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

2 files changed, 121 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/arm/bits/armsigctx.h b/libpthread/linuxthreads/sysdeps/arm/bits/armsigctx.h
new file mode 100644
index 000000000..4530cdbda
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/arm/bits/armsigctx.h
@@ -0,0 +1,73 @@
+/* Definition of `struct sigcontext' for Linux/ARM
+   Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/* The format of struct sigcontext changed between 2.0 and 2.1 kernels.
+   Fortunately 2.0 puts a magic number in the first word and this is not
+   a legal value for `trap_no', so we can tell them apart.  */
+
+/* Early 2.2 and 2.3 kernels do not have the `fault_address' member in
+   the sigcontext structure.  Unfortunately there is no reliable way
+   to test for its presence and this word will contain garbage for too-old
+   kernels.  Versions 2.2.14 and 2.3.35 (plus later versions) are known to
+   include this element.  */
+
+#ifndef __ARMSIGCTX_H
+#define __ARMSIGCTX_H	1
+
+#include <asm/ptrace.h>
+
+union k_sigcontext
+  {
+    struct
+      {
+	unsigned long int trap_no;
+	unsigned long int error_code;
+	unsigned long int oldmask;
+	unsigned long int arm_r0;
+	unsigned long int arm_r1;
+	unsigned long int arm_r2;
+	unsigned long int arm_r3;
+	unsigned long int arm_r4;
+	unsigned long int arm_r5;
+	unsigned long int arm_r6;
+	unsigned long int arm_r7;
+	unsigned long int arm_r8;
+	unsigned long int arm_r9;
+	unsigned long int arm_r10;
+	unsigned long int arm_fp;
+	unsigned long int arm_ip;
+	unsigned long int arm_sp;
+	unsigned long int arm_lr;
+	unsigned long int arm_pc;
+	unsigned long int arm_cpsr;
+	unsigned long fault_address;
+      } v21;
+    struct
+      {
+	unsigned long int magic;
+	struct pt_regs reg;
+	unsigned long int trap_no;
+	unsigned long int error_code;
+	unsigned long int oldmask;
+      } v20;
+};
+
+#define SIGCONTEXT_2_0_MAGIC	0x4B534154
+
+#endif	/* bits/armsigctx.h */
diff --git a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
new file mode 100644
index 000000000..d4dc4c4ed
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
@@ -0,0 +1,48 @@
+/* Machine-dependent pthreads configuration and inline functions.
+   ARM version.
+   Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Philip Blundell <philb@gnu.org>.
+
+   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.  */
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+
+/* 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.  */
+PT_EI 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");