x86-64: decode clone LDT user_desc entries for x86 processes

* mem.c [X86_64]: Include asm/ldt.h.
[X86_64] (print_ldt_entry, sys_modify_ldt, sys_set_thread_area,
sys_get_thread_area): Define.
* process.c [X86_64]: Include asm/ldt.h.
(sys_clone) [X86_64]: Decode LDT entry if current_personality == 1.

Signed-off-by: Elliott Hughes <enh@google.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
2 files changed