xref: /qemu/linux-user/m68k/cpu_loop.c (revision a8d2532645cf5ce4f75981f81dfe363efc35d05c)
1cd71c089SLaurent Vivier /*
2cd71c089SLaurent Vivier  *  qemu user cpu loop
3cd71c089SLaurent Vivier  *
4cd71c089SLaurent Vivier  *  Copyright (c) 2003-2008 Fabrice Bellard
5cd71c089SLaurent Vivier  *
6cd71c089SLaurent Vivier  *  This program is free software; you can redistribute it and/or modify
7cd71c089SLaurent Vivier  *  it under the terms of the GNU General Public License as published by
8cd71c089SLaurent Vivier  *  the Free Software Foundation; either version 2 of the License, or
9cd71c089SLaurent Vivier  *  (at your option) any later version.
10cd71c089SLaurent Vivier  *
11cd71c089SLaurent Vivier  *  This program is distributed in the hope that it will be useful,
12cd71c089SLaurent Vivier  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13cd71c089SLaurent Vivier  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14cd71c089SLaurent Vivier  *  GNU General Public License for more details.
15cd71c089SLaurent Vivier  *
16cd71c089SLaurent Vivier  *  You should have received a copy of the GNU General Public License
17cd71c089SLaurent Vivier  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
18cd71c089SLaurent Vivier  */
19cd71c089SLaurent Vivier 
20cd71c089SLaurent Vivier #include "qemu/osdep.h"
21*a8d25326SMarkus Armbruster #include "qemu-common.h"
22cd71c089SLaurent Vivier #include "qemu.h"
23cd71c089SLaurent Vivier #include "cpu_loop-common.h"
24cd71c089SLaurent Vivier 
25ff9803b1SLaurent Vivier void cpu_loop(CPUM68KState *env)
26ff9803b1SLaurent Vivier {
27a8d92fd8SRichard Henderson     CPUState *cs = env_cpu(env);
28ff9803b1SLaurent Vivier     int trapnr;
29ff9803b1SLaurent Vivier     unsigned int n;
30ff9803b1SLaurent Vivier     target_siginfo_t info;
31ff9803b1SLaurent Vivier     TaskState *ts = cs->opaque;
32ff9803b1SLaurent Vivier 
33ff9803b1SLaurent Vivier     for(;;) {
34ff9803b1SLaurent Vivier         cpu_exec_start(cs);
35ff9803b1SLaurent Vivier         trapnr = cpu_exec(cs);
36ff9803b1SLaurent Vivier         cpu_exec_end(cs);
37ff9803b1SLaurent Vivier         process_queued_cpu_work(cs);
38ff9803b1SLaurent Vivier 
39ff9803b1SLaurent Vivier         switch(trapnr) {
40ff9803b1SLaurent Vivier         case EXCP_ILLEGAL:
41ff9803b1SLaurent Vivier             {
42ff9803b1SLaurent Vivier                 if (ts->sim_syscalls) {
43ff9803b1SLaurent Vivier                     uint16_t nr;
44ff9803b1SLaurent Vivier                     get_user_u16(nr, env->pc + 2);
45ff9803b1SLaurent Vivier                     env->pc += 4;
46ff9803b1SLaurent Vivier                     do_m68k_simcall(env, nr);
47ff9803b1SLaurent Vivier                 } else {
48ff9803b1SLaurent Vivier                     goto do_sigill;
49ff9803b1SLaurent Vivier                 }
50ff9803b1SLaurent Vivier             }
51ff9803b1SLaurent Vivier             break;
52ff9803b1SLaurent Vivier         case EXCP_HALT_INSN:
53ff9803b1SLaurent Vivier             /* Semihosing syscall.  */
54ff9803b1SLaurent Vivier             env->pc += 4;
55ff9803b1SLaurent Vivier             do_m68k_semihosting(env, env->dregs[0]);
56ff9803b1SLaurent Vivier             break;
57ff9803b1SLaurent Vivier         case EXCP_LINEA:
58ff9803b1SLaurent Vivier         case EXCP_LINEF:
59ff9803b1SLaurent Vivier         do_sigill:
60ff9803b1SLaurent Vivier             info.si_signo = TARGET_SIGILL;
61ff9803b1SLaurent Vivier             info.si_errno = 0;
62ff9803b1SLaurent Vivier             info.si_code = TARGET_ILL_ILLOPN;
63ff9803b1SLaurent Vivier             info._sifields._sigfault._addr = env->pc;
64ff9803b1SLaurent Vivier             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
65ff9803b1SLaurent Vivier             break;
66ff9803b1SLaurent Vivier         case EXCP_CHK:
67ff9803b1SLaurent Vivier             info.si_signo = TARGET_SIGFPE;
68ff9803b1SLaurent Vivier             info.si_errno = 0;
69ff9803b1SLaurent Vivier             info.si_code = TARGET_FPE_INTOVF;
70ff9803b1SLaurent Vivier             info._sifields._sigfault._addr = env->pc;
71ff9803b1SLaurent Vivier             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
72ff9803b1SLaurent Vivier             break;
73ff9803b1SLaurent Vivier         case EXCP_DIV0:
74ff9803b1SLaurent Vivier             info.si_signo = TARGET_SIGFPE;
75ff9803b1SLaurent Vivier             info.si_errno = 0;
76ff9803b1SLaurent Vivier             info.si_code = TARGET_FPE_INTDIV;
77ff9803b1SLaurent Vivier             info._sifields._sigfault._addr = env->pc;
78ff9803b1SLaurent Vivier             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
79ff9803b1SLaurent Vivier             break;
80ff9803b1SLaurent Vivier         case EXCP_TRAP0:
81ff9803b1SLaurent Vivier             {
82ff9803b1SLaurent Vivier                 abi_long ret;
83ff9803b1SLaurent Vivier                 ts->sim_syscalls = 0;
84ff9803b1SLaurent Vivier                 n = env->dregs[0];
85ff9803b1SLaurent Vivier                 env->pc += 2;
86ff9803b1SLaurent Vivier                 ret = do_syscall(env,
87ff9803b1SLaurent Vivier                                  n,
88ff9803b1SLaurent Vivier                                  env->dregs[1],
89ff9803b1SLaurent Vivier                                  env->dregs[2],
90ff9803b1SLaurent Vivier                                  env->dregs[3],
91ff9803b1SLaurent Vivier                                  env->dregs[4],
92ff9803b1SLaurent Vivier                                  env->dregs[5],
93ff9803b1SLaurent Vivier                                  env->aregs[0],
94ff9803b1SLaurent Vivier                                  0, 0);
95ff9803b1SLaurent Vivier                 if (ret == -TARGET_ERESTARTSYS) {
96ff9803b1SLaurent Vivier                     env->pc -= 2;
97ff9803b1SLaurent Vivier                 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
98ff9803b1SLaurent Vivier                     env->dregs[0] = ret;
99ff9803b1SLaurent Vivier                 }
100ff9803b1SLaurent Vivier             }
101ff9803b1SLaurent Vivier             break;
102ff9803b1SLaurent Vivier         case EXCP_INTERRUPT:
103ff9803b1SLaurent Vivier             /* just indicate that signals should be handled asap */
104ff9803b1SLaurent Vivier             break;
105ff9803b1SLaurent Vivier         case EXCP_ACCESS:
106ff9803b1SLaurent Vivier             {
107ff9803b1SLaurent Vivier                 info.si_signo = TARGET_SIGSEGV;
108ff9803b1SLaurent Vivier                 info.si_errno = 0;
109ff9803b1SLaurent Vivier                 /* XXX: check env->error_code */
110ff9803b1SLaurent Vivier                 info.si_code = TARGET_SEGV_MAPERR;
111ff9803b1SLaurent Vivier                 info._sifields._sigfault._addr = env->mmu.ar;
112ff9803b1SLaurent Vivier                 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
113ff9803b1SLaurent Vivier             }
114ff9803b1SLaurent Vivier             break;
115ff9803b1SLaurent Vivier         case EXCP_DEBUG:
116b10089a1SPeter Maydell             info.si_signo = TARGET_SIGTRAP;
117ff9803b1SLaurent Vivier             info.si_errno = 0;
118ff9803b1SLaurent Vivier             info.si_code = TARGET_TRAP_BRKPT;
119ff9803b1SLaurent Vivier             queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
120ff9803b1SLaurent Vivier             break;
121ff9803b1SLaurent Vivier         case EXCP_ATOMIC:
122ff9803b1SLaurent Vivier             cpu_exec_step_atomic(cs);
123ff9803b1SLaurent Vivier             break;
124ff9803b1SLaurent Vivier         default:
125ff9803b1SLaurent Vivier             EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
126ff9803b1SLaurent Vivier             abort();
127ff9803b1SLaurent Vivier         }
128ff9803b1SLaurent Vivier         process_pending_signals(env);
129ff9803b1SLaurent Vivier     }
130ff9803b1SLaurent Vivier }
131ff9803b1SLaurent Vivier 
132cd71c089SLaurent Vivier void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
133cd71c089SLaurent Vivier {
13429a0af61SRichard Henderson     CPUState *cpu = env_cpu(env);
135ff9803b1SLaurent Vivier     TaskState *ts = cpu->opaque;
136ff9803b1SLaurent Vivier     struct image_info *info = ts->info;
137ff9803b1SLaurent Vivier 
138ff9803b1SLaurent Vivier     env->pc = regs->pc;
139ff9803b1SLaurent Vivier     env->dregs[0] = regs->d0;
140ff9803b1SLaurent Vivier     env->dregs[1] = regs->d1;
141ff9803b1SLaurent Vivier     env->dregs[2] = regs->d2;
142ff9803b1SLaurent Vivier     env->dregs[3] = regs->d3;
143ff9803b1SLaurent Vivier     env->dregs[4] = regs->d4;
144ff9803b1SLaurent Vivier     env->dregs[5] = regs->d5;
145ff9803b1SLaurent Vivier     env->dregs[6] = regs->d6;
146ff9803b1SLaurent Vivier     env->dregs[7] = regs->d7;
147ff9803b1SLaurent Vivier     env->aregs[0] = regs->a0;
148ff9803b1SLaurent Vivier     env->aregs[1] = regs->a1;
149ff9803b1SLaurent Vivier     env->aregs[2] = regs->a2;
150ff9803b1SLaurent Vivier     env->aregs[3] = regs->a3;
151ff9803b1SLaurent Vivier     env->aregs[4] = regs->a4;
152ff9803b1SLaurent Vivier     env->aregs[5] = regs->a5;
153ff9803b1SLaurent Vivier     env->aregs[6] = regs->a6;
154ff9803b1SLaurent Vivier     env->aregs[7] = regs->usp;
155ff9803b1SLaurent Vivier     env->sr = regs->sr;
156ff9803b1SLaurent Vivier 
157ff9803b1SLaurent Vivier     ts->sim_syscalls = 1;
158ff9803b1SLaurent Vivier     ts->stack_base = info->start_stack;
159ff9803b1SLaurent Vivier     ts->heap_base = info->brk;
160ff9803b1SLaurent Vivier     /* This will be filled in on the first SYS_HEAPINFO call.  */
161ff9803b1SLaurent Vivier     ts->heap_limit = 0;
162cd71c089SLaurent Vivier }
163