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glibc/sysdeps/unix
History
Adhemerval Zanella 09c76a7409 Linux: Consolidate {RTLD_}SINGLE_THREAD_P definition 
Current GLIBC has two ways to implement the single thread optimization
on syscalls to avoid calling the cancellation path: either by using
global variables (__{libc,pthread}_multiple_thread) or by accessing
the TCB field (defined by TLS_MULTIPLE_THREADS_IN_TCB).  Both the
variables and the macros to acces its value are defined in the
architecture sysdep-cancel.h header.

This patch consolidates its definition on only one header,
sysdeps/unix/sysv/linux/sysdep-cancel.h, and adds a new define
(SINGLE_THREAD_BY_GLOBAL) which the architecture defines if it prefer
to use the global variables instead of the TCB field.  This is an
optimization, so if the architecture does not define it, the TCB
method will be used as default.

Checked on x86_64-linux-gnu and on a build with major touched
ABIs (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabihf,
hppa-linux-gnu, i686-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu,
mips-linux-gnu, mips64-linux-gnu, powerpc-linux-gnu,
powerpc64le-linux-gnu, s390-linux-gnu, s390x-linux-gnu, sh4-linux-gnu,
sparcv9-linux-gnu, sparc64-linux-gnu, tilegx-linux-gnu).

	* sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h: Remove file.
	* sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/arm/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/nios2/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/tile/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
	(SINGLE_THREAD_BY_GLOBAL): Define.
	* sysdeps/unix/sysv/linux/aarch64/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
	Likewise.
	* sysdeps/unix/sysv/linux/alpha/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
	Likewise.
	* sysdeps/unix/sysv/linux/arm/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
	Likewise.
	* sysdeps/unix/sysv/linux/hppa/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
	Likewise.
	* sysdeps/unix/sysv/linux/microblaze/sysdep.h
	(SINGLE_THREAD_BY_GLOBAL): Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
	Likewise.
2017-10-11 14:27:24 -03:00
..
alpha Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
arm Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
bsd Hide internal __tcgetattr function [BZ #18822] 2017-10-01 17:48:24 -07:00
i386 Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
inet Remove add-ons mechanism. 2017-10-05 15:58:13 +00:00
mips Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
powerpc Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sh Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
sysv/linux Linux: Consolidate {RTLD_}SINGLE_THREAD_P definition 2017-10-11 14:27:24 -03:00
x86_64 Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
clock_gettime.c hurd: Fix exposition of s/gettimeofday through timespec_s/get 2017-09-25 01:55:02 +02:00
clock_nanosleep.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
clock_settime.c hurd: Fix exposition of s/gettimeofday through timespec_s/get 2017-09-25 01:55:02 +02:00
confstr.h
get_child_max.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getlogin_r.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getlogin.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
getpagesize.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
grantpt.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ifreq.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Implies
make-syscalls.sh Fix make-syscalls.sh VDSO support for GCC 8. 2017-09-26 21:21:01 +00:00
Makefile Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
s-proto-cancel.S
s-proto.S
setxid.h Update. 2004-11-12 01:27:04 +00:00
sockatmark.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stime.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
syscall-template.S Remove cancellation support for syscall generation 2017-08-24 14:58:35 -03:00
syscall.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
syscalls.list posix: Consolidate Linux fsync syscall 2017-05-18 18:06:47 -03:00
sysdep.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00