4 * Copyright (c) 2003-2008 Fabrice Bellard
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.
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.
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/>.
20 #include "qemu/osdep.h"
22 #include "cpu_loop-common.h"
24 void cpu_loop(CPUMBState
*env
)
26 CPUState
*cs
= CPU(mb_env_get_cpu(env
));
28 target_siginfo_t info
;
32 trapnr
= cpu_exec(cs
);
34 process_queued_cpu_work(cs
);
39 info
.si_signo
= TARGET_SIGSEGV
;
41 /* XXX: check env->error_code */
42 info
.si_code
= TARGET_SEGV_MAPERR
;
43 info
._sifields
._sigfault
._addr
= 0;
44 queue_signal(env
, info
.si_signo
, QEMU_SI_FAULT
, &info
);
48 /* just indicate that signals should be handled asap */
51 /* Return address is 4 bytes after the call. */
53 env
->sregs
[SR_PC
] = env
->regs
[14];
63 if (ret
== -TARGET_ERESTARTSYS
) {
64 /* Wind back to before the syscall. */
65 env
->sregs
[SR_PC
] -= 4;
66 } else if (ret
!= -TARGET_QEMU_ESIGRETURN
) {
69 /* All syscall exits result in guest r14 being equal to the
70 * PC we return to, because the kernel syscall exit "rtbd" does
71 * this. (This is true even for sigreturn(); note that r14 is
72 * not a userspace-usable register, as the kernel may clobber it
75 env
->regs
[14] = env
->sregs
[SR_PC
];
78 env
->regs
[17] = env
->sregs
[SR_PC
] + 4;
79 if (env
->iflags
& D_FLAG
) {
80 env
->sregs
[SR_ESR
] |= 1 << 12;
81 env
->sregs
[SR_PC
] -= 4;
82 /* FIXME: if branch was immed, replay the imm as well. */
85 env
->iflags
&= ~(IMM_FLAG
| D_FLAG
);
87 switch (env
->sregs
[SR_ESR
] & 31) {
89 info
.si_signo
= TARGET_SIGFPE
;
91 info
.si_code
= TARGET_FPE_FLTDIV
;
92 info
._sifields
._sigfault
._addr
= 0;
93 queue_signal(env
, info
.si_signo
, QEMU_SI_FAULT
, &info
);
96 info
.si_signo
= TARGET_SIGFPE
;
98 if (env
->sregs
[SR_FSR
] & FSR_IO
) {
99 info
.si_code
= TARGET_FPE_FLTINV
;
101 if (env
->sregs
[SR_FSR
] & FSR_DZ
) {
102 info
.si_code
= TARGET_FPE_FLTDIV
;
104 info
._sifields
._sigfault
._addr
= 0;
105 queue_signal(env
, info
.si_signo
, QEMU_SI_FAULT
, &info
);
108 fprintf(stderr
, "Unhandled hw-exception: 0x%" PRIx64
"\n",
109 env
->sregs
[SR_ESR
] & ESR_EC_MASK
);
110 cpu_dump_state(cs
, stderr
, fprintf
, 0);
116 info
.si_signo
= TARGET_SIGTRAP
;
118 info
.si_code
= TARGET_TRAP_BRKPT
;
119 queue_signal(env
, info
.si_signo
, QEMU_SI_FAULT
, &info
);
122 cpu_exec_step_atomic(cs
);
125 fprintf(stderr
, "Unhandled trap: 0x%x\n", trapnr
);
126 cpu_dump_state(cs
, stderr
, fprintf
, 0);
129 process_pending_signals (env
);
133 void target_cpu_copy_regs(CPUArchState
*env
, struct target_pt_regs
*regs
)
135 env
->regs
[0] = regs
->r0
;
136 env
->regs
[1] = regs
->r1
;
137 env
->regs
[2] = regs
->r2
;
138 env
->regs
[3] = regs
->r3
;
139 env
->regs
[4] = regs
->r4
;
140 env
->regs
[5] = regs
->r5
;
141 env
->regs
[6] = regs
->r6
;
142 env
->regs
[7] = regs
->r7
;
143 env
->regs
[8] = regs
->r8
;
144 env
->regs
[9] = regs
->r9
;
145 env
->regs
[10] = regs
->r10
;
146 env
->regs
[11] = regs
->r11
;
147 env
->regs
[12] = regs
->r12
;
148 env
->regs
[13] = regs
->r13
;
149 env
->regs
[14] = regs
->r14
;
150 env
->regs
[15] = regs
->r15
;
151 env
->regs
[16] = regs
->r16
;
152 env
->regs
[17] = regs
->r17
;
153 env
->regs
[18] = regs
->r18
;
154 env
->regs
[19] = regs
->r19
;
155 env
->regs
[20] = regs
->r20
;
156 env
->regs
[21] = regs
->r21
;
157 env
->regs
[22] = regs
->r22
;
158 env
->regs
[23] = regs
->r23
;
159 env
->regs
[24] = regs
->r24
;
160 env
->regs
[25] = regs
->r25
;
161 env
->regs
[26] = regs
->r26
;
162 env
->regs
[27] = regs
->r27
;
163 env
->regs
[28] = regs
->r28
;
164 env
->regs
[29] = regs
->r29
;
165 env
->regs
[30] = regs
->r30
;
166 env
->regs
[31] = regs
->r31
;
167 env
->sregs
[SR_PC
] = regs
->pc
;