diff options
Diffstat (limited to 'lib/libc/alpha/sys/brk.S')
-rw-r--r-- | lib/libc/alpha/sys/brk.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/lib/libc/alpha/sys/brk.S b/lib/libc/alpha/sys/brk.S new file mode 100644 index 0000000..7dc3a40 --- /dev/null +++ b/lib/libc/alpha/sys/brk.S @@ -0,0 +1,50 @@ +/* $NetBSD: brk.S,v 1.4 1996/10/17 03:08:15 cgd Exp $ */ + +/* + * Copyright (c) 1994, 1995 Carnegie-Mellon University. + * All rights reserved. + * + * Author: Chris G. Demetriou + * + * Permission to use, copy, modify and distribute this software and + * its documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ + +#include "SYS.h" + + .globl _end +IMPORT(curbrk, 8) + + .data +EXPORT(minbrk) + .quad _end + + .text +LEAF(brk, 1) + br pv, L1 /* XXX profiling */ +L1: LDGP(pv) + ldq v0, minbrk + cmpult a0, v0, t0 + cmovne t0, v0, a0 + CALLSYS_ERROR(break) + stq a0, curbrk + mov zero, v0 + RET +END(brk) |