[thirdparty/glibc.git] / ports / sysdeps / unix / sysv / linux / arm / brk.c

/* brk system call for Linux/ARM.
   Copyright (C) 1995-2014 Free Software Foundation, Inc.
   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>

/* This must be initialized data because commons can't have aliases.  */
void *__curbrk = 0;

int
__brk (void *addr)
{
  void *newbrk;

  __curbrk = newbrk = (void *) INLINE_SYSCALL (brk, 1, addr);

  if (newbrk < addr)
    {
      __set_errno (ENOMEM);
      return -1;
    }

  return 0;
}
weak_alias (__brk, brk)
Commit	Line	Data
f69a3b40	1	/* brk system call for Linux/ARM.
d4697bc9	2	Copyright (C) 1995-2014 Free Software Foundation, Inc.
f69a3b40 UD	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
3214b89b AJ	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.
f69a3b40 UD	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
3214b89b	13	Lesser General Public License for more details.
f69a3b40	14
3214b89b	15	You should have received a copy of the GNU Lesser General Public
ab84e3ff PE	16	License along with the GNU C Library. If not, see
ab84e3ff PE	17	<http://www.gnu.org/licenses/>. */
f69a3b40 UD	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
de96d148	31	__curbrk = newbrk = (void *) INLINE_SYSCALL (brk, 1, addr);
f69a3b40 UD	32
	33	if (newbrk < addr)
	34	{
	35	__set_errno (ENOMEM);
	36	return -1;
	37	}
	38
	39	return 0;
	40	}
	41	weak_alias (__brk, brk)