186f19cf46
The AVR architecture uses little endianness. Directly use
the little-endian LD/ST API.
Mechanical change using:
$ end=le; \
for acc in uw w l q tul; do \
sed -i -e "s/ld${acc}_p(/ld${acc}_${end}_p(/" \
-e "s/st${acc}_p(/st${acc}_${end}_p(/" \
$(git grep -wlE '(ld|st)t?u?[wlq]_p' target/avr/); \
done
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241004163042.85922-11-philmd@linaro.org>
97 lines
2.2 KiB
C
97 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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#include "cpu.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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CPUAVRState *env = cpu_env(cs);
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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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CPUAVRState *env = cpu_env(cs);
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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_le_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_le_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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