4ea5fe997d
These inline helpers are all used by target specific code so move them out of the general header so we don't needlessly pollute the rest of the API with target specific stuff. Note we have to include cpu.h in semihosting as it was relying on a side effect before. Reviewed-by: Taylor Simpson <tsimpson@quicinc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20230302190846.2593720-21-alex.bennee@linaro.org> Message-Id: <20230303025805.625589-21-richard.henderson@linaro.org>
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/*
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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 "gdbstub/helpers.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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vaddr avr_cpu_gdb_adjust_breakpoint(CPUState *cpu, vaddr addr)
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{
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/*
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* This is due to some strange GDB behavior
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* Let's assume main has address 0x100:
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* b main - sets breakpoint at address 0x00000100 (code)
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* b *0x100 - sets breakpoint at address 0x00800100 (data)
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*
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* Force all breakpoints into code space.
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*/
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return addr % OFFSET_DATA;
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}
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