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     RXCPU *cpu = RX_CPU(cs);
  25     CPURXState *env = &cpu->env;
  26
  27     switch (n) {
  28     case 0 ... 15:
  29         return gdb_get_regl(mem_buf, env->regs[n]);
  30     case 16:
  31         return gdb_get_regl(mem_buf, (env->psw_u) ? env->regs[0] : env->usp);
  32     case 17:
  33         return gdb_get_regl(mem_buf, (!env->psw_u) ? env->regs[0] : env->isp);
  34     case 18:
  35         return gdb_get_regl(mem_buf, rx_cpu_pack_psw(env));
  36     case 19:
  37         return gdb_get_regl(mem_buf, env->pc);
  38     case 20:
  39         return gdb_get_regl(mem_buf, env->intb);
  40     case 21:
  41         return gdb_get_regl(mem_buf, env->bpsw);
  42     case 22:
  43         return gdb_get_regl(mem_buf, env->bpc);
  44     case 23:
  45         return gdb_get_regl(mem_buf, env->fintv);
  46     case 24:
  47         return gdb_get_regl(mem_buf, env->fpsw);
  48     case 25:
  49         return 0;
  50     }
  51     return 0;
  52 }
  53
  54 int rx_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  55 {
  56     RXCPU *cpu = RX_CPU(cs);
  57     CPURXState *env = &cpu->env;
  58     uint32_t psw;
  59     switch (n) {
  60     case 0 ... 15:
  61         env->regs[n] = ldl_p(mem_buf);
  62         if (n == 0) {
  63             if (env->psw_u) {
  64                 env->usp = env->regs[0];
  65             } else {
  66                 env->isp = env->regs[0];
  67             }
  68         }
  69         break;
  70     case 16:
  71         env->usp = ldl_p(mem_buf);
  72         if (env->psw_u) {
  73             env->regs[0] = ldl_p(mem_buf);
  74         }
  75         break;
  76     case 17:
  77         env->isp = ldl_p(mem_buf);
  78         if (!env->psw_u) {
  79             env->regs[0] = ldl_p(mem_buf);
  80         }
  81         break;
  82     case 18:
  83         psw = ldl_p(mem_buf);
  84         rx_cpu_unpack_psw(env, psw, 1);
  85         break;
  86     case 19:
  87         env->pc = ldl_p(mem_buf);
  88         break;
  89     case 20:
  90         env->intb = ldl_p(mem_buf);
  91         break;
  92     case 21:
  93         env->bpsw = ldl_p(mem_buf);
  94         break;
  95     case 22:
  96         env->bpc = ldl_p(mem_buf);
  97         break;
  98     case 23:
  99         env->fintv = ldl_p(mem_buf);
 100         break;
 101     case 24:
 102         env->fpsw = ldl_p(mem_buf);
 103         break;
 104     case 25:
 105         return 8;
 106     default:
 107         return 0;
 108     }
 109
 110     return 4;
 111 }