| /* |
| * qemu user cpu loop |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu.h" |
| #include "cpu_loop-common.h" |
| |
| void cpu_loop(CPUSH4State *env) |
| { |
| CPUState *cs = CPU(sh_env_get_cpu(env)); |
| int trapnr, ret; |
| target_siginfo_t info; |
| |
| while (1) { |
| bool arch_interrupt = true; |
| |
| cpu_exec_start(cs); |
| trapnr = cpu_exec(cs); |
| cpu_exec_end(cs); |
| process_queued_cpu_work(cs); |
| |
| switch (trapnr) { |
| case 0x160: |
| env->pc += 2; |
| ret = do_syscall(env, |
| env->gregs[3], |
| env->gregs[4], |
| env->gregs[5], |
| env->gregs[6], |
| env->gregs[7], |
| env->gregs[0], |
| env->gregs[1], |
| 0, 0); |
| if (ret == -TARGET_ERESTARTSYS) { |
| env->pc -= 2; |
| } else if (ret != -TARGET_QEMU_ESIGRETURN) { |
| env->gregs[0] = ret; |
| } |
| break; |
| case EXCP_INTERRUPT: |
| /* just indicate that signals should be handled asap */ |
| break; |
| case EXCP_DEBUG: |
| { |
| int sig; |
| |
| sig = gdb_handlesig(cs, TARGET_SIGTRAP); |
| if (sig) { |
| info.si_signo = sig; |
| info.si_errno = 0; |
| info.si_code = TARGET_TRAP_BRKPT; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| } else { |
| arch_interrupt = false; |
| } |
| } |
| break; |
| case 0xa0: |
| case 0xc0: |
| info.si_signo = TARGET_SIGSEGV; |
| info.si_errno = 0; |
| info.si_code = TARGET_SEGV_MAPERR; |
| info._sifields._sigfault._addr = env->tea; |
| queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); |
| break; |
| case EXCP_ATOMIC: |
| cpu_exec_step_atomic(cs); |
| arch_interrupt = false; |
| break; |
| default: |
| printf ("Unhandled trap: 0x%x\n", trapnr); |
| cpu_dump_state(cs, stderr, fprintf, 0); |
| exit(EXIT_FAILURE); |
| } |
| process_pending_signals (env); |
| |
| /* Most of the traps imply an exception or interrupt, which |
| implies an REI instruction has been executed. Which means |
| that LDST (aka LOK_ADDR) should be cleared. But there are |
| a few exceptions for traps internal to QEMU. */ |
| if (arch_interrupt) { |
| env->lock_addr = -1; |
| } |
| } |
| } |
| |
| void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
| { |
| int i; |
| |
| for(i = 0; i < 16; i++) { |
| env->gregs[i] = regs->regs[i]; |
| } |
| env->pc = regs->pc; |
| } |