Merge in the pthread library. This is the linuxthreads library taken from

glibc 2.1.3 and ported to work with uClibc by Stefan Soucek and Erik Andersen
(me).  Stefan has hacked things up such that linuxthreads runs on MMU-less
systems (tested only on arm-nommu).  Erik cleaned things up and made it work
properly as a shared library.
 -Erik

1 files changed, 90 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/mips/pt-machine.h b/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
new file mode 100644
index 000000000..527392308
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/mips/pt-machine.h
@@ -0,0 +1,90 @@
+/* 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;
+}