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cd71c089 LV |
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 | ||
a5fd8ee1 LV |
24 | /* s390x masks the fault address it reports in si_addr for SIGSEGV and SIGBUS */ |
25 | #define S390X_FAIL_ADDR_MASK -4096LL | |
26 | ||
27 | void cpu_loop(CPUS390XState *env) | |
28 | { | |
29 | CPUState *cs = CPU(s390_env_get_cpu(env)); | |
30 | int trapnr, n, sig; | |
31 | target_siginfo_t info; | |
32 | target_ulong addr; | |
33 | abi_long ret; | |
34 | ||
35 | while (1) { | |
36 | cpu_exec_start(cs); | |
37 | trapnr = cpu_exec(cs); | |
38 | cpu_exec_end(cs); | |
39 | process_queued_cpu_work(cs); | |
40 | ||
41 | switch (trapnr) { | |
42 | case EXCP_INTERRUPT: | |
43 | /* Just indicate that signals should be handled asap. */ | |
44 | break; | |
45 | ||
46 | case EXCP_SVC: | |
47 | n = env->int_svc_code; | |
48 | if (!n) { | |
49 | /* syscalls > 255 */ | |
50 | n = env->regs[1]; | |
51 | } | |
52 | env->psw.addr += env->int_svc_ilen; | |
53 | ret = do_syscall(env, n, env->regs[2], env->regs[3], | |
54 | env->regs[4], env->regs[5], | |
55 | env->regs[6], env->regs[7], 0, 0); | |
56 | if (ret == -TARGET_ERESTARTSYS) { | |
57 | env->psw.addr -= env->int_svc_ilen; | |
58 | } else if (ret != -TARGET_QEMU_ESIGRETURN) { | |
59 | env->regs[2] = ret; | |
60 | } | |
61 | break; | |
62 | ||
63 | case EXCP_DEBUG: | |
b10089a1 PM |
64 | sig = TARGET_SIGTRAP; |
65 | n = TARGET_TRAP_BRKPT; | |
66 | goto do_signal_pc; | |
a5fd8ee1 LV |
67 | case EXCP_PGM: |
68 | n = env->int_pgm_code; | |
69 | switch (n) { | |
70 | case PGM_OPERATION: | |
71 | case PGM_PRIVILEGED: | |
72 | sig = TARGET_SIGILL; | |
73 | n = TARGET_ILL_ILLOPC; | |
74 | goto do_signal_pc; | |
75 | case PGM_PROTECTION: | |
76 | case PGM_ADDRESSING: | |
77 | sig = TARGET_SIGSEGV; | |
78 | /* XXX: check env->error_code */ | |
79 | n = TARGET_SEGV_MAPERR; | |
80 | addr = env->__excp_addr & S390X_FAIL_ADDR_MASK; | |
81 | goto do_signal; | |
82 | case PGM_EXECUTE: | |
83 | case PGM_SPECIFICATION: | |
84 | case PGM_SPECIAL_OP: | |
85 | case PGM_OPERAND: | |
86 | do_sigill_opn: | |
87 | sig = TARGET_SIGILL; | |
88 | n = TARGET_ILL_ILLOPN; | |
89 | goto do_signal_pc; | |
90 | ||
91 | case PGM_FIXPT_OVERFLOW: | |
92 | sig = TARGET_SIGFPE; | |
93 | n = TARGET_FPE_INTOVF; | |
94 | goto do_signal_pc; | |
95 | case PGM_FIXPT_DIVIDE: | |
96 | sig = TARGET_SIGFPE; | |
97 | n = TARGET_FPE_INTDIV; | |
98 | goto do_signal_pc; | |
99 | ||
100 | case PGM_DATA: | |
101 | n = (env->fpc >> 8) & 0xff; | |
102 | if (n == 0xff) { | |
103 | /* compare-and-trap */ | |
104 | goto do_sigill_opn; | |
105 | } else { | |
106 | /* An IEEE exception, simulated or otherwise. */ | |
107 | if (n & 0x80) { | |
108 | n = TARGET_FPE_FLTINV; | |
109 | } else if (n & 0x40) { | |
110 | n = TARGET_FPE_FLTDIV; | |
111 | } else if (n & 0x20) { | |
112 | n = TARGET_FPE_FLTOVF; | |
113 | } else if (n & 0x10) { | |
114 | n = TARGET_FPE_FLTUND; | |
115 | } else if (n & 0x08) { | |
116 | n = TARGET_FPE_FLTRES; | |
117 | } else { | |
118 | /* ??? Quantum exception; BFP, DFP error. */ | |
119 | goto do_sigill_opn; | |
120 | } | |
121 | sig = TARGET_SIGFPE; | |
122 | goto do_signal_pc; | |
123 | } | |
124 | ||
125 | default: | |
126 | fprintf(stderr, "Unhandled program exception: %#x\n", n); | |
90c84c56 | 127 | cpu_dump_state(cs, stderr, 0); |
a5fd8ee1 LV |
128 | exit(EXIT_FAILURE); |
129 | } | |
130 | break; | |
131 | ||
132 | do_signal_pc: | |
133 | addr = env->psw.addr; | |
134 | do_signal: | |
135 | info.si_signo = sig; | |
136 | info.si_errno = 0; | |
137 | info.si_code = n; | |
138 | info._sifields._sigfault._addr = addr; | |
139 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
140 | break; | |
141 | ||
142 | case EXCP_ATOMIC: | |
143 | cpu_exec_step_atomic(cs); | |
144 | break; | |
145 | default: | |
146 | fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); | |
90c84c56 | 147 | cpu_dump_state(cs, stderr, 0); |
a5fd8ee1 LV |
148 | exit(EXIT_FAILURE); |
149 | } | |
150 | process_pending_signals (env); | |
151 | } | |
152 | } | |
153 | ||
cd71c089 LV |
154 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
155 | { | |
a5fd8ee1 LV |
156 | int i; |
157 | for (i = 0; i < 16; i++) { | |
158 | env->regs[i] = regs->gprs[i]; | |
159 | } | |
160 | env->psw.mask = regs->psw.mask; | |
161 | env->psw.addr = regs->psw.addr; | |
cd71c089 | 162 | } |