1 /*
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
10 * version 2.1 of the License, or (at your option) any later version.
11 *
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 */
20 #include "qemu/osdep.h"
21 #include "cpu.h"
22 #include "gdbstub/helpers.h"
23
m68k_cpu_gdb_read_register(CPUState * cs,GByteArray * mem_buf,int n)24 int m68k_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
25 {
26 CPUM68KState *env = cpu_env(cs);
27
28 if (n < 8) {
29 /* D0-D7 */
30 return gdb_get_reg32(mem_buf, env->dregs[n]);
31 } else if (n < 16) {
32 /* A0-A7 */
33 return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
34 } else {
35 switch (n) {
36 case 16:
37 /* 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));
39 case 17:
40 return gdb_get_reg32(mem_buf, env->pc);
41 }
42 }
43 /*
44 * FP registers not included here because they vary between
45 * ColdFire and m68k. Use XML bits for these.
46 */
47 return 0;
48 }
49
m68k_cpu_gdb_write_register(CPUState * cs,uint8_t * mem_buf,int n)50 int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
51 {
52 CPUM68KState *env = cpu_env(cs);
53 uint32_t tmp;
54
55 tmp = ldl_be_p(mem_buf);
56
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:
66 cpu_m68k_set_sr(env, tmp);
67 break;
68 case 17:
69 env->pc = tmp;
70 break;
71 default:
72 return 0;
73 }
74 }
75 return 4;
76 }
77