2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2017 Dell EMC
5 * Copyright (c) 2007 Sandvine Incorporated
6 * Copyright (c) 1998 John D. Polstra
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/endian.h>
35 #include <sys/param.h>
36 #include <sys/procfs.h>
37 #include <sys/ptrace.h>
38 #include <sys/queue.h>
39 #include <sys/linker_set.h>
41 #include <sys/sysctl.h>
44 #include <machine/elf.h>
45 #include <vm/vm_param.h>
48 #include <vm/vm_map.h>
64 * Code for generating ELF core dumps.
67 typedef void (*segment_callback)(vm_map_entry_t, void *);
69 /* Closure for cb_put_phdr(). */
71 Elf_Phdr *phdr; /* Program header to fill in */
72 Elf_Off offset; /* Offset of segment in core file */
75 /* Closure for cb_size_segment(). */
77 int count; /* Count of writable segments. */
78 size_t size; /* Total size of all writable segments. */
81 #ifdef ELFCORE_COMPAT_32
82 typedef struct fpreg32 elfcore_fpregset_t;
83 typedef struct reg32 elfcore_gregset_t;
84 typedef struct prpsinfo32 elfcore_prpsinfo_t;
85 typedef struct prstatus32 elfcore_prstatus_t;
86 typedef struct ptrace_lwpinfo32 elfcore_lwpinfo_t;
87 static void elf_convert_gregset(elfcore_gregset_t *rd, struct reg *rs);
88 static void elf_convert_fpregset(elfcore_fpregset_t *rd, struct fpreg *rs);
89 static void elf_convert_lwpinfo(struct ptrace_lwpinfo32 *pld,
90 struct ptrace_lwpinfo *pls);
92 typedef fpregset_t elfcore_fpregset_t;
93 typedef gregset_t elfcore_gregset_t;
94 typedef prpsinfo_t elfcore_prpsinfo_t;
95 typedef prstatus_t elfcore_prstatus_t;
96 typedef struct ptrace_lwpinfo elfcore_lwpinfo_t;
97 #define elf_convert_gregset(d,s) *d = *s
98 #define elf_convert_fpregset(d,s) *d = *s
99 #define elf_convert_lwpinfo(d,s) *d = *s
102 typedef void* (*notefunc_t)(void *, size_t *);
104 static void cb_put_phdr(vm_map_entry_t, void *);
105 static void cb_size_segment(vm_map_entry_t, void *);
106 static void each_dumpable_segment(vm_map_entry_t, segment_callback,
108 static void elf_detach(void); /* atexit() handler. */
109 static void *elf_note_fpregset(void *, size_t *);
110 static void *elf_note_prpsinfo(void *, size_t *);
111 static void *elf_note_prstatus(void *, size_t *);
112 static void *elf_note_thrmisc(void *, size_t *);
113 static void *elf_note_ptlwpinfo(void *, size_t *);
115 static void *elf_note_arm_vfp(void *, size_t *);
117 #if defined(__i386__) || defined(__amd64__)
118 static void *elf_note_x86_xstate(void *, size_t *);
120 #if defined(__powerpc__)
121 static void *elf_note_powerpc_vmx(void *, size_t *);
123 static void *elf_note_procstat_auxv(void *, size_t *);
124 static void *elf_note_procstat_files(void *, size_t *);
125 static void *elf_note_procstat_groups(void *, size_t *);
126 static void *elf_note_procstat_osrel(void *, size_t *);
127 static void *elf_note_procstat_proc(void *, size_t *);
128 static void *elf_note_procstat_psstrings(void *, size_t *);
129 static void *elf_note_procstat_rlimit(void *, size_t *);
130 static void *elf_note_procstat_umask(void *, size_t *);
131 static void *elf_note_procstat_vmmap(void *, size_t *);
132 static void elf_puthdr(int, pid_t, vm_map_entry_t, void *, size_t, size_t,
134 static void elf_putnote(int, notefunc_t, void *, struct sbuf *);
135 static void elf_putnotes(pid_t, struct sbuf *, size_t *);
136 static void freemap(vm_map_entry_t);
137 static vm_map_entry_t readmap(pid_t);
138 static void *procstat_sysctl(void *, int, size_t, size_t *sizep);
140 static pid_t g_pid; /* Pid being dumped, global for elf_detach */
141 static int g_status; /* proc status after ptrace attach */
144 elf_ident(int efd, pid_t pid __unused, char *binfile __unused)
150 cnt = read(efd, &hdr, sizeof(hdr));
151 if (cnt != sizeof(hdr))
155 switch (hdr.e_ident[EI_DATA]) {
157 machine = le16toh(hdr.e_machine);
160 machine = be16toh(hdr.e_machine);
165 if (!ELF_MACHINE_OK(machine))
179 * Forward any pending signals. SIGSTOP is generated by ptrace
180 * itself, so ignore it.
182 sig = WIFSTOPPED(g_status) ? WSTOPSIG(g_status) : 0;
185 ptrace(PT_DETACH, g_pid, (caddr_t)1, sig);
190 * Write an ELF coredump for the given pid to the given fd.
193 elf_coredump(int efd, int fd, pid_t pid)
196 struct sseg_closure seginfo;
199 size_t hdrsize, notesz, segoff;
204 /* Attach to process to dump. */
206 if (atexit(elf_detach) != 0)
209 ptrace(PT_ATTACH, pid, NULL, 0);
212 if (waitpid(pid, &g_status, 0) == -1)
215 /* Get the program's memory map. */
218 /* Size the program segments. */
221 each_dumpable_segment(map, cb_size_segment, &seginfo);
224 * Build the header and the notes using sbuf and write to the file.
226 sb = sbuf_new_auto();
227 hdrsize = sizeof(Elf_Ehdr) + sizeof(Elf_Phdr) * (1 + seginfo.count);
228 if (seginfo.count + 1 >= PN_XNUM)
229 hdrsize += sizeof(Elf_Shdr);
230 /* Start header + notes section. */
231 sbuf_start_section(sb, NULL);
232 /* Make empty header subsection. */
233 sbuf_start_section(sb, &old_len);
235 sbuf_end_section(sb, old_len, hdrsize, 0);
237 elf_putnotes(pid, sb, ¬esz);
238 /* Align up to a page boundary for the program segments. */
239 sbuf_end_section(sb, -1, PAGE_SIZE, 0);
240 if (sbuf_finish(sb) != 0)
241 err(1, "sbuf_finish");
243 segoff = sbuf_len(sb);
244 /* Fill in the header. */
245 elf_puthdr(efd, pid, map, hdr, hdrsize, notesz, segoff, seginfo.count);
247 n = write(fd, hdr, segoff);
251 errx(1, "short write");
253 /* Write the contents of all of the writable segments. */
254 php = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr)) + 1;
255 for (i = 0; i < seginfo.count; i++) {
256 struct ptrace_io_desc iorequest;
257 uintmax_t nleft = php->p_filesz;
259 iorequest.piod_op = PIOD_READ_D;
260 iorequest.piod_offs = (caddr_t)(uintptr_t)php->p_vaddr;
266 if (nleft > sizeof(buf))
270 iorequest.piod_addr = buf;
271 iorequest.piod_len = nwant;
272 ptrace(PT_IO, pid, (caddr_t)&iorequest, 0);
273 ngot = iorequest.piod_len;
274 if ((size_t)ngot < nwant)
275 errx(1, "short read wanted %zu, got %zd",
277 ngot = write(fd, buf, nwant);
279 err(1, "write of segment %d failed", i);
280 if ((size_t)ngot != nwant)
281 errx(1, "short write");
283 iorequest.piod_offs += ngot;
292 * A callback for each_dumpable_segment() to write out the segment's
293 * program header entry.
296 cb_put_phdr(vm_map_entry_t entry, void *closure)
298 struct phdr_closure *phc = (struct phdr_closure *)closure;
299 Elf_Phdr *phdr = phc->phdr;
301 phc->offset = round_page(phc->offset);
303 phdr->p_type = PT_LOAD;
304 phdr->p_offset = phc->offset;
305 phdr->p_vaddr = entry->start;
307 phdr->p_filesz = phdr->p_memsz = entry->end - entry->start;
308 phdr->p_align = PAGE_SIZE;
310 if (entry->protection & VM_PROT_READ)
311 phdr->p_flags |= PF_R;
312 if (entry->protection & VM_PROT_WRITE)
313 phdr->p_flags |= PF_W;
314 if (entry->protection & VM_PROT_EXECUTE)
315 phdr->p_flags |= PF_X;
317 phc->offset += phdr->p_filesz;
322 * A callback for each_dumpable_segment() to gather information about
323 * the number of segments and their total size.
326 cb_size_segment(vm_map_entry_t entry, void *closure)
328 struct sseg_closure *ssc = (struct sseg_closure *)closure;
331 ssc->size += entry->end - entry->start;
335 * For each segment in the given memory map, call the given function
336 * with a pointer to the map entry and some arbitrary caller-supplied
340 each_dumpable_segment(vm_map_entry_t map, segment_callback func, void *closure)
342 vm_map_entry_t entry;
344 for (entry = map; entry != NULL; entry = entry->next)
345 (*func)(entry, closure);
349 elf_putnotes(pid_t pid, struct sbuf *sb, size_t *sizep)
352 size_t threads, old_len;
357 threads = ptrace(PT_GETNUMLWPS, pid, NULL, 0);
359 err(1, "PT_GETNUMLWPS");
360 tids = malloc(threads * sizeof(*tids));
362 errx(1, "out of memory");
364 ptrace(PT_GETLWPLIST, pid, (void *)tids, threads);
366 err(1, "PT_GETLWPLIST");
368 sbuf_start_section(sb, &old_len);
369 elf_putnote(NT_PRPSINFO, elf_note_prpsinfo, &pid, sb);
371 for (i = 0; i < threads; ++i) {
372 elf_putnote(NT_PRSTATUS, elf_note_prstatus, tids + i, sb);
373 elf_putnote(NT_FPREGSET, elf_note_fpregset, tids + i, sb);
374 elf_putnote(NT_THRMISC, elf_note_thrmisc, tids + i, sb);
375 elf_putnote(NT_PTLWPINFO, elf_note_ptlwpinfo, tids + i, sb);
377 elf_putnote(NT_ARM_VFP, elf_note_arm_vfp, tids + i, sb);
379 #if defined(__i386__) || defined(__amd64__)
380 elf_putnote(NT_X86_XSTATE, elf_note_x86_xstate, tids + i, sb);
382 #if defined(__powerpc__)
383 elf_putnote(NT_PPC_VMX, elf_note_powerpc_vmx, tids + i, sb);
387 #ifndef ELFCORE_COMPAT_32
388 elf_putnote(NT_PROCSTAT_PROC, elf_note_procstat_proc, &pid, sb);
389 elf_putnote(NT_PROCSTAT_FILES, elf_note_procstat_files, &pid, sb);
390 elf_putnote(NT_PROCSTAT_VMMAP, elf_note_procstat_vmmap, &pid, sb);
391 elf_putnote(NT_PROCSTAT_GROUPS, elf_note_procstat_groups, &pid, sb);
392 elf_putnote(NT_PROCSTAT_UMASK, elf_note_procstat_umask, &pid, sb);
393 elf_putnote(NT_PROCSTAT_RLIMIT, elf_note_procstat_rlimit, &pid, sb);
394 elf_putnote(NT_PROCSTAT_OSREL, elf_note_procstat_osrel, &pid, sb);
395 elf_putnote(NT_PROCSTAT_PSSTRINGS, elf_note_procstat_psstrings, &pid,
397 elf_putnote(NT_PROCSTAT_AUXV, elf_note_procstat_auxv, &pid, sb);
400 size = sbuf_end_section(sb, old_len, 1, 0);
402 err(1, "sbuf_end_section");
408 * Emit one note section to sbuf.
411 elf_putnote(int type, notefunc_t notefunc, void *arg, struct sbuf *sb)
418 desc = notefunc(arg, &descsz);
419 note.n_namesz = 8; /* strlen("FreeBSD") + 1 */
420 note.n_descsz = descsz;
423 sbuf_bcat(sb, ¬e, sizeof(note));
424 sbuf_start_section(sb, &old_len);
425 sbuf_bcat(sb, "FreeBSD", note.n_namesz);
426 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
429 sbuf_start_section(sb, &old_len);
430 sbuf_bcat(sb, desc, descsz);
431 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
436 * Generate the ELF coredump header.
439 elf_puthdr(int efd, pid_t pid, vm_map_entry_t map, void *hdr, size_t hdrsize,
440 size_t notesz, size_t segoff, int numsegs)
442 Elf_Ehdr *ehdr, binhdr;
445 struct phdr_closure phc;
448 cnt = read(efd, &binhdr, sizeof(binhdr));
450 err(1, "Failed to re-read ELF header");
451 else if (cnt != sizeof(binhdr))
452 errx(1, "Failed to re-read ELF header");
454 ehdr = (Elf_Ehdr *)hdr;
456 ehdr->e_ident[EI_MAG0] = ELFMAG0;
457 ehdr->e_ident[EI_MAG1] = ELFMAG1;
458 ehdr->e_ident[EI_MAG2] = ELFMAG2;
459 ehdr->e_ident[EI_MAG3] = ELFMAG3;
460 ehdr->e_ident[EI_CLASS] = ELF_CLASS;
461 ehdr->e_ident[EI_DATA] = ELF_DATA;
462 ehdr->e_ident[EI_VERSION] = EV_CURRENT;
463 ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
464 ehdr->e_ident[EI_ABIVERSION] = 0;
465 ehdr->e_ident[EI_PAD] = 0;
466 ehdr->e_type = ET_CORE;
467 ehdr->e_machine = binhdr.e_machine;
468 ehdr->e_version = EV_CURRENT;
470 ehdr->e_phoff = sizeof(Elf_Ehdr);
471 ehdr->e_flags = binhdr.e_flags;
472 ehdr->e_ehsize = sizeof(Elf_Ehdr);
473 ehdr->e_phentsize = sizeof(Elf_Phdr);
474 ehdr->e_shentsize = sizeof(Elf_Shdr);
475 ehdr->e_shstrndx = SHN_UNDEF;
476 if (numsegs + 1 < PN_XNUM) {
477 ehdr->e_phnum = numsegs + 1;
480 ehdr->e_phnum = PN_XNUM;
483 ehdr->e_shoff = ehdr->e_phoff +
484 (numsegs + 1) * ehdr->e_phentsize;
486 shdr = (Elf_Shdr *)((char *)hdr + ehdr->e_shoff);
487 memset(shdr, 0, sizeof(*shdr));
489 * A special first section is used to hold large segment and
490 * section counts. This was proposed by Sun Microsystems in
491 * Solaris and has been adopted by Linux; the standard ELF
492 * tools are already familiar with the technique.
494 * See table 7-7 of the Solaris "Linker and Libraries Guide"
495 * (or 12-7 depending on the version of the document) for more
498 shdr->sh_type = SHT_NULL;
499 shdr->sh_size = ehdr->e_shnum;
500 shdr->sh_link = ehdr->e_shstrndx;
501 shdr->sh_info = numsegs + 1;
505 * Fill in the program header entries.
507 phdr = (Elf_Phdr *)((char *)hdr + ehdr->e_phoff);
509 /* The note segement. */
510 phdr->p_type = PT_NOTE;
511 phdr->p_offset = hdrsize;
514 phdr->p_filesz = notesz;
516 phdr->p_flags = PF_R;
517 phdr->p_align = sizeof(Elf32_Size);
520 /* All the writable segments from the program. */
523 each_dumpable_segment(map, cb_put_phdr, &phc);
527 * Free the memory map.
530 freemap(vm_map_entry_t map)
533 while (map != NULL) {
534 vm_map_entry_t next = map->next;
541 * Read the process's memory map using kinfo_getvmmap(), and return a list of
542 * VM map entries. Only the non-device read/writable segments are
543 * returned. The map entries in the list aren't fully filled in; only
544 * the items we need are present.
546 static vm_map_entry_t
549 vm_map_entry_t ent, *linkp, map;
550 struct kinfo_vmentry *vmentl, *kve;
553 vmentl = kinfo_getvmmap(pid, &nitems);
555 err(1, "cannot retrieve mappings for %u process", pid);
559 for (i = 0; i < nitems; i++) {
563 * Ignore 'malformed' segments or ones representing memory
564 * mapping with MAP_NOCORE on.
565 * If the 'full' support is disabled, just dump the most
566 * meaningful data segments.
568 if ((kve->kve_protection & KVME_PROT_READ) == 0 ||
569 (kve->kve_flags & KVME_FLAG_NOCOREDUMP) != 0 ||
570 kve->kve_type == KVME_TYPE_DEAD ||
571 kve->kve_type == KVME_TYPE_UNKNOWN ||
572 ((pflags & PFLAGS_FULL) == 0 &&
573 kve->kve_type != KVME_TYPE_DEFAULT &&
574 kve->kve_type != KVME_TYPE_VNODE &&
575 kve->kve_type != KVME_TYPE_SWAP &&
576 kve->kve_type != KVME_TYPE_PHYS))
579 ent = calloc(1, sizeof(*ent));
581 errx(1, "out of memory");
582 ent->start = (vm_offset_t)kve->kve_start;
583 ent->end = (vm_offset_t)kve->kve_end;
584 ent->protection = VM_PROT_READ | VM_PROT_WRITE;
585 if ((kve->kve_protection & KVME_PROT_EXEC) != 0)
586 ent->protection |= VM_PROT_EXECUTE;
596 * Miscellaneous note out functions.
600 elf_note_prpsinfo(void *arg, size_t *sizep)
604 elfcore_prpsinfo_t *psinfo;
605 struct kinfo_proc kip;
610 psinfo = calloc(1, sizeof(*psinfo));
612 errx(1, "out of memory");
613 psinfo->pr_version = PRPSINFO_VERSION;
614 psinfo->pr_psinfosz = sizeof(*psinfo);
618 name[2] = KERN_PROC_PID;
621 if (sysctl(name, 4, &kip, &len, NULL, 0) == -1)
622 err(1, "kern.proc.pid.%u", pid);
623 if (kip.ki_pid != pid)
624 err(1, "kern.proc.pid.%u", pid);
625 strlcpy(psinfo->pr_fname, kip.ki_comm, sizeof(psinfo->pr_fname));
626 name[2] = KERN_PROC_ARGS;
627 len = sizeof(psinfo->pr_psargs) - 1;
628 if (sysctl(name, 4, psinfo->pr_psargs, &len, NULL, 0) == 0 && len > 0) {
629 cp = psinfo->pr_psargs;
632 cp = memchr(cp, '\0', end - cp);
638 strlcpy(psinfo->pr_psargs, kip.ki_comm,
639 sizeof(psinfo->pr_psargs));
640 psinfo->pr_pid = pid;
642 *sizep = sizeof(*psinfo);
647 elf_note_prstatus(void *arg, size_t *sizep)
650 elfcore_prstatus_t *status;
653 tid = *(lwpid_t *)arg;
654 status = calloc(1, sizeof(*status));
656 errx(1, "out of memory");
657 status->pr_version = PRSTATUS_VERSION;
658 status->pr_statussz = sizeof(*status);
659 status->pr_gregsetsz = sizeof(elfcore_gregset_t);
660 status->pr_fpregsetsz = sizeof(elfcore_fpregset_t);
661 status->pr_osreldate = __FreeBSD_version;
662 status->pr_pid = tid;
663 ptrace(PT_GETREGS, tid, (void *)&greg, 0);
664 elf_convert_gregset(&status->pr_reg, &greg);
666 *sizep = sizeof(*status);
671 elf_note_fpregset(void *arg, size_t *sizep)
674 elfcore_fpregset_t *fpregset;
677 tid = *(lwpid_t *)arg;
678 fpregset = calloc(1, sizeof(*fpregset));
679 if (fpregset == NULL)
680 errx(1, "out of memory");
681 ptrace(PT_GETFPREGS, tid, (void *)&fpreg, 0);
682 elf_convert_fpregset(fpregset, &fpreg);
684 *sizep = sizeof(*fpregset);
689 elf_note_thrmisc(void *arg, size_t *sizep)
692 struct ptrace_lwpinfo lwpinfo;
695 tid = *(lwpid_t *)arg;
696 thrmisc = calloc(1, sizeof(*thrmisc));
698 errx(1, "out of memory");
699 ptrace(PT_LWPINFO, tid, (void *)&lwpinfo,
701 memset(&thrmisc->_pad, 0, sizeof(thrmisc->_pad));
702 strcpy(thrmisc->pr_tname, lwpinfo.pl_tdname);
704 *sizep = sizeof(*thrmisc);
709 elf_note_ptlwpinfo(void *arg, size_t *sizep)
712 elfcore_lwpinfo_t *elf_info;
713 struct ptrace_lwpinfo lwpinfo;
716 tid = *(lwpid_t *)arg;
717 p = calloc(1, sizeof(int) + sizeof(elfcore_lwpinfo_t));
719 errx(1, "out of memory");
720 *(int *)p = sizeof(elfcore_lwpinfo_t);
721 elf_info = (void *)((int *)p + 1);
722 ptrace(PT_LWPINFO, tid, (void *)&lwpinfo, sizeof(lwpinfo));
723 elf_convert_lwpinfo(elf_info, &lwpinfo);
725 *sizep = sizeof(int) + sizeof(struct ptrace_lwpinfo);
731 elf_note_arm_vfp(void *arg, size_t *sizep)
735 static bool has_vfp = true;
738 tid = *(lwpid_t *)arg;
740 if (ptrace(PT_GETVFPREGS, tid, (void *)&info, 0) != 0)
747 vfp = calloc(1, sizeof(*vfp));
748 memcpy(vfp, &info, sizeof(*vfp));
749 *sizep = sizeof(*vfp);
754 #if defined(__i386__) || defined(__amd64__)
756 elf_note_x86_xstate(void *arg, size_t *sizep)
760 static bool xsave_checked = false;
761 static struct ptrace_xstate_info info;
763 tid = *(lwpid_t *)arg;
764 if (!xsave_checked) {
765 if (ptrace(PT_GETXSTATE_INFO, tid, (void *)&info,
768 xsave_checked = true;
770 if (info.xsave_len == 0) {
774 xstate = calloc(1, info.xsave_len);
775 ptrace(PT_GETXSTATE, tid, xstate, 0);
776 *(uint64_t *)(xstate + X86_XSTATE_XCR0_OFFSET) = info.xsave_mask;
777 *sizep = info.xsave_len;
782 #if defined(__powerpc__)
784 elf_note_powerpc_vmx(void *arg, size_t *sizep)
788 static bool has_vmx = true;
791 tid = *(lwpid_t *)arg;
793 if (ptrace(PT_GETVRREGS, tid, (void *)&info,
801 vmx = calloc(1, sizeof(*vmx));
802 memcpy(vmx, &info, sizeof(*vmx));
803 *sizep = sizeof(*vmx);
809 procstat_sysctl(void *arg, int what, size_t structsz, size_t *sizep)
813 int name[4], structsize;
817 structsize = structsz;
823 if (sysctl(name, 4, NULL, &len, NULL, 0) == -1)
824 err(1, "kern.proc.%d.%u", what, pid);
825 buf = calloc(1, sizeof(structsize) + len * 4 / 3);
827 errx(1, "out of memory");
828 bcopy(&structsize, buf, sizeof(structsize));
829 p = (char *)buf + sizeof(structsize);
830 if (sysctl(name, 4, p, &len, NULL, 0) == -1)
831 err(1, "kern.proc.%d.%u", what, pid);
833 *sizep = sizeof(structsize) + len;
838 elf_note_procstat_proc(void *arg, size_t *sizep)
841 return (procstat_sysctl(arg, KERN_PROC_PID | KERN_PROC_INC_THREAD,
842 sizeof(struct kinfo_proc), sizep));
846 elf_note_procstat_files(void *arg, size_t *sizep)
849 return (procstat_sysctl(arg, KERN_PROC_FILEDESC,
850 sizeof(struct kinfo_file), sizep));
854 elf_note_procstat_vmmap(void *arg, size_t *sizep)
857 return (procstat_sysctl(arg, KERN_PROC_VMMAP,
858 sizeof(struct kinfo_vmentry), sizep));
862 elf_note_procstat_groups(void *arg, size_t *sizep)
865 return (procstat_sysctl(arg, KERN_PROC_GROUPS, sizeof(gid_t), sizep));
869 elf_note_procstat_umask(void *arg, size_t *sizep)
872 return (procstat_sysctl(arg, KERN_PROC_UMASK, sizeof(u_short), sizep));
876 elf_note_procstat_osrel(void *arg, size_t *sizep)
879 return (procstat_sysctl(arg, KERN_PROC_OSREL, sizeof(int), sizep));
883 elf_note_procstat_psstrings(void *arg, size_t *sizep)
886 return (procstat_sysctl(arg, KERN_PROC_PS_STRINGS,
887 sizeof(vm_offset_t), sizep));
891 elf_note_procstat_auxv(void *arg, size_t *sizep)
894 return (procstat_sysctl(arg, KERN_PROC_AUXV,
895 sizeof(Elf_Auxinfo), sizep));
899 elf_note_procstat_rlimit(void *arg, size_t *sizep)
903 int i, name[5], structsize;
907 structsize = sizeof(struct rlimit) * RLIM_NLIMITS;
908 buf = calloc(1, sizeof(structsize) + structsize);
910 errx(1, "out of memory");
911 bcopy(&structsize, buf, sizeof(structsize));
912 p = (char *)buf + sizeof(structsize);
915 name[2] = KERN_PROC_RLIMIT;
917 len = sizeof(struct rlimit);
918 for (i = 0; i < RLIM_NLIMITS; i++) {
920 if (sysctl(name, 5, p, &len, NULL, 0) == -1)
921 err(1, "kern.proc.rlimit.%u", pid);
922 if (len != sizeof(struct rlimit))
923 errx(1, "kern.proc.rlimit.%u: short read", pid);
927 *sizep = sizeof(structsize) + structsize;
931 struct dumpers __elfN(dump) = { elf_ident, elf_coredump };
932 TEXT_SET(dumpset, __elfN(dump));