mirror of https://gitee.com/openkylin/qemu.git
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
|
/*
|
||
|
* RISC-V GDB Server Stub
|
||
|
*
|
||
|
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
* under the terms and conditions of the GNU General Public License,
|
||
|
* version 2 or later, as published by the Free Software Foundation.
|
||
|
*
|
||
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||
|
* more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License along with
|
||
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
*/
|
||
|
|
||
|
#include "qemu/osdep.h"
|
||
|
#include "qemu-common.h"
|
||
|
#include "exec/gdbstub.h"
|
||
|
#include "cpu.h"
|
||
|
|
||
|
int riscv_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
|
||
|
{
|
||
|
RISCVCPU *cpu = RISCV_CPU(cs);
|
||
|
CPURISCVState *env = &cpu->env;
|
||
|
|
||
|
if (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 < 65) {
|
||
|
return gdb_get_reg64(mem_buf, env->fpr[n - 33]);
|
||
|
} else if (n < 4096 + 65) {
|
||
|
return gdb_get_regl(mem_buf, csr_read_helper(env, n - 65));
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int riscv_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
|
||
|
{
|
||
|
RISCVCPU *cpu = RISCV_CPU(cs);
|
||
|
CPURISCVState *env = &cpu->env;
|
||
|
|
||
|
if (n == 0) {
|
||
|
/* discard writes to x0 */
|
||
|
return sizeof(target_ulong);
|
||
|
} else if (n < 32) {
|
||
|
env->gpr[n] = ldtul_p(mem_buf);
|
||
|
return sizeof(target_ulong);
|
||
|
} else if (n == 32) {
|
||
|
env->pc = ldtul_p(mem_buf);
|
||
|
return sizeof(target_ulong);
|
||
|
} else if (n < 65) {
|
||
|
env->fpr[n - 33] = ldq_p(mem_buf); /* always 64-bit */
|
||
|
return sizeof(uint64_t);
|
||
|
} else if (n < 4096 + 65) {
|
||
|
csr_write_helper(env, ldtul_p(mem_buf), n - 65);
|
||
|
}
|
||
|
return 0;
|
||
|
}
|