/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.   This file is part of the GNU C Library.   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  *//* Default stack size.  */#define ARCH_STACK_DEFAULT_SIZE	(2 * 1024 * 1024)/* Required stack pointer alignment at beginning.  SSE requires 16   bytes.  */#define STACK_ALIGN		16/* Minimal stack size after allocating thread descriptor and guard size.  */#define MINIMAL_REST_STACK	2048/* Alignment requirement for TCB.  */#define TCB_ALIGNMENT		16/* Location of current stack frame.  The frame pointer is not usable.  */#define CURRENT_STACK_FRAME \  ({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; })/* We prefer to have the stack allocated in the low 4GB since this   allows faster context switches.  */#define ARCH_MAP_FLAGS MAP_32BIT/* If it is not possible to allocate memory there retry without that   flag.  */#define ARCH_RETRY_MMAP(size) \  mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,			      \	MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)/* XXX Until we have a better place keep the definitions here.  *//* While there is no such syscall.  */#define __exit_thread_inline(val) \  asm volatile ("syscall" :: "a" (__NR_exit), "D" (val))