mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-03 02:11:08 +00:00
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* Machine-dependent pthreads configuration and inline functions.
|
|
am33 version.
|
|
Copyright (C) 1996,1997,1998,1999,2000,2001, 2004
|
|
Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Alexandre Oliva <aoliva@redhat.com>
|
|
Based on ../i386/pt-machine.h.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library 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
|
|
|
|
#ifndef __ASSEMBLER__
|
|
#ifndef PT_EI
|
|
# define PT_EI extern 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 __builtin_frame_address (0)
|
|
|
|
/* Spinlock implementation; required. */
|
|
PT_EI long int
|
|
testandset (int *spinlock)
|
|
{
|
|
long int ret = 1;
|
|
|
|
/* This won't test&set the entire int, only the least significant
|
|
byte. I hope this doesn't matter, since we can't do better. */
|
|
__asm__ __volatile__ ("bset %0, %1; bne 1f; clr %0; 1:" :
|
|
"+d" (ret), "+m" (*(volatile int *)spinlock));
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
PT_EI int
|
|
get_eflags (void)
|
|
{
|
|
int res;
|
|
__asm__ __volatile__ ("mov psw,%0" : "=d" (res));
|
|
return res;
|
|
}
|
|
|
|
|
|
PT_EI void
|
|
set_eflags (int newflags)
|
|
{
|
|
__asm__ __volatile__ ("mov %0,psw" : : "d" (newflags) : "cc");
|
|
}
|
|
|
|
#endif /* __ASSEMBLER__ */
|
|
|
|
#endif /* pt-machine.h */
|