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