1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2004 Marcel Moolenaar
5 * Copyright (c) 2011 Marius Strobl <[email protected]>
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/types.h>
34 #include <string.h>
35 #include <thread_db.h>
36 #include <ucontext.h>
37 #include <machine/fsr.h>
38
39 #include "libpthread_db.h"
40
41 void
pt_reg_to_ucontext(const struct reg * r,ucontext_t * uc)42 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
43 {
44
45 memcpy(&uc->uc_mcontext, r, MIN(sizeof(uc->uc_mcontext), sizeof(*r)));
46 }
47
48 void
pt_ucontext_to_reg(const ucontext_t * uc,struct reg * r)49 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
50 {
51
52 memcpy(r, &uc->uc_mcontext, MIN(sizeof(uc->uc_mcontext), sizeof(*r)));
53 }
54
55 void
pt_fpreg_to_ucontext(const struct fpreg * r,ucontext_t * uc)56 pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
57 {
58 mcontext_t *mc = &uc->uc_mcontext;
59
60 memcpy(mc->mc_fp, r->fr_regs, MIN(sizeof(mc->mc_fp),
61 sizeof(r->fr_regs)));
62 mc->_mc_fsr = r->fr_fsr;
63 mc->_mc_gsr = r->fr_gsr;
64 mc->_mc_fprs |= FPRS_FEF;
65 }
66
67 void
pt_ucontext_to_fpreg(const ucontext_t * uc,struct fpreg * r)68 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
69 {
70 const mcontext_t *mc = &uc->uc_mcontext;
71
72 if ((mc->_mc_fprs & FPRS_FEF) != 0) {
73 memcpy(r->fr_regs, mc->mc_fp, MIN(sizeof(mc->mc_fp),
74 sizeof(r->fr_regs)));
75 r->fr_fsr = mc->_mc_fsr;
76 r->fr_gsr = mc->_mc_gsr;
77 } else
78 memset(r, 0, sizeof(*r));
79 }
80
81 void
pt_md_init(void)82 pt_md_init(void)
83 {
84
85 }
86
87 int
pt_reg_sstep(struct reg * reg __unused,int step __unused)88 pt_reg_sstep(struct reg *reg __unused, int step __unused)
89 {
90
91 return (0);
92 }
93