From 55497563115712ac1ec2c70713357a7489291037 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Mon, 21 Jan 2002 02:39:29 +0000 Subject: Make sbrk common, add arm/brk.c, cleanup leftover damage --- libc/sysdeps/linux/common/sbrk.c | 47 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 libc/sysdeps/linux/common/sbrk.c (limited to 'libc/sysdeps/linux/common/sbrk.c') diff --git a/libc/sysdeps/linux/common/sbrk.c b/libc/sysdeps/linux/common/sbrk.c new file mode 100644 index 000000000..028370e99 --- /dev/null +++ b/libc/sysdeps/linux/common/sbrk.c @@ -0,0 +1,47 @@ +/* Copyright (C) 1991, 1995, 1996, 1997, 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 +#include + +/* Defined in brk.c. */ +extern void *__curbrk; +extern int brk (void *addr); + + +/* 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 (__curbrk == NULL) + if (brk (0) < 0) /* Initialize the break. */ + return (void *) -1; + + if (increment == 0) + return __curbrk; + + oldbrk = __curbrk; + if (brk (oldbrk + increment) < 0) + return (void *) -1; + + return oldbrk; +} + -- cgit v1.2.3