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Annotation of 43BSD/lib/libc/vax/sys/sbrk.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #ifdef SYSLIBC_SCCS
        !             8: _sccsid:.asciz "@(#)sbrk.c     5.3 (Berkeley) 3/9/86"
        !             9: #endif SYSLIBC_SCCS
        !            10: 
        !            11: #include "SYS.h"
        !            12: 
        !            13: #define        SYS_brk         17
        !            14: 
        !            15:        .globl  _end
        !            16:        .globl  minbrk
        !            17:        .globl  curbrk
        !            18: 
        !            19:        .data
        !            20: minbrk: .long  _end
        !            21: curbrk:        .long   _end
        !            22:        .text
        !            23: 
        !            24: ENTRY(sbrk)
        !            25:        addl3   curbrk,4(ap),-(sp)
        !            26:        pushl   $1
        !            27:        movl    ap,r3
        !            28:        movl    sp,ap
        !            29:        chmk    $SYS_brk
        !            30:        jcs     err
        !            31:        movl    curbrk,r0
        !            32:        addl2   4(r3),curbrk
        !            33:        ret
        !            34: err:
        !            35:        jmp     cerror

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