diff options
Diffstat (limited to 'misc/sbrk.c')
| -rw-r--r-- | misc/sbrk.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/misc/sbrk.c b/misc/sbrk.c index 0df60076cc..985b34749a 100644 --- a/misc/sbrk.c +++ b/misc/sbrk.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991,1995,1996,1997,2000,2002 Free Software Foundation, Inc. +/* Copyright (C) 1991,1995-1997,2000,2002,2009 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 @@ -16,8 +16,9 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#include <unistd.h> #include <errno.h> +#include <stdint.h> +#include <unistd.h> /* Defined in brk.c. */ extern void *__curbrk; @@ -47,7 +48,10 @@ __sbrk (intptr_t increment) return __curbrk; oldbrk = __curbrk; - if (__brk (oldbrk + increment) < 0) + if ((increment > 0 + ? ((uintptr_t) oldbrk + (uintptr_t) increment < (uintptr_t) oldbrk) + : ((uintptr_t) oldbrk < (uintptr_t) -increment)) + || __brk (oldbrk + increment) < 0) return (void *) -1; return oldbrk; |