diff options
author | Ruslan Bukin <br@FreeBSD.org> | 2016-03-10 15:51:43 +0000 |
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committer | Ruslan Bukin <br@FreeBSD.org> | 2016-03-10 15:51:43 +0000 |
commit | d52d6d7ca734cbac90837a7e29462510483b3af2 (patch) | |
tree | 3c9d8bd48a269d5787a59f9697805cb4263d8559 /sys/riscv/riscv/unwind.c | |
parent | eef192d85ccc80a3a09d36e98f39c17fac6eb376 (diff) | |
download | src-d52d6d7ca734cbac90837a7e29462510483b3af2.tar.gz src-d52d6d7ca734cbac90837a7e29462510483b3af2.zip |
Add support for ddb(4).
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Notes
Notes:
svn path=/head/; revision=296614
Diffstat (limited to 'sys/riscv/riscv/unwind.c')
-rw-r--r-- | sys/riscv/riscv/unwind.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sys/riscv/riscv/unwind.c b/sys/riscv/riscv/unwind.c new file mode 100644 index 000000000000..18fc1e250c9b --- /dev/null +++ b/sys/riscv/riscv/unwind.c @@ -0,0 +1,57 @@ +/*- + * Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com> + * All rights reserved. + * + * Portions of this software were developed by SRI International and the + * University of Cambridge Computer Laboratory under DARPA/AFRL contract + * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. + * + * Portions of this software were developed by the University of Cambridge + * Computer Laboratory as part of the CTSRD Project, with support from the + * UK Higher Education Innovation Fund (HEIF). + * + * 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/param.h> + +#include <machine/stack.h> +#include <machine/vmparam.h> + +int +unwind_frame(struct unwind_state *frame) +{ + uint64_t fp; + + fp = frame->fp; + + if (!INKERNEL(fp)) + return (-1); + + frame->sp = fp; + frame->fp = *(uint64_t *)(fp - 16); + frame->pc = *(uint64_t *)(fp - 8) - 4; + + return (0); +} |