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" 21a8d25326SMarkus Armbruster #include "qemu-common.h" 22cd71c089SLaurent Vivier #include "qemu.h" 233b249d26SPeter Maydell #include "user-internals.h" 24cd71c089SLaurent Vivier #include "cpu_loop-common.h" 252113aed6SPeter Maydell #include "signal-common.h" 26cd71c089SLaurent Vivier 27ff9803b1SLaurent Vivier void cpu_loop(CPUM68KState *env) 28ff9803b1SLaurent Vivier { 29a8d92fd8SRichard Henderson CPUState *cs = env_cpu(env); 30ff9803b1SLaurent Vivier int trapnr; 31ff9803b1SLaurent Vivier unsigned int n; 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_HALT_INSN: 41ff9803b1SLaurent Vivier /* Semihosing syscall. */ 42ff9803b1SLaurent Vivier env->pc += 4; 43ff9803b1SLaurent Vivier do_m68k_semihosting(env, env->dregs[0]); 44ff9803b1SLaurent Vivier break; 45c6d0700fSLaurent Vivier case EXCP_ILLEGAL: 46ff9803b1SLaurent Vivier case EXCP_LINEA: 47ff9803b1SLaurent Vivier case EXCP_LINEF: 48*71dc6f74SRichard Henderson force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN, env->pc); 49ff9803b1SLaurent Vivier break; 50ff9803b1SLaurent Vivier case EXCP_CHK: 51*71dc6f74SRichard Henderson force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTOVF, env->pc); 52ff9803b1SLaurent Vivier break; 53ff9803b1SLaurent Vivier case EXCP_DIV0: 54*71dc6f74SRichard Henderson force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTDIV, env->pc); 55ff9803b1SLaurent Vivier break; 56ff9803b1SLaurent Vivier case EXCP_TRAP0: 57ff9803b1SLaurent Vivier { 58ff9803b1SLaurent Vivier abi_long ret; 59ff9803b1SLaurent Vivier n = env->dregs[0]; 60ff9803b1SLaurent Vivier env->pc += 2; 61ff9803b1SLaurent Vivier ret = do_syscall(env, 62ff9803b1SLaurent Vivier n, 63ff9803b1SLaurent Vivier env->dregs[1], 64ff9803b1SLaurent Vivier env->dregs[2], 65ff9803b1SLaurent Vivier env->dregs[3], 66ff9803b1SLaurent Vivier env->dregs[4], 67ff9803b1SLaurent Vivier env->dregs[5], 68ff9803b1SLaurent Vivier env->aregs[0], 69ff9803b1SLaurent Vivier 0, 0); 70af254a27SRichard Henderson if (ret == -QEMU_ERESTARTSYS) { 71ff9803b1SLaurent Vivier env->pc -= 2; 7257a0c938SRichard Henderson } else if (ret != -QEMU_ESIGRETURN) { 73ff9803b1SLaurent Vivier env->dregs[0] = ret; 74ff9803b1SLaurent Vivier } 75ff9803b1SLaurent Vivier } 76ff9803b1SLaurent Vivier break; 77ff9803b1SLaurent Vivier case EXCP_INTERRUPT: 78ff9803b1SLaurent Vivier /* just indicate that signals should be handled asap */ 79ff9803b1SLaurent Vivier break; 80ff9803b1SLaurent Vivier case EXCP_DEBUG: 81*71dc6f74SRichard Henderson force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc); 82ff9803b1SLaurent Vivier break; 83ff9803b1SLaurent Vivier case EXCP_ATOMIC: 84ff9803b1SLaurent Vivier cpu_exec_step_atomic(cs); 85ff9803b1SLaurent Vivier break; 86ff9803b1SLaurent Vivier default: 87ff9803b1SLaurent Vivier EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr); 88ff9803b1SLaurent Vivier abort(); 89ff9803b1SLaurent Vivier } 90ff9803b1SLaurent Vivier process_pending_signals(env); 91ff9803b1SLaurent Vivier } 92ff9803b1SLaurent Vivier } 93ff9803b1SLaurent Vivier 94cd71c089SLaurent Vivier void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 95cd71c089SLaurent Vivier { 9629a0af61SRichard Henderson CPUState *cpu = env_cpu(env); 97ff9803b1SLaurent Vivier TaskState *ts = cpu->opaque; 98ff9803b1SLaurent Vivier struct image_info *info = ts->info; 99ff9803b1SLaurent Vivier 100ff9803b1SLaurent Vivier env->pc = regs->pc; 101ff9803b1SLaurent Vivier env->dregs[0] = regs->d0; 102ff9803b1SLaurent Vivier env->dregs[1] = regs->d1; 103ff9803b1SLaurent Vivier env->dregs[2] = regs->d2; 104ff9803b1SLaurent Vivier env->dregs[3] = regs->d3; 105ff9803b1SLaurent Vivier env->dregs[4] = regs->d4; 106ff9803b1SLaurent Vivier env->dregs[5] = regs->d5; 107ff9803b1SLaurent Vivier env->dregs[6] = regs->d6; 108ff9803b1SLaurent Vivier env->dregs[7] = regs->d7; 109ff9803b1SLaurent Vivier env->aregs[0] = regs->a0; 110ff9803b1SLaurent Vivier env->aregs[1] = regs->a1; 111ff9803b1SLaurent Vivier env->aregs[2] = regs->a2; 112ff9803b1SLaurent Vivier env->aregs[3] = regs->a3; 113ff9803b1SLaurent Vivier env->aregs[4] = regs->a4; 114ff9803b1SLaurent Vivier env->aregs[5] = regs->a5; 115ff9803b1SLaurent Vivier env->aregs[6] = regs->a6; 116ff9803b1SLaurent Vivier env->aregs[7] = regs->usp; 117ff9803b1SLaurent Vivier env->sr = regs->sr; 118ff9803b1SLaurent Vivier 119ff9803b1SLaurent Vivier ts->stack_base = info->start_stack; 120ff9803b1SLaurent Vivier ts->heap_base = info->brk; 121ff9803b1SLaurent Vivier /* This will be filled in on the first SYS_HEAPINFO call. */ 122ff9803b1SLaurent Vivier ts->heap_limit = 0; 123cd71c089SLaurent Vivier } 124