mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 08:40:07 +00:00
3c7f1f59cd
This patch consolidates all Linux lseek/lseek64/llseek implementation
in on on sysdeps/unix/sysv/linux/lseek{64}.c. It also removes the llseek
file and instead consolidate the LFS lseek implementation on lseek64.c
as for other LFS symbols implementations.
The general idea is:
- lseek: ABIs that not define __OFF_T_MATCHES_OFF64_T will preferable
use __NR__llseek if kernel supports it, otherwise they will use __NR_lseek.
ABIs that defines __OFF_T_MATCHES_OFF64_T won't produce any symbol.
- lseek64: ABIs with __OFF_T_MATCHES_OFF64_T will preferable use __NR_lseek
(since it will use 64-bit arguments without low/high splitting) and
__NR__llseek if __NR_lseek is not defined (for some ILP32 ports).
- llseek: files will be removed and symbols will be aliased ot lseek64.
ABI without __OFF_T_MATCHES_OFF64_T and without __NR_llseek (basically MIPS64n32
so far) are covered by building lseek with off_t as expected and lseek64
using __NR_lseek (as expected for off64_t being passed using 64-bit registers).
For this consolidation I mantained the x32 assembly specific implementation
because to correctly fix this it would required both the x32 fix for
{INLINE,INTERNAL}_SYSCALL [1] and a wrapper to correctly subscribe it to
return 64 bits instead of default 32 bits (as for times). It could a future
cleanup.
It is based on my previous {INTERNAL,INLINE}_SYSCALL_CALL macro [2],
although it is mainly for simplification.
Tested on x86_64, i686, aarch64, armhf, and powerpc64le.
* nptl/Makefile (libpthread-routines): Remove ptw-llseek and add
ptw-lseek64.
* sysdeps/unix/sysv/linux/Makefile (sysdeps_routines): Remove llseek.
* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines):
Likewise.
* sysdeps/unix/sysv/linux/generic/wordsize-32/llseek.c: Remove file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/lseek.c: Remove file.
* sysdeps/unix/sysv/linux/mips/mips64/llseek.c: Likewise.
* sysdeps/unix/sysv/linux/llseek.c: Remove file.
* sysdeps/unix/sysv/linux/lseek.c: New file.
* sysdeps/unix/sysv/linux/lseek64.c: Add default Linux implementation.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list: Remove lseek and
__libc_lseek64 from auto-generation.
* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/lseek64.S: New file.
[1] https://sourceware.org/ml/libc-alpha/2016-08/msg00443.html
[2] https://sourceware.org/ml/libc-alpha/2016-08/msg00646.html
206 lines
6.6 KiB
Makefile
206 lines
6.6 KiB
Makefile
ifeq ($(subdir),csu)
|
|
sysdep_routines += errno-loc
|
|
endif
|
|
|
|
ifeq ($(subdir),assert)
|
|
CFLAGS-assert.c += -DFATAL_PREPARE_INCLUDE='<fatal-prepare.h>'
|
|
CFLAGS-assert-perr.c += -DFATAL_PREPARE_INCLUDE='<fatal-prepare.h>'
|
|
endif
|
|
|
|
ifeq ($(subdir),malloc)
|
|
CFLAGS-malloc.c += -DMORECORE_CLEARS=2
|
|
endif
|
|
|
|
ifeq ($(subdir),misc)
|
|
include $(firstword $(wildcard $(sysdirs:=/sysctl.mk)))
|
|
|
|
sysdep_routines += clone umount umount2 readahead \
|
|
setfsuid setfsgid epoll_pwait signalfd \
|
|
eventfd eventfd_read eventfd_write prlimit \
|
|
personality
|
|
|
|
CFLAGS-gethostid.c = -fexceptions
|
|
CFLAGS-tst-writev.c += "-DARTIFICIAL_LIMIT=0x80000000-__getpagesize()"
|
|
|
|
# Note that bits/mman-linux.h is listed here though the file lives in the
|
|
# top-level bits/ subdirectory instead of here in sysdeps/.../linux/bits/.
|
|
# That is just so that other (non-Linux) configurations for whom the
|
|
# bits/mman-linux.h definitions work well do not have to duplicate the
|
|
# contents of the file. The file must still be listed in sysdep_headers
|
|
# here and in any non-Linux configuration that uses it; other
|
|
# configurations will not install the file.
|
|
sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
|
|
sys/klog.h \
|
|
sys/user.h sys/prctl.h \
|
|
sys/kd.h sys/soundcard.h sys/vt.h \
|
|
sys/quota.h sys/fsuid.h \
|
|
scsi/sg.h scsi/scsi.h scsi/scsi_ioctl.h sys/pci.h \
|
|
sys/ultrasound.h sys/raw.h sys/personality.h sys/epoll.h \
|
|
bits/a.out.h sys/inotify.h sys/signalfd.h sys/eventfd.h \
|
|
sys/timerfd.h sys/fanotify.h bits/eventfd.h bits/inotify.h \
|
|
bits/signalfd.h bits/timerfd.h bits/epoll.h \
|
|
bits/socket_type.h bits/syscall.h bits/sysctl.h \
|
|
bits/mman-linux.h
|
|
|
|
tests += tst-clone tst-clone2 tst-fanotify tst-personality tst-quota \
|
|
tst-sync_file_range
|
|
|
|
# Generate the list of SYS_* macros for the system calls (__NR_* macros).
|
|
|
|
# If there is more than one syscall list for different architecture
|
|
# variants, the CPU/Makefile defines abi-variants to be a list of names
|
|
# for those variants (e.g. 32 64), and, for each variant, defines
|
|
# abi-$(variant)-options to be compiler options to cause <asm/unistd.h>
|
|
# to define the desired list of syscalls and abi-$(variant)-condition to
|
|
# be the condition for those options to use in a C #if condition.
|
|
# abi-includes may be defined to a list of headers to include
|
|
# in the generated header, if the default does not suffice.
|
|
#
|
|
# The generated header is compiled with `-ffreestanding' to avoid any
|
|
# circular dependencies against the installed implementation headers.
|
|
# Such a dependency would require the implementation header to be
|
|
# installed before the generated header could be built (See bug 15711).
|
|
# In current practice the generated header dependencies do not include
|
|
# any of the implementation headers removed by the use of `-ffreestanding'.
|
|
|
|
$(objpfx)bits/syscall%h $(objpfx)bits/syscall%d: ../sysdeps/unix/sysv/linux/sys/syscall.h
|
|
$(make-target-directory)
|
|
{ \
|
|
echo '/* Generated at libc build time from kernel syscall list. */';\
|
|
echo ''; \
|
|
echo '#ifndef _SYSCALL_H'; \
|
|
echo '# error "Never use <bits/syscall.h> directly; include <sys/syscall.h> instead."'; \
|
|
echo '#endif'; \
|
|
echo ''; \
|
|
$(foreach h,$(abi-includes), echo '#include <$(h)>';) \
|
|
echo ''; \
|
|
$(if $(abi-variants), \
|
|
$(foreach v,$(abi-variants),\
|
|
$(CC) -ffreestanding -E -MD -MP -MF $(@:.h=.d)-t$(v) -MT '$(@:.d=.h) $(@:.h=.d)' \
|
|
-x c $(sysincludes) $< $(abi-$(v)-options) \
|
|
-D_LIBC -dM | \
|
|
sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \
|
|
LC_ALL=C sort > $(@:.d=.h).new$(v); \
|
|
$(if $(abi-$(v)-condition),\
|
|
echo '#if $(abi-$(v)-condition)';) \
|
|
cat $(@:.d=.h).new$(v); \
|
|
$(if $(abi-$(v)-condition),echo '#endif';) \
|
|
rm -f $(@:.d=.h).new$(v); \
|
|
), \
|
|
$(CC) -ffreestanding -E -MD -MP -MF $(@:.h=.d)-t$(v) -MT '$(@:.d=.h) $(@:.h=.d)' \
|
|
-x c $(sysincludes) $< \
|
|
-D_LIBC -dM | \
|
|
sed -n 's@^#define __NR_\([^ ]*\) .*$$@#define SYS_\1 __NR_\1@p' | \
|
|
LC_ALL=C sort;) \
|
|
} > $(@:.d=.h).new
|
|
mv -f $(@:.d=.h).new $(@:.d=.h)
|
|
ifdef abi-variants
|
|
ifneq (,$(objpfx))
|
|
sed $(sed-remove-objpfx) \
|
|
$(foreach v,$(abi-variants),$(@:.h=.d)-t$(v)) > $(@:.h=.d)-t3
|
|
else
|
|
cat $(foreach v,$(abi-variants),$(@:.h=.d)-t$(v)) \
|
|
> $(@:.h=.d)-t3
|
|
endif
|
|
rm -f $(foreach v,$(abi-variants),$(@:.h=.d)-t$(v))
|
|
mv -f $(@:.h=.d)-t3 $(@:.h=.d)
|
|
else
|
|
mv -f $(@:.h=.d)-t $(@:.h=.d)
|
|
endif
|
|
|
|
ifndef no_deps
|
|
# Get the generated list of dependencies (probably /usr/include/asm/unistd.h).
|
|
-include $(objpfx)bits/syscall.d
|
|
endif
|
|
generated += bits/syscall.h bits/syscall.d
|
|
endif
|
|
|
|
ifeq ($(subdir),time)
|
|
sysdep_headers += sys/timex.h bits/timex.h
|
|
|
|
sysdep_routines += ntp_gettime ntp_gettimex
|
|
endif
|
|
|
|
ifeq ($(subdir),socket)
|
|
sysdep_headers += net/if_ppp.h net/ppp-comp.h \
|
|
net/ppp_defs.h net/if_arp.h net/route.h net/ethernet.h \
|
|
net/if_slip.h net/if_packet.h net/if_shaper.h
|
|
sysdep_routines += cmsg_nxthdr
|
|
CFLAGS-recvmmsg.c = -fexceptions -fasynchronous-unwind-tables
|
|
CFLAGS-sendmmsg.c = -fexceptions -fasynchronous-unwind-tables
|
|
endif
|
|
|
|
ifeq ($(subdir),sunrpc)
|
|
sysdep_headers += nfs/nfs.h
|
|
endif
|
|
|
|
ifeq ($(subdir),termios)
|
|
sysdep_headers += termio.h
|
|
endif
|
|
|
|
ifeq ($(subdir),posix)
|
|
sysdep_headers += bits/initspin.h
|
|
|
|
sysdep_routines += sched_getcpu
|
|
|
|
tests += tst-affinity tst-affinity-pid
|
|
|
|
CFLAGS-fork.c = $(libio-mtsafe)
|
|
CFLAGS-getpid.o = -fomit-frame-pointer
|
|
CFLAGS-getpid.os = -fomit-frame-pointer
|
|
endif
|
|
|
|
ifeq ($(subdir),inet)
|
|
sysdep_headers += netinet/if_fddi.h netinet/if_tr.h \
|
|
netipx/ipx.h netash/ash.h netax25/ax25.h netatalk/at.h \
|
|
netrom/netrom.h netpacket/packet.h netrose/rose.h \
|
|
neteconet/ec.h netiucv/iucv.h
|
|
sysdep_routines += netlink_assert_response
|
|
endif
|
|
|
|
# Don't compile the ctype glue code, since there is no old non-GNU C library.
|
|
inhibit-glue = yes
|
|
|
|
ifeq ($(subdir),dirent)
|
|
sysdep_routines += getdirentries getdirentries64
|
|
endif
|
|
|
|
ifeq ($(subdir),nis)
|
|
CFLAGS-ypclnt.c = -DUSE_BINDINGDIR=1
|
|
endif
|
|
|
|
ifeq ($(subdir),io)
|
|
sysdep_routines += xstatconv internal_statvfs internal_statvfs64 \
|
|
sync_file_range fallocate fallocate64
|
|
sysdep_headers += bits/fcntl-linux.h
|
|
|
|
tests += tst-fallocate tst-fallocate64
|
|
endif
|
|
|
|
ifeq ($(subdir),elf)
|
|
sysdep-rtld-routines += dl-brk dl-sbrk dl-getcwd dl-openat64 dl-opendir \
|
|
dl-fxstatat64
|
|
|
|
libof-lddlibc4 = lddlibc4
|
|
|
|
others += pldd
|
|
install-bin += pldd
|
|
$(objpfx)pldd: $(objpfx)xmalloc.o
|
|
endif
|
|
|
|
ifeq ($(subdir),rt)
|
|
CFLAGS-mq_send.c += -fexceptions
|
|
CFLAGS-mq_receive.c += -fexceptions
|
|
endif
|
|
|
|
ifeq ($(subdir),nscd)
|
|
sysdep-CFLAGS += -DHAVE_EPOLL -DHAVE_SENDFILE -DHAVE_INOTIFY -DHAVE_NETLINK
|
|
CFLAGS-gai.c += -DNEED_NETLINK
|
|
endif
|
|
|
|
ifeq ($(subdir),nptl)
|
|
tests += tst-setgetname tst-align-clone tst-getpid1 \
|
|
tst-thread-affinity-pthread tst-thread-affinity-pthread2 \
|
|
tst-thread-affinity-sched
|
|
endif
|