diff options
Diffstat (limited to 'lib/libc/arch/m88k/sys/sbrk.S')
| -rw-r--r-- | lib/libc/arch/m88k/sys/sbrk.S | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/libc/arch/m88k/sys/sbrk.S b/lib/libc/arch/m88k/sys/sbrk.S new file mode 100644 index 00000000000..1c31ed627eb --- /dev/null +++ b/lib/libc/arch/m88k/sys/sbrk.S @@ -0,0 +1,74 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * the Systems Programming Group of the University of Utah Computer + * Science Department. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) + .data + /*.asciz "from: @(#)sbrk.s 5.1 (Berkeley) 5/12/90"*/ + .asciz "$Id: sbrk.S,v 1.1 1998/12/15 07:10:33 smurph Exp $" + .text +#endif /* LIBC_SCCS and not lint */ + +#include "SYS.h" + + .globl _end + .globl curbrk + + .data +/* +curbrk: .long 0 +*/ + .align 2 +curbrk: .long _end + .text + +ENTRY(sbrk) + or.u r5,r0,hi16(curbrk) + ld r5,r5,lo16(curbrk) + add r2,r2,r5 + or r4,r2,0 + or r13,r0,SYS_break + tb0 0,r0,128 + br cerror + /* Save old curbrk */ + or.u r5,r0,hi16(curbrk) + ld r3,r5,lo16(curbrk) + /* Update curbrk */ + st r4,r5,lo16(curbrk) + /* and return old curbrk */ + or r2,r3,0 + jmp.n r1 + or r3,r0,0 |