LXR qemu/linux-user/cris/cpu

   1/*
   2 *  qemu user cpu loop
   3 *
   4 *  Copyright (c) 2003-2008 Fabrice Bellard
   5 *
   6 *  This program is free software; you can redistribute it and/or modify
   7 *  it under the terms of the GNU General Public License as published by
   8 *  the Free Software Foundation; either version 2 of the License, or
   9 *  (at your option) any later version.
  10 *
  11 *  This program is distributed in the hope that it will be useful,
  12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *  GNU General Public License for more details.
  15 *
  16 *  You should have received a copy of the GNU General Public License
  17 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include "qemu/osdep.h"
  21#include "qemu.h"
  22#include "cpu_loop-common.h"
  23
  24void cpu_loop(CPUCRISState *env)
  25{
  26    CPUState *cs = CPU(cris_env_get_cpu(env));
  27    int trapnr, ret;
  28    target_siginfo_t info;
  29    
  30    while (1) {
  31        cpu_exec_start(cs);
  32        trapnr = cpu_exec(cs);
  33        cpu_exec_end(cs);
  34        process_queued_cpu_work(cs);
  35
  36        switch (trapnr) {
  37        case 0xaa:
  38            {
  39                info.si_signo = TARGET_SIGSEGV;
  40                info.si_errno = 0;
  41                /* XXX: check env->error_code */
  42                info.si_code = TARGET_SEGV_MAPERR;
  43                info._sifields._sigfault._addr = env->pregs[PR_EDA];
  44                queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  45            }
  46            break;
  47        case EXCP_INTERRUPT:
  48          /* just indicate that signals should be handled asap */
  49          break;
  50        case EXCP_BREAK:
  51            ret = do_syscall(env, 
  52                             env->regs[9], 
  53                             env->regs[10], 
  54                             env->regs[11], 
  55                             env->regs[12], 
  56                             env->regs[13], 
  57                             env->pregs[7], 
  58                             env->pregs[11],
  59                             0, 0);
  60            if (ret == -TARGET_ERESTARTSYS) {
  61                env->pc -= 2;
  62            } else if (ret != -TARGET_QEMU_ESIGRETURN) {
  63                env->regs[10] = ret;
  64            }
  65            break;
  66        case EXCP_DEBUG:
  67            info.si_signo = TARGET_SIGTRAP;
  68            info.si_errno = 0;
  69            info.si_code = TARGET_TRAP_BRKPT;
  70            queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  71            break;
  72        case EXCP_ATOMIC:
  73            cpu_exec_step_atomic(cs);
  74            break;
  75        default:
  76            fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
  77            cpu_dump_state(cs, stderr, fprintf, 0);
  78            exit(EXIT_FAILURE);
  79        }
  80        process_pending_signals (env);
  81    }
  82}
  83
  84void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
  85{
  86    CPUState *cpu = ENV_GET_CPU(env);
  87    TaskState *ts = cpu->opaque;
  88    struct image_info *info = ts->info;
  89
  90    env->regs[0] = regs->r0;
  91    env->regs[1] = regs->r1;
  92    env->regs[2] = regs->r2;
  93    env->regs[3] = regs->r3;
  94    env->regs[4] = regs->r4;
  95    env->regs[5] = regs->r5;
  96    env->regs[6] = regs->r6;
  97    env->regs[7] = regs->r7;
  98    env->regs[8] = regs->r8;
  99    env->regs[9] = regs->r9;
 100    env->regs[10] = regs->r10;
 101    env->regs[11] = regs->r11;
 102    env->regs[12] = regs->r12;
 103    env->regs[13] = regs->r13;
 104    env->regs[14] = info->start_stack;
 105    env->regs[15] = regs->acr;
 106    env->pc = regs->erp;
 107}
 108