Sat Feb 10 13:09:03 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
[glibc/history.git] / sysdeps / unix / sysv / linux / m68k / brk.c
blob3fd547545eb055b9a39410d6c9f55ab774424e76
1 /* brk system call for Linux/m68k.
2 Copyright (C) 1996 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
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 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
18 Cambridge, MA 02139, USA. */
20 #include <errno.h>
21 #include <unistd.h>
22 #include <sysdep.h>
24 void *__curbrk;
26 int
27 __brk (void *addr)
29 void *newbrk;
32 register long d0 __asm__ ("%d0");
34 asm ("move%.l %2, %%d1\n"
35 "trap #0" /* Perform the system call. */
36 : "=d" (d0)
37 : "0" (SYS_ify (brk)), "g" (addr)
38 : "%d0", "%d1");
39 newbrk = (void *) d0;
41 __curbrk = newbrk;
43 if (newbrk < addr)
45 errno = ENOMEM;
46 return -1;
49 return 0;
51 weak_alias (__brk, brk)