target/rx/gdbstub.c

   1 /*
   2  * RX gdb server stub
   3  *
   4  * Copyright (c) 2019 Yoshinori Sato
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2 or later, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 #include "qemu/osdep.h"
  19 #include "qemu-common.h"
  20 #include "cpu.h"
  21 #include "exec/gdbstub.h"
  22
  23 int rx_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
  24 {
  25     RXCPU *cpu = RXCPU(cs);
  26     CPURXState *env = &cpu->env;
  27
  28     switch (n) {
  29     case 0 ... 15:
  30         return gdb_get_regl(mem_buf, env->regs[n]);
  31     case 16:
  32         return gdb_get_regl(mem_buf, (env->psw_u) ? env->regs[0] : env->usp);
  33     case 17:
  34         return gdb_get_regl(mem_buf, (!env->psw_u) ? env->regs[0] : env->isp);
  35     case 18:
  36         return gdb_get_regl(mem_buf, rx_cpu_pack_psw(env));
  37     case 19:
  38         return gdb_get_regl(mem_buf, env->pc);
  39     case 20:
  40         return gdb_get_regl(mem_buf, env->intb);
  41     case 21:
  42         return gdb_get_regl(mem_buf, env->bpsw);
  43     case 22:
  44         return gdb_get_regl(mem_buf, env->bpc);
  45     case 23:
  46         return gdb_get_regl(mem_buf, env->fintv);
  47     case 24:
  48         return gdb_get_regl(mem_buf, env->fpsw);
  49     case 25:
  50         return 0;
  51     }
  52     return 0;
  53 }
  54
  55 int rx_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  56 {
  57     RXCPU *cpu = RXCPU(cs);
  58     CPURXState *env = &cpu->env;
  59     uint32_t psw;
  60     switch (n) {
  61     case 0 ... 15:
  62         env->regs[n] = ldl_p(mem_buf);
  63         if (n == 0) {
  64             if (env->psw_u) {
  65                 env->usp = env->regs[0];
  66             } else {
  67                 env->isp = env->regs[0];
  68             }
  69         }
  70         break;
  71     case 16:
  72         env->usp = ldl_p(mem_buf);
  73         if (env->psw_u) {
  74             env->regs[0] = ldl_p(mem_buf);
  75         }
  76         break;
  77     case 17:
  78         env->isp = ldl_p(mem_buf);
  79         if (!env->psw_u) {
  80             env->regs[0] = ldl_p(mem_buf);
  81         }
  82         break;
  83     case 18:
  84         psw = ldl_p(mem_buf);
  85         rx_cpu_unpack_psw(env, psw, 1);
  86         break;
  87     case 19:
  88         env->pc = ldl_p(mem_buf);
  89         break;
  90     case 20:
  91         env->intb = ldl_p(mem_buf);
  92         break;
  93     case 21:
  94         env->bpsw = ldl_p(mem_buf);
  95         break;
  96     case 22:
  97         env->bpc = ldl_p(mem_buf);
  98         break;
  99     case 23:
 100         env->fintv = ldl_p(mem_buf);
 101         break;
 102     case 24:
 103         env->fpsw = ldl_p(mem_buf);
 104         break;
 105     case 25:
 106         return 8;
 107     default:
 108         return 0;
 109     }
 110
 111     return 4;
 112 }