Merge remote-tracking branch 'remotes/cohuck-gitlab/tags/s390x-20210121' into staging
[qemu.git] / target / avr / gdbstub.c
1 /*
2 * QEMU AVR gdbstub
3 *
4 * Copyright (c) 2016-2020 Michael Rolnik
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see
18 * <http://www.gnu.org/licenses/lgpl-2.1.html>
19 */
20
21 #include "qemu/osdep.h"
22 #include "exec/gdbstub.h"
23
24 int avr_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
25 {
26 AVRCPU *cpu = AVR_CPU(cs);
27 CPUAVRState *env = &cpu->env;
28
29 /* R */
30 if (n < 32) {
31 return gdb_get_reg8(mem_buf, env->r[n]);
32 }
33
34 /* SREG */
35 if (n == 32) {
36 uint8_t sreg = cpu_get_sreg(env);
37
38 return gdb_get_reg8(mem_buf, sreg);
39 }
40
41 /* SP */
42 if (n == 33) {
43 return gdb_get_reg16(mem_buf, env->sp & 0x0000ffff);
44 }
45
46 /* PC */
47 if (n == 34) {
48 return gdb_get_reg32(mem_buf, env->pc_w * 2);
49 }
50
51 return 0;
52 }
53
54 int avr_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
55 {
56 AVRCPU *cpu = AVR_CPU(cs);
57 CPUAVRState *env = &cpu->env;
58
59 /* R */
60 if (n < 32) {
61 env->r[n] = *mem_buf;
62 return 1;
63 }
64
65 /* SREG */
66 if (n == 32) {
67 cpu_set_sreg(env, *mem_buf);
68 return 1;
69 }
70
71 /* SP */
72 if (n == 33) {
73 env->sp = lduw_p(mem_buf);
74 return 2;
75 }
76
77 /* PC */
78 if (n == 34) {
79 env->pc_w = ldl_p(mem_buf) / 2;
80 return 4;
81 }
82
83 return 0;
84 }