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Andreas Färberc88de142013-07-07 12:33:56 +02001/*
2 * m68k gdb server stub
3 *
4 * Copyright (c) 2003-2005 Fabrice Bellard
5 * Copyright (c) 2013 SUSE LINUX Products GmbH
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
Thomas Huthd749fb82019-01-29 14:43:58 +010010 * version 2.1 of the License, or (at your option) any later version.
Andreas Färberc88de142013-07-07 12:33:56 +020011 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
19 */
Peter Maydelld8416662016-01-26 18:17:23 +000020#include "qemu/osdep.h"
Paolo Bonzini33c11872016-03-15 16:58:45 +010021#include "cpu.h"
Alex Bennée4ea5fe92023-03-02 18:57:56 -080022#include "gdbstub/helpers.h"
Andreas Färberc88de142013-07-07 12:33:56 +020023
Alex Bennéea010bdb2020-03-16 17:21:41 +000024int m68k_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
Andreas Färberc88de142013-07-07 12:33:56 +020025{
Philippe Mathieu-Daudée22a4562024-01-29 17:44:58 +010026 CPUM68KState *env = cpu_env(cs);
Andreas Färber5b50e792013-06-29 04:18:45 +020027
Andreas Färberc88de142013-07-07 12:33:56 +020028 if (n < 8) {
29 /* D0-D7 */
Andreas Färber986a2992013-07-07 13:05:05 +020030 return gdb_get_reg32(mem_buf, env->dregs[n]);
Andreas Färberc88de142013-07-07 12:33:56 +020031 } else if (n < 16) {
32 /* A0-A7 */
Andreas Färber986a2992013-07-07 13:05:05 +020033 return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
Andreas Färberc88de142013-07-07 12:33:56 +020034 } else {
35 switch (n) {
36 case 16:
Lucien Murray-Pittsbf1fa692019-06-09 19:51:54 +090037 /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
38 return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
Andreas Färberc88de142013-07-07 12:33:56 +020039 case 17:
Andreas Färber986a2992013-07-07 13:05:05 +020040 return gdb_get_reg32(mem_buf, env->pc);
Andreas Färberc88de142013-07-07 12:33:56 +020041 }
42 }
Lucien Murray-Pitts808d77b2019-06-07 08:41:25 +090043 /*
44 * FP registers not included here because they vary between
45 * ColdFire and m68k. Use XML bits for these.
46 */
Andreas Färberc88de142013-07-07 12:33:56 +020047 return 0;
48}
49
Andreas Färber5b50e792013-06-29 04:18:45 +020050int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
Andreas Färberc88de142013-07-07 12:33:56 +020051{
Philippe Mathieu-Daudée22a4562024-01-29 17:44:58 +010052 CPUM68KState *env = cpu_env(cs);
Andreas Färberc88de142013-07-07 12:33:56 +020053 uint32_t tmp;
54
Philippe Mathieu-Daudé3a76d302024-10-04 13:30:34 -030055 tmp = ldl_be_p(mem_buf);
Andreas Färberc88de142013-07-07 12:33:56 +020056
57 if (n < 8) {
58 /* D0-D7 */
59 env->dregs[n] = tmp;
60 } else if (n < 16) {
61 /* A0-A7 */
62 env->aregs[n - 8] = tmp;
63 } else {
64 switch (n) {
65 case 16:
Laurent Vivier6e22b282018-01-04 02:29:12 +010066 cpu_m68k_set_sr(env, tmp);
Andreas Färberc88de142013-07-07 12:33:56 +020067 break;
68 case 17:
69 env->pc = tmp;
70 break;
71 default:
72 return 0;
73 }
74 }
75 return 4;
76}