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Annotation of 43BSDTahoe/lib/libc/vax/sys/sbrk.s, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 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: 
                     18: #if defined(SYSLIBC_SCCS) && !defined(lint)
                     19:        .asciz "@(#)sbrk.s      5.5 (Berkeley) 6/27/88"
                     20: #endif /* SYSLIBC_SCCS and not lint */
                     21: 
                     22: #include "SYS.h"
                     23: 
                     24: #define        SYS_brk         17
                     25: 
                     26:        .globl  _end
                     27:        .globl  minbrk
                     28:        .globl  curbrk
                     29: 
                     30:        .data
                     31: minbrk: .long  _end
                     32: curbrk:        .long   _end
                     33:        .text
                     34: 
                     35: ENTRY(sbrk)
                     36:        addl3   curbrk,4(ap),-(sp)
                     37:        pushl   $1
                     38:        movl    ap,r3
                     39:        movl    sp,ap
                     40:        chmk    $SYS_brk
                     41:        jcs     err
                     42:        movl    curbrk,r0
                     43:        addl2   4(r3),curbrk
                     44:        ret
                     45: err:
                     46:        jmp     cerror

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