linux-user/cris/cpu_loop.c

   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-common.h"
  22 #include "qemu.h"
  23 #include "cpu_loop-common.h"
  24 #include "signal-common.h"
  25
  26 void cpu_loop(CPUCRISState *env)
  27 {
  28     CPUState *cs = env_cpu(env);
  29     int trapnr, ret;
  30     target_siginfo_t info;
  31
  32     while (1) {
  33         cpu_exec_start(cs);
  34         trapnr = cpu_exec(cs);
  35         cpu_exec_end(cs);
  36         process_queued_cpu_work(cs);
  37
  38         switch (trapnr) {
  39         case 0xaa:
  40             {
  41                 info.si_signo = TARGET_SIGSEGV;
  42                 info.si_errno = 0;
  43                 /* XXX: check env->error_code */
  44                 info.si_code = TARGET_SEGV_MAPERR;
  45                 info._sifields._sigfault._addr = env->pregs[PR_EDA];
  46                 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  47             }
  48             break;
  49         case EXCP_INTERRUPT:
  50           /* just indicate that signals should be handled asap */
  51           break;
  52         case EXCP_BREAK:
  53             ret = do_syscall(env,
  54                              env->regs[9],
  55                              env->regs[10],
  56                              env->regs[11],
  57                              env->regs[12],
  58                              env->regs[13],
  59                              env->pregs[7],
  60                              env->pregs[11],
  61                              0, 0);
  62             if (ret == -TARGET_ERESTARTSYS) {
  63                 env->pc -= 2;
  64             } else if (ret != -TARGET_QEMU_ESIGRETURN) {
  65                 env->regs[10] = ret;
  66             }
  67             break;
  68         case EXCP_DEBUG:
  69             info.si_signo = TARGET_SIGTRAP;
  70             info.si_errno = 0;
  71             info.si_code = TARGET_TRAP_BRKPT;
  72             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  73             break;
  74         case EXCP_ATOMIC:
  75             cpu_exec_step_atomic(cs);
  76             break;
  77         default:
  78             fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
  79             cpu_dump_state(cs, stderr, 0);
  80             exit(EXIT_FAILURE);
  81         }
  82         process_pending_signals (env);
  83     }
  84 }
  85
  86 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
  87 {
  88     CPUState *cpu = env_cpu(env);
  89     TaskState *ts = cpu->opaque;
  90     struct image_info *info = ts->info;
  91
  92     env->regs[0] = regs->r0;
  93     env->regs[1] = regs->r1;
  94     env->regs[2] = regs->r2;
  95     env->regs[3] = regs->r3;
  96     env->regs[4] = regs->r4;
  97     env->regs[5] = regs->r5;
  98     env->regs[6] = regs->r6;
  99     env->regs[7] = regs->r7;
 100     env->regs[8] = regs->r8;
 101     env->regs[9] = regs->r9;
 102     env->regs[10] = regs->r10;
 103     env->regs[11] = regs->r11;
 104     env->regs[12] = regs->r12;
 105     env->regs[13] = regs->r13;
 106     env->regs[14] = info->start_stack;
 107     env->regs[15] = regs->acr;
 108     env->pc = regs->erp;
 109 }