mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
23eeeff7be
handling clean and functional as 5.x evolves. This allows some of the nasty bandaids in the 5.x codepaths to be unwound. Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an anti-foot-shooting measure in place, 5.x folks need this for a while) and finish encapsulating the older stuff under COMPAT_43. Since the ancient stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *' to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn is supposed to take), add a compile time check to prevent foot shooting there too. Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc. Tested on: i386, alpha, ia64. Compiled on sparc64 (a few days ago). Approved by: re
114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
/*-
|
|
* Copyright (c) 1999 Marcel Moolenaar
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer
|
|
* in this position and unchanged.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_SIGFRAME_H_
|
|
#define _MACHINE_SIGFRAME_H_
|
|
|
|
/*
|
|
* Signal frames, arguments passed to application signal handlers.
|
|
*/
|
|
#ifdef _KERNEL
|
|
#ifdef COMPAT_43
|
|
struct osigframe {
|
|
/*
|
|
* The first four members may be used by applications.
|
|
*/
|
|
|
|
register_t sf_signum;
|
|
|
|
/*
|
|
* Either 'int' for old-style FreeBSD handler or 'siginfo_t *'
|
|
* pointing to sf_siginfo for SA_SIGINFO handlers.
|
|
*/
|
|
register_t sf_arg2;
|
|
|
|
/* Points to sf_siginfo.si_sc. */
|
|
register_t sf_scp;
|
|
|
|
register_t sf_addr;
|
|
|
|
/*
|
|
* The following arguments are not constrained by the
|
|
* function call protocol.
|
|
* Applications are not supposed to access these members,
|
|
* except using the pointers we provide in the first three
|
|
* arguments.
|
|
*/
|
|
|
|
union {
|
|
__osiginfohandler_t *sf_action;
|
|
__sighandler_t *sf_handler;
|
|
} sf_ahu;
|
|
|
|
/* In the SA_SIGINFO case, sf_arg2 points here. */
|
|
osiginfo_t sf_siginfo;
|
|
};
|
|
#endif
|
|
#ifdef COMPAT_FREEBSD4
|
|
/* FreeBSD 4.x */
|
|
struct sigframe4 {
|
|
register_t sf_signum;
|
|
register_t sf_siginfo; /* code or pointer to sf_si */
|
|
register_t sf_ucontext; /* points to sf_uc */
|
|
register_t sf_addr; /* undocumented 4th arg */
|
|
|
|
union {
|
|
__siginfohandler_t *sf_action;
|
|
__sighandler_t *sf_handler;
|
|
} sf_ahu;
|
|
struct ucontext4 sf_uc; /* = *sf_ucontext */
|
|
siginfo_t sf_si; /* = *sf_siginfo (SA_SIGINFO case) */
|
|
};
|
|
#endif
|
|
#endif
|
|
|
|
struct sigframe {
|
|
/*
|
|
* The first four members may be used by applications.
|
|
*
|
|
* NOTE: The 4th argument is undocumented, ill commented
|
|
* on and seems to be somewhat BSD "standard". Handlers
|
|
* installed with sigvec may be using it.
|
|
*/
|
|
register_t sf_signum;
|
|
register_t sf_siginfo; /* code or pointer to sf_si */
|
|
register_t sf_ucontext; /* points to sf_uc */
|
|
register_t sf_addr; /* undocumented 4th arg */
|
|
|
|
union {
|
|
__siginfohandler_t *sf_action;
|
|
__sighandler_t *sf_handler;
|
|
} sf_ahu;
|
|
ucontext_t sf_uc; /* = *sf_ucontext */
|
|
siginfo_t sf_si; /* = *sf_siginfo (SA_SIGINFO case) */
|
|
};
|
|
|
|
#endif /* !_MACHINE_SIGFRAME_H_ */
|