85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
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/*
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* QEMU AVR gdbstub
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*
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* Copyright (c) 2016-2020 Michael Rolnik
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see
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* <http://www.gnu.org/licenses/lgpl-2.1.html>
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*/
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#include "qemu/osdep.h"
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#include "exec/gdbstub.h"
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int avr_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
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{
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AVRCPU *cpu = AVR_CPU(cs);
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CPUAVRState *env = &cpu->env;
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/* R */
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if (n < 32) {
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return gdb_get_reg8(mem_buf, env->r[n]);
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}
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/* SREG */
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if (n == 32) {
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uint8_t sreg = cpu_get_sreg(env);
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return gdb_get_reg8(mem_buf, sreg);
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}
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/* SP */
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if (n == 33) {
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return gdb_get_reg16(mem_buf, env->sp & 0x0000ffff);
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}
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/* PC */
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if (n == 34) {
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return gdb_get_reg32(mem_buf, env->pc_w * 2);
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}
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return 0;
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}
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int avr_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
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{
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AVRCPU *cpu = AVR_CPU(cs);
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CPUAVRState *env = &cpu->env;
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/* R */
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if (n < 32) {
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env->r[n] = *mem_buf;
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return 1;
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}
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/* SREG */
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if (n == 32) {
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cpu_set_sreg(env, *mem_buf);
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return 1;
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}
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/* SP */
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if (n == 33) {
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env->sp = lduw_p(mem_buf);
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return 2;
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}
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/* PC */
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if (n == 34) {
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env->pc_w = ldl_p(mem_buf) / 2;
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return 4;
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}
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return 0;
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}
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