xref: /freebsd/lib/libthread_db/arch/powerpc/libpthread_md.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*
2  * Copyright (c) 2006 Marcel Moolenaar
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include <string.h>
31 #include <sys/types.h>
32 #include <proc_service.h>
33 #include <thread_db.h>
34 
35 #include "libpthread_db.h"
36 
37 void
38 pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
39 {
40 	mcontext_t *mc = &uc->uc_mcontext;
41 
42 	memcpy(mc->mc_frame, r, MIN(sizeof(mc->mc_frame), sizeof(*r)));
43 }
44 
45 void
46 pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
47 {
48 	const mcontext_t *mc = &uc->uc_mcontext;
49 
50 	memcpy(r, mc->mc_frame, MIN(sizeof(mc->mc_frame), sizeof(*r)));
51 }
52 
53 void
54 pt_fpreg_to_ucontext(const struct fpreg *r, ucontext_t *uc)
55 {
56 	mcontext_t *mc = &uc->uc_mcontext;
57 
58 	memcpy(mc->mc_fpreg, r, MIN(sizeof(mc->mc_fpreg), sizeof(*r)));
59 	mc->mc_flags |= _MC_FP_VALID;
60 }
61 
62 void
63 pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
64 {
65 	const mcontext_t *mc = &uc->uc_mcontext;
66 
67 	if (mc->mc_flags & _MC_FP_VALID)
68 		memcpy(r, mc->mc_fpreg, MIN(sizeof(mc->mc_fpreg), sizeof(*r)));
69 	else
70 		memset(r, 0, sizeof(*r));
71 }
72 
73 void
74 pt_md_init(void)
75 {
76 }
77 
78 int
79 pt_reg_sstep(struct reg *reg, int step)
80 {
81 
82 	/* XXX */
83 }
84