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 (c) 1997-2000 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #include <stdlib.h>
28 #include <unistd.h>
29 #include <errno.h>
30 #include <sys/mman.h>
31 #include "libproc.h"
32
33 /*
34 * mmap() system call -- executed by subject process
35 */
36 void *
pr_mmap(struct ps_prochandle * Pr,void * addr,size_t len,int prot,int flags,int fd,off_t off)37 pr_mmap(struct ps_prochandle *Pr,
38 void *addr, size_t len, int prot, int flags, int fd, off_t off)
39 {
40 sysret_t rval; /* return value from mmap() */
41 argdes_t argd[6]; /* arg descriptors for mmap() */
42 argdes_t *adp;
43 int error;
44
45 if (Pr == NULL) /* no subject process */
46 return (mmap(addr, len, prot, flags, fd, off));
47
48 adp = &argd[0]; /* addr argument */
49 adp->arg_value = (long)addr;
50 adp->arg_object = NULL;
51 adp->arg_type = AT_BYVAL;
52 adp->arg_inout = AI_INPUT;
53 adp->arg_size = 0;
54
55 adp++; /* len argument */
56 adp->arg_value = (long)len;
57 adp->arg_object = NULL;
58 adp->arg_type = AT_BYVAL;
59 adp->arg_inout = AI_INPUT;
60 adp->arg_size = 0;
61
62 adp++; /* prot argument */
63 adp->arg_value = (long)prot;
64 adp->arg_object = NULL;
65 adp->arg_type = AT_BYVAL;
66 adp->arg_inout = AI_INPUT;
67 adp->arg_size = 0;
68
69 adp++; /* flags argument */
70 adp->arg_value = (long)(_MAP_NEW|flags);
71 adp->arg_object = NULL;
72 adp->arg_type = AT_BYVAL;
73 adp->arg_inout = AI_INPUT;
74 adp->arg_size = 0;
75
76 adp++; /* fd argument */
77 adp->arg_value = (long)fd;
78 adp->arg_object = NULL;
79 adp->arg_type = AT_BYVAL;
80 adp->arg_inout = AI_INPUT;
81 adp->arg_size = 0;
82
83 adp++; /* off argument */
84 adp->arg_value = (long)off;
85 adp->arg_object = NULL;
86 adp->arg_type = AT_BYVAL;
87 adp->arg_inout = AI_INPUT;
88 adp->arg_size = 0;
89
90 error = Psyscall(Pr, &rval, SYS_mmap, 6, &argd[0]);
91
92 if (error) {
93 errno = (error > 0)? error : ENOSYS;
94 return ((void *)(-1));
95 }
96 return ((void *)rval.sys_rval1);
97 }
98
99 /*
100 * munmap() system call -- executed by subject process
101 */
102 int
pr_munmap(struct ps_prochandle * Pr,void * addr,size_t len)103 pr_munmap(struct ps_prochandle *Pr, void *addr, size_t len)
104 {
105 sysret_t rval; /* return value from munmap() */
106 argdes_t argd[2]; /* arg descriptors for munmap() */
107 argdes_t *adp;
108 int error;
109
110 if (Pr == NULL) /* no subject process */
111 return (munmap(addr, len));
112
113 adp = &argd[0]; /* addr argument */
114 adp->arg_value = (long)addr;
115 adp->arg_object = NULL;
116 adp->arg_type = AT_BYVAL;
117 adp->arg_inout = AI_INPUT;
118 adp->arg_size = 0;
119
120 adp++; /* len argument */
121 adp->arg_value = (long)len;
122 adp->arg_object = NULL;
123 adp->arg_type = AT_BYVAL;
124 adp->arg_inout = AI_INPUT;
125 adp->arg_size = 0;
126
127 error = Psyscall(Pr, &rval, SYS_munmap, 2, &argd[0]);
128
129 if (error) {
130 errno = (error > 0)? error : ENOSYS;
131 return (-1);
132 }
133 return (rval.sys_rval1);
134 }
135
136 /*
137 * zmap() -- convenience function; mmap(MAP_ANON) executed by subject process.
138 */
139 void *
pr_zmap(struct ps_prochandle * Pr,void * addr,size_t len,int prot,int flags)140 pr_zmap(struct ps_prochandle *Pr, void *addr, size_t len, int prot, int flags)
141 {
142 return (pr_mmap(Pr, addr, len, prot, flags | MAP_ANON, -1, (off_t)0));
143 }
144