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.h" 22 #include "user-internals.h" 23 #include "cpu_loop-common.h" 24 #include "signal-common.h" 25 26 void cpu_loop(CPUCRISState *env) 27 { 28 CPUState *cs = env_cpu(env); 29 int trapnr, ret; 30 31 while (1) { 32 cpu_exec_start(cs); 33 trapnr = cpu_exec(cs); 34 cpu_exec_end(cs); 35 process_queued_cpu_work(cs); 36 37 switch (trapnr) { 38 case EXCP_INTERRUPT: 39 /* just indicate that signals should be handled asap */ 40 break; 41 case EXCP_BREAK: 42 ret = do_syscall(env, 43 env->regs[9], 44 env->regs[10], 45 env->regs[11], 46 env->regs[12], 47 env->regs[13], 48 env->pregs[7], 49 env->pregs[11], 50 0, 0); 51 if (ret == -QEMU_ERESTARTSYS) { 52 env->pc -= 2; 53 } else if (ret != -QEMU_ESIGRETURN) { 54 env->regs[10] = ret; 55 } 56 break; 57 case EXCP_DEBUG: 58 force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->pc); 59 break; 60 case EXCP_ATOMIC: 61 cpu_exec_step_atomic(cs); 62 break; 63 default: 64 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); 65 cpu_dump_state(cs, stderr, 0); 66 exit(EXIT_FAILURE); 67 } 68 process_pending_signals (env); 69 } 70 } 71 72 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 73 { 74 CPUState *cpu = env_cpu(env); 75 TaskState *ts = get_task_state(cpu); 76 struct image_info *info = ts->info; 77 78 env->regs[0] = regs->r0; 79 env->regs[1] = regs->r1; 80 env->regs[2] = regs->r2; 81 env->regs[3] = regs->r3; 82 env->regs[4] = regs->r4; 83 env->regs[5] = regs->r5; 84 env->regs[6] = regs->r6; 85 env->regs[7] = regs->r7; 86 env->regs[8] = regs->r8; 87 env->regs[9] = regs->r9; 88 env->regs[10] = regs->r10; 89 env->regs[11] = regs->r11; 90 env->regs[12] = regs->r12; 91 env->regs[13] = regs->r13; 92 env->regs[14] = info->start_stack; 93 env->regs[15] = regs->acr; 94 env->pc = regs->erp; 95 } 96