1 /* brk system call for Linux/VAX.
2 Copyright (C) 2000, 2005 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 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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 #include <sys/syscall.h>
24 /* This must be initialized data because commons can't have aliases. */
25 void *__curbrk attribute_hidden = NULL;
30 register unsigned long int result __asm__ ("%%r0");
33 " pushl %%ap \n" /* Start frame */
34 " pushl %2 \n" /* New top address we wish to get */
35 " pushl $1 \n" /* One argument */
36 " movl %%sp, %%ap \n" /* Finish frame */
37 " chmk %1 \n" /* Perform the system call */
38 " addl2 $8, %%sp \n" /* Remove pushed arg */
39 " movl (%%sp)+, %%ap \n" /* Get back %AP */
44 if ((void *) result < addr) {
48 __curbrk = (void *) result;