1 /*-
2 * Copyright (c) 2014 Justin Hibbits
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
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/11.1/sys/powerpc/powerpc/ptrace_machdep.c 277166 2015-01-14 07:01:21Z jhibbits $");
30
31 #include "opt_compat.h"
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/proc.h>
37 #include <sys/ptrace.h>
38 #include <sys/sysent.h>
39 #include <machine/altivec.h>
40 #include <machine/cpu.h>
41 #include <machine/md_var.h>
42 #include <machine/pcb.h>
43
44 int
45 cpu_ptrace(struct thread *td, int req, void *addr, int data)
46 {
47 int error;
48 struct pcb *pcb;
49 struct vec vec;
50
51 pcb = td->td_pcb;
52
53 bzero(&vec, sizeof(vec));
54
55 error = EINVAL;
56 switch (req) {
57 case PT_GETVRREGS:
58 if (!(cpu_features & PPC_FEATURE_HAS_ALTIVEC))
59 break;
60
61 if (pcb->pcb_flags & PCB_VEC) {
62 save_vec_nodrop(td);
63 memcpy(&vec, &pcb->pcb_vec, sizeof(vec));
64 }
65 error = copyout(&vec, addr, sizeof(vec));
66 break;
67 case PT_SETVRREGS:
68 if (!(cpu_features & PPC_FEATURE_HAS_ALTIVEC))
69 break;
70 error = copyin(addr, &vec, sizeof(vec));
71 if (error == 0) {
72 pcb->pcb_flags |= PCB_VEC;
73 memcpy(&pcb->pcb_vec, &vec, sizeof(vec));
74 }
75 break;
76
77 default:
78 break;
79 }
80
81 return (error);
82 }
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