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Annotation of 43BSDReno/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: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #if defined(SYSLIBC_SCCS) && !defined(lint)
                     21:        .asciz "@(#)sbrk.s      5.6 (Berkeley) 6/1/90"
                     22: #endif /* SYSLIBC_SCCS and not lint */
                     23: 
                     24: #include "SYS.h"
                     25: 
                     26: #define        SYS_brk         17
                     27: 
                     28:        .globl  _end
                     29:        .globl  minbrk
                     30:        .globl  curbrk
                     31: 
                     32:        .data
                     33: minbrk: .long  _end
                     34: curbrk:        .long   _end
                     35:        .text
                     36: 
                     37: ENTRY(sbrk)
                     38:        addl3   curbrk,4(ap),-(sp)
                     39:        pushl   $1
                     40:        movl    ap,r3
                     41:        movl    sp,ap
                     42:        chmk    $SYS_brk
                     43:        jcs     err
                     44:        movl    curbrk,r0
                     45:        addl2   4(r3),curbrk
                     46:        ret
                     47: err:
                     48:        jmp     cerror

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