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-common.h" 22 #include "qemu.h" 23 #include "user-internals.h" 24 #include "cpu_loop-common.h" 25 #include "signal-common.h" 26 27 void cpu_loop(CPUCRISState *env) 28 { 29 CPUState *cs = env_cpu(env); 30 int trapnr, ret; 31 target_siginfo_t info; 32 33 while (1) { 34 cpu_exec_start(cs); 35 trapnr = cpu_exec(cs); 36 cpu_exec_end(cs); 37 process_queued_cpu_work(cs); 38 39 switch (trapnr) { 40 case EXCP_INTERRUPT: 41 /* just indicate that signals should be handled asap */ 42 break; 43 case EXCP_BREAK: 44 ret = do_syscall(env, 45 env->regs[9], 46 env->regs[10], 47 env->regs[11], 48 env->regs[12], 49 env->regs[13], 50 env->pregs[7], 51 env->pregs[11], 52 0, 0); 53 if (ret == -QEMU_ERESTARTSYS) { 54 env->pc -= 2; 55 } else if (ret != -QEMU_ESIGRETURN) { 56 env->regs[10] = ret; 57 } 58 break; 59 case EXCP_DEBUG: 60 info.si_signo = TARGET_SIGTRAP; 61 info.si_errno = 0; 62 info.si_code = TARGET_TRAP_BRKPT; 63 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 64 break; 65 case EXCP_ATOMIC: 66 cpu_exec_step_atomic(cs); 67 break; 68 default: 69 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); 70 cpu_dump_state(cs, stderr, 0); 71 exit(EXIT_FAILURE); 72 } 73 process_pending_signals (env); 74 } 75 } 76 77 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 78 { 79 CPUState *cpu = env_cpu(env); 80 TaskState *ts = cpu->opaque; 81 struct image_info *info = ts->info; 82 83 env->regs[0] = regs->r0; 84 env->regs[1] = regs->r1; 85 env->regs[2] = regs->r2; 86 env->regs[3] = regs->r3; 87 env->regs[4] = regs->r4; 88 env->regs[5] = regs->r5; 89 env->regs[6] = regs->r6; 90 env->regs[7] = regs->r7; 91 env->regs[8] = regs->r8; 92 env->regs[9] = regs->r9; 93 env->regs[10] = regs->r10; 94 env->regs[11] = regs->r11; 95 env->regs[12] = regs->r12; 96 env->regs[13] = regs->r13; 97 env->regs[14] = info->start_stack; 98 env->regs[15] = regs->acr; 99 env->pc = regs->erp; 100 } 101