Loading...
/* 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, see <http://www.gnu.org/licenses/>. */ #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 extern long int testandset (int *); extern int __compare_and_swap (long int *, long int, long int); /* 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 */ |