void cpu_loop(CPUOpenRISCState *env) { CPUState *cs = CPU(openrisc_env_get_cpu(env)); int trapnr, gdbsig; for (;;) { cpu_exec_start(cs); trapnr = cpu_openrisc_exec(cs); cpu_exec_end(cs); gdbsig = 0; switch (trapnr) { case EXCP_RESET: qemu_log("\nReset request, exit, pc is %#x\n", env->pc); exit(EXIT_FAILURE); break; case EXCP_BUSERR: qemu_log("\nBus error, exit, pc is %#x\n", env->pc); gdbsig = TARGET_SIGBUS; break; case EXCP_DPF: case EXCP_IPF: cpu_dump_state(cs, stderr, fprintf, 0); gdbsig = TARGET_SIGSEGV; break; case EXCP_TICK: qemu_log("\nTick time interrupt pc is %#x\n", env->pc); break; case EXCP_ALIGN: qemu_log("\nAlignment pc is %#x\n", env->pc); gdbsig = TARGET_SIGBUS; break; case EXCP_ILLEGAL: qemu_log("\nIllegal instructionpc is %#x\n", env->pc); gdbsig = TARGET_SIGILL; break; case EXCP_INT: qemu_log("\nExternal interruptpc is %#x\n", env->pc); break; case EXCP_DTLBMISS: case EXCP_ITLBMISS: qemu_log("\nTLB miss\n"); break; case EXCP_RANGE: qemu_log("\nRange\n"); gdbsig = TARGET_SIGSEGV; break; case EXCP_SYSCALL: env->pc += 4; /* 0xc00; */ env->gpr[11] = do_syscall(env, env->gpr[11], /* return value */ env->gpr[3], /* r3 - r7 are params */ env->gpr[4], env->gpr[5], env->gpr[6], env->gpr[7], env->gpr[8], 0, 0); break; case EXCP_FPE: qemu_log("\nFloating point error\n"); break; case EXCP_TRAP: qemu_log("\nTrap\n"); gdbsig = TARGET_SIGTRAP; break; case EXCP_NR: qemu_log("\nNR\n"); break; default: qemu_log("\nqemu: unhandled CPU exception %#x - aborting\n", trapnr); cpu_dump_state(cs, stderr, fprintf, 0); gdbsig = TARGET_SIGILL; break; } if (gdbsig) { gdb_handlesig(cs, gdbsig); if (gdbsig != TARGET_SIGTRAP) { exit(EXIT_FAILURE); } } process_pending_signals(env); } }