From 0934f142036f12292711770d353f1c01ab718db7 Mon Sep 17 00:00:00 2001 From: "\"Jan-Benedict Glaw\"" Date: Fri, 27 Jan 2006 21:20:28 +0000 Subject: First round of VAX patches. This isn't complete right now, there are for sure still bugs (properly hidden, of course), a libm is completely missing (I've got one that implements some basic stuff, but that's really not ready for checking in...) I've also got a list of other things that need touch-ups, but that's mostly minor stuff that'll be done during the next days. --- libc/sysdeps/linux/vax/brk.c | 54 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 libc/sysdeps/linux/vax/brk.c (limited to 'libc/sysdeps/linux/vax/brk.c') diff --git a/libc/sysdeps/linux/vax/brk.c b/libc/sysdeps/linux/vax/brk.c new file mode 100644 index 000000000..bd49e19fe --- /dev/null +++ b/libc/sysdeps/linux/vax/brk.c @@ -0,0 +1,54 @@ +/* brk system call for Linux/VAX. + Copyright (C) 2000, 2005 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include + +/* This must be initialized data because commons can't have aliases. */ +void *__curbrk = NULL; + +libc_hidden_proto(brk) +int +brk (void *addr) +{ + register unsigned long int result __asm__ ("%%r0"); + + asm ( + " pushl %%ap \n" /* Start frame */ + " pushl %2 \n" /* New top address we wish to get */ + " pushl $1 \n" /* One argument */ + " movl %%sp, %%ap \n" /* Finish frame */ + " chmk %1 \n" /* Perform the system call */ + " addl2 $8, %%sp \n" /* Remove pushed arg */ + " movl (%%sp)+, %%ap \n" /* Get back %AP */ + : "=r" (result) + : "0" (__NR_brk), + "g" (addr)); + + if ((void *) result < addr) { + __set_errno (ENOMEM); + return -1; + } else + __curbrk = (void *) result; + + return 0; +} +libc_hidden_def(brk) + -- cgit v1.2.3