qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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gdbstub.c (2212B)

      1 /*
      2  * m68k 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 "exec/gdbstub.h"
     23 
     24 int m68k_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
     25 {
     26     M68kCPU *cpu = M68K_CPU(cs);
     27     CPUM68KState *env = &cpu->env;
     28 
     29     if (n < 8) {
     30         /* D0-D7 */
     31         return gdb_get_reg32(mem_buf, env->dregs[n]);
     32     } else if (n < 16) {
     33         /* A0-A7 */
     34         return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
     35     } else {
     36         switch (n) {
     37         case 16:
     38             /* SR is made of SR+CCR, CCR is many 1bit flags so uses helper */
     39             return gdb_get_reg32(mem_buf, env->sr | cpu_m68k_get_ccr(env));
     40         case 17:
     41             return gdb_get_reg32(mem_buf, env->pc);
     42         }
     43     }
     44     /*
     45      * FP registers not included here because they vary between
     46      * ColdFire and m68k.  Use XML bits for these.
     47      */
     48     return 0;
     49 }
     50 
     51 int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
     52 {
     53     M68kCPU *cpu = M68K_CPU(cs);
     54     CPUM68KState *env = &cpu->env;
     55     uint32_t tmp;
     56 
     57     tmp = ldl_p(mem_buf);
     58 
     59     if (n < 8) {
     60         /* D0-D7 */
     61         env->dregs[n] = tmp;
     62     } else if (n < 16) {
     63         /* A0-A7 */
     64         env->aregs[n - 8] = tmp;
     65     } else {
     66         switch (n) {
     67         case 16:
     68             cpu_m68k_set_sr(env, tmp);
     69             break;
     70         case 17:
     71             env->pc = tmp;
     72             break;
     73         default:
     74             return 0;
     75         }
     76     }
     77     return 4;
     78 }