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(CPUOpenRISCState *env) 25 { 26 CPUState *cs = env_cpu(env); 27 int trapnr; 28 abi_long ret; 29 target_siginfo_t info; 30 31 for (;;) { 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_SYSCALL: 39 env->pc += 4; /* 0xc00; */ 40 ret = do_syscall(env, 41 cpu_get_gpr(env, 11), /* return value */ 42 cpu_get_gpr(env, 3), /* r3 - r7 are params */ 43 cpu_get_gpr(env, 4), 44 cpu_get_gpr(env, 5), 45 cpu_get_gpr(env, 6), 46 cpu_get_gpr(env, 7), 47 cpu_get_gpr(env, 8), 0, 0); 48 if (ret == -TARGET_ERESTARTSYS) { 49 env->pc -= 4; 50 } else if (ret != -TARGET_QEMU_ESIGRETURN) { 51 cpu_set_gpr(env, 11, ret); 52 } 53 break; 54 case EXCP_DPF: 55 case EXCP_IPF: 56 case EXCP_RANGE: 57 info.si_signo = TARGET_SIGSEGV; 58 info.si_errno = 0; 59 info.si_code = TARGET_SEGV_MAPERR; 60 info._sifields._sigfault._addr = env->pc; 61 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 62 break; 63 case EXCP_ALIGN: 64 info.si_signo = TARGET_SIGBUS; 65 info.si_errno = 0; 66 info.si_code = TARGET_BUS_ADRALN; 67 info._sifields._sigfault._addr = env->pc; 68 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 69 break; 70 case EXCP_ILLEGAL: 71 info.si_signo = TARGET_SIGILL; 72 info.si_errno = 0; 73 info.si_code = TARGET_ILL_ILLOPC; 74 info._sifields._sigfault._addr = env->pc; 75 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 76 break; 77 case EXCP_FPE: 78 info.si_signo = TARGET_SIGFPE; 79 info.si_errno = 0; 80 info.si_code = 0; 81 info._sifields._sigfault._addr = env->pc; 82 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 83 break; 84 case EXCP_INTERRUPT: 85 /* We processed the pending cpu work above. */ 86 break; 87 case EXCP_DEBUG: 88 info.si_signo = TARGET_SIGTRAP; 89 info.si_errno = 0; 90 info.si_code = TARGET_TRAP_BRKPT; 91 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 92 break; 93 case EXCP_ATOMIC: 94 cpu_exec_step_atomic(cs); 95 break; 96 default: 97 g_assert_not_reached(); 98 } 99 process_pending_signals(env); 100 } 101 } 102 103 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 104 { 105 int i; 106 107 for (i = 0; i < 32; i++) { 108 cpu_set_gpr(env, i, regs->gpr[i]); 109 } 110 env->pc = regs->pc; 111 cpu_set_sr(env, regs->sr); 112 } 113