target/sh4/gdbstub.c

   1 /*
   2  * SuperH 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/gdbstub.h"
  24
  25 /* Hint: Use "set architecture sh4" in GDB to see fpu registers */
  26 /* FIXME: We should use XML for this.  */
  27
  28 int superh_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
  29 {
  30     SuperHCPU *cpu = SUPERH_CPU(cs);
  31     CPUSH4State *env = &cpu->env;
  32
  33     switch (n) {
  34     case 0 ... 7:
  35         if ((env->sr & (1u << SR_MD)) && (env->sr & (1u << SR_RB))) {
  36             return gdb_get_regl(mem_buf, env->gregs[n + 16]);
  37         } else {
  38             return gdb_get_regl(mem_buf, env->gregs[n]);
  39         }
  40     case 8 ... 15:
  41         return gdb_get_regl(mem_buf, env->gregs[n]);
  42     case 16:
  43         return gdb_get_regl(mem_buf, env->pc);
  44     case 17:
  45         return gdb_get_regl(mem_buf, env->pr);
  46     case 18:
  47         return gdb_get_regl(mem_buf, env->gbr);
  48     case 19:
  49         return gdb_get_regl(mem_buf, env->vbr);
  50     case 20:
  51         return gdb_get_regl(mem_buf, env->mach);
  52     case 21:
  53         return gdb_get_regl(mem_buf, env->macl);
  54     case 22:
  55         return gdb_get_regl(mem_buf, cpu_read_sr(env));
  56     case 23:
  57         return gdb_get_regl(mem_buf, env->fpul);
  58     case 24:
  59         return gdb_get_regl(mem_buf, env->fpscr);
  60     case 25 ... 40:
  61         if (env->fpscr & FPSCR_FR) {
  62             stfl_p(mem_buf, env->fregs[n - 9]);
  63         } else {
  64             stfl_p(mem_buf, env->fregs[n - 25]);
  65         }
  66         return 4;
  67     case 41:
  68         return gdb_get_regl(mem_buf, env->ssr);
  69     case 42:
  70         return gdb_get_regl(mem_buf, env->spc);
  71     case 43 ... 50:
  72         return gdb_get_regl(mem_buf, env->gregs[n - 43]);
  73     case 51 ... 58:
  74         return gdb_get_regl(mem_buf, env->gregs[n - (51 - 16)]);
  75     }
  76
  77     return 0;
  78 }
  79
  80 int superh_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  81 {
  82     SuperHCPU *cpu = SUPERH_CPU(cs);
  83     CPUSH4State *env = &cpu->env;
  84
  85     switch (n) {
  86     case 0 ... 7:
  87         if ((env->sr & (1u << SR_MD)) && (env->sr & (1u << SR_RB))) {
  88             env->gregs[n + 16] = ldl_p(mem_buf);
  89         } else {
  90             env->gregs[n] = ldl_p(mem_buf);
  91         }
  92         break;
  93     case 8 ... 15:
  94         env->gregs[n] = ldl_p(mem_buf);
  95         break;
  96     case 16:
  97         env->pc = ldl_p(mem_buf);
  98         break;
  99     case 17:
 100         env->pr = ldl_p(mem_buf);
 101         break;
 102     case 18:
 103         env->gbr = ldl_p(mem_buf);
 104         break;
 105     case 19:
 106         env->vbr = ldl_p(mem_buf);
 107         break;
 108     case 20:
 109         env->mach = ldl_p(mem_buf);
 110         break;
 111     case 21:
 112         env->macl = ldl_p(mem_buf);
 113         break;
 114     case 22:
 115         cpu_write_sr(env, ldl_p(mem_buf));
 116         break;
 117     case 23:
 118         env->fpul = ldl_p(mem_buf);
 119         break;
 120     case 24:
 121         env->fpscr = ldl_p(mem_buf);
 122         break;
 123     case 25 ... 40:
 124         if (env->fpscr & FPSCR_FR) {
 125             env->fregs[n - 9] = ldfl_p(mem_buf);
 126         } else {
 127             env->fregs[n - 25] = ldfl_p(mem_buf);
 128         }
 129         break;
 130     case 41:
 131         env->ssr = ldl_p(mem_buf);
 132         break;
 133     case 42:
 134         env->spc = ldl_p(mem_buf);
 135         break;
 136     case 43 ... 50:
 137         env->gregs[n - 43] = ldl_p(mem_buf);
 138         break;
 139     case 51 ... 58:
 140         env->gregs[n - (51 - 16)] = ldl_p(mem_buf);
 141         break;
 142     default:
 143         return 0;
 144     }
 145
 146     return 4;
 147 }