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 2.1 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 "cpu.h"
  22 #include "gdbstub/helpers.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, GByteArray *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             return gdb_get_reg32(mem_buf, env->fregs[n - 9]);
  62         }
  63         return gdb_get_reg32(mem_buf, env->fregs[n - 25]);
  64     case 41:
  65         return gdb_get_regl(mem_buf, env->ssr);
  66     case 42:
  67         return gdb_get_regl(mem_buf, env->spc);
  68     case 43 ... 50:
  69         return gdb_get_regl(mem_buf, env->gregs[n - 43]);
  70     case 51 ... 58:
  71         return gdb_get_regl(mem_buf, env->gregs[n - (51 - 16)]);
  72     }
  73
  74     return 0;
  75 }
  76
  77 int superh_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  78 {
  79     SuperHCPU *cpu = SUPERH_CPU(cs);
  80     CPUSH4State *env = &cpu->env;
  81
  82     switch (n) {
  83     case 0 ... 7:
  84         if ((env->sr & (1u << SR_MD)) && (env->sr & (1u << SR_RB))) {
  85             env->gregs[n + 16] = ldl_p(mem_buf);
  86         } else {
  87             env->gregs[n] = ldl_p(mem_buf);
  88         }
  89         break;
  90     case 8 ... 15:
  91         env->gregs[n] = ldl_p(mem_buf);
  92         break;
  93     case 16:
  94         env->pc = ldl_p(mem_buf);
  95         break;
  96     case 17:
  97         env->pr = ldl_p(mem_buf);
  98         break;
  99     case 18:
 100         env->gbr = ldl_p(mem_buf);
 101         break;
 102     case 19:
 103         env->vbr = ldl_p(mem_buf);
 104         break;
 105     case 20:
 106         env->mach = ldl_p(mem_buf);
 107         break;
 108     case 21:
 109         env->macl = ldl_p(mem_buf);
 110         break;
 111     case 22:
 112         cpu_write_sr(env, ldl_p(mem_buf));
 113         break;
 114     case 23:
 115         env->fpul = ldl_p(mem_buf);
 116         break;
 117     case 24:
 118         env->fpscr = ldl_p(mem_buf);
 119         break;
 120     case 25 ... 40:
 121         if (env->fpscr & FPSCR_FR) {
 122             env->fregs[n - 9] = ldl_p(mem_buf);
 123         } else {
 124             env->fregs[n - 25] = ldl_p(mem_buf);
 125         }
 126         break;
 127     case 41:
 128         env->ssr = ldl_p(mem_buf);
 129         break;
 130     case 42:
 131         env->spc = ldl_p(mem_buf);
 132         break;
 133     case 43 ... 50:
 134         env->gregs[n - 43] = ldl_p(mem_buf);
 135         break;
 136     case 51 ... 58:
 137         env->gregs[n - (51 - 16)] = ldl_p(mem_buf);
 138         break;
 139     default:
 140         return 0;
 141     }
 142
 143     return 4;
 144 }