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