1 /* $NetBSD: process_machdep.c,v 1.5 2023/05/07 12:41:49 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2014 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas of 3am Software Foundry.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33
34 __RCSID("$NetBSD: process_machdep.c,v 1.5 2023/05/07 12:41:49 skrll Exp $");
35
36 #include <sys/param.h>
37 #include <sys/ptrace.h>
38
39 #include <uvm/uvm_extern.h>
40
41 #include <riscv/frame.h>
42 #include <riscv/locore.h>
43
44 int
process_read_regs(struct lwp * l,struct reg * regs)45 process_read_regs(struct lwp *l, struct reg *regs)
46 {
47 //struct trapframe * const tf = l->l_md.md_utf;
48
49 *regs = l->l_md.md_utf->tf_regs;
50
51 return 0;
52 }
53
54 int
process_write_regs(struct lwp * l,const struct reg * regs)55 process_write_regs(struct lwp *l, const struct reg *regs)
56 {
57 //struct trapframe * const tf = l->l_md.md_utf;
58
59 l->l_md.md_utf->tf_regs = *regs;
60
61 return 0;
62 }
63
64 int
process_read_fpregs(struct lwp * l,struct fpreg * fpregs,size_t * sz)65 process_read_fpregs(struct lwp *l, struct fpreg *fpregs, size_t *sz)
66 {
67 struct pcb * const pcb = lwp_getpcb(l);
68
69 /* Is the process using the fpu? */
70 if (!fpu_valid_p(l)) {
71 memset(fpregs, 0, sizeof (*fpregs));
72 return 0;
73 }
74 fpu_save(l);
75 *fpregs = pcb->pcb_fpregs;
76
77 return 0;
78 }
79
80 int
process_write_fpregs(struct lwp * l,const struct fpreg * fpregs,size_t sz)81 process_write_fpregs(struct lwp *l, const struct fpreg *fpregs, size_t sz)
82 {
83 struct pcb * const pcb = lwp_getpcb(l);
84
85 fpu_replace(l);
86 pcb->pcb_fpregs = *fpregs;
87
88 return 0;
89 }
90
91 /*
92 * Set the process's program counter.
93 */
94 int
process_set_pc(struct lwp * l,void * addr)95 process_set_pc(struct lwp *l, void *addr)
96 {
97 //struct trapframe * const tf = l->l_md.md_utf;
98
99 l->l_md.md_utf->tf_pc = (register_t)addr;
100
101 return 0;
102 }
103