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69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
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/* Machine-dependent pthreads configuration and inline functions.
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am33 version.
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Copyright (C) 1996,1997,1998,1999,2000,2001, 2004
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Alexandre Oliva <aoliva@redhat.com>
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Based on ../i386/pt-machine.h.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _PT_MACHINE_H
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#define _PT_MACHINE_H 1
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#ifndef __ASSEMBLER__
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#ifndef PT_EI
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# define PT_EI extern inline
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#endif
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/* Get some notion of the current stack. Need not be exactly the top
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of the stack, just something somewhere in the current frame. */
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#define CURRENT_STACK_FRAME __builtin_frame_address (0)
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/* Spinlock implementation; required. */
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PT_EI long int
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testandset (int *spinlock)
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{
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long int ret = 1;
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/* This won't test&set the entire int, only the least significant
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byte. I hope this doesn't matter, since we can't do better. */
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__asm__ __volatile__ ("bset %0, %1; bne 1f; clr %0; 1:" :
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"+d" (ret), "+m" (*(volatile int *)spinlock));
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return ret;
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}
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PT_EI int
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get_eflags (void)
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{
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int res;
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__asm__ __volatile__ ("mov psw,%0" : "=d" (res));
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return res;
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}
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PT_EI void
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set_eflags (int newflags)
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{
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__asm__ __volatile__ ("mov %0,psw" : : "d" (newflags) : "cc");
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}
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#endif /* __ASSEMBLER__ */
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#endif /* pt-machine.h */
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