lx_signum.c revision 9acbbeaf2a1ffe5c14b244867d427714fab43c5c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <lx_signum.h>
/*
* Delivering signals to a Linux process is complicated by differences in
* signal numbering, stack structure and contents, and the action taken when a
* signal handler exits. In addition, many signal-related structures, such as
* sigset_ts, vary between Solaris and Linux.
*
* The simplest transformation that must be done when sending signals is to
* translate between Linux and Solaris signal numbers.
*
* These are the major signal number differences between Linux and Solaris:
*
* ====================================
* | Number | Linux | Solaris |
* | ====== | ========= | ========== |
* | 7 | SIGBUS | SIGEMT |
* | 10 | SIGUSR1 | SIGBUS |
* | 12 | SIGUSR2 | SIGSYS |
* | 16 | SIGSTKFLT | SIGUSR1 |
* | 17 | SIGCHLD | SIGUSR2 |
* | 18 | SIGCONT | SIGCHLD |
* | 19 | SIGSTOP | SIGPWR |
* | 20 | SIGTSTP | SIGWINCH |
* | 21 | SIGTTIN | SIGURG |
* | 22 | SIGTTOU | SIGPOLL |
* | 23 | SIGURG | SIGSTOP |
* | 24 | SIGXCPU | SIGTSTP |
* | 25 | SIGXFSZ | SIGCONT |
* | 26 | SIGVTALARM | SIGTTIN |
* | 27 | SIGPROF | SIGTTOU |
* | 28 | SIGWINCH | SIGVTALARM |
* | 29 | SIGPOLL | SIGPROF |
* | 30 | SIGPWR | SIGXCPU |
* | 31 | SIGSYS | SIGXFSZ |
* ====================================
*
* Not every Linux signal maps to a Solaris signal, nor does every Solaris
* signal map to a Linux counterpart. However, when signals do map, the
* mapping is unique.
*
* One mapping issue is that Linux supports 32 real time signals, with SIGRTMIN
* typically starting at or near 32 (SIGRTMIN) and proceeding to 63 (SIGRTMAX)
* (SIGRTMIN is "at or near" 32 because glibc usually "steals" one ore more of
* these signals for its own internal use, adjusting SIGRTMIN and SIGRTMAX as
* needed.) Conversely, Solaris actively uses signals 32-40 for other purposes
* and and only supports seven real time signals, in the range 41 (SIGRTMIN)
* to 48 (SIGRTMAX).
*
* At present, attempting to translate a Linux signal greater than 39 but
* less than 62 will generate an error (we allow SIGRTMAX because a program
* should be able to send SIGRTMAX without getting an EINVAL, though obviously
* anything that loops through the signals from SIGRTMIN to SIGRTMAX will
* fail.)
*
* Similarly, attempting to translate a native Solaris signal in the range
* 32-40 will also generate an error as we don't want to support the receipt of
* those signals from the Solaris global zone.
*/
/*
* Linux to Solaris signal map
*
* Usage: solaris_signal = ltos_signum[lx_signal];
*/
const int
ltos_signo[LX_NSIG] = {
0,
SIGEMT, /* 16: Linux SIGSTKFLT; use Solaris SIGEMT */
_SIGRTMIN, /* 32: Linux SIGRTMIN */
_SIGRTMIN + 1,
_SIGRTMIN + 2,
_SIGRTMIN + 3,
_SIGRTMIN + 4,
_SIGRTMIN + 5,
_SIGRTMIN + 6,
-1, /* 38 Linux SIGRTMIN + 7 */
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1,
-1, /* 63: Linux SIGRTMIN + 32, or SIGRTMAX - 1 */
_SIGRTMAX, /* 64: Linux SIGRTMAX */
};
/*
* Solaris to Linux signal map
*
* Usage: lx_signal = stol_signo[solaris_signal];
*/
const int
stol_signo[NSIG] = {
0,
LX_SIGSTKFLT, /* 7: Solaris SIGEMT; use for LX_SIGSTKFLT */
-1, /* 32: Solaris SIGWAITING */
-1, /* 33: Solaris SIGLWP */
-1, /* 34: Solaris SIGFREEZE */
-1, /* 35: Solaris SIGTHAW */
-1, /* 36: Solaris SIGCANCEL */
-1, /* 37: Solaris SIGLOST */
-1, /* 38: Solaris SIGXRES */
-1, /* 39: Solaris SIGJVM1 */
-1, /* 40: Solaris SIGJVM2 */
LX_SIGRTMIN, /* 41: Solaris _SIGRTMIN */
LX_SIGRTMIN + 1,
LX_SIGRTMIN + 2,
LX_SIGRTMIN + 3,
LX_SIGRTMIN + 4,
LX_SIGRTMIN + 5,
LX_SIGRTMIN + 6,
LX_SIGRTMAX, /* 48: Solaris _SIGRTMAX */
};