a09411756f
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c: Do not define fxstat if XSTAT_IS_XSTAT64 is set to non-zero. * sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c: Ditto for fxstatat. * sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c: Ditto for lxstat. * sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c: Ditto for xstat. * sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat64.c: New file. * sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c: New file. * sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c: Make __lxstat an alias of __lxstat64 if XSTAT_IS_XSTAT64 is set to non-zero. * sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c: Ditto for __xstat.
This hierarchy supports Linux systems using the new asm-generic/unistd.h, which removes many familiar old syscalls. For example, to implement open(), newer Linux architectures require glibc to invoke the __NR_openat syscall with AT_FDCWD. This hierarchy provides all those implementations. It also provides support for 32-bit platforms using the 64-bit kernel syscall APIs, as the 32-bit ones are no longer provided. Note that newer ILP32 environments (x32 or AArch64:ILP32, for example) are converting to use more 64-bit types in kernel syscalls, so that aspect of this support is in more flux as of this writing.