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
36 static int has_xmm_regs;
37
38 void
pt_reg_to_ucontext(const struct reg * r,ucontext_t * uc)39 pt_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
45 void
pt_ucontext_to_reg(const ucontext_t * uc,struct reg * r)46 pt_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
52 void
pt_fpreg_to_ucontext(const struct fpreg * r,ucontext_t * uc)53 pt_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
67 void
pt_ucontext_to_fpreg(const ucontext_t * uc,struct fpreg * r)68 pt_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
81 void
pt_fxsave_to_ucontext(const char * r,ucontext_t * uc)82 pt_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
88 void
pt_ucontext_to_fxsave(const ucontext_t * uc,char * r)89 pt_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
95 void
pt_md_init(void)96 pt_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
105 int
pt_reg_sstep(struct reg * reg,int step)106 pt_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