usr/src/lib/libc/tahoe/sys/brk.s

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifdef SYSLIBC_SCCS
_sccsid:.asciz  "@(#)brk.s      5.1 (Berkeley) %G%"
#endif SYSLIBC_SCCS

#include "SYS.h"

#define SYS_brk         17

        .globl  curbrk
        .globl  minbrk

ENTRY(brk)
        cmpl    4(fp),minbrk
        bgeq    ok
        movl    minbrk,4(fp)
ok:
        kcall   $SYS_brk
        jcs     err
        movl    4(fp),curbrk
        clrl    r0
        ret
err:
        jmp     cerror