qemu

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/*
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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(CPUCRISState *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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        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 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_BREAK:
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            ret = do_syscall(env, 
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                             env->regs[9], 
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                             env->regs[10], 
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                             env->regs[11], 
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                             env->regs[12], 
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                             env->regs[13], 
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                             env->pregs[7], 
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                             env->pregs[11],
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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->regs[10] = ret;
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            }
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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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            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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    }
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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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    CPUState *cpu = env_cpu(env);
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    TaskState *ts = get_task_state(cpu);
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    struct image_info *info = ts->info;
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    env->regs[0] = regs->r0;
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    env->regs[1] = regs->r1;
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    env->regs[2] = regs->r2;
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    env->regs[3] = regs->r3;
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    env->regs[4] = regs->r4;
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    env->regs[5] = regs->r5;
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    env->regs[6] = regs->r6;
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    env->regs[7] = regs->r7;
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    env->regs[8] = regs->r8;
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    env->regs[9] = regs->r9;
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    env->regs[10] = regs->r10;
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    env->regs[11] = regs->r11;
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    env->regs[12] = regs->r12;
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    env->regs[13] = regs->r13;
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    env->regs[14] = info->start_stack;
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    env->regs[15] = regs->acr;
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    env->pc = regs->erp;
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}
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