libpthread_md.c revision 132950 
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: head/lib/libthread_db/arch/amd64/libpthread_md.c 132950 2004-08-01 02:08:39Z davidxu $");
30
31#include <sys/procfs.h>
32#include <ucontext.h>
33
34void
35pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
36{
37	mcontext_t *mc = &uc->uc_mcontext;
38
39	mc->mc_rdi = r->r_rdi;
40	mc->mc_rsi = r->r_rsi;
41	mc->mc_rdx = r->r_rdx;
42	mc->mc_rcx = r->r_rcx;
43	mc->mc_r8 = r->r_r8;
44	mc->mc_r9 = r->r_r9;
45	mc->mc_rax = r->r_rax;
46	mc->mc_rbx = r->r_rbx;
47	mc->mc_rbp = r->r_rbp;
48	mc->mc_r10 = r->r_r10;
49	mc->mc_r11 = r->r_r11;
50	mc->mc_r12 = r->r_r12;
51	mc->mc_r13 = r->r_r13;
52	mc->mc_r14 = r->r_r14;
53	mc->mc_r15 = r->r_r15;
54	mc->mc_rip = r->r_rip;
55	mc->mc_cs = r->r_cs;
56	mc->mc_rflags = r->r_rflags;
57	mc->mc_rsp = r->r_rsp;
58	mc->mc_ss = r->r_ss;
59}
60
61void
62pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
63{
64	const mcontext_t *mc = &uc->uc_mcontext;
65
66	r->r_rdi = mc->mc_rdi;
67	r->r_rsi = mc->mc_rsi;
68	r->r_rdx = mc->mc_rdx;
69	r->r_rcx = mc->mc_rcx;
70	r->r_r8 = mc->mc_r8;
71	r->r_r9 = mc->mc_r9;
72	r->r_rax = mc->mc_rax;
73	r->r_rbx = mc->mc_rbx;
74	r->r_rbp = mc->mc_rbp;
75	r->r_r10 = mc->mc_r10;
76	r->r_r11 = mc->mc_r11;
77	r->r_r12 = mc->mc_r12;
78	r->r_r13 = mc->mc_r13;
79	r->r_r14 = mc->mc_r14;
80	r->r_r15 = mc->mc_r15;
81	r->r_rip = mc->mc_rip;
82	r->r_cs = mc->mc_cs;
83	r->r_rflags = mc->mc_rflags;
84	r->r_rsp = mc->mc_rsp;
85	r->r_ss = mc->mc_ss;
86}
87
88void
89pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
90{
91	memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(r));
92}
93
94void
95pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
96{
97	memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(r));
98}
99
100void
101pt_md_init(void)
102{
103	/* Nothing to do */
104}
105
106int
107pt_reg_sstep(struct reg *reg, int step)
108{
109	register_t old;
110
111	old = reg->r_rflags;
112	if (step)
113		reg->r_rflags |= 0x0100;
114	else
115		reg->r_rflags &= ~0x0100;
116	return (old != reg->r_rflags); /* changed ? */
117}
118