mirror of git://sourceware.org/git/glibc.git
5f85cc2f47
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>
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|---|---|---|
| .. | ||
| alpha | ||
| alphaev6/fpu | ||
| alphaev67/fpu | ||
| bits | ||
| fpu | ||
| sys | ||
| Implies | ||
| Makefile | ||
| Versions | ||
| ____longjmp_chk.S | ||
| a.out.h | ||
| adjtime.c | ||
| adjtimex.c | ||
| aio_cancel.c | ||
| arch-syscall.h | ||
| brk.S | ||
| c++-types.data | ||
| clone.S | ||
| configure | ||
| configure.ac | ||
| dl-auxv.h | ||
| dl-brk.S | ||
| dl-support.c | ||
| dl-sysdep.c | ||
| errlist-compat.c | ||
| fraiseexcpt.S | ||
| fstatfs64.c | ||
| fstatvfs.c | ||
| fstatvfs64.c | ||
| fxstat64.c | ||
| fxstatat64.c | ||
| getclktck.c | ||
| getcontext.S | ||
| getdents.c | ||
| getdents64.c | ||
| getegid.S | ||
| geteuid.S | ||
| gethostname.c | ||
| getppid.S | ||
| getrlimit64.c | ||
| getsysstats.c | ||
| gettimeofday.c | ||
| glob-lstat-compat.c | ||
| globfree.c | ||
| ieee_get_fp_control.S | ||
| ieee_set_fp_control.S | ||
| internal_statvfs64.c | ||
| ioperm.c | ||
| ipc_priv.h | ||
| jmp_buf-macros.h | ||
| kernel-features.h | ||
| kernel_sigaction.h | ||
| kernel_stat.h | ||
| kernel_sysinfo.h | ||
| kernel_termios.h | ||
| ld.abilist | ||
| libBrokenLocale.abilist | ||
| libanl.abilist | ||
| libc.abilist | ||
| libcrypt.abilist | ||
| libdl.abilist | ||
| libm.abilist | ||
| libnsl.abilist | ||
| libpthread.abilist | ||
| libresolv.abilist | ||
| librt.abilist | ||
| libthread_db.abilist | ||
| libutil.abilist | ||
| localplt.data | ||
| lxstat64.c | ||
| makecontext.S | ||
| nldbl-abi.h | ||
| oldglob.c | ||
| osf_adjtime.c | ||
| osf_getitimer.c | ||
| osf_getrusage.c | ||
| osf_gettimeofday.c | ||
| osf_setitimer.c | ||
| osf_settimeofday.c | ||
| osf_utimes.c | ||
| osf_wait4.c | ||
| pipe.S | ||
| register-dump.h | ||
| rt_sigaction.S | ||
| select.c | ||
| setcontext.S | ||
| setfpucw.c | ||
| setrlimit64.c | ||
| settimeofday.c | ||
| shlib-versions | ||
| sigcontextinfo.h | ||
| sizes.h | ||
| statfs64.c | ||
| statvfs.c | ||
| statvfs64.c | ||
| swapcontext.S | ||
| syscall.S | ||
| syscalls.list | ||
| sysconf.c | ||
| sysdep.h | ||
| timer_create.c | ||
| timer_delete.c | ||
| timer_getoverr.c | ||
| timer_gettime.c | ||
| timer_settime.c | ||
| ucontext-offsets.sym | ||
| vfork.S | ||
| wait4.c | ||
| wordexp.c | ||
| xstat64.c | ||
| xstatconv.c | ||
| xstatconv.h | ||