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-common.h"
22#include "qemu.h"
23#include "cpu_loop-common.h"
24
25void cpu_loop(CPUCRISState *env)
26{
27 CPUState *cs = env_cpu(env);
28 int trapnr, ret;
29 target_siginfo_t info;
30
31 while (1) {
32 cpu_exec_start(cs);
33 trapnr = cpu_exec(cs);
34 cpu_exec_end(cs);
35 process_queued_cpu_work(cs);
36
37 switch (trapnr) {
38 case 0xaa:
39 {
40 info.si_signo = TARGET_SIGSEGV;
41 info.si_errno = 0;
42 /* XXX: check env->error_code */
43 info.si_code = TARGET_SEGV_MAPERR;
44 info._sifields._sigfault._addr = env->pregs[PR_EDA];
45 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
46 }
47 break;
48 case EXCP_INTERRUPT:
49 /* just indicate that signals should be handled asap */
50 break;
51 case EXCP_BREAK:
52 ret = do_syscall(env,
53 env->regs[9],
54 env->regs[10],
55 env->regs[11],
56 env->regs[12],
57 env->regs[13],
58 env->pregs[7],
59 env->pregs[11],
60 0, 0);
61 if (ret == -TARGET_ERESTARTSYS) {
62 env->pc -= 2;
63 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
64 env->regs[10] = ret;
65 }
66 break;
67 case EXCP_DEBUG:
68 info.si_signo = TARGET_SIGTRAP;
69 info.si_errno = 0;
70 info.si_code = TARGET_TRAP_BRKPT;
71 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
72 break;
73 case EXCP_ATOMIC:
74 cpu_exec_step_atomic(cs);
75 break;
76 default:
77 fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
78 cpu_dump_state(cs, stderr, 0);
79 exit(EXIT_FAILURE);
80 }
81 process_pending_signals (env);
82 }
83}
84
85void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
86{
87 CPUState *cpu = env_cpu(env);
88 TaskState *ts = cpu->opaque;
89 struct image_info *info = ts->info;
90
91 env->regs[0] = regs->r0;
92 env->regs[1] = regs->r1;
93 env->regs[2] = regs->r2;
94 env->regs[3] = regs->r3;
95 env->regs[4] = regs->r4;
96 env->regs[5] = regs->r5;
97 env->regs[6] = regs->r6;
98 env->regs[7] = regs->r7;
99 env->regs[8] = regs->r8;
100 env->regs[9] = regs->r9;
101 env->regs[10] = regs->r10;
102 env->regs[11] = regs->r11;
103 env->regs[12] = regs->r12;
104 env->regs[13] = regs->r13;
105 env->regs[14] = info->start_stack;
106 env->regs[15] = regs->acr;
107 env->pc = regs->erp;
108}
109