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, see <http://www.gnu.org/licenses/>. */
22 #define _PT_MACHINE_H 1
29 # define PT_EI __extern_always_inline
32 /* Spinlock implementation; required. */
34 testandset (int *spinlock)
37 __asm__ ("swap%I0 %M0, %1" : "+m"(*(volatile int *)spinlock), "+r"(i));
41 /* We want the OS to assign stack addresses. */
42 #define FLOATING_STACKS 1
44 /* This symbol is defined by the ABI as the stack size requested by
46 extern char __stacksize;
47 #define ARCH_STACK_MAX_SIZE ((unsigned long)&__stacksize)
49 /* Memory barrier; default is to do nothing */
50 #define MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory")
52 #define WRITE_MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory")
54 /* Return the thread descriptor for the current thread. */
55 register struct _pthread_descr_struct *THREAD_SELF __asm__ ("gr29");
56 #define THREAD_SELF THREAD_SELF
58 /* Initialize the thread-unique value. */
59 #define INIT_THREAD_SELF(descr, nr) \
62 /* Get some notion of the current stack. Need not be exactly the top
63 of the stack, just something somewhere in the current frame. */
64 #define CURRENT_STACK_FRAME stack_pointer
65 register char * stack_pointer __asm__ ("sp");
69 #endif /* pt-machine.h */