1 files changed, 57 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/brk.c b/sysdeps/unix/sysv/linux/s390/brk.c
new file mode 100644
index 0000000000..fe22f382ef
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/s390/brk.c
@@ -0,0 +1,57 @@
+/*
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
+   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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  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 <sysdep.h>
+
+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/x86 ELF
+   dynamic linker.  Sigh.  */
+weak_alias (__curbrk, ___brk_addr)
+
+int
+__brk (void *addr)
+{
+  void *newbrk;
+
+  {
+    register long r0 asm ("2");
+    register void *__addr asm("2") = addr;
+
+    asm ("svc  %b1\n\t"		/* call sys_brk */
+	 : "=d" (r0)
+	 : "I" (SYS_ify(brk)), "r" (__addr)
+	 : _svc_clobber );
+    newbrk = (void *) r0;
+  }
+  __curbrk = newbrk;
+
+  if (newbrk < addr)
+    {
+      __set_errno (ENOMEM);
+      return -1;
+    }
+
+  return 0;
+}
+weak_alias (__brk, brk)