1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* qemu user cpu loop
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu.h"
#include "user-internals.h"
#include "cpu_loop-common.h"
#include "signal-common.h"
void cpu_loop(CPUOpenRISCState *env)
{
CPUState *cs = env_cpu(env);
int trapnr;
abi_long ret;
target_siginfo_t info;
for (;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_SYSCALL:
env->pc += 4; /* 0xc00; */
ret = do_syscall(env,
cpu_get_gpr(env, 11), /* return value */
cpu_get_gpr(env, 3), /* r3 - r7 are params */
cpu_get_gpr(env, 4),
cpu_get_gpr(env, 5),
cpu_get_gpr(env, 6),
cpu_get_gpr(env, 7),
cpu_get_gpr(env, 8), 0, 0);
if (ret == -QEMU_ERESTARTSYS) {
env->pc -= 4;
} else if (ret != -QEMU_ESIGRETURN) {
cpu_set_gpr(env, 11, ret);
}
break;
case EXCP_ALIGN:
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_BUS_ADRALN;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ILLEGAL:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPC;
info._sifields._sigfault._addr = env->pc;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_INTERRUPT:
/* We processed the pending cpu work above. */
break;
case EXCP_DEBUG:
info.si_signo = TARGET_SIGTRAP;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
break;
case EXCP_ATOMIC:
cpu_exec_step_atomic(cs);
break;
case EXCP_RANGE:
/* Requires SR.OVE set, which linux-user won't do. */
cpu_abort(cs, "Unexpected RANGE exception");
case EXCP_FPE:
/*
* Requires FPSCR.FPEE set. Writes to FPSCR from usermode not
* yet enabled in kernel ABI, so linux-user does not either.
*/
cpu_abort(cs, "Unexpected FPE exception");
default:
g_assert_not_reached();
}
process_pending_signals(env);
}
}
void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
{
int i;
for (i = 0; i < 32; i++) {
cpu_set_gpr(env, i, regs->gpr[i]);
}
env->pc = regs->pc;
cpu_set_sr(env, regs->sr);
}
|
