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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" | |
a8d25326 | 21 | #include "qemu-common.h" |
cd71c089 LV |
22 | #include "qemu.h" |
23 | #include "cpu_loop-common.h" | |
24 | ||
c37dcb4f LV |
25 | void cpu_loop(CPUSH4State *env) |
26 | { | |
dad1c8ec | 27 | CPUState *cs = env_cpu(env); |
c37dcb4f LV |
28 | int trapnr, ret; |
29 | target_siginfo_t info; | |
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 0x160: | |
41 | env->pc += 2; | |
42 | ret = do_syscall(env, | |
43 | env->gregs[3], | |
44 | env->gregs[4], | |
45 | env->gregs[5], | |
46 | env->gregs[6], | |
47 | env->gregs[7], | |
48 | env->gregs[0], | |
49 | env->gregs[1], | |
50 | 0, 0); | |
51 | if (ret == -TARGET_ERESTARTSYS) { | |
52 | env->pc -= 2; | |
53 | } else if (ret != -TARGET_QEMU_ESIGRETURN) { | |
54 | env->gregs[0] = ret; | |
55 | } | |
56 | break; | |
57 | case EXCP_INTERRUPT: | |
58 | /* just indicate that signals should be handled asap */ | |
59 | break; | |
60 | case EXCP_DEBUG: | |
b10089a1 PM |
61 | info.si_signo = TARGET_SIGTRAP; |
62 | info.si_errno = 0; | |
63 | info.si_code = TARGET_TRAP_BRKPT; | |
64 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
c37dcb4f LV |
65 | break; |
66 | case 0xa0: | |
67 | case 0xc0: | |
68 | info.si_signo = TARGET_SIGSEGV; | |
69 | info.si_errno = 0; | |
70 | info.si_code = TARGET_SEGV_MAPERR; | |
71 | info._sifields._sigfault._addr = env->tea; | |
72 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
73 | break; | |
74 | case EXCP_ATOMIC: | |
75 | cpu_exec_step_atomic(cs); | |
76 | arch_interrupt = false; | |
77 | break; | |
78 | default: | |
84ca4fa9 | 79 | fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); |
90c84c56 | 80 | cpu_dump_state(cs, stderr, 0); |
c37dcb4f LV |
81 | exit(EXIT_FAILURE); |
82 | } | |
83 | process_pending_signals (env); | |
84 | ||
85 | /* Most of the traps imply an exception or interrupt, which | |
86 | implies an REI instruction has been executed. Which means | |
87 | that LDST (aka LOK_ADDR) should be cleared. But there are | |
88 | a few exceptions for traps internal to QEMU. */ | |
89 | if (arch_interrupt) { | |
90 | env->lock_addr = -1; | |
91 | } | |
92 | } | |
93 | } | |
94 | ||
cd71c089 LV |
95 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
96 | { | |
c37dcb4f LV |
97 | int i; |
98 | ||
99 | for(i = 0; i < 16; i++) { | |
100 | env->gregs[i] = regs->regs[i]; | |
101 | } | |
102 | env->pc = regs->pc; | |
cd71c089 | 103 | } |