linux-user: Add support for btrfs ioctls used to manage quota
[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 "cpu_loop-common.h"
24
25 void cpu_loop(CPUM68KState *env)
26 {
27 CPUState *cs = env_cpu(env);
28 int trapnr;
29 unsigned int n;
30 target_siginfo_t info;
31
32 for(;;) {
33 cpu_exec_start(cs);
34 trapnr = cpu_exec(cs);
35 cpu_exec_end(cs);
36 process_queued_cpu_work(cs);
37
38 switch(trapnr) {
39 case EXCP_HALT_INSN:
40 /* Semihosing syscall. */
41 env->pc += 4;
42 do_m68k_semihosting(env, env->dregs[0]);
43 break;
44 case EXCP_ILLEGAL:
45 case EXCP_LINEA:
46 case EXCP_LINEF:
47 info.si_signo = TARGET_SIGILL;
48 info.si_errno = 0;
49 info.si_code = TARGET_ILL_ILLOPN;
50 info._sifields._sigfault._addr = env->pc;
51 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
52 break;
53 case EXCP_CHK:
54 info.si_signo = TARGET_SIGFPE;
55 info.si_errno = 0;
56 info.si_code = TARGET_FPE_INTOVF;
57 info._sifields._sigfault._addr = env->pc;
58 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
59 break;
60 case EXCP_DIV0:
61 info.si_signo = TARGET_SIGFPE;
62 info.si_errno = 0;
63 info.si_code = TARGET_FPE_INTDIV;
64 info._sifields._sigfault._addr = env->pc;
65 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
66 break;
67 case EXCP_TRAP0:
68 {
69 abi_long ret;
70 n = env->dregs[0];
71 env->pc += 2;
72 ret = do_syscall(env,
73 n,
74 env->dregs[1],
75 env->dregs[2],
76 env->dregs[3],
77 env->dregs[4],
78 env->dregs[5],
79 env->aregs[0],
80 0, 0);
81 if (ret == -TARGET_ERESTARTSYS) {
82 env->pc -= 2;
83 } else if (ret != -TARGET_QEMU_ESIGRETURN) {
84 env->dregs[0] = ret;
85 }
86 }
87 break;
88 case EXCP_INTERRUPT:
89 /* just indicate that signals should be handled asap */
90 break;
91 case EXCP_ACCESS:
92 {
93 info.si_signo = TARGET_SIGSEGV;
94 info.si_errno = 0;
95 /* XXX: check env->error_code */
96 info.si_code = TARGET_SEGV_MAPERR;
97 info._sifields._sigfault._addr = env->mmu.ar;
98 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
99 }
100 break;
101 case EXCP_DEBUG:
102 info.si_signo = TARGET_SIGTRAP;
103 info.si_errno = 0;
104 info.si_code = TARGET_TRAP_BRKPT;
105 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
106 break;
107 case EXCP_ATOMIC:
108 cpu_exec_step_atomic(cs);
109 break;
110 default:
111 EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
112 abort();
113 }
114 process_pending_signals(env);
115 }
116 }
117
118 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
119 {
120 CPUState *cpu = env_cpu(env);
121 TaskState *ts = cpu->opaque;
122 struct image_info *info = ts->info;
123
124 env->pc = regs->pc;
125 env->dregs[0] = regs->d0;
126 env->dregs[1] = regs->d1;
127 env->dregs[2] = regs->d2;
128 env->dregs[3] = regs->d3;
129 env->dregs[4] = regs->d4;
130 env->dregs[5] = regs->d5;
131 env->dregs[6] = regs->d6;
132 env->dregs[7] = regs->d7;
133 env->aregs[0] = regs->a0;
134 env->aregs[1] = regs->a1;
135 env->aregs[2] = regs->a2;
136 env->aregs[3] = regs->a3;
137 env->aregs[4] = regs->a4;
138 env->aregs[5] = regs->a5;
139 env->aregs[6] = regs->a6;
140 env->aregs[7] = regs->usp;
141 env->sr = regs->sr;
142
143 ts->stack_base = info->start_stack;
144 ts->heap_base = info->brk;
145 /* This will be filled in on the first SYS_HEAPINFO call. */
146 ts->heap_limit = 0;
147 }