sysdeps/unix/mips/brk.S

   1 /* Copyright (C) 1992, 1995, 1997, 2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Brendan Kehoe (brendan@zen.org).
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <sysdep.h>
  21 #include <sys/asm.h>
  22
  23 #ifndef SYS_brk
  24 #define SYS_brk 17
  25 #endif
  26
  27 #ifndef       HAVE_GNU_LD
  28 #define _end           end
  29 #endif
  30
  31         .data
  32 ENTRY(__curbrk)
  33         .word 0
  34         .end __curbrk
  35
  36         .text
  37 SYSCALL__(brk, 1)
  38         .set    reorder
  39         /* Handle the query case.  */
  40         bnez a0, 1f
  41         move a0, v0
  42 1:      /* Update __curbrk and exit cleanly.  */
  43         PTR_S a0, __curbrk
  44         move v0, zero
  45         jr ra
  46 PSEUDO_END(__brk)
  47
  48 weak_alias (__brk, brk)