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Annotation of 43BSD/lib/libc/vax/gen/alloca.s, revision 1.1.1.1

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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