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(CPUOpenRISCState *env) 26 { 27 CPUState *cs = env_cpu(env); 28 int trapnr; 29 abi_long ret; 30 target_siginfo_t info; 31 32 for (;;) { 33 cpu_exec_start(cs); 34 trapnr = cpu_exec(cs); 35 cpu_exec_end(cs); 36 process_queued_cpu_work(cs); 37 38 switch (trapnr) { 39 case EXCP_SYSCALL: 40 env->pc += 4; /* 0xc00; */ 41 ret = do_syscall(env, 42 cpu_get_gpr(env, 11), /* return value */ 43 cpu_get_gpr(env, 3), /* r3 - r7 are params */ 44 cpu_get_gpr(env, 4), 45 cpu_get_gpr(env, 5), 46 cpu_get_gpr(env, 6), 47 cpu_get_gpr(env, 7), 48 cpu_get_gpr(env, 8), 0, 0); 49 if (ret == -TARGET_ERESTARTSYS) { 50 env->pc -= 4; 51 } else if (ret != -TARGET_QEMU_ESIGRETURN) { 52 cpu_set_gpr(env, 11, ret); 53 } 54 break; 55 case EXCP_DPF: 56 case EXCP_IPF: 57 case EXCP_RANGE: 58 info.si_signo = TARGET_SIGSEGV; 59 info.si_errno = 0; 60 info.si_code = TARGET_SEGV_MAPERR; 61 info._sifields._sigfault._addr = env->pc; 62 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 63 break; 64 case EXCP_ALIGN: 65 info.si_signo = TARGET_SIGBUS; 66 info.si_errno = 0; 67 info.si_code = TARGET_BUS_ADRALN; 68 info._sifields._sigfault._addr = env->pc; 69 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 70 break; 71 case EXCP_ILLEGAL: 72 info.si_signo = TARGET_SIGILL; 73 info.si_errno = 0; 74 info.si_code = TARGET_ILL_ILLOPC; 75 info._sifields._sigfault._addr = env->pc; 76 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 77 break; 78 case EXCP_FPE: 79 info.si_signo = TARGET_SIGFPE; 80 info.si_errno = 0; 81 info.si_code = 0; 82 info._sifields._sigfault._addr = env->pc; 83 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 84 break; 85 case EXCP_INTERRUPT: 86 /* We processed the pending cpu work above. */ 87 break; 88 case EXCP_DEBUG: 89 info.si_signo = TARGET_SIGTRAP; 90 info.si_errno = 0; 91 info.si_code = TARGET_TRAP_BRKPT; 92 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 93 break; 94 case EXCP_ATOMIC: 95 cpu_exec_step_atomic(cs); 96 break; 97 default: 98 g_assert_not_reached(); 99 } 100 process_pending_signals(env); 101 } 102 } 103 104 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 105 { 106 int i; 107 108 for (i = 0; i < 32; i++) { 109 cpu_set_gpr(env, i, regs->gpr[i]); 110 } 111 env->pc = regs->pc; 112 cpu_set_sr(env, regs->sr); 113 } 114