qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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gdbstub.c (3209B)

      1 /*
      2  * CRIS 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 crisv10_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
     25 {
     26     CRISCPU *cpu = CRIS_CPU(cs);
     27     CPUCRISState *env = &cpu->env;
     28 
     29     if (n < 15) {
     30         return gdb_get_reg32(mem_buf, env->regs[n]);
     31     }
     32 
     33     if (n == 15) {
     34         return gdb_get_reg32(mem_buf, env->pc);
     35     }
     36 
     37     if (n < 32) {
     38         switch (n) {
     39         case 16:
     40             return gdb_get_reg8(mem_buf, env->pregs[n - 16]);
     41         case 17:
     42             return gdb_get_reg8(mem_buf, env->pregs[n - 16]);
     43         case 20:
     44         case 21:
     45             return gdb_get_reg16(mem_buf, env->pregs[n - 16]);
     46         default:
     47             if (n >= 23) {
     48                 return gdb_get_reg32(mem_buf, env->pregs[n - 16]);
     49             }
     50             break;
     51         }
     52     }
     53     return 0;
     54 }
     55 
     56 int cris_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
     57 {
     58     CRISCPU *cpu = CRIS_CPU(cs);
     59     CPUCRISState *env = &cpu->env;
     60     uint8_t srs;
     61 
     62     srs = env->pregs[PR_SRS];
     63     if (n < 16) {
     64         return gdb_get_reg32(mem_buf, env->regs[n]);
     65     }
     66 
     67     if (n >= 21 && n < 32) {
     68         return gdb_get_reg32(mem_buf, env->pregs[n - 16]);
     69     }
     70     if (n >= 33 && n < 49) {
     71         return gdb_get_reg32(mem_buf, env->sregs[srs][n - 33]);
     72     }
     73     switch (n) {
     74     case 16:
     75         return gdb_get_reg8(mem_buf, env->pregs[0]);
     76     case 17:
     77         return gdb_get_reg8(mem_buf, env->pregs[1]);
     78     case 18:
     79         return gdb_get_reg32(mem_buf, env->pregs[2]);
     80     case 19:
     81         return gdb_get_reg8(mem_buf, srs);
     82     case 20:
     83         return gdb_get_reg16(mem_buf, env->pregs[4]);
     84     case 32:
     85         return gdb_get_reg32(mem_buf, env->pc);
     86     }
     87 
     88     return 0;
     89 }
     90 
     91 int cris_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
     92 {
     93     CRISCPU *cpu = CRIS_CPU(cs);
     94     CPUCRISState *env = &cpu->env;
     95     uint32_t tmp;
     96 
     97     if (n > 49) {
     98         return 0;
     99     }
    100 
    101     tmp = ldl_p(mem_buf);
    102 
    103     if (n < 16) {
    104         env->regs[n] = tmp;
    105     }
    106 
    107     if (n >= 21 && n < 32) {
    108         env->pregs[n - 16] = tmp;
    109     }
    110 
    111     /* FIXME: Should support function regs be writable?  */
    112     switch (n) {
    113     case 16:
    114         return 1;
    115     case 17:
    116         return 1;
    117     case 18:
    118         env->pregs[PR_PID] = tmp;
    119         break;
    120     case 19:
    121         return 1;
    122     case 20:
    123         return 2;
    124     case 32:
    125         env->pc = tmp;
    126         break;
    127     }
    128 
    129     return 4;
    130 }