This is my initial working version.

There is a bug in boot in this version: subhurd sometimes cannot boot.

1 files changed, 70 insertions, 0 deletions

diff --git a/libpthread/sysdeps/l4/pt-stack-alloc.c b/libpthread/sysdeps/l4/pt-stack-alloc.c
new file mode 100644
index 00000000..e28d5310
--- /dev/null
+++ b/libpthread/sysdeps/l4/pt-stack-alloc.c
@@ -0,0 +1,70 @@
+/* Allocate a new stack.  L4 Hurd version.
+   Copyright (C) 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 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/l4.h>
+#include <errno.h>
+
+#include <pt-internal.h>
+
+#define __pthread_stacksize __pthread_default_attr.stacksize
+
+#include <l4/sigma0.h>
+#include <hurd/debug.h>
+
+static void *
+allocate_page (void)
+{
+  L4_Fpage_t p;
+  /* The Kernel Interface page.  */
+  static L4_KernelInterfacePage_t *kip;
+
+  if (! kip)
+    kip = L4_GetKernelInterface ();
+
+#define sigma0_tid() (L4_GlobalId (kip->ThreadInfo.X.UserBase, 1))
+  p =  L4_Sigma0_GetPage (sigma0_tid (),
+			  L4_Fpage_Set_Attrs (L4_FpageLog2 (-1UL << 10,
+							    PAGE_SHIFT),
+					     L4_FullyAccessible));
+  p.raw &= ~0x3ff;
+
+  printf ("%s: Allocated page %x\n",
+	  __FUNCTION__, p.raw);
+
+  return (void *) p.raw;
+}
+
+
+/* Allocate a new stack of size STACKSIZE.  If successfull, store the
+   address of the newly allocated stack in *STACKADDR and return 0.
+   Otherwise return an error code (EINVAL for an invalid stack size,
+   EAGAIN if the system lacked the necessary resources to allocate a
+   new stack).  */
+int
+__pthread_stack_alloc (void **stackaddr, size_t stacksize)
+{
+  if (stacksize != __pthread_stacksize)
+    return EINVAL;
+
+  *stackaddr = allocate_page ();
+  if (! *stackaddr)
+    return EAGAIN;
+  
+  return 0;
+}