92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* qemu user cpu loop
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu.h"
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#include "user-internals.h"
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#include "cpu_loop-common.h"
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#include "signal-common.h"
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void cpu_loop(CPUSH4State *env)
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{
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CPUState *cs = env_cpu(env);
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int trapnr, ret;
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while (1) {
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bool arch_interrupt = true;
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cpu_exec_start(cs);
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trapnr = cpu_exec(cs);
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cpu_exec_end(cs);
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process_queued_cpu_work(cs);
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switch (trapnr) {
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case 0x160:
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env->pc += 2;
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ret = do_syscall(env,
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env->gregs[3],
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env->gregs[4],
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env->gregs[5],
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env->gregs[6],
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env->gregs[7],
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env->gregs[0],
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env->gregs[1],
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0, 0);
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if (ret == -QEMU_ERESTARTSYS) {
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env->pc -= 2;
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} else if (ret != -QEMU_ESIGRETURN) {
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env->gregs[0] = ret;
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}
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break;
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case EXCP_INTERRUPT:
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/* just indicate that signals should be handled asap */
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break;
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case EXCP_DEBUG:
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force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc);
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break;
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case EXCP_ATOMIC:
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cpu_exec_step_atomic(cs);
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arch_interrupt = false;
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break;
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default:
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fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
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cpu_dump_state(cs, stderr, 0);
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exit(EXIT_FAILURE);
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}
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process_pending_signals (env);
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/* Most of the traps imply an exception or interrupt, which
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implies an REI instruction has been executed. Which means
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that LDST (aka LOK_ADDR) should be cleared. But there are
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a few exceptions for traps internal to QEMU. */
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if (arch_interrupt) {
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env->lock_addr = -1;
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}
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}
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}
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void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
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{
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int i;
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for(i = 0; i < 16; i++) {
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env->gregs[i] = regs->regs[i];
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}
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env->pc = regs->pc;
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}
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