+++ /dev/null
-/* 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
-
-/* 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;
-}
-
-/* Return the thread descriptor for the current thread.
-
- The contained asm must *not* be marked volatile since otherwise
- assignments like
- pthread_descr self = thread_self();
- do not get optimized away. */
-# define THREAD_SELF \
-({ \
- register pthread_descr __self; \
- __asm__ ("movq %%fs:%c1,%0" : "=r" (__self) \
- : "i" (offsetof (struct _pthread_descr_struct, \
- p_header.data.self))); \
- __self; \
-})
-
-/* Prototype for the system call. */
-extern int arch_prctl (int __code, unsigned long __addr);
-
-/* Initialize the thread-unique value. */
-# define INIT_THREAD_SELF(descr, nr) \
-{ \
- if (arch_prctl (ARCH_SET_FS, (unsigned long)descr) != 0) \
- abort (); \
-}
-
-/* Read member of the thread descriptor directly. */
-# define THREAD_GETMEM(descr, member) \
-({ \
- __typeof__ (descr->member) __value; \
- if (sizeof (__value) == 1) \
- __asm__ __volatile__ ("movb %%fs:%P2,%b0" \
- : "=q" (__value) \
- : "0" (0), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %%fs:%P2,%k0" \
- : "=r" (__value) \
- : "0" (0), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else \
- { \
- if (sizeof (__value) != 8) \
- /* There should not be any value with a size other than 1, 4 or 8. */\
- abort (); \
- \
- __asm__ __volatile__ ("movq %%fs:%P1,%0" \
- : "=r" (__value) \
- : "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- } \
- __value; \
-})
-
-/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
-# define THREAD_GETMEM_NC(descr, member) \
-({ \
- __typeof__ (descr->member) __value; \
- if (sizeof (__value) == 1) \
- __asm__ __volatile__ ("movb %%fs:(%2),%b0" \
- : "=q" (__value) \
- : "0" (0), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %%fs:(%2),%k0" \
- : "=r" (__value) \
- : "0" (0), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else \
- { \
- if (sizeof (__value) != 8) \
- /* There should not be any value with a size other than 1, 4 or 8. */\
- abort (); \
- \
- __asm__ __volatile__ ("movq %%fs:(%1),%0" \
- : "=r" (__value) \
- : "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- } \
- __value; \
-})
-
-/* Set member of the thread descriptor directly. */
-# define THREAD_SETMEM(descr, member, value) \
-({ \
- __typeof__ (descr->member) __value = (value); \
- if (sizeof (__value) == 1) \
- __asm__ __volatile__ ("movb %0,%%fs:%P1" : \
- : "q" (__value), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %k0,%%fs:%P1" : \
- : "r" (__value), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else \
- { \
- if (sizeof (__value) != 8) \
- /* There should not be any value with a size other than 1, 4 or 8. */\
- abort (); \
- \
- __asm__ __volatile__ ("movq %0,%%fs:%P1" : \
- : "r" (__value), \
- "i" (offsetof (struct _pthread_descr_struct, \
- member))); \
- } \
-})
-
-/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
-# define THREAD_SETMEM_NC(descr, member, value) \
-({ \
- __typeof__ (descr->member) __value = (value); \
- if (sizeof (__value) == 1) \
- __asm__ __volatile__ ("movb %0,%%fs:(%1)" : \
- : "q" (__value), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else if (sizeof (__value) == 4) \
- __asm__ __volatile__ ("movl %k0,%%fs:(%1)" : \
- : "r" (__value), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- else \
- { \
- if (sizeof (__value) != 8) \
- /* There should not be any value with a size other than 1, 4 or 8. */\
- abort (); \
- \
- __asm__ __volatile__ ("movq %0,%%fs:(%1)" : \
- : "r" (__value), \
- "r" (offsetof (struct _pthread_descr_struct, \
- member))); \
- } \
-})
-
-#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 */
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