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20#include "qemu/osdep.h"
21#include "qemu.h"
22#include "cpu_loop-common.h"
23
24void cpu_loop(CPUAlphaState *env)
25{
26 CPUState *cs = CPU(alpha_env_get_cpu(env));
27 int trapnr;
28 target_siginfo_t info;
29 abi_long sysret;
30
31 while (1) {
32 bool arch_interrupt = true;
33
34 cpu_exec_start(cs);
35 trapnr = cpu_exec(cs);
36 cpu_exec_end(cs);
37 process_queued_cpu_work(cs);
38
39 switch (trapnr) {
40 case EXCP_RESET:
41 fprintf(stderr, "Reset requested. Exit\n");
42 exit(EXIT_FAILURE);
43 break;
44 case EXCP_MCHK:
45 fprintf(stderr, "Machine check exception. Exit\n");
46 exit(EXIT_FAILURE);
47 break;
48 case EXCP_SMP_INTERRUPT:
49 case EXCP_CLK_INTERRUPT:
50 case EXCP_DEV_INTERRUPT:
51 fprintf(stderr, "External interrupt. Exit\n");
52 exit(EXIT_FAILURE);
53 break;
54 case EXCP_MMFAULT:
55 info.si_signo = TARGET_SIGSEGV;
56 info.si_errno = 0;
57 info.si_code = (page_get_flags(env->trap_arg0) & PAGE_VALID
58 ? TARGET_SEGV_ACCERR : TARGET_SEGV_MAPERR);
59 info._sifields._sigfault._addr = env->trap_arg0;
60 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
61 break;
62 case EXCP_UNALIGN:
63 info.si_signo = TARGET_SIGBUS;
64 info.si_errno = 0;
65 info.si_code = TARGET_BUS_ADRALN;
66 info._sifields._sigfault._addr = env->trap_arg0;
67 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
68 break;
69 case EXCP_OPCDEC:
70 do_sigill:
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_ARITH:
78 info.si_signo = TARGET_SIGFPE;
79 info.si_errno = 0;
80 info.si_code = TARGET_FPE_FLTINV;
81 info._sifields._sigfault._addr = env->pc;
82 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
83 break;
84 case EXCP_FEN:
85
86 break;
87 case EXCP_CALL_PAL:
88 switch (env->error_code) {
89 case 0x80:
90
91 info.si_signo = TARGET_SIGTRAP;
92 info.si_errno = 0;
93 info.si_code = TARGET_TRAP_BRKPT;
94 info._sifields._sigfault._addr = env->pc;
95 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
96 break;
97 case 0x81:
98
99 info.si_signo = TARGET_SIGTRAP;
100 info.si_errno = 0;
101 info.si_code = 0;
102 info._sifields._sigfault._addr = env->pc;
103 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
104 break;
105 case 0x83:
106
107 trapnr = env->ir[IR_V0];
108 sysret = do_syscall(env, trapnr,
109 env->ir[IR_A0], env->ir[IR_A1],
110 env->ir[IR_A2], env->ir[IR_A3],
111 env->ir[IR_A4], env->ir[IR_A5],
112 0, 0);
113 if (sysret == -TARGET_ERESTARTSYS) {
114 env->pc -= 4;
115 break;
116 }
117 if (sysret == -TARGET_QEMU_ESIGRETURN) {
118 break;
119 }
120
121
122
123 trapnr = (env->ir[IR_V0] != 0 && sysret < 0);
124 env->ir[IR_V0] = (trapnr ? -sysret : sysret);
125 env->ir[IR_A3] = trapnr;
126 break;
127 case 0x86:
128
129
130
131
132
133
134 break;
135 case 0x9E:
136
137
138 abort();
139 case 0x9F:
140
141
142 abort();
143 case 0xAA:
144
145 info.si_signo = TARGET_SIGFPE;
146 switch (env->ir[IR_A0]) {
147 case TARGET_GEN_INTOVF:
148 info.si_code = TARGET_FPE_INTOVF;
149 break;
150 case TARGET_GEN_INTDIV:
151 info.si_code = TARGET_FPE_INTDIV;
152 break;
153 case TARGET_GEN_FLTOVF:
154 info.si_code = TARGET_FPE_FLTOVF;
155 break;
156 case TARGET_GEN_FLTUND:
157 info.si_code = TARGET_FPE_FLTUND;
158 break;
159 case TARGET_GEN_FLTINV:
160 info.si_code = TARGET_FPE_FLTINV;
161 break;
162 case TARGET_GEN_FLTINE:
163 info.si_code = TARGET_FPE_FLTRES;
164 break;
165 case TARGET_GEN_ROPRAND:
166 info.si_code = 0;
167 break;
168 default:
169 info.si_signo = TARGET_SIGTRAP;
170 info.si_code = 0;
171 break;
172 }
173 info.si_errno = 0;
174 info._sifields._sigfault._addr = env->pc;
175 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
176 break;
177 default:
178 goto do_sigill;
179 }
180 break;
181 case EXCP_DEBUG:
182 info.si_signo = TARGET_SIGTRAP;
183 info.si_errno = 0;
184 info.si_code = TARGET_TRAP_BRKPT;
185 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
186 break;
187 case EXCP_INTERRUPT:
188
189 break;
190 case EXCP_ATOMIC:
191 cpu_exec_step_atomic(cs);
192 arch_interrupt = false;
193 break;
194 default:
195 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
196 cpu_dump_state(cs, stderr, fprintf, 0);
197 exit(EXIT_FAILURE);
198 }
199 process_pending_signals (env);
200
201
202
203
204
205 if (arch_interrupt) {
206 env->flags &= ~ENV_FLAG_RX_FLAG;
207 env->lock_addr = -1;
208 }
209 }
210}
211
212void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
213{
214 int i;
215
216 for(i = 0; i < 28; i++) {
217 env->ir[i] = ((abi_ulong *)regs)[i];
218 }
219 env->ir[IR_SP] = regs->usp;
220 env->pc = regs->pc;
221}
222