/*

   Copyright (C) 2000-2018 Free Software Foundation, Inc.

   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <unistd.h>

#include <sysdep.h>

void *__curbrk = 0;

/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt

   to work around different old braindamage in the old Linux/x86 ELF

   dynamic linker.  Sigh.  */

weak_alias (__curbrk, ___brk_addr)

int

__brk (void *addr)

{

  void *newbrk;

  {

    register void *__addr __asm__("2") = addr;

    __asm__ ("svc  %b1\n\t"		/* call sys_brk */

	     : "=d" (__addr)

	     : "I" (SYS_ify(brk)), "r" (__addr)

	     : "cc", "memory" );

    newbrk = __addr;

  }

  __curbrk = newbrk;

  if (newbrk < addr)

    {

      __set_errno (ENOMEM);

      return -1;

    }

  return 0;

}

weak_alias (__brk, brk)