zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/build/uClibc/libc/sysdeps/linux/nios2/brk.c b/ap/build/uClibc/libc/sysdeps/linux/nios2/brk.c
new file mode 100644
index 0000000..24bd719
--- /dev/null
+++ b/ap/build/uClibc/libc/sysdeps/linux/nios2/brk.c
@@ -0,0 +1,45 @@
+/* brk system call for Linux/Nios2.
+ Copyright (C) 1995, 1996, 2000 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <errno.h>
+
+/* This must be initialized data because commons can't have aliases. */
+void *__curbrk attribute_hidden = 0;
+
+int brk (void *addr)
+{
+ void *newbrk;
+ register int r2 __asm__("r2") = TRAP_ID_SYSCALL;
+ register int r3 __asm__("r3") = __NR_brk;
+ register void *r4 __asm__("r4") = addr;
+
+ __asm__ __volatile__ ("trap\n\t" : "=r"(newbrk) : "0"(r2), "r"(r3), "r"(r4));
+
+ __curbrk = newbrk;
+
+ if (newbrk < addr) {
+ __set_errno (ENOMEM);
+ return -1;
+ }
+
+ return 0;
+}
+libc_hidden_def(brk)