1 files changed, 93 insertions, 0 deletions
diff --git a/libpthread/sysdeps/l4/hurd/powerpc/pt-setup.c b/libpthread/sysdeps/l4/hurd/powerpc/pt-setup.c
new file mode 100644
index 00000000..d3cf4ec3
--- /dev/null
+++ b/libpthread/sysdeps/l4/hurd/powerpc/pt-setup.c
@@ -0,0 +1,93 @@
+/* Setup thread stack.  Hurd/PowerPC version.
+   Copyright (C) 2003 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 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.  */
+
+#include <l4.h>
+
+#include <pt-internal.h>
+
+/* Arguments is passed in registers on the PowerPC.  But the
+   exchange registers syscall only allows us to set the PC and the
+   stack pointer so we put the entry point and start function on
+   the stack.  */
+struct start_info
+{
+  void (*entry_point) (void *(*)(void *), void *);
+  void *(*start_routine) (void *);
+  void *arg;
+};
+
+void first_entry_1 (void);
+
+/* Stage 1 entry function.  The start_info structure is inlined on the
+   stack.  Put values into registers and call entry function.  */
+asm ("				;\
+first_entry_1:			;\
+	lwz	0, 0(1)		;\
+	lwz	3, 4(1)		;\
+	lwz	4, 8(1)		;\
+	mtctr	0		;\
+	bctrl			;\
+");
+
+/* Set up the stack for THREAD, such that it appears as if
+   START_ROUTINE and ARG were passed to the new thread's entry-point.
+   Return the stack pointer for the new thread.  We also take the
+   opportunity to install THREAD in our utcb.  */
+static void *
+stack_setup (struct __pthread *thread,
+	     void (*entry_point)(void *(*)(void *), void *),
+	     void *(*start_routine)(void *), void *arg)
+{
+  l4_word_t *top;
+
+  /* Calculate top of the new stack.  */
+  top = (l4_word_t *) ((l4_word_t) thread->stackaddr + thread->stacksize);
+
+  /* Initial stack frame.  */
+  top[-4] = 0;
+  top = top - 4;
+
+  if (start_routine)
+    {
+      struct start_info *info = ((struct start_info *) top) - 1;
+
+      info->entry_point = entry_point;
+      info->start_routine = start_routine;
+      info->arg = arg;
+      return (void *) info;
+    }
+  return top;
+}
+
+int
+__pthread_setup (struct __pthread *thread,
+		 void (*entry_point)(void *(*)(void *), void *),
+		 void *(*start_routine)(void *), void *arg)
+{
+  thread->mcontext.pc = first_entry_1;
+  thread->mcontext.sp = stack_setup (thread, entry_point,
+				     start_routine, arg);
+
+  if (l4_same_threads (thread->threadid, l4_myself ()))
+    l4_set_user_defined_handle ((l4_word_t) thread);
+  else
+    l4_set_user_defined_handle_of (thread->threadid, 
+				   (l4_word_t) thread);
+  return 0;
+}