glibc/misc/Makefile
Adhemerval Zanella 91cf411ad3 linux: Only use 64-bit syscall if required for pselect
For !__ASSUME_TIME64_SYSCALLS there is no need to issue a 64-bit syscall
if the provided timeout fits in a 32-bit one.  The 64-bit usage should
be rare since the timeout is a relative one.  This also avoids the need
to use supports_time64() (which breaks the usage case of live migration
like CRIU or similar).

Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel
(with and without --enable-kernel=5.1) and on x86_64-linux-gnu.

Reviewed-by: Lukasz Majewski <lukma@denx.de>
2021-06-22 12:09:52 -03:00

174 lines
6.2 KiB
Makefile

# Copyright (C) 1991-2021 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# 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
# <https://www.gnu.org/licenses/>.
#
# Sub-makefile for misc portion of the library.
#
subdir := misc
include ../Makeconfig
headers := sys/uio.h bits/uio-ext.h bits/uio_lim.h \
sys/ioctl.h bits/ioctls.h bits/ioctl-types.h \
sys/ptrace.h sys/file.h sys/dir.h sys/cdefs.h \
ar.h a.out.h libgen.h stab.h bits/stab.def sgtty.h \
ttyent.h paths.h sys/reboot.h \
sys/mman.h sys/param.h bits/param.h \
fstab.h mntent.h search.h err.h error.h \
sys/queue.h sysexits.h syscall.h sys/syscall.h sys/swap.h \
sys/select.h sys/sysinfo.h \
regexp.h bits/select.h bits/mman.h sys/xattr.h \
syslog.h sys/syslog.h \
bits/syslog.h bits/syslog-ldbl.h bits/syslog-path.h bits/error.h \
bits/select2.h bits/hwcap.h sys/auxv.h \
sys/sysmacros.h bits/sysmacros.h bits/types/struct_iovec.h \
bits/err-ldbl.h bits/error-ldbl.h \
sys/single_threaded.h
routines := brk sbrk sstk ioctl \
readv writev preadv preadv64 pwritev pwritev64 \
preadv2 preadv64v2 pwritev2 pwritev64v2 \
setreuid setregid \
seteuid setegid \
getpagesize \
getdtsz \
gethostname sethostname getdomain setdomain \
select pselect \
acct chroot fsync sync fdatasync syncfs reboot \
gethostid sethostid \
revoke vhangup \
swapon swapoff mktemp mkstemp mkstemp64 mkdtemp \
mkostemp mkostemp64 mkstemps mkstemps64 mkostemps mkostemps64 \
ualarm usleep \
gtty stty \
ptrace \
fstab mntent mntent_r \
utimes lutimes futimes futimesat \
truncate ftruncate truncate64 ftruncate64 \
chflags fchflags \
insremque getttyent getusershell getpass ttyslot \
syslog syscall daemon \
mmap mmap64 munmap mprotect msync madvise mincore remap_file_pages\
mlock munlock mlockall munlockall \
efgcvt efgcvt_r qefgcvt qefgcvt_r \
hsearch hsearch_r tsearch lsearch \
err error ustat \
getsysstats dirname regexp \
getloadavg getclktck \
fgetxattr flistxattr fremovexattr fsetxattr getxattr \
listxattr lgetxattr llistxattr lremovexattr lsetxattr \
removexattr setxattr getauxval ifunc-impl-list makedev \
allocate_once fd_to_filename single_threaded unwind-link
generated += tst-error1.mtrace tst-error1-mem.out \
tst-allocate_once.mtrace tst-allocate_once-mem.out
aux := init-misc
install-lib := libg.a
gpl2lgpl := error.c error.h
tests := tst-dirname tst-tsearch tst-fdset tst-mntent tst-hsearch \
tst-error1 tst-pselect tst-insremque tst-mntent2 bug-hsearch1 \
tst-mntent-blank-corrupt tst-mntent-blank-passno bug18240 \
tst-preadvwritev tst-preadvwritev64 tst-makedev tst-empty \
tst-preadvwritev2 tst-preadvwritev64v2 tst-warn-wide \
tst-ldbl-warn tst-ldbl-error tst-dbl-efgcvt tst-ldbl-efgcvt \
tst-mntent-autofs tst-syscalls tst-mntent-escape tst-select
tests-time64 := \
tst-select-time64 \
tst-pselect-time64
# Tests which need libdl.
ifeq (yes,$(build-shared))
tests += tst-gethostid
endif
tests-internal := tst-atomic tst-atomic-long tst-allocate_once
tests-static := tst-empty
# Test for the internal, non-exported __fd_to_filename function.
tests-internal += tst-fd_to_filename
tests-static += tst-fd_to_filename
ifeq ($(run-built-tests),yes)
tests-special += $(objpfx)tst-error1-mem.out \
$(objpfx)tst-allocate_once-mem.out
endif
CFLAGS-select.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-tsearch.c += $(uses-callbacks)
CFLAGS-lsearch.c += $(uses-callbacks)
CFLAGS-pselect.c += -fexceptions
CFLAGS-readv.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-writev.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-preadv.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-preadv64.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-pwritev.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-pwritev64.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-preadv2.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-preadv64v2.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-pwritev2.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-pwritev64v2.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-usleep.c += -fexceptions
CFLAGS-syslog.c += -fexceptions
CFLAGS-error.c += -fexceptions
CFLAGS-getpass.c += -fexceptions
CFLAGS-mkstemp.c += -fexceptions
CFLAGS-mkstemp64.c += -fexceptions
CFLAGS-getsysstats.c += -fexceptions
CFLAGS-getusershell.c += -fexceptions
CFLAGS-err.c += -fexceptions
CFLAGS-tst-tsearch.c += $(stack-align-test-flags)
CFLAGS-msync.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-fdatasync.c += -fexceptions -fasynchronous-unwind-tables
CFLAGS-fsync.c += -fexceptions -fasynchronous-unwind-tables
# Called during static library initialization, so turn stack-protection
# off for non-shared builds.
CFLAGS-sbrk.o = $(no-stack-protector)
CFLAGS-sbrk.op = $(no-stack-protector)
CFLAGS-brk.o = $(no-stack-protector)
CFLAGS-brk.op = $(no-stack-protector)
include ../Rules
ifeq (yes,$(build-shared))
librt = $(common-objpfx)rt/librt.so
else
librt = $(common-objpfx)rt/librt.a
endif
$(objpfx)libg.a: $(dep-dummy-lib); $(make-dummy-lib)
$(objpfx)tst-tsearch: $(libm)
tst-error1-ENV = MALLOC_TRACE=$(objpfx)tst-error1.mtrace
tst-error1-ARGS = $(objpfx)tst-error1.out
$(objpfx)tst-error1-mem.out: $(objpfx)tst-error1.out
$(common-objpfx)malloc/mtrace $(objpfx)tst-error1.mtrace > $@; \
$(evaluate-test)
tst-allocate_once-ENV = MALLOC_TRACE=$(objpfx)tst-allocate_once.mtrace
$(objpfx)tst-allocate_once-mem.out: $(objpfx)tst-allocate_once.out
$(common-objpfx)malloc/mtrace $(objpfx)tst-allocate_once.mtrace > $@; \
$(evaluate-test)
$(objpfx)tst-pselect: $(librt)
$(objpfx)tst-pselect-time64: $(librt)