| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485 |
- /* Machine-dependent pthreads configuration and inline functions.
- x86-64 version.
- Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- 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. */
- #ifndef _PT_MACHINE_H
- #define _PT_MACHINE_H 1
- #include <features.h>
- #ifndef __ASSEMBLER__
- # include <stddef.h> /* For offsetof. */
- # include <stdlib.h> /* For abort(). */
- # include <asm/prctl.h>
- # ifndef PT_EI
- # define PT_EI __extern_always_inline
- # endif
- /* Get some notion of the current stack. Need not be exactly the top
- of the stack, just something somewhere in the current frame. */
- # define CURRENT_STACK_FRAME stack_pointer
- register char * stack_pointer __asm__ ("%rsp") __attribute_used__;
- /* Spinlock implementation; required. */
- PT_EI long int
- testandset (int *__spinlock)
- {
- long int ret;
- __asm__ __volatile__ (
- "xchgl %k0, %1"
- : "=r"(ret), "=m"(*__spinlock)
- : "0"(1), "m"(*__spinlock)
- : "memory");
- return ret;
- }
- /* Compare-and-swap for semaphores. */
- # define HAS_COMPARE_AND_SWAP
- PT_EI int
- __compare_and_swap (long int *__p, long int __oldval, long int __newval)
- {
- char ret;
- long int readval;
- __asm__ __volatile__ ("lock; cmpxchgq %3, %1; sete %0"
- : "=q" (ret), "=m" (*__p), "=a" (readval)
- : "r" (__newval), "m" (*__p), "a" (__oldval)
- : "memory");
- return ret;
- }
- #endif /* !__ASSEMBLER__ */
- /* We want the OS to assign stack addresses. */
- #define FLOATING_STACKS 1
- /* Maximum size of the stack if the rlimit is unlimited. */
- #define ARCH_STACK_MAX_SIZE 32*1024*1024
- /* The ia32e really want some help to prevent overheating. */
- #define BUSY_WAIT_NOP __asm__ ("rep; nop")
- #endif /* pt-machine.h */
|
