Return to alloca.s CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / lib / libc / gen / gen.tahoe

Annotation of 43BSDTahoe/lib/libc/gen/gen.tahoe/alloca.s, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  *
                     17:  * This code is derived from software contributed to Berkeley by
                     18:  * Computer Consoles Inc.
                     19:  */
                     20: 
                     21: #if defined(LIBC_SCCS) && !defined(lint)
                     22:        .asciz "@(#)alloca.s    1.3 (Berkeley) 6/27/88"
                     23: #endif /* LIBC_SCCS and not lint */
                     24: 
                     25: /* like alloc, but automatic automatic free in return */
                     26: 
                     27: #include "DEFS.h"
                     28: 
                     29: ENTRY(alloca, 0)
                     30:        moval   (sp),r0         # current sp
                     31:        subl2   4(fp),r0        # allocation size
                     32:        andl2   $0xfffffffc,r0  # allignment
                     33:        movl    -8(fp),r1       # old pc
                     34:        movl    (fp),fp         # old fp
                     35:        addl2   $4*4,r0         # reuse space of mscp
                     36:        movl    r0,sp           # new sp
                     37:        jmp     (r1)            # funny return

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.