1 This hierarchy supports Linux systems using the new
2 asm-generic/unistd.h, which removes many familiar old syscalls. For
3 example, to implement open(), newer Linux architectures require glibc
4 to invoke the __NR_openat syscall with AT_FDCWD. This hierarchy
5 provides all those implementations.
7 It also provides support for 32-bit platforms using the 64-bit kernel
8 syscall APIs, as the 32-bit ones are no longer provided. Note that
9 newer ILP32 environments (x32 or AArch64:ILP32, for example) are
10 converting to use more 64-bit types in kernel syscalls, so that aspect
11 of this support is in more flux as of this writing.