1 files changed, 67 insertions, 0 deletions
diff --git a/sysdeps/mach/htl/pt-stack-alloc.c b/sysdeps/mach/htl/pt-stack-alloc.c
new file mode 100644
index 0000000000..dc31ab745a
--- /dev/null
+++ b/sysdeps/mach/htl/pt-stack-alloc.c
@@ -0,0 +1,67 @@
+/* Allocate a new stack.  Mach version.
+   Copyright (C) 2000-2018 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+
+#include <mach.h>
+#include <mach/machine/vm_param.h>
+
+#include <pt-internal.h>
+
+/* The next address to use for stack allocation.  */
+static vm_address_t next_stack_base = VM_MIN_ADDRESS;
+
+
+/* Allocate a new stack of size STACKSIZE.  If successful, 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)
+{
+  vm_offset_t base;
+  int i = 0;
+
+get_stack:
+  i++;
+  for (base = next_stack_base;
+       base < VM_MAX_ADDRESS
+       && __vm_allocate (__mach_task_self (), &base,
+			 stacksize, FALSE) != KERN_SUCCESS; base += stacksize)
+    ;
+
+  if (base >= VM_MAX_ADDRESS)
+    {
+      if (i == 1)
+	{
+	  next_stack_base = VM_MIN_ADDRESS;
+	  goto get_stack;
+	}
+      else
+	return EAGAIN;
+    }
+
+  if (base >= VM_MAX_ADDRESS)
+    return EAGAIN;
+
+  next_stack_base = base + stacksize;
+
+  (*stackaddr) = (void *) base;
+  return 0;
+}