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/*
* OpenRISC 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 2.1 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 "qemu/osdep.h"
#include "cpu.h"
#include "exec/gdbstub.h"
int openrisc_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
{
OpenRISCCPU *cpu = OPENRISC_CPU(cs);
CPUOpenRISCState *env = &cpu->env;
if (n < 32) {
return gdb_get_reg32(mem_buf, cpu_get_gpr(env, n));
} else {
switch (n) {
case 32: /* PPC */
return gdb_get_reg32(mem_buf, env->ppc);
case 33: /* NPC (equals PC) */
return gdb_get_reg32(mem_buf, env->pc);
case 34: /* SR */
return gdb_get_reg32(mem_buf, cpu_get_sr(env));
default:
break;
}
}
return 0;
}
int openrisc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
{
OpenRISCCPU *cpu = OPENRISC_CPU(cs);
CPUClass *cc = CPU_GET_CLASS(cs);
CPUOpenRISCState *env = &cpu->env;
uint32_t tmp;
if (n > cc->gdb_num_core_regs) {
return 0;
}
tmp = ldl_p(mem_buf);
if (n < 32) {
cpu_set_gpr(env, n, tmp);
} else {
switch (n) {
case 32: /* PPC */
env->ppc = tmp;
break;
case 33: /* NPC (equals PC) */
/* If setting PC to something different,
also clear delayed branch status. */
if (env->pc != tmp) {
env->pc = tmp;
env->dflag = 0;
}
break;
case 34: /* SR */
cpu_set_sr(env, tmp);
break;
default:
break;
}
}
return 4;
}
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