1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004 David Xu <davidxu@freebsd.org>
5 * Copyright (c) 2004 Marcel Moolenaar
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/procfs.h>
34#include <string.h>
35#include <thread_db.h>
36#include <ucontext.h>
37
38#include "libpthread_db.h"
39
40void
41pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
42{
43	mcontext_t *mc = &uc->uc_mcontext;
44
45	mc->mc_rdi = r->r_rdi;
46	mc->mc_rsi = r->r_rsi;
47	mc->mc_rdx = r->r_rdx;
48	mc->mc_rcx = r->r_rcx;
49	mc->mc_r8 = r->r_r8;
50	mc->mc_r9 = r->r_r9;
51	mc->mc_rax = r->r_rax;
52	mc->mc_rbx = r->r_rbx;
53	mc->mc_rbp = r->r_rbp;
54	mc->mc_r10 = r->r_r10;
55	mc->mc_r11 = r->r_r11;
56	mc->mc_r12 = r->r_r12;
57	mc->mc_r13 = r->r_r13;
58	mc->mc_r14 = r->r_r14;
59	mc->mc_r15 = r->r_r15;
60	mc->mc_rip = r->r_rip;
61	mc->mc_cs = r->r_cs;
62	mc->mc_rflags = r->r_rflags;
63	mc->mc_rsp = r->r_rsp;
64	mc->mc_ss = r->r_ss;
65}
66
67void
68pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
69{
70	const mcontext_t *mc = &uc->uc_mcontext;
71
72	r->r_rdi = mc->mc_rdi;
73	r->r_rsi = mc->mc_rsi;
74	r->r_rdx = mc->mc_rdx;
75	r->r_rcx = mc->mc_rcx;
76	r->r_r8 = mc->mc_r8;
77	r->r_r9 = mc->mc_r9;
78	r->r_rax = mc->mc_rax;
79	r->r_rbx = mc->mc_rbx;
80	r->r_rbp = mc->mc_rbp;
81	r->r_r10 = mc->mc_r10;
82	r->r_r11 = mc->mc_r11;
83	r->r_r12 = mc->mc_r12;
84	r->r_r13 = mc->mc_r13;
85	r->r_r14 = mc->mc_r14;
86	r->r_r15 = mc->mc_r15;
87	r->r_rip = mc->mc_rip;
88	r->r_cs = mc->mc_cs;
89	r->r_rflags = mc->mc_rflags;
90	r->r_rsp = mc->mc_rsp;
91	r->r_ss = mc->mc_ss;
92}
93
94void
95pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
96{
97
98	memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(*r));
99}
100
101void
102pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
103{
104
105	memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(*r));
106}
107
108void
109pt_md_init(void)
110{
111
112	/* Nothing to do */
113}
114
115int
116pt_reg_sstep(struct reg *reg, int step)
117{
118	register_t old;
119
120	old = reg->r_rflags;
121	if (step)
122		reg->r_rflags |= 0x0100;
123	else
124		reg->r_rflags &= ~0x0100;
125	return (old != reg->r_rflags); /* changed ? */
126}
127