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glibc/sysdeps/unix/sysv/linux
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Yury Khrustalev c0f0db2d59 aarch64: simplify calls to __libc_arm_za_disable in assembly 
There is no functional change in this patch.

We remove stores and loads to stack, return address signing, and redundant
CFI directives before and after call to __libc_arm_za_disable().

The __libc_arm_za_disable implementation follows special calling convention
that allows to avoid most of the operations that would be necessary for a
call to a normal function (see [1] for details).

First, we rely on __libc_arm_za_disable() not clobbering certain registers,
and we put return address into one of these registers. Now we don't need
to store it on stack, so we don't need to sign return address using PAC.

Second, as a result of the above, we don't need to update the CFI offset.

This patch provides small optimisation avoiding unnecessary store and load
on stack also simplifies assembly code and CFI directives.

[1]: https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 		2025-06-18 09:42:33 +01:00
..
aarch64 aarch64: simplify calls to __libc_arm_za_disable in assembly 2025-06-18 09:42:33 +01:00
alpha termios: unify the naming of the termios speed fields 2025-06-17 09:11:38 -03:00
arc termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
arm termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
bits termios: unify the naming of the termios speed fields 2025-06-17 09:11:38 -03:00
csky termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
hppa termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
i386 termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
include
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loongarch termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
m68k termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
microblaze termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
mips termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
net
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netash
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netatalk
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netax25
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neteconet
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netinet
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netipx
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netiucv
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netpacket
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netrom
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netrose
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nfs
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or1k termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
powerpc termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
riscv termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
s390 termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
scsi
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sh termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
sparc termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
sys linux: Fix integer overflow warnings when including <sys/mount.h> [BZ #32708] 2025-03-25 23:55:08 -04:00
wordsize-64
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x86
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x86_64 termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
Implies
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Makefile linux/termios: regression test for termios speed functions 2025-06-17 09:57:44 -03:00
Versions linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
_G_config.h
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____longjmp_chk.c
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_exit.c
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a.out.h
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accept.c
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accept4.c
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access.c
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adjtime.c
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adjtimex.c
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aio_misc.h
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aio_sigqueue.c
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alphasort64.c
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arch-fd_to_filename.h
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arch-fork.h
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bind.c
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brk.c
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brk_call.h
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cfsetspeed.c termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
check_native.c
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check_pf.c
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chmod.c
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chown.c
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clock.c
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clock_adjtime.c
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clock_getcpuclockid.c
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clock_getres.c
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clock_gettime.c
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clock_nanosleep.c
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clock_settime.c
…
clone-internal.c
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clone-pidfd-support.c
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clone3.c
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clone3.h
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close.c
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close_nocancel.c
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closedir.c
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closefrom_fallback.c
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cmsg_nxthdr.c
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cnd_timedwait.c
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configure
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configure.ac
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connect.c
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convert_scm_timestamps.c
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copy_file_range.c
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creat.c
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creat64.c
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default-sched.h
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device-nrs.h
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dirfd.c
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dirstream.h
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dl-affinity.h
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dl-diagnostics-kernel.c
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dl-early_allocate.c
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dl-execstack.c nptl: Fix pthread_getattr_np when modules with execstack are allowed (BZ 32897) 2025-04-28 10:13:46 -03:00
dl-execve.h
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dl-extra_tls.h
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dl-fxstatat64.c
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dl-getcwd.c
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dl-openat64.c
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dl-opendir.c
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dl-origin.c elf: Canonicalize $ORIGIN in an explicit ld.so invocation [BZ 25263] 2025-03-13 16:50:16 -03:00
dl-osinfo.h
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dl-parse_auxv.h
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dl-rseq-symbols.S
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dl-sbrk.c
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dl-sysdep.c
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dl-sysdep.h
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dl-vdso-setup.c
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dl-vdso-setup.h
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dl-vdso.h
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dl-write.c
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dl-writev.h
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dup2.c
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epoll_create.c
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epoll_pwait.c
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epoll_pwait2.c
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epoll_wait.c
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errlist-compat-data.h
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errlist-compat.h
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errqueue.h
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eventfd_read.c
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eventfd_write.c
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execveat.c
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faccessat.c
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fallocate.c
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fallocate64.c
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fanotify_mark.c
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fatal-prepare.h
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fchmodat.c
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fcntl.c
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fcntl64.c
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fcntl_nocancel.c
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fdatasync.c
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fdopendir.c
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features-time64.h
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fexecve.c
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filter-nr-syscalls.awk
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fixup-asm-unistd.h
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fpathconf.c
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fstat.c
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fstat64.c
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fstatat.c
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fstatat64.c
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fstatfs.c
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fstatfs64.c
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fstatvfs.c
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fstatvfs64.c
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fsync.c
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ftime.c
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ftruncate.c
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ftruncate64.c
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futimens.c
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futimes.c
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futimesat.c
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fxstat.c
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fxstat64.c
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fxstatat.c
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fxstatat64.c
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gai_sigqueue.c
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gen-syscall-h.awk
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gentempfd.c
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getclktck.c
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getcpu.c
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getcwd.c
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getdents.c
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getdents64.c
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getdirentries.c
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getdirentries64.c
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getdtsz.c
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getentropy.c
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gethostid.c
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getipv4sourcefilter.c
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getitimer.c
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getloadavg.c
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getlogin.c
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getlogin_r.c
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getpagesize.c
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getpeername.c
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getpriority.c
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getpt.c
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getrandom-internal.h
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getrandom.c
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getrlimit.c
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getrlimit64.c
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getrusage.c
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getsockname.c
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getsockopt.c
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getsourcefilter.c
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getsourcefilter.h
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getsysstats.c
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gettimeofday.c
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glibcsyscalls.py
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glob-lstat-compat.c
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glob.c
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glob64-lstat-compat.c
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glob64-time64.c
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glob64.c
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globfree.c
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globfree64-time64.c
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globfree64.c
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grantpt.c
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if_index.c Linux: Drop obsolete kernel support with `if_nameindex' and `if_nametoindex' 2025-06-05 19:04:46 +01:00
ifaddrs.c
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ifreq.c
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inotify_init.c
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internal-ioctl.h
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internal-signals.h
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internal-sigset.h
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internal-stat.h
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internal_statvfs.c
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internal_statvfs.h
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ioctl.c
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ipc_ops.h
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ipc_priv.h
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isatty.c linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
isatty_nostatus.c linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
kernel-features.h linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
kernel-posix-cpu-timers.h
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kernel-posix-timers.h
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kernel_sigaction.h
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kernel_stat.h
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kstat_cp.h
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lchown.c
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ldsodefs.h
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libc-vdso.h
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libc_fatal.c
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libc_sigaction.c sigaction: don't sign-extend sa_flags 2025-06-03 10:53:12 +02:00
librt-compat.c
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link.c
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linux_fsinfo.h
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listen.c
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local-setxid.h
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lseek.c
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lseek64.c
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lstat.c
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lstat64.c
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lutimes.c
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lxstat.c
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lxstat64.c
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machine-sp.h
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malloc-hugepages.c
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malloc-sysdep.h
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mkdir.c
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mknodat.c
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mlock2.c
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mmap.c
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mmap64.c
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mmap_call.h
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mmap_internal.h
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mq_close.c
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mq_getattr.c
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mq_notify.c
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mq_open.c
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mq_receive.c
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mq_send.c
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mq_setattr.c
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mq_timedreceive.c
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mq_timedsend.c
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mq_unlink.c
…
mremap-failure.h
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mremap.c
…
msgctl.c
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msgget.c
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msgrcv.c
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msgsnd.c
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msync.c
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mtx_timedlock.c
…
nanosleep.c
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netlink_assert_response.c
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netlinkaccess.h
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not-cancel.h
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not-errno.h
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nscd_setup_thread.c
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ntp_gettime.c
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ntp_gettimex.c
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old_termios.h linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
olddirent.h
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oldglob.c
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open.c
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open64.c
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open64_nocancel.c
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open_by_handle_at.c
…
open_nocancel.c
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openat.c
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openat64.c
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openat64_nocancel.c
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openat_nocancel.c
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opendir.c
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pathconf.c
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pathconf.h
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paths.h
…
pause.c
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personality.c
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pidfd_getpid.c
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pidfd_spawn.c
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pidfd_spawnp.c
…
pipe.c
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pkey_get.c
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pkey_mprotect.c
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pkey_set.c
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poll.c
…
posix_fadvise.c
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posix_fadvise64.c
…
posix_fallocate.c
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posix_fallocate64.c
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posix_madvise.c
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ppoll.c
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ppoll_chk.c
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pread.c
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pread64.c
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pread64_nocancel.c
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preadv.c
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preadv2.c
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preadv64.c
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preadv64v2.c
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prlimit.c
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prlimit64.c
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process_vm_readv.c
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process_vm_writev.c
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procutils.c
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procutils.h
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prof-freq.c
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profil-counter.h
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profil.c
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pselect.c
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pselect32.c
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ptrace.c
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ptsname.c
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pwrite.c
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pwrite64.c
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pwritev.c
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pwritev2.c
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pwritev64.c
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pwritev64v2.c
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read.c
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read_nocancel.c
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readahead.c
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readdir.c
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readdir64.c
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readdir64_r.c
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readdir_r.c
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readlink.c
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readonly-area-fallback.c debug: Improve '%n' fortify detection (BZ 30932) 2025-03-21 15:46:48 -03:00
readv.c
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reboot.c
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recv.c
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recvfrom.c
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recvmmsg.c
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recvmsg.c
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remove.c
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rename.c
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renameat.c
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renameat2.c
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rewinddir.c
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rmdir.c
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rseq-internal.h
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sa_len.c
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safe-fatal.h
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scandir64.c
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sched_getaffinity.c
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sched_getattr.c
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sched_getcpu.c
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sched_rr_gi.c
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sched_setaffinity.c
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sched_setattr.c
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seekdir.c
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select.c
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semctl.c
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semget.c
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semop.c
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semtimedop.c
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send.c
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sendfile.c
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sendfile64.c
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sendmmsg.c
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sendmsg.c
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sendto.c
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set-freeres-os.h
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setegid.c
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seteuid.c
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setgid.c
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setgroups.c
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sethostid.c
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setipv4sourcefilter.c
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setitimer.c
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setregid.c
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setresgid.c
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setresuid.c
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setreuid.c
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setrlimit.c
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setrlimit64.c
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setsockopt.c
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setsourcefilter.c
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settimeofday.c
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settimezone.c
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setuid.c
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setvmaname.c
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setvmaname.h
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shlib-versions
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shmat.c
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shmctl.c
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shmdt.c
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shmget.c
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shutdown.c
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siglist-compat.h
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signalfd.c
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sigpending.c
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sigprocmask.c
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sigqueue.c
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sigreturn.c
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sigset-cvt-mask.h
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sigsetops.h
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sigstack.c
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sigsuspend.c
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sigtimedwait.c
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sigwait.c
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sigwaitinfo.c
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single-thread.h
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sizes.h
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socket-constants-time64.h
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socket.c
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socketcall.h
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socketpair.c
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spawn_int_def.h
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spawnattr_getcgroup_np.c
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spawnattr_setcgroup_np.c
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spawni.c
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speed.c termios: add new baud_t interface, defined to be explicitly numeric 2025-06-17 09:11:38 -03:00
splice.c
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startup.h
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stat.c
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stat64.c
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stat_t64_cp.c
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stat_t64_cp.h
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statfs.c
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statfs64.c
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statvfs.c
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statvfs64.c
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statx.c
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statx_cp.c
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statx_cp.h
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struct_kernel_msqid64_ds.h
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struct_kernel_semid64_ds.h
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struct_kernel_shmid64_ds.h
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struct_stat_time64.h
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symlink.c
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sync_file_range.c
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syscall-names.list Update syscall lists for Linux 6.15 2025-05-29 19:21:46 +00:00
syscall.c
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syscall_cancel.c
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syscalls.list
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sysconf-pthread_stack_min.h
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sysconf-sigstksz.h
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sysconf.c
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sysctl.c
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sysdep-cancel.h
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sysdep-vdso.h
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sysdep.h
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tcdrain.c
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tcflow.c
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tcflush.c
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tcgetattr.c linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
tcgetpgrp.c
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tcsendbrk.c
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tcsetattr.c linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
tcsetpgrp.c
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tee.c
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telldir.c
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termios_arch.h linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
termios_internals.h linux: implement arbitrary and split speeds in termios 2025-06-17 09:11:38 -03:00
test-errno-linux.c
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thrd_priv.h
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thrd_sleep.c
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time-clockid.h
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time.c
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timer_create.c
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timer_delete.c
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timer_getoverr.c
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timer_gettime.c
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timer_routines.c
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timer_settime.c
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timer_t_was_int_compat.h
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timerfd_gettime.c
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timerfd_settime.c
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times.c
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timespec_get.c
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timespec_getres.c
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tls-internal.c
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tls-internal.h
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truncate.c
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truncate64.c
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tst-adjtimex-time64.c
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tst-adjtimex.c
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tst-affinity-pid.c
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tst-affinity-static.c
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tst-affinity.c
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tst-align-clone-internal.c
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tst-align-clone.c
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tst-clock_adjtime-time64.c
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tst-clock_adjtime.c
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tst-clock_gettime-clobber.c
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tst-clone.c
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tst-clone2-internal.c
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tst-clone2.c
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tst-clone3-internal.c
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tst-clone3.c
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tst-epoll-ioctls.c
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tst-epoll-time64.c
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tst-epoll.c
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tst-fallocate-common.c
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tst-fallocate.c
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tst-fallocate64.c
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tst-fanotify.c
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tst-fdopendir-o_path.c
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tst-getauxval.c
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tst-getcwd-smallbuff.c
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tst-getdents64.c
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tst-getpid1-internal.c
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tst-getpid1.c
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tst-gettid-kill.c
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tst-gettid.c
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tst-gettimeofday-clobber.c
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tst-glibcsyscalls.py
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tst-linux-mremap1.c
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tst-memfd_create.c
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tst-misalign-clone.c
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tst-mlock2.c
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tst-mman-consts.py Update kernel version to 6.13 in header constant tests 2025-03-24 15:51:23 +00:00
tst-mount-compile.py
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tst-mount-consts.py Update kernel version to 6.13 in header constant tests 2025-03-24 15:51:23 +00:00
tst-mount.c
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tst-nolink-libc.c
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tst-ntp_adjtime-time64.c
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tst-ntp_adjtime.c
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tst-ntp_gettime-time64.c
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tst-ntp_gettime.c
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tst-ntp_gettimex-time64.c
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tst-ntp_gettimex.c
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tst-o_path-locks.c
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tst-ofdlocks-compat.c
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tst-ofdlocks.c
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tst-personality.c
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tst-pidfd-consts.py
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tst-pidfd.c
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tst-pidfd_getpid.c
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tst-pkey.c linux: use PKEY_UNRESTRICTED macro in tst-pkey 2025-05-28 10:59:26 +01:00
tst-posix_spawn-setsid-pidfd.c
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tst-ppoll-time64.c
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tst-ppoll.c
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tst-prctl-time64.c
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tst-prctl.c
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tst-process_madvise.c
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tst-process_mrelease.c
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tst-quota.c
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tst-readdir64-compat.c
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tst-rlimit-infinity.c
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tst-rseq-disable-static.c
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tst-rseq-disable.c
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tst-rseq-nptl-static.c
…
tst-rseq-nptl.c
…
tst-rseq-static.c
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tst-rseq-tls-range-4096-static.c
…
tst-rseq-tls-range-4096.c
…
tst-rseq-tls-range-mod.c
…
tst-rseq-tls-range-static.c
…
tst-rseq-tls-range.c
…
tst-rseq.c
…
tst-rseq.h
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tst-sched-affinity-inheritance.c
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tst-sched-consts.py Update kernel version to 6.13 in header constant tests 2025-03-24 15:51:23 +00:00
tst-sched_setattr-thread.c Linux: Add new test misc/tst-sched_setattr-thread 2025-03-12 10:23:59 +01:00
tst-sched_setattr.c
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tst-scm_rights-time64.c
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tst-scm_rights.c
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tst-sem_getvalue-affinity.c
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tst-sigcontext-get_pc.c
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tst-signal-numbers.py
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tst-sigtimedwait-time64.c
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tst-sigtimedwait.c
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tst-skeleton-affinity.c nptl: extend test coverage for sched_yield 2025-03-07 17:50:44 -05:00
tst-skeleton-thread-affinity.c nptl: extend test coverage for sched_yield 2025-03-07 17:50:44 -05:00
tst-socket-consts.py
…
tst-socket-timestamp-compat-time64.c
…
tst-socket-timestamp-compat.c
…
tst-socket-timestamp-time64.c
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tst-socket-timestamp.c
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tst-spawn-cgroup.c
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tst-spawn-chdir-pidfd.c
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tst-spawn-pidfd.c
…
tst-spawn-pidfd.h
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tst-spawn2-pidfd.c
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tst-spawn3-pidfd.c
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tst-spawn4-pidfd.c
…
tst-spawn5-pidfd.c
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tst-spawn6-pidfd.c
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tst-spawn7-pidfd.c
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tst-sync_file_range.c
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tst-syscall-list.sh
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tst-syscall-restart.c
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tst-sysconf-iov_max-uapi.c
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tst-sysconf-iov_max.c
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tst-sysvmsg-linux.c
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tst-sysvsem-linux.c
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tst-sysvshm-linux.c
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tst-termios-linux.c linux/termios: regression test for termios speed functions 2025-06-17 09:57:44 -03:00
tst-tgkill.c
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tst-time-clobber.c
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tst-timerfd-time64.c
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tst-timerfd.c
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tst-ttyname-common.c
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tst-ttyname-direct.c
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tst-ttyname-namespace.c
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ttyname.c
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ttyname.h
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ttyname_r.c
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tv32-compat.h
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ualarm.c
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umount.c
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umount2.c
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unlink.c
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unlockpt.c
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update-syscall-lists.py
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updwtmp.c
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ustat.c
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utime.c
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utimensat.c
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utimes.c
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utmp_file.c
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versionsort64.c
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vfork.c
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vmsplice.c
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wait3.c
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wait4.c
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waitid.c
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write.c
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write_nocancel.c
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writev.c
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xmknod.c
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xmknodat.c
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xstat.c
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xstat64.c
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xstatconv.c
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xstatconv.h
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xstatover.h
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xstatver.h
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