4.3BSD - /usr/src/lib/libc/vax/sys/sbrk.c

   1: /*
   2:  * Copyright (c) 1983 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 SYSLIBC_SCCS
   8: _sccsid:.asciz  "@(#)sbrk.c	5.3 (Berkeley) 3/9/86"
   9: #endif SYSLIBC_SCCS
  10: 
  11: #include "SYS.h"
  12: 
  13: #define SYS_brk     17
  14: 
  15:     .globl  _end
  16:     .globl  minbrk
  17:     .globl  curbrk
  18: 
  19:     .data
  20: minbrk: .long   _end
  21: curbrk: .long   _end
  22:     .text
  23: 
  24: ENTRY(sbrk)
  25:     addl3   curbrk,4(ap),-(sp)
  26:     pushl   $1
  27:     movl    ap,r3
  28:     movl    sp,ap
  29:     chmk    $SYS_brk
  30:     jcs     err
  31:     movl    curbrk,r0
  32:     addl2   4(r3),curbrk
  33:     ret
  34: err:
  35:     jmp cerror

Defined functions

Defined variables

Defined macros