2 * SPDX-License-Identifier: BSD-2-Clause
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>
62 * Code for generating ELF core dumps.
66 struct map_entry *next;
72 typedef void (*segment_callback)(struct map_entry *, void *);
74 /* Closure for cb_put_phdr(). */
76 Elf_Phdr *phdr; /* Program header to fill in */
77 Elf_Off offset; /* Offset of segment in core file */
80 /* Closure for cb_size_segment(). */
82 int count; /* Count of writable segments. */
83 size_t size; /* Total size of all writable segments. */
86 #ifdef ELFCORE_COMPAT_32
87 typedef struct prpsinfo32 elfcore_prpsinfo_t;
89 typedef prpsinfo_t elfcore_prpsinfo_t;
92 typedef void* (*notefunc_t)(void *, size_t *);
94 static void cb_put_phdr(struct map_entry *, void *);
95 static void cb_size_segment(struct map_entry *, void *);
96 static void each_dumpable_segment(struct map_entry *, segment_callback,
98 static void elf_detach(void); /* atexit() handler. */
99 static void *elf_note_prpsinfo(void *, size_t *);
100 #if defined(__i386__) || defined(__amd64__)
101 static void *elf_note_x86_xstate(void *, size_t *);
103 #if defined(__powerpc__)
104 static void *elf_note_powerpc_vmx(void *, size_t *);
105 static void *elf_note_powerpc_vsx(void *, size_t *);
107 static void *elf_note_procstat_auxv(void *, size_t *);
108 static void *elf_note_procstat_files(void *, size_t *);
109 static void *elf_note_procstat_groups(void *, size_t *);
110 static void *elf_note_procstat_osrel(void *, size_t *);
111 static void *elf_note_procstat_proc(void *, size_t *);
112 static void *elf_note_procstat_psstrings(void *, size_t *);
113 static void *elf_note_procstat_rlimit(void *, size_t *);
114 static void *elf_note_procstat_umask(void *, size_t *);
115 static void *elf_note_procstat_vmmap(void *, size_t *);
116 static void elf_puthdr(int, pid_t, struct map_entry *, void *, size_t, size_t,
118 static void elf_putnote(int, notefunc_t, void *, struct sbuf *);
119 static void elf_putnotes(pid_t, struct sbuf *, size_t *);
120 static void elf_putregnote(int, lwpid_t, struct sbuf *);
121 static void freemap(struct map_entry *);
122 static struct map_entry *readmap(pid_t);
123 static void *procstat_sysctl(void *, int, size_t, size_t *sizep);
125 static pid_t g_pid; /* Pid being dumped, global for elf_detach */
126 static int g_status; /* proc status after ptrace attach */
129 elf_ident(int efd, pid_t pid __unused, char *binfile __unused)
135 cnt = read(efd, &hdr, sizeof(hdr));
136 if (cnt != sizeof(hdr))
140 switch (hdr.e_ident[EI_DATA]) {
142 machine = le16toh(hdr.e_machine);
145 machine = be16toh(hdr.e_machine);
150 if (!ELF_MACHINE_OK(machine))
164 * Forward any pending signals. SIGSTOP is generated by ptrace
165 * itself, so ignore it.
167 sig = WIFSTOPPED(g_status) ? WSTOPSIG(g_status) : 0;
170 ptrace(PT_DETACH, g_pid, (caddr_t)1, sig);
175 * Write an ELF coredump for the given pid to the given fd.
178 elf_coredump(int efd, int fd, pid_t pid)
180 struct map_entry *map;
181 struct sseg_closure seginfo;
184 size_t hdrsize, notesz, segoff;
189 /* Attach to process to dump. */
191 if (atexit(elf_detach) != 0)
194 ptrace(PT_ATTACH, pid, NULL, 0);
197 if (waitpid(pid, &g_status, 0) == -1)
200 /* Get the program's memory map. */
203 /* Size the program segments. */
206 each_dumpable_segment(map, cb_size_segment, &seginfo);
209 * Build the header and the notes using sbuf and write to the file.
211 sb = sbuf_new_auto();
212 hdrsize = sizeof(Elf_Ehdr) + sizeof(Elf_Phdr) * (1 + seginfo.count);
213 if (seginfo.count + 1 >= PN_XNUM)
214 hdrsize += sizeof(Elf_Shdr);
215 /* Start header + notes section. */
216 sbuf_start_section(sb, NULL);
217 /* Make empty header subsection. */
218 sbuf_start_section(sb, &old_len);
220 sbuf_end_section(sb, old_len, hdrsize, 0);
222 elf_putnotes(pid, sb, ¬esz);
223 /* Align up to a page boundary for the program segments. */
224 sbuf_end_section(sb, -1, getpagesize(), 0);
225 if (sbuf_finish(sb) != 0)
226 err(1, "sbuf_finish");
228 segoff = sbuf_len(sb);
229 /* Fill in the header. */
230 elf_puthdr(efd, pid, map, hdr, hdrsize, notesz, segoff, seginfo.count);
232 n = write(fd, hdr, segoff);
236 errx(1, "short write");
238 /* Write the contents of all of the writable segments. */
239 php = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr)) + 1;
240 for (i = 0; i < seginfo.count; i++) {
241 struct ptrace_io_desc iorequest;
242 uintmax_t nleft = php->p_filesz;
244 iorequest.piod_op = PIOD_READ_D;
245 iorequest.piod_offs = (caddr_t)(uintptr_t)php->p_vaddr;
251 if (nleft > sizeof(buf))
255 iorequest.piod_addr = buf;
256 iorequest.piod_len = nwant;
257 ptrace(PT_IO, pid, (caddr_t)&iorequest, 0);
258 ngot = iorequest.piod_len;
259 if ((size_t)ngot < nwant)
260 errx(1, "short read wanted %zu, got %zd",
262 ngot = write(fd, buf, nwant);
264 err(1, "write of segment %d failed", i);
265 if ((size_t)ngot != nwant)
266 errx(1, "short write");
268 iorequest.piod_offs += ngot;
277 * A callback for each_dumpable_segment() to write out the segment's
278 * program header entry.
281 cb_put_phdr(struct map_entry *entry, void *closure)
283 struct phdr_closure *phc = (struct phdr_closure *)closure;
284 Elf_Phdr *phdr = phc->phdr;
287 page_size = getpagesize();
288 phc->offset = roundup2(phc->offset, page_size);
290 phdr->p_type = PT_LOAD;
291 phdr->p_offset = phc->offset;
292 phdr->p_vaddr = entry->start;
294 phdr->p_filesz = phdr->p_memsz = entry->end - entry->start;
295 phdr->p_align = page_size;
297 if (entry->protection & VM_PROT_READ)
298 phdr->p_flags |= PF_R;
299 if (entry->protection & VM_PROT_WRITE)
300 phdr->p_flags |= PF_W;
301 if (entry->protection & VM_PROT_EXECUTE)
302 phdr->p_flags |= PF_X;
304 phc->offset += phdr->p_filesz;
309 * A callback for each_dumpable_segment() to gather information about
310 * the number of segments and their total size.
313 cb_size_segment(struct map_entry *entry, void *closure)
315 struct sseg_closure *ssc = (struct sseg_closure *)closure;
318 ssc->size += entry->end - entry->start;
322 * For each segment in the given memory map, call the given function
323 * with a pointer to the map entry and some arbitrary caller-supplied
327 each_dumpable_segment(struct map_entry *map, segment_callback func,
330 struct map_entry *entry;
332 for (entry = map; entry != NULL; entry = entry->next)
333 (*func)(entry, closure);
337 elf_putnotes(pid_t pid, struct sbuf *sb, size_t *sizep)
340 size_t threads, old_len;
345 threads = ptrace(PT_GETNUMLWPS, pid, NULL, 0);
347 err(1, "PT_GETNUMLWPS");
348 tids = malloc(threads * sizeof(*tids));
350 errx(1, "out of memory");
352 ptrace(PT_GETLWPLIST, pid, (void *)tids, threads);
354 err(1, "PT_GETLWPLIST");
356 sbuf_start_section(sb, &old_len);
357 elf_putnote(NT_PRPSINFO, elf_note_prpsinfo, &pid, sb);
359 for (i = 0; i < threads; ++i) {
360 elf_putregnote(NT_PRSTATUS, tids[i], sb);
361 elf_putregnote(NT_FPREGSET, tids[i], sb);
362 elf_putregnote(NT_THRMISC, tids[i], sb);
363 elf_putregnote(NT_PTLWPINFO, tids[i], sb);
364 #if defined(__aarch64__) || defined(__arm__)
365 elf_putregnote(NT_ARM_TLS, tids[i], sb);
367 #if (defined(ELFCORE_COMPAT_32) && defined(__aarch64__)) || defined(__arm__)
368 elf_putregnote(NT_ARM_VFP, tids[i], sb);
370 #if defined(__i386__) || defined(__amd64__)
371 elf_putregnote(NT_X86_SEGBASES, tids[i], sb);
372 elf_putnote(NT_X86_XSTATE, elf_note_x86_xstate, tids + i, sb);
374 #if defined(__powerpc__)
375 elf_putnote(NT_PPC_VMX, elf_note_powerpc_vmx, tids + i, sb);
377 elf_putnote(NT_PPC_VSX, elf_note_powerpc_vsx, tids + i, sb);
382 #ifndef ELFCORE_COMPAT_32
383 elf_putnote(NT_PROCSTAT_PROC, elf_note_procstat_proc, &pid, sb);
384 elf_putnote(NT_PROCSTAT_FILES, elf_note_procstat_files, &pid, sb);
385 elf_putnote(NT_PROCSTAT_VMMAP, elf_note_procstat_vmmap, &pid, sb);
386 elf_putnote(NT_PROCSTAT_GROUPS, elf_note_procstat_groups, &pid, sb);
387 elf_putnote(NT_PROCSTAT_UMASK, elf_note_procstat_umask, &pid, sb);
388 elf_putnote(NT_PROCSTAT_RLIMIT, elf_note_procstat_rlimit, &pid, sb);
389 elf_putnote(NT_PROCSTAT_OSREL, elf_note_procstat_osrel, &pid, sb);
390 elf_putnote(NT_PROCSTAT_PSSTRINGS, elf_note_procstat_psstrings, &pid,
392 elf_putnote(NT_PROCSTAT_AUXV, elf_note_procstat_auxv, &pid, sb);
395 size = sbuf_end_section(sb, old_len, 1, 0);
397 err(1, "sbuf_end_section");
403 * Emit one register set note section to sbuf.
406 elf_putregnote(int type, lwpid_t tid, struct sbuf *sb)
414 if (ptrace(PT_GETREGSET, tid, (void *)&iov, type) != 0)
416 iov.iov_base = calloc(1, iov.iov_len);
417 if (iov.iov_base == NULL)
418 errx(1, "out of memory");
419 if (ptrace(PT_GETREGSET, tid, (void *)&iov, type) != 0)
420 errx(1, "failed to fetch register set %d", type);
422 note.n_namesz = 8; /* strlen("FreeBSD") + 1 */
423 note.n_descsz = iov.iov_len;
426 sbuf_bcat(sb, ¬e, sizeof(note));
427 sbuf_start_section(sb, &old_len);
428 sbuf_bcat(sb, "FreeBSD", note.n_namesz);
429 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
430 sbuf_start_section(sb, &old_len);
431 sbuf_bcat(sb, iov.iov_base, iov.iov_len);
432 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
437 * Emit one note section to sbuf.
440 elf_putnote(int type, notefunc_t notefunc, void *arg, struct sbuf *sb)
447 desc = notefunc(arg, &descsz);
448 note.n_namesz = 8; /* strlen("FreeBSD") + 1 */
449 note.n_descsz = descsz;
452 sbuf_bcat(sb, ¬e, sizeof(note));
453 sbuf_start_section(sb, &old_len);
454 sbuf_bcat(sb, "FreeBSD", note.n_namesz);
455 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
458 sbuf_start_section(sb, &old_len);
459 sbuf_bcat(sb, desc, descsz);
460 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0);
465 * Generate the ELF coredump header.
468 elf_puthdr(int efd, pid_t pid, struct map_entry *map, void *hdr, size_t hdrsize,
469 size_t notesz, size_t segoff, int numsegs)
471 Elf_Ehdr *ehdr, binhdr;
474 struct phdr_closure phc;
477 cnt = read(efd, &binhdr, sizeof(binhdr));
479 err(1, "Failed to re-read ELF header");
480 else if (cnt != sizeof(binhdr))
481 errx(1, "Failed to re-read ELF header");
483 ehdr = (Elf_Ehdr *)hdr;
485 ehdr->e_ident[EI_MAG0] = ELFMAG0;
486 ehdr->e_ident[EI_MAG1] = ELFMAG1;
487 ehdr->e_ident[EI_MAG2] = ELFMAG2;
488 ehdr->e_ident[EI_MAG3] = ELFMAG3;
489 ehdr->e_ident[EI_CLASS] = ELF_CLASS;
490 ehdr->e_ident[EI_DATA] = ELF_DATA;
491 ehdr->e_ident[EI_VERSION] = EV_CURRENT;
492 ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
493 ehdr->e_ident[EI_ABIVERSION] = 0;
494 ehdr->e_ident[EI_PAD] = 0;
495 ehdr->e_type = ET_CORE;
496 ehdr->e_machine = binhdr.e_machine;
497 ehdr->e_version = EV_CURRENT;
499 ehdr->e_phoff = sizeof(Elf_Ehdr);
500 ehdr->e_flags = binhdr.e_flags;
501 ehdr->e_ehsize = sizeof(Elf_Ehdr);
502 ehdr->e_phentsize = sizeof(Elf_Phdr);
503 ehdr->e_shentsize = sizeof(Elf_Shdr);
504 ehdr->e_shstrndx = SHN_UNDEF;
505 if (numsegs + 1 < PN_XNUM) {
506 ehdr->e_phnum = numsegs + 1;
509 ehdr->e_phnum = PN_XNUM;
512 ehdr->e_shoff = ehdr->e_phoff +
513 (numsegs + 1) * ehdr->e_phentsize;
515 shdr = (Elf_Shdr *)((char *)hdr + ehdr->e_shoff);
516 memset(shdr, 0, sizeof(*shdr));
518 * A special first section is used to hold large segment and
519 * section counts. This was proposed by Sun Microsystems in
520 * Solaris and has been adopted by Linux; the standard ELF
521 * tools are already familiar with the technique.
523 * See table 7-7 of the Solaris "Linker and Libraries Guide"
524 * (or 12-7 depending on the version of the document) for more
527 shdr->sh_type = SHT_NULL;
528 shdr->sh_size = ehdr->e_shnum;
529 shdr->sh_link = ehdr->e_shstrndx;
530 shdr->sh_info = numsegs + 1;
534 * Fill in the program header entries.
536 phdr = (Elf_Phdr *)((char *)hdr + ehdr->e_phoff);
538 /* The note segment. */
539 phdr->p_type = PT_NOTE;
540 phdr->p_offset = hdrsize;
543 phdr->p_filesz = notesz;
545 phdr->p_flags = PF_R;
546 phdr->p_align = sizeof(Elf32_Size);
549 /* All the writable segments from the program. */
552 each_dumpable_segment(map, cb_put_phdr, &phc);
556 * Free the memory map.
559 freemap(struct map_entry *map)
561 struct map_entry *next;
563 while (map != NULL) {
571 * Read the process's memory map using kinfo_getvmmap(), and return a list of
572 * VM map entries. Only the non-device read/writable segments are
573 * returned. The map entries in the list aren't fully filled in; only
574 * the items we need are present.
576 static struct map_entry *
579 struct map_entry *ent, **linkp, *map;
580 struct kinfo_vmentry *vmentl, *kve;
583 vmentl = kinfo_getvmmap(pid, &nitems);
585 err(1, "cannot retrieve mappings for %u process", pid);
589 for (i = 0; i < nitems; i++) {
593 * Ignore 'malformed' segments or ones representing memory
594 * mapping with MAP_NOCORE on.
595 * If the 'full' support is disabled, just dump the most
596 * meaningful data segments.
598 if ((kve->kve_protection & KVME_PROT_READ) == 0 ||
599 (kve->kve_flags & KVME_FLAG_NOCOREDUMP) != 0 ||
600 kve->kve_type == KVME_TYPE_DEAD ||
601 kve->kve_type == KVME_TYPE_UNKNOWN ||
602 ((pflags & PFLAGS_FULL) == 0 &&
603 kve->kve_type != KVME_TYPE_DEFAULT &&
604 kve->kve_type != KVME_TYPE_VNODE &&
605 kve->kve_type != KVME_TYPE_SWAP &&
606 kve->kve_type != KVME_TYPE_PHYS))
609 ent = calloc(1, sizeof(*ent));
611 errx(1, "out of memory");
612 ent->start = (vm_offset_t)kve->kve_start;
613 ent->end = (vm_offset_t)kve->kve_end;
614 ent->protection = VM_PROT_READ;
615 if ((kve->kve_protection & KVME_PROT_WRITE) != 0)
616 ent->protection |= VM_PROT_WRITE;
617 if ((kve->kve_protection & KVME_PROT_EXEC) != 0)
618 ent->protection |= VM_PROT_EXECUTE;
628 * Miscellaneous note out functions.
632 elf_note_prpsinfo(void *arg, size_t *sizep)
636 elfcore_prpsinfo_t *psinfo;
637 struct kinfo_proc kip;
642 psinfo = calloc(1, sizeof(*psinfo));
644 errx(1, "out of memory");
645 psinfo->pr_version = PRPSINFO_VERSION;
646 psinfo->pr_psinfosz = sizeof(*psinfo);
650 name[2] = KERN_PROC_PID;
653 if (sysctl(name, 4, &kip, &len, NULL, 0) == -1)
654 err(1, "kern.proc.pid.%u", pid);
655 if (kip.ki_pid != pid)
656 err(1, "kern.proc.pid.%u", pid);
657 strlcpy(psinfo->pr_fname, kip.ki_comm, sizeof(psinfo->pr_fname));
658 name[2] = KERN_PROC_ARGS;
659 len = sizeof(psinfo->pr_psargs) - 1;
660 if (sysctl(name, 4, psinfo->pr_psargs, &len, NULL, 0) == 0 && len > 0) {
661 cp = psinfo->pr_psargs;
664 cp = memchr(cp, '\0', end - cp);
670 strlcpy(psinfo->pr_psargs, kip.ki_comm,
671 sizeof(psinfo->pr_psargs));
672 psinfo->pr_pid = pid;
674 *sizep = sizeof(*psinfo);
678 #if defined(__i386__) || defined(__amd64__)
680 elf_note_x86_xstate(void *arg, size_t *sizep)
684 static bool xsave_checked = false;
685 static struct ptrace_xstate_info info;
687 tid = *(lwpid_t *)arg;
688 if (!xsave_checked) {
689 if (ptrace(PT_GETXSTATE_INFO, tid, (void *)&info,
692 xsave_checked = true;
694 if (info.xsave_len == 0) {
698 xstate = calloc(1, info.xsave_len);
699 ptrace(PT_GETXSTATE, tid, xstate, 0);
700 *(uint64_t *)(xstate + X86_XSTATE_XCR0_OFFSET) = info.xsave_mask;
701 *sizep = info.xsave_len;
706 #if defined(__powerpc__)
708 elf_note_powerpc_vmx(void *arg, size_t *sizep)
712 static bool has_vmx = true;
715 tid = *(lwpid_t *)arg;
717 if (ptrace(PT_GETVRREGS, tid, (void *)&info,
725 vmx = calloc(1, sizeof(*vmx));
726 memcpy(vmx, &info, sizeof(*vmx));
727 *sizep = sizeof(*vmx);
732 elf_note_powerpc_vsx(void *arg, size_t *sizep)
736 static bool has_vsx = true;
739 tid = *(lwpid_t *)arg;
741 if (ptrace(PT_GETVSRREGS, tid, (void *)vshr,
749 vshr_data = calloc(1, sizeof(vshr));
750 memcpy(vshr_data, vshr, sizeof(vshr));
751 *sizep = sizeof(vshr);
757 procstat_sysctl(void *arg, int what, size_t structsz, size_t *sizep)
761 int name[4], structsize;
765 structsize = structsz;
771 if (sysctl(name, 4, NULL, &len, NULL, 0) == -1)
772 err(1, "kern.proc.%d.%u", what, pid);
773 buf = calloc(1, sizeof(structsize) + len * 4 / 3);
775 errx(1, "out of memory");
776 bcopy(&structsize, buf, sizeof(structsize));
777 p = (char *)buf + sizeof(structsize);
778 if (sysctl(name, 4, p, &len, NULL, 0) == -1)
779 err(1, "kern.proc.%d.%u", what, pid);
781 *sizep = sizeof(structsize) + len;
786 elf_note_procstat_proc(void *arg, size_t *sizep)
789 return (procstat_sysctl(arg, KERN_PROC_PID | KERN_PROC_INC_THREAD,
790 sizeof(struct kinfo_proc), sizep));
794 elf_note_procstat_files(void *arg, size_t *sizep)
797 return (procstat_sysctl(arg, KERN_PROC_FILEDESC,
798 sizeof(struct kinfo_file), sizep));
802 elf_note_procstat_vmmap(void *arg, size_t *sizep)
805 return (procstat_sysctl(arg, KERN_PROC_VMMAP,
806 sizeof(struct kinfo_vmentry), sizep));
810 elf_note_procstat_groups(void *arg, size_t *sizep)
813 return (procstat_sysctl(arg, KERN_PROC_GROUPS, sizeof(gid_t), sizep));
817 elf_note_procstat_umask(void *arg, size_t *sizep)
820 return (procstat_sysctl(arg, KERN_PROC_UMASK, sizeof(u_short), sizep));
824 elf_note_procstat_osrel(void *arg, size_t *sizep)
827 return (procstat_sysctl(arg, KERN_PROC_OSREL, sizeof(int), sizep));
831 elf_note_procstat_psstrings(void *arg, size_t *sizep)
834 return (procstat_sysctl(arg, KERN_PROC_PS_STRINGS,
835 sizeof(vm_offset_t), sizep));
839 elf_note_procstat_auxv(void *arg, size_t *sizep)
842 return (procstat_sysctl(arg, KERN_PROC_AUXV,
843 sizeof(Elf_Auxinfo), sizep));
847 elf_note_procstat_rlimit(void *arg, size_t *sizep)
851 int i, name[5], structsize;
855 structsize = sizeof(struct rlimit) * RLIM_NLIMITS;
856 buf = calloc(1, sizeof(structsize) + structsize);
858 errx(1, "out of memory");
859 bcopy(&structsize, buf, sizeof(structsize));
860 p = (char *)buf + sizeof(structsize);
863 name[2] = KERN_PROC_RLIMIT;
865 len = sizeof(struct rlimit);
866 for (i = 0; i < RLIM_NLIMITS; i++) {
868 if (sysctl(name, 5, p, &len, NULL, 0) == -1)
869 err(1, "kern.proc.rlimit.%u", pid);
870 if (len != sizeof(struct rlimit))
871 errx(1, "kern.proc.rlimit.%u: short read", pid);
875 *sizep = sizeof(structsize) + structsize;
879 struct dumpers __elfN(dump) = { elf_ident, elf_coredump };
880 TEXT_SET(dumpset, __elfN(dump));