1 files changed, 67 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nds32/brk.c b/libc/sysdeps/linux/nds32/brk.c
new file mode 100644
index 000000000..a3c38d9b8
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/brk.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* brk system call for Linux/NDS32.
+   Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+/* This must be initialized data because commons can't have aliases.  */
+void *__curbrk attribute_hidden = 0;
+
+libc_hidden_proto(brk)
+int
+brk (void *addr)
+{
+  void *newbrk;
+
+#ifdef NDS32_ABI_V0
+  __asm__ __volatile__ ("move       $r0, %1      \n\t"   // save the argment in r0
+                        "pushm	    $r7, $r8     \n\t"
+			"sethi 	    $r7, hi20(%2)\n\t"   // put the syscall number in r7
+			"ori   	    $r7, $r7, lo12(%2)\n\t"
+			"syscall    0x7fff       \n\t"   // do the system call
+			"popm	    $r7, $r8     \n\t"
+                        "move       %0, $r5      \n\t"   // keep the return value
+                        : "=r"(newbrk)
+                        : "r"(addr), "i"(SYS_ify(brk))
+                        : "$r0", "$r5");
+#else
+  __asm__ __volatile__ ("move       $r0, %1      \n\t"   // save the argment in r0
+			"syscall    %2       \n\t"   	 // do the system call
+                        "move       %0, $r0      \n\t"   // keep the return value
+                        : "=r"(newbrk)
+                        : "r"(addr), "i"(SYS_ify(brk))
+                        : "$r0");
+#endif
+
+  __curbrk = newbrk;
+
+  if (newbrk < addr)
+    {
+      __set_errno (ENOMEM);
+      return -1;
+    }
+
+  return 0;
+}
+libc_hidden_def(brk)