linux-user/openrisc/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
  25 void cpu_loop(CPUOpenRISCState *env)
  26 {
  27     CPUState *cs = env_cpu(env);
  28     int trapnr;
  29     abi_long ret;
  30     target_siginfo_t info;
  31
  32     for (;;) {
  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 EXCP_SYSCALL:
  40             env->pc += 4;   /* 0xc00; */
  41             ret = do_syscall(env,
  42                              cpu_get_gpr(env, 11), /* return value       */
  43                              cpu_get_gpr(env, 3),  /* r3 - r7 are params */
  44                              cpu_get_gpr(env, 4),
  45                              cpu_get_gpr(env, 5),
  46                              cpu_get_gpr(env, 6),
  47                              cpu_get_gpr(env, 7),
  48                              cpu_get_gpr(env, 8), 0, 0);
  49             if (ret == -TARGET_ERESTARTSYS) {
  50                 env->pc -= 4;
  51             } else if (ret != -TARGET_QEMU_ESIGRETURN) {
  52                 cpu_set_gpr(env, 11, ret);
  53             }
  54             break;
  55         case EXCP_DPF:
  56         case EXCP_IPF:
  57         case EXCP_RANGE:
  58             info.si_signo = TARGET_SIGSEGV;
  59             info.si_errno = 0;
  60             info.si_code = TARGET_SEGV_MAPERR;
  61             info._sifields._sigfault._addr = env->pc;
  62             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  63             break;
  64         case EXCP_ALIGN:
  65             info.si_signo = TARGET_SIGBUS;
  66             info.si_errno = 0;
  67             info.si_code = TARGET_BUS_ADRALN;
  68             info._sifields._sigfault._addr = env->pc;
  69             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  70             break;
  71         case EXCP_ILLEGAL:
  72             info.si_signo = TARGET_SIGILL;
  73             info.si_errno = 0;
  74             info.si_code = TARGET_ILL_ILLOPC;
  75             info._sifields._sigfault._addr = env->pc;
  76             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  77             break;
  78         case EXCP_FPE:
  79             info.si_signo = TARGET_SIGFPE;
  80             info.si_errno = 0;
  81             info.si_code = 0;
  82             info._sifields._sigfault._addr = env->pc;
  83             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  84             break;
  85         case EXCP_INTERRUPT:
  86             /* We processed the pending cpu work above.  */
  87             break;
  88         case EXCP_DEBUG:
  89             info.si_signo = TARGET_SIGTRAP;
  90             info.si_errno = 0;
  91             info.si_code = TARGET_TRAP_BRKPT;
  92             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
  93             break;
  94         case EXCP_ATOMIC:
  95             cpu_exec_step_atomic(cs);
  96             break;
  97         default:
  98             g_assert_not_reached();
  99         }
 100         process_pending_signals(env);
 101     }
 102 }
 103
 104 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
 105 {
 106     int i;
 107
 108     for (i = 0; i < 32; i++) {
 109         cpu_set_gpr(env, i, regs->gpr[i]);
 110     }
 111     env->pc = regs->pc;
 112     cpu_set_sr(env, regs->sr);
 113 }