initial import of latest linuxthreads

1 files changed, 125 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/s390/s390-64/pt-machine.h b/libpthread/linuxthreads/sysdeps/s390/s390-64/pt-machine.h
new file mode 100644
index 000000000..49f8ae2b9
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/s390/s390-64/pt-machine.h
@@ -0,0 +1,125 @@
+/* Machine-dependent pthreads configuration and inline functions.
+   64 bit S/390 version.
+   Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+   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; 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_MACHINE_H
+#define _PT_MACHINE_H   1
+
+#ifndef PT_EI
+# define PT_EI extern inline __attribute__ ((always_inline))
+#endif
+
+extern long int testandset (int *spinlock);
+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+
+/* For multiprocessor systems, we want to ensure all memory accesses
+   are completed before we reset a lock.  On other systems, we still
+   need to make sure that the compiler has flushed everything to memory.  */
+#define MEMORY_BARRIER() __asm__ __volatile__ ("bcr 15,0" : : : "memory")
+
+/* Spinlock implementation; required.  */
+PT_EI long int
+testandset (int *spinlock)
+{
+  int ret;
+
+  __asm__ __volatile__(
+       "    la    1,%1\n"
+       "    lhi   0,1\n"
+       "    l     %0,%1\n"
+       "0:  cs    %0,0,0(1)\n"
+       "    jl    0b"
+       : "=&d" (ret), "+m" (*spinlock)
+       : : "0", "1", "cc");
+
+  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__ ("15");
+
+#ifdef USE_TLS
+/* Return the thread descriptor for the current thread.  */
+# define THREAD_SELF ((pthread_descr) __builtin_thread_pointer ())
+
+/* Initialize the thread-unique value.  */
+#define INIT_THREAD_SELF(descr, nr) __builtin_set_thread_pointer (descr)
+#else
+/* Return the thread descriptor for the current thread.
+   64 bit S/390 uses access register 0 and 1 as "thread register".  */
+#define THREAD_SELF  ({                                                       \
+  register pthread_descr __self;                                              \
+  __asm__ ("   ear  %0,%%a0\n"                                                \
+           "   sllg %0,%0,32\n"                                               \
+           "   ear  %0,%%a1\n"                                                \
+           : "=d" (__self) );                                                 \
+  __self;                                                                     \
+})
+
+/* Initialize the thread-unique value.  */
+#define INIT_THREAD_SELF(descr, nr)  ({                                       \
+  __asm__ ("   sar  %%a1,%0\n"                                                \
+           "   srlg 0,%0,32\n"                                                \
+           "   sar  %%a0,0\n"                                                 \
+           : : "d" (descr) : "0" );                                           \
+})
+#endif
+
+/* Access to data in the thread descriptor is easy.  */
+#define THREAD_GETMEM(descr, member) \
+  ((void) sizeof (descr), THREAD_SELF->member)
+#define THREAD_GETMEM_NC(descr, member) \
+  ((void) sizeof (descr), THREAD_SELF->member)
+#define THREAD_SETMEM(descr, member, value) \
+  ((void) sizeof (descr), THREAD_SELF->member = (value))
+#define THREAD_SETMEM_NC(descr, member, value) \
+  ((void) sizeof (descr), THREAD_SELF->member = (value))
+
+/* We want the OS to assign stack addresses.  */
+#define FLOATING_STACKS 1
+
+/* Maximum size of the stack if the rlimit is unlimited.  */
+#define ARCH_STACK_MAX_SIZE     8*1024*1024
+
+/* 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)
+{
+        int retval;
+
+        __asm__ __volatile__(
+                "  lgr  0,%2\n"
+                "  csg  0,%3,%1\n"
+                "  ipm  %0\n"
+                "  srl  %0,28\n"
+                "0:"
+                : "=&d" (retval), "+m" (*p)
+                : "d" (oldval) , "d" (newval)
+                : "cc", "0");
+        return retval == 0;
+}
+
+#endif /* pt-machine.h */