e64cb6c231
Ensure at registration that all breakpoints are in code space, not data space. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/*
|
|
* QEMU AVR gdbstub
|
|
*
|
|
* Copyright (c) 2016-2020 Michael Rolnik
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see
|
|
* <http://www.gnu.org/licenses/lgpl-2.1.html>
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "exec/gdbstub.h"
|
|
|
|
int avr_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
|
|
{
|
|
AVRCPU *cpu = AVR_CPU(cs);
|
|
CPUAVRState *env = &cpu->env;
|
|
|
|
/* R */
|
|
if (n < 32) {
|
|
return gdb_get_reg8(mem_buf, env->r[n]);
|
|
}
|
|
|
|
/* SREG */
|
|
if (n == 32) {
|
|
uint8_t sreg = cpu_get_sreg(env);
|
|
|
|
return gdb_get_reg8(mem_buf, sreg);
|
|
}
|
|
|
|
/* SP */
|
|
if (n == 33) {
|
|
return gdb_get_reg16(mem_buf, env->sp & 0x0000ffff);
|
|
}
|
|
|
|
/* PC */
|
|
if (n == 34) {
|
|
return gdb_get_reg32(mem_buf, env->pc_w * 2);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int avr_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
|
|
{
|
|
AVRCPU *cpu = AVR_CPU(cs);
|
|
CPUAVRState *env = &cpu->env;
|
|
|
|
/* R */
|
|
if (n < 32) {
|
|
env->r[n] = *mem_buf;
|
|
return 1;
|
|
}
|
|
|
|
/* SREG */
|
|
if (n == 32) {
|
|
cpu_set_sreg(env, *mem_buf);
|
|
return 1;
|
|
}
|
|
|
|
/* SP */
|
|
if (n == 33) {
|
|
env->sp = lduw_p(mem_buf);
|
|
return 2;
|
|
}
|
|
|
|
/* PC */
|
|
if (n == 34) {
|
|
env->pc_w = ldl_p(mem_buf) / 2;
|
|
return 4;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
vaddr avr_cpu_gdb_adjust_breakpoint(CPUState *cpu, vaddr addr)
|
|
{
|
|
/*
|
|
* This is due to some strange GDB behavior
|
|
* Let's assume main has address 0x100:
|
|
* b main - sets breakpoint at address 0x00000100 (code)
|
|
* b *0x100 - sets breakpoint at address 0x00800100 (data)
|
|
*
|
|
* Force all breakpoints into code space.
|
|
*/
|
|
return addr % OFFSET_DATA;
|
|
}
|