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Merge tag 'pull-maintainer-may24-160524-2' of https://gitlab.com/stsquad/qemu into...
[mirror_qemu.git] / linux-user / mips / 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 #include "elf.h"
25
26 # ifdef TARGET_ABI_MIPSO32
27 # define MIPS_SYS(name, args) args,
28 static const uint8_t mips_syscall_args[] = {
29 MIPS_SYS(sys_syscall , 8) /* 4000 */
30 MIPS_SYS(sys_exit , 1)
31 MIPS_SYS(sys_fork , 0)
32 MIPS_SYS(sys_read , 3)
33 MIPS_SYS(sys_write , 3)
34 MIPS_SYS(sys_open , 3) /* 4005 */
35 MIPS_SYS(sys_close , 1)
36 MIPS_SYS(sys_waitpid , 3)
37 MIPS_SYS(sys_creat , 2)
38 MIPS_SYS(sys_link , 2)
39 MIPS_SYS(sys_unlink , 1) /* 4010 */
40 MIPS_SYS(sys_execve , 0)
41 MIPS_SYS(sys_chdir , 1)
42 MIPS_SYS(sys_time , 1)
43 MIPS_SYS(sys_mknod , 3)
44 MIPS_SYS(sys_chmod , 2) /* 4015 */
45 MIPS_SYS(sys_lchown , 3)
46 MIPS_SYS(sys_ni_syscall , 0)
47 MIPS_SYS(sys_ni_syscall , 0) /* was sys_stat */
48 MIPS_SYS(sys_lseek , 3)
49 MIPS_SYS(sys_getpid , 0) /* 4020 */
50 MIPS_SYS(sys_mount , 5)
51 MIPS_SYS(sys_umount , 1)
52 MIPS_SYS(sys_setuid , 1)
53 MIPS_SYS(sys_getuid , 0)
54 MIPS_SYS(sys_stime , 1) /* 4025 */
55 MIPS_SYS(sys_ptrace , 4)
56 MIPS_SYS(sys_alarm , 1)
57 MIPS_SYS(sys_ni_syscall , 0) /* was sys_fstat */
58 MIPS_SYS(sys_pause , 0)
59 MIPS_SYS(sys_utime , 2) /* 4030 */
60 MIPS_SYS(sys_ni_syscall , 0)
61 MIPS_SYS(sys_ni_syscall , 0)
62 MIPS_SYS(sys_access , 2)
63 MIPS_SYS(sys_nice , 1)
64 MIPS_SYS(sys_ni_syscall , 0) /* 4035 */
65 MIPS_SYS(sys_sync , 0)
66 MIPS_SYS(sys_kill , 2)
67 MIPS_SYS(sys_rename , 2)
68 MIPS_SYS(sys_mkdir , 2)
69 MIPS_SYS(sys_rmdir , 1) /* 4040 */
70 MIPS_SYS(sys_dup , 1)
71 MIPS_SYS(sys_pipe , 0)
72 MIPS_SYS(sys_times , 1)
73 MIPS_SYS(sys_ni_syscall , 0)
74 MIPS_SYS(sys_brk , 1) /* 4045 */
75 MIPS_SYS(sys_setgid , 1)
76 MIPS_SYS(sys_getgid , 0)
77 MIPS_SYS(sys_ni_syscall , 0) /* was signal(2) */
78 MIPS_SYS(sys_geteuid , 0)
79 MIPS_SYS(sys_getegid , 0) /* 4050 */
80 MIPS_SYS(sys_acct , 0)
81 MIPS_SYS(sys_umount2 , 2)
82 MIPS_SYS(sys_ni_syscall , 0)
83 MIPS_SYS(sys_ioctl , 3)
84 MIPS_SYS(sys_fcntl , 3) /* 4055 */
85 MIPS_SYS(sys_ni_syscall , 2)
86 MIPS_SYS(sys_setpgid , 2)
87 MIPS_SYS(sys_ni_syscall , 0)
88 MIPS_SYS(sys_olduname , 1)
89 MIPS_SYS(sys_umask , 1) /* 4060 */
90 MIPS_SYS(sys_chroot , 1)
91 MIPS_SYS(sys_ustat , 2)
92 MIPS_SYS(sys_dup2 , 2)
93 MIPS_SYS(sys_getppid , 0)
94 MIPS_SYS(sys_getpgrp , 0) /* 4065 */
95 MIPS_SYS(sys_setsid , 0)
96 MIPS_SYS(sys_sigaction , 3)
97 MIPS_SYS(sys_sgetmask , 0)
98 MIPS_SYS(sys_ssetmask , 1)
99 MIPS_SYS(sys_setreuid , 2) /* 4070 */
100 MIPS_SYS(sys_setregid , 2)
101 MIPS_SYS(sys_sigsuspend , 0)
102 MIPS_SYS(sys_sigpending , 1)
103 MIPS_SYS(sys_sethostname , 2)
104 MIPS_SYS(sys_setrlimit , 2) /* 4075 */
105 MIPS_SYS(sys_getrlimit , 2)
106 MIPS_SYS(sys_getrusage , 2)
107 MIPS_SYS(sys_gettimeofday, 2)
108 MIPS_SYS(sys_settimeofday, 2)
109 MIPS_SYS(sys_getgroups , 2) /* 4080 */
110 MIPS_SYS(sys_setgroups , 2)
111 MIPS_SYS(sys_ni_syscall , 0) /* old_select */
112 MIPS_SYS(sys_symlink , 2)
113 MIPS_SYS(sys_ni_syscall , 0) /* was sys_lstat */
114 MIPS_SYS(sys_readlink , 3) /* 4085 */
115 MIPS_SYS(sys_uselib , 1)
116 MIPS_SYS(sys_swapon , 2)
117 MIPS_SYS(sys_reboot , 3)
118 MIPS_SYS(old_readdir , 3)
119 MIPS_SYS(old_mmap , 6) /* 4090 */
120 MIPS_SYS(sys_munmap , 2)
121 MIPS_SYS(sys_truncate , 2)
122 MIPS_SYS(sys_ftruncate , 2)
123 MIPS_SYS(sys_fchmod , 2)
124 MIPS_SYS(sys_fchown , 3) /* 4095 */
125 MIPS_SYS(sys_getpriority , 2)
126 MIPS_SYS(sys_setpriority , 3)
127 MIPS_SYS(sys_ni_syscall , 0)
128 MIPS_SYS(sys_statfs , 2)
129 MIPS_SYS(sys_fstatfs , 2) /* 4100 */
130 MIPS_SYS(sys_ni_syscall , 0) /* was ioperm(2) */
131 MIPS_SYS(sys_socketcall , 2)
132 MIPS_SYS(sys_syslog , 3)
133 MIPS_SYS(sys_setitimer , 3)
134 MIPS_SYS(sys_getitimer , 2) /* 4105 */
135 MIPS_SYS(sys_newstat , 2)
136 MIPS_SYS(sys_newlstat , 2)
137 MIPS_SYS(sys_newfstat , 2)
138 MIPS_SYS(sys_uname , 1)
139 MIPS_SYS(sys_ni_syscall , 0) /* 4110 was iopl(2) */
140 MIPS_SYS(sys_vhangup , 0)
141 MIPS_SYS(sys_ni_syscall , 0) /* was sys_idle() */
142 MIPS_SYS(sys_ni_syscall , 0) /* was sys_vm86 */
143 MIPS_SYS(sys_wait4 , 4)
144 MIPS_SYS(sys_swapoff , 1) /* 4115 */
145 MIPS_SYS(sys_sysinfo , 1)
146 MIPS_SYS(sys_ipc , 6)
147 MIPS_SYS(sys_fsync , 1)
148 MIPS_SYS(sys_sigreturn , 0)
149 MIPS_SYS(sys_clone , 6) /* 4120 */
150 MIPS_SYS(sys_setdomainname, 2)
151 MIPS_SYS(sys_newuname , 1)
152 MIPS_SYS(sys_ni_syscall , 0) /* sys_modify_ldt */
153 MIPS_SYS(sys_adjtimex , 1)
154 MIPS_SYS(sys_mprotect , 3) /* 4125 */
155 MIPS_SYS(sys_sigprocmask , 3)
156 MIPS_SYS(sys_ni_syscall , 0) /* was create_module */
157 MIPS_SYS(sys_init_module , 5)
158 MIPS_SYS(sys_delete_module, 1)
159 MIPS_SYS(sys_ni_syscall , 0) /* 4130 was get_kernel_syms */
160 MIPS_SYS(sys_quotactl , 0)
161 MIPS_SYS(sys_getpgid , 1)
162 MIPS_SYS(sys_fchdir , 1)
163 MIPS_SYS(sys_bdflush , 2)
164 MIPS_SYS(sys_sysfs , 3) /* 4135 */
165 MIPS_SYS(sys_personality , 1)
166 MIPS_SYS(sys_ni_syscall , 0) /* for afs_syscall */
167 MIPS_SYS(sys_setfsuid , 1)
168 MIPS_SYS(sys_setfsgid , 1)
169 MIPS_SYS(sys_llseek , 5) /* 4140 */
170 MIPS_SYS(sys_getdents , 3)
171 MIPS_SYS(sys_select , 5)
172 MIPS_SYS(sys_flock , 2)
173 MIPS_SYS(sys_msync , 3)
174 MIPS_SYS(sys_readv , 3) /* 4145 */
175 MIPS_SYS(sys_writev , 3)
176 MIPS_SYS(sys_cacheflush , 3)
177 MIPS_SYS(sys_cachectl , 3)
178 MIPS_SYS(sys_sysmips , 4)
179 MIPS_SYS(sys_ni_syscall , 0) /* 4150 */
180 MIPS_SYS(sys_getsid , 1)
181 MIPS_SYS(sys_fdatasync , 0)
182 MIPS_SYS(sys_sysctl , 1)
183 MIPS_SYS(sys_mlock , 2)
184 MIPS_SYS(sys_munlock , 2) /* 4155 */
185 MIPS_SYS(sys_mlockall , 1)
186 MIPS_SYS(sys_munlockall , 0)
187 MIPS_SYS(sys_sched_setparam, 2)
188 MIPS_SYS(sys_sched_getparam, 2)
189 MIPS_SYS(sys_sched_setscheduler, 3) /* 4160 */
190 MIPS_SYS(sys_sched_getscheduler, 1)
191 MIPS_SYS(sys_sched_yield , 0)
192 MIPS_SYS(sys_sched_get_priority_max, 1)
193 MIPS_SYS(sys_sched_get_priority_min, 1)
194 MIPS_SYS(sys_sched_rr_get_interval, 2) /* 4165 */
195 MIPS_SYS(sys_nanosleep, 2)
196 MIPS_SYS(sys_mremap , 5)
197 MIPS_SYS(sys_accept , 3)
198 MIPS_SYS(sys_bind , 3)
199 MIPS_SYS(sys_connect , 3) /* 4170 */
200 MIPS_SYS(sys_getpeername , 3)
201 MIPS_SYS(sys_getsockname , 3)
202 MIPS_SYS(sys_getsockopt , 5)
203 MIPS_SYS(sys_listen , 2)
204 MIPS_SYS(sys_recv , 4) /* 4175 */
205 MIPS_SYS(sys_recvfrom , 6)
206 MIPS_SYS(sys_recvmsg , 3)
207 MIPS_SYS(sys_send , 4)
208 MIPS_SYS(sys_sendmsg , 3)
209 MIPS_SYS(sys_sendto , 6) /* 4180 */
210 MIPS_SYS(sys_setsockopt , 5)
211 MIPS_SYS(sys_shutdown , 2)
212 MIPS_SYS(sys_socket , 3)
213 MIPS_SYS(sys_socketpair , 4)
214 MIPS_SYS(sys_setresuid , 3) /* 4185 */
215 MIPS_SYS(sys_getresuid , 3)
216 MIPS_SYS(sys_ni_syscall , 0) /* was sys_query_module */
217 MIPS_SYS(sys_poll , 3)
218 MIPS_SYS(sys_nfsservctl , 3)
219 MIPS_SYS(sys_setresgid , 3) /* 4190 */
220 MIPS_SYS(sys_getresgid , 3)
221 MIPS_SYS(sys_prctl , 5)
222 MIPS_SYS(sys_rt_sigreturn, 0)
223 MIPS_SYS(sys_rt_sigaction, 4)
224 MIPS_SYS(sys_rt_sigprocmask, 4) /* 4195 */
225 MIPS_SYS(sys_rt_sigpending, 2)
226 MIPS_SYS(sys_rt_sigtimedwait, 4)
227 MIPS_SYS(sys_rt_sigqueueinfo, 3)
228 MIPS_SYS(sys_rt_sigsuspend, 0)
229 MIPS_SYS(sys_pread64 , 6) /* 4200 */
230 MIPS_SYS(sys_pwrite64 , 6)
231 MIPS_SYS(sys_chown , 3)
232 MIPS_SYS(sys_getcwd , 2)
233 MIPS_SYS(sys_capget , 2)
234 MIPS_SYS(sys_capset , 2) /* 4205 */
235 MIPS_SYS(sys_sigaltstack , 2)
236 MIPS_SYS(sys_sendfile , 4)
237 MIPS_SYS(sys_ni_syscall , 0)
238 MIPS_SYS(sys_ni_syscall , 0)
239 MIPS_SYS(sys_mmap2 , 6) /* 4210 */
240 MIPS_SYS(sys_truncate64 , 4)
241 MIPS_SYS(sys_ftruncate64 , 4)
242 MIPS_SYS(sys_stat64 , 2)
243 MIPS_SYS(sys_lstat64 , 2)
244 MIPS_SYS(sys_fstat64 , 2) /* 4215 */
245 MIPS_SYS(sys_pivot_root , 2)
246 MIPS_SYS(sys_mincore , 3)
247 MIPS_SYS(sys_madvise , 3)
248 MIPS_SYS(sys_getdents64 , 3)
249 MIPS_SYS(sys_fcntl64 , 3) /* 4220 */
250 MIPS_SYS(sys_ni_syscall , 0)
251 MIPS_SYS(sys_gettid , 0)
252 MIPS_SYS(sys_readahead , 5)
253 MIPS_SYS(sys_setxattr , 5)
254 MIPS_SYS(sys_lsetxattr , 5) /* 4225 */
255 MIPS_SYS(sys_fsetxattr , 5)
256 MIPS_SYS(sys_getxattr , 4)
257 MIPS_SYS(sys_lgetxattr , 4)
258 MIPS_SYS(sys_fgetxattr , 4)
259 MIPS_SYS(sys_listxattr , 3) /* 4230 */
260 MIPS_SYS(sys_llistxattr , 3)
261 MIPS_SYS(sys_flistxattr , 3)
262 MIPS_SYS(sys_removexattr , 2)
263 MIPS_SYS(sys_lremovexattr, 2)
264 MIPS_SYS(sys_fremovexattr, 2) /* 4235 */
265 MIPS_SYS(sys_tkill , 2)
266 MIPS_SYS(sys_sendfile64 , 5)
267 MIPS_SYS(sys_futex , 6)
268 MIPS_SYS(sys_sched_setaffinity, 3)
269 MIPS_SYS(sys_sched_getaffinity, 3) /* 4240 */
270 MIPS_SYS(sys_io_setup , 2)
271 MIPS_SYS(sys_io_destroy , 1)
272 MIPS_SYS(sys_io_getevents, 5)
273 MIPS_SYS(sys_io_submit , 3)
274 MIPS_SYS(sys_io_cancel , 3) /* 4245 */
275 MIPS_SYS(sys_exit_group , 1)
276 MIPS_SYS(sys_lookup_dcookie, 3)
277 MIPS_SYS(sys_epoll_create, 1)
278 MIPS_SYS(sys_epoll_ctl , 4)
279 MIPS_SYS(sys_epoll_wait , 3) /* 4250 */
280 MIPS_SYS(sys_remap_file_pages, 5)
281 MIPS_SYS(sys_set_tid_address, 1)
282 MIPS_SYS(sys_restart_syscall, 0)
283 MIPS_SYS(sys_fadvise64_64, 7)
284 MIPS_SYS(sys_statfs64 , 3) /* 4255 */
285 MIPS_SYS(sys_fstatfs64 , 2)
286 MIPS_SYS(sys_timer_create, 3)
287 MIPS_SYS(sys_timer_settime, 4)
288 MIPS_SYS(sys_timer_gettime, 2)
289 MIPS_SYS(sys_timer_getoverrun, 1) /* 4260 */
290 MIPS_SYS(sys_timer_delete, 1)
291 MIPS_SYS(sys_clock_settime, 2)
292 MIPS_SYS(sys_clock_gettime, 2)
293 MIPS_SYS(sys_clock_getres, 2)
294 MIPS_SYS(sys_clock_nanosleep, 4) /* 4265 */
295 MIPS_SYS(sys_tgkill , 3)
296 MIPS_SYS(sys_utimes , 2)
297 MIPS_SYS(sys_mbind , 4)
298 MIPS_SYS(sys_ni_syscall , 0) /* sys_get_mempolicy */
299 MIPS_SYS(sys_ni_syscall , 0) /* 4270 sys_set_mempolicy */
300 MIPS_SYS(sys_mq_open , 4)
301 MIPS_SYS(sys_mq_unlink , 1)
302 MIPS_SYS(sys_mq_timedsend, 5)
303 MIPS_SYS(sys_mq_timedreceive, 5)
304 MIPS_SYS(sys_mq_notify , 2) /* 4275 */
305 MIPS_SYS(sys_mq_getsetattr, 3)
306 MIPS_SYS(sys_ni_syscall , 0) /* sys_vserver */
307 MIPS_SYS(sys_waitid , 4)
308 MIPS_SYS(sys_ni_syscall , 0) /* available, was setaltroot */
309 MIPS_SYS(sys_add_key , 5)
310 MIPS_SYS(sys_request_key, 4)
311 MIPS_SYS(sys_keyctl , 5)
312 MIPS_SYS(sys_set_thread_area, 1)
313 MIPS_SYS(sys_inotify_init, 0)
314 MIPS_SYS(sys_inotify_add_watch, 3) /* 4285 */
315 MIPS_SYS(sys_inotify_rm_watch, 2)
316 MIPS_SYS(sys_migrate_pages, 4)
317 MIPS_SYS(sys_openat, 4)
318 MIPS_SYS(sys_mkdirat, 3)
319 MIPS_SYS(sys_mknodat, 4) /* 4290 */
320 MIPS_SYS(sys_fchownat, 5)
321 MIPS_SYS(sys_futimesat, 3)
322 MIPS_SYS(sys_fstatat64, 4)
323 MIPS_SYS(sys_unlinkat, 3)
324 MIPS_SYS(sys_renameat, 4) /* 4295 */
325 MIPS_SYS(sys_linkat, 5)
326 MIPS_SYS(sys_symlinkat, 3)
327 MIPS_SYS(sys_readlinkat, 4)
328 MIPS_SYS(sys_fchmodat, 3)
329 MIPS_SYS(sys_faccessat, 3) /* 4300 */
330 MIPS_SYS(sys_pselect6, 6)
331 MIPS_SYS(sys_ppoll, 5)
332 MIPS_SYS(sys_unshare, 1)
333 MIPS_SYS(sys_splice, 6)
334 MIPS_SYS(sys_sync_file_range, 7) /* 4305 */
335 MIPS_SYS(sys_tee, 4)
336 MIPS_SYS(sys_vmsplice, 4)
337 MIPS_SYS(sys_move_pages, 6)
338 MIPS_SYS(sys_set_robust_list, 2)
339 MIPS_SYS(sys_get_robust_list, 3) /* 4310 */
340 MIPS_SYS(sys_kexec_load, 4)
341 MIPS_SYS(sys_getcpu, 3)
342 MIPS_SYS(sys_epoll_pwait, 6)
343 MIPS_SYS(sys_ioprio_set, 3)
344 MIPS_SYS(sys_ioprio_get, 2)
345 MIPS_SYS(sys_utimensat, 4)
346 MIPS_SYS(sys_signalfd, 3)
347 MIPS_SYS(sys_ni_syscall, 0) /* was timerfd */
348 MIPS_SYS(sys_eventfd, 1)
349 MIPS_SYS(sys_fallocate, 6) /* 4320 */
350 MIPS_SYS(sys_timerfd_create, 2)
351 MIPS_SYS(sys_timerfd_gettime, 2)
352 MIPS_SYS(sys_timerfd_settime, 4)
353 MIPS_SYS(sys_signalfd4, 4)
354 MIPS_SYS(sys_eventfd2, 2) /* 4325 */
355 MIPS_SYS(sys_epoll_create1, 1)
356 MIPS_SYS(sys_dup3, 3)
357 MIPS_SYS(sys_pipe2, 2)
358 MIPS_SYS(sys_inotify_init1, 1)
359 MIPS_SYS(sys_preadv, 5) /* 4330 */
360 MIPS_SYS(sys_pwritev, 5)
361 MIPS_SYS(sys_rt_tgsigqueueinfo, 4)
362 MIPS_SYS(sys_perf_event_open, 5)
363 MIPS_SYS(sys_accept4, 4)
364 MIPS_SYS(sys_recvmmsg, 5) /* 4335 */
365 MIPS_SYS(sys_fanotify_init, 2)
366 MIPS_SYS(sys_fanotify_mark, 6)
367 MIPS_SYS(sys_prlimit64, 4)
368 MIPS_SYS(sys_name_to_handle_at, 5)
369 MIPS_SYS(sys_open_by_handle_at, 3) /* 4340 */
370 MIPS_SYS(sys_clock_adjtime, 2)
371 MIPS_SYS(sys_syncfs, 1)
372 MIPS_SYS(sys_sendmmsg, 4)
373 MIPS_SYS(sys_setns, 2)
374 MIPS_SYS(sys_process_vm_readv, 6) /* 345 */
375 MIPS_SYS(sys_process_vm_writev, 6)
376 MIPS_SYS(sys_kcmp, 5)
377 MIPS_SYS(sys_finit_module, 3)
378 MIPS_SYS(sys_sched_setattr, 2)
379 MIPS_SYS(sys_sched_getattr, 3) /* 350 */
380 MIPS_SYS(sys_renameat2, 5)
381 MIPS_SYS(sys_seccomp, 3)
382 MIPS_SYS(sys_getrandom, 3)
383 MIPS_SYS(sys_memfd_create, 2)
384 MIPS_SYS(sys_bpf, 3) /* 355 */
385 MIPS_SYS(sys_execveat, 5)
386 MIPS_SYS(sys_userfaultfd, 1)
387 MIPS_SYS(sys_membarrier, 2)
388 MIPS_SYS(sys_mlock2, 3)
389 MIPS_SYS(sys_copy_file_range, 6) /* 360 */
390 MIPS_SYS(sys_preadv2, 6)
391 MIPS_SYS(sys_pwritev2, 6)
392 };
393 # undef MIPS_SYS
394 # endif /* O32 */
395
396 /* Break codes */
397 enum {
398 BRK_OVERFLOW = 6,
399 BRK_DIVZERO = 7
400 };
401
402 static int do_break(CPUMIPSState *env, target_siginfo_t *info,
403 unsigned int code)
404 {
405 int ret = -1;
406
407 switch (code) {
408 case BRK_OVERFLOW:
409 case BRK_DIVZERO:
410 info->si_signo = TARGET_SIGFPE;
411 info->si_errno = 0;
412 info->si_code = (code == BRK_OVERFLOW) ? FPE_INTOVF : FPE_INTDIV;
413 queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
414 ret = 0;
415 break;
416 default:
417 info->si_signo = TARGET_SIGTRAP;
418 info->si_errno = 0;
419 queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
420 ret = 0;
421 break;
422 }
423
424 return ret;
425 }
426
427 void cpu_loop(CPUMIPSState *env)
428 {
429 CPUState *cs = env_cpu(env);
430 target_siginfo_t info;
431 int trapnr;
432 abi_long ret;
433 # ifdef TARGET_ABI_MIPSO32
434 unsigned int syscall_num;
435 # endif
436
437 for(;;) {
438 cpu_exec_start(cs);
439 trapnr = cpu_exec(cs);
440 cpu_exec_end(cs);
441 process_queued_cpu_work(cs);
442
443 switch(trapnr) {
444 case EXCP_SYSCALL:
445 env->active_tc.PC += 4;
446 # ifdef TARGET_ABI_MIPSO32
447 syscall_num = env->active_tc.gpr[2] - 4000;
448 if (syscall_num >= sizeof(mips_syscall_args)) {
449 ret = -TARGET_ENOSYS;
450 } else {
451 int nb_args;
452 abi_ulong sp_reg;
453 abi_ulong arg5 = 0, arg6 = 0, arg7 = 0, arg8 = 0;
454
455 nb_args = mips_syscall_args[syscall_num];
456 sp_reg = env->active_tc.gpr[29];
457 switch (nb_args) {
458 /* these arguments are taken from the stack */
459 case 8:
460 if ((ret = get_user_ual(arg8, sp_reg + 28)) != 0) {
461 goto done_syscall;
462 }
463 case 7:
464 if ((ret = get_user_ual(arg7, sp_reg + 24)) != 0) {
465 goto done_syscall;
466 }
467 case 6:
468 if ((ret = get_user_ual(arg6, sp_reg + 20)) != 0) {
469 goto done_syscall;
470 }
471 case 5:
472 if ((ret = get_user_ual(arg5, sp_reg + 16)) != 0) {
473 goto done_syscall;
474 }
475 default:
476 break;
477 }
478 ret = do_syscall(env, env->active_tc.gpr[2],
479 env->active_tc.gpr[4],
480 env->active_tc.gpr[5],
481 env->active_tc.gpr[6],
482 env->active_tc.gpr[7],
483 arg5, arg6, arg7, arg8);
484 }
485 done_syscall:
486 # else
487 ret = do_syscall(env, env->active_tc.gpr[2],
488 env->active_tc.gpr[4], env->active_tc.gpr[5],
489 env->active_tc.gpr[6], env->active_tc.gpr[7],
490 env->active_tc.gpr[8], env->active_tc.gpr[9],
491 env->active_tc.gpr[10], env->active_tc.gpr[11]);
492 # endif /* O32 */
493 if (ret == -TARGET_ERESTARTSYS) {
494 env->active_tc.PC -= 4;
495 break;
496 }
497 if (ret == -TARGET_QEMU_ESIGRETURN) {
498 /* Returning from a successful sigreturn syscall.
499 Avoid clobbering register state. */
500 break;
501 }
502 if ((abi_ulong)ret >= (abi_ulong)-1133) {
503 env->active_tc.gpr[7] = 1; /* error flag */
504 ret = -ret;
505 } else {
506 env->active_tc.gpr[7] = 0; /* error flag */
507 }
508 env->active_tc.gpr[2] = ret;
509 break;
510 case EXCP_TLBL:
511 case EXCP_TLBS:
512 case EXCP_AdEL:
513 case EXCP_AdES:
514 info.si_signo = TARGET_SIGSEGV;
515 info.si_errno = 0;
516 /* XXX: check env->error_code */
517 info.si_code = TARGET_SEGV_MAPERR;
518 info._sifields._sigfault._addr = env->CP0_BadVAddr;
519 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
520 break;
521 case EXCP_CpU:
522 case EXCP_RI:
523 info.si_signo = TARGET_SIGILL;
524 info.si_errno = 0;
525 info.si_code = 0;
526 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
527 break;
528 case EXCP_INTERRUPT:
529 /* just indicate that signals should be handled asap */
530 break;
531 case EXCP_DEBUG:
532 info.si_signo = TARGET_SIGTRAP;
533 info.si_errno = 0;
534 info.si_code = TARGET_TRAP_BRKPT;
535 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
536 break;
537 case EXCP_DSPDIS:
538 info.si_signo = TARGET_SIGILL;
539 info.si_errno = 0;
540 info.si_code = TARGET_ILL_ILLOPC;
541 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
542 break;
543 case EXCP_FPE:
544 info.si_signo = TARGET_SIGFPE;
545 info.si_errno = 0;
546 info.si_code = TARGET_FPE_FLTUNK;
547 if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_INVALID) {
548 info.si_code = TARGET_FPE_FLTINV;
549 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_DIV0) {
550 info.si_code = TARGET_FPE_FLTDIV;
551 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_OVERFLOW) {
552 info.si_code = TARGET_FPE_FLTOVF;
553 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_UNDERFLOW) {
554 info.si_code = TARGET_FPE_FLTUND;
555 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_INEXACT) {
556 info.si_code = TARGET_FPE_FLTRES;
557 }
558 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
559 break;
560 /* The code below was inspired by the MIPS Linux kernel trap
561 * handling code in arch/mips/kernel/traps.c.
562 */
563 case EXCP_BREAK:
564 {
565 abi_ulong trap_instr;
566 unsigned int code;
567
568 if (env->hflags & MIPS_HFLAG_M16) {
569 if (env->insn_flags & ASE_MICROMIPS) {
570 /* microMIPS mode */
571 ret = get_user_u16(trap_instr, env->active_tc.PC);
572 if (ret != 0) {
573 goto error;
574 }
575
576 if ((trap_instr >> 10) == 0x11) {
577 /* 16-bit instruction */
578 code = trap_instr & 0xf;
579 } else {
580 /* 32-bit instruction */
581 abi_ulong instr_lo;
582
583 ret = get_user_u16(instr_lo,
584 env->active_tc.PC + 2);
585 if (ret != 0) {
586 goto error;
587 }
588 trap_instr = (trap_instr << 16) | instr_lo;
589 code = ((trap_instr >> 6) & ((1 << 20) - 1));
590 /* Unfortunately, microMIPS also suffers from
591 the old assembler bug... */
592 if (code >= (1 << 10)) {
593 code >>= 10;
594 }
595 }
596 } else {
597 /* MIPS16e mode */
598 ret = get_user_u16(trap_instr, env->active_tc.PC);
599 if (ret != 0) {
600 goto error;
601 }
602 code = (trap_instr >> 6) & 0x3f;
603 }
604 } else {
605 ret = get_user_u32(trap_instr, env->active_tc.PC);
606 if (ret != 0) {
607 goto error;
608 }
609
610 /* As described in the original Linux kernel code, the
611 * below checks on 'code' are to work around an old
612 * assembly bug.
613 */
614 code = ((trap_instr >> 6) & ((1 << 20) - 1));
615 if (code >= (1 << 10)) {
616 code >>= 10;
617 }
618 }
619
620 if (do_break(env, &info, code) != 0) {
621 goto error;
622 }
623 }
624 break;
625 case EXCP_TRAP:
626 {
627 abi_ulong trap_instr;
628 unsigned int code = 0;
629
630 if (env->hflags & MIPS_HFLAG_M16) {
631 /* microMIPS mode */
632 abi_ulong instr[2];
633
634 ret = get_user_u16(instr[0], env->active_tc.PC) ||
635 get_user_u16(instr[1], env->active_tc.PC + 2);
636
637 trap_instr = (instr[0] << 16) | instr[1];
638 } else {
639 ret = get_user_u32(trap_instr, env->active_tc.PC);
640 }
641
642 if (ret != 0) {
643 goto error;
644 }
645
646 /* The immediate versions don't provide a code. */
647 if (!(trap_instr & 0xFC000000)) {
648 if (env->hflags & MIPS_HFLAG_M16) {
649 /* microMIPS mode */
650 code = ((trap_instr >> 12) & ((1 << 4) - 1));
651 } else {
652 code = ((trap_instr >> 6) & ((1 << 10) - 1));
653 }
654 }
655
656 if (do_break(env, &info, code) != 0) {
657 goto error;
658 }
659 }
660 break;
661 case EXCP_ATOMIC:
662 cpu_exec_step_atomic(cs);
663 break;
664 default:
665 error:
666 EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
667 abort();
668 }
669 process_pending_signals(env);
670 }
671 }
672
673 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
674 {
675 CPUState *cpu = env_cpu(env);
676 TaskState *ts = cpu->opaque;
677 struct image_info *info = ts->info;
678 int i;
679
680 struct mode_req {
681 bool single;
682 bool soft;
683 bool fr1;
684 bool frdefault;
685 bool fre;
686 };
687
688 static const struct mode_req fpu_reqs[] = {
689 [MIPS_ABI_FP_ANY] = { true, true, true, true, true },
690 [MIPS_ABI_FP_DOUBLE] = { false, false, false, true, true },
691 [MIPS_ABI_FP_SINGLE] = { true, false, false, false, false },
692 [MIPS_ABI_FP_SOFT] = { false, true, false, false, false },
693 [MIPS_ABI_FP_OLD_64] = { false, false, false, false, false },
694 [MIPS_ABI_FP_XX] = { false, false, true, true, true },
695 [MIPS_ABI_FP_64] = { false, false, true, false, false },
696 [MIPS_ABI_FP_64A] = { false, false, true, false, true }
697 };
698
699 /*
700 * Mode requirements when .MIPS.abiflags is not present in the ELF.
701 * Not present means that everything is acceptable except FR1.
702 */
703 static struct mode_req none_req = { true, true, false, true, true };
704
705 struct mode_req prog_req;
706 struct mode_req interp_req;
707
708 for(i = 0; i < 32; i++) {
709 env->active_tc.gpr[i] = regs->regs[i];
710 }
711 env->active_tc.PC = regs->cp0_epc & ~(target_ulong)1;
712 if (regs->cp0_epc & 1) {
713 env->hflags |= MIPS_HFLAG_M16;
714 }
715
716 #ifdef TARGET_ABI_MIPSO32
717 # define MAX_FP_ABI MIPS_ABI_FP_64A
718 #else
719 # define MAX_FP_ABI MIPS_ABI_FP_SOFT
720 #endif
721 if ((info->fp_abi > MAX_FP_ABI && info->fp_abi != MIPS_ABI_FP_UNKNOWN)
722 || (info->interp_fp_abi > MAX_FP_ABI &&
723 info->interp_fp_abi != MIPS_ABI_FP_UNKNOWN)) {
724 fprintf(stderr, "qemu: Unexpected FPU mode\n");
725 exit(1);
726 }
727
728 prog_req = (info->fp_abi == MIPS_ABI_FP_UNKNOWN) ? none_req
729 : fpu_reqs[info->fp_abi];
730 interp_req = (info->interp_fp_abi == MIPS_ABI_FP_UNKNOWN) ? none_req
731 : fpu_reqs[info->interp_fp_abi];
732
733 prog_req.single &= interp_req.single;
734 prog_req.soft &= interp_req.soft;
735 prog_req.fr1 &= interp_req.fr1;
736 prog_req.frdefault &= interp_req.frdefault;
737 prog_req.fre &= interp_req.fre;
738
739 bool cpu_has_mips_r2_r6 = env->insn_flags & ISA_MIPS32R2 ||
740 env->insn_flags & ISA_MIPS64R2 ||
741 env->insn_flags & ISA_MIPS32R6 ||
742 env->insn_flags & ISA_MIPS64R6;
743
744 if (prog_req.fre && !prog_req.frdefault && !prog_req.fr1) {
745 env->CP0_Config5 |= (1 << CP0C5_FRE);
746 if (env->active_fpu.fcr0 & (1 << FCR0_FREP)) {
747 env->hflags |= MIPS_HFLAG_FRE;
748 }
749 } else if ((prog_req.fr1 && prog_req.frdefault) ||
750 (prog_req.single && !prog_req.frdefault)) {
751 if ((env->active_fpu.fcr0 & (1 << FCR0_F64)
752 && cpu_has_mips_r2_r6) || prog_req.fr1) {
753 env->CP0_Status |= (1 << CP0St_FR);
754 env->hflags |= MIPS_HFLAG_F64;
755 }
756 } else if (!prog_req.fre && !prog_req.frdefault &&
757 !prog_req.fr1 && !prog_req.single && !prog_req.soft) {
758 fprintf(stderr, "qemu: Can't find a matching FPU mode\n");
759 exit(1);
760 }
761
762 if (env->insn_flags & ISA_NANOMIPS32) {
763 return;
764 }
765 if (((info->elf_flags & EF_MIPS_NAN2008) != 0) !=
766 ((env->active_fpu.fcr31 & (1 << FCR31_NAN2008)) != 0)) {
767 if ((env->active_fpu.fcr31_rw_bitmask &
768 (1 << FCR31_NAN2008)) == 0) {
769 fprintf(stderr, "ELF binary's NaN mode not supported by CPU\n");
770 exit(1);
771 }
772 if ((info->elf_flags & EF_MIPS_NAN2008) != 0) {
773 env->active_fpu.fcr31 |= (1 << FCR31_NAN2008);
774 } else {
775 env->active_fpu.fcr31 &= ~(1 << FCR31_NAN2008);
776 }
777 restore_snan_bit_mode(env);
778 }
779 }
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