sysdeps/unix/sysv/linux/hppa/brk.c

   1 /* brk system call for Linux/HPPA.
   2    Copyright (C) 1995-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <sysdep.h>
  22
  23 /* This must be initialized data because commons can't have aliases.  */
  24 void *__curbrk = 0;
  25
  26 int
  27 __brk (void *addr)
  28 {
  29   void *newbrk;
  30
  31   __curbrk = newbrk = (void *) INLINE_SYSCALL (brk, 1, addr);
  32
  33   if (newbrk < addr)
  34     {
  35       __set_errno (ENOMEM);
  36       return -1;
  37     }
  38
  39   return 0;
  40 }
  41 weak_alias (__brk, brk)