1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004 David Xu <davidxu@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/types.h>
30#include <machine/npx.h>
31#include <string.h>
32#include <thread_db.h>
33
34#include "libpthread_db.h"
35
36static int has_xmm_regs;
37
38void
39pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
40{
41	memcpy(&uc->uc_mcontext.mc_fs, &r->r_fs, 18*4);
42	uc->uc_mcontext.mc_gs = r->r_gs;
43}
44
45void
46pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
47{
48	memcpy(&r->r_fs, &uc->uc_mcontext.mc_fs, 18*4);
49	r->r_gs = uc->uc_mcontext.mc_gs;
50}
51
52void
53pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
54{
55	if (!has_xmm_regs)
56		memcpy(&uc->uc_mcontext.mc_fpstate, r,
57			sizeof(struct save87));
58	else {
59		int i;
60		struct savexmm *sx = (struct savexmm *)&uc->uc_mcontext.mc_fpstate;
61		memcpy(&sx->sv_env, &r->fpr_env, sizeof(r->fpr_env));
62		for (i = 0; i < 8; ++i)
63			memcpy(&sx->sv_fp[i].fp_acc, &r->fpr_acc[i], 10);
64	}
65}
66
67void
68pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
69{
70	if (!has_xmm_regs)
71		memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct save87));
72	else {
73		int i;
74		const struct savexmm *sx = (const struct savexmm *)&uc->uc_mcontext.mc_fpstate;
75		memcpy(&r->fpr_env, &sx->sv_env, sizeof(r->fpr_env));
76		for (i = 0; i < 8; ++i)
77			memcpy(&r->fpr_acc[i], &sx->sv_fp[i].fp_acc, 10);
78	}
79}
80
81void
82pt_fxsave_to_ucontext(const char* r, ucontext_t *uc)
83{
84	if (has_xmm_regs)
85		memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm));
86}
87
88void
89pt_ucontext_to_fxsave(const ucontext_t *uc, char *r)
90{
91	if (has_xmm_regs)
92		memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm));
93}
94
95void
96pt_md_init(void)
97{
98	ucontext_t uc;
99
100	getcontext(&uc);
101	if (uc.uc_mcontext.mc_fpformat == _MC_FPFMT_XMM)
102	    has_xmm_regs = 1;
103}
104
105int
106pt_reg_sstep(struct reg *reg, int step)
107{
108	unsigned int old;
109
110	old = reg->r_eflags;
111	if (step)
112		reg->r_eflags |= 0x0100;
113	else
114		reg->r_eflags &= ~0x0100;
115	return (old != reg->r_eflags); /* changed ? */
116}
117
118