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Annotation of 43BSD/lib/libc/vax/gen/alloca.s, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 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 LIBC_SCCS
        !             8:        .asciz  "@(#)alloca.s   5.3 (Berkeley) 3/9/86"
        !             9: #endif LIBC_SCCS
        !            10: 
        !            11: /* like alloc, but automatic free in return */
        !            12: 
        !            13: #include "DEFS.h"
        !            14: 
        !            15: ENTRY(alloca, 0)
        !            16:        subl2   4(ap),sp        /* crude allocation */
        !            17:        movl    16(fp),r1       /* pc */
        !            18:        movq    8(fp),ap        /* new (old) ap and fp */
        !            19:        bicl2   $3,sp           /* 4-byte align */
        !            20:        addl2   $7*4,sp         /* reuse space of mscp */
        !            21:        movl    sp,r0           /* return value */
        !            22:        jmp     (r1)            /* funny return */

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