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/capability.h>
41 #include <sys/fcntl.h>
42 #include <sys/imgact.h>
43 #include <sys/imgact_elf.h>
44 #include <sys/kernel.h>
46 #include <sys/malloc.h>
47 #include <sys/mount.h>
48 #include <sys/mutex.h>
50 #include <sys/namei.h>
51 #include <sys/pioctl.h>
53 #include <sys/procfs.h>
54 #include <sys/racct.h>
55 #include <sys/resourcevar.h>
56 #include <sys/sf_buf.h>
58 #include <sys/systm.h>
59 #include <sys/signalvar.h>
62 #include <sys/syscall.h>
63 #include <sys/sysctl.h>
64 #include <sys/sysent.h>
65 #include <sys/vnode.h>
66 #include <sys/syslog.h>
67 #include <sys/eventhandler.h>
72 #include <vm/vm_kern.h>
73 #include <vm/vm_param.h>
75 #include <vm/vm_map.h>
76 #include <vm/vm_object.h>
77 #include <vm/vm_extern.h>
79 #include <machine/elf.h>
80 #include <machine/md_var.h>
82 #define OLD_EI_BRAND 8
84 static int __elfN(check_header)(const Elf_Ehdr *hdr);
85 static Elf_Brandinfo *__elfN(get_brandinfo)(struct image_params *imgp,
86 const char *interp, int32_t *osrel);
87 static int __elfN(load_file)(struct proc *p, const char *file, u_long *addr,
88 u_long *entry, size_t pagesize);
89 static int __elfN(load_section)(struct vmspace *vmspace, vm_object_t object,
90 vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz,
91 vm_prot_t prot, size_t pagesize);
92 static int __CONCAT(exec_, __elfN(imgact))(struct image_params *imgp);
93 static boolean_t __elfN(freebsd_trans_osrel)(const Elf_Note *note,
95 static boolean_t kfreebsd_trans_osrel(const Elf_Note *note, int32_t *osrel);
96 static boolean_t __elfN(check_note)(struct image_params *imgp,
97 Elf_Brandnote *checknote, int32_t *osrel);
98 static vm_prot_t __elfN(trans_prot)(Elf_Word);
99 static Elf_Word __elfN(untrans_prot)(vm_prot_t);
101 SYSCTL_NODE(_kern, OID_AUTO, __CONCAT(elf, __ELF_WORD_SIZE), CTLFLAG_RW, 0,
104 #ifdef COMPRESS_USER_CORES
105 static int compress_core(gzFile, char *, char *, unsigned int,
107 #define CORE_BUF_SIZE (16 * 1024)
110 int __elfN(fallback_brand) = -1;
111 SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO,
112 fallback_brand, CTLFLAG_RW, &__elfN(fallback_brand), 0,
113 __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) " brand of last resort");
114 TUNABLE_INT("kern.elf" __XSTRING(__ELF_WORD_SIZE) ".fallback_brand",
115 &__elfN(fallback_brand));
117 static int elf_legacy_coredump = 0;
118 SYSCTL_INT(_debug, OID_AUTO, __elfN(legacy_coredump), CTLFLAG_RW,
119 &elf_legacy_coredump, 0, "");
121 int __elfN(nxstack) =
122 #if defined(__amd64__) || defined(__powerpc64__) /* both 64 and 32 bit */
127 SYSCTL_INT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO,
128 nxstack, CTLFLAG_RW, &__elfN(nxstack), 0,
129 __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": enable non-executable stack");
131 #if __ELF_WORD_SIZE == 32
132 #if defined(__amd64__) || defined(__ia64__)
133 int i386_read_exec = 0;
134 SYSCTL_INT(_kern_elf32, OID_AUTO, read_exec, CTLFLAG_RW, &i386_read_exec, 0,
135 "enable execution from readable segments");
139 static Elf_Brandinfo *elf_brand_list[MAX_BRANDS];
141 #define trunc_page_ps(va, ps) ((va) & ~(ps - 1))
142 #define round_page_ps(va, ps) (((va) + (ps - 1)) & ~(ps - 1))
143 #define aligned(a, t) (trunc_page_ps((u_long)(a), sizeof(t)) == (u_long)(a))
145 static const char FREEBSD_ABI_VENDOR[] = "FreeBSD";
147 Elf_Brandnote __elfN(freebsd_brandnote) = {
148 .hdr.n_namesz = sizeof(FREEBSD_ABI_VENDOR),
149 .hdr.n_descsz = sizeof(int32_t),
151 .vendor = FREEBSD_ABI_VENDOR,
152 .flags = BN_TRANSLATE_OSREL,
153 .trans_osrel = __elfN(freebsd_trans_osrel)
157 __elfN(freebsd_trans_osrel)(const Elf_Note *note, int32_t *osrel)
161 p = (uintptr_t)(note + 1);
162 p += roundup2(note->n_namesz, sizeof(Elf32_Addr));
163 *osrel = *(const int32_t *)(p);
168 static const char GNU_ABI_VENDOR[] = "GNU";
169 static int GNU_KFREEBSD_ABI_DESC = 3;
171 Elf_Brandnote __elfN(kfreebsd_brandnote) = {
172 .hdr.n_namesz = sizeof(GNU_ABI_VENDOR),
173 .hdr.n_descsz = 16, /* XXX at least 16 */
175 .vendor = GNU_ABI_VENDOR,
176 .flags = BN_TRANSLATE_OSREL,
177 .trans_osrel = kfreebsd_trans_osrel
181 kfreebsd_trans_osrel(const Elf_Note *note, int32_t *osrel)
183 const Elf32_Word *desc;
186 p = (uintptr_t)(note + 1);
187 p += roundup2(note->n_namesz, sizeof(Elf32_Addr));
189 desc = (const Elf32_Word *)p;
190 if (desc[0] != GNU_KFREEBSD_ABI_DESC)
194 * Debian GNU/kFreeBSD embed the earliest compatible kernel version
195 * (__FreeBSD_version: <major><two digit minor>Rxx) in the LSB way.
197 *osrel = desc[1] * 100000 + desc[2] * 1000 + desc[3];
203 __elfN(insert_brand_entry)(Elf_Brandinfo *entry)
207 for (i = 0; i < MAX_BRANDS; i++) {
208 if (elf_brand_list[i] == NULL) {
209 elf_brand_list[i] = entry;
213 if (i == MAX_BRANDS) {
214 printf("WARNING: %s: could not insert brandinfo entry: %p\n",
222 __elfN(remove_brand_entry)(Elf_Brandinfo *entry)
226 for (i = 0; i < MAX_BRANDS; i++) {
227 if (elf_brand_list[i] == entry) {
228 elf_brand_list[i] = NULL;
238 __elfN(brand_inuse)(Elf_Brandinfo *entry)
243 sx_slock(&allproc_lock);
244 FOREACH_PROC_IN_SYSTEM(p) {
245 if (p->p_sysent == entry->sysvec) {
250 sx_sunlock(&allproc_lock);
255 static Elf_Brandinfo *
256 __elfN(get_brandinfo)(struct image_params *imgp, const char *interp,
259 const Elf_Ehdr *hdr = (const Elf_Ehdr *)imgp->image_header;
265 * We support four types of branding -- (1) the ELF EI_OSABI field
266 * that SCO added to the ELF spec, (2) FreeBSD 3.x's traditional string
267 * branding w/in the ELF header, (3) path of the `interp_path'
268 * field, and (4) the ".note.ABI-tag" ELF section.
271 /* Look for an ".note.ABI-tag" ELF section */
272 for (i = 0; i < MAX_BRANDS; i++) {
273 bi = elf_brand_list[i];
276 if (hdr->e_machine == bi->machine && (bi->flags &
277 (BI_BRAND_NOTE|BI_BRAND_NOTE_MANDATORY)) != 0) {
278 ret = __elfN(check_note)(imgp, bi->brand_note, osrel);
284 /* If the executable has a brand, search for it in the brand list. */
285 for (i = 0; i < MAX_BRANDS; i++) {
286 bi = elf_brand_list[i];
287 if (bi == NULL || bi->flags & BI_BRAND_NOTE_MANDATORY)
289 if (hdr->e_machine == bi->machine &&
290 (hdr->e_ident[EI_OSABI] == bi->brand ||
291 strncmp((const char *)&hdr->e_ident[OLD_EI_BRAND],
292 bi->compat_3_brand, strlen(bi->compat_3_brand)) == 0))
296 /* Lacking a known brand, search for a recognized interpreter. */
297 if (interp != NULL) {
298 for (i = 0; i < MAX_BRANDS; i++) {
299 bi = elf_brand_list[i];
300 if (bi == NULL || bi->flags & BI_BRAND_NOTE_MANDATORY)
302 if (hdr->e_machine == bi->machine &&
303 strcmp(interp, bi->interp_path) == 0)
308 /* Lacking a recognized interpreter, try the default brand */
309 for (i = 0; i < MAX_BRANDS; i++) {
310 bi = elf_brand_list[i];
311 if (bi == NULL || bi->flags & BI_BRAND_NOTE_MANDATORY)
313 if (hdr->e_machine == bi->machine &&
314 __elfN(fallback_brand) == bi->brand)
321 __elfN(check_header)(const Elf_Ehdr *hdr)
327 hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS ||
328 hdr->e_ident[EI_DATA] != ELF_TARG_DATA ||
329 hdr->e_ident[EI_VERSION] != EV_CURRENT ||
330 hdr->e_phentsize != sizeof(Elf_Phdr) ||
331 hdr->e_version != ELF_TARG_VER)
335 * Make sure we have at least one brand for this machine.
338 for (i = 0; i < MAX_BRANDS; i++) {
339 bi = elf_brand_list[i];
340 if (bi != NULL && bi->machine == hdr->e_machine)
350 __elfN(map_partial)(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
351 vm_offset_t start, vm_offset_t end, vm_prot_t prot)
358 * Create the page if it doesn't exist yet. Ignore errors.
361 vm_map_insert(map, NULL, 0, trunc_page(start), round_page(end),
362 VM_PROT_ALL, VM_PROT_ALL, 0);
366 * Find the page from the underlying object.
369 sf = vm_imgact_map_page(object, offset);
371 return (KERN_FAILURE);
372 off = offset - trunc_page(offset);
373 error = copyout((caddr_t)sf_buf_kva(sf) + off, (caddr_t)start,
375 vm_imgact_unmap_page(sf);
377 return (KERN_FAILURE);
381 return (KERN_SUCCESS);
385 __elfN(map_insert)(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
386 vm_offset_t start, vm_offset_t end, vm_prot_t prot, int cow)
393 if (start != trunc_page(start)) {
394 rv = __elfN(map_partial)(map, object, offset, start,
395 round_page(start), prot);
398 offset += round_page(start) - start;
399 start = round_page(start);
401 if (end != round_page(end)) {
402 rv = __elfN(map_partial)(map, object, offset +
403 trunc_page(end) - start, trunc_page(end), end, prot);
406 end = trunc_page(end);
409 if (offset & PAGE_MASK) {
411 * The mapping is not page aligned. This means we have
412 * to copy the data. Sigh.
414 rv = vm_map_find(map, NULL, 0, &start, end - start,
415 FALSE, prot | VM_PROT_WRITE, VM_PROT_ALL, 0);
419 return (KERN_SUCCESS);
420 for (; start < end; start += sz) {
421 sf = vm_imgact_map_page(object, offset);
423 return (KERN_FAILURE);
424 off = offset - trunc_page(offset);
426 if (sz > PAGE_SIZE - off)
427 sz = PAGE_SIZE - off;
428 error = copyout((caddr_t)sf_buf_kva(sf) + off,
430 vm_imgact_unmap_page(sf);
432 return (KERN_FAILURE);
438 vm_object_reference(object);
440 rv = vm_map_insert(map, object, offset, start, end,
441 prot, VM_PROT_ALL, cow);
443 if (rv != KERN_SUCCESS)
444 vm_object_deallocate(object);
448 return (KERN_SUCCESS);
453 __elfN(load_section)(struct vmspace *vmspace,
454 vm_object_t object, vm_offset_t offset,
455 caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot,
460 vm_offset_t map_addr;
463 vm_offset_t file_addr;
466 * It's necessary to fail if the filsz + offset taken from the
467 * header is greater than the actual file pager object's size.
468 * If we were to allow this, then the vm_map_find() below would
469 * walk right off the end of the file object and into the ether.
471 * While I'm here, might as well check for something else that
472 * is invalid: filsz cannot be greater than memsz.
474 if ((off_t)filsz + offset > object->un_pager.vnp.vnp_size ||
476 uprintf("elf_load_section: truncated ELF file\n");
480 map_addr = trunc_page_ps((vm_offset_t)vmaddr, pagesize);
481 file_addr = trunc_page_ps(offset, pagesize);
484 * We have two choices. We can either clear the data in the last page
485 * of an oversized mapping, or we can start the anon mapping a page
486 * early and copy the initialized data into that first page. We
487 * choose the second..
490 map_len = trunc_page_ps(offset + filsz, pagesize) - file_addr;
492 map_len = round_page_ps(offset + filsz, pagesize) - file_addr;
495 /* cow flags: don't dump readonly sections in core */
496 cow = MAP_COPY_ON_WRITE | MAP_PREFAULT |
497 (prot & VM_PROT_WRITE ? 0 : MAP_DISABLE_COREDUMP);
499 rv = __elfN(map_insert)(&vmspace->vm_map,
501 file_addr, /* file offset */
502 map_addr, /* virtual start */
503 map_addr + map_len,/* virtual end */
506 if (rv != KERN_SUCCESS)
509 /* we can stop now if we've covered it all */
510 if (memsz == filsz) {
517 * We have to get the remaining bit of the file into the first part
518 * of the oversized map segment. This is normally because the .data
519 * segment in the file is extended to provide bss. It's a neat idea
520 * to try and save a page, but it's a pain in the behind to implement.
522 copy_len = (offset + filsz) - trunc_page_ps(offset + filsz, pagesize);
523 map_addr = trunc_page_ps((vm_offset_t)vmaddr + filsz, pagesize);
524 map_len = round_page_ps((vm_offset_t)vmaddr + memsz, pagesize) -
527 /* This had damn well better be true! */
529 rv = __elfN(map_insert)(&vmspace->vm_map, NULL, 0, map_addr,
530 map_addr + map_len, VM_PROT_ALL, 0);
531 if (rv != KERN_SUCCESS) {
539 sf = vm_imgact_map_page(object, offset + filsz);
543 /* send the page fragment to user space */
544 off = trunc_page_ps(offset + filsz, pagesize) -
545 trunc_page(offset + filsz);
546 error = copyout((caddr_t)sf_buf_kva(sf) + off,
547 (caddr_t)map_addr, copy_len);
548 vm_imgact_unmap_page(sf);
555 * set it to the specified protection.
556 * XXX had better undo the damage from pasting over the cracks here!
558 vm_map_protect(&vmspace->vm_map, trunc_page(map_addr),
559 round_page(map_addr + map_len), prot, FALSE);
565 * Load the file "file" into memory. It may be either a shared object
568 * The "addr" reference parameter is in/out. On entry, it specifies
569 * the address where a shared object should be loaded. If the file is
570 * an executable, this value is ignored. On exit, "addr" specifies
571 * where the file was actually loaded.
573 * The "entry" reference parameter is out only. On exit, it specifies
574 * the entry point for the loaded file.
577 __elfN(load_file)(struct proc *p, const char *file, u_long *addr,
578 u_long *entry, size_t pagesize)
583 struct image_params image_params;
585 const Elf_Ehdr *hdr = NULL;
586 const Elf_Phdr *phdr = NULL;
587 struct nameidata *nd;
588 struct vmspace *vmspace = p->p_vmspace;
590 struct image_params *imgp;
593 u_long base_addr = 0;
594 int vfslocked, error, i, numsegs;
596 #ifdef CAPABILITY_MODE
598 * XXXJA: This check can go away once we are sufficiently confident
599 * that the checks in namei() are correct.
601 if (IN_CAPABILITY_MODE(curthread))
605 tempdata = malloc(sizeof(*tempdata), M_TEMP, M_WAITOK);
607 attr = &tempdata->attr;
608 imgp = &tempdata->image_params;
611 * Initialize part of the common data
615 imgp->firstpage = NULL;
616 imgp->image_header = NULL;
618 imgp->execlabel = NULL;
620 NDINIT(nd, LOOKUP, MPSAFE|LOCKLEAF|FOLLOW, UIO_SYSSPACE, file,
623 if ((error = namei(nd)) != 0) {
627 vfslocked = NDHASGIANT(nd);
628 NDFREE(nd, NDF_ONLY_PNBUF);
629 imgp->vp = nd->ni_vp;
632 * Check permissions, modes, uid, etc on the file, and "open" it.
634 error = exec_check_permissions(imgp);
638 error = exec_map_first_page(imgp);
643 * Also make certain that the interpreter stays the same, so set
644 * its VV_TEXT flag, too.
646 nd->ni_vp->v_vflag |= VV_TEXT;
648 imgp->object = nd->ni_vp->v_object;
650 hdr = (const Elf_Ehdr *)imgp->image_header;
651 if ((error = __elfN(check_header)(hdr)) != 0)
653 if (hdr->e_type == ET_DYN)
655 else if (hdr->e_type == ET_EXEC)
662 /* Only support headers that fit within first page for now */
663 /* (multiplication of two Elf_Half fields will not overflow) */
664 if ((hdr->e_phoff > PAGE_SIZE) ||
665 (hdr->e_phentsize * hdr->e_phnum) > PAGE_SIZE - hdr->e_phoff) {
670 phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff);
671 if (!aligned(phdr, Elf_Addr)) {
676 for (i = 0, numsegs = 0; i < hdr->e_phnum; i++) {
677 if (phdr[i].p_type == PT_LOAD && phdr[i].p_memsz != 0) {
678 /* Loadable segment */
679 prot = __elfN(trans_prot)(phdr[i].p_flags);
680 if ((error = __elfN(load_section)(vmspace,
681 imgp->object, phdr[i].p_offset,
682 (caddr_t)(uintptr_t)phdr[i].p_vaddr + rbase,
683 phdr[i].p_memsz, phdr[i].p_filesz, prot,
687 * Establish the base address if this is the
691 base_addr = trunc_page(phdr[i].p_vaddr +
697 *entry = (unsigned long)hdr->e_entry + rbase;
701 exec_unmap_first_page(imgp);
706 VFS_UNLOCK_GIANT(vfslocked);
707 free(tempdata, M_TEMP);
713 __CONCAT(exec_, __elfN(imgact))(struct image_params *imgp)
715 const Elf_Ehdr *hdr = (const Elf_Ehdr *)imgp->image_header;
716 const Elf_Phdr *phdr;
717 Elf_Auxargs *elf_auxargs;
718 struct vmspace *vmspace;
720 u_long text_size = 0, data_size = 0, total_size = 0;
721 u_long text_addr = 0, data_addr = 0;
722 u_long seg_size, seg_addr;
723 u_long addr, baddr, et_dyn_addr, entry = 0, proghdr = 0;
726 const char *interp = NULL, *newinterp = NULL;
727 Elf_Brandinfo *brand_info;
729 struct sysentvec *sv;
732 * Do we have a valid ELF header ?
734 * Only allow ET_EXEC & ET_DYN here, reject ET_DYN later
735 * if particular brand doesn't support it.
737 if (__elfN(check_header)(hdr) != 0 ||
738 (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN))
742 * From here on down, we return an errno, not -1, as we've
743 * detected an ELF file.
746 if ((hdr->e_phoff > PAGE_SIZE) ||
747 (hdr->e_phoff + hdr->e_phentsize * hdr->e_phnum) > PAGE_SIZE) {
748 /* Only support headers in first page for now */
751 phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff);
752 if (!aligned(phdr, Elf_Addr))
756 for (i = 0; i < hdr->e_phnum; i++) {
757 switch (phdr[i].p_type) {
760 baddr = phdr[i].p_vaddr;
764 /* Path to interpreter */
765 if (phdr[i].p_filesz > MAXPATHLEN ||
766 phdr[i].p_offset + phdr[i].p_filesz > PAGE_SIZE)
768 interp = imgp->image_header + phdr[i].p_offset;
773 __elfN(trans_prot)(phdr[i].p_flags);
778 brand_info = __elfN(get_brandinfo)(imgp, interp, &osrel);
779 if (brand_info == NULL) {
780 uprintf("ELF binary type \"%u\" not known.\n",
781 hdr->e_ident[EI_OSABI]);
784 if (hdr->e_type == ET_DYN) {
785 if ((brand_info->flags & BI_CAN_EXEC_DYN) == 0)
788 * Honour the base load address from the dso if it is
789 * non-zero for some reason.
792 et_dyn_addr = ET_DYN_LOAD_ADDR;
797 sv = brand_info->sysvec;
798 if (interp != NULL && brand_info->interp_newpath != NULL)
799 newinterp = brand_info->interp_newpath;
802 * Avoid a possible deadlock if the current address space is destroyed
803 * and that address space maps the locked vnode. In the common case,
804 * the locked vnode's v_usecount is decremented but remains greater
805 * than zero. Consequently, the vnode lock is not needed by vrele().
806 * However, in cases where the vnode lock is external, such as nullfs,
807 * v_usecount may become zero.
809 VOP_UNLOCK(imgp->vp, 0);
811 error = exec_new_vmspace(imgp, sv);
812 imgp->proc->p_sysent = sv;
814 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
818 vmspace = imgp->proc->p_vmspace;
820 for (i = 0; i < hdr->e_phnum; i++) {
821 switch (phdr[i].p_type) {
822 case PT_LOAD: /* Loadable segment */
823 if (phdr[i].p_memsz == 0)
825 prot = __elfN(trans_prot)(phdr[i].p_flags);
827 #if defined(__ia64__) && __ELF_WORD_SIZE == 32 && defined(IA32_ME_HARDER)
829 * Some x86 binaries assume read == executable,
830 * notably the M3 runtime and therefore cvsup
832 if (prot & VM_PROT_READ)
833 prot |= VM_PROT_EXECUTE;
836 if ((error = __elfN(load_section)(vmspace,
837 imgp->object, phdr[i].p_offset,
838 (caddr_t)(uintptr_t)phdr[i].p_vaddr + et_dyn_addr,
839 phdr[i].p_memsz, phdr[i].p_filesz, prot,
840 sv->sv_pagesize)) != 0)
844 * If this segment contains the program headers,
845 * remember their virtual address for the AT_PHDR
846 * aux entry. Static binaries don't usually include
849 if (phdr[i].p_offset == 0 &&
850 hdr->e_phoff + hdr->e_phnum * hdr->e_phentsize
852 proghdr = phdr[i].p_vaddr + hdr->e_phoff +
855 seg_addr = trunc_page(phdr[i].p_vaddr + et_dyn_addr);
856 seg_size = round_page(phdr[i].p_memsz +
857 phdr[i].p_vaddr + et_dyn_addr - seg_addr);
860 * Make the largest executable segment the official
861 * text segment and all others data.
863 * Note that obreak() assumes that data_addr +
864 * data_size == end of data load area, and the ELF
865 * file format expects segments to be sorted by
866 * address. If multiple data segments exist, the
867 * last one will be used.
870 if (phdr[i].p_flags & PF_X && text_size < seg_size) {
871 text_size = seg_size;
872 text_addr = seg_addr;
874 data_size = seg_size;
875 data_addr = seg_addr;
877 total_size += seg_size;
879 case PT_PHDR: /* Program header table info */
880 proghdr = phdr[i].p_vaddr + et_dyn_addr;
887 if (data_addr == 0 && data_size == 0) {
888 data_addr = text_addr;
889 data_size = text_size;
892 entry = (u_long)hdr->e_entry + et_dyn_addr;
895 * Check limits. It should be safe to check the
896 * limits after loading the segments since we do
897 * not actually fault in all the segments pages.
899 PROC_LOCK(imgp->proc);
900 if (data_size > lim_cur(imgp->proc, RLIMIT_DATA) ||
901 text_size > maxtsiz ||
902 total_size > lim_cur(imgp->proc, RLIMIT_VMEM) ||
903 racct_set(imgp->proc, RACCT_DATA, data_size) != 0 ||
904 racct_set(imgp->proc, RACCT_VMEM, total_size) != 0) {
905 PROC_UNLOCK(imgp->proc);
909 vmspace->vm_tsize = text_size >> PAGE_SHIFT;
910 vmspace->vm_taddr = (caddr_t)(uintptr_t)text_addr;
911 vmspace->vm_dsize = data_size >> PAGE_SHIFT;
912 vmspace->vm_daddr = (caddr_t)(uintptr_t)data_addr;
915 * We load the dynamic linker where a userland call
916 * to mmap(0, ...) would put it. The rationale behind this
917 * calculation is that it leaves room for the heap to grow to
918 * its maximum allowed size.
920 addr = round_page((vm_offset_t)imgp->proc->p_vmspace->vm_daddr +
921 lim_max(imgp->proc, RLIMIT_DATA));
922 PROC_UNLOCK(imgp->proc);
924 imgp->entry_addr = entry;
926 if (interp != NULL) {
927 int have_interp = FALSE;
928 VOP_UNLOCK(imgp->vp, 0);
929 if (brand_info->emul_path != NULL &&
930 brand_info->emul_path[0] != '\0') {
931 path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
932 snprintf(path, MAXPATHLEN, "%s%s",
933 brand_info->emul_path, interp);
934 error = __elfN(load_file)(imgp->proc, path, &addr,
935 &imgp->entry_addr, sv->sv_pagesize);
940 if (!have_interp && newinterp != NULL) {
941 error = __elfN(load_file)(imgp->proc, newinterp, &addr,
942 &imgp->entry_addr, sv->sv_pagesize);
947 error = __elfN(load_file)(imgp->proc, interp, &addr,
948 &imgp->entry_addr, sv->sv_pagesize);
950 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY);
952 uprintf("ELF interpreter %s not found\n", interp);
959 * Construct auxargs table (used by the fixup routine)
961 elf_auxargs = malloc(sizeof(Elf_Auxargs), M_TEMP, M_WAITOK);
962 elf_auxargs->execfd = -1;
963 elf_auxargs->phdr = proghdr;
964 elf_auxargs->phent = hdr->e_phentsize;
965 elf_auxargs->phnum = hdr->e_phnum;
966 elf_auxargs->pagesz = PAGE_SIZE;
967 elf_auxargs->base = addr;
968 elf_auxargs->flags = 0;
969 elf_auxargs->entry = entry;
971 imgp->auxargs = elf_auxargs;
972 imgp->interpreted = 0;
973 imgp->reloc_base = addr;
974 imgp->proc->p_osrel = osrel;
979 #define suword __CONCAT(suword, __ELF_WORD_SIZE)
982 __elfN(freebsd_fixup)(register_t **stack_base, struct image_params *imgp)
984 Elf_Auxargs *args = (Elf_Auxargs *)imgp->auxargs;
988 base = (Elf_Addr *)*stack_base;
989 pos = base + (imgp->args->argc + imgp->args->envc + 2);
991 if (args->execfd != -1)
992 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd);
993 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr);
994 AUXARGS_ENTRY(pos, AT_PHENT, args->phent);
995 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum);
996 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz);
997 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags);
998 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry);
999 AUXARGS_ENTRY(pos, AT_BASE, args->base);
1000 if (imgp->execpathp != 0)
1001 AUXARGS_ENTRY(pos, AT_EXECPATH, imgp->execpathp);
1002 AUXARGS_ENTRY(pos, AT_OSRELDATE, osreldate);
1003 if (imgp->canary != 0) {
1004 AUXARGS_ENTRY(pos, AT_CANARY, imgp->canary);
1005 AUXARGS_ENTRY(pos, AT_CANARYLEN, imgp->canarylen);
1007 AUXARGS_ENTRY(pos, AT_NCPUS, mp_ncpus);
1008 if (imgp->pagesizes != 0) {
1009 AUXARGS_ENTRY(pos, AT_PAGESIZES, imgp->pagesizes);
1010 AUXARGS_ENTRY(pos, AT_PAGESIZESLEN, imgp->pagesizeslen);
1012 AUXARGS_ENTRY(pos, AT_STACKPROT, imgp->sysent->sv_shared_page_obj
1013 != NULL && imgp->stack_prot != 0 ? imgp->stack_prot :
1014 imgp->sysent->sv_stackprot);
1015 AUXARGS_ENTRY(pos, AT_NULL, 0);
1017 free(imgp->auxargs, M_TEMP);
1018 imgp->auxargs = NULL;
1021 suword(base, (long)imgp->args->argc);
1022 *stack_base = (register_t *)base;
1027 * Code for generating ELF core dumps.
1030 typedef void (*segment_callback)(vm_map_entry_t, void *);
1032 /* Closure for cb_put_phdr(). */
1033 struct phdr_closure {
1034 Elf_Phdr *phdr; /* Program header to fill in */
1035 Elf_Off offset; /* Offset of segment in core file */
1038 /* Closure for cb_size_segment(). */
1039 struct sseg_closure {
1040 int count; /* Count of writable segments. */
1041 size_t size; /* Total size of all writable segments. */
1044 static void cb_put_phdr(vm_map_entry_t, void *);
1045 static void cb_size_segment(vm_map_entry_t, void *);
1046 static void each_writable_segment(struct thread *, segment_callback, void *);
1047 static int __elfN(corehdr)(struct thread *, struct vnode *, struct ucred *,
1048 int, void *, size_t, gzFile);
1049 static void __elfN(puthdr)(struct thread *, void *, size_t *, int);
1050 static void __elfN(putnote)(void *, size_t *, const char *, int,
1051 const void *, size_t);
1053 #ifdef COMPRESS_USER_CORES
1054 extern int compress_user_cores;
1055 extern int compress_user_cores_gzlevel;
1059 core_output(struct vnode *vp, void *base, size_t len, off_t offset,
1060 struct ucred *active_cred, struct ucred *file_cred,
1061 struct thread *td, char *core_buf, gzFile gzfile) {
1065 #ifdef COMPRESS_USER_CORES
1066 error = compress_core(gzfile, base, core_buf, len, td);
1068 panic("shouldn't be here");
1071 error = vn_rdwr_inchunks(UIO_WRITE, vp, base, len, offset,
1072 UIO_USERSPACE, IO_UNIT | IO_DIRECT, active_cred, file_cred,
1079 __elfN(coredump)(struct thread *td, struct vnode *vp, off_t limit, int flags)
1081 struct ucred *cred = td->td_ucred;
1083 struct sseg_closure seginfo;
1087 gzFile gzfile = Z_NULL;
1088 char *core_buf = NULL;
1089 #ifdef COMPRESS_USER_CORES
1090 char gzopen_flags[8];
1092 int doing_compress = flags & IMGACT_CORE_COMPRESS;
1097 #ifdef COMPRESS_USER_CORES
1098 if (doing_compress) {
1101 if (compress_user_cores_gzlevel >= 0 &&
1102 compress_user_cores_gzlevel <= 9)
1103 *p++ = '0' + compress_user_cores_gzlevel;
1105 gzfile = gz_open("", gzopen_flags, vp);
1106 if (gzfile == Z_NULL) {
1110 core_buf = malloc(CORE_BUF_SIZE, M_TEMP, M_WAITOK | M_ZERO);
1118 /* Size the program segments. */
1121 each_writable_segment(td, cb_size_segment, &seginfo);
1124 * Calculate the size of the core file header area by making
1125 * a dry run of generating it. Nothing is written, but the
1126 * size is calculated.
1129 __elfN(puthdr)(td, (void *)NULL, &hdrsize, seginfo.count);
1132 PROC_LOCK(td->td_proc);
1133 error = racct_add(td->td_proc, RACCT_CORE, hdrsize + seginfo.size);
1134 PROC_UNLOCK(td->td_proc);
1140 if (hdrsize + seginfo.size >= limit) {
1146 * Allocate memory for building the header, fill it up,
1149 hdr = malloc(hdrsize, M_TEMP, M_WAITOK);
1154 error = __elfN(corehdr)(td, vp, cred, seginfo.count, hdr, hdrsize,
1157 /* Write the contents of all of the writable segments. */
1163 php = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr)) + 1;
1165 for (i = 0; i < seginfo.count; i++) {
1166 error = core_output(vp, (caddr_t)(uintptr_t)php->p_vaddr,
1167 php->p_filesz, offset, cred, NOCRED, curthread, core_buf, gzfile);
1170 offset += php->p_filesz;
1176 "Failed to write core file for process %s (error %d)\n",
1177 curproc->p_comm, error);
1181 #ifdef COMPRESS_USER_CORES
1183 free(core_buf, M_TEMP);
1194 * A callback for each_writable_segment() to write out the segment's
1195 * program header entry.
1198 cb_put_phdr(entry, closure)
1199 vm_map_entry_t entry;
1202 struct phdr_closure *phc = (struct phdr_closure *)closure;
1203 Elf_Phdr *phdr = phc->phdr;
1205 phc->offset = round_page(phc->offset);
1207 phdr->p_type = PT_LOAD;
1208 phdr->p_offset = phc->offset;
1209 phdr->p_vaddr = entry->start;
1211 phdr->p_filesz = phdr->p_memsz = entry->end - entry->start;
1212 phdr->p_align = PAGE_SIZE;
1213 phdr->p_flags = __elfN(untrans_prot)(entry->protection);
1215 phc->offset += phdr->p_filesz;
1220 * A callback for each_writable_segment() to gather information about
1221 * the number of segments and their total size.
1224 cb_size_segment(entry, closure)
1225 vm_map_entry_t entry;
1228 struct sseg_closure *ssc = (struct sseg_closure *)closure;
1231 ssc->size += entry->end - entry->start;
1235 * For each writable segment in the process's memory map, call the given
1236 * function with a pointer to the map entry and some arbitrary
1237 * caller-supplied data.
1240 each_writable_segment(td, func, closure)
1242 segment_callback func;
1245 struct proc *p = td->td_proc;
1246 vm_map_t map = &p->p_vmspace->vm_map;
1247 vm_map_entry_t entry;
1248 vm_object_t backing_object, object;
1249 boolean_t ignore_entry;
1251 vm_map_lock_read(map);
1252 for (entry = map->header.next; entry != &map->header;
1253 entry = entry->next) {
1255 * Don't dump inaccessible mappings, deal with legacy
1258 * Note that read-only segments related to the elf binary
1259 * are marked MAP_ENTRY_NOCOREDUMP now so we no longer
1260 * need to arbitrarily ignore such segments.
1262 if (elf_legacy_coredump) {
1263 if ((entry->protection & VM_PROT_RW) != VM_PROT_RW)
1266 if ((entry->protection & VM_PROT_ALL) == 0)
1271 * Dont include memory segment in the coredump if
1272 * MAP_NOCORE is set in mmap(2) or MADV_NOCORE in
1273 * madvise(2). Do not dump submaps (i.e. parts of the
1276 if (entry->eflags & (MAP_ENTRY_NOCOREDUMP|MAP_ENTRY_IS_SUB_MAP))
1279 if ((object = entry->object.vm_object) == NULL)
1282 /* Ignore memory-mapped devices and such things. */
1283 VM_OBJECT_LOCK(object);
1284 while ((backing_object = object->backing_object) != NULL) {
1285 VM_OBJECT_LOCK(backing_object);
1286 VM_OBJECT_UNLOCK(object);
1287 object = backing_object;
1289 ignore_entry = object->type != OBJT_DEFAULT &&
1290 object->type != OBJT_SWAP && object->type != OBJT_VNODE;
1291 VM_OBJECT_UNLOCK(object);
1295 (*func)(entry, closure);
1297 vm_map_unlock_read(map);
1301 * Write the core file header to the file, including padding up to
1302 * the page boundary.
1305 __elfN(corehdr)(td, vp, cred, numsegs, hdr, hdrsize, gzfile)
1316 /* Fill in the header. */
1317 bzero(hdr, hdrsize);
1319 __elfN(puthdr)(td, hdr, &off, numsegs);
1322 /* Write it to the core file. */
1323 return (vn_rdwr_inchunks(UIO_WRITE, vp, hdr, hdrsize, (off_t)0,
1324 UIO_SYSSPACE, IO_UNIT | IO_DIRECT, cred, NOCRED, NULL,
1327 #ifdef COMPRESS_USER_CORES
1328 if (gzwrite(gzfile, hdr, hdrsize) != hdrsize) {
1330 "Failed to compress core file header for process"
1331 " %s.\n", curproc->p_comm);
1338 panic("shouldn't be here");
1343 #if defined(COMPAT_FREEBSD32) && __ELF_WORD_SIZE == 32
1344 #include <compat/freebsd32/freebsd32.h>
1346 typedef struct prstatus32 elf_prstatus_t;
1347 typedef struct prpsinfo32 elf_prpsinfo_t;
1348 typedef struct fpreg32 elf_prfpregset_t;
1349 typedef struct fpreg32 elf_fpregset_t;
1350 typedef struct reg32 elf_gregset_t;
1351 typedef struct thrmisc32 elf_thrmisc_t;
1353 typedef prstatus_t elf_prstatus_t;
1354 typedef prpsinfo_t elf_prpsinfo_t;
1355 typedef prfpregset_t elf_prfpregset_t;
1356 typedef prfpregset_t elf_fpregset_t;
1357 typedef gregset_t elf_gregset_t;
1358 typedef thrmisc_t elf_thrmisc_t;
1362 __elfN(puthdr)(struct thread *td, void *dst, size_t *off, int numsegs)
1365 elf_prstatus_t status;
1366 elf_prfpregset_t fpregset;
1367 elf_prpsinfo_t psinfo;
1368 elf_thrmisc_t thrmisc;
1370 elf_prstatus_t *status;
1371 elf_prfpregset_t *fpregset;
1372 elf_prpsinfo_t *psinfo;
1373 elf_thrmisc_t *thrmisc;
1376 size_t ehoff, noteoff, notesz, phoff;
1381 *off += sizeof(Elf_Ehdr);
1384 *off += (numsegs + 1) * sizeof(Elf_Phdr);
1388 * Don't allocate space for the notes if we're just calculating
1389 * the size of the header. We also don't collect the data.
1392 tempdata = malloc(sizeof(*tempdata), M_TEMP, M_ZERO|M_WAITOK);
1393 status = &tempdata->status;
1394 fpregset = &tempdata->fpregset;
1395 psinfo = &tempdata->psinfo;
1396 thrmisc = &tempdata->thrmisc;
1406 psinfo->pr_version = PRPSINFO_VERSION;
1407 psinfo->pr_psinfosz = sizeof(elf_prpsinfo_t);
1408 strlcpy(psinfo->pr_fname, p->p_comm, sizeof(psinfo->pr_fname));
1410 * XXX - We don't fill in the command line arguments properly
1413 strlcpy(psinfo->pr_psargs, p->p_comm,
1414 sizeof(psinfo->pr_psargs));
1416 __elfN(putnote)(dst, off, "FreeBSD", NT_PRPSINFO, psinfo,
1420 * To have the debugger select the right thread (LWP) as the initial
1421 * thread, we dump the state of the thread passed to us in td first.
1422 * This is the thread that causes the core dump and thus likely to
1423 * be the right thread one wants to have selected in the debugger.
1426 while (thr != NULL) {
1428 status->pr_version = PRSTATUS_VERSION;
1429 status->pr_statussz = sizeof(elf_prstatus_t);
1430 status->pr_gregsetsz = sizeof(elf_gregset_t);
1431 status->pr_fpregsetsz = sizeof(elf_fpregset_t);
1432 status->pr_osreldate = osreldate;
1433 status->pr_cursig = p->p_sig;
1434 status->pr_pid = thr->td_tid;
1435 #if defined(COMPAT_FREEBSD32) && __ELF_WORD_SIZE == 32
1436 fill_regs32(thr, &status->pr_reg);
1437 fill_fpregs32(thr, fpregset);
1439 fill_regs(thr, &status->pr_reg);
1440 fill_fpregs(thr, fpregset);
1442 memset(&thrmisc->_pad, 0, sizeof (thrmisc->_pad));
1443 strcpy(thrmisc->pr_tname, thr->td_name);
1445 __elfN(putnote)(dst, off, "FreeBSD", NT_PRSTATUS, status,
1447 __elfN(putnote)(dst, off, "FreeBSD", NT_FPREGSET, fpregset,
1449 __elfN(putnote)(dst, off, "FreeBSD", NT_THRMISC, thrmisc,
1452 * Allow for MD specific notes, as well as any MD
1453 * specific preparations for writing MI notes.
1455 __elfN(dump_thread)(thr, dst, off);
1457 thr = (thr == td) ? TAILQ_FIRST(&p->p_threads) :
1458 TAILQ_NEXT(thr, td_plist);
1460 thr = TAILQ_NEXT(thr, td_plist);
1463 notesz = *off - noteoff;
1466 free(tempdata, M_TEMP);
1468 /* Align up to a page boundary for the program segments. */
1469 *off = round_page(*off);
1474 struct phdr_closure phc;
1477 * Fill in the ELF header.
1479 ehdr = (Elf_Ehdr *)((char *)dst + ehoff);
1480 ehdr->e_ident[EI_MAG0] = ELFMAG0;
1481 ehdr->e_ident[EI_MAG1] = ELFMAG1;
1482 ehdr->e_ident[EI_MAG2] = ELFMAG2;
1483 ehdr->e_ident[EI_MAG3] = ELFMAG3;
1484 ehdr->e_ident[EI_CLASS] = ELF_CLASS;
1485 ehdr->e_ident[EI_DATA] = ELF_DATA;
1486 ehdr->e_ident[EI_VERSION] = EV_CURRENT;
1487 ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
1488 ehdr->e_ident[EI_ABIVERSION] = 0;
1489 ehdr->e_ident[EI_PAD] = 0;
1490 ehdr->e_type = ET_CORE;
1491 #if defined(COMPAT_FREEBSD32) && __ELF_WORD_SIZE == 32
1492 ehdr->e_machine = ELF_ARCH32;
1494 ehdr->e_machine = ELF_ARCH;
1496 ehdr->e_version = EV_CURRENT;
1498 ehdr->e_phoff = phoff;
1500 ehdr->e_ehsize = sizeof(Elf_Ehdr);
1501 ehdr->e_phentsize = sizeof(Elf_Phdr);
1502 ehdr->e_phnum = numsegs + 1;
1503 ehdr->e_shentsize = sizeof(Elf_Shdr);
1505 ehdr->e_shstrndx = SHN_UNDEF;
1508 * Fill in the program header entries.
1510 phdr = (Elf_Phdr *)((char *)dst + phoff);
1512 /* The note segement. */
1513 phdr->p_type = PT_NOTE;
1514 phdr->p_offset = noteoff;
1517 phdr->p_filesz = notesz;
1523 /* All the writable segments from the program. */
1526 each_writable_segment(td, cb_put_phdr, &phc);
1531 __elfN(putnote)(void *dst, size_t *off, const char *name, int type,
1532 const void *desc, size_t descsz)
1536 note.n_namesz = strlen(name) + 1;
1537 note.n_descsz = descsz;
1540 bcopy(¬e, (char *)dst + *off, sizeof note);
1541 *off += sizeof note;
1543 bcopy(name, (char *)dst + *off, note.n_namesz);
1544 *off += roundup2(note.n_namesz, sizeof(Elf_Size));
1546 bcopy(desc, (char *)dst + *off, note.n_descsz);
1547 *off += roundup2(note.n_descsz, sizeof(Elf_Size));
1551 __elfN(parse_notes)(struct image_params *imgp, Elf_Brandnote *checknote,
1552 int32_t *osrel, const Elf_Phdr *pnote)
1554 const Elf_Note *note, *note0, *note_end;
1555 const char *note_name;
1558 if (pnote == NULL || pnote->p_offset >= PAGE_SIZE ||
1559 pnote->p_offset + pnote->p_filesz >= PAGE_SIZE)
1562 note = note0 = (const Elf_Note *)(imgp->image_header + pnote->p_offset);
1563 note_end = (const Elf_Note *)(imgp->image_header +
1564 pnote->p_offset + pnote->p_filesz);
1565 for (i = 0; i < 100 && note >= note0 && note < note_end; i++) {
1566 if (!aligned(note, Elf32_Addr))
1568 if (note->n_namesz != checknote->hdr.n_namesz ||
1569 note->n_descsz != checknote->hdr.n_descsz ||
1570 note->n_type != checknote->hdr.n_type)
1572 note_name = (const char *)(note + 1);
1573 if (strncmp(checknote->vendor, note_name,
1574 checknote->hdr.n_namesz) != 0)
1578 * Fetch the osreldate for binary
1579 * from the ELF OSABI-note if necessary.
1581 if ((checknote->flags & BN_TRANSLATE_OSREL) != 0 &&
1582 checknote->trans_osrel != NULL)
1583 return (checknote->trans_osrel(note, osrel));
1587 note = (const Elf_Note *)((const char *)(note + 1) +
1588 roundup2(note->n_namesz, sizeof(Elf32_Addr)) +
1589 roundup2(note->n_descsz, sizeof(Elf32_Addr)));
1596 * Try to find the appropriate ABI-note section for checknote,
1597 * fetch the osreldate for binary from the ELF OSABI-note. Only the
1598 * first page of the image is searched, the same as for headers.
1601 __elfN(check_note)(struct image_params *imgp, Elf_Brandnote *checknote,
1604 const Elf_Phdr *phdr;
1605 const Elf_Ehdr *hdr;
1608 hdr = (const Elf_Ehdr *)imgp->image_header;
1609 phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff);
1611 for (i = 0; i < hdr->e_phnum; i++) {
1612 if (phdr[i].p_type == PT_NOTE &&
1613 __elfN(parse_notes)(imgp, checknote, osrel, &phdr[i]))
1621 * Tell kern_execve.c about it, with a little help from the linker.
1623 static struct execsw __elfN(execsw) = {
1624 __CONCAT(exec_, __elfN(imgact)),
1625 __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE))
1627 EXEC_SET(__CONCAT(elf, __ELF_WORD_SIZE), __elfN(execsw));
1629 #ifdef COMPRESS_USER_CORES
1631 * Compress and write out a core segment for a user process.
1633 * 'inbuf' is the starting address of a VM segment in the process' address
1634 * space that is to be compressed and written out to the core file. 'dest_buf'
1635 * is a buffer in the kernel's address space. The segment is copied from
1636 * 'inbuf' to 'dest_buf' first before being processed by the compression
1637 * routine gzwrite(). This copying is necessary because the content of the VM
1638 * segment may change between the compression pass and the crc-computation pass
1639 * in gzwrite(). This is because realtime threads may preempt the UNIX kernel.
1642 compress_core (gzFile file, char *inbuf, char *dest_buf, unsigned int len,
1647 unsigned int chunk_len;
1650 chunk_len = (len > CORE_BUF_SIZE) ? CORE_BUF_SIZE : len;
1651 copyin(inbuf, dest_buf, chunk_len);
1652 len_compressed = gzwrite(file, dest_buf, chunk_len);
1654 EVENTHANDLER_INVOKE(app_coredump_progress, td, len_compressed);
1656 if ((unsigned int)len_compressed != chunk_len) {
1658 "compress_core: length mismatch (0x%x returned, "
1659 "0x%x expected)\n", len_compressed, chunk_len);
1660 EVENTHANDLER_INVOKE(app_coredump_error, td,
1661 "compress_core: length mismatch %x -> %x",
1662 chunk_len, len_compressed);
1673 #endif /* COMPRESS_USER_CORES */
1676 __elfN(trans_prot)(Elf_Word flags)
1682 prot |= VM_PROT_EXECUTE;
1684 prot |= VM_PROT_WRITE;
1686 prot |= VM_PROT_READ;
1687 #if __ELF_WORD_SIZE == 32
1688 #if defined(__amd64__) || defined(__ia64__)
1689 if (i386_read_exec && (flags & PF_R))
1690 prot |= VM_PROT_EXECUTE;
1697 __elfN(untrans_prot)(vm_prot_t prot)
1702 if (prot & VM_PROT_EXECUTE)
1704 if (prot & VM_PROT_READ)
1706 if (prot & VM_PROT_WRITE)