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/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 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.h"
#include "user-internals.h"
#include "cpu_loop-common.h"
#include "signal-common.h"
void cpu_loop(CPUOpenRISCState *env)
{
CPUState *cs = env_cpu(env);
int trapnr;
abi_long ret;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_SYSCALL:
env->pc += 4; /* 0xc00; */
ret = do_syscall(env,
cpu_get_gpr(env, 11), /* return value */
cpu_get_gpr(env, 3), /* r3 - r7 are params */
cpu_get_gpr(env, 4),
cpu_get_gpr(env, 5),
cpu_get_gpr(env, 6),
cpu_get_gpr(env, 7),
cpu_get_gpr(env, 8), 0, 0);
if (ret == -QEMU_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -QEMU_ESIGRETURN) {
cpu_set_gpr(env, 11, ret);
}
break;
case EXCP_ALIGN:
force_sig_fault(TARGET_SIGBUS, TARGET_BUS_ADRALN, env->eear);
break;
case EXCP_ILLEGAL:
force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPC, env->pc);
break;
case EXCP_INTERRUPT:
/* We processed the pending cpu work above. */
break;
case EXCP_DEBUG:
force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc);
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
case EXCP_RANGE:
/* Requires SR.OVE set, which linux-user won't do. */
cpu_abort(cs, "Unexpected RANGE exception");
case EXCP_FPE:
/*
* Requires FPSCR.FPEE set. Writes to FPSCR from usermode not
* yet enabled in kernel ABI, so linux-user does not either.
*/
cpu_abort(cs, "Unexpected FPE exception");
default:
g_assert_not_reached();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for (i = 0; i < 32; i++) {
cpu_set_gpr(env, i, regs->gpr[i]);
}
env->pc = regs->pc;
cpu_set_sr(env, regs->sr);
}
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