110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/*
|
|
* Xtensa gdb server stub
|
|
*
|
|
* Copyright (c) 2003-2005 Fabrice Bellard
|
|
* Copyright (c) 2013 SUSE LINUX Products GmbH
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "config.h"
|
|
#include "qemu-common.h"
|
|
#include "exec/gdbstub.h"
|
|
|
|
int xtensa_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
|
|
{
|
|
XtensaCPU *cpu = XTENSA_CPU(cs);
|
|
CPUXtensaState *env = &cpu->env;
|
|
const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
|
|
|
|
if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
|
|
return 0;
|
|
}
|
|
|
|
switch (reg->type) {
|
|
case 9: /*pc*/
|
|
return gdb_get_reg32(mem_buf, env->pc);
|
|
|
|
case 1: /*ar*/
|
|
xtensa_sync_phys_from_window(env);
|
|
return gdb_get_reg32(mem_buf, env->phys_regs[(reg->targno & 0xff)
|
|
% env->config->nareg]);
|
|
|
|
case 2: /*SR*/
|
|
return gdb_get_reg32(mem_buf, env->sregs[reg->targno & 0xff]);
|
|
|
|
case 3: /*UR*/
|
|
return gdb_get_reg32(mem_buf, env->uregs[reg->targno & 0xff]);
|
|
|
|
case 4: /*f*/
|
|
return gdb_get_reg32(mem_buf, float32_val(env->fregs[reg->targno
|
|
& 0x0f]));
|
|
|
|
case 8: /*a*/
|
|
return gdb_get_reg32(mem_buf, env->regs[reg->targno & 0x0f]);
|
|
|
|
default:
|
|
qemu_log("%s from reg %d of unsupported type %d\n",
|
|
__func__, n, reg->type);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int xtensa_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
|
|
{
|
|
XtensaCPU *cpu = XTENSA_CPU(cs);
|
|
CPUXtensaState *env = &cpu->env;
|
|
uint32_t tmp;
|
|
const XtensaGdbReg *reg = env->config->gdb_regmap.reg + n;
|
|
|
|
if (n < 0 || n >= env->config->gdb_regmap.num_regs) {
|
|
return 0;
|
|
}
|
|
|
|
tmp = ldl_p(mem_buf);
|
|
|
|
switch (reg->type) {
|
|
case 9: /*pc*/
|
|
env->pc = tmp;
|
|
break;
|
|
|
|
case 1: /*ar*/
|
|
env->phys_regs[(reg->targno & 0xff) % env->config->nareg] = tmp;
|
|
xtensa_sync_window_from_phys(env);
|
|
break;
|
|
|
|
case 2: /*SR*/
|
|
env->sregs[reg->targno & 0xff] = tmp;
|
|
break;
|
|
|
|
case 3: /*UR*/
|
|
env->uregs[reg->targno & 0xff] = tmp;
|
|
break;
|
|
|
|
case 4: /*f*/
|
|
env->fregs[reg->targno & 0x0f] = make_float32(tmp);
|
|
break;
|
|
|
|
case 8: /*a*/
|
|
env->regs[reg->targno & 0x0f] = tmp;
|
|
break;
|
|
|
|
default:
|
|
qemu_log("%s to reg %d of unsupported type %d\n",
|
|
__func__, n, reg->type);
|
|
return 0;
|
|
}
|
|
|
|
return 4;
|
|
}
|