From caa27d8e149e40b6bbbe59b76e1aca54ecf2c358 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 11 Mar 1998 12:42:24 +0000 Subject: [PATCH] LinuxThreads library. --- sysdeps/arm/linuxthreads/Implies | 1 + sysdeps/arm/linuxthreads/pt-machine.h | 44 +++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 sysdeps/arm/linuxthreads/Implies create mode 100644 sysdeps/arm/linuxthreads/pt-machine.h diff --git a/sysdeps/arm/linuxthreads/Implies b/sysdeps/arm/linuxthreads/Implies new file mode 100644 index 0000000..7edcd7e --- /dev/null +++ b/sysdeps/arm/linuxthreads/Implies @@ -0,0 +1 @@ +pthread/no-cmpxchg diff --git a/sysdeps/arm/linuxthreads/pt-machine.h b/sysdeps/arm/linuxthreads/pt-machine.h new file mode 100644 index 0000000..0b9bc01 --- /dev/null +++ b/sysdeps/arm/linuxthreads/pt-machine.h @@ -0,0 +1,44 @@ +/* Machine-dependent pthreads configuration and inline functions. + ARM version. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Philip Blundell . + + 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. */ + + +/* This will not work on ARM1 or ARM2 because SWP is lacking on those + machines. Unfortunately we have no way to detect this at compile + time; let's hope nobody tries to use one. */ + +/* Spinlock implementation; required. */ +extern inline int +testandset (int *spinlock) +{ + register unsigned int ret; + + __asm__ __volatile__("swp %0, %1, [%2]" + : "=r"(ret) + : "0"(1), "r"(spinlock)); + + 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__ ("sp"); -- 2.7.4