glibc/sysdeps/unix
Adhemerval Zanella 5f85cc2f47 linux: Consolidate fxstatat{64}
The LFS support is implemented on fxstat64.c, instead of fxstat.c for
64-bit architectures.  The fxstatat.c implements the non-LFS and it is
a no-op for !XSTAT_IS_XSTAT64.

The generic non-LFS implementation handles two cases:

  1. New kABIs which uses generic pre 64-bit time Linux ABI (csky and
     nios): it issues __NR_fstatat64 plus handle the overflow on st_ino,
     st_size, or st_blocks.  It only handles _STAT_VER_KERNEL.

  2. Old kABIs with old non-LFS support (arm, i386, hppa, m68k, mips32,
     microblaze, s390, sh, powerpc, and sparc32).  it issues
     __NR_fstatat64 and convert to non-LFS stat struct based on the
     version.

Also non-LFS mips64 is an outlier and it has its own implementation
since _STAT_VER_LINUX requires a different conversion function (it
uses the kernel_stat as the sysissues argument since its exported ABI
is different than the kernel one for both non-LFS and LFS
implementation).

The generic LFS implementation handles multiple cases:

  1. XSTAT_IS_XSTAT64 being 1:

    1.1. 64-bit kABI (aarch64, ia64, powerpc64*, s390x, riscv64, and
         x86_64): it issues __NR_newfstatat for _STAT_VER_KERNEL or
         _STAT_VER_LINUX.

    1.2. 64-bit kABI outlier (sparc64): it issuess fstatat64 with a
         temporary stat64 and convert to output stat64 based on the
         input version (and using a sparc64 specific __xstat32_conv).

    1.3. New 32-bit kABIs with only 64-bit time_t support (arc and
	 riscv32): it issues __NR_statx and covert to struct stat64.

  2. Old ABIs with XSTAT_IS_XSTAT64 being 0 (arm, csky, i386, hppa, m68k,
     microblaze, mips32, nios2, sh, powerpc32, and sparc32): it issues
     __NR_fstat64.

Also, two special cases requires specific implementations:

  1. alpha: it uses the __NR_fstatat64 syscall instead.

  2. mips64: as for non-LFS implementation its ABIs differ from
     glibc exported one, which requires an specific conversion
     function to handle the kernel_stat.

Checked with a build for all affected ABIs. I also checked on x86_64,
i686, powerpc, powerpc64le, sparcv9, sparc64, s390, and s390x.

Reviewed-by: Lukasz Majewski <lukma@denx.de>
2020-09-11 14:35:24 -03:00
..
alpha alpha: Refactor syscall and Use Linux kABI for syscall return 2020-02-14 21:09:12 -03:00
arm linux: Consolidate INLINE_SYSCALL 2020-02-14 21:09:12 -03:00
bsd signal: Add signum-{generic,arch}.h 2020-07-07 14:10:58 -03:00
i386 i386: Remove unused file sysdeps/unix/i386/sysdep.S 2020-05-28 13:44:29 +02:00
inet Remove obsolete, never-implemented XSI STREAMS declarations 2019-03-14 15:44:15 +01:00
mips linux: Consolidate INLINE_SYSCALL 2020-02-14 21:09:12 -03:00
powerpc Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sh linux: Consolidate INLINE_SYSCALL 2020-02-14 21:09:12 -03:00
sysv/linux linux: Consolidate fxstatat{64} 2020-09-11 14:35:24 -03:00
x86_64 linux: Consolidate INLINE_SYSCALL 2020-02-14 21:09:12 -03:00
confstr.h
get_child_max.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
getlogin_r.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
getlogin.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
getpagesize.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
grantpt.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ifreq.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Implies
make-syscalls.sh Add SYSCALL_ULONG_ARG_[12] to pass long to syscall [BZ #25810] 2020-04-29 05:35:34 -07:00
Makefile Add arch-syscall.h dependency for generating sysd-syscalls file 2020-05-14 18:40:58 +02:00
pt-fcntl.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
s-proto-cancel.S
s-proto.S
setxid.h
sockatmark.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscall-template.S Add SYSCALL_ULONG_ARG_[12] to pass long to syscall [BZ #25810] 2020-04-29 05:35:34 -07:00
syscall.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
syscalls.list Mark unsigned long arguments with U in more syscalls [BZ #25810] 2020-04-29 08:10:01 -07:00
sysdep.h linux: Remove INTERNAL_SYSCALL_DECL 2020-02-14 21:12:45 -03:00