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 "cpu.h"
  20 #include "gdbstub/helpers.h"
  21
  22 int rx_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
  23 {
  24     CPURXState *env = cpu_env(cs);
  25
  26     switch (n) {
  27     case 0 ... 15:
  28         return gdb_get_regl(mem_buf, env->regs[n]);
  29     case 16:
  30         return gdb_get_regl(mem_buf, (env->psw_u) ? env->regs[0] : env->usp);
  31     case 17:
  32         return gdb_get_regl(mem_buf, (!env->psw_u) ? env->regs[0] : env->isp);
  33     case 18:
  34         return gdb_get_regl(mem_buf, rx_cpu_pack_psw(env));
  35     case 19:
  36         return gdb_get_regl(mem_buf, env->pc);
  37     case 20:
  38         return gdb_get_regl(mem_buf, env->intb);
  39     case 21:
  40         return gdb_get_regl(mem_buf, env->bpsw);
  41     case 22:
  42         return gdb_get_regl(mem_buf, env->bpc);
  43     case 23:
  44         return gdb_get_regl(mem_buf, env->fintv);
  45     case 24:
  46         return gdb_get_regl(mem_buf, env->fpsw);
  47     case 25:
  48         return 0;
  49     }
  50     return 0;
  51 }
  52
  53 int rx_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  54 {
  55     CPURXState *env = cpu_env(cs);
  56     uint32_t psw;
  57     switch (n) {
  58     case 0 ... 15:
  59         env->regs[n] = ldl_p(mem_buf);
  60         if (n == 0) {
  61             if (env->psw_u) {
  62                 env->usp = env->regs[0];
  63             } else {
  64                 env->isp = env->regs[0];
  65             }
  66         }
  67         break;
  68     case 16:
  69         env->usp = ldl_p(mem_buf);
  70         if (env->psw_u) {
  71             env->regs[0] = ldl_p(mem_buf);
  72         }
  73         break;
  74     case 17:
  75         env->isp = ldl_p(mem_buf);
  76         if (!env->psw_u) {
  77             env->regs[0] = ldl_p(mem_buf);
  78         }
  79         break;
  80     case 18:
  81         psw = ldl_p(mem_buf);
  82         rx_cpu_unpack_psw(env, psw, 1);
  83         break;
  84     case 19:
  85         env->pc = ldl_p(mem_buf);
  86         break;
  87     case 20:
  88         env->intb = ldl_p(mem_buf);
  89         break;
  90     case 21:
  91         env->bpsw = ldl_p(mem_buf);
  92         break;
  93     case 22:
  94         env->bpc = ldl_p(mem_buf);
  95         break;
  96     case 23:
  97         env->fintv = ldl_p(mem_buf);
  98         break;
  99     case 24:
 100         env->fpsw = ldl_p(mem_buf);
 101         break;
 102     case 25:
 103         return 8;
 104     default:
 105         return 0;
 106     }
 107
 108     return 4;
 109 }