Add support for ARC to libgloss

ChangeLog:
2015-11-12  Anton Kolesov  <Anton.Kolesov@synopsys.com>

	* configure.in: Add ARC support to libgloss.
	* configure: Regenerate.

libgloss/ChangeLog:
2015-11-12  Anton Kolesov  <Anton.Kolesov@synopsys.com>

	* configure: Add ARC support.
	* configure.in: Likewise.
	* arc/Makefile.in: Likewise.
	* arc/aclocal.m4: Likewise.
	* arc/configure: Likewise.
	* arc/configure.in: Likewise.
	* arc/crt0.S: Likewise.
	* arc/libcfunc.c: Likewise.
	* arc/nsim-syscall.h: Likewise.
	* arc/nsim-syscalls.c: Likewise.
	* arc/nsim.specs: Likewise.
	* arc/sbrk.c: Likewise.

1 files changed, 61 insertions, 0 deletions

diff --git a/libgloss/arc/sbrk.c b/libgloss/arc/sbrk.c
new file mode 100644
index 000000000..8cb8461dd
--- /dev/null
+++ b/libgloss/arc/sbrk.c
@@ -0,0 +1,61 @@
+/*
+   Copyright (c) 2015, Synopsys, Inc. All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are met:
+
+   1) Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+   2) 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.
+
+   3) Neither the name of the Synopsys, Inc., 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 HOLDER 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 <sys/types.h>
+#include <sys/errno.h>
+
+extern char __start_heap;
+extern char __end_heap;
+
+caddr_t
+_sbrk (size_t nbytes)
+{
+  static char* heap_ptr = NULL;
+  char* prev_heap_ptr;
+
+  if (heap_ptr == NULL)
+    {
+      heap_ptr = &__start_heap;
+    }
+
+  /* Align the 'heap_ptr' so that memory will always be allocated at word
+     boundaries. */
+  heap_ptr = (char *) ((((unsigned long) heap_ptr) + 7) & ~7);
+  prev_heap_ptr = heap_ptr;
+
+  if ((heap_ptr + nbytes) < &__end_heap)
+    {
+      heap_ptr += nbytes;
+      return (caddr_t) prev_heap_ptr;
+    }
+
+  errno = ENOMEM;
+  return (caddr_t) -1;
+}