target-s390x/gdbstub.c

   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  */
  20 #include "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "cpu.h"
  23 #include "exec/exec-all.h"
  24 #include "exec/gdbstub.h"
  25 #include "qemu/bitops.h"
  26
  27 int s390_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  28 {
  29     S390CPU *cpu = S390_CPU(cs);
  30     CPUS390XState *env = &cpu->env;
  31     uint64_t val;
  32     int cc_op;
  33
  34     switch (n) {
  35     case S390_PSWM_REGNUM:
  36         if (tcg_enabled()) {
  37             cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst,
  38                             env->cc_vr);
  39             val = deposit64(env->psw.mask, 44, 2, cc_op);
  40             return gdb_get_regl(mem_buf, val);
  41         }
  42         return gdb_get_regl(mem_buf, env->psw.mask);
  43     case S390_PSWA_REGNUM:
  44         return gdb_get_regl(mem_buf, env->psw.addr);
  45     case S390_R0_REGNUM ... S390_R15_REGNUM:
  46         return gdb_get_regl(mem_buf, env->regs[n - S390_R0_REGNUM]);
  47     }
  48     return 0;
  49 }
  50
  51 int s390_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  52 {
  53     S390CPU *cpu = S390_CPU(cs);
  54     CPUS390XState *env = &cpu->env;
  55     target_ulong tmpl = ldtul_p(mem_buf);
  56
  57     switch (n) {
  58     case S390_PSWM_REGNUM:
  59         env->psw.mask = tmpl;
  60         if (tcg_enabled()) {
  61             env->cc_op = extract64(tmpl, 44, 2);
  62         }
  63         break;
  64     case S390_PSWA_REGNUM:
  65         env->psw.addr = tmpl;
  66         break;
  67     case S390_R0_REGNUM ... S390_R15_REGNUM:
  68         env->regs[n - S390_R0_REGNUM] = tmpl;
  69         break;
  70     default:
  71         return 0;
  72     }
  73     return 8;
  74 }
  75
  76 /* the values represent the positions in s390-acr.xml */
  77 #define S390_A0_REGNUM 0
  78 #define S390_A15_REGNUM 15
  79 /* total number of registers in s390-acr.xml */
  80 #define S390_NUM_AC_REGS 16
  81
  82 static int cpu_read_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
  83 {
  84     switch (n) {
  85     case S390_A0_REGNUM ... S390_A15_REGNUM:
  86         return gdb_get_reg32(mem_buf, env->aregs[n]);
  87     default:
  88         return 0;
  89     }
  90 }
  91
  92 static int cpu_write_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
  93 {
  94     switch (n) {
  95     case S390_A0_REGNUM ... S390_A15_REGNUM:
  96         env->aregs[n] = ldl_p(mem_buf);
  97         cpu_synchronize_post_init(ENV_GET_CPU(env));
  98         return 4;
  99     default:
 100         return 0;
 101     }
 102 }
 103
 104 /* the values represent the positions in s390-fpr.xml */
 105 #define S390_FPC_REGNUM 0
 106 #define S390_F0_REGNUM 1
 107 #define S390_F15_REGNUM 16
 108 /* total number of registers in s390-fpr.xml */
 109 #define S390_NUM_FP_REGS 17
 110
 111 static int cpu_read_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 112 {
 113     switch (n) {
 114     case S390_FPC_REGNUM:
 115         return gdb_get_reg32(mem_buf, env->fpc);
 116     case S390_F0_REGNUM ... S390_F15_REGNUM:
 117         return gdb_get_reg64(mem_buf, get_freg(env, n - S390_F0_REGNUM)->ll);
 118     default:
 119         return 0;
 120     }
 121 }
 122
 123 static int cpu_write_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 124 {
 125     switch (n) {
 126     case S390_FPC_REGNUM:
 127         env->fpc = ldl_p(mem_buf);
 128         return 4;
 129     case S390_F0_REGNUM ... S390_F15_REGNUM:
 130         get_freg(env, n - S390_F0_REGNUM)->ll = ldtul_p(mem_buf);
 131         return 8;
 132     default:
 133         return 0;
 134     }
 135 }
 136
 137 /* the values represent the positions in s390-vx.xml */
 138 #define S390_V0L_REGNUM 0
 139 #define S390_V15L_REGNUM 15
 140 #define S390_V16_REGNUM 16
 141 #define S390_V31_REGNUM 31
 142 /* total number of registers in s390-vx.xml */
 143 #define S390_NUM_VREGS 32
 144
 145 static int cpu_read_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
 146 {
 147     int ret;
 148
 149     switch (n) {
 150     case S390_V0L_REGNUM ... S390_V15L_REGNUM:
 151         ret = gdb_get_reg64(mem_buf, env->vregs[n][1].ll);
 152         break;
 153     case S390_V16_REGNUM ... S390_V31_REGNUM:
 154         ret = gdb_get_reg64(mem_buf, env->vregs[n][0].ll);
 155         ret += gdb_get_reg64(mem_buf + 8, env->vregs[n][1].ll);
 156         break;
 157     default:
 158         ret = 0;
 159     }
 160
 161     return ret;
 162 }
 163
 164 static int cpu_write_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
 165 {
 166     switch (n) {
 167     case S390_V0L_REGNUM ... S390_V15L_REGNUM:
 168         env->vregs[n][1].ll = ldtul_p(mem_buf + 8);
 169         return 8;
 170     case S390_V16_REGNUM ... S390_V31_REGNUM:
 171         env->vregs[n][0].ll = ldtul_p(mem_buf);
 172         env->vregs[n][1].ll = ldtul_p(mem_buf + 8);
 173         return 16;
 174     default:
 175         return 0;
 176     }
 177 }
 178
 179 /* the values represent the positions in s390-cr.xml */
 180 #define S390_C0_REGNUM 0
 181 #define S390_C15_REGNUM 15
 182 /* total number of registers in s390-cr.xml */
 183 #define S390_NUM_C_REGS 16
 184
 185 #ifndef CONFIG_USER_ONLY
 186 static int cpu_read_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 187 {
 188     switch (n) {
 189     case S390_C0_REGNUM ... S390_C15_REGNUM:
 190         return gdb_get_regl(mem_buf, env->cregs[n]);
 191     default:
 192         return 0;
 193     }
 194 }
 195
 196 static int cpu_write_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 197 {
 198     switch (n) {
 199     case S390_C0_REGNUM ... S390_C15_REGNUM:
 200         env->cregs[n] = ldtul_p(mem_buf);
 201         if (tcg_enabled()) {
 202             tlb_flush(ENV_GET_CPU(env), 1);
 203         }
 204         cpu_synchronize_post_init(ENV_GET_CPU(env));
 205         return 8;
 206     default:
 207         return 0;
 208     }
 209 }
 210
 211 /* the values represent the positions in s390-virt.xml */
 212 #define S390_VIRT_CKC_REGNUM    0
 213 #define S390_VIRT_CPUTM_REGNUM  1
 214 #define S390_VIRT_BEA_REGNUM    2
 215 #define S390_VIRT_PREFIX_REGNUM 3
 216 #define S390_VIRT_PP_REGNUM     4
 217 #define S390_VIRT_PFT_REGNUM    5
 218 #define S390_VIRT_PFS_REGNUM    6
 219 #define S390_VIRT_PFC_REGNUM    7
 220 /* total number of registers in s390-virt.xml */
 221 #define S390_NUM_VIRT_REGS 8
 222
 223 static int cpu_read_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 224 {
 225     switch (n) {
 226     case S390_VIRT_CKC_REGNUM:
 227         return gdb_get_regl(mem_buf, env->ckc);
 228     case S390_VIRT_CPUTM_REGNUM:
 229         return gdb_get_regl(mem_buf, env->cputm);
 230     case S390_VIRT_BEA_REGNUM:
 231         return gdb_get_regl(mem_buf, env->gbea);
 232     case S390_VIRT_PREFIX_REGNUM:
 233         return gdb_get_regl(mem_buf, env->psa);
 234     case S390_VIRT_PP_REGNUM:
 235         return gdb_get_regl(mem_buf, env->pp);
 236     case S390_VIRT_PFT_REGNUM:
 237         return gdb_get_regl(mem_buf, env->pfault_token);
 238     case S390_VIRT_PFS_REGNUM:
 239         return gdb_get_regl(mem_buf, env->pfault_select);
 240     case S390_VIRT_PFC_REGNUM:
 241         return gdb_get_regl(mem_buf, env->pfault_compare);
 242     default:
 243         return 0;
 244     }
 245 }
 246
 247 static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 248 {
 249     switch (n) {
 250     case S390_VIRT_CKC_REGNUM:
 251         env->ckc = ldtul_p(mem_buf);
 252         cpu_synchronize_post_init(ENV_GET_CPU(env));
 253         return 8;
 254     case S390_VIRT_CPUTM_REGNUM:
 255         env->cputm = ldtul_p(mem_buf);
 256         cpu_synchronize_post_init(ENV_GET_CPU(env));
 257         return 8;
 258     case S390_VIRT_BEA_REGNUM:
 259         env->gbea = ldtul_p(mem_buf);
 260         cpu_synchronize_post_init(ENV_GET_CPU(env));
 261         return 8;
 262     case S390_VIRT_PREFIX_REGNUM:
 263         env->psa = ldtul_p(mem_buf);
 264         cpu_synchronize_post_init(ENV_GET_CPU(env));
 265         return 8;
 266     case S390_VIRT_PP_REGNUM:
 267         env->pp = ldtul_p(mem_buf);
 268         cpu_synchronize_post_init(ENV_GET_CPU(env));
 269         return 8;
 270     case S390_VIRT_PFT_REGNUM:
 271         env->pfault_token = ldtul_p(mem_buf);
 272         cpu_synchronize_post_init(ENV_GET_CPU(env));
 273         return 8;
 274     case S390_VIRT_PFS_REGNUM:
 275         env->pfault_select = ldtul_p(mem_buf);
 276         cpu_synchronize_post_init(ENV_GET_CPU(env));
 277         return 8;
 278     case S390_VIRT_PFC_REGNUM:
 279         env->pfault_compare = ldtul_p(mem_buf);
 280         cpu_synchronize_post_init(ENV_GET_CPU(env));
 281         return 8;
 282     default:
 283         return 0;
 284     }
 285 }
 286 #endif
 287
 288 void s390_cpu_gdb_init(CPUState *cs)
 289 {
 290     gdb_register_coprocessor(cs, cpu_read_ac_reg,
 291                              cpu_write_ac_reg,
 292                              S390_NUM_AC_REGS, "s390-acr.xml", 0);
 293
 294     gdb_register_coprocessor(cs, cpu_read_fp_reg,
 295                              cpu_write_fp_reg,
 296                              S390_NUM_FP_REGS, "s390-fpr.xml", 0);
 297
 298     gdb_register_coprocessor(cs, cpu_read_vreg,
 299                              cpu_write_vreg,
 300                              S390_NUM_VREGS, "s390-vx.xml", 0);
 301
 302 #ifndef CONFIG_USER_ONLY
 303     gdb_register_coprocessor(cs, cpu_read_c_reg,
 304                              cpu_write_c_reg,
 305                              S390_NUM_C_REGS, "s390-cr.xml", 0);
 306
 307     if (kvm_enabled()) {
 308         gdb_register_coprocessor(cs, cpu_read_virt_reg,
 309                                  cpu_write_virt_reg,
 310                                  S390_NUM_VIRT_REGS, "s390-virt.xml", 0);
 311     }
 312 #endif
 313 }