1 /*-
2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * Portions of this software were developed by SRI International and the
6 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
7 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Portions of this software were developed by the University of Cambridge
10 * Computer Laboratory as part of the CTSRD Project, with support from the
11 * UK Higher Education Innovation Fund (HEIF).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/types.h>
36 #include <string.h>
37 #include <thread_db.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 mcontext_t *mc;
45
46 mc = &uc->uc_mcontext;
47
48 memcpy(mc->mc_gpregs.gp_t, r->t, sizeof(mc->mc_gpregs.gp_t));
49 memcpy(mc->mc_gpregs.gp_s, r->s, sizeof(mc->mc_gpregs.gp_s));
50 memcpy(mc->mc_gpregs.gp_a, r->a, sizeof(mc->mc_gpregs.gp_a));
51 mc->mc_gpregs.gp_ra = r->ra;
52 mc->mc_gpregs.gp_sp = r->sp;
53 mc->mc_gpregs.gp_gp = r->gp;
54 mc->mc_gpregs.gp_tp = r->tp;
55 mc->mc_gpregs.gp_sepc = r->sepc;
56 mc->mc_gpregs.gp_sstatus = r->sstatus;
57 }
58
59 void
pt_ucontext_to_reg(const ucontext_t * uc,struct reg * r)60 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
61 {
62 const mcontext_t *mc;
63
64 mc = &uc->uc_mcontext;
65
66 memcpy(r->t, mc->mc_gpregs.gp_t, sizeof(mc->mc_gpregs.gp_t));
67 memcpy(r->s, mc->mc_gpregs.gp_s, sizeof(mc->mc_gpregs.gp_s));
68 memcpy(r->a, mc->mc_gpregs.gp_a, sizeof(mc->mc_gpregs.gp_a));
69 r->ra = mc->mc_gpregs.gp_ra;
70 r->sp = mc->mc_gpregs.gp_sp;
71 r->gp = mc->mc_gpregs.gp_gp;
72 r->tp = mc->mc_gpregs.gp_tp;
73 r->sepc = mc->mc_gpregs.gp_sepc;
74 r->sstatus = mc->mc_gpregs.gp_sstatus;
75 }
76
77 void
pt_fpreg_to_ucontext(const struct fpreg * r __unused,ucontext_t * uc __unused)78 pt_fpreg_to_ucontext(const struct fpreg *r __unused, ucontext_t *uc __unused)
79 {
80 mcontext_t *mc = &uc->uc_mcontext;
81
82 memcpy(&mc->mc_fpregs, r, sizeof(*r));
83 mc->mc_flags |= _MC_FP_VALID;
84 }
85
86 void
pt_ucontext_to_fpreg(const ucontext_t * uc __unused,struct fpreg * r __unused)87 pt_ucontext_to_fpreg(const ucontext_t *uc __unused, struct fpreg *r __unused)
88 {
89 const mcontext_t *mc = &uc->uc_mcontext;
90
91 if (mc->mc_flags & _MC_FP_VALID)
92 memcpy(r, &mc->mc_fpregs, sizeof(*r));
93 else
94 memset(r, 0, sizeof(*r));
95 }
96
97 void
pt_md_init(void)98 pt_md_init(void)
99 {
100 }
101
102 int
pt_reg_sstep(struct reg * reg __unused,int step __unused)103 pt_reg_sstep(struct reg *reg __unused, int step __unused)
104 {
105
106 return (0);
107 }
108