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posix: Consolidate Linux sigsuspend implementation

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This patch consolidates the sigsuspend Linux syscall generation on
sysdeps/unix/sysv/linux/sigsuspend.c.  It basically removes the alpha
assembly version which call the old sigsusped interface using only
the first doubleword from sigset. Current minimum supported kernel
on alpha (3.2) enforces rt_sigsuspend on the architecture
(__ARCH_WANT_SYS_RT_SIGSUSPEND option on kernel), so it is possible
to use the default implementation.

Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, powerpc64le-linux-gnu,
sparc64-linux-gnu, and sparcv9-linux-gnu.

	* sysdeps/unix/sysv/linux/alpha/sigsuspend.S: Remove file.
	* sysdeps/unix/sysv/linux/sigsuspend.c: Simplify include list.
	* nptl/Makefile (CFLAGS-sigsuspend.c): New rule.
	* sysdeps/unix/sysv/linux/sparc/sparc64/Makefile
	(CFLAGS-sigsuspend.c): Remove rule.
This commit is contained in:
Adhemerval Zanella 2016-11-24 10:12:37 -02:00
parent 2de15b61e9
commit b3b00aa8b0
5 changed files with 7 additions and 40 deletions
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6
ChangeLog
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@ -1,5 +1,11 @@
2017-05-18 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/unix/sysv/linux/alpha/sigsuspend.S: Remove file.
* sysdeps/unix/sysv/linux/sigsuspend.c: Simplify include list.
* nptl/Makefile (CFLAGS-sigsuspend.c): New rule.
* sysdeps/unix/sysv/linux/sparc/sparc64/Makefile
(CFLAGS-sigsuspend.c): Remove rule.
* sysdeps/unix/sysv/linux/Makefile (sysdeps_routines): Add tee.
(CFLAGS-tee.c): New rule.
* sysdeps/unix/sysv/linux/syscalls.list: Remove tee from

1
nptl/Makefile
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@ -217,6 +217,7 @@ CFLAGS-close.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-read.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-write.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-nanosleep.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-sigsuspend.c = -fexceptions -fasynchronous-unwind-tables
CFLAGS-pt-system.c = -fexceptions

32
sysdeps/unix/sysv/linux/alpha/sigsuspend.S
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@ -1,32 +0,0 @@
/* Copyright (C) 1993-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Mosberger <davidm@cs.arizona.edu>, 1995.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
/* sigsuspend is a special syscall since it needs to dereference the
sigset. This will have to change when we have more than 64 signals. */
#include <sysdep-cancel.h>
#undef PSEUDO_PREPARE_ARGS
#define PSEUDO_PREPARE_ARGS ldq a0, 0(a0);
PSEUDO(__sigsuspend, sigsuspend, 1)
ret
PSEUDO_END(__sigsuspend)
libc_hidden_def (__sigsuspend)
weak_alias (__sigsuspend, sigsuspend)
strong_alias (__sigsuspend, __libc_sigsuspend)

4
sysdeps/unix/sysv/linux/sigsuspend.c
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@ -15,12 +15,8 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
/* Change the set of blocked signals to SET,
wait until a signal arrives, and restore the set of blocked signals. */

4
sysdeps/unix/sysv/linux/sparc/sparc64/Makefile
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@ -7,7 +7,3 @@ LD += -melf64_sparc
ifeq ($(subdir),stdlib)
sysdep_routines += __start_context
endif
ifeq ($(subdir),nptl)
CFLAGS-sigsuspend.c += -fexceptions
endif