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 "cpu_loop-common.h" 24 25 void cpu_loop(CPUCRISState *env) 26 { 27 CPUState *cs = env_cpu(env); 28 int trapnr, ret; 29 target_siginfo_t info; 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 0xaa: 39 { 40 info.si_signo = TARGET_SIGSEGV; 41 info.si_errno = 0; 42 /* XXX: check env->error_code */ 43 info.si_code = TARGET_SEGV_MAPERR; 44 info._sifields._sigfault._addr = env->pregs[PR_EDA]; 45 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 46 } 47 break; 48 case EXCP_INTERRUPT: 49 /* just indicate that signals should be handled asap */ 50 break; 51 case EXCP_BREAK: 52 ret = do_syscall(env, 53 env->regs[9], 54 env->regs[10], 55 env->regs[11], 56 env->regs[12], 57 env->regs[13], 58 env->pregs[7], 59 env->pregs[11], 60 0, 0); 61 if (ret == -TARGET_ERESTARTSYS) { 62 env->pc -= 2; 63 } else if (ret != -TARGET_QEMU_ESIGRETURN) { 64 env->regs[10] = ret; 65 } 66 break; 67 case EXCP_DEBUG: 68 info.si_signo = TARGET_SIGTRAP; 69 info.si_errno = 0; 70 info.si_code = TARGET_TRAP_BRKPT; 71 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 72 break; 73 case EXCP_ATOMIC: 74 cpu_exec_step_atomic(cs); 75 break; 76 default: 77 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); 78 cpu_dump_state(cs, stderr, 0); 79 exit(EXIT_FAILURE); 80 } 81 process_pending_signals (env); 82 } 83 } 84 85 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 86 { 87 CPUState *cpu = env_cpu(env); 88 TaskState *ts = cpu->opaque; 89 struct image_info *info = ts->info; 90 91 env->regs[0] = regs->r0; 92 env->regs[1] = regs->r1; 93 env->regs[2] = regs->r2; 94 env->regs[3] = regs->r3; 95 env->regs[4] = regs->r4; 96 env->regs[5] = regs->r5; 97 env->regs[6] = regs->r6; 98 env->regs[7] = regs->r7; 99 env->regs[8] = regs->r8; 100 env->regs[9] = regs->r9; 101 env->regs[10] = regs->r10; 102 env->regs[11] = regs->r11; 103 env->regs[12] = regs->r12; 104 env->regs[13] = regs->r13; 105 env->regs[14] = info->start_stack; 106 env->regs[15] = regs->acr; 107 env->pc = regs->erp; 108 } 109