mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-29 10:37:50 +00:00
9a29bc3732
1998-10-09 Ulrich Drepper <drepper@cygnus.com> * posix/ptestcases.h: Fix typo. 1998-10-08 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * posix/regex.c (regcomp): Allocate and prepare a fastmap. (regexec): Allocate regs.start and regs.end as one block. 1998-10-08 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * sysdeps/unix/sysv/linux/bits/socket.h: Remove comma at end of enum decl. 1998-10-08 Philip Blundell <pb@nexus.co.uk> * sysdeps/unix/sysv/linux/arm/profil-counter.h: Move definition of sigcontext union to ... * sysdeps/unix/sysv/linux/arm/bits/armsigctx.h: ... here. New file. * sysdeps/unix/sysv/linux/arm/register-dump.h: Add support for version 2.0 kernels.
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* Machine-dependent pthreads configuration and inline functions.
|
|
|
|
Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ralf Baechle <ralf@gnu.ai.mit.edu>.
|
|
Based on the Alpha version by Richard Henderson <rth@tamu.edu>.
|
|
|
|
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; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc.,
|
|
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
TODO: This version makes use of MIPS ISA 2 features. It won't
|
|
work on ISA 1. These machines will have to take the overhead of
|
|
a sysmips(MIPS_ATOMIC_SET, ...) syscall which isn't implemented
|
|
yet correctly. There is however a better solution for R3000
|
|
uniprocessor machines possible. */
|
|
|
|
#ifndef PT_EI
|
|
# define PT_EI extern inline
|
|
#endif
|
|
|
|
|
|
/* Spinlock implementation; required. */
|
|
PT_EI long int
|
|
testandset (int *spinlock)
|
|
{
|
|
long int ret, temp;
|
|
|
|
__asm__ __volatile__(
|
|
"# Inline spinlock test & set\n\t"
|
|
".set\tmips2\n"
|
|
"1:\tll\t%0,%3\n\t"
|
|
"bnez\t%0,2f\n\t"
|
|
".set\tnoreorder\n\t"
|
|
"li\t%1,1\n\t"
|
|
".set\treorder\n\t"
|
|
"sc\t%1,%2\n\t"
|
|
"beqz\t%1,1b\n"
|
|
"2:\t.set\tmips0\n\t"
|
|
"/* End spinlock test & set */"
|
|
: "=&r"(ret), "=&r" (temp), "=m"(*spinlock)
|
|
: "m"(*spinlock)
|
|
: "memory");
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* 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__ ("$29");
|
|
|
|
|
|
/* 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)
|
|
{
|
|
long ret;
|
|
|
|
__asm__ __volatile__ (
|
|
"/* Inline compare & swap */\n\t"
|
|
".set\tmips2\n"
|
|
"1:\tll\t%0,%4\n\t"
|
|
".set\tnoreorder\n\t"
|
|
"bne\t%0,%2,2f\n\t"
|
|
"move\t%0,%3\n\t"
|
|
".set\treorder\n\t"
|
|
"sc\t%0,%1\n\t"
|
|
"beqz\t%0,1b\n"
|
|
"2:\t.set\tmips0\n\t"
|
|
"/* End compare & swap */"
|
|
: "=&r"(ret), "=m"(*p)
|
|
: "r"(oldval), "r"(newval), "m"(*p));
|
|
|
|
return ret;
|
|
}
|