The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/kern/core_netbsd.c

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    1 /*      $NetBSD: core_netbsd.c,v 1.9 2005/02/26 21:34:55 perry Exp $    */
    2 
    3 /*
    4  * Copyright (c) 1997 Charles D. Cranor and Washington University.
    5  * Copyright (c) 1991, 1993 The Regents of the University of California.
    6  * Copyright (c) 1988 University of Utah.
    7  *
    8  * All rights reserved.
    9  *
   10  * This code is derived from software contributed to Berkeley by
   11  * the Systems Programming Group of the University of Utah Computer
   12  * Science Department.
   13  *
   14  * Redistribution and use in source and binary forms, with or without
   15  * modification, are permitted provided that the following conditions
   16  * are met:
   17  * 1. Redistributions of source code must retain the above copyright
   18  *    notice, this list of conditions and the following disclaimer.
   19  * 2. Redistributions in binary form must reproduce the above copyright
   20  *    notice, this list of conditions and the following disclaimer in the
   21  *    documentation and/or other materials provided with the distribution.
   22  * 3. All advertising materials mentioning features or use of this software
   23  *    must display the following acknowledgement:
   24  *      This product includes software developed by Charles D. Cranor,
   25  *      Washington University, the University of California, Berkeley and
   26  *      its contributors.
   27  * 4. Neither the name of the University nor the names of its contributors
   28  *    may be used to endorse or promote products derived from this software
   29  *    without specific prior written permission.
   30  *
   31  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   32  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   33  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   34  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   35  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   39  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   40  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   41  * SUCH DAMAGE.
   42  *
   43  * from: Utah $Hdr: vm_unix.c 1.1 89/11/07$
   44  *      @(#)vm_unix.c   8.1 (Berkeley) 6/11/93
   45  * from: NetBSD: uvm_unix.c,v 1.25 2001/11/10 07:37:01 lukem Exp
   46  */
   47 
   48 /*
   49  * core_netbsd.c: Support for the historic NetBSD core file format.
   50  */
   51 
   52 #include <sys/cdefs.h>
   53 __KERNEL_RCSID(0, "$NetBSD: core_netbsd.c,v 1.9 2005/02/26 21:34:55 perry Exp $");
   54 
   55 #include <sys/param.h>
   56 #include <sys/systm.h>
   57 #include <sys/proc.h>
   58 #include <sys/vnode.h>
   59 #include <sys/core.h>
   60 
   61 #include <uvm/uvm_extern.h>
   62 
   63 struct coredump_state {
   64         struct core core;
   65         off_t offset;
   66 };
   67 
   68 int     coredump_writesegs_netbsd(struct proc *, struct vnode *,
   69             struct ucred *, struct uvm_coredump_state *);
   70 
   71 int
   72 coredump_netbsd(struct lwp *l, struct vnode *vp, struct ucred *cred)
   73 {
   74         struct coredump_state cs;
   75         struct proc *p;
   76         struct vmspace *vm;
   77         int error;
   78 
   79         p = l->l_proc;
   80         vm = p->p_vmspace;
   81 
   82         cs.core.c_midmag = 0;
   83         strncpy(cs.core.c_name, p->p_comm, MAXCOMLEN);
   84         cs.core.c_nseg = 0;
   85         cs.core.c_signo = p->p_sigctx.ps_signo;
   86         cs.core.c_ucode = p->p_sigctx.ps_code;
   87         cs.core.c_cpusize = 0;
   88         cs.core.c_tsize = (u_long)ctob(vm->vm_tsize);
   89         cs.core.c_dsize = (u_long)ctob(vm->vm_dsize);
   90         cs.core.c_ssize = (u_long)round_page(ctob(vm->vm_ssize));
   91         error = cpu_coredump(l, vp, cred, &cs.core);
   92         if (error)
   93                 return (error);
   94 
   95 #if 0
   96         /*
   97          * XXX
   98          * It would be nice if we at least dumped the signal state (and made it
   99          * available at run time to the debugger, as well), but this code
  100          * hasn't actually had any effect for a long time, since we don't dump
  101          * the user area.  For now, it's dead.
  102          */
  103         memcpy(&p->p_addr->u_kproc.kp_proc, p, sizeof(struct proc));
  104         fill_eproc(p, &p->p_addr->u_kproc.kp_eproc);
  105 #endif
  106 
  107         cs.offset = cs.core.c_hdrsize + cs.core.c_seghdrsize +
  108             cs.core.c_cpusize;
  109         error = uvm_coredump_walkmap(p, vp, cred, coredump_writesegs_netbsd,
  110             &cs);
  111         if (error)
  112                 return (error);
  113 
  114         /* Now write out the core header. */
  115         error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&cs.core,
  116             (int)cs.core.c_hdrsize, (off_t)0,
  117             UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, NULL, NULL);
  118 
  119         return (error);
  120 }
  121 
  122 int
  123 coredump_writesegs_netbsd(struct proc *p, struct vnode *vp, struct ucred *cred,
  124     struct uvm_coredump_state *us)
  125 {
  126         struct coredump_state *cs = us->cookie;
  127         struct coreseg cseg;
  128         int flag, error;
  129 
  130         if (us->flags & UVM_COREDUMP_NODUMP)
  131                 return (0);
  132 
  133         if (us->flags & UVM_COREDUMP_STACK)
  134                 flag = CORE_STACK;
  135         else
  136                 flag = CORE_DATA;
  137 
  138         /*
  139          * Set up a new core file segment.
  140          */
  141         CORE_SETMAGIC(cseg, CORESEGMAGIC, CORE_GETMID(cs->core), flag);
  142         cseg.c_addr = us->start;
  143         cseg.c_size = us->end - us->start;
  144 
  145         error = vn_rdwr(UIO_WRITE, vp,
  146             (caddr_t)&cseg, cs->core.c_seghdrsize,
  147             cs->offset, UIO_SYSSPACE,
  148             IO_NODELOCKED|IO_UNIT, cred, NULL, NULL);
  149         if (error)
  150                 return (error);
  151 
  152         cs->offset += cs->core.c_seghdrsize;
  153         error = vn_rdwr(UIO_WRITE, vp,
  154             (caddr_t) us->start, (int) cseg.c_size,
  155             cs->offset, UIO_USERSPACE,
  156             IO_NODELOCKED|IO_UNIT, cred, NULL, p);
  157         if (error)
  158                 return (error);
  159 
  160         cs->offset += cseg.c_size;
  161         cs->core.c_nseg++;
  162 
  163         return (0);
  164 }

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