diff options
Diffstat (limited to 'lib/libc/i386/sys/_amd64_get_fsbase.c')
-rw-r--r-- | lib/libc/i386/sys/_amd64_get_fsbase.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/lib/libc/i386/sys/_amd64_get_fsbase.c b/lib/libc/i386/sys/_amd64_get_fsbase.c new file mode 100644 index 0000000..f9a9d94 --- /dev/null +++ b/lib/libc/i386/sys/_amd64_get_fsbase.c @@ -0,0 +1,44 @@ +/*- + * Copyright (c) 2003 Peter Wemm + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <machine/sysarch.h> + +int +_amd64_get_fsbase(void **addr) +{ + uint64_t addr64; + int ret; + + addr64 = 0; + ret = sysarch(_AMD64_GET_FSBASE, (void **)(&addr64)); + if (ret != -1) + *addr = (void *)(uintptr_t)addr64; + return ret; +} |