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 "cpu_loop-common.h" 23 24 void cpu_loop(CPUCRISState *env) 25 { 26 CPUState *cs = CPU(cris_env_get_cpu(env)); 27 int trapnr, ret; 28 target_siginfo_t info; 29 30 while (1) { 31 cpu_exec_start(cs); 32 trapnr = cpu_exec(cs); 33 cpu_exec_end(cs); 34 process_queued_cpu_work(cs); 35 36 switch (trapnr) { 37 case 0xaa: 38 { 39 info.si_signo = TARGET_SIGSEGV; 40 info.si_errno = 0; 41 /* XXX: check env->error_code */ 42 info.si_code = TARGET_SEGV_MAPERR; 43 info._sifields._sigfault._addr = env->pregs[PR_EDA]; 44 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 45 } 46 break; 47 case EXCP_INTERRUPT: 48 /* just indicate that signals should be handled asap */ 49 break; 50 case EXCP_BREAK: 51 ret = do_syscall(env, 52 env->regs[9], 53 env->regs[10], 54 env->regs[11], 55 env->regs[12], 56 env->regs[13], 57 env->pregs[7], 58 env->pregs[11], 59 0, 0); 60 if (ret == -TARGET_ERESTARTSYS) { 61 env->pc -= 2; 62 } else if (ret != -TARGET_QEMU_ESIGRETURN) { 63 env->regs[10] = ret; 64 } 65 break; 66 case EXCP_DEBUG: 67 { 68 int sig; 69 70 sig = gdb_handlesig(cs, TARGET_SIGTRAP); 71 if (sig) 72 { 73 info.si_signo = sig; 74 info.si_errno = 0; 75 info.si_code = TARGET_TRAP_BRKPT; 76 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 77 } 78 } 79 break; 80 case EXCP_ATOMIC: 81 cpu_exec_step_atomic(cs); 82 break; 83 default: 84 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); 85 cpu_dump_state(cs, stderr, fprintf, 0); 86 exit(EXIT_FAILURE); 87 } 88 process_pending_signals (env); 89 } 90 } 91 92 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 93 { 94 CPUState *cpu = ENV_GET_CPU(env); 95 TaskState *ts = cpu->opaque; 96 struct image_info *info = ts->info; 97 98 env->regs[0] = regs->r0; 99 env->regs[1] = regs->r1; 100 env->regs[2] = regs->r2; 101 env->regs[3] = regs->r3; 102 env->regs[4] = regs->r4; 103 env->regs[5] = regs->r5; 104 env->regs[6] = regs->r6; 105 env->regs[7] = regs->r7; 106 env->regs[8] = regs->r8; 107 env->regs[9] = regs->r9; 108 env->regs[10] = regs->r10; 109 env->regs[11] = regs->r11; 110 env->regs[12] = regs->r12; 111 env->regs[13] = regs->r13; 112 env->regs[14] = info->start_stack; 113 env->regs[15] = regs->acr; 114 env->pc = regs->erp; 115 } 116