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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-07-15 16:34:47 +0000 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-09-11 14:35:20 -0300 |
| commit | 5febe6a38ff2f87bdb8dd971632c97c916eafd9a (patch) | |
| tree | bd57e798673dae821922e3449a1fa118d6bc65cf /sysdeps/unix/sysv/linux/sparc | |
| parent | 4f40e6adc4d00176bf11d7ad51dd67234c8cecc7 (diff) | |
| download | glibc-5febe6a38ff2f87bdb8dd971632c97c916eafd9a.tar.gz glibc-5febe6a38ff2f87bdb8dd971632c97c916eafd9a.tar.xz glibc-5febe6a38ff2f87bdb8dd971632c97c916eafd9a.zip | |
linux: Consolidate fxstat{64}
The LFS support is implemented on fxstat64.c, instead of fxstat.c for
64-bit architectures. The fxstat.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 issuess __NR_fstat64 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,
microblaze, s390, sh, powerpc, and sparc32). For _STAT_VER_KERNEL
it issues __NR_fstat, otherwise it calls __NR_fstat64 and convert
to non-LFS stat struct and handle possible overflows on st_ino,
st_size, or st_blocks.
Also non-LFS mips 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 issuess __NR_fstat for _STAT_VER_KERNEL or
_STAT_VER_LINUX.
1.2. Old 64-bit kABI with defines __NR_fstat64 instead of __NR_fstat
(sparc64): it issues __NR_fstat for _STAT_VER_KERNEL or
__NR_fstat64 and convert to struct stat64.
1.3. New 32-bit kABIs with only 64-bit time_t support (arc and
riscv32): it issuess __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 requires to handle _STAT_VER_KERNEL64 to issues
__NR_fstat64 and use the kernel_stat with __NR_fstat otherwise.
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>
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc32/fxstat.c | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc64/fxstat.c | 1 |
2 files changed, 0 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/fxstat.c b/sysdeps/unix/sysv/linux/sparc/sparc32/fxstat.c deleted file mode 100644 index 4f219f0b9d..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/fxstat.c +++ /dev/null @@ -1 +0,0 @@ -#include <sysdeps/unix/sysv/linux/i386/fxstat.c> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/fxstat.c b/sysdeps/unix/sysv/linux/sparc/sparc64/fxstat.c deleted file mode 100644 index e328ccbab0..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/fxstat.c +++ /dev/null @@ -1 +0,0 @@ -#include "../../i386/fxstat.c" |