1222 | vm_object_t obj; | |
1223 | ||
1224 | /* | |
1225 | * Don't dump inaccessible mappings, deal with legacy | |
1226 | * coredump mode. | |
1227 | * | |
1228 | * Note that read-only segments related to the elf binary | |
1229 | * are marked MAP_ENTRY_NOCOREDUMP now so we no longer | |
1230 | * need to arbitrarily ignore such segments. | |
1231 | */ | |
1232 | if (elf_legacy_coredump) { | |
731100e5 | 1233 | if (writable && (entry->protection & VM_PROT_RW) != VM_PROT_RW) |
984263bc MD |
1234 | continue; |
1235 | } else { | |
731100e5 | 1236 | if (writable && (entry->protection & VM_PROT_ALL) == 0) |
984263bc MD |
1237 | continue; |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * Dont include memory segment in the coredump if | |
1242 | * MAP_NOCORE is set in mmap(2) or MADV_NOCORE in | |
1b874851 MD |
1243 | * madvise(2). |
1244 | * | |
1245 | * Currently we only dump normal VM object maps. We do | |
1246 | * not dump submaps or virtual page tables. | |
984263bc | 1247 | */ |
1b874851 MD |
1248 | if (writable && (entry->eflags & MAP_ENTRY_NOCOREDUMP)) |
1249 | continue; | |
1250 | if (entry->maptype != VM_MAPTYPE_NORMAL) | |
984263bc | 1251 | continue; |
984263bc MD |
1252 | if ((obj = entry->object.vm_object) == NULL) |
1253 | continue; | |
1254 | ||
1255 | /* Find the deepest backing object. */ | |
1256 | while (obj->backing_object != NULL) | |
1257 | obj = obj->backing_object; | |
1258 | ||
1259 | /* Ignore memory-mapped devices and such things. */ | |
1260 | if (obj->type != OBJT_DEFAULT && | |
1261 | obj->type != OBJT_SWAP && | |
1262 | obj->type != OBJT_VNODE) | |
1263 | continue; | |
1264 | ||
55e44363 | 1265 | error = (*func)(entry, closure); |
984263bc | 1266 | } |
55e44363 MD |
1267 | return error; |
1268 | } | |
1269 | ||
1270 | static | |
1271 | void * | |
1272 | target_reserve(elf_buf_t target, size_t bytes, int *error) | |
1273 | { | |
1274 | void *res = NULL; | |
1275 | ||
1276 | if (target->buf) { | |
1277 | if (target->off + bytes > target->off_max) | |
1278 | *error = EINVAL; | |
1279 | else | |
1280 | res = target->buf + target->off; | |
1281 | } | |
1282 | target->off += bytes; | |
1283 | return (res); | |
984263bc MD |
1284 | } |
1285 | ||
1286 | /* | |
1287 | * Write the core file header to the file, including padding up to | |
1288 | * the page boundary. | |
1289 | */ | |
1290 | static int | |
d913b2fa NT |
1291 | elf_corehdr(struct lwp *lp, int sig, struct file *fp, struct ucred *cred, |
1292 | int numsegs, elf_buf_t target) | |
984263bc | 1293 | { |
55e44363 | 1294 | int error; |
a63bf9b6 | 1295 | ssize_t nbytes; |
7d20a8ff | 1296 | |
ff7a3478 MD |
1297 | /* |
1298 | * Fill in the header. The fp is passed so we can detect and flag | |
1299 | * a checkpoint file pointer within the core file itself, because | |
1300 | * it may not be restored from the same file handle. | |
1301 | */ | |
d913b2fa | 1302 | error = elf_puthdr(lp, target, sig, WRITE, numsegs, fp); |
984263bc MD |
1303 | |
1304 | /* Write it to the core file. */ | |
e7440b28 MD |
1305 | if (error == 0) { |
1306 | error = fp_write(fp, target->buf, target->off, &nbytes, | |
1307 | UIO_SYSSPACE); | |
1308 | } | |
55e44363 | 1309 | return error; |
984263bc MD |
1310 | } |
1311 | ||
55e44363 | 1312 | static int |
d913b2fa NT |
1313 | elf_puthdr(struct lwp *lp, elf_buf_t target, int sig, enum putmode mode, |
1314 | int numsegs, struct file *fp) | |
984263bc | 1315 | { |
7d20a8ff | 1316 | struct proc *p = lp->lwp_proc; |
55e44363 | 1317 | int error = 0; |
984263bc MD |
1318 | size_t phoff; |
1319 | size_t noteoff; | |
1320 | size_t notesz; | |
55e44363 MD |
1321 | Elf_Ehdr *ehdr; |
1322 | Elf_Phdr *phdr; | |
984263bc | 1323 | |
55e44363 MD |
1324 | ehdr = target_reserve(target, sizeof(Elf_Ehdr), &error); |
1325 | ||
1326 | phoff = target->off; | |
1327 | phdr = target_reserve(target, (numsegs + 1) * sizeof(Elf_Phdr), &error); | |
1328 | ||
1329 | noteoff = target->off; | |
d913b2fa NT |
1330 | if (error == 0) |
1331 | elf_putallnotes(lp, target, sig, mode); | |
55e44363 | 1332 | notesz = target->off - noteoff; |
984263bc | 1333 | |
55e44363 MD |
1334 | /* |
1335 | * put extra cruft for dumping process state here | |
1336 | * - we really want it be before all the program | |
1337 | * mappings | |
1338 | * - we just need to update the offset accordingly | |
1339 | * and GDB will be none the wiser. | |
1340 | */ | |
1341 | if (error == 0) | |
1342 | error = elf_puttextvp(p, target); | |
1343 | if (error == 0) | |
7d20a8ff | 1344 | error = elf_putsigs(lp, target); |
55e44363 | 1345 | if (error == 0) |
ff7a3478 | 1346 | error = elf_putfiles(p, target, fp); |
55e44363 MD |
1347 | |
1348 | /* | |
1349 | * Align up to a page boundary for the program segments. The | |
1350 | * actual data will be written to the outptu file, not to elf_buf_t, | |
1351 | * so we do not have to do any further bounds checking. | |
1352 | */ | |
1353 | target->off = round_page(target->off); | |
1354 | if (error == 0 && ehdr != NULL) { | |
984263bc MD |
1355 | /* |
1356 | * Fill in the ELF header. | |
1357 | */ | |
984263bc MD |
1358 | ehdr->e_ident[EI_MAG0] = ELFMAG0; |
1359 | ehdr->e_ident[EI_MAG1] = ELFMAG1; | |
1360 | ehdr->e_ident[EI_MAG2] = ELFMAG2; | |
1361 | ehdr->e_ident[EI_MAG3] = ELFMAG3; | |
1362 | ehdr->e_ident[EI_CLASS] = ELF_CLASS; | |
1363 | ehdr->e_ident[EI_DATA] = ELF_DATA; | |
1364 | ehdr->e_ident[EI_VERSION] = EV_CURRENT; | |
64fce751 | 1365 | ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE; |
984263bc MD |
1366 | ehdr->e_ident[EI_ABIVERSION] = 0; |
1367 | ehdr->e_ident[EI_PAD] = 0; | |
1368 | ehdr->e_type = ET_CORE; | |
1369 | ehdr->e_machine = ELF_ARCH; | |
1370 | ehdr->e_version = EV_CURRENT; | |
1371 | ehdr->e_entry = 0; | |
1372 | ehdr->e_phoff = phoff; | |
1373 | ehdr->e_flags = 0; | |
1374 | ehdr->e_ehsize = sizeof(Elf_Ehdr); | |
1375 | ehdr->e_phentsize = sizeof(Elf_Phdr); | |
1376 | ehdr->e_phnum = numsegs + 1; | |
1377 | ehdr->e_shentsize = sizeof(Elf_Shdr); | |
1378 | ehdr->e_shnum = 0; | |
1379 | ehdr->e_shstrndx = SHN_UNDEF; | |
55e44363 MD |
1380 | } |
1381 | if (error == 0 && phdr != NULL) { | |
984263bc MD |
1382 | /* |
1383 | * Fill in the program header entries. | |
1384 | */ | |
55e44363 | 1385 | struct phdr_closure phc; |
984263bc MD |
1386 | |
1387 | /* The note segement. */ | |
1388 | phdr->p_type = PT_NOTE; | |
1389 | phdr->p_offset = noteoff; | |
1390 | phdr->p_vaddr = 0; | |
1391 | phdr->p_paddr = 0; | |
1392 | phdr->p_filesz = notesz; | |
1393 | phdr->p_memsz = 0; | |
1394 | phdr->p_flags = 0; | |
1395 | phdr->p_align = 0; | |
55e44363 | 1396 | ++phdr; |
984263bc MD |
1397 | |
1398 | /* All the writable segments from the program. */ | |
1399 | phc.phdr = phdr; | |
55e44363 MD |
1400 | phc.phdr_max = phdr + numsegs; |
1401 | phc.offset = target->off; | |
731100e5 | 1402 | each_segment(p, cb_put_phdr, &phc, 1); |
984263bc | 1403 | } |
55e44363 | 1404 | return (error); |
984263bc MD |
1405 | } |
1406 | ||
d913b2fa NT |
1407 | /* |
1408 | * Append core dump notes to target ELF buffer or simply update target size | |
1409 | * if dryrun selected. | |
1410 | */ | |
1411 | static int | |
1412 | elf_putallnotes(struct lwp *corelp, elf_buf_t target, int sig, | |
1413 | enum putmode mode) | |
1414 | { | |
1415 | struct proc *p = corelp->lwp_proc; | |
1416 | int error; | |
1417 | struct { | |
1418 | prstatus_t status; | |
1419 | prfpregset_t fpregs; | |
1420 | prpsinfo_t psinfo; | |
1421 | } *tmpdata; | |
1422 | prstatus_t *status; | |
1423 | prfpregset_t *fpregs; | |
1424 | prpsinfo_t *psinfo; | |
1425 | struct lwp *lp; | |
1426 | ||
1427 | /* | |
1428 | * Allocate temporary storage for notes on heap to avoid stack overflow. | |
1429 | */ | |
1430 | if (mode != DRYRUN) { | |
1431 | tmpdata = kmalloc(sizeof(*tmpdata), M_TEMP, M_ZERO | M_WAITOK); | |
1432 | status = &tmpdata->status; | |
1433 | fpregs = &tmpdata->fpregs; | |
1434 | psinfo = &tmpdata->psinfo; | |
1435 | } else { | |
1436 | tmpdata = NULL; | |
1437 | status = NULL; | |
1438 | fpregs = NULL; | |
1439 | psinfo = NULL; | |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * Append LWP-agnostic note. | |
1444 | */ | |
1445 | if (mode != DRYRUN) { | |
1446 | psinfo->pr_version = PRPSINFO_VERSION; | |
1447 | psinfo->pr_psinfosz = sizeof(prpsinfo_t); | |
1448 | strncpy(psinfo->pr_fname, p->p_comm, | |
1449 | sizeof(psinfo->pr_fname) - 1); | |
1450 | /* | |
1451 | * XXX - We don't fill in the command line arguments | |
1452 | * properly yet. | |
1453 | */ | |
1454 | strncpy(psinfo->pr_psargs, p->p_comm, PRARGSZ); | |
1455 | } | |
1456 | error = | |
64fce751 | 1457 | elf_putnote(target, "CORE", NT_PRPSINFO, psinfo, sizeof *psinfo); |
d913b2fa NT |
1458 | if (error) |
1459 | goto exit; | |
1460 | ||
1461 | /* | |
1462 | * Append first note for LWP that triggered core so that it is | |
1463 | * the selected one when the debugger starts. | |
1464 | */ | |
1465 | if (mode != DRYRUN) { | |
1466 | status->pr_version = PRSTATUS_VERSION; | |
1467 | status->pr_statussz = sizeof(prstatus_t); | |
1468 | status->pr_gregsetsz = sizeof(gregset_t); | |
1469 | status->pr_fpregsetsz = sizeof(fpregset_t); | |
1470 | status->pr_osreldate = osreldate; | |
1471 | status->pr_cursig = sig; | |
1472 | /* | |
1473 | * XXX GDB needs unique pr_pid for each LWP and does not | |
1474 | * not support pr_pid==0 but lwp_tid can be 0, so hack unique | |
1475 | * value. | |
1476 | */ | |
64fce751 | 1477 | status->pr_pid = corelp->lwp_tid; |
d913b2fa NT |
1478 | fill_regs(corelp, &status->pr_reg); |
1479 | fill_fpregs(corelp, fpregs); | |
1480 | } | |
1481 | error = | |
64fce751 | 1482 | elf_putnote(target, "CORE", NT_PRSTATUS, status, sizeof *status); |
d913b2fa NT |
1483 | if (error) |
1484 | goto exit; | |
1485 | error = | |
64fce751 | 1486 | elf_putnote(target, "CORE", NT_FPREGSET, fpregs, sizeof *fpregs); |
d913b2fa NT |
1487 | if (error) |
1488 | goto exit; | |
1489 | ||
1490 | /* | |
1491 | * Then append notes for other LWPs. | |
1492 | */ | |
1493 | FOREACH_LWP_IN_PROC(lp, p) { | |
1494 | if (lp == corelp) | |
1495 | continue; | |
1496 | /* skip lwps being created */ | |
1497 | if (lp->lwp_thread == NULL) | |
1498 | continue; | |
1499 | if (mode != DRYRUN) { | |
64fce751 | 1500 | status->pr_pid = lp->lwp_tid; |
d913b2fa NT |
1501 | fill_regs(lp, &status->pr_reg); |
1502 | fill_fpregs(lp, fpregs); | |
1503 | } | |
64fce751 | 1504 | error = elf_putnote(target, "CORE", NT_PRSTATUS, |
d913b2fa NT |
1505 | status, sizeof *status); |
1506 | if (error) | |
1507 | goto exit; | |
64fce751 | 1508 | error = elf_putnote(target, "CORE", NT_FPREGSET, |
d913b2fa NT |
1509 | fpregs, sizeof *fpregs); |
1510 | if (error) | |
1511 | goto exit; | |
1512 | } | |
1513 | ||
1514 | exit: | |
1515 | if (tmpdata != NULL) | |
1516 | kfree(tmpdata, M_TEMP); | |
1517 | return (error); | |
1518 | } | |
1519 | ||
f606e7b4 MD |
1520 | /* |
1521 | * Generate a note sub-structure. | |
1522 | * | |
1523 | * NOTE: 4-byte alignment. | |
1524 | */ | |
55e44363 MD |
1525 | static int |
1526 | elf_putnote(elf_buf_t target, const char *name, int type, | |
1527 | const void *desc, size_t descsz) | |
984263bc | 1528 | { |
55e44363 MD |
1529 | int error = 0; |
1530 | char *dst; | |
984263bc MD |
1531 | Elf_Note note; |
1532 | ||
1533 | note.n_namesz = strlen(name) + 1; | |
1534 | note.n_descsz = descsz; | |
1535 | note.n_type = type; | |
55e44363 | 1536 | dst = target_reserve(target, sizeof(note), &error); |
984263bc | 1537 | if (dst != NULL) |
55e44363 MD |
1538 | bcopy(¬e, dst, sizeof note); |
1539 | dst = target_reserve(target, note.n_namesz, &error); | |
984263bc | 1540 | if (dst != NULL) |
55e44363 | 1541 | bcopy(name, dst, note.n_namesz); |
f606e7b4 | 1542 | target->off = roundup2(target->off, sizeof(Elf_Word)); |
55e44363 | 1543 | dst = target_reserve(target, note.n_descsz, &error); |
984263bc | 1544 | if (dst != NULL) |
55e44363 | 1545 | bcopy(desc, dst, note.n_descsz); |
f606e7b4 | 1546 | target->off = roundup2(target->off, sizeof(Elf_Word)); |
55e44363 | 1547 | return(error); |
984263bc MD |
1548 | } |
1549 | ||
731100e5 | 1550 | |
55e44363 | 1551 | static int |
7d20a8ff | 1552 | elf_putsigs(struct lwp *lp, elf_buf_t target) |
731100e5 | 1553 | { |
7d20a8ff SS |
1554 | /* XXX lwp handle more than one lwp */ |
1555 | struct proc *p = lp->lwp_proc; | |
55e44363 | 1556 | int error = 0; |
731100e5 | 1557 | struct ckpt_siginfo *csi; |
55e44363 MD |
1558 | |
1559 | csi = target_reserve(target, sizeof(struct ckpt_siginfo), &error); | |
1560 | if (csi) { | |
1561 | csi->csi_ckptpisz = sizeof(struct ckpt_siginfo); | |
b1b4e5a6 | 1562 | bcopy(p->p_sigacts, &csi->csi_sigacts, sizeof(*p->p_sigacts)); |
55e44363 | 1563 | bcopy(&p->p_realtimer, &csi->csi_itimerval, sizeof(struct itimerval)); |
7d20a8ff | 1564 | bcopy(&lp->lwp_sigmask, &csi->csi_sigmask, |
08f2f1bb | 1565 | sizeof(sigset_t)); |
55e44363 | 1566 | csi->csi_sigparent = p->p_sigparent; |
731100e5 | 1567 | } |
55e44363 | 1568 | return(error); |
731100e5 MD |
1569 | } |
1570 | ||
55e44363 | 1571 | static int |
ff7a3478 | 1572 | elf_putfiles(struct proc *p, elf_buf_t target, struct file *ckfp) |
731100e5 | 1573 | { |
55e44363 MD |
1574 | int error = 0; |
1575 | int i; | |
be7d8f4f | 1576 | struct ckpt_filehdr *cfh = NULL; |
731100e5 MD |
1577 | struct ckpt_fileinfo *cfi; |
1578 | struct file *fp; | |
1579 | struct vnode *vp; | |
1580 | /* | |
1581 | * the duplicated loop is gross, but it was the only way | |
1582 | * to eliminate uninitialized variable warnings | |
1583 | */ | |
55e44363 MD |
1584 | cfh = target_reserve(target, sizeof(struct ckpt_filehdr), &error); |
1585 | if (cfh) { | |
731100e5 | 1586 | cfh->cfh_nfiles = 0; |
be7d8f4f | 1587 | } |
be7d8f4f MD |
1588 | |
1589 | /* | |
4f12bfd3 | 1590 | * ignore STDIN/STDERR/STDOUT. |
be7d8f4f | 1591 | */ |
55e44363 | 1592 | for (i = 3; error == 0 && i < p->p_fd->fd_nfiles; i++) { |
228b401d MD |
1593 | fp = holdfp(p->p_fd, i, -1); |
1594 | if (fp == NULL) | |
be7d8f4f | 1595 | continue; |
4f12bfd3 MD |
1596 | /* |
1597 | * XXX Only checkpoint vnodes for now. | |
1598 | */ | |
228b401d MD |
1599 | if (fp->f_type != DTYPE_VNODE) { |
1600 | fdrop(fp); | |
be7d8f4f | 1601 | continue; |
228b401d | 1602 | } |
4f12bfd3 MD |
1603 | cfi = target_reserve(target, sizeof(struct ckpt_fileinfo), |
1604 | &error); | |
228b401d MD |
1605 | if (cfi == NULL) { |
1606 | fdrop(fp); | |
4f12bfd3 | 1607 | continue; |
228b401d | 1608 | } |
4f12bfd3 MD |
1609 | cfi->cfi_index = -1; |
1610 | cfi->cfi_type = fp->f_type; | |
1611 | cfi->cfi_flags = fp->f_flag; | |
1612 | cfi->cfi_offset = fp->f_offset; | |
ff7a3478 MD |
1613 | cfi->cfi_ckflags = 0; |
1614 | ||
1615 | if (fp == ckfp) | |
1616 | cfi->cfi_ckflags |= CKFIF_ISCKPTFD; | |
4f12bfd3 MD |
1617 | /* f_count and f_msgcount should not be saved/restored */ |
1618 | /* XXX save cred info */ | |
1619 | ||
1620 | switch(fp->f_type) { | |
1621 | case DTYPE_VNODE: | |
9ce25870 | 1622 | vp = (struct vnode *)fp->f_data; |
55e44363 MD |
1623 | /* |
1624 | * it looks like a bug in ptrace is marking | |
9ce25870 MD |
1625 | * a non-vnode as a vnode - until we find the |
1626 | * root cause this will at least prevent | |
1627 | * further panics from truss | |
1628 | */ | |
55e44363 | 1629 | if (vp == NULL || vp->v_mount == NULL) |
4f12bfd3 | 1630 | break; |
be7d8f4f | 1631 | cfh->cfh_nfiles++; |
be7d8f4f | 1632 | cfi->cfi_index = i; |
be7d8f4f MD |
1633 | cfi->cfi_fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
1634 | error = VFS_VPTOFH(vp, &cfi->cfi_fh.fh_fid); | |
4f12bfd3 MD |
1635 | break; |
1636 | default: | |
1637 | break; | |
731100e5 | 1638 | } |
228b401d | 1639 | fdrop(fp); |
731100e5 | 1640 | } |
55e44363 | 1641 | return(error); |
731100e5 MD |
1642 | } |
1643 | ||
55e44363 MD |
1644 | static int |
1645 | elf_puttextvp(struct proc *p, elf_buf_t target) | |
731100e5 | 1646 | { |
55e44363 | 1647 | int error = 0; |
731100e5 | 1648 | int *vn_count; |
5a5c6af6 MD |
1649 | struct fp_closure fpc; |
1650 | struct ckpt_vminfo *vminfo; | |
1651 | ||
55e44363 MD |
1652 | vminfo = target_reserve(target, sizeof(struct ckpt_vminfo), &error); |
1653 | if (vminfo != NULL) { | |
5a5c6af6 MD |
1654 | vminfo->cvm_dsize = p->p_vmspace->vm_dsize; |
1655 | vminfo->cvm_tsize = p->p_vmspace->vm_tsize; | |
1656 | vminfo->cvm_daddr = p->p_vmspace->vm_daddr; | |
1657 | vminfo->cvm_taddr = p->p_vmspace->vm_taddr; | |
731100e5 | 1658 | } |
5a5c6af6 | 1659 | |
731100e5 | 1660 | fpc.count = 0; |
55e44363 MD |
1661 | vn_count = target_reserve(target, sizeof(int), &error); |
1662 | if (target->buf != NULL) { | |
1663 | fpc.vnh = (struct vn_hdr *)(target->buf + target->off); | |
1664 | fpc.vnh_max = fpc.vnh + | |
1665 | (target->off_max - target->off) / sizeof(struct vn_hdr); | |
1666 | error = each_segment(p, cb_put_fp, &fpc, 0); | |
1667 | if (vn_count) | |
1668 | *vn_count = fpc.count; | |
5a5c6af6 | 1669 | } else { |
55e44363 | 1670 | error = each_segment(p, cb_fpcount_segment, &fpc.count, 0); |
5a5c6af6 | 1671 | } |
55e44363 MD |
1672 | target->off += fpc.count * sizeof(struct vn_hdr); |
1673 | return(error); | |
731100e5 MD |
1674 | } |
1675 | ||
1676 | ||
984263bc MD |
1677 | /* |
1678 | * Tell kern_execve.c about it, with a little help from the linker. | |
1679 | */ | |
1680 | static struct execsw elf_execsw = {exec_elf_imgact, "ELF"}; | |
1843e3f2 | 1681 | EXEC_SET_ORDERED(elf, elf_execsw, SI_ORDER_FIRST); |