Merge tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier...
[qemu.git] / linux-user / m68k / cpu_loop.c
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 "user-internals.h"
24 #include "cpu_loop-common.h"
25 #include "signal-common.h"
26
27 void cpu_loop(CPUM68KState *env)
28 {
29 CPUState *cs = env_cpu(env);
30 int trapnr;
31 unsigned int n;
32 target_siginfo_t info;
33
34 for(;;) {
35 cpu_exec_start(cs);
36 trapnr = cpu_exec(cs);
37 cpu_exec_end(cs);
38 process_queued_cpu_work(cs);
39
40 switch(trapnr) {
41 case EXCP_HALT_INSN:
42 /* Semihosing syscall. */
43 env->pc += 4;
44 do_m68k_semihosting(env, env->dregs[0]);
45 break;
46 case EXCP_ILLEGAL:
47 case EXCP_LINEA:
48 case EXCP_LINEF:
49 info.si_signo = TARGET_SIGILL;
50 info.si_errno = 0;
51 info.si_code = TARGET_ILL_ILLOPN;
52 info._sifields._sigfault._addr = env->pc;
53 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
54 break;
55 case EXCP_CHK:
56 info.si_signo = TARGET_SIGFPE;
57 info.si_errno = 0;
58 info.si_code = TARGET_FPE_INTOVF;
59 info._sifields._sigfault._addr = env->pc;
60 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
61 break;
62 case EXCP_DIV0:
63 info.si_signo = TARGET_SIGFPE;
64 info.si_errno = 0;
65 info.si_code = TARGET_FPE_INTDIV;
66 info._sifields._sigfault._addr = env->pc;
67 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
68 break;
69 case EXCP_TRAP0:
70 {
71 abi_long ret;
72 n = env->dregs[0];
73 env->pc += 2;
74 ret = do_syscall(env,
75 n,
76 env->dregs[1],
77 env->dregs[2],
78 env->dregs[3],
79 env->dregs[4],
80 env->dregs[5],
81 env->aregs[0],
82 0, 0);
83 if (ret == -TARGET_ERESTARTSYS) {
84 env->pc -= 2;
85 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
86 env->dregs[0] = ret;
87 }
88 }
89 break;
90 case EXCP_INTERRUPT:
91 /* just indicate that signals should be handled asap */
92 break;
93 case EXCP_DEBUG:
94 info.si_signo = TARGET_SIGTRAP;
95 info.si_errno = 0;
96 info.si_code = TARGET_TRAP_BRKPT;
97 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
98 break;
99 case EXCP_ATOMIC:
100 cpu_exec_step_atomic(cs);
101 break;
102 default:
103 EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
104 abort();
105 }
106 process_pending_signals(env);
107 }
108 }
109
110 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
111 {
112 CPUState *cpu = env_cpu(env);
113 TaskState *ts = cpu->opaque;
114 struct image_info *info = ts->info;
115
116 env->pc = regs->pc;
117 env->dregs[0] = regs->d0;
118 env->dregs[1] = regs->d1;
119 env->dregs[2] = regs->d2;
120 env->dregs[3] = regs->d3;
121 env->dregs[4] = regs->d4;
122 env->dregs[5] = regs->d5;
123 env->dregs[6] = regs->d6;
124 env->dregs[7] = regs->d7;
125 env->aregs[0] = regs->a0;
126 env->aregs[1] = regs->a1;
127 env->aregs[2] = regs->a2;
128 env->aregs[3] = regs->a3;
129 env->aregs[4] = regs->a4;
130 env->aregs[5] = regs->a5;
131 env->aregs[6] = regs->a6;
132 env->aregs[7] = regs->usp;
133 env->sr = regs->sr;
134
135 ts->stack_base = info->start_stack;
136 ts->heap_base = info->brk;
137 /* This will be filled in on the first SYS_HEAPINFO call. */
138 ts->heap_limit = 0;
139 }