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
..
bits
sh3
sh4
sys	Fix mcontext_t sigcontext namespace (bug 21457).	2017-08-30 22:02:04 +00:00
____longjmp_chk.S
arch-fork.h
atomic-machine.h	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
brk.c
c++-types.data
clone.S	Call exit directly in clone (BZ #21512)	2017-06-26 17:52:20 -03:00
configure
configure.ac
fxstat.c
fxstatat.c
Implies
kernel-features.h	Simplify accept4, recvmmsg, sendmmsg code.	2017-05-09 21:59:36 +00:00
ld.abilist
libanl.abilist
libBrokenLocale.abilist
libc.abilist	posix: Add compat glob symbol to not follow dangling symbols	2017-09-25 18:04:16 -07:00
libcrypt.abilist
libdl.abilist
libm.abilist	New symbol version for logf, log2f and powf without SVID compat	2017-10-02 14:38:03 +01:00
libnsl.abilist
libpthread.abilist
libresolv.abilist
librt.abilist
libthread_db.abilist
libutil.abilist
localplt.data	Allow abort PLT references in libc.so for SH.	2017-08-16 17:01:27 +00:00
lockf64.c
lowlevel-atomic.h
lxstat.c
makecontext.S	Rename struct ucontext tag (bug 21457).	2017-06-26 22:03:58 +00:00
Makefile
pipe.S
profil-counter.h
pt-vfork.S
shlib-versions
sigaltstack-offsets.sym
sigcontextinfo.h
smp.h
syscall.S
syscalls.list	posix: Consolidate Linux waitpid syscall	2017-05-18 18:06:47 -03:00
sysdep.h
sysdep.S
Versions
vfork.S
xstat.c