1/*-
2 * Copyright (c) 1995-1996 S�ren Schmidt
3 * Copyright (c) 1996 Peter Wemm
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: head/sys/kern/imgact_elf.c 50717 1999-09-01 00:29:56Z julian $
30 */
31
32#include "opt_rlimit.h"
33
34#include <sys/param.h>
35#include <sys/acct.h>
36#include <sys/exec.h>
37#include <sys/fcntl.h>

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678static void elf_puthdr __P((struct proc *, void *, size_t *,
679 const prstatus_t *, const prfpregset_t *, const prpsinfo_t *, int));
680static void elf_putnote __P((void *, size_t *, const char *, int,
681 const void *, size_t));
682
683extern int osreldate;
684
685int
686elf_coredump(p, vp, limit)
687 register struct proc *p;
688 register struct vnode *vp;
689 off_t limit;
690{
691 register struct ucred *cred = p->p_cred->pc_ucred;
692 int error = 0;
693 struct sseg_closure seginfo;
694 void *hdr;
695 size_t hdrsize;
696
697 /* Size the program segments. */
698 seginfo.count = 0;
699 seginfo.size = 0;
700 each_writable_segment(p, cb_size_segment, &seginfo);
701
702 /*
703 * Calculate the size of the core file header area by making
704 * a dry run of generating it. Nothing is written, but the
705 * size is calculated.
706 */
707 hdrsize = 0;
708 elf_puthdr((struct proc *)NULL, (void *)NULL, &hdrsize,
709 (const prstatus_t *)NULL, (const prfpregset_t *)NULL,
710 (const prpsinfo_t *)NULL, seginfo.count);
711
712 if (hdrsize + seginfo.size >= limit)
713 return (EFAULT);
714
715 /*
716 * Allocate memory for building the header, fill it up,
717 * and write it out.
718 */
719 hdr = malloc(hdrsize, M_TEMP, M_WAITOK);
720 if (hdr == NULL) {
721 return EINVAL;
722 }
723 error = elf_corehdr(p, vp, cred, seginfo.count, hdr, hdrsize);
724
725 /* Write the contents of all of the writable segments. */
726 if (error == 0) {
727 Elf_Phdr *php;
728 off_t offset;
729 int i;

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736 IO_NODELOCKED|IO_UNIT, cred, (int *)NULL, p);
737 if (error != 0)
738 break;
739 offset += php->p_filesz;
740 php++;
741 }
742 }
743 free(hdr, M_TEMP);
744
745 return error;
746}
747
748/*
749 * A callback for each_writable_segment() to write out the segment's
750 * program header entry.
751 */
752static void
753cb_put_phdr(entry, closure)

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