| /* Copyright (C) 2002-2014 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* 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. |
| |
| Some processors such as Intel Atom pay a big penalty on every |
| access using a segment override if that segment's base is not |
| aligned to the size of a cache line. (See Intel 64 and IA-32 |
| Architectures Optimization Reference Manual, section 13.3.3.3, |
| "Segment Base".) On such machines, a cache line is 64 bytes. */ |
| #define TCB_ALIGNMENT 64 |
| |
| |
| /* Location of current stack frame. */ |
| #define CURRENT_STACK_FRAME __builtin_frame_address (0) |
| |
| |
| /* XXX Until we have a better place keep the definitions here. */ |
| |
| /* While there is no such syscall. */ |
| #define __exit_thread_inline(val) \ |
| while (1) { \ |
| if (__builtin_constant_p (val) && (val) == 0) \ |
| asm volatile ("xorl %%ebx, %%ebx; int $0x80" :: "a" (__NR_exit)); \ |
| else \ |
| asm volatile ("movl %1, %%ebx; int $0x80" \ |
| :: "a" (__NR_exit), "r" (val)); \ |
| } |
