netbsd32_core.c revision 1.3 
1/*	$NetBSD: netbsd32_core.c,v 1.3 2001/12/10 01:56:46 thorpej 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: netbsd32_core.c,v 1.3 2001/12/10 01:56:46 thorpej 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#include <compat/netbsd32/netbsd32.h>
64
65struct coredump_state {
66	struct core32 core;
67	off_t offset;
68};
69
70int	coredump_writesegs_netbsd(struct proc *, struct vnode *,
71	    struct ucred *, struct uvm_coredump_state *);
72
73int
74coredump_netbsd(struct proc *p, struct vnode *vp, struct ucred *cred)
75{
76	struct coredump_state cs;
77	struct vmspace *vm = p->p_vmspace;
78	int error;
79
80	cs.core.c_midmag = 0;
81	strncpy(cs.core.c_name, p->p_comm, MAXCOMLEN);
82	cs.core.c_nseg = 0;
83	cs.core.c_signo = p->p_sigctx.ps_sig;
84	cs.core.c_ucode = p->p_sigctx.ps_code;
85	cs.core.c_cpusize = 0;
86	cs.core.c_tsize = (u_long)ctob(vm->vm_tsize);
87	cs.core.c_dsize = (u_long)ctob(vm->vm_dsize);
88	cs.core.c_ssize = (u_long)round_page(ctob(vm->vm_ssize));
89	error = cpu_coredump32(p, vp, cred, &cs.core);
90	if (error)
91		return (error);
92
93#if 0
94	/*
95	 * XXX
96	 * It would be nice if we at least dumped the signal state (and made it
97	 * available at run time to the debugger, as well), but this code
98	 * hasn't actually had any effect for a long time, since we don't dump
99	 * the user area.  For now, it's dead.
100	 */
101	memcpy(&p->p_addr->u_kproc.kp_proc, p, sizeof(struct proc));
102	fill_eproc(p, &p->p_addr->u_kproc.kp_eproc);
103#endif
104
105	cs.offset = cs.core.c_hdrsize + cs.core.c_seghdrsize +
106	    cs.core.c_cpusize;
107	error = uvm_coredump_walkmap(p, vp, cred, coredump_writesegs_netbsd,
108	    &cs);
109	if (error)
110		return (error);
111
112	/* Now write out the core header. */
113	error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&cs.core,
114	    (int)cs.core.c_hdrsize, (off_t)0,
115	    UIO_SYSSPACE, IO_NODELOCKED|IO_UNIT, cred, NULL, p);
116
117	return (error);
118}
119
120int
121coredump_writesegs_netbsd(struct proc *p, struct vnode *vp, struct ucred *cred,
122    struct uvm_coredump_state *us)
123{
124	struct coredump_state *cs = us->cookie;
125	struct coreseg32 cseg;
126	int flag, error;
127
128	if (us->flags & UVM_COREDUMP_NODUMP)
129		return (0);
130
131	if (us->flags & UVM_COREDUMP_STACK)
132		flag = CORE_STACK;
133	else
134		flag = CORE_DATA;
135
136	/*
137	 * Set up a new core file segment.
138	 */
139	CORE_SETMAGIC(cseg, CORESEGMAGIC, CORE_GETMID(cs->core), flag);
140	cseg.c_addr = us->start;
141	cseg.c_size = us->end - us->start;
142
143	error = vn_rdwr(UIO_WRITE, vp,
144	    (caddr_t)&cseg, cs->core.c_seghdrsize,
145	    cs->offset, UIO_SYSSPACE,
146	    IO_NODELOCKED|IO_UNIT, cred, NULL, p);
147	if (error)
148		return (error);
149
150	cs->offset += cs->core.c_seghdrsize;
151	error = vn_rdwr(UIO_WRITE, vp,
152	    (caddr_t) us->start, (int) cseg.c_size,
153	    cs->offset, UIO_USERSPACE,
154	    IO_NODELOCKED|IO_UNIT, cred, NULL, p);
155	if (error)
156		return (error);
157
158	cs->offset += cseg.c_size;
159	cs->core.c_nseg++;
160
161	return (0);
162}
163