1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997-2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <stdlib.h>
28 #include <unistd.h>
29 #include <errno.h>
30 #include <sys/lwp.h>
31 #include "libproc.h"
32
33 /*
34 * exit() system call -- executed by subject process.
35 */
36 int
pr_exit(struct ps_prochandle * Pr,int status)37 pr_exit(struct ps_prochandle *Pr, int status)
38 {
39 sysret_t rval; /* return value from exit() */
40 argdes_t argd[1]; /* arg descriptors for exit() */
41 argdes_t *adp;
42 int error;
43
44 if (Pr == NULL) { /* no subject process */
45 exit(status);
46 return (0); /* not reached */
47 }
48
49 adp = &argd[0]; /* status argument */
50 adp->arg_value = status;
51 adp->arg_object = NULL;
52 adp->arg_type = AT_BYVAL;
53 adp->arg_inout = AI_INPUT;
54 adp->arg_size = 0;
55
56 error = Psyscall(Pr, &rval, SYS_exit, 1, &argd[0]);
57 /* actually -- never returns. Expect ENOENT */
58
59 if (error < 0) {
60 if (errno == ENOENT) /* expected case */
61 error = ENOENT;
62 else
63 error = ENOSYS;
64 }
65
66 if (error == 0) /* can't happen? */
67 return (rval.sys_rval1);
68
69 if (error == ENOENT) /* expected case */
70 return (0);
71
72 errno = error;
73 return (-1);
74 }
75
76 /*
77 * lwp_exit() system call -- executed by subject lwp.
78 */
79 int
pr_lwp_exit(struct ps_prochandle * Pr)80 pr_lwp_exit(struct ps_prochandle *Pr)
81 {
82 sysret_t rval; /* return value from lwp_exit() */
83 int error;
84
85 if (Pr == NULL) { /* no subject process */
86 (void) syscall(SYS_lwp_exit);
87 return (0); /* not reached */
88 }
89
90 error = Psyscall(Pr, &rval, SYS_lwp_exit, 0, NULL);
91 /* actually -- never returns. Expect ENOENT */
92
93 if (error < 0) {
94 if (errno == ENOENT) /* expected case */
95 error = ENOENT;
96 else
97 error = ENOSYS;
98 }
99
100 if (error == 0) /* can't happen? */
101 return (rval.sys_rval1);
102
103 if (error == ENOENT) /* expected case */
104 return (0);
105
106 errno = error;
107 return (-1);
108 }
109