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Install the userland signal trampoline when sigaction is first called,

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instead of on startup.  This fixes binary compatibility of dynamically
linked binaries from before the signal code move.

Suggested by:	wollman (a long time ago)
This commit is contained in:
Jake Burkholder 2002-09-03 14:55:29 +00:00
parent 35c32a76f9
commit 89172e2e25
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=102899
2 changed files with 50 additions and 1 deletions
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2
lib/libc/sparc64/sys/Makefile.inc
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@ -12,7 +12,7 @@ SRCS+= __sparc_sigtramp_setup.c \
CFLAGS+= -I${.CURDIR}/sparc64/fpu
MDASM+= brk.S cerror.S exect.S pipe.S ptrace.S sbrk.S setlogin.S
MDASM+= brk.S cerror.S exect.S pipe.S ptrace.S sbrk.S setlogin.S sigaction.S
# Don't generate default code for these syscalls:
NOASM= break.o exit.o ftruncate.o getdomainname.o getlogin.o \

49
lib/libc/sparc64/sys/sigaction.S Normal file
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@ -0,0 +1,49 @@
/*-
* Copyright (c) 2002 Jake Burkholder.
* 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
__FBSDID("$FreeBSD$");
#include "SYS.h"
_SYSENTRY(sigaction)
PIC_PROLOGUE(%o3, %o4)
SET(sigcode_installed, %o4, %o3)
lduw [%o3], %o4
brnz,a,pt %o4, 1f
nop
save %sp, -CCFSZ, %sp
call __sparc_sigtramp_setup
nop
restore
mov 1, %o4
stw %o4, [%o3]
1: _SYSCALL(sigaction)
retl
nop
_SYSEND(sigaction)
.comm sigcode_installed, 4, 4