1 files changed, 56 insertions, 0 deletions
diff --git a/libgloss/visium/sbrk.c b/libgloss/visium/sbrk.c
new file mode 100644
index 000000000..61b1b8d64
--- /dev/null
+++ b/libgloss/visium/sbrk.c
@@ -0,0 +1,56 @@
+/* sbrk.c for the Visium processor.
+
+   Copyright (c) 2015 Rolls-Royce Controls and Data Services Limited.
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are met:
+
+     * Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+     * Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+     * Neither the name of Rolls-Royce Controls and Data Services Limited nor
+       the names of its contributors may be used to endorse or promote products
+       derived from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+   THE POSSIBILITY OF SUCH DAMAGE.  */
+
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+/* These labels are set in the linker script, to mark the start and end of the
+   memory reserved for the heap.  */
+extern unsigned char _sheap [];
+extern unsigned char _eheap [];
+
+void *
+sbrk (ptrdiff_t nbytes)
+{
+  static unsigned char *heap_ptr = _sheap;
+
+  if (0 <= nbytes && heap_ptr + nbytes < _eheap)
+    {
+      void *base = (void *)heap_ptr;
+
+      heap_ptr += nbytes;
+      memset (base, 0, nbytes);
+
+      return base;
+    }
+
+  errno = ENOMEM;
+  return (void *)-1;
+}