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