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20#include "qemu/osdep.h"
21#include "qemu-common.h"
22#include "qemu.h"
23#include "cpu_loop-common.h"
24
25
26#define S390X_FAIL_ADDR_MASK -4096LL
27
28void cpu_loop(CPUS390XState *env)
29{
30 CPUState *cs = env_cpu(env);
31 int trapnr, n, sig;
32 target_siginfo_t info;
33 target_ulong addr;
34 abi_long ret;
35
36 while (1) {
37 cpu_exec_start(cs);
38 trapnr = cpu_exec(cs);
39 cpu_exec_end(cs);
40 process_queued_cpu_work(cs);
41
42 switch (trapnr) {
43 case EXCP_INTERRUPT:
44
45 break;
46
47 case EXCP_SVC:
48 n = env->int_svc_code;
49 if (!n) {
50
51 n = env->regs[1];
52 }
53 env->psw.addr += env->int_svc_ilen;
54 ret = do_syscall(env, n, env->regs[2], env->regs[3],
55 env->regs[4], env->regs[5],
56 env->regs[6], env->regs[7], 0, 0);
57 if (ret == -TARGET_ERESTARTSYS) {
58 env->psw.addr -= env->int_svc_ilen;
59 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
60 env->regs[2] = ret;
61 }
62 break;
63
64 case EXCP_DEBUG:
65 sig = TARGET_SIGTRAP;
66 n = TARGET_TRAP_BRKPT;
67 goto do_signal_pc;
68 case EXCP_PGM:
69 n = env->int_pgm_code;
70 switch (n) {
71 case PGM_OPERATION:
72 case PGM_PRIVILEGED:
73 sig = TARGET_SIGILL;
74 n = TARGET_ILL_ILLOPC;
75 goto do_signal_pc;
76 case PGM_PROTECTION:
77 case PGM_ADDRESSING:
78 sig = TARGET_SIGSEGV;
79
80 n = TARGET_SEGV_MAPERR;
81 addr = env->__excp_addr & S390X_FAIL_ADDR_MASK;
82 goto do_signal;
83 case PGM_EXECUTE:
84 case PGM_SPECIFICATION:
85 case PGM_SPECIAL_OP:
86 case PGM_OPERAND:
87 do_sigill_opn:
88 sig = TARGET_SIGILL;
89 n = TARGET_ILL_ILLOPN;
90 goto do_signal_pc;
91
92 case PGM_FIXPT_OVERFLOW:
93 sig = TARGET_SIGFPE;
94 n = TARGET_FPE_INTOVF;
95 goto do_signal_pc;
96 case PGM_FIXPT_DIVIDE:
97 sig = TARGET_SIGFPE;
98 n = TARGET_FPE_INTDIV;
99 goto do_signal_pc;
100
101 case PGM_DATA:
102 n = (env->fpc >> 8) & 0xff;
103 if (n == 0xff) {
104
105 goto do_sigill_opn;
106 } else {
107
108 if (n & 0x80) {
109 n = TARGET_FPE_FLTINV;
110 } else if (n & 0x40) {
111 n = TARGET_FPE_FLTDIV;
112 } else if (n & 0x20) {
113 n = TARGET_FPE_FLTOVF;
114 } else if (n & 0x10) {
115 n = TARGET_FPE_FLTUND;
116 } else if (n & 0x08) {
117 n = TARGET_FPE_FLTRES;
118 } else {
119
120 goto do_sigill_opn;
121 }
122 sig = TARGET_SIGFPE;
123 goto do_signal_pc;
124 }
125
126 default:
127 fprintf(stderr, "Unhandled program exception: %#x\n", n);
128 cpu_dump_state(cs, stderr, 0);
129 exit(EXIT_FAILURE);
130 }
131 break;
132
133 do_signal_pc:
134 addr = env->psw.addr;
135 do_signal:
136 info.si_signo = sig;
137 info.si_errno = 0;
138 info.si_code = n;
139 info._sifields._sigfault._addr = addr;
140 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
141 break;
142
143 case EXCP_ATOMIC:
144 cpu_exec_step_atomic(cs);
145 break;
146 default:
147 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
148 cpu_dump_state(cs, stderr, 0);
149 exit(EXIT_FAILURE);
150 }
151 process_pending_signals (env);
152 }
153}
154
155void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
156{
157 int i;
158 for (i = 0; i < 16; i++) {
159 env->regs[i] = regs->gprs[i];
160 }
161 env->psw.mask = regs->psw.mask;
162 env->psw.addr = regs->psw.addr;
163}
164