1cd71c089SLaurent Vivier /* 2cd71c089SLaurent Vivier * qemu user cpu loop 3cd71c089SLaurent Vivier * 4cd71c089SLaurent Vivier * Copyright (c) 2003-2008 Fabrice Bellard 5cd71c089SLaurent Vivier * 6cd71c089SLaurent Vivier * This program is free software; you can redistribute it and/or modify 7cd71c089SLaurent Vivier * it under the terms of the GNU General Public License as published by 8cd71c089SLaurent Vivier * the Free Software Foundation; either version 2 of the License, or 9cd71c089SLaurent Vivier * (at your option) any later version. 10cd71c089SLaurent Vivier * 11cd71c089SLaurent Vivier * This program is distributed in the hope that it will be useful, 12cd71c089SLaurent Vivier * but WITHOUT ANY WARRANTY; without even the implied warranty of 13cd71c089SLaurent Vivier * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14cd71c089SLaurent Vivier * GNU General Public License for more details. 15cd71c089SLaurent Vivier * 16cd71c089SLaurent Vivier * You should have received a copy of the GNU General Public License 17cd71c089SLaurent Vivier * along with this program; if not, see <http://www.gnu.org/licenses/>. 18cd71c089SLaurent Vivier */ 19cd71c089SLaurent Vivier 20cd71c089SLaurent Vivier #include "qemu/osdep.h" 21*a8d25326SMarkus Armbruster #include "qemu-common.h" 22cd71c089SLaurent Vivier #include "qemu.h" 23cd71c089SLaurent Vivier #include "cpu_loop-common.h" 24cd71c089SLaurent Vivier 25ff9803b1SLaurent Vivier void cpu_loop(CPUM68KState *env) 26ff9803b1SLaurent Vivier { 27a8d92fd8SRichard Henderson CPUState *cs = env_cpu(env); 28ff9803b1SLaurent Vivier int trapnr; 29ff9803b1SLaurent Vivier unsigned int n; 30ff9803b1SLaurent Vivier target_siginfo_t info; 31ff9803b1SLaurent Vivier TaskState *ts = cs->opaque; 32ff9803b1SLaurent Vivier 33ff9803b1SLaurent Vivier for(;;) { 34ff9803b1SLaurent Vivier cpu_exec_start(cs); 35ff9803b1SLaurent Vivier trapnr = cpu_exec(cs); 36ff9803b1SLaurent Vivier cpu_exec_end(cs); 37ff9803b1SLaurent Vivier process_queued_cpu_work(cs); 38ff9803b1SLaurent Vivier 39ff9803b1SLaurent Vivier switch(trapnr) { 40ff9803b1SLaurent Vivier case EXCP_ILLEGAL: 41ff9803b1SLaurent Vivier { 42ff9803b1SLaurent Vivier if (ts->sim_syscalls) { 43ff9803b1SLaurent Vivier uint16_t nr; 44ff9803b1SLaurent Vivier get_user_u16(nr, env->pc + 2); 45ff9803b1SLaurent Vivier env->pc += 4; 46ff9803b1SLaurent Vivier do_m68k_simcall(env, nr); 47ff9803b1SLaurent Vivier } else { 48ff9803b1SLaurent Vivier goto do_sigill; 49ff9803b1SLaurent Vivier } 50ff9803b1SLaurent Vivier } 51ff9803b1SLaurent Vivier break; 52ff9803b1SLaurent Vivier case EXCP_HALT_INSN: 53ff9803b1SLaurent Vivier /* Semihosing syscall. */ 54ff9803b1SLaurent Vivier env->pc += 4; 55ff9803b1SLaurent Vivier do_m68k_semihosting(env, env->dregs[0]); 56ff9803b1SLaurent Vivier break; 57ff9803b1SLaurent Vivier case EXCP_LINEA: 58ff9803b1SLaurent Vivier case EXCP_LINEF: 59ff9803b1SLaurent Vivier do_sigill: 60ff9803b1SLaurent Vivier info.si_signo = TARGET_SIGILL; 61ff9803b1SLaurent Vivier info.si_errno = 0; 62ff9803b1SLaurent Vivier info.si_code = TARGET_ILL_ILLOPN; 63ff9803b1SLaurent Vivier info._sifields._sigfault._addr = env->pc; 64ff9803b1SLaurent Vivier queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 65ff9803b1SLaurent Vivier break; 66ff9803b1SLaurent Vivier case EXCP_CHK: 67ff9803b1SLaurent Vivier info.si_signo = TARGET_SIGFPE; 68ff9803b1SLaurent Vivier info.si_errno = 0; 69ff9803b1SLaurent Vivier info.si_code = TARGET_FPE_INTOVF; 70ff9803b1SLaurent Vivier info._sifields._sigfault._addr = env->pc; 71ff9803b1SLaurent Vivier queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 72ff9803b1SLaurent Vivier break; 73ff9803b1SLaurent Vivier case EXCP_DIV0: 74ff9803b1SLaurent Vivier info.si_signo = TARGET_SIGFPE; 75ff9803b1SLaurent Vivier info.si_errno = 0; 76ff9803b1SLaurent Vivier info.si_code = TARGET_FPE_INTDIV; 77ff9803b1SLaurent Vivier info._sifields._sigfault._addr = env->pc; 78ff9803b1SLaurent Vivier queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 79ff9803b1SLaurent Vivier break; 80ff9803b1SLaurent Vivier case EXCP_TRAP0: 81ff9803b1SLaurent Vivier { 82ff9803b1SLaurent Vivier abi_long ret; 83ff9803b1SLaurent Vivier ts->sim_syscalls = 0; 84ff9803b1SLaurent Vivier n = env->dregs[0]; 85ff9803b1SLaurent Vivier env->pc += 2; 86ff9803b1SLaurent Vivier ret = do_syscall(env, 87ff9803b1SLaurent Vivier n, 88ff9803b1SLaurent Vivier env->dregs[1], 89ff9803b1SLaurent Vivier env->dregs[2], 90ff9803b1SLaurent Vivier env->dregs[3], 91ff9803b1SLaurent Vivier env->dregs[4], 92ff9803b1SLaurent Vivier env->dregs[5], 93ff9803b1SLaurent Vivier env->aregs[0], 94ff9803b1SLaurent Vivier 0, 0); 95ff9803b1SLaurent Vivier if (ret == -TARGET_ERESTARTSYS) { 96ff9803b1SLaurent Vivier env->pc -= 2; 97ff9803b1SLaurent Vivier } else if (ret != -TARGET_QEMU_ESIGRETURN) { 98ff9803b1SLaurent Vivier env->dregs[0] = ret; 99ff9803b1SLaurent Vivier } 100ff9803b1SLaurent Vivier } 101ff9803b1SLaurent Vivier break; 102ff9803b1SLaurent Vivier case EXCP_INTERRUPT: 103ff9803b1SLaurent Vivier /* just indicate that signals should be handled asap */ 104ff9803b1SLaurent Vivier break; 105ff9803b1SLaurent Vivier case EXCP_ACCESS: 106ff9803b1SLaurent Vivier { 107ff9803b1SLaurent Vivier info.si_signo = TARGET_SIGSEGV; 108ff9803b1SLaurent Vivier info.si_errno = 0; 109ff9803b1SLaurent Vivier /* XXX: check env->error_code */ 110ff9803b1SLaurent Vivier info.si_code = TARGET_SEGV_MAPERR; 111ff9803b1SLaurent Vivier info._sifields._sigfault._addr = env->mmu.ar; 112ff9803b1SLaurent Vivier queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 113ff9803b1SLaurent Vivier } 114ff9803b1SLaurent Vivier break; 115ff9803b1SLaurent Vivier case EXCP_DEBUG: 116b10089a1SPeter Maydell info.si_signo = TARGET_SIGTRAP; 117ff9803b1SLaurent Vivier info.si_errno = 0; 118ff9803b1SLaurent Vivier info.si_code = TARGET_TRAP_BRKPT; 119ff9803b1SLaurent Vivier queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 120ff9803b1SLaurent Vivier break; 121ff9803b1SLaurent Vivier case EXCP_ATOMIC: 122ff9803b1SLaurent Vivier cpu_exec_step_atomic(cs); 123ff9803b1SLaurent Vivier break; 124ff9803b1SLaurent Vivier default: 125ff9803b1SLaurent Vivier EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr); 126ff9803b1SLaurent Vivier abort(); 127ff9803b1SLaurent Vivier } 128ff9803b1SLaurent Vivier process_pending_signals(env); 129ff9803b1SLaurent Vivier } 130ff9803b1SLaurent Vivier } 131ff9803b1SLaurent Vivier 132cd71c089SLaurent Vivier void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 133cd71c089SLaurent Vivier { 13429a0af61SRichard Henderson CPUState *cpu = env_cpu(env); 135ff9803b1SLaurent Vivier TaskState *ts = cpu->opaque; 136ff9803b1SLaurent Vivier struct image_info *info = ts->info; 137ff9803b1SLaurent Vivier 138ff9803b1SLaurent Vivier env->pc = regs->pc; 139ff9803b1SLaurent Vivier env->dregs[0] = regs->d0; 140ff9803b1SLaurent Vivier env->dregs[1] = regs->d1; 141ff9803b1SLaurent Vivier env->dregs[2] = regs->d2; 142ff9803b1SLaurent Vivier env->dregs[3] = regs->d3; 143ff9803b1SLaurent Vivier env->dregs[4] = regs->d4; 144ff9803b1SLaurent Vivier env->dregs[5] = regs->d5; 145ff9803b1SLaurent Vivier env->dregs[6] = regs->d6; 146ff9803b1SLaurent Vivier env->dregs[7] = regs->d7; 147ff9803b1SLaurent Vivier env->aregs[0] = regs->a0; 148ff9803b1SLaurent Vivier env->aregs[1] = regs->a1; 149ff9803b1SLaurent Vivier env->aregs[2] = regs->a2; 150ff9803b1SLaurent Vivier env->aregs[3] = regs->a3; 151ff9803b1SLaurent Vivier env->aregs[4] = regs->a4; 152ff9803b1SLaurent Vivier env->aregs[5] = regs->a5; 153ff9803b1SLaurent Vivier env->aregs[6] = regs->a6; 154ff9803b1SLaurent Vivier env->aregs[7] = regs->usp; 155ff9803b1SLaurent Vivier env->sr = regs->sr; 156ff9803b1SLaurent Vivier 157ff9803b1SLaurent Vivier ts->sim_syscalls = 1; 158ff9803b1SLaurent Vivier ts->stack_base = info->start_stack; 159ff9803b1SLaurent Vivier ts->heap_base = info->brk; 160ff9803b1SLaurent Vivier /* This will be filled in on the first SYS_HEAPINFO call. */ 161ff9803b1SLaurent Vivier ts->heap_limit = 0; 162cd71c089SLaurent Vivier } 163