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Diffstat (limited to 'sysdeps/unix/sysv/linux/generic/brk.c')
-rw-r--r--sysdeps/unix/sysv/linux/generic/brk.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/generic/brk.c b/sysdeps/unix/sysv/linux/generic/brk.c
new file mode 100644
index 0000000000..214d8fd2fe
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/generic/brk.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+ 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 <unistd.h>
+#include <sysdep.h>
+
+/* This must be initialized data because commons can't have aliases. */
+void *__curbrk = 0;
+
+/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt
+ to work around different old braindamage in the old Linux ELF dynamic
+ linker. */
+weak_alias (__curbrk, ___brk_addr)
+
+int
+__brk (void *addr)
+{
+ INTERNAL_SYSCALL_DECL (err);
+
+ __curbrk = (void *) INTERNAL_SYSCALL (brk, err, 1, addr);
+ if (__curbrk < addr)
+ {
+ __set_errno (ENOMEM);
+ return -1;
+ }
+
+ return 0;
+}
+weak_alias (__brk, brk)