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 2.1 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
  21 #include "qemu/osdep.h"
  22 #include "cpu.h"
  23 #include "internal.h"
  24 #include "exec/exec-all.h"
  25 #include "exec/gdbstub.h"
  26 #include "qemu/bitops.h"
  27 #include "sysemu/hw_accel.h"
  28 #include "sysemu/tcg.h"
  29
  30 int s390_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  31 {
  32     S390CPU *cpu = S390_CPU(cs);
  33     CPUS390XState *env = &cpu->env;
  34     uint64_t val;
  35     int cc_op;
  36
  37     switch (n) {
  38     case S390_PSWM_REGNUM:
  39         if (tcg_enabled()) {
  40             cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst,
  41                             env->cc_vr);
  42             val = deposit64(env->psw.mask, 44, 2, cc_op);
  43             return gdb_get_regl(mem_buf, val);
  44         }
  45         return gdb_get_regl(mem_buf, env->psw.mask);
  46     case S390_PSWA_REGNUM:
  47         return gdb_get_regl(mem_buf, env->psw.addr);
  48     case S390_R0_REGNUM ... S390_R15_REGNUM:
  49         return gdb_get_regl(mem_buf, env->regs[n - S390_R0_REGNUM]);
  50     }
  51     return 0;
  52 }
  53
  54 int s390_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  55 {
  56     S390CPU *cpu = S390_CPU(cs);
  57     CPUS390XState *env = &cpu->env;
  58     target_ulong tmpl = ldtul_p(mem_buf);
  59
  60     switch (n) {
  61     case S390_PSWM_REGNUM:
  62         env->psw.mask = tmpl;
  63         if (tcg_enabled()) {
  64             env->cc_op = extract64(tmpl, 44, 2);
  65         }
  66         break;
  67     case S390_PSWA_REGNUM:
  68         env->psw.addr = tmpl;
  69         break;
  70     case S390_R0_REGNUM ... S390_R15_REGNUM:
  71         env->regs[n - S390_R0_REGNUM] = tmpl;
  72         break;
  73     default:
  74         return 0;
  75     }
  76     return 8;
  77 }
  78
  79 /* the values represent the positions in s390-acr.xml */
  80 #define S390_A0_REGNUM 0
  81 #define S390_A15_REGNUM 15
  82 /* total number of registers in s390-acr.xml */
  83 #define S390_NUM_AC_REGS 16
  84
  85 static int cpu_read_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
  86 {
  87     switch (n) {
  88     case S390_A0_REGNUM ... S390_A15_REGNUM:
  89         return gdb_get_reg32(mem_buf, env->aregs[n]);
  90     default:
  91         return 0;
  92     }
  93 }
  94
  95 static int cpu_write_ac_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
  96 {
  97     switch (n) {
  98     case S390_A0_REGNUM ... S390_A15_REGNUM:
  99         env->aregs[n] = ldl_p(mem_buf);
 100         cpu_synchronize_post_init(env_cpu(env));
 101         return 4;
 102     default:
 103         return 0;
 104     }
 105 }
 106
 107 /* the values represent the positions in s390-fpr.xml */
 108 #define S390_FPC_REGNUM 0
 109 #define S390_F0_REGNUM 1
 110 #define S390_F15_REGNUM 16
 111 /* total number of registers in s390-fpr.xml */
 112 #define S390_NUM_FP_REGS 17
 113
 114 static int cpu_read_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 115 {
 116     switch (n) {
 117     case S390_FPC_REGNUM:
 118         return gdb_get_reg32(mem_buf, env->fpc);
 119     case S390_F0_REGNUM ... S390_F15_REGNUM:
 120         return gdb_get_reg64(mem_buf, *get_freg(env, n - S390_F0_REGNUM));
 121     default:
 122         return 0;
 123     }
 124 }
 125
 126 static int cpu_write_fp_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 127 {
 128     switch (n) {
 129     case S390_FPC_REGNUM:
 130         env->fpc = ldl_p(mem_buf);
 131         return 4;
 132     case S390_F0_REGNUM ... S390_F15_REGNUM:
 133         *get_freg(env, n - S390_F0_REGNUM) = ldtul_p(mem_buf);
 134         return 8;
 135     default:
 136         return 0;
 137     }
 138 }
 139
 140 /* the values represent the positions in s390-vx.xml */
 141 #define S390_V0L_REGNUM 0
 142 #define S390_V15L_REGNUM 15
 143 #define S390_V16_REGNUM 16
 144 #define S390_V31_REGNUM 31
 145 /* total number of registers in s390-vx.xml */
 146 #define S390_NUM_VREGS 32
 147
 148 static int cpu_read_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
 149 {
 150     int ret;
 151
 152     switch (n) {
 153     case S390_V0L_REGNUM ... S390_V15L_REGNUM:
 154         ret = gdb_get_reg64(mem_buf, env->vregs[n][1]);
 155         break;
 156     case S390_V16_REGNUM ... S390_V31_REGNUM:
 157         ret = gdb_get_reg64(mem_buf, env->vregs[n][0]);
 158         ret += gdb_get_reg64(mem_buf + 8, env->vregs[n][1]);
 159         break;
 160     default:
 161         ret = 0;
 162     }
 163
 164     return ret;
 165 }
 166
 167 static int cpu_write_vreg(CPUS390XState *env, uint8_t *mem_buf, int n)
 168 {
 169     switch (n) {
 170     case S390_V0L_REGNUM ... S390_V15L_REGNUM:
 171         env->vregs[n][1] = ldtul_p(mem_buf + 8);
 172         return 8;
 173     case S390_V16_REGNUM ... S390_V31_REGNUM:
 174         env->vregs[n][0] = ldtul_p(mem_buf);
 175         env->vregs[n][1] = ldtul_p(mem_buf + 8);
 176         return 16;
 177     default:
 178         return 0;
 179     }
 180 }
 181
 182 /* the values represent the positions in s390-cr.xml */
 183 #define S390_C0_REGNUM 0
 184 #define S390_C15_REGNUM 15
 185 /* total number of registers in s390-cr.xml */
 186 #define S390_NUM_C_REGS 16
 187
 188 #ifndef CONFIG_USER_ONLY
 189 static int cpu_read_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 190 {
 191     switch (n) {
 192     case S390_C0_REGNUM ... S390_C15_REGNUM:
 193         return gdb_get_regl(mem_buf, env->cregs[n]);
 194     default:
 195         return 0;
 196     }
 197 }
 198
 199 static int cpu_write_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 200 {
 201     switch (n) {
 202     case S390_C0_REGNUM ... S390_C15_REGNUM:
 203         env->cregs[n] = ldtul_p(mem_buf);
 204         if (tcg_enabled()) {
 205             tlb_flush(env_cpu(env));
 206         }
 207         cpu_synchronize_post_init(env_cpu(env));
 208         return 8;
 209     default:
 210         return 0;
 211     }
 212 }
 213
 214 /* the values represent the positions in s390-virt.xml */
 215 #define S390_VIRT_CKC_REGNUM    0
 216 #define S390_VIRT_CPUTM_REGNUM  1
 217 #define S390_VIRT_BEA_REGNUM    2
 218 #define S390_VIRT_PREFIX_REGNUM 3
 219 #define S390_VIRT_PP_REGNUM     4
 220 #define S390_VIRT_PFT_REGNUM    5
 221 #define S390_VIRT_PFS_REGNUM    6
 222 #define S390_VIRT_PFC_REGNUM    7
 223 /* total number of registers in s390-virt.xml */
 224 #define S390_NUM_VIRT_REGS 8
 225
 226 static int cpu_read_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 227 {
 228     switch (n) {
 229     case S390_VIRT_CKC_REGNUM:
 230         return gdb_get_regl(mem_buf, env->ckc);
 231     case S390_VIRT_CPUTM_REGNUM:
 232         return gdb_get_regl(mem_buf, env->cputm);
 233     case S390_VIRT_BEA_REGNUM:
 234         return gdb_get_regl(mem_buf, env->gbea);
 235     case S390_VIRT_PREFIX_REGNUM:
 236         return gdb_get_regl(mem_buf, env->psa);
 237     case S390_VIRT_PP_REGNUM:
 238         return gdb_get_regl(mem_buf, env->pp);
 239     case S390_VIRT_PFT_REGNUM:
 240         return gdb_get_regl(mem_buf, env->pfault_token);
 241     case S390_VIRT_PFS_REGNUM:
 242         return gdb_get_regl(mem_buf, env->pfault_select);
 243     case S390_VIRT_PFC_REGNUM:
 244         return gdb_get_regl(mem_buf, env->pfault_compare);
 245     default:
 246         return 0;
 247     }
 248 }
 249
 250 static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 251 {
 252     switch (n) {
 253     case S390_VIRT_CKC_REGNUM:
 254         env->ckc = ldtul_p(mem_buf);
 255         cpu_synchronize_post_init(env_cpu(env));
 256         return 8;
 257     case S390_VIRT_CPUTM_REGNUM:
 258         env->cputm = ldtul_p(mem_buf);
 259         cpu_synchronize_post_init(env_cpu(env));
 260         return 8;
 261     case S390_VIRT_BEA_REGNUM:
 262         env->gbea = ldtul_p(mem_buf);
 263         cpu_synchronize_post_init(env_cpu(env));
 264         return 8;
 265     case S390_VIRT_PREFIX_REGNUM:
 266         env->psa = ldtul_p(mem_buf);
 267         cpu_synchronize_post_init(env_cpu(env));
 268         return 8;
 269     case S390_VIRT_PP_REGNUM:
 270         env->pp = ldtul_p(mem_buf);
 271         cpu_synchronize_post_init(env_cpu(env));
 272         return 8;
 273     case S390_VIRT_PFT_REGNUM:
 274         env->pfault_token = ldtul_p(mem_buf);
 275         cpu_synchronize_post_init(env_cpu(env));
 276         return 8;
 277     case S390_VIRT_PFS_REGNUM:
 278         env->pfault_select = ldtul_p(mem_buf);
 279         cpu_synchronize_post_init(env_cpu(env));
 280         return 8;
 281     case S390_VIRT_PFC_REGNUM:
 282         env->pfault_compare = ldtul_p(mem_buf);
 283         cpu_synchronize_post_init(env_cpu(env));
 284         return 8;
 285     default:
 286         return 0;
 287     }
 288 }
 289 #endif
 290
 291 /* the values represent the positions in s390-gs.xml */
 292 #define S390_GS_RESERVED_REGNUM 0
 293 #define S390_GS_GSD_REGNUM      1
 294 #define S390_GS_GSSM_REGNUM     2
 295 #define S390_GS_GSEPLA_REGNUM   3
 296 /* total number of registers in s390-gs.xml */
 297 #define S390_NUM_GS_REGS 4
 298
 299 static int cpu_read_gs_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 300 {
 301     return gdb_get_regl(mem_buf, env->gscb[n]);
 302 }
 303
 304 static int cpu_write_gs_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 305 {
 306     env->gscb[n] = ldtul_p(mem_buf);
 307     cpu_synchronize_post_init(env_cpu(env));
 308     return 8;
 309 }
 310
 311 void s390_cpu_gdb_init(CPUState *cs)
 312 {
 313     gdb_register_coprocessor(cs, cpu_read_ac_reg,
 314                              cpu_write_ac_reg,
 315                              S390_NUM_AC_REGS, "s390-acr.xml", 0);
 316
 317     gdb_register_coprocessor(cs, cpu_read_fp_reg,
 318                              cpu_write_fp_reg,
 319                              S390_NUM_FP_REGS, "s390-fpr.xml", 0);
 320
 321     gdb_register_coprocessor(cs, cpu_read_vreg,
 322                              cpu_write_vreg,
 323                              S390_NUM_VREGS, "s390-vx.xml", 0);
 324
 325     gdb_register_coprocessor(cs, cpu_read_gs_reg,
 326                              cpu_write_gs_reg,
 327                              S390_NUM_GS_REGS, "s390-gs.xml", 0);
 328
 329 #ifndef CONFIG_USER_ONLY
 330     gdb_register_coprocessor(cs, cpu_read_c_reg,
 331                              cpu_write_c_reg,
 332                              S390_NUM_C_REGS, "s390-cr.xml", 0);
 333
 334     if (kvm_enabled()) {
 335         gdb_register_coprocessor(cs, cpu_read_virt_reg,
 336                                  cpu_write_virt_reg,
 337                                  S390_NUM_VIRT_REGS, "s390-virt.xml", 0);
 338     }
 339 #endif
 340 }