82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
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* LOONGARCH gdb server stub
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*
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* Copyright (c) 2021 Loongson Technology Corporation Limited
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "internals.h"
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#include "exec/gdbstub.h"
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int loongarch_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
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{
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LoongArchCPU *cpu = LOONGARCH_CPU(cs);
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CPULoongArchState *env = &cpu->env;
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if (0 <= n && n < 32) {
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return gdb_get_regl(mem_buf, env->gpr[n]);
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} else if (n == 32) {
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return gdb_get_regl(mem_buf, env->pc);
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} else if (n == 33) {
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return gdb_get_regl(mem_buf, env->badaddr);
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}
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return 0;
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}
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int loongarch_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
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{
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LoongArchCPU *cpu = LOONGARCH_CPU(cs);
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CPULoongArchState *env = &cpu->env;
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target_ulong tmp = ldtul_p(mem_buf);
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int length = 0;
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if (0 <= n && n < 32) {
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env->gpr[n] = tmp;
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length = sizeof(target_ulong);
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} else if (n == 32) {
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env->pc = tmp;
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length = sizeof(target_ulong);
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}
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return length;
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}
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static int loongarch_gdb_get_fpu(CPULoongArchState *env,
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GByteArray *mem_buf, int n)
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{
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if (0 <= n && n < 32) {
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return gdb_get_reg64(mem_buf, env->fpr[n]);
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} else if (32 <= n && n < 40) {
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return gdb_get_reg8(mem_buf, env->cf[n - 32]);
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} else if (n == 40) {
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return gdb_get_reg32(mem_buf, env->fcsr0);
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}
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return 0;
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}
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static int loongarch_gdb_set_fpu(CPULoongArchState *env,
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uint8_t *mem_buf, int n)
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{
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int length = 0;
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if (0 <= n && n < 32) {
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env->fpr[n] = ldq_p(mem_buf);
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length = 8;
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} else if (32 <= n && n < 40) {
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env->cf[n - 32] = ldub_p(mem_buf);
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length = 1;
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} else if (n == 40) {
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env->fcsr0 = ldl_p(mem_buf);
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length = 4;
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}
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return length;
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}
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void loongarch_cpu_register_gdb_regs_for_features(CPUState *cs)
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{
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gdb_register_coprocessor(cs, loongarch_gdb_get_fpu, loongarch_gdb_set_fpu,
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41, "loongarch-fpu64.xml", 0);
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}
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