diff options
Diffstat (limited to 'lib/libc/powerpc64/sys/sbrk.S')
-rw-r--r-- | lib/libc/powerpc64/sys/sbrk.S | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/libc/powerpc64/sys/sbrk.S b/lib/libc/powerpc64/sys/sbrk.S new file mode 100644 index 0000000..e147493 --- /dev/null +++ b/lib/libc/powerpc64/sys/sbrk.S @@ -0,0 +1,68 @@ +/*- + * Copyright (c) 2002 Peter Grehan. + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ +/* $NetBSD: sbrk.S,v 1.8 2000/06/26 06:25:44 kleink Exp $ */ + +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + +#include "SYS.h" + + .globl HIDENAME(curbrk) + .globl CNAME(_end) + + .data + .align 3 +HIDENAME(curbrk): + .llong CNAME(_end) + + .text +ENTRY(sbrk) + addis %r5,%r2,HIDENAME(curbrk)@toc@ha + addi %r5,%r5,HIDENAME(curbrk)@toc@l + ld %r6,0(%r5) /* r6 = old break */ + cmpdi %r3,0 /* sbrk(0) - return curbrk */ + beq 1f + add %r3,%r3,%r6 + mr %r7,%r3 /* r7 = new break */ + li %r0,SYS_break + sc /* break(new_break) */ + bso 2f + std %r7,0(%r5) +1: + mr %r3,%r6 /* set return value */ + blr +2: + mflr %r0 + std %r0,16(%r1) + stdu %r1,-48(%r1) + bl HIDENAME(cerror) + nop + ld %r1,0(%r1) + ld %r0,16(%r1) + mtlr %r0 + blr + + .section .note.GNU-stack,"",%progbits |