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
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
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
mips	mips: Don't check _DYNAMIC in elf_machine_load_address	2017-10-03 17:47:51 -07:00
nios2
nptl	Remove add-ons mechanism.	2017-10-05 15:58:13 +00:00
posix
powerpc	powerpc: Fix IFUNC for memrchr	2017-10-06 10:04:52 +05:30
pthread
s390	S390: Regenerate ULPs	2017-10-05 12:50:49 +02:00
sh
sparc	Use libm_alias_double for dbl-64 fma.	2017-10-04 20:32:48 +00:00
tile
unix	Linux: Consolidate {RTLD_}SINGLE_THREAD_P definition	2017-10-11 14:27:24 -03:00
wordsize-32
wordsize-64
x86
x86_64	Revert x86: Allow undefined _DYNAMIC in static executable	2017-10-03 17:49:09 -07:00