2 * Copyright (c) 2000 David O'Brien
3 * Copyright (c) 1995-1996 Søren Schmidt
4 * Copyright (c) 1996 Peter Wemm
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include "opt_capsicum.h"
35 #include "opt_compat.h"
38 #include <sys/param.h>
39 #include <sys/capsicum.h>
41 #include <sys/fcntl.h>
43 #include <sys/imgact.h>
44 #include <sys/imgact_elf.h>
46 #include <sys/kernel.h>
48 #include <sys/malloc.h>
49 #include <sys/mount.h>
51 #include <sys/namei.h>
52 #include <sys/pioctl.h>
54 #include <sys/procfs.h>
55 #include <sys/racct.h>
56 #include <sys/resourcevar.h>
57 #include <sys/rwlock.h>
59 #include <sys/sf_buf.h>
61 #include <sys/systm.h>
62 #include <sys/signalvar.h>
65 #include <sys/syscall.h>
66 #include <sys/sysctl.h>
67 #include <sys/sysent.h>
68 #include <sys/vnode.h>
69 #include <sys/syslog.h>
70 #include <sys/eventhandler.h>
74 #include <vm/vm_kern.h>
75 #include <vm/vm_param.h>
77 #include <vm/vm_map.h>
78 #include <vm/vm_object.h>
79 #include <vm/vm_extern.h>
81 #include <machine/elf.h>
82 #include <machine/md_var.h>
84 #define ELF_NOTE_ROUNDSIZE 4
85 #define OLD_EI_BRAND 8
87 static int __elfN(check_header)(const Elf_Ehdr *hdr);
88 static Elf_Brandinfo *__elfN(get_brandinfo)(struct image_params *imgp,
89 const char *interp, int interp_name_len, int32_t *osrel);
90 static int __elfN(load_file)(struct proc *p, const char *file, u_long *addr,
91 u_long *entry, size_t pagesize);
92 static int __elfN(load_section)(struct image_params *imgp, vm_ooffset_t offset,
93 caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot,
95 static int __CONCAT(exec_, __elfN(imgact))(struct image_params *imgp);
96 static boolean_t __elfN(freebsd_trans_osrel)(const Elf_Note *note,
98 static boolean_t kfreebsd_trans_osrel(const Elf_Note *note, int32_t *osrel);
99 static boolean_t __elfN(check_note)(struct image_params *imgp,
100 Elf_Brandnote *checknote, int32_t *osrel);
101 static vm_prot_t __elfN(trans_prot)(Elf_Word);
102 static Elf_Word __elfN(untrans_prot)(vm_prot_t);
104 SYSCTL_NODE(_kern, OID_AUTO, __CONCAT(elf, __ELF_WORD_SIZE), CTLFLAG_RW, 0,
107 #define CORE_BUF_SIZE (16 * 1024)
109 int __elfN(fallback_brand) = -1;
110 SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO,
111 fallback_brand, CTLFLAG_RWTUN, &__elfN(fallback_brand), 0,
112 __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) " brand of last resort");
114 static int elf_legacy_coredump = 0;
115 SYSCTL_INT(_debug, OID_AUTO, __elfN(legacy_coredump), CTLFLAG_RW,
116 &elf_legacy_coredump, 0,
117 "include all and only RW pages in core dumps");
119 int __elfN(nxstack) =
120 #if defined(__amd64__) || defined(__powerpc64__) /* both 64 and 32 bit */ || \
121 (defined(__arm__) && __ARM_ARCH >= 7) || defined(__aarch64__)
126 SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO,
127 nxstack, CTLFLAG_RW, &__elfN(nxstack), 0,
128 __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": enable non-executable stack");
130 #if __ELF_WORD_SIZE == 32
131 #if defined(__amd64__)
132 int i386_read_exec = 0;
133 SYSCTL_INT(_kern_elf32, OID_AUTO, read_exec, CTLFLAG_RW, &i386_read_exec, 0,
134 "enable execution from readable segments");
138 static Elf_Brandinfo *elf_brand_list[MAX_BRANDS];
140 #define trunc_page_ps(va, ps) rounddown2(va, ps)
141 #define round_page_ps(va, ps) roundup2(va, ps)
142 #define aligned(a, t) (trunc_page_ps((u_long)(a), sizeof(t)) == (u_long)(a))
144 static const char FREEBSD_ABI_VENDOR[] = "FreeBSD";
146 Elf_Brandnote __elfN(freebsd_brandnote) = {
147 .hdr.n_namesz = sizeof(FREEBSD_ABI_VENDOR),
148 .hdr.n_descsz = sizeof(int32_t),
149 .hdr.n_type = NT_FREEBSD_ABI_TAG,
150 .vendor = FREEBSD_ABI_VENDOR,
151 .flags = BN_TRANSLATE_OSREL,
152 .trans_osrel = __elfN(freebsd_trans_osrel)
156 __elfN(freebsd_trans_osrel)(const Elf_Note *note, int32_t *osrel)
160 p = (uintptr_t)(note + 1);
161 p += roundup2(note->n_namesz, ELF_NOTE_ROUNDSIZE);
162 *osrel = *(const int32_t *)(p);
167 static const char GNU_ABI_VENDOR[] = "GNU";
168 static int GNU_KFREEBSD_ABI_DESC = 3;
170 Elf_Brandnote __elfN(kfreebsd_brandnote) = {
171 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR),
172 .hdr.n_descsz = 16, /* XXX at least 16 */
174 .vendor = GNU_ABI_VENDOR,
175 .flags = BN_TRANSLATE_OSREL,
176 .trans_osrel = kfreebsd_trans_osrel
180 kfreebsd_trans_osrel(const Elf_Note *note, int32_t *osrel)
182 const Elf32_Word *desc;
185 p = (uintptr_t)(note + 1);
186 p += roundup2(note->n_namesz, ELF_NOTE_ROUNDSIZE);
188 desc = (const Elf32_Word *)p;
189 if (desc[0] != GNU_KFREEBSD_ABI_DESC)
193 * Debian GNU/kFreeBSD embed the earliest compatible kernel version
194 * (__FreeBSD_version: <major><two digit minor>Rxx) in the LSB way.
196 *osrel = desc[1] * 100000 + desc[2] * 1000 + desc[3];
202 __elfN(insert_brand_entry)(Elf_Brandinfo *entry)
206 for (i = 0; i < MAX_BRANDS; i++) {
207 if (elf_brand_list[i] == NULL) {
208 elf_brand_list[i] = entry;
212 if (i == MAX_BRANDS) {
213 printf("WARNING: %s: could not insert brandinfo entry: %p\n",
221 __elfN(remove_brand_entry)(Elf_Brandinfo *entry)
225 for (i = 0; i < MAX_BRANDS; i++) {
226 if (elf_brand_list[i] == entry) {
227 elf_brand_list[i] = NULL;
237 __elfN(brand_inuse)(Elf_Brandinfo *entry)
242 sx_slock(&allproc_lock);
243 FOREACH_PROC_IN_SYSTEM(p) {
244 if (p->p_sysent == entry->sysvec) {
249 sx_sunlock(&allproc_lock);
254 static Elf_Brandinfo *
255 __elfN(get_brandinfo)(struct image_params *imgp, const char *interp,
256 int interp_name_len, int32_t *osrel)
258 const Elf_Ehdr *hdr = (const Elf_Ehdr *)imgp->image_header;
259 Elf_Brandinfo *bi, *bi_m;
264 * We support four types of branding -- (1) the ELF EI_OSABI field
265 * that SCO added to the ELF spec, (2) FreeBSD 3.x's traditional string
266 * branding w/in the ELF header, (3) path of the `interp_path'
267 * field, and (4) the ".note.ABI-tag" ELF section.
270 /* Look for an ".note.ABI-tag" ELF section */
272 for (i = 0; i < MAX_BRANDS; i++) {
273 bi = elf_brand_list[i];
276 if (interp != NULL && (bi->flags & BI_BRAND_ONLY_STATIC) != 0)
278 if (hdr->e_machine == bi->machine && (bi->flags &
279 (BI_BRAND_NOTE|BI_BRAND_NOTE_MANDATORY)) != 0) {
280 ret = __elfN(check_note)(imgp, bi->brand_note, osrel);
281 /* Give brand a chance to veto check_note's guess */
282 if (ret && bi->header_supported)
283 ret = bi->header_supported(imgp);
285 * If note checker claimed the binary, but the
286 * interpreter path in the image does not
287 * match default one for the brand, try to
288 * search for other brands with the same
289 * interpreter. Either there is better brand
290 * with the right interpreter, or, failing
291 * this, we return first brand which accepted
292 * our note and, optionally, header.
294 if (ret && bi_m == NULL && interp != NULL &&
295 (bi->interp_path == NULL ||
296 (strlen(bi->interp_path) + 1 != interp_name_len ||
297 strncmp(interp, bi->interp_path, interp_name_len)
309 /* If the executable has a brand, search for it in the brand list. */
310 for (i = 0; i < MAX_BRANDS; i++) {
311 bi = elf_brand_list[i];
312 if (bi == NULL || (bi->flags & BI_BRAND_NOTE_MANDATORY) != 0 ||
313 (interp != NULL && (bi->flags & BI_BRAND_ONLY_STATIC) != 0))
315 if (hdr->e_machine == bi->machine &&
316 (hdr->e_ident[EI_OSABI] == bi->brand ||
317 (bi->compat_3_brand != NULL &&
318 strcmp((const char *)&hdr->e_ident[OLD_EI_BRAND],
319 bi->compat_3_brand) == 0))) {
320 /* Looks good, but give brand a chance to veto */
321 if (!bi->header_supported ||
322 bi->header_supported(imgp)) {
324 * Again, prefer strictly matching
327 if (interp_name_len == 0 &&
328 bi->interp_path == NULL)
330 if (bi->interp_path != NULL &&
331 strlen(bi->interp_path) + 1 ==
332 interp_name_len && strncmp(interp,
333 bi->interp_path, interp_name_len) == 0)
343 /* No known brand, see if the header is recognized by any brand */
344 for (i = 0; i < MAX_BRANDS; i++) {
345 bi = elf_brand_list[i];
346 if (bi == NULL || bi->flags & BI_BRAND_NOTE_MANDATORY ||
347 bi->header_supported == NULL)
349 if (hdr->e_machine == bi->machine) {
350 ret = bi->header_supported(imgp);
356 /* Lacking a known brand, search for a recognized interpreter. */
357 if (interp != NULL) {
358 for (i = 0; i < MAX_BRANDS; i++) {
359 bi = elf_brand_list[i];
360 if (bi == NULL || (bi->flags &
361 (BI_BRAND_NOTE_MANDATORY | BI_BRAND_ONLY_STATIC))
364 if (hdr->e_machine == bi->machine &&
365 bi->interp_path != NULL &&
366 /* ELF image p_filesz includes terminating zero */
367 strlen(bi->interp_path) + 1 == interp_name_len &&
368 strncmp(interp, bi->interp_path, interp_name_len)
374 /* Lacking a recognized interpreter, try the default brand */
375 for (i = 0; i < MAX_BRANDS; i++) {
376 bi = elf_brand_list[i];
377 if (bi == NULL || (bi->flags & BI_BRAND_NOTE_MANDATORY) != 0 ||
378 (interp != NULL && (bi->flags & BI_BRAND_ONLY_STATIC) != 0))
380 if (hdr->e_machine == bi->machine &&
381 __elfN(fallback_brand) == bi->brand)
388 __elfN(check_header)(const Elf_Ehdr *hdr)
394 hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS ||
395 hdr->e_ident[EI_DATA] != ELF_TARG_DATA ||
396 hdr->e_ident[EI_VERSION] != EV_CURRENT ||
397 hdr->e_phentsize != sizeof(Elf_Phdr) ||
398 hdr->e_version != ELF_TARG_VER)
402 * Make sure we have at least one brand for this machine.
405 for (i = 0; i < MAX_BRANDS; i++) {
406 bi = elf_brand_list[i];
407 if (bi != NULL && bi->machine == hdr->e_machine)
417 __elfN(map_partial)(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
418 vm_offset_t start, vm_offset_t end, vm_prot_t prot)
425 * Create the page if it doesn't exist yet. Ignore errors.
427 vm_map_fixed(map, NULL, 0, trunc_page(start), round_page(end) -
428 trunc_page(start), VM_PROT_ALL, VM_PROT_ALL, MAP_CHECK_EXCL);
431 * Find the page from the underlying object.
433 if (object != NULL) {
434 sf = vm_imgact_map_page(object, offset);
436 return (KERN_FAILURE);
437 off = offset - trunc_page(offset);
438 error = copyout((caddr_t)sf_buf_kva(sf) + off, (caddr_t)start,
440 vm_imgact_unmap_page(sf);
442 return (KERN_FAILURE);
445 return (KERN_SUCCESS);
449 __elfN(map_insert)(struct image_params *imgp, vm_map_t map, vm_object_t object,
450 vm_ooffset_t offset, vm_offset_t start, vm_offset_t end, vm_prot_t prot,
456 int error, locked, rv;
458 if (start != trunc_page(start)) {
459 rv = __elfN(map_partial)(map, object, offset, start,
460 round_page(start), prot);
461 if (rv != KERN_SUCCESS)
463 offset += round_page(start) - start;
464 start = round_page(start);
466 if (end != round_page(end)) {
467 rv = __elfN(map_partial)(map, object, offset +
468 trunc_page(end) - start, trunc_page(end), end, prot);
469 if (rv != KERN_SUCCESS)
471 end = trunc_page(end);
474 return (KERN_SUCCESS);
475 if ((offset & PAGE_MASK) != 0) {
477 * The mapping is not page aligned. This means that we have
480 rv = vm_map_fixed(map, NULL, 0, start, end - start,
481 prot | VM_PROT_WRITE, VM_PROT_ALL, MAP_CHECK_EXCL);
482 if (rv != KERN_SUCCESS)
485 return (KERN_SUCCESS);
486 for (; start < end; start += sz) {
487 sf = vm_imgact_map_page(object, offset);
489 return (KERN_FAILURE);
490 off = offset - trunc_page(offset);
492 if (sz > PAGE_SIZE - off)
493 sz = PAGE_SIZE - off;
494 error = copyout((caddr_t)sf_buf_kva(sf) + off,
496 vm_imgact_unmap_page(sf);
498 return (KERN_FAILURE);
502 vm_object_reference(object);
503 rv = vm_map_fixed(map, object, offset, start, end - start,
504 prot, VM_PROT_ALL, cow | MAP_CHECK_EXCL);
505 if (rv != KERN_SUCCESS) {
506 locked = VOP_ISLOCKED(imgp->vp);
507 VOP_UNLOCK(imgp->vp, 0);
508 vm_object_deallocate(object);
509 vn_lock(imgp->vp, locked | LK_RETRY);
513 return (KERN_SUCCESS);
517 __elfN(load_section)(struct image_params *imgp, vm_ooffset_t offset,
518 caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot,
525 vm_offset_t off, map_addr;
528 vm_ooffset_t file_addr;
531 * It's necessary to fail if the filsz + offset taken from the
532 * header is greater than the actual file pager object's size.
533 * If we were to allow this, then the vm_map_find() below would
534 * walk right off the end of the file object and into the ether.
536 * While I'm here, might as well check for something else that
537 * is invalid: filsz cannot be greater than memsz.
539 if ((filsz != 0 && (off_t)filsz + offset > imgp->attr->va_size) ||
541 uprintf("elf_load_section: truncated ELF file\n");
545 object = imgp->object;
546 map = &imgp->proc->p_vmspace->vm_map;
547 map_addr = trunc_page_ps((vm_offset_t)vmaddr, pagesize);
548 file_addr = trunc_page_ps(offset, pagesize);
551 * We have two choices. We can either clear the data in the last page
552 * of an oversized mapping, or we can start the anon mapping a page
553 * early and copy the initialized data into that first page. We
558 else if (memsz > filsz)
559 map_len = trunc_page_ps(offset + filsz, pagesize) - file_addr;
561 map_len = round_page_ps(offset + filsz, pagesize) - file_addr;
564 /* cow flags: don't dump readonly sections in core */
565 cow = MAP_COPY_ON_WRITE | MAP_PREFAULT |
566 (prot & VM_PROT_WRITE ? 0 : MAP_DISABLE_COREDUMP);
568 rv = __elfN(map_insert)(imgp, map,
570 file_addr, /* file offset */
571 map_addr, /* virtual start */
572 map_addr + map_len,/* virtual end */
575 if (rv != KERN_SUCCESS)
578 /* we can stop now if we've covered it all */
585 * We have to get the remaining bit of the file into the first part
586 * of the oversized map segment. This is normally because the .data
587 * segment in the file is extended to provide bss. It's a neat idea
588 * to try and save a page, but it's a pain in the behind to implement.
590 copy_len = filsz == 0 ? 0 : (offset + filsz) - trunc_page_ps(offset +
592 map_addr = trunc_page_ps((vm_offset_t)vmaddr + filsz, pagesize);
593 map_len = round_page_ps((vm_offset_t)vmaddr + memsz, pagesize) -
596 /* This had damn well better be true! */
598 rv = __elfN(map_insert)(imgp, map, NULL, 0, map_addr,
599 map_addr + map_len, prot, 0);
600 if (rv != KERN_SUCCESS)
605 sf = vm_imgact_map_page(object, offset + filsz);
609 /* send the page fragment to user space */
610 off = trunc_page_ps(offset + filsz, pagesize) -
611 trunc_page(offset + filsz);
612 error = copyout((caddr_t)sf_buf_kva(sf) + off,
613 (caddr_t)map_addr, copy_len);
614 vm_imgact_unmap_page(sf);
620 * Remove write access to the page if it was only granted by map_insert
623 if ((prot & VM_PROT_WRITE) == 0)
624 vm_map_protect(map, trunc_page(map_addr), round_page(map_addr +
625 map_len), prot, FALSE);
631 * Load the file "file" into memory. It may be either a shared object
634 * The "addr" reference parameter is in/out. On entry, it specifies
635 * the address where a shared object should be loaded. If the file is
636 * an executable, this value is ignored. On exit, "addr" specifies
637 * where the file was actually loaded.
639 * The "entry" reference parameter is out only. On exit, it specifies
640 * the entry point for the loaded file.
643 __elfN(load_file)(struct proc *p, const char *file, u_long *addr,
644 u_long *entry, size_t pagesize)
649 struct image_params image_params;
651 const Elf_Ehdr *hdr = NULL;
652 const Elf_Phdr *phdr = NULL;
653 struct nameidata *nd;
655 struct image_params *imgp;
658 u_long base_addr = 0;
659 int error, i, numsegs;
661 #ifdef CAPABILITY_MODE
663 * XXXJA: This check can go away once we are sufficiently confident
664 * that the checks in namei() are correct.
666 if (IN_CAPABILITY_MODE(curthread))
670 tempdata = malloc(sizeof(*tempdata), M_TEMP, M_WAITOK);
672 attr = &tempdata->attr;
673 imgp = &tempdata->image_params;
676 * Initialize part of the common data
680 imgp->firstpage = NULL;
681 imgp->image_header = NULL;
683 imgp->execlabel = NULL;
685 NDINIT(nd, LOOKUP, LOCKLEAF | FOLLOW, UIO_SYSSPACE, file, curthread);
686 if ((error = namei(nd)) != 0) {
690 NDFREE(nd, NDF_ONLY_PNBUF);
691 imgp->vp = nd->ni_vp;
694 * Check permissions, modes, uid, etc on the file, and "open" it.
696 error = exec_check_permissions(imgp);
700 error = exec_map_first_page(imgp);
705 * Also make certain that the interpreter stays the same, so set
706 * its VV_TEXT flag, too.
708 VOP_SET_TEXT(nd->ni_vp);
710 imgp->object = nd->ni_vp->v_object;
712 hdr = (const Elf_Ehdr *)imgp->image_header;
713 if ((error = __elfN(check_header)(hdr)) != 0)
715 if (hdr->e_type == ET_DYN)
717 else if (hdr->e_type == ET_EXEC)
724 /* Only support headers that fit within first page for now */
725 if ((hdr->e_phoff > PAGE_SIZE) ||
726 (u_int)hdr->e_phentsize * hdr->e_phnum > PAGE_SIZE - hdr->e_phoff) {
731 phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff);
732 if (!aligned(phdr, Elf_Addr)) {
737 for (i = 0, numsegs = 0; i < hdr->e_phnum; i++) {
738 if (phdr[i].p_type == PT_LOAD && phdr[i].p_memsz != 0) {
739 /* Loadable segment */
740 prot = __elfN(trans_prot)(phdr[i].p_flags);
741 error = __elfN(load_section)(imgp, phdr[i].p_offset,
742 (caddr_t)(uintptr_t)phdr[i].p_vaddr + rbase,
743 phdr[i].p_memsz, phdr[i].p_filesz, prot, pagesize);
747 * Establish the base address if this is the
751 base_addr = trunc_page(phdr[i].p_vaddr +
757 *entry = (unsigned long)hdr->e_entry + rbase;
761 exec_unmap_first_page(imgp);
766 free(tempdata, M_TEMP);
772 __CONCAT(exec_, __elfN(imgact))(struct image_params *imgp)
776 const Elf_Phdr *phdr;
777 Elf_Auxargs *elf_auxargs;
778 struct vmspace *vmspace;
779 const char *err_str, *newinterp;
780 char *interp, *interp_buf, *path;
781 Elf_Brandinfo *brand_info;
782 struct sysentvec *sv;
784 u_long text_size, data_size, total_size, text_addr, data_addr;
785 u_long seg_size, seg_addr, addr, baddr, et_dyn_addr, entry, proghdr;
787 int error, i, n, interp_name_len, have_interp;
789 hdr = (const Elf_Ehdr *)imgp->image_header;
792 * Do we have a valid ELF header ?
794 * Only allow ET_EXEC & ET_DYN here, reject ET_DYN later
795 * if particular brand doesn't support it.
797 if (__elfN(check_header)(hdr) != 0 ||
798 (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN))
802 * From here on down, we return an errno, not -1, as we've
803 * detected an ELF file.
806 if ((hdr->e_phoff > PAGE_SIZE) ||
807 (u_int)hdr->e_phentsize * hdr->e_phnum > PAGE_SIZE - hdr->e_phoff) {
808 /* Only support headers in first page for now */
809 uprintf("Program headers not in the first page\n");
812 phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff);
813 if (!aligned(phdr, Elf_Addr)) {
814 uprintf("Unaligned program headers\n");
821 text_size = data_size = total_size = text_addr = data_addr = 0;
824 err_str = newinterp = NULL;
825 interp = interp_buf = NULL;
828 for (i = 0; i < hdr->e_phnum; i++) {
829 switch (phdr[i].p_type) {
832 baddr = phdr[i].p_vaddr;
836 /* Path to interpreter */
837 if (phdr[i].p_filesz > MAXPATHLEN) {
838 uprintf("Invalid PT_INTERP\n");
842 if (interp != NULL) {
843 uprintf("Multiple PT_INTERP headers\n");
847 interp_name_len = phdr[i].p_filesz;
848 if (phdr[i].p_offset > PAGE_SIZE ||
849 interp_name_len > PAGE_SIZE - phdr[i].p_offset) {
850 VOP_UNLOCK(imgp->vp, 0);
851 interp_buf = malloc(interp_name_len + 1, M_TEMP,
853 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
854 error = vn_rdwr(UIO_READ, imgp->vp, interp_buf,
855 interp_name_len, phdr[i].p_offset,
856 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred,
859 uprintf("i/o error PT_INTERP\n");
862 interp_buf[interp_name_len] = '\0';
865 interp = __DECONST(char *, imgp->image_header) +
872 __elfN(trans_prot)(phdr[i].p_flags);
873 imgp->stack_sz = phdr[i].p_memsz;
878 brand_info = __elfN(get_brandinfo)(imgp, interp, interp_name_len,
880 if (brand_info == NULL) {
881 uprintf("ELF binary type \"%u\" not known.\n",
882 hdr->e_ident[EI_OSABI]);
886 if (hdr->e_type == ET_DYN) {
887 if ((brand_info->flags & BI_CAN_EXEC_DYN) == 0) {
888 uprintf("Cannot execute shared object\n");
893 * Honour the base load address from the dso if it is
894 * non-zero for some reason.
897 et_dyn_addr = ET_DYN_LOAD_ADDR;
902 sv = brand_info->sysvec;
903 if (interp != NULL && brand_info->interp_newpath != NULL)
904 newinterp = brand_info->interp_newpath;
907 * Avoid a possible deadlock if the current address space is destroyed
908 * and that address space maps the locked vnode. In the common case,
909 * the locked vnode's v_usecount is decremented but remains greater
910 * than zero. Consequently, the vnode lock is not needed by vrele().
911 * However, in cases where the vnode lock is external, such as nullfs,
912 * v_usecount may become zero.
914 * The VV_TEXT flag prevents modifications to the executable while
915 * the vnode is unlocked.
917 VOP_UNLOCK(imgp->vp, 0);
919 error = exec_new_vmspace(imgp, sv);
920 imgp->proc->p_sysent = sv;
922 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
926 for (i = 0; i < hdr->e_phnum; i++) {
927 switch (phdr[i].p_type) {
928 case PT_LOAD: /* Loadable segment */
929 if (phdr[i].p_memsz == 0)
931 prot = __elfN(trans_prot)(phdr[i].p_flags);
932 error = __elfN(load_section)(imgp, phdr[i].p_offset,
933 (caddr_t)(uintptr_t)phdr[i].p_vaddr + et_dyn_addr,
934 phdr[i].p_memsz, phdr[i].p_filesz, prot,
940 * If this segment contains the program headers,
941 * remember their virtual address for the AT_PHDR
942 * aux entry. Static binaries don't usually include
945 if (phdr[i].p_offset == 0 &&
946 hdr->e_phoff + hdr->e_phnum * hdr->e_phentsize
948 proghdr = phdr[i].p_vaddr + hdr->e_phoff +
951 seg_addr = trunc_page(phdr[i].p_vaddr + et_dyn_addr);
952 seg_size = round_page(phdr[i].p_memsz +
953 phdr[i].p_vaddr + et_dyn_addr - seg_addr);
956 * Make the largest executable segment the official
957 * text segment and all others data.
959 * Note that obreak() assumes that data_addr +
960 * data_size == end of data load area, and the ELF
961 * file format expects segments to be sorted by
962 * address. If multiple data segments exist, the
963 * last one will be used.
966 if (phdr[i].p_flags & PF_X && text_size < seg_size) {
967 text_size = seg_size;
968 text_addr = seg_addr;
970 data_size = seg_size;
971 data_addr = seg_addr;
973 total_size += seg_size;
975 case PT_PHDR: /* Program header table info */
976 proghdr = phdr[i].p_vaddr + et_dyn_addr;
983 if (data_addr == 0 && data_size == 0) {
984 data_addr = text_addr;
985 data_size = text_size;
988 entry = (u_long)hdr->e_entry + et_dyn_addr;
991 * Check limits. It should be safe to check the
992 * limits after loading the segments since we do
993 * not actually fault in all the segments pages.
995 PROC_LOCK(imgp->proc);
996 if (data_size > lim_cur_proc(imgp->proc, RLIMIT_DATA))
997 err_str = "Data segment size exceeds process limit";
998 else if (text_size > maxtsiz)
999 err_str = "Text segment size exceeds system limit";
1000 else if (total_size > lim_cur_proc(imgp->proc, RLIMIT_VMEM))
1001 err_str = "Total segment size exceeds process limit";
1002 else if (racct_set(imgp->proc, RACCT_DATA, data_size) != 0)
1003 err_str = "Data segment size exceeds resource limit";
1004 else if (racct_set(imgp->proc, RACCT_VMEM, total_size) != 0)
1005 err_str = "Total segment size exceeds resource limit";
1006 if (err_str != NULL) {
1007 PROC_UNLOCK(imgp->proc);
1008 uprintf("%s\n", err_str);
1013 vmspace = imgp->proc->p_vmspace;
1014 vmspace->vm_tsize = text_size >> PAGE_SHIFT;
1015 vmspace->vm_taddr = (caddr_t)(uintptr_t)text_addr;
1016 vmspace->vm_dsize = data_size >> PAGE_SHIFT;
1017 vmspace->vm_daddr = (caddr_t)(uintptr_t)data_addr;
1020 * We load the dynamic linker where a userland call
1021 * to mmap(0, ...) would put it. The rationale behind this
1022 * calculation is that it leaves room for the heap to grow to
1023 * its maximum allowed size.
1025 addr = round_page((vm_offset_t)vmspace->vm_daddr + lim_max(td,
1027 PROC_UNLOCK(imgp->proc);
1029 imgp->entry_addr = entry;
1031 if (interp != NULL) {
1032 have_interp = FALSE;
1033 VOP_UNLOCK(imgp->vp, 0);
1034 if (brand_info->emul_path != NULL &&
1035 brand_info->emul_path[0] != '\0') {
1036 path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
1037 snprintf(path, MAXPATHLEN, "%s%s",
1038 brand_info->emul_path, interp);
1039 error = __elfN(load_file)(imgp->proc, path, &addr,
1040 &imgp->entry_addr, sv->sv_pagesize);
1045 if (!have_interp && newinterp != NULL &&
1046 (brand_info->interp_path == NULL ||
1047 strcmp(interp, brand_info->interp_path) == 0)) {
1048 error = __elfN(load_file)(imgp->proc, newinterp, &addr,
1049 &imgp->entry_addr, sv->sv_pagesize);
1054 error = __elfN(load_file)(imgp->proc, interp, &addr,
1055 &imgp->entry_addr, sv->sv_pagesize);
1057 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
1059 uprintf("ELF interpreter %s not found, error %d\n",
1067 * Construct auxargs table (used by the fixup routine)
1069 elf_auxargs = malloc(sizeof(Elf_Auxargs), M_TEMP, M_WAITOK);
1070 elf_auxargs->execfd = -1;
1071 elf_auxargs->phdr = proghdr;
1072 elf_auxargs->phent = hdr->e_phentsize;
1073 elf_auxargs->phnum = hdr->e_phnum;
1074 elf_auxargs->pagesz = PAGE_SIZE;
1075 elf_auxargs->base = addr;
1076 elf_auxargs->flags = 0;
1077 elf_auxargs->entry = entry;
1078 elf_auxargs->hdr_eflags = hdr->e_flags;
1080 imgp->auxargs = elf_auxargs;
1081 imgp->interpreted = 0;
1082 imgp->reloc_base = addr;
1083 imgp->proc->p_osrel = osrel;
1084 imgp->proc->p_elf_machine = hdr->e_machine;
1085 imgp->proc->p_elf_flags = hdr->e_flags;
1088 free(interp_buf, M_TEMP);
1092 #define suword __CONCAT(suword, __ELF_WORD_SIZE)
1095 __elfN(freebsd_fixup)(register_t **stack_base, struct image_params *imgp)
1097 Elf_Auxargs *args = (Elf_Auxargs *)imgp->auxargs;
1101 base = (Elf_Addr *)*stack_base;
1102 pos = base + (imgp->args->argc + imgp->args->envc + 2);
1104 if (args->execfd != -1)
1105 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
1106 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
1107 AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
1108 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
1109 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
1110 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
1111 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
1112 AUXARGS_ENTRY(pos, AT_BASE, args->base);
1113 AUXARGS_ENTRY(pos, AT_EHDRFLAGS, args->hdr_eflags);
1114 if (imgp->execpathp != 0)
1115 AUXARGS_ENTRY(pos, AT_EXECPATH, imgp->execpathp);
1116 AUXARGS_ENTRY(pos, AT_OSRELDATE,
1117 imgp->proc->p_ucred->cr_prison->pr_osreldate);
1118 if (imgp->canary != 0) {
1119 AUXARGS_ENTRY(pos, AT_CANARY, imgp->canary);
1120 AUXARGS_ENTRY(pos, AT_CANARYLEN, imgp->canarylen);
1122 AUXARGS_ENTRY(pos, AT_NCPUS, mp_ncpus);
1123 if (imgp->pagesizes != 0) {
1124 AUXARGS_ENTRY(pos, AT_PAGESIZES, imgp->pagesizes);
1125 AUXARGS_ENTRY(pos, AT_PAGESIZESLEN, imgp->pagesizeslen);
1127 if (imgp->sysent->sv_timekeep_base != 0) {
1128 AUXARGS_ENTRY(pos, AT_TIMEKEEP,
1129 imgp->sysent->sv_timekeep_base);
1131 AUXARGS_ENTRY(pos, AT_STACKPROT, imgp->sysent->sv_shared_page_obj
1132 != NULL && imgp->stack_prot != 0 ? imgp->stack_prot :
1133 imgp->sysent->sv_stackprot);
1134 if ((imgp->sysent->sv_flags & SV_HWCAP) != 0 &&
1135 imgp->sysent->sv_hwcap != NULL)
1136 AUXARGS_ENTRY(pos, AT_HWCAP, *imgp->sysent->sv_hwcap);
1137 AUXARGS_ENTRY(pos, AT_NULL, 0);
1139 free(imgp->auxargs, M_TEMP);
1140 imgp->auxargs = NULL;
1143 suword(base, (long)imgp->args->argc);
1144 *stack_base = (register_t *)base;
1149 * Code for generating ELF core dumps.
1152 typedef void (*segment_callback)(vm_map_entry_t, void *);
1154 /* Closure for cb_put_phdr(). */
1155 struct phdr_closure {
1156 Elf_Phdr *phdr; /* Program header to fill in */
1157 Elf_Off offset; /* Offset of segment in core file */
1160 /* Closure for cb_size_segment(). */
1161 struct sseg_closure {
1162 int count; /* Count of writable segments. */
1163 size_t size; /* Total size of all writable segments. */
1166 typedef void (*outfunc_t)(void *, struct sbuf *, size_t *);
1169 int type; /* Note type. */
1170 outfunc_t outfunc; /* Output function. */
1171 void *outarg; /* Argument for the output function. */
1172 size_t outsize; /* Output size. */
1173 TAILQ_ENTRY(note_info) link; /* Link to the next note info. */
1176 TAILQ_HEAD(note_info_list, note_info);
1178 /* Coredump output parameters. */
1179 struct coredump_params {
1181 struct ucred *active_cred;
1182 struct ucred *file_cred;
1185 struct gzio_stream *gzs;
1188 static void cb_put_phdr(vm_map_entry_t, void *);
1189 static void cb_size_segment(vm_map_entry_t, void *);
1190 static int core_write(struct coredump_params *, const void *, size_t, off_t,
1192 static void each_writable_segment(struct thread *, segment_callback, void *);
1193 static int __elfN(corehdr)(struct coredump_params *, int, void *, size_t,
1194 struct note_info_list *, size_t);
1195 static void __elfN(prepare_notes)(struct thread *, struct note_info_list *,
1197 static void __elfN(puthdr)(struct thread *, void *, size_t, int, size_t);
1198 static void __elfN(putnote)(struct note_info *, struct sbuf *);
1199 static size_t register_note(struct note_info_list *, int, outfunc_t, void *);
1200 static int sbuf_drain_core_output(void *, const char *, int);
1201 static int sbuf_drain_count(void *arg, const char *data, int len);
1203 static void __elfN(note_fpregset)(void *, struct sbuf *, size_t *);
1204 static void __elfN(note_prpsinfo)(void *, struct sbuf *, size_t *);
1205 static void __elfN(note_prstatus)(void *, struct sbuf *, size_t *);
1206 static void __elfN(note_threadmd)(void *, struct sbuf *, size_t *);
1207 static void __elfN(note_thrmisc)(void *, struct sbuf *, size_t *);
1208 static void __elfN(note_procstat_auxv)(void *, struct sbuf *, size_t *);
1209 static void __elfN(note_procstat_proc)(void *, struct sbuf *, size_t *);
1210 static void __elfN(note_procstat_psstrings)(void *, struct sbuf *, size_t *);
1211 static void note_procstat_files(void *, struct sbuf *, size_t *);
1212 static void note_procstat_groups(void *, struct sbuf *, size_t *);
1213 static void note_procstat_osrel(void *, struct sbuf *, size_t *);
1214 static void note_procstat_rlimit(void *, struct sbuf *, size_t *);
1215 static void note_procstat_umask(void *, struct sbuf *, size_t *);
1216 static void note_procstat_vmmap(void *, struct sbuf *, size_t *);
1219 extern int compress_user_cores_gzlevel;
1222 * Write out a core segment to the compression stream.
1225 compress_chunk(struct coredump_params *p, char *base, char *buf, u_int len)
1231 chunk_len = MIN(len, CORE_BUF_SIZE);
1234 * We can get EFAULT error here.
1235 * In that case zero out the current chunk of the segment.
1237 error = copyin(base, buf, chunk_len);
1239 bzero(buf, chunk_len);
1240 error = gzio_write(p->gzs, buf, chunk_len);
1250 core_gz_write(void *base, size_t len, off_t offset, void *arg)
1253 return (core_write((struct coredump_params *)arg, base, len, offset,
1259 core_write(struct coredump_params *p, const void *base, size_t len,
1260 off_t offset, enum uio_seg seg)
1263 return (vn_rdwr_inchunks(UIO_WRITE, p->vp, __DECONST(void *, base),
1264 len, offset, seg, IO_UNIT | IO_DIRECT | IO_RANGELOCKED,
1265 p->active_cred, p->file_cred, NULL, p->td));
1269 core_output(void *base, size_t len, off_t offset, struct coredump_params *p,
1276 return (compress_chunk(p, base, tmpbuf, len));
1279 * EFAULT is a non-fatal error that we can get, for example,
1280 * if the segment is backed by a file but extends beyond its
1283 error = core_write(p, base, len, offset, UIO_USERSPACE);
1284 if (error == EFAULT) {
1285 log(LOG_WARNING, "Failed to fully fault in a core file segment "
1286 "at VA %p with size 0x%zx to be written at offset 0x%jx "
1287 "for process %s\n", base, len, offset, curproc->p_comm);
1290 * Write a "real" zero byte at the end of the target region
1291 * in the case this is the last segment.
1292 * The intermediate space will be implicitly zero-filled.
1294 error = core_write(p, zero_region, 1, offset + len - 1,
1301 * Drain into a core file.
1304 sbuf_drain_core_output(void *arg, const char *data, int len)
1306 struct coredump_params *p;
1309 p = (struct coredump_params *)arg;
1312 * Some kern_proc out routines that print to this sbuf may
1313 * call us with the process lock held. Draining with the
1314 * non-sleepable lock held is unsafe. The lock is needed for
1315 * those routines when dumping a live process. In our case we
1316 * can safely release the lock before draining and acquire
1319 locked = PROC_LOCKED(p->td->td_proc);
1321 PROC_UNLOCK(p->td->td_proc);
1324 error = gzio_write(p->gzs, __DECONST(char *, data), len);
1327 error = core_write(p, __DECONST(void *, data), len, p->offset,
1330 PROC_LOCK(p->td->td_proc);
1338 * Drain into a counter.
1341 sbuf_drain_count(void *arg, const char *data __unused, int len)
1345 sizep = (size_t *)arg;
1351 __elfN(coredump)(struct thread *td, struct vnode *vp, off_t limit, int flags)
1353 struct ucred *cred = td->td_ucred;
1355 struct sseg_closure seginfo;
1356 struct note_info_list notelst;
1357 struct coredump_params params;
1358 struct note_info *ninfo;
1360 size_t hdrsize, notesz, coresize;
1364 compress = (flags & IMGACT_CORE_COMPRESS) != 0;
1368 TAILQ_INIT(¬elst);
1370 /* Size the program segments. */
1373 each_writable_segment(td, cb_size_segment, &seginfo);
1376 * Collect info about the core file header area.
1378 hdrsize = sizeof(Elf_Ehdr) + sizeof(Elf_Phdr) * (1 + seginfo.count);
1379 __elfN(prepare_notes)(td, ¬elst, ¬esz);
1380 coresize = round_page(hdrsize + notesz) + seginfo.size;
1382 /* Set up core dump parameters. */
1384 params.active_cred = cred;
1385 params.file_cred = NOCRED;
1392 PROC_LOCK(td->td_proc);
1393 error = racct_add(td->td_proc, RACCT_CORE, coresize);
1394 PROC_UNLOCK(td->td_proc);
1401 if (coresize >= limit) {
1407 /* Create a compression stream if necessary. */
1409 params.gzs = gzio_init(core_gz_write, GZIO_DEFLATE,
1410 CORE_BUF_SIZE, compress_user_cores_gzlevel, ¶ms);
1411 if (params.gzs == NULL) {
1415 tmpbuf = malloc(CORE_BUF_SIZE, M_TEMP, M_WAITOK | M_ZERO);
1420 * Allocate memory for building the header, fill it up,
1421 * and write it out following the notes.
1423 hdr = malloc(hdrsize, M_TEMP, M_WAITOK);
1424 error = __elfN(corehdr)(¶ms, seginfo.count, hdr, hdrsize, ¬elst,
1427 /* Write the contents of all of the writable segments. */
1433 php = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr)) + 1;
1434 offset = round_page(hdrsize + notesz);
1435 for (i = 0; i < seginfo.count; i++) {
1436 error = core_output((caddr_t)(uintptr_t)php->p_vaddr,
1437 php->p_filesz, offset, ¶ms, tmpbuf);
1440 offset += php->p_filesz;
1444 if (error == 0 && compress)
1445 error = gzio_flush(params.gzs);
1450 "Failed to write core file for process %s (error %d)\n",
1451 curproc->p_comm, error);
1457 free(tmpbuf, M_TEMP);
1458 if (params.gzs != NULL)
1459 gzio_fini(params.gzs);
1462 while ((ninfo = TAILQ_FIRST(¬elst)) != NULL) {
1463 TAILQ_REMOVE(¬elst, ninfo, link);
1464 free(ninfo, M_TEMP);
1473 * A callback for each_writable_segment() to write out the segment's
1474 * program header entry.
1477 cb_put_phdr(entry, closure)
1478 vm_map_entry_t entry;
1481 struct phdr_closure *phc = (struct phdr_closure *)closure;
1482 Elf_Phdr *phdr = phc->phdr;
1484 phc->offset = round_page(phc->offset);
1486 phdr->p_type = PT_LOAD;
1487 phdr->p_offset = phc->offset;
1488 phdr->p_vaddr = entry->start;
1490 phdr->p_filesz = phdr->p_memsz = entry->end - entry->start;
1491 phdr->p_align = PAGE_SIZE;
1492 phdr->p_flags = __elfN(untrans_prot)(entry->protection);
1494 phc->offset += phdr->p_filesz;
1499 * A callback for each_writable_segment() to gather information about
1500 * the number of segments and their total size.
1503 cb_size_segment(entry, closure)
1504 vm_map_entry_t entry;
1507 struct sseg_closure *ssc = (struct sseg_closure *)closure;
1510 ssc->size += entry->end - entry->start;
1514 * For each writable segment in the process's memory map, call the given
1515 * function with a pointer to the map entry and some arbitrary
1516 * caller-supplied data.
1519 each_writable_segment(td, func, closure)
1521 segment_callback func;
1524 struct proc *p = td->td_proc;
1525 vm_map_t map = &p->p_vmspace->vm_map;
1526 vm_map_entry_t entry;
1527 vm_object_t backing_object, object;
1528 boolean_t ignore_entry;
1530 vm_map_lock_read(map);
1531 for (entry = map->header.next; entry != &map->header;
1532 entry = entry->next) {
1534 * Don't dump inaccessible mappings, deal with legacy
1537 * Note that read-only segments related to the elf binary
1538 * are marked MAP_ENTRY_NOCOREDUMP now so we no longer
1539 * need to arbitrarily ignore such segments.
1541 if (elf_legacy_coredump) {
1542 if ((entry->protection & VM_PROT_RW) != VM_PROT_RW)
1545 if ((entry->protection & VM_PROT_ALL) == 0)
1550 * Dont include memory segment in the coredump if
1551 * MAP_NOCORE is set in mmap(2) or MADV_NOCORE in
1552 * madvise(2). Do not dump submaps (i.e. parts of the
1555 if (entry->eflags & (MAP_ENTRY_NOCOREDUMP|MAP_ENTRY_IS_SUB_MAP))
1558 if ((object = entry->object.vm_object) == NULL)
1561 /* Ignore memory-mapped devices and such things. */
1562 VM_OBJECT_RLOCK(object);
1563 while ((backing_object = object->backing_object) != NULL) {
1564 VM_OBJECT_RLOCK(backing_object);
1565 VM_OBJECT_RUNLOCK(object);
1566 object = backing_object;
1568 ignore_entry = object->type != OBJT_DEFAULT &&
1569 object->type != OBJT_SWAP && object->type != OBJT_VNODE &&
1570 object->type != OBJT_PHYS;
1571 VM_OBJECT_RUNLOCK(object);
1575 (*func)(entry, closure);
1577 vm_map_unlock_read(map);
1581 * Write the core file header to the file, including padding up to
1582 * the page boundary.
1585 __elfN(corehdr)(struct coredump_params *p, int numsegs, void *hdr,
1586 size_t hdrsize, struct note_info_list *notelst, size_t notesz)
1588 struct note_info *ninfo;
1592 /* Fill in the header. */
1593 bzero(hdr, hdrsize);
1594 __elfN(puthdr)(p->td, hdr, hdrsize, numsegs, notesz);
1596 sb = sbuf_new(NULL, NULL, CORE_BUF_SIZE, SBUF_FIXEDLEN);
1597 sbuf_set_drain(sb, sbuf_drain_core_output, p);
1598 sbuf_start_section(sb, NULL);
1599 sbuf_bcat(sb, hdr, hdrsize);
1600 TAILQ_FOREACH(ninfo, notelst, link)
1601 __elfN(putnote)(ninfo, sb);
1602 /* Align up to a page boundary for the program segments. */
1603 sbuf_end_section(sb, -1, PAGE_SIZE, 0);
1604 error = sbuf_finish(sb);
1611 __elfN(prepare_notes)(struct thread *td, struct note_info_list *list,
1621 size += register_note(list, NT_PRPSINFO, __elfN(note_prpsinfo), p);
1624 * To have the debugger select the right thread (LWP) as the initial
1625 * thread, we dump the state of the thread passed to us in td first.
1626 * This is the thread that causes the core dump and thus likely to
1627 * be the right thread one wants to have selected in the debugger.
1630 while (thr != NULL) {
1631 size += register_note(list, NT_PRSTATUS,
1632 __elfN(note_prstatus), thr);
1633 size += register_note(list, NT_FPREGSET,
1634 __elfN(note_fpregset), thr);
1635 size += register_note(list, NT_THRMISC,
1636 __elfN(note_thrmisc), thr);
1637 size += register_note(list, -1,
1638 __elfN(note_threadmd), thr);
1640 thr = (thr == td) ? TAILQ_FIRST(&p->p_threads) :
1641 TAILQ_NEXT(thr, td_plist);
1643 thr = TAILQ_NEXT(thr, td_plist);
1646 size += register_note(list, NT_PROCSTAT_PROC,
1647 __elfN(note_procstat_proc), p);
1648 size += register_note(list, NT_PROCSTAT_FILES,
1649 note_procstat_files, p);
1650 size += register_note(list, NT_PROCSTAT_VMMAP,
1651 note_procstat_vmmap, p);
1652 size += register_note(list, NT_PROCSTAT_GROUPS,
1653 note_procstat_groups, p);
1654 size += register_note(list, NT_PROCSTAT_UMASK,
1655 note_procstat_umask, p);
1656 size += register_note(list, NT_PROCSTAT_RLIMIT,
1657 note_procstat_rlimit, p);
1658 size += register_note(list, NT_PROCSTAT_OSREL,
1659 note_procstat_osrel, p);
1660 size += register_note(list, NT_PROCSTAT_PSSTRINGS,
1661 __elfN(note_procstat_psstrings), p);
1662 size += register_note(list, NT_PROCSTAT_AUXV,
1663 __elfN(note_procstat_auxv), p);
1669 __elfN(puthdr)(struct thread *td, void *hdr, size_t hdrsize, int numsegs,
1674 struct phdr_closure phc;
1676 ehdr = (Elf_Ehdr *)hdr;
1677 phdr = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr));
1679 ehdr->e_ident[EI_MAG0] = ELFMAG0;
1680 ehdr->e_ident[EI_MAG1] = ELFMAG1;
1681 ehdr->e_ident[EI_MAG2] = ELFMAG2;
1682 ehdr->e_ident[EI_MAG3] = ELFMAG3;
1683 ehdr->e_ident[EI_CLASS] = ELF_CLASS;
1684 ehdr->e_ident[EI_DATA] = ELF_DATA;
1685 ehdr->e_ident[EI_VERSION] = EV_CURRENT;
1686 ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
1687 ehdr->e_ident[EI_ABIVERSION] = 0;
1688 ehdr->e_ident[EI_PAD] = 0;
1689 ehdr->e_type = ET_CORE;
1690 ehdr->e_machine = td->td_proc->p_elf_machine;
1691 ehdr->e_version = EV_CURRENT;
1693 ehdr->e_phoff = sizeof(Elf_Ehdr);
1694 ehdr->e_flags = td->td_proc->p_elf_flags;
1695 ehdr->e_ehsize = sizeof(Elf_Ehdr);
1696 ehdr->e_phentsize = sizeof(Elf_Phdr);
1697 ehdr->e_phnum = numsegs + 1;
1698 ehdr->e_shentsize = sizeof(Elf_Shdr);
1700 ehdr->e_shstrndx = SHN_UNDEF;
1703 * Fill in the program header entries.
1706 /* The note segement. */
1707 phdr->p_type = PT_NOTE;
1708 phdr->p_offset = hdrsize;
1711 phdr->p_filesz = notesz;
1713 phdr->p_flags = PF_R;
1714 phdr->p_align = ELF_NOTE_ROUNDSIZE;
1717 /* All the writable segments from the program. */
1719 phc.offset = round_page(hdrsize + notesz);
1720 each_writable_segment(td, cb_put_phdr, &phc);
1724 register_note(struct note_info_list *list, int type, outfunc_t out, void *arg)
1726 struct note_info *ninfo;
1727 size_t size, notesize;
1730 out(arg, NULL, &size);
1731 ninfo = malloc(sizeof(*ninfo), M_TEMP, M_ZERO | M_WAITOK);
1733 ninfo->outfunc = out;
1734 ninfo->outarg = arg;
1735 ninfo->outsize = size;
1736 TAILQ_INSERT_TAIL(list, ninfo, link);
1741 notesize = sizeof(Elf_Note) + /* note header */
1742 roundup2(sizeof(FREEBSD_ABI_VENDOR), ELF_NOTE_ROUNDSIZE) +
1744 roundup2(size, ELF_NOTE_ROUNDSIZE); /* note description */
1750 append_note_data(const void *src, void *dst, size_t len)
1754 padded_len = roundup2(len, ELF_NOTE_ROUNDSIZE);
1756 bcopy(src, dst, len);
1757 bzero((char *)dst + len, padded_len - len);
1759 return (padded_len);
1763 __elfN(populate_note)(int type, void *src, void *dst, size_t size, void **descp)
1771 note = (Elf_Note *)buf;
1772 note->n_namesz = sizeof(FREEBSD_ABI_VENDOR);
1773 note->n_descsz = size;
1774 note->n_type = type;
1775 buf += sizeof(*note);
1776 buf += append_note_data(FREEBSD_ABI_VENDOR, buf,
1777 sizeof(FREEBSD_ABI_VENDOR));
1778 append_note_data(src, buf, size);
1783 notesize = sizeof(Elf_Note) + /* note header */
1784 roundup2(sizeof(FREEBSD_ABI_VENDOR), ELF_NOTE_ROUNDSIZE) +
1786 roundup2(size, ELF_NOTE_ROUNDSIZE); /* note description */
1792 __elfN(putnote)(struct note_info *ninfo, struct sbuf *sb)
1795 ssize_t old_len, sect_len;
1796 size_t new_len, descsz, i;
1798 if (ninfo->type == -1) {
1799 ninfo->outfunc(ninfo->outarg, sb, &ninfo->outsize);
1803 note.n_namesz = sizeof(FREEBSD_ABI_VENDOR);
1804 note.n_descsz = ninfo->outsize;
1805 note.n_type = ninfo->type;
1807 sbuf_bcat(sb, ¬e, sizeof(note));
1808 sbuf_start_section(sb, &old_len);
1809 sbuf_bcat(sb, FREEBSD_ABI_VENDOR, sizeof(FREEBSD_ABI_VENDOR));
1810 sbuf_end_section(sb, old_len, ELF_NOTE_ROUNDSIZE, 0);
1811 if (note.n_descsz == 0)
1813 sbuf_start_section(sb, &old_len);
1814 ninfo->outfunc(ninfo->outarg, sb, &ninfo->outsize);
1815 sect_len = sbuf_end_section(sb, old_len, ELF_NOTE_ROUNDSIZE, 0);
1819 new_len = (size_t)sect_len;
1820 descsz = roundup(note.n_descsz, ELF_NOTE_ROUNDSIZE);
1821 if (new_len < descsz) {
1823 * It is expected that individual note emitters will correctly
1824 * predict their expected output size and fill up to that size
1825 * themselves, padding in a format-specific way if needed.
1826 * However, in case they don't, just do it here with zeros.
1828 for (i = 0; i < descsz - new_len; i++)
1830 } else if (new_len > descsz) {
1832 * We can't always truncate sb -- we may have drained some
1835 KASSERT(new_len == descsz, ("%s: Note type %u changed as we "
1836 "read it (%zu > %zu). Since it is longer than "
1837 "expected, this coredump's notes are corrupt. THIS "
1838 "IS A BUG in the note_procstat routine for type %u.\n",
1839 __func__, (unsigned)note.n_type, new_len, descsz,
1840 (unsigned)note.n_type));
1845 * Miscellaneous note out functions.
1848 #if defined(COMPAT_FREEBSD32) && __ELF_WORD_SIZE == 32
1849 #include <compat/freebsd32/freebsd32.h>
1851 typedef struct prstatus32 elf_prstatus_t;
1852 typedef struct prpsinfo32 elf_prpsinfo_t;
1853 typedef struct fpreg32 elf_prfpregset_t;
1854 typedef struct fpreg32 elf_fpregset_t;
1855 typedef struct reg32 elf_gregset_t;
1856 typedef struct thrmisc32 elf_thrmisc_t;
1857 #define ELF_KERN_PROC_MASK KERN_PROC_MASK32
1858 typedef struct kinfo_proc32 elf_kinfo_proc_t;
1859 typedef uint32_t elf_ps_strings_t;
1861 typedef prstatus_t elf_prstatus_t;
1862 typedef prpsinfo_t elf_prpsinfo_t;
1863 typedef prfpregset_t elf_prfpregset_t;
1864 typedef prfpregset_t elf_fpregset_t;
1865 typedef gregset_t elf_gregset_t;
1866 typedef thrmisc_t elf_thrmisc_t;
1867 #define ELF_KERN_PROC_MASK 0
1868 typedef struct kinfo_proc elf_kinfo_proc_t;
1869 typedef vm_offset_t elf_ps_strings_t;
1873 __elfN(note_prpsinfo)(void *arg, struct sbuf *sb, size_t *sizep)
1879 elf_prpsinfo_t *psinfo;
1882 p = (struct proc *)arg;
1884 KASSERT(*sizep == sizeof(*psinfo), ("invalid size"));
1885 psinfo = malloc(sizeof(*psinfo), M_TEMP, M_ZERO | M_WAITOK);
1886 psinfo->pr_version = PRPSINFO_VERSION;
1887 psinfo->pr_psinfosz = sizeof(elf_prpsinfo_t);
1888 strlcpy(psinfo->pr_fname, p->p_comm, sizeof(psinfo->pr_fname));
1890 if (p->p_args != NULL) {
1891 len = sizeof(psinfo->pr_psargs) - 1;
1892 if (len > p->p_args->ar_length)
1893 len = p->p_args->ar_length;
1894 memcpy(psinfo->pr_psargs, p->p_args->ar_args, len);
1900 sbuf_new(&sbarg, psinfo->pr_psargs,
1901 sizeof(psinfo->pr_psargs), SBUF_FIXEDLEN);
1902 error = proc_getargv(curthread, p, &sbarg);
1904 if (sbuf_finish(&sbarg) == 0)
1905 len = sbuf_len(&sbarg) - 1;
1907 len = sizeof(psinfo->pr_psargs) - 1;
1908 sbuf_delete(&sbarg);
1910 if (error || len == 0)
1911 strlcpy(psinfo->pr_psargs, p->p_comm,
1912 sizeof(psinfo->pr_psargs));
1914 KASSERT(len < sizeof(psinfo->pr_psargs),
1915 ("len is too long: %zu vs %zu", len,
1916 sizeof(psinfo->pr_psargs)));
1917 cp = psinfo->pr_psargs;
1920 cp = memchr(cp, '\0', end - cp);
1926 psinfo->pr_pid = p->p_pid;
1927 sbuf_bcat(sb, psinfo, sizeof(*psinfo));
1928 free(psinfo, M_TEMP);
1930 *sizep = sizeof(*psinfo);
1934 __elfN(note_prstatus)(void *arg, struct sbuf *sb, size_t *sizep)
1937 elf_prstatus_t *status;
1939 td = (struct thread *)arg;
1941 KASSERT(*sizep == sizeof(*status), ("invalid size"));
1942 status = malloc(sizeof(*status), M_TEMP, M_ZERO | M_WAITOK);
1943 status->pr_version = PRSTATUS_VERSION;
1944 status->pr_statussz = sizeof(elf_prstatus_t);
1945 status->pr_gregsetsz = sizeof(elf_gregset_t);
1946 status->pr_fpregsetsz = sizeof(elf_fpregset_t);
1947 status->pr_osreldate = osreldate;
1948 status->pr_cursig = td->td_proc->p_sig;
1949 status->pr_pid = td->td_tid;
1950 #if defined(COMPAT_FREEBSD32) && __ELF_WORD_SIZE == 32
1951 fill_regs32(td, &status->pr_reg);
1953 fill_regs(td, &status->pr_reg);
1955 sbuf_bcat(sb, status, sizeof(*status));
1956 free(status, M_TEMP);
1958 *sizep = sizeof(*status);
1962 __elfN(note_fpregset)(void *arg, struct sbuf *sb, size_t *sizep)
1965 elf_prfpregset_t *fpregset;
1967 td = (struct thread *)arg;
1969 KASSERT(*sizep == sizeof(*fpregset), ("invalid size"));
1970 fpregset = malloc(sizeof(*fpregset), M_TEMP, M_ZERO | M_WAITOK);
1971 #if defined(COMPAT_FREEBSD32) && __ELF_WORD_SIZE == 32
1972 fill_fpregs32(td, fpregset);
1974 fill_fpregs(td, fpregset);
1976 sbuf_bcat(sb, fpregset, sizeof(*fpregset));
1977 free(fpregset, M_TEMP);
1979 *sizep = sizeof(*fpregset);
1983 __elfN(note_thrmisc)(void *arg, struct sbuf *sb, size_t *sizep)
1986 elf_thrmisc_t thrmisc;
1988 td = (struct thread *)arg;
1990 KASSERT(*sizep == sizeof(thrmisc), ("invalid size"));
1991 bzero(&thrmisc._pad, sizeof(thrmisc._pad));
1992 strcpy(thrmisc.pr_tname, td->td_name);
1993 sbuf_bcat(sb, &thrmisc, sizeof(thrmisc));
1995 *sizep = sizeof(thrmisc);
1999 * Allow for MD specific notes, as well as any MD
2000 * specific preparations for writing MI notes.
2003 __elfN(note_threadmd)(void *arg, struct sbuf *sb, size_t *sizep)
2009 td = (struct thread *)arg;
2011 if (size != 0 && sb != NULL)
2012 buf = malloc(size, M_TEMP, M_ZERO | M_WAITOK);
2016 __elfN(dump_thread)(td, buf, &size);
2017 KASSERT(sb == NULL || *sizep == size, ("invalid size"));
2018 if (size != 0 && sb != NULL)
2019 sbuf_bcat(sb, buf, size);
2024 #ifdef KINFO_PROC_SIZE
2025 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
2029 __elfN(note_procstat_proc)(void *arg, struct sbuf *sb, size_t *sizep)
2035 p = (struct proc *)arg;
2036 size = sizeof(structsize) + p->p_numthreads *
2037 sizeof(elf_kinfo_proc_t);
2040 KASSERT(*sizep == size, ("invalid size"));
2041 structsize = sizeof(elf_kinfo_proc_t);
2042 sbuf_bcat(sb, &structsize, sizeof(structsize));
2043 sx_slock(&proctree_lock);
2045 kern_proc_out(p, sb, ELF_KERN_PROC_MASK);
2046 sx_sunlock(&proctree_lock);
2051 #ifdef KINFO_FILE_SIZE
2052 CTASSERT(sizeof(struct kinfo_file) == KINFO_FILE_SIZE);
2056 note_procstat_files(void *arg, struct sbuf *sb, size_t *sizep)
2059 size_t size, sect_sz, i;
2060 ssize_t start_len, sect_len;
2061 int structsize, filedesc_flags;
2063 if (coredump_pack_fileinfo)
2064 filedesc_flags = KERN_FILEDESC_PACK_KINFO;
2068 p = (struct proc *)arg;
2069 structsize = sizeof(struct kinfo_file);
2072 sb = sbuf_new(NULL, NULL, 128, SBUF_FIXEDLEN);
2073 sbuf_set_drain(sb, sbuf_drain_count, &size);
2074 sbuf_bcat(sb, &structsize, sizeof(structsize));
2076 kern_proc_filedesc_out(p, sb, -1, filedesc_flags);
2081 sbuf_start_section(sb, &start_len);
2083 sbuf_bcat(sb, &structsize, sizeof(structsize));
2085 kern_proc_filedesc_out(p, sb, *sizep - sizeof(structsize),
2088 sect_len = sbuf_end_section(sb, start_len, 0, 0);
2093 KASSERT(sect_sz <= *sizep,
2094 ("kern_proc_filedesc_out did not respect maxlen; "
2095 "requested %zu, got %zu", *sizep - sizeof(structsize),
2096 sect_sz - sizeof(structsize)));
2098 for (i = 0; i < *sizep - sect_sz && sb->s_error == 0; i++)
2103 #ifdef KINFO_VMENTRY_SIZE
2104 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
2108 note_procstat_vmmap(void *arg, struct sbuf *sb, size_t *sizep)
2112 int structsize, vmmap_flags;
2114 if (coredump_pack_vmmapinfo)
2115 vmmap_flags = KERN_VMMAP_PACK_KINFO;
2119 p = (struct proc *)arg;
2120 structsize = sizeof(struct kinfo_vmentry);
2123 sb = sbuf_new(NULL, NULL, 128, SBUF_FIXEDLEN);
2124 sbuf_set_drain(sb, sbuf_drain_count, &size);
2125 sbuf_bcat(sb, &structsize, sizeof(structsize));
2127 kern_proc_vmmap_out(p, sb, -1, vmmap_flags);
2132 sbuf_bcat(sb, &structsize, sizeof(structsize));
2134 kern_proc_vmmap_out(p, sb, *sizep - sizeof(structsize),
2140 note_procstat_groups(void *arg, struct sbuf *sb, size_t *sizep)
2146 p = (struct proc *)arg;
2147 size = sizeof(structsize) + p->p_ucred->cr_ngroups * sizeof(gid_t);
2149 KASSERT(*sizep == size, ("invalid size"));
2150 structsize = sizeof(gid_t);
2151 sbuf_bcat(sb, &structsize, sizeof(structsize));
2152 sbuf_bcat(sb, p->p_ucred->cr_groups, p->p_ucred->cr_ngroups *
2159 note_procstat_umask(void *arg, struct sbuf *sb, size_t *sizep)
2165 p = (struct proc *)arg;
2166 size = sizeof(structsize) + sizeof(p->p_fd->fd_cmask);
2168 KASSERT(*sizep == size, ("invalid size"));
2169 structsize = sizeof(p->p_fd->fd_cmask);
2170 sbuf_bcat(sb, &structsize, sizeof(structsize));
2171 sbuf_bcat(sb, &p->p_fd->fd_cmask, sizeof(p->p_fd->fd_cmask));
2177 note_procstat_rlimit(void *arg, struct sbuf *sb, size_t *sizep)
2180 struct rlimit rlim[RLIM_NLIMITS];
2184 p = (struct proc *)arg;
2185 size = sizeof(structsize) + sizeof(rlim);
2187 KASSERT(*sizep == size, ("invalid size"));
2188 structsize = sizeof(rlim);
2189 sbuf_bcat(sb, &structsize, sizeof(structsize));
2191 for (i = 0; i < RLIM_NLIMITS; i++)
2192 lim_rlimit_proc(p, i, &rlim[i]);
2194 sbuf_bcat(sb, rlim, sizeof(rlim));
2200 note_procstat_osrel(void *arg, struct sbuf *sb, size_t *sizep)
2206 p = (struct proc *)arg;
2207 size = sizeof(structsize) + sizeof(p->p_osrel);
2209 KASSERT(*sizep == size, ("invalid size"));
2210 structsize = sizeof(p->p_osrel);
2211 sbuf_bcat(sb, &structsize, sizeof(structsize));
2212 sbuf_bcat(sb, &p->p_osrel, sizeof(p->p_osrel));
2218 __elfN(note_procstat_psstrings)(void *arg, struct sbuf *sb, size_t *sizep)
2221 elf_ps_strings_t ps_strings;
2225 p = (struct proc *)arg;
2226 size = sizeof(structsize) + sizeof(ps_strings);
2228 KASSERT(*sizep == size, ("invalid size"));
2229 structsize = sizeof(ps_strings);
2230 #if defined(COMPAT_FREEBSD32) && __ELF_WORD_SIZE == 32
2231 ps_strings = PTROUT(p->p_sysent->sv_psstrings);
2233 ps_strings = p->p_sysent->sv_psstrings;
2235 sbuf_bcat(sb, &structsize, sizeof(structsize));
2236 sbuf_bcat(sb, &ps_strings, sizeof(ps_strings));
2242 __elfN(note_procstat_auxv)(void *arg, struct sbuf *sb, size_t *sizep)
2248 p = (struct proc *)arg;
2251 sb = sbuf_new(NULL, NULL, 128, SBUF_FIXEDLEN);
2252 sbuf_set_drain(sb, sbuf_drain_count, &size);
2253 sbuf_bcat(sb, &structsize, sizeof(structsize));
2255 proc_getauxv(curthread, p, sb);
2261 structsize = sizeof(Elf_Auxinfo);
2262 sbuf_bcat(sb, &structsize, sizeof(structsize));
2264 proc_getauxv(curthread, p, sb);
2270 __elfN(parse_notes)(struct image_params *imgp, Elf_Brandnote *checknote,
2271 int32_t *osrel, const Elf_Phdr *pnote)
2273 const Elf_Note *note, *note0, *note_end;
2274 const char *note_name;
2279 /* We need some limit, might as well use PAGE_SIZE. */
2280 if (pnote == NULL || pnote->p_filesz > PAGE_SIZE)
2282 ASSERT_VOP_LOCKED(imgp->vp, "parse_notes");
2283 if (pnote->p_offset > PAGE_SIZE ||
2284 pnote->p_filesz > PAGE_SIZE - pnote->p_offset) {
2285 VOP_UNLOCK(imgp->vp, 0);
2286 buf = malloc(pnote->p_filesz, M_TEMP, M_WAITOK);
2287 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
2288 error = vn_rdwr(UIO_READ, imgp->vp, buf, pnote->p_filesz,
2289 pnote->p_offset, UIO_SYSSPACE, IO_NODELOCKED,
2290 curthread->td_ucred, NOCRED, NULL, curthread);
2292 uprintf("i/o error PT_NOTE\n");
2296 note = note0 = (const Elf_Note *)buf;
2297 note_end = (const Elf_Note *)(buf + pnote->p_filesz);
2299 note = note0 = (const Elf_Note *)(imgp->image_header +
2301 note_end = (const Elf_Note *)(imgp->image_header +
2302 pnote->p_offset + pnote->p_filesz);
2305 for (i = 0; i < 100 && note >= note0 && note < note_end; i++) {
2306 if (!aligned(note, Elf32_Addr) || (const char *)note_end -
2307 (const char *)note < sizeof(Elf_Note)) {
2311 if (note->n_namesz != checknote->hdr.n_namesz ||
2312 note->n_descsz != checknote->hdr.n_descsz ||
2313 note->n_type != checknote->hdr.n_type)
2315 note_name = (const char *)(note + 1);
2316 if (note_name + checknote->hdr.n_namesz >=
2317 (const char *)note_end || strncmp(checknote->vendor,
2318 note_name, checknote->hdr.n_namesz) != 0)
2322 * Fetch the osreldate for binary
2323 * from the ELF OSABI-note if necessary.
2325 if ((checknote->flags & BN_TRANSLATE_OSREL) != 0 &&
2326 checknote->trans_osrel != NULL) {
2327 res = checknote->trans_osrel(note, osrel);
2333 note = (const Elf_Note *)((const char *)(note + 1) +
2334 roundup2(note->n_namesz, ELF_NOTE_ROUNDSIZE) +
2335 roundup2(note->n_descsz, ELF_NOTE_ROUNDSIZE));
2344 * Try to find the appropriate ABI-note section for checknote,
2345 * fetch the osreldate for binary from the ELF OSABI-note. Only the
2346 * first page of the image is searched, the same as for headers.
2349 __elfN(check_note)(struct image_params *imgp, Elf_Brandnote *checknote,
2352 const Elf_Phdr *phdr;
2353 const Elf_Ehdr *hdr;
2356 hdr = (const Elf_Ehdr *)imgp->image_header;
2357 phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff);
2359 for (i = 0; i < hdr->e_phnum; i++) {
2360 if (phdr[i].p_type == PT_NOTE &&
2361 __elfN(parse_notes)(imgp, checknote, osrel, &phdr[i]))
2369 * Tell kern_execve.c about it, with a little help from the linker.
2371 static struct execsw __elfN(execsw) = {
2372 __CONCAT(exec_, __elfN(imgact)),
2373 __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE))
2375 EXEC_SET(__CONCAT(elf, __ELF_WORD_SIZE), __elfN(execsw));
2378 __elfN(trans_prot)(Elf_Word flags)
2384 prot |= VM_PROT_EXECUTE;
2386 prot |= VM_PROT_WRITE;
2388 prot |= VM_PROT_READ;
2389 #if __ELF_WORD_SIZE == 32
2390 #if defined(__amd64__)
2391 if (i386_read_exec && (flags & PF_R))
2392 prot |= VM_PROT_EXECUTE;
2399 __elfN(untrans_prot)(vm_prot_t prot)
2404 if (prot & VM_PROT_EXECUTE)
2406 if (prot & VM_PROT_READ)
2408 if (prot & VM_PROT_WRITE)