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