1 /* Machine-dependent pthreads configuration and inline functions.
3 Copyright (C) 2004 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Alexandre Oliva <aoliva@redhat.com>
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public License as
9 published by the Free Software Foundation; either version 2.1 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If
19 not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 #define _PT_MACHINE_H 1
30 # if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
31 # define PT_EI static inline __attribute__((always_inline))
33 # define PT_EI extern inline __attribute__((always_inline))
37 /* Spinlock implementation; required. */
39 testandset (int *spinlock)
42 asm ("swap%I0 %M0, %1" : "+m"(*(volatile int *)spinlock), "+r"(i));
46 /* We want the OS to assign stack addresses. */
47 #define FLOATING_STACKS 1
49 /* This symbol is defined by the ABI as the stack size requested by
51 extern char __stacksize;
52 #define ARCH_STACK_MAX_SIZE ((unsigned long)&__stacksize)
54 /* Memory barrier; default is to do nothing */
55 #define MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory")
57 #define WRITE_MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory")
59 /* Return the thread descriptor for the current thread. */
60 register struct _pthread_descr_struct *THREAD_SELF asm ("gr29");
61 #define THREAD_SELF THREAD_SELF
63 /* Initialize the thread-unique value. */
64 #define INIT_THREAD_SELF(descr, nr) \
67 /* Get some notion of the current stack. Need not be exactly the top
68 of the stack, just something somewhere in the current frame. */
69 #define CURRENT_STACK_FRAME stack_pointer
70 register char * stack_pointer __asm__ ("sp");
74 #endif /* pt-machine.h */