From 6073bae64ccf27d6ebf5e49592a715801e14a5ba Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Sat, 18 Jul 2020 08:20:46 -0300 Subject: linux: Disentangle fstatat from fxstatat It implements all the required syscall for the all Linux kABIS on fstatat{64} instead of calling fxstatat{64}. On non-LFS implementation, it handles 3 cases: 1. New kABIs which uses generic pre 64-bit time Linux ABI (csky and nios): it issues __NR_fstat64 plus handle the overflow on st_ino, st_size, or st_blocks. 2. Old KABIs with old non-LFS support (arm, i386, hppa, m68k, microblaze, mips32, s390, sh, powerpc, and sparc32): it issues __NR_fstatat64 and convert the result to struct stat. 3. 64-bit kABI outliers (mips64 and mips64-n32): it issues __NR_newfstatat and convert the result to struct stat. 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. 1.2. 64-bit kABI outlier (alpha): it issues __NR_fstatat64. 1.3. 64-bit kABI outlier where struct stat64 does not match kernel one (sparc64): it issues __NR_fstatat64 and convert the result to struct stat64. 1.4. 32-bit kABI with default 64-bit time_t (arc, riscv32): it issues __NR_statx and convert the result to struct stat64. 2. Old ABIs with XSTAT_IS_XSTAT64 being 0: 2.1. All kABIs with non-LFS support (arm, csky, i386, hppa, m68k, microblaze, nios2, sh, powerpc32, and sparc32): it issues __NR_fstatat64. 2.2. 64-bit kABI outliers (mips64 and mips64-n32): it issues __NR_newfstatat and convert the result to struct stat64. It allows to remove all the hidden definitions from the {f,l}xstat{64} (some are still kept because Hurd requires it). 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 --- sysdeps/unix/sysv/linux/lxstat64.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'sysdeps/unix/sysv/linux/lxstat64.c') diff --git a/sysdeps/unix/sysv/linux/lxstat64.c b/sysdeps/unix/sysv/linux/lxstat64.c index d0d8b5f..2b06133 100644 --- a/sysdeps/unix/sysv/linux/lxstat64.c +++ b/sysdeps/unix/sysv/linux/lxstat64.c @@ -91,8 +91,6 @@ weak_alias (___lxstat64, __GI___lxstat); versioned_symbol (libc, ___lxstat64, __lxstat64, GLIBC_2_2); strong_alias (___lxstat64, __old__lxstat64) compat_symbol (libc, __old__lxstat64, __lxstat64, GLIBC_2_1); -hidden_ver (___lxstat64, __lxstat64) #else strong_alias (___lxstat64, __lxstat64); -hidden_def (__lxstat64) #endif -- cgit v1.1