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Define stack_t in sys/_sigaltstack.h

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The sigaltstack(2) definition needs this type so make it available
without all of sys/signal.h.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D44383
This commit is contained in:
Brooks Davis 2024-03-19 00:24:37 +00:00
parent a1e516a731
commit fba329a195
2 changed files with 66 additions and 23 deletions
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65
sys/sys/_sigaltstack.h Normal file
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@ -0,0 +1,65 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1982, 1986, 1989, 1991, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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.
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
#ifndef _SYS__SIGALTSTACK_H_
#define _SYS__SIGALTSTACK_H_
#include <sys/_types.h>
#if __XSI_VISIBLE
#if __BSD_VISIBLE
#define __stack_t sigaltstack
#endif
typedef struct __stack_t stack_t;
#define SS_ONSTACK 0x0001 /* take signal on alternate stack */
#define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
#define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */
#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
#endif
/*
* Structure used in sigaltstack call. Its definition is always
* needed for __ucontext. If __BSD_VISIBLE is defined, the structure
* tag is actually sigaltstack.
*/
struct __stack_t {
void *ss_sp; /* signal stack base */
__size_t ss_size; /* signal stack length */
int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
};
#endif /* !_SYS__SIGALTSTACK_H_ */

24
sys/sys/signal.h
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@ -40,6 +40,7 @@
#include <sys/cdefs.h>
#include <sys/_types.h>
#include <sys/_sigset.h>
#include <sys/_sigaltstack.h>
#include <machine/_limits.h> /* __MINSIGSTKSZ */
#include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */
@ -426,29 +427,6 @@ typedef __sighandler_t *sig_t; /* type of pointer to a signal function */
typedef void __siginfohandler_t(int, struct __siginfo *, void *);
#endif
#if __XSI_VISIBLE
#if __BSD_VISIBLE
#define __stack_t sigaltstack
#endif
typedef struct __stack_t stack_t;
#define SS_ONSTACK 0x0001 /* take signal on alternate stack */
#define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
#define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */
#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
#endif
/*
* Structure used in sigaltstack call. Its definition is always
* needed for __ucontext. If __BSD_VISIBLE is defined, the structure
* tag is actually sigaltstack.
*/
struct __stack_t {
void *ss_sp; /* signal stack base */
__size_t ss_size; /* signal stack length */
int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
};
#if __BSD_VISIBLE
/*
* 4.3 compatibility: