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s390x/gdb: expose virtualization specific registers
[thirdparty/qemu.git] / target-s390x / gdbstub.c
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1/*
2 * s390x 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 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 */
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20#include "config.h"
21#include "qemu-common.h"
22#include "exec/gdbstub.h"
23#include "qemu/bitops.h"
cfae5c90 24
5b50e790 25int s390_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
cfae5c90 26{
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27 S390CPU *cpu = S390_CPU(cs);
28 CPUS390XState *env = &cpu->env;
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29 uint64_t val;
30 int cc_op;
31
32 switch (n) {
33 case S390_PSWM_REGNUM:
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34 if (tcg_enabled()) {
35 cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst,
36 env->cc_vr);
37 val = deposit64(env->psw.mask, 44, 2, cc_op);
38 return gdb_get_regl(mem_buf, val);
39 }
40 return gdb_get_regl(mem_buf, env->psw.mask);
cfae5c90 41 case S390_PSWA_REGNUM:
986a2998 42 return gdb_get_regl(mem_buf, env->psw.addr);
cfae5c90 43 case S390_R0_REGNUM ... S390_R15_REGNUM:
218829db 44 return gdb_get_regl(mem_buf, env->regs[n - S390_R0_REGNUM]);
cfae5c90 45 }
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46 return 0;
47}
48
5b50e790 49int s390_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
cfae5c90 50{
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51 S390CPU *cpu = S390_CPU(cs);
52 CPUS390XState *env = &cpu->env;
73d510c9 53 target_ulong tmpl = ldtul_p(mem_buf);
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54
55 switch (n) {
56 case S390_PSWM_REGNUM:
57 env->psw.mask = tmpl;
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58 if (tcg_enabled()) {
59 env->cc_op = extract64(tmpl, 44, 2);
60 }
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61 break;
62 case S390_PSWA_REGNUM:
63 env->psw.addr = tmpl;
64 break;
65 case S390_R0_REGNUM ... S390_R15_REGNUM:
218829db 66 env->regs[n - S390_R0_REGNUM] = tmpl;
cfae5c90 67 break;
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68 default:
69 return 0;
70 }
71 return 8;
72}
73
74/* the values represent the positions in s390-acr.xml */
75#define S390_A0_REGNUM 0
76#define S390_A15_REGNUM 15
77/* total number of registers in s390-acr.xml */
78#define S390_NUM_AC_REGS 16
79
80static int cpu_read_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
81{
82 switch (n) {
cfae5c90 83 case S390_A0_REGNUM ... S390_A15_REGNUM:
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84 return gdb_get_reg32(mem_buf, env->aregs[n]);
85 default:
86 return 0;
87 }
88}
89
90static int cpu_write_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
91{
92 switch (n) {
93 case S390_A0_REGNUM ... S390_A15_REGNUM:
94 env->aregs[n] = ldl_p(mem_buf);
55b1b753 95 cpu_synchronize_post_init(ENV_GET_CPU(env));
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96 return 4;
97 default:
98 return 0;
99 }
100}
101
102/* the values represent the positions in s390-fpr.xml */
103#define S390_FPC_REGNUM 0
104#define S390_F0_REGNUM 1
105#define S390_F15_REGNUM 16
106/* total number of registers in s390-fpr.xml */
107#define S390_NUM_FP_REGS 17
108
109static int cpu_read_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
110{
111 switch (n) {
cfae5c90 112 case S390_FPC_REGNUM:
73d510c9 113 return gdb_get_reg32(mem_buf, env->fpc);
cfae5c90 114 case S390_F0_REGNUM ... S390_F15_REGNUM:
c498d8e3 115 return gdb_get_reg64(mem_buf, get_freg(env, n - S390_F0_REGNUM)->ll);
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116 default:
117 return 0;
118 }
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119}
120
121static int cpu_write_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
122{
123 switch (n) {
124 case S390_FPC_REGNUM:
125 env->fpc = ldl_p(mem_buf);
126 return 4;
127 case S390_F0_REGNUM ... S390_F15_REGNUM:
c498d8e3 128 get_freg(env, n - S390_F0_REGNUM)->ll = ldtul_p(mem_buf);
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129 return 8;
130 default:
131 return 0;
132 }
133}
134
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135/* the values represent the positions in s390-vx.xml */
136#define S390_V0L_REGNUM 0
137#define S390_V15L_REGNUM 15
138#define S390_V16_REGNUM 16
139#define S390_V31_REGNUM 31
140/* total number of registers in s390-vx.xml */
141#define S390_NUM_VREGS 32
142
143static int cpu_read_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
144{
145 int ret;
146
147 switch (n) {
148 case S390_V0L_REGNUM ... S390_V15L_REGNUM:
149 ret = gdb_get_reg64(mem_buf, env->vregs[n][1].ll);
150 break;
151 case S390_V16_REGNUM ... S390_V31_REGNUM:
152 ret = gdb_get_reg64(mem_buf, env->vregs[n][0].ll);
153 ret += gdb_get_reg64(mem_buf + 8, env->vregs[n][1].ll);
154 break;
155 default:
156 ret = 0;
157 }
158
159 return ret;
160}
161
162static int cpu_write_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
163{
164 switch (n) {
165 case S390_V0L_REGNUM ... S390_V15L_REGNUM:
166 env->vregs[n][1].ll = ldtul_p(mem_buf + 8);
167 return 8;
168 case S390_V16_REGNUM ... S390_V31_REGNUM:
169 env->vregs[n][0].ll = ldtul_p(mem_buf);
170 env->vregs[n][1].ll = ldtul_p(mem_buf + 8);
171 return 16;
172 default:
173 return 0;
174 }
175}
176
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177/* the values represent the positions in s390-cr.xml */
178#define S390_C0_REGNUM 0
179#define S390_C15_REGNUM 15
180/* total number of registers in s390-cr.xml */
181#define S390_NUM_C_REGS 16
182
183#ifndef CONFIG_USER_ONLY
184static int cpu_read_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
185{
186 switch (n) {
187 case S390_C0_REGNUM ... S390_C15_REGNUM:
188 return gdb_get_regl(mem_buf, env->cregs[n]);
189 default:
190 return 0;
191 }
192}
193
194static int cpu_write_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
195{
196 switch (n) {
197 case S390_C0_REGNUM ... S390_C15_REGNUM:
198 env->cregs[n] = ldtul_p(mem_buf);
199 if (tcg_enabled()) {
200 tlb_flush(ENV_GET_CPU(env), 1);
201 }
202 cpu_synchronize_post_init(ENV_GET_CPU(env));
203 return 8;
204 default:
205 return 0;
206 }
207}
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208
209/* the values represent the positions in s390-virt.xml */
210#define S390_VIRT_CKC_REGNUM 0
211#define S390_VIRT_CPUTM_REGNUM 1
212#define S390_VIRT_BEA_REGNUM 2
213#define S390_VIRT_PREFIX_REGNUM 3
214#define S390_VIRT_PP_REGNUM 4
215#define S390_VIRT_PFT_REGNUM 5
216#define S390_VIRT_PFS_REGNUM 6
217#define S390_VIRT_PFC_REGNUM 7
218/* total number of registers in s390-virt.xml */
219#define S390_NUM_VIRT_REGS 8
220
221static int cpu_read_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
222{
223 switch (n) {
224 case S390_VIRT_CKC_REGNUM:
225 return gdb_get_regl(mem_buf, env->ckc);
226 case S390_VIRT_CPUTM_REGNUM:
227 return gdb_get_regl(mem_buf, env->cputm);
228 case S390_VIRT_BEA_REGNUM:
229 return gdb_get_regl(mem_buf, env->gbea);
230 case S390_VIRT_PREFIX_REGNUM:
231 return gdb_get_regl(mem_buf, env->psa);
232 case S390_VIRT_PP_REGNUM:
233 return gdb_get_regl(mem_buf, env->pp);
234 case S390_VIRT_PFT_REGNUM:
235 return gdb_get_regl(mem_buf, env->pfault_token);
236 case S390_VIRT_PFS_REGNUM:
237 return gdb_get_regl(mem_buf, env->pfault_select);
238 case S390_VIRT_PFC_REGNUM:
239 return gdb_get_regl(mem_buf, env->pfault_compare);
240 default:
241 return 0;
242 }
243}
244
245static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
246{
247 switch (n) {
248 case S390_VIRT_CKC_REGNUM:
249 env->ckc = ldtul_p(mem_buf);
250 cpu_synchronize_post_init(ENV_GET_CPU(env));
251 return 8;
252 case S390_VIRT_CPUTM_REGNUM:
253 env->cputm = ldtul_p(mem_buf);
254 cpu_synchronize_post_init(ENV_GET_CPU(env));
255 return 8;
256 case S390_VIRT_BEA_REGNUM:
257 env->gbea = ldtul_p(mem_buf);
258 cpu_synchronize_post_init(ENV_GET_CPU(env));
259 return 8;
260 case S390_VIRT_PREFIX_REGNUM:
261 env->psa = ldtul_p(mem_buf);
262 cpu_synchronize_post_init(ENV_GET_CPU(env));
263 return 8;
264 case S390_VIRT_PP_REGNUM:
265 env->pp = ldtul_p(mem_buf);
266 cpu_synchronize_post_init(ENV_GET_CPU(env));
267 return 8;
268 case S390_VIRT_PFT_REGNUM:
269 env->pfault_token = ldtul_p(mem_buf);
270 cpu_synchronize_post_init(ENV_GET_CPU(env));
271 return 8;
272 case S390_VIRT_PFS_REGNUM:
273 env->pfault_select = ldtul_p(mem_buf);
274 cpu_synchronize_post_init(ENV_GET_CPU(env));
275 return 8;
276 case S390_VIRT_PFC_REGNUM:
277 env->pfault_compare = ldtul_p(mem_buf);
278 cpu_synchronize_post_init(ENV_GET_CPU(env));
279 return 8;
280 default:
281 return 0;
282 }
283}
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284#endif
285
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286void s390_cpu_gdb_init(CPUState *cs)
287{
288 gdb_register_coprocessor(cs, cpu_read_ac_reg,
289 cpu_write_ac_reg,
290 S390_NUM_AC_REGS, "s390-acr.xml", 0);
291
292 gdb_register_coprocessor(cs, cpu_read_fp_reg,
293 cpu_write_fp_reg,
294 S390_NUM_FP_REGS, "s390-fpr.xml", 0);
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295
296 gdb_register_coprocessor(cs, cpu_read_vreg,
297 cpu_write_vreg,
298 S390_NUM_VREGS, "s390-vx.xml", 0);
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299
300#ifndef CONFIG_USER_ONLY
301 gdb_register_coprocessor(cs, cpu_read_c_reg,
302 cpu_write_c_reg,
303 S390_NUM_C_REGS, "s390-cr.xml", 0);
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304
305 if (kvm_enabled()) {
306 gdb_register_coprocessor(cs, cpu_read_virt_reg,
307 cpu_write_virt_reg,
308 S390_NUM_VIRT_REGS, "s390-virt.xml", 0);
309 }
5b9f6345 310#endif
cfae5c90 311}