ports/sysdeps/unix/sysv/linux/am33/brk.c

   1 /* brk system call for Linux/am33.
   2    Copyright (C) 1995-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Alexandre Oliva <aoliva@redhat.com>.
   5    Based on ../i386/brk.c.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Library General Public License as
   9    published by the Free Software Foundation; either version 2 of the
  10    License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with the GNU C Library.  If not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include <errno.h>
  22 #include <unistd.h>
  23 #include <sysdep.h>
  24
  25 /* This must be initialized data because commons can't have aliases.  */
  26 void *__curbrk = 0;
  27
  28 int
  29 __brk (void *addr)
  30 {
  31   void *newbrk;
  32
  33   newbrk = INLINE_SYSCALL (brk, 1, addr);
  34
  35   __curbrk = newbrk;
  36
  37   if (newbrk < addr)
  38     {
  39       __set_errno (ENOMEM);
  40       return -1;
  41     }
  42
  43   return 0;
  44 }
  45 weak_alias (__brk, brk)