Merge remote-tracking branch 'remotes/alistair23/tags/pull-riscv-to-apply-20210921...
[qemu.git] / target / openrisc / gdbstub.c
1 /*
2 * OpenRISC 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 "exec/gdbstub.h"
23
24 int openrisc_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
25 {
26 OpenRISCCPU *cpu = OPENRISC_CPU(cs);
27 CPUOpenRISCState *env = &cpu->env;
28
29 if (n < 32) {
30 return gdb_get_reg32(mem_buf, cpu_get_gpr(env, n));
31 } else {
32 switch (n) {
33 case 32: /* PPC */
34 return gdb_get_reg32(mem_buf, env->ppc);
35
36 case 33: /* NPC (equals PC) */
37 return gdb_get_reg32(mem_buf, env->pc);
38
39 case 34: /* SR */
40 return gdb_get_reg32(mem_buf, cpu_get_sr(env));
41
42 default:
43 break;
44 }
45 }
46 return 0;
47 }
48
49 int openrisc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
50 {
51 OpenRISCCPU *cpu = OPENRISC_CPU(cs);
52 CPUClass *cc = CPU_GET_CLASS(cs);
53 CPUOpenRISCState *env = &cpu->env;
54 uint32_t tmp;
55
56 if (n > cc->gdb_num_core_regs) {
57 return 0;
58 }
59
60 tmp = ldl_p(mem_buf);
61
62 if (n < 32) {
63 cpu_set_gpr(env, n, tmp);
64 } else {
65 switch (n) {
66 case 32: /* PPC */
67 env->ppc = tmp;
68 break;
69
70 case 33: /* NPC (equals PC) */
71 /* If setting PC to something different,
72 also clear delayed branch status. */
73 if (env->pc != tmp) {
74 env->pc = tmp;
75 env->dflag = 0;
76 }
77 break;
78
79 case 34: /* SR */
80 cpu_set_sr(env, tmp);
81 break;
82
83 default:
84 break;
85 }
86 }
87 return 4;
88 }