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20#include "qemu/osdep.h"
21#include "qemu.h"
22#include "cpu_loop-common.h"
23
24void cpu_loop(CPUMBState *env)
25{
26 CPUState *cs = CPU(mb_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
42 info.si_code = TARGET_SEGV_MAPERR;
43 info._sifields._sigfault._addr = 0;
44 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
45 }
46 break;
47 case EXCP_INTERRUPT:
48
49 break;
50 case EXCP_BREAK:
51
52 env->regs[14] += 4;
53 env->sregs[SR_PC] = env->regs[14];
54 ret = do_syscall(env,
55 env->regs[12],
56 env->regs[5],
57 env->regs[6],
58 env->regs[7],
59 env->regs[8],
60 env->regs[9],
61 env->regs[10],
62 0, 0);
63 if (ret == -TARGET_ERESTARTSYS) {
64
65 env->sregs[SR_PC] -= 4;
66 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
67 env->regs[3] = ret;
68 }
69
70
71
72
73
74
75 env->regs[14] = env->sregs[SR_PC];
76 break;
77 case EXCP_HW_EXCP:
78 env->regs[17] = env->sregs[SR_PC] + 4;
79 if (env->iflags & D_FLAG) {
80 env->sregs[SR_ESR] |= 1 << 12;
81 env->sregs[SR_PC] -= 4;
82
83 }
84
85 env->iflags &= ~(IMM_FLAG | D_FLAG);
86
87 switch (env->sregs[SR_ESR] & 31) {
88 case ESR_EC_DIVZERO:
89 info.si_signo = TARGET_SIGFPE;
90 info.si_errno = 0;
91 info.si_code = TARGET_FPE_FLTDIV;
92 info._sifields._sigfault._addr = 0;
93 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
94 break;
95 case ESR_EC_FPU:
96 info.si_signo = TARGET_SIGFPE;
97 info.si_errno = 0;
98 if (env->sregs[SR_FSR] & FSR_IO) {
99 info.si_code = TARGET_FPE_FLTINV;
100 }
101 if (env->sregs[SR_FSR] & FSR_DZ) {
102 info.si_code = TARGET_FPE_FLTDIV;
103 }
104 info._sifields._sigfault._addr = 0;
105 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
106 break;
107 default:
108 fprintf(stderr, "Unhandled hw-exception: 0x%" PRIx64 "\n",
109 env->sregs[SR_ESR] & ESR_EC_MASK);
110 cpu_dump_state(cs, stderr, fprintf, 0);
111 exit(EXIT_FAILURE);
112 break;
113 }
114 break;
115 case EXCP_DEBUG:
116 info.si_signo = TARGET_SIGTRAP;
117 info.si_errno = 0;
118 info.si_code = TARGET_TRAP_BRKPT;
119 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
120 break;
121 case EXCP_ATOMIC:
122 cpu_exec_step_atomic(cs);
123 break;
124 default:
125 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
126 cpu_dump_state(cs, stderr, fprintf, 0);
127 exit(EXIT_FAILURE);
128 }
129 process_pending_signals (env);
130 }
131}
132
133void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
134{
135 env->regs[0] = regs->r0;
136 env->regs[1] = regs->r1;
137 env->regs[2] = regs->r2;
138 env->regs[3] = regs->r3;
139 env->regs[4] = regs->r4;
140 env->regs[5] = regs->r5;
141 env->regs[6] = regs->r6;
142 env->regs[7] = regs->r7;
143 env->regs[8] = regs->r8;
144 env->regs[9] = regs->r9;
145 env->regs[10] = regs->r10;
146 env->regs[11] = regs->r11;
147 env->regs[12] = regs->r12;
148 env->regs[13] = regs->r13;
149 env->regs[14] = regs->r14;
150 env->regs[15] = regs->r15;
151 env->regs[16] = regs->r16;
152 env->regs[17] = regs->r17;
153 env->regs[18] = regs->r18;
154 env->regs[19] = regs->r19;
155 env->regs[20] = regs->r20;
156 env->regs[21] = regs->r21;
157 env->regs[22] = regs->r22;
158 env->regs[23] = regs->r23;
159 env->regs[24] = regs->r24;
160 env->regs[25] = regs->r25;
161 env->regs[26] = regs->r26;
162 env->regs[27] = regs->r27;
163 env->regs[28] = regs->r28;
164 env->regs[29] = regs->r29;
165 env->regs[30] = regs->r30;
166 env->regs[31] = regs->r31;
167 env->sregs[SR_PC] = regs->pc;
168}
169