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SIGINFO __sigaction & trampoline code.

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This commit is contained in:
pk 2003-10-12 14:42:03 +00:00
parent c2e604a45c
commit f70031fee9
3 changed files with 80 additions and 8 deletions
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4
lib/libc/arch/sparc/Makefile.inc
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@ -1,11 +1,11 @@
# $NetBSD: Makefile.inc,v 1.8 2002/10/27 18:45:11 chs Exp $
# $NetBSD: Makefile.inc,v 1.9 2003/10/12 14:42:03 pk Exp $
KMINCLUDES= arch/sparc/SYS.h
KMSRCS= bzero.S ffs.S strlen.S htonl.S htons.S \
ntohl.S ntohs.S divrem.m4 \
mul.S saveregs.S umul.S
SRCS+= __sigaction14_sigtramp.c __sigtramp1.S
SRCS+= __sigaction14_sigtramp.c __sigtramp1.S __sigtramp2.S
# `source' files built from m4 source
# the name `div.o' is taken for the ANSI C `div' function, hence sdiv here

25
lib/libc/arch/sparc/sys/__sigaction14_sigtramp.c
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@ -1,4 +1,4 @@
/* $NetBSD: __sigaction14_sigtramp.c,v 1.2 2003/01/18 11:15:08 thorpej Exp $ */
/* $NetBSD: __sigaction14_sigtramp.c,v 1.3 2003/10/12 14:42:03 pk Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
@ -40,6 +40,7 @@
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#include "extern.h"
@ -48,13 +49,25 @@ __weak_alias(__sigaction14, __libc_sigaction14)
int
__libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
{
extern int __sigtramp_sigcontext_1[];
int rv;
extern void __sigtramp_sigcontext_1(void);
extern void __sigtramp_siginfo_2(void);
/*
* Right here we should select the SA_SIGINFO trampoline
* if SA_SIGINFO is set in the sigaction.
* We select the compatibility SIGCONTEXT trampoline if SA_SIGINFO
* is not set in the sigaction.
*/
if (act && (act->sa_flags & SA_SIGINFO) == 0) {
rv = __sigaction_sigtramp(sig, act, oact,
__sigtramp_sigcontext_1, 1);
/*
* EINVAL might indicate that trampoline version 1 is
* not supported by the kernel; fall back on native
* SIGINFO trampoline.
*/
if (rv >= 0 || errno != EINVAL)
return rv;
}
return (__sigaction_sigtramp(sig, act, oact,
__sigtramp_sigcontext_1, 1));
return __sigaction_sigtramp(sig, act, oact, __sigtramp_siginfo_2, 2);
}

59
lib/libc/arch/sparc/sys/__sigtramp2.S Normal file
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@ -0,0 +1,59 @@
/* $NetBSD: __sigtramp2.S,v 1.1 2003/10/12 14:42:03 pk Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <machine/asm.h>
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: __sigtramp2.S,v 1.1 2003/10/12 14:42:03 pk Exp $")
#endif /* SYSLIBC_SCCS and not lint */
#include "SYS.h"
/*
* When this code is run, the stack looks like:
* [%sp] struct frame
* [%sp + 96] siginfo_t
* [%sp + 96 + 128] ucontext_t
* .
* .
*/
ENTRY_NOPROFILE(__sigtramp_siginfo_2)
add %sp, 96 + 128, %o0 /* get pointer to ucontext */
mov SYS_setcontext, %g1
t ST_SYSCALL /* call setcontext */
mov SYS_exit, %g1 /* exit with errno */
t ST_SYSCALL /* if sigreturn fails */