xref: /onnv-gate/usr/src/lib/libproc/common/pr_mmap.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright (c) 1997-2000 by Sun Microsystems, Inc.
24*0Sstevel@tonic-gate  * All rights reserved.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate #include <stdlib.h>
30*0Sstevel@tonic-gate #include <unistd.h>
31*0Sstevel@tonic-gate #include <errno.h>
32*0Sstevel@tonic-gate #include <sys/mman.h>
33*0Sstevel@tonic-gate #include "libproc.h"
34*0Sstevel@tonic-gate 
35*0Sstevel@tonic-gate /*
36*0Sstevel@tonic-gate  * mmap() system call -- executed by subject process
37*0Sstevel@tonic-gate  */
38*0Sstevel@tonic-gate void *
pr_mmap(struct ps_prochandle * Pr,void * addr,size_t len,int prot,int flags,int fd,off_t off)39*0Sstevel@tonic-gate pr_mmap(struct ps_prochandle *Pr,
40*0Sstevel@tonic-gate 	void *addr, size_t len, int prot, int flags, int fd, off_t off)
41*0Sstevel@tonic-gate {
42*0Sstevel@tonic-gate 	sysret_t rval;			/* return value from mmap() */
43*0Sstevel@tonic-gate 	argdes_t argd[6];		/* arg descriptors for mmap() */
44*0Sstevel@tonic-gate 	argdes_t *adp;
45*0Sstevel@tonic-gate 	int error;
46*0Sstevel@tonic-gate 
47*0Sstevel@tonic-gate 	if (Pr == NULL)		/* no subject process */
48*0Sstevel@tonic-gate 		return (mmap(addr, len, prot, flags, fd, off));
49*0Sstevel@tonic-gate 
50*0Sstevel@tonic-gate 	adp = &argd[0];		/* addr argument */
51*0Sstevel@tonic-gate 	adp->arg_value = (long)addr;
52*0Sstevel@tonic-gate 	adp->arg_object = NULL;
53*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
54*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
55*0Sstevel@tonic-gate 	adp->arg_size = 0;
56*0Sstevel@tonic-gate 
57*0Sstevel@tonic-gate 	adp++;			/* len argument */
58*0Sstevel@tonic-gate 	adp->arg_value = (long)len;
59*0Sstevel@tonic-gate 	adp->arg_object = NULL;
60*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
61*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
62*0Sstevel@tonic-gate 	adp->arg_size = 0;
63*0Sstevel@tonic-gate 
64*0Sstevel@tonic-gate 	adp++;			/* prot argument */
65*0Sstevel@tonic-gate 	adp->arg_value = (long)prot;
66*0Sstevel@tonic-gate 	adp->arg_object = NULL;
67*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
68*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
69*0Sstevel@tonic-gate 	adp->arg_size = 0;
70*0Sstevel@tonic-gate 
71*0Sstevel@tonic-gate 	adp++;			/* flags argument */
72*0Sstevel@tonic-gate 	adp->arg_value = (long)(_MAP_NEW|flags);
73*0Sstevel@tonic-gate 	adp->arg_object = NULL;
74*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
75*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
76*0Sstevel@tonic-gate 	adp->arg_size = 0;
77*0Sstevel@tonic-gate 
78*0Sstevel@tonic-gate 	adp++;			/* fd argument */
79*0Sstevel@tonic-gate 	adp->arg_value = (long)fd;
80*0Sstevel@tonic-gate 	adp->arg_object = NULL;
81*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
82*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
83*0Sstevel@tonic-gate 	adp->arg_size = 0;
84*0Sstevel@tonic-gate 
85*0Sstevel@tonic-gate 	adp++;			/* off argument */
86*0Sstevel@tonic-gate 	adp->arg_value = (long)off;
87*0Sstevel@tonic-gate 	adp->arg_object = NULL;
88*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
89*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
90*0Sstevel@tonic-gate 	adp->arg_size = 0;
91*0Sstevel@tonic-gate 
92*0Sstevel@tonic-gate 	error = Psyscall(Pr, &rval, SYS_mmap, 6, &argd[0]);
93*0Sstevel@tonic-gate 
94*0Sstevel@tonic-gate 	if (error) {
95*0Sstevel@tonic-gate 		errno = (error > 0)? error : ENOSYS;
96*0Sstevel@tonic-gate 		return ((void *)(-1));
97*0Sstevel@tonic-gate 	}
98*0Sstevel@tonic-gate 	return ((void *)rval.sys_rval1);
99*0Sstevel@tonic-gate }
100*0Sstevel@tonic-gate 
101*0Sstevel@tonic-gate /*
102*0Sstevel@tonic-gate  * munmap() system call -- executed by subject process
103*0Sstevel@tonic-gate  */
104*0Sstevel@tonic-gate int
pr_munmap(struct ps_prochandle * Pr,void * addr,size_t len)105*0Sstevel@tonic-gate pr_munmap(struct ps_prochandle *Pr, void *addr, size_t len)
106*0Sstevel@tonic-gate {
107*0Sstevel@tonic-gate 	sysret_t rval;			/* return value from munmap() */
108*0Sstevel@tonic-gate 	argdes_t argd[2];		/* arg descriptors for munmap() */
109*0Sstevel@tonic-gate 	argdes_t *adp;
110*0Sstevel@tonic-gate 	int error;
111*0Sstevel@tonic-gate 
112*0Sstevel@tonic-gate 	if (Pr == NULL)		/* no subject process */
113*0Sstevel@tonic-gate 		return (munmap(addr, len));
114*0Sstevel@tonic-gate 
115*0Sstevel@tonic-gate 	adp = &argd[0];		/* addr argument */
116*0Sstevel@tonic-gate 	adp->arg_value = (long)addr;
117*0Sstevel@tonic-gate 	adp->arg_object = NULL;
118*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
119*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
120*0Sstevel@tonic-gate 	adp->arg_size = 0;
121*0Sstevel@tonic-gate 
122*0Sstevel@tonic-gate 	adp++;			/* len argument */
123*0Sstevel@tonic-gate 	adp->arg_value = (long)len;
124*0Sstevel@tonic-gate 	adp->arg_object = NULL;
125*0Sstevel@tonic-gate 	adp->arg_type = AT_BYVAL;
126*0Sstevel@tonic-gate 	adp->arg_inout = AI_INPUT;
127*0Sstevel@tonic-gate 	adp->arg_size = 0;
128*0Sstevel@tonic-gate 
129*0Sstevel@tonic-gate 	error = Psyscall(Pr, &rval, SYS_munmap, 2, &argd[0]);
130*0Sstevel@tonic-gate 
131*0Sstevel@tonic-gate 	if (error) {
132*0Sstevel@tonic-gate 		errno = (error > 0)? error : ENOSYS;
133*0Sstevel@tonic-gate 		return (-1);
134*0Sstevel@tonic-gate 	}
135*0Sstevel@tonic-gate 	return (rval.sys_rval1);
136*0Sstevel@tonic-gate }
137*0Sstevel@tonic-gate 
138*0Sstevel@tonic-gate /*
139*0Sstevel@tonic-gate  * zmap() -- convenience function; mmap(MAP_ANON) executed by subject process.
140*0Sstevel@tonic-gate  */
141*0Sstevel@tonic-gate void *
pr_zmap(struct ps_prochandle * Pr,void * addr,size_t len,int prot,int flags)142*0Sstevel@tonic-gate pr_zmap(struct ps_prochandle *Pr, void *addr, size_t len, int prot, int flags)
143*0Sstevel@tonic-gate {
144*0Sstevel@tonic-gate 	return (pr_mmap(Pr, addr, len, prot, flags | MAP_ANON, -1, (off_t)0));
145*0Sstevel@tonic-gate }
146