[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/misc/sbrk.c b/ap/libc/glibc/glibc-2.22/misc/sbrk.c
new file mode 100644
index 0000000..89ab9c4
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/misc/sbrk.c
@@ -0,0 +1,64 @@
+/* Copyright (C) 1991-2015 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <stdint.h>
+#include <unistd.h>
+
+/* Defined in brk.c. */
+extern void *__curbrk;
+extern int __brk (void *addr);
+
+/* Defined in init-first.c. */
+extern int __libc_multiple_libcs attribute_hidden;
+
+/* Extend the process's data space by INCREMENT.
+ If INCREMENT is negative, shrink data space by - INCREMENT.
+ Return start of new space allocated, or -1 for errors. */
+void *
+__sbrk (intptr_t increment)
+{
+ void *oldbrk;
+
+ /* If this is not part of the dynamic library or the library is used
+ via dynamic loading in a statically linked program update
+ __curbrk from the kernel's brk value. That way two separate
+ instances of __brk and __sbrk can share the heap, returning
+ interleaved pieces of it. */
+ if (__curbrk == NULL || __libc_multiple_libcs)
+ if (__brk (0) < 0) /* Initialize the break. */
+ return (void *) -1;
+
+ if (increment == 0)
+ return __curbrk;
+
+ oldbrk = __curbrk;
+ if (increment > 0
+ ? ((uintptr_t) oldbrk + (uintptr_t) increment < (uintptr_t) oldbrk)
+ : ((uintptr_t) oldbrk < (uintptr_t) -increment))
+ {
+ __set_errno (ENOMEM);
+ return (void *) -1;
+ }
+
+ if (__brk (oldbrk + increment) < 0)
+ return (void *) -1;
+
+ return oldbrk;
+}
+libc_hidden_def (__sbrk)
+weak_alias (__sbrk, sbrk)