1/*
2 * Copyright (c) 2004 David Xu <davidxu@freebsd.org>
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 <sys/types.h>
31#include <machine/npx.h>
32#include <string.h>
33#include <thread_db.h>
34
35#include "libpthread_db.h"
36
37static int has_xmm_regs;
38
39void
40pt_reg_to_ucontext(const struct reg *r, ucontext_t *uc)
41{
42	memcpy(&uc->uc_mcontext.mc_fs, &r->r_fs, 18*4);
43	uc->uc_mcontext.mc_gs = r->r_gs;
44}
45
46void
47pt_ucontext_to_reg(const ucontext_t *uc, struct reg *r)
48{
49	memcpy(&r->r_fs, &uc->uc_mcontext.mc_fs, 18*4);
50	r->r_gs = uc->uc_mcontext.mc_gs;
51}
52
53void
54pt_fpreg_to_ucontext(const struct fpreg* r, ucontext_t *uc)
55{
56	if (!has_xmm_regs)
57		memcpy(&uc->uc_mcontext.mc_fpstate, r,
58			sizeof(struct save87));
59	else {
60		int i;
61		struct savexmm *sx = (struct savexmm *)&uc->uc_mcontext.mc_fpstate;
62		memcpy(&sx->sv_env, &r->fpr_env, sizeof(r->fpr_env));
63		for (i = 0; i < 8; ++i)
64			memcpy(&sx->sv_fp[i].fp_acc, &r->fpr_acc[i], 10);
65	}
66}
67
68void
69pt_ucontext_to_fpreg(const ucontext_t *uc, struct fpreg *r)
70{
71	if (!has_xmm_regs)
72		memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct save87));
73	else {
74		int i;
75		const struct savexmm *sx = (const struct savexmm *)&uc->uc_mcontext.mc_fpstate;
76		memcpy(&r->fpr_env, &sx->sv_env, sizeof(r->fpr_env));
77		for (i = 0; i < 8; ++i)
78			memcpy(&r->fpr_acc[i], &sx->sv_fp[i].fp_acc, 10);
79	}
80}
81
82void
83pt_fxsave_to_ucontext(const char* r, ucontext_t *uc)
84{
85	if (has_xmm_regs)
86		memcpy(&uc->uc_mcontext.mc_fpstate, r, sizeof(struct savexmm));
87}
88
89void
90pt_ucontext_to_fxsave(const ucontext_t *uc, char *r)
91{
92	if (has_xmm_regs)
93		memcpy(r, &uc->uc_mcontext.mc_fpstate, sizeof(struct savexmm));
94}
95
96void
97pt_md_init(void)
98{
99	ucontext_t uc;
100
101	getcontext(&uc);
102	if (uc.uc_mcontext.mc_fpformat == _MC_FPFMT_XMM)
103	    has_xmm_regs = 1;
104}
105
106int
107pt_reg_sstep(struct reg *reg, int step)
108{
109	unsigned int old;
110
111	old = reg->r_eflags;
112	if (step)
113		reg->r_eflags |= 0x0100;
114	else
115		reg->r_eflags &= ~0x0100;
116	return (old != reg->r_eflags); /* changed ? */
117}
118
119