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glibc/sysdeps
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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
..
aarch64 aarch64: Optimized implementation of memmove for Qualcomm Falkor 2017-10-05 22:20:23 +05:30
alpha Use libm_alias_double for dbl-64 fma. 2017-10-04 20:32:48 +00:00
arm Update ARM libm-test-ulps. 2017-10-05 22:17:30 +00:00
generic Add libm_alias_*_other_r macros. 2017-10-10 21:29:11 +00:00
gnu hurd: Fix getifaddrs' and freeifaddrs' symbol exposition 2017-09-28 01:05:18 +02:00
hppa ld.so: Replace (&bootstrap_map) with BOOTSTRAP_MAP 2017-10-03 01:55:12 -07:00
i386 Don't use hidden visibility in libc.a with PIE on i386 2017-10-04 17:18:42 -07:00
ia64 ld.so: Replace (&bootstrap_map) with BOOTSTRAP_MAP 2017-10-03 01:55:12 -07:00
ieee754 Use generic alias macros in ldbl-opt. 2017-10-11 02:51:39 +00:00
init_array Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
m68k Do not wrap logf, log2f and powf 2017-10-02 14:39:38 +01:00
mach Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN 2017-10-03 01:33:38 +02:00
microblaze Obsolete pow10 functions. 2017-09-01 21:13:18 +00:00
mips mips: Don't check _DYNAMIC in elf_machine_load_address 2017-10-03 17:47:51 -07:00
nios2 Enable unwind info in libc-start.c and backtrace.c 2017-09-19 15:07:58 +01:00
nptl Remove add-ons mechanism. 2017-10-05 15:58:13 +00:00
posix Hide internal idna functions [BZ #18822] 2017-10-01 17:33:22 -07:00
powerpc powerpc: Fix IFUNC for memrchr 2017-10-06 10:04:52 +05:30
pthread aio: Remove internal_function function attribute 2017-08-31 15:59:06 +02:00
s390 S390: Regenerate ULPs 2017-10-05 12:50:49 +02:00
sh Enable unwind info in libc-start.c and backtrace.c 2017-09-19 15:07:58 +01:00
sparc Use libm_alias_double for dbl-64 fma. 2017-10-04 20:32:48 +00:00
tile Remove ancient __signbit inlines 2017-09-28 19:52:13 +01:00
unix Linux: Consolidate {RTLD_}SINGLE_THREAD_P definition 2017-10-11 14:27:24 -03:00
wordsize-32 Build divdi3 only for architecture that required it 2017-04-06 15:14:34 -03:00
wordsize-64 posix: Consolidate Linux glob implementation 2017-09-08 16:34:02 +02:00
x86 Remove ancient __signbit inlines 2017-09-28 19:52:13 +01:00
x86_64 Revert x86: Allow undefined _DYNAMIC in static executable 2017-10-03 17:49:09 -07:00