1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 #include <sys/procfs.h>
32 #include <string.h>
33 #include <thread_db.h>
34 #include <ucontext.h>
35
36 #include "libpthread_db.h"
37
38 void
pt_reg_to_ucontext(const struct reg * r,ucontext_t * uc)39 pt_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
65 void
pt_ucontext_to_reg(const ucontext_t * uc,struct reg * r)66 pt_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
92 void
pt_fpreg_to_ucontext(const struct fpreg * r,ucontext_t * uc)93 pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
94 {
95
96 memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(*r));
97 }
98
99 void
pt_ucontext_to_fpreg(const ucontext_t * uc,struct fpreg * r)100 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
101 {
102
103 memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(*r));
104 }
105
106 void
pt_md_init(void)107 pt_md_init(void)
108 {
109
110 /* Nothing to do */
111 }
112
113 int
pt_reg_sstep(struct reg * reg,int step)114 pt_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