1 files changed, 114 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/malloc_initialize.c b/cpukit/libcsupport/src/malloc_initialize.c
new file mode 100644
index 0000000000..e00a868e5a
--- /dev/null
+++ b/cpukit/libcsupport/src/malloc_initialize.c
@@ -0,0 +1,114 @@
+/**
+ * @file
+ *
+ * @brief Malloc initialization implementation.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2007.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems.h>
+#include <rtems/malloc.h>
+#include <rtems/score/wkspace.h>
+#include "malloc_p.h"
+
+/* FIXME: Dummy function */
+#ifndef RTEMS_NEWLIB
+void RTEMS_Malloc_Initialize(
+  void *heap_begin,
+  uintptr_t heap_size,
+  size_t sbrk_amount
+)
+{
+}
+#else
+rtems_malloc_statistics_t rtems_malloc_statistics;
+extern bool rtems_unified_work_area;
+
+void RTEMS_Malloc_Initialize(
+  void *heap_begin,
+  uintptr_t heap_size,
+  size_t sbrk_amount
+)
+{
+  /*
+   *  If configured, initialize the statistics support
+  */
+  if ( rtems_malloc_statistics_helpers != NULL ) {
+    (*rtems_malloc_statistics_helpers->initialize)();
+  }
+
+  /*
+   *  Initialize the garbage collection list to start with nothing on it.
+   */
+  malloc_deferred_frees_initialize();
+
+  /*
+   *  Initialize the optional sbrk support for extending the heap
+   */
+  if ( rtems_malloc_sbrk_helpers != NULL ) {
+    heap_begin = (*rtems_malloc_sbrk_helpers->initialize)(
+      heap_begin,
+      sbrk_amount
+    );
+    heap_size  = (uintptr_t) sbrk_amount;
+  }
+
+  /*
+   *  If this system is configured to use the same heap for
+   *  the RTEMS Workspace and C Program Heap, then we need to
+   *  be very very careful about destroying the initialization
+   *  that has already been done.
+   */
+
+  /*
+   *  If the BSP is not clearing out the workspace, then it is most likely
+   *  not clearing out the initial memory for the heap.  There is no
+   *  standard supporting zeroing out the heap memory.  But much code
+   *  with UNIX history seems to assume that memory malloc'ed during
+   *  initialization (before any free's) is zero'ed.  This is true most
+   *  of the time under UNIX because zero'ing memory when it is first
+   *  given to a process eliminates the chance of a process seeing data
+   *  left over from another process.  This would be a security violation.
+   */
+
+  if (
+    !rtems_unified_work_area
+      && rtems_configuration_get_do_zero_of_workspace()
+  ) {
+     memset( heap_begin, 0, heap_size );
+  }
+
+  /*
+   *  Unfortunately we cannot use assert if this fails because if this
+   *  has failed we do not have a heap and if we do not have a heap
+   *  STDIO cannot work because there will be no buffers.
+   */
+
+  if ( !rtems_unified_work_area ) {
+    uintptr_t status = _Protected_heap_Initialize(
+      RTEMS_Malloc_Heap,
+      heap_begin,
+      heap_size,
+      CPU_HEAP_ALIGNMENT
+    );
+    if ( status == 0 ) {
+      rtems_fatal_error_occurred( RTEMS_NO_MEMORY );
+    }
+  }
+
+  MSBUMP( space_available, _Protected_heap_Get_size(RTEMS_Malloc_Heap) );
+}
+#endif