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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 | 22 | #include "qemu.h" |
3b249d26 | 23 | #include "user-internals.h" |
cd71c089 | 24 | #include "cpu_loop-common.h" |
2113aed6 | 25 | #include "signal-common.h" |
cd71c089 | 26 | |
c37dcb4f LV |
27 | void cpu_loop(CPUSH4State *env) |
28 | { | |
dad1c8ec | 29 | CPUState *cs = env_cpu(env); |
c37dcb4f LV |
30 | int trapnr, ret; |
31 | target_siginfo_t info; | |
32 | ||
33 | while (1) { | |
34 | bool arch_interrupt = true; | |
35 | ||
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 0x160: | |
43 | env->pc += 2; | |
44 | ret = do_syscall(env, | |
45 | env->gregs[3], | |
46 | env->gregs[4], | |
47 | env->gregs[5], | |
48 | env->gregs[6], | |
49 | env->gregs[7], | |
50 | env->gregs[0], | |
51 | env->gregs[1], | |
52 | 0, 0); | |
af254a27 | 53 | if (ret == -QEMU_ERESTARTSYS) { |
c37dcb4f | 54 | env->pc -= 2; |
57a0c938 | 55 | } else if (ret != -QEMU_ESIGRETURN) { |
c37dcb4f LV |
56 | env->gregs[0] = ret; |
57 | } | |
58 | break; | |
59 | case EXCP_INTERRUPT: | |
60 | /* just indicate that signals should be handled asap */ | |
61 | break; | |
62 | case EXCP_DEBUG: | |
b10089a1 PM |
63 | info.si_signo = TARGET_SIGTRAP; |
64 | info.si_errno = 0; | |
65 | info.si_code = TARGET_TRAP_BRKPT; | |
66 | queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); | |
c37dcb4f | 67 | break; |
c37dcb4f LV |
68 | case EXCP_ATOMIC: |
69 | cpu_exec_step_atomic(cs); | |
70 | arch_interrupt = false; | |
71 | break; | |
72 | default: | |
84ca4fa9 | 73 | fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr); |
90c84c56 | 74 | cpu_dump_state(cs, stderr, 0); |
c37dcb4f LV |
75 | exit(EXIT_FAILURE); |
76 | } | |
77 | process_pending_signals (env); | |
78 | ||
79 | /* Most of the traps imply an exception or interrupt, which | |
80 | implies an REI instruction has been executed. Which means | |
81 | that LDST (aka LOK_ADDR) should be cleared. But there are | |
82 | a few exceptions for traps internal to QEMU. */ | |
83 | if (arch_interrupt) { | |
84 | env->lock_addr = -1; | |
85 | } | |
86 | } | |
87 | } | |
88 | ||
cd71c089 LV |
89 | void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) |
90 | { | |
c37dcb4f LV |
91 | int i; |
92 | ||
93 | for(i = 0; i < 16; i++) { | |
94 | env->gregs[i] = regs->regs[i]; | |
95 | } | |
96 | env->pc = regs->pc; | |
cd71c089 | 97 | } |