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      1 /*	$NetBSD: core_netbsd.c,v 1.24 2019/11/20 19:37:53 pgoyette 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. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  * from: Utah $Hdr: vm_unix.c 1.1 89/11/07$
     39  *      @(#)vm_unix.c   8.1 (Berkeley) 6/11/93
     40  * from: NetBSD: uvm_unix.c,v 1.25 2001/11/10 07:37:01 lukem Exp
     41  */
     42 
     43 /*
     44  * core_netbsd.c: Support for the historic NetBSD core file format.
     45  */
     46 
     47 #include <sys/cdefs.h>
     48 __KERNEL_RCSID(0, "$NetBSD: core_netbsd.c,v 1.24 2019/11/20 19:37:53 pgoyette Exp $");
     49 
     50 #include <sys/param.h>
     51 #include <sys/systm.h>
     52 #include <sys/exec.h>
     53 #include <sys/proc.h>
     54 #include <sys/vnode.h>
     55 #include <sys/core.h>
     56 #include <sys/module.h>
     57 #include <sys/compat_stub.h>
     58 #include <sys/signalvar.h>
     59 
     60 #include <uvm/uvm_extern.h>
     61 
     62 #ifndef CORENAME
     63 #define	CORENAME(x)	x
     64 #endif
     65 #ifdef COREINC
     66 #include COREINC
     67 #endif
     68 
     69 struct coredump_state {
     70 	struct coredump_iostate *iocookie;
     71 	struct CORENAME(core) core;
     72 };
     73 
     74 static int	CORENAME(coredump_writesegs_netbsd)(struct uvm_coredump_state *);
     75 
     76 int
     77 CORENAME(real_coredump_netbsd)(struct lwp *l, struct coredump_iostate *iocookie)
     78 {
     79 	struct coredump_state cs;
     80 	struct proc *p = l->l_proc;
     81 	struct vmspace *vm = p->p_vmspace;
     82 	int error;
     83 
     84 	cs.iocookie = iocookie;
     85 	cs.core.c_midmag = 0;
     86 	strncpy(cs.core.c_name, p->p_comm, MAXCOMLEN);
     87 	cs.core.c_nseg = 0;
     88 	cs.core.c_signo = p->p_sigctx.ps_info._signo;
     89 	cs.core.c_ucode = p->p_sigctx.ps_info._code;
     90 	cs.core.c_cpusize = 0;
     91 	cs.core.c_tsize = (u_long)ctob(vm->vm_tsize);
     92 	cs.core.c_dsize = (u_long)ctob(vm->vm_dsize);
     93 	cs.core.c_ssize = (u_long)round_page(ctob(vm->vm_ssize));
     94 
     95 	error = CORENAME(cpu_coredump)(l, NULL, &cs.core);
     96 	if (error)
     97 		return (error);
     98 	MODULE_HOOK_CALL(uvm_coredump_count_segs_hook, (p), 0, cs.core.c_nseg);
     99 
    100 	/* First write out the core header. */
    101 	MODULE_HOOK_CALL(coredump_write_hook, (iocookie, UIO_SYSSPACE, &cs.core,
    102 	    cs.core.c_hdrsize), ENOSYS, error);
    103 	if (error)
    104 		return (error);
    105 
    106 	/* Then the CPU specific stuff */
    107 	error = CORENAME(cpu_coredump)(l, iocookie, &cs.core);
    108 	if (error)
    109 		return (error);
    110 
    111 	/* Finally, the address space dump */
    112 	MODULE_HOOK_CALL(uvm_coredump_walkmap_hook,
    113 	    (p, CORENAME(coredump_writesegs_netbsd), &cs), ENOSYS, error);
    114 
    115 	return error;
    116 }
    117 
    118 static int
    119 CORENAME(coredump_writesegs_netbsd)(struct uvm_coredump_state *us)
    120 {
    121 	struct coredump_state *cs = us->cookie;
    122 	struct CORENAME(coreseg) cseg;
    123 	int flag, error;
    124 
    125 	if (us->flags & UVM_COREDUMP_STACK)
    126 		flag = CORE_STACK;
    127 	else
    128 		flag = CORE_DATA;
    129 
    130 	/*
    131 	 * Set up a new core file segment.
    132 	 */
    133 	CORE_SETMAGIC(cseg, CORESEGMAGIC, CORE_GETMID(cs->core), flag);
    134 	cseg.c_addr = us->start;
    135 
    136 	if (us->start == us->realend)
    137 		/* Not really wanted, but counted... */
    138 		cseg.c_size = 0;
    139 	else
    140 		cseg.c_size = us->end - us->start;
    141 
    142 	MODULE_HOOK_CALL(coredump_write_hook, (cs->iocookie, UIO_SYSSPACE,
    143 	    &cseg, cs->core.c_seghdrsize), ENOSYS, error);
    144 	if (error)
    145 		return (error);
    146 
    147 	MODULE_HOOK_CALL(coredump_write_hook, (cs->iocookie, UIO_USERSPACE,
    148 	    (void *)(vaddr_t)us->start, cseg.c_size), ENOSYS, error);
    149 
    150 	return error;
    151 }
    152