1 /*-
2 * Copyright (c) 2015 Ruslan Bukin <[email protected]>
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/cdefs.h>
36 #include <sys/types.h>
37 #include <string.h>
38 #include <thread_db.h>
39
40 #include "libpthread_db.h"
41
42 void
pt_reg_to_ucontext(const struct reg * r,ucontext_t * uc)43 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
44 {
45 mcontext_t *mc;
46
47 mc = &uc->uc_mcontext;
48
49 memcpy(mc->mc_gpregs.gp_t, r->t, sizeof(mc->mc_gpregs.gp_t));
50 memcpy(mc->mc_gpregs.gp_s, r->s, sizeof(mc->mc_gpregs.gp_s));
51 memcpy(mc->mc_gpregs.gp_a, r->a, sizeof(mc->mc_gpregs.gp_a));
52 mc->mc_gpregs.gp_ra = r->ra;
53 mc->mc_gpregs.gp_sp = r->sp;
54 mc->mc_gpregs.gp_gp = r->gp;
55 mc->mc_gpregs.gp_tp = r->tp;
56 mc->mc_gpregs.gp_sepc = r->sepc;
57 mc->mc_gpregs.gp_sstatus = r->sstatus;
58 }
59
60 void
pt_ucontext_to_reg(const ucontext_t * uc,struct reg * r)61 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
62 {
63 const mcontext_t *mc;
64
65 mc = &uc->uc_mcontext;
66
67 memcpy(r->t, mc->mc_gpregs.gp_t, sizeof(mc->mc_gpregs.gp_t));
68 memcpy(r->s, mc->mc_gpregs.gp_s, sizeof(mc->mc_gpregs.gp_s));
69 memcpy(r->a, mc->mc_gpregs.gp_a, sizeof(mc->mc_gpregs.gp_a));
70 r->ra = mc->mc_gpregs.gp_ra;
71 r->sp = mc->mc_gpregs.gp_sp;
72 r->gp = mc->mc_gpregs.gp_gp;
73 r->tp = mc->mc_gpregs.gp_tp;
74 r->sepc = mc->mc_gpregs.gp_sepc;
75 r->sstatus = mc->mc_gpregs.gp_sstatus;
76 }
77
78 void
pt_fpreg_to_ucontext(const struct fpreg * r __unused,ucontext_t * uc __unused)79 pt_fpreg_to_ucontext(const struct fpreg *r __unused, ucontext_t *uc __unused)
80 {
81 mcontext_t *mc = &uc->uc_mcontext;
82
83 memcpy(&mc->mc_fpregs, r, sizeof(*r));
84 mc->mc_flags |= _MC_FP_VALID;
85 }
86
87 void
pt_ucontext_to_fpreg(const ucontext_t * uc __unused,struct fpreg * r __unused)88 pt_ucontext_to_fpreg(const ucontext_t *uc __unused, struct fpreg *r __unused)
89 {
90 const mcontext_t *mc = &uc->uc_mcontext;
91
92 if (mc->mc_flags & _MC_FP_VALID)
93 memcpy(r, &mc->mc_fpregs, sizeof(*r));
94 else
95 memset(r, 0, sizeof(*r));
96 }
97
98 void
pt_md_init(void)99 pt_md_init(void)
100 {
101 }
102
103 int
pt_reg_sstep(struct reg * reg __unused,int step __unused)104 pt_reg_sstep(struct reg *reg __unused, int step __unused)
105 {
106
107 return (0);
108 }
109