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.h"
22 #include "cpu_loop-common.h"
23 #include "elf.h"
24
25 # ifdef TARGET_ABI_MIPSO32
26 # define MIPS_SYS(name, args) args,
27 static const uint8_t mips_syscall_args[] = {
28 MIPS_SYS(sys_syscall , 8) /* 4000 */
29 MIPS_SYS(sys_exit , 1)
30 MIPS_SYS(sys_fork , 0)
31 MIPS_SYS(sys_read , 3)
32 MIPS_SYS(sys_write , 3)
33 MIPS_SYS(sys_open , 3) /* 4005 */
34 MIPS_SYS(sys_close , 1)
35 MIPS_SYS(sys_waitpid , 3)
36 MIPS_SYS(sys_creat , 2)
37 MIPS_SYS(sys_link , 2)
38 MIPS_SYS(sys_unlink , 1) /* 4010 */
39 MIPS_SYS(sys_execve , 0)
40 MIPS_SYS(sys_chdir , 1)
41 MIPS_SYS(sys_time , 1)
42 MIPS_SYS(sys_mknod , 3)
43 MIPS_SYS(sys_chmod , 2) /* 4015 */
44 MIPS_SYS(sys_lchown , 3)
45 MIPS_SYS(sys_ni_syscall , 0)
46 MIPS_SYS(sys_ni_syscall , 0) /* was sys_stat */
47 MIPS_SYS(sys_lseek , 3)
48 MIPS_SYS(sys_getpid , 0) /* 4020 */
49 MIPS_SYS(sys_mount , 5)
50 MIPS_SYS(sys_umount , 1)
51 MIPS_SYS(sys_setuid , 1)
52 MIPS_SYS(sys_getuid , 0)
53 MIPS_SYS(sys_stime , 1) /* 4025 */
54 MIPS_SYS(sys_ptrace , 4)
55 MIPS_SYS(sys_alarm , 1)
56 MIPS_SYS(sys_ni_syscall , 0) /* was sys_fstat */
57 MIPS_SYS(sys_pause , 0)
58 MIPS_SYS(sys_utime , 2) /* 4030 */
59 MIPS_SYS(sys_ni_syscall , 0)
60 MIPS_SYS(sys_ni_syscall , 0)
61 MIPS_SYS(sys_access , 2)
62 MIPS_SYS(sys_nice , 1)
63 MIPS_SYS(sys_ni_syscall , 0) /* 4035 */
64 MIPS_SYS(sys_sync , 0)
65 MIPS_SYS(sys_kill , 2)
66 MIPS_SYS(sys_rename , 2)
67 MIPS_SYS(sys_mkdir , 2)
68 MIPS_SYS(sys_rmdir , 1) /* 4040 */
69 MIPS_SYS(sys_dup , 1)
70 MIPS_SYS(sys_pipe , 0)
71 MIPS_SYS(sys_times , 1)
72 MIPS_SYS(sys_ni_syscall , 0)
73 MIPS_SYS(sys_brk , 1) /* 4045 */
74 MIPS_SYS(sys_setgid , 1)
75 MIPS_SYS(sys_getgid , 0)
76 MIPS_SYS(sys_ni_syscall , 0) /* was signal(2) */
77 MIPS_SYS(sys_geteuid , 0)
78 MIPS_SYS(sys_getegid , 0) /* 4050 */
79 MIPS_SYS(sys_acct , 0)
80 MIPS_SYS(sys_umount2 , 2)
81 MIPS_SYS(sys_ni_syscall , 0)
82 MIPS_SYS(sys_ioctl , 3)
83 MIPS_SYS(sys_fcntl , 3) /* 4055 */
84 MIPS_SYS(sys_ni_syscall , 2)
85 MIPS_SYS(sys_setpgid , 2)
86 MIPS_SYS(sys_ni_syscall , 0)
87 MIPS_SYS(sys_olduname , 1)
88 MIPS_SYS(sys_umask , 1) /* 4060 */
89 MIPS_SYS(sys_chroot , 1)
90 MIPS_SYS(sys_ustat , 2)
91 MIPS_SYS(sys_dup2 , 2)
92 MIPS_SYS(sys_getppid , 0)
93 MIPS_SYS(sys_getpgrp , 0) /* 4065 */
94 MIPS_SYS(sys_setsid , 0)
95 MIPS_SYS(sys_sigaction , 3)
96 MIPS_SYS(sys_sgetmask , 0)
97 MIPS_SYS(sys_ssetmask , 1)
98 MIPS_SYS(sys_setreuid , 2) /* 4070 */
99 MIPS_SYS(sys_setregid , 2)
100 MIPS_SYS(sys_sigsuspend , 0)
101 MIPS_SYS(sys_sigpending , 1)
102 MIPS_SYS(sys_sethostname , 2)
103 MIPS_SYS(sys_setrlimit , 2) /* 4075 */
104 MIPS_SYS(sys_getrlimit , 2)
105 MIPS_SYS(sys_getrusage , 2)
106 MIPS_SYS(sys_gettimeofday, 2)
107 MIPS_SYS(sys_settimeofday, 2)
108 MIPS_SYS(sys_getgroups , 2) /* 4080 */
109 MIPS_SYS(sys_setgroups , 2)
110 MIPS_SYS(sys_ni_syscall , 0) /* old_select */
111 MIPS_SYS(sys_symlink , 2)
112 MIPS_SYS(sys_ni_syscall , 0) /* was sys_lstat */
113 MIPS_SYS(sys_readlink , 3) /* 4085 */
114 MIPS_SYS(sys_uselib , 1)
115 MIPS_SYS(sys_swapon , 2)
116 MIPS_SYS(sys_reboot , 3)
117 MIPS_SYS(old_readdir , 3)
118 MIPS_SYS(old_mmap , 6) /* 4090 */
119 MIPS_SYS(sys_munmap , 2)
120 MIPS_SYS(sys_truncate , 2)
121 MIPS_SYS(sys_ftruncate , 2)
122 MIPS_SYS(sys_fchmod , 2)
123 MIPS_SYS(sys_fchown , 3) /* 4095 */
124 MIPS_SYS(sys_getpriority , 2)
125 MIPS_SYS(sys_setpriority , 3)
126 MIPS_SYS(sys_ni_syscall , 0)
127 MIPS_SYS(sys_statfs , 2)
128 MIPS_SYS(sys_fstatfs , 2) /* 4100 */
129 MIPS_SYS(sys_ni_syscall , 0) /* was ioperm(2) */
130 MIPS_SYS(sys_socketcall , 2)
131 MIPS_SYS(sys_syslog , 3)
132 MIPS_SYS(sys_setitimer , 3)
133 MIPS_SYS(sys_getitimer , 2) /* 4105 */
134 MIPS_SYS(sys_newstat , 2)
135 MIPS_SYS(sys_newlstat , 2)
136 MIPS_SYS(sys_newfstat , 2)
137 MIPS_SYS(sys_uname , 1)
138 MIPS_SYS(sys_ni_syscall , 0) /* 4110 was iopl(2) */
139 MIPS_SYS(sys_vhangup , 0)
140 MIPS_SYS(sys_ni_syscall , 0) /* was sys_idle() */
141 MIPS_SYS(sys_ni_syscall , 0) /* was sys_vm86 */
142 MIPS_SYS(sys_wait4 , 4)
143 MIPS_SYS(sys_swapoff , 1) /* 4115 */
144 MIPS_SYS(sys_sysinfo , 1)
145 MIPS_SYS(sys_ipc , 6)
146 MIPS_SYS(sys_fsync , 1)
147 MIPS_SYS(sys_sigreturn , 0)
148 MIPS_SYS(sys_clone , 6) /* 4120 */
149 MIPS_SYS(sys_setdomainname, 2)
150 MIPS_SYS(sys_newuname , 1)
151 MIPS_SYS(sys_ni_syscall , 0) /* sys_modify_ldt */
152 MIPS_SYS(sys_adjtimex , 1)
153 MIPS_SYS(sys_mprotect , 3) /* 4125 */
154 MIPS_SYS(sys_sigprocmask , 3)
155 MIPS_SYS(sys_ni_syscall , 0) /* was create_module */
156 MIPS_SYS(sys_init_module , 5)
157 MIPS_SYS(sys_delete_module, 1)
158 MIPS_SYS(sys_ni_syscall , 0) /* 4130 was get_kernel_syms */
159 MIPS_SYS(sys_quotactl , 0)
160 MIPS_SYS(sys_getpgid , 1)
161 MIPS_SYS(sys_fchdir , 1)
162 MIPS_SYS(sys_bdflush , 2)
163 MIPS_SYS(sys_sysfs , 3) /* 4135 */
164 MIPS_SYS(sys_personality , 1)
165 MIPS_SYS(sys_ni_syscall , 0) /* for afs_syscall */
166 MIPS_SYS(sys_setfsuid , 1)
167 MIPS_SYS(sys_setfsgid , 1)
168 MIPS_SYS(sys_llseek , 5) /* 4140 */
169 MIPS_SYS(sys_getdents , 3)
170 MIPS_SYS(sys_select , 5)
171 MIPS_SYS(sys_flock , 2)
172 MIPS_SYS(sys_msync , 3)
173 MIPS_SYS(sys_readv , 3) /* 4145 */
174 MIPS_SYS(sys_writev , 3)
175 MIPS_SYS(sys_cacheflush , 3)
176 MIPS_SYS(sys_cachectl , 3)
177 MIPS_SYS(sys_sysmips , 4)
178 MIPS_SYS(sys_ni_syscall , 0) /* 4150 */
179 MIPS_SYS(sys_getsid , 1)
180 MIPS_SYS(sys_fdatasync , 0)
181 MIPS_SYS(sys_sysctl , 1)
182 MIPS_SYS(sys_mlock , 2)
183 MIPS_SYS(sys_munlock , 2) /* 4155 */
184 MIPS_SYS(sys_mlockall , 1)
185 MIPS_SYS(sys_munlockall , 0)
186 MIPS_SYS(sys_sched_setparam, 2)
187 MIPS_SYS(sys_sched_getparam, 2)
188 MIPS_SYS(sys_sched_setscheduler, 3) /* 4160 */
189 MIPS_SYS(sys_sched_getscheduler, 1)
190 MIPS_SYS(sys_sched_yield , 0)
191 MIPS_SYS(sys_sched_get_priority_max, 1)
192 MIPS_SYS(sys_sched_get_priority_min, 1)
193 MIPS_SYS(sys_sched_rr_get_interval, 2) /* 4165 */
194 MIPS_SYS(sys_nanosleep, 2)
195 MIPS_SYS(sys_mremap , 5)
196 MIPS_SYS(sys_accept , 3)
197 MIPS_SYS(sys_bind , 3)
198 MIPS_SYS(sys_connect , 3) /* 4170 */
199 MIPS_SYS(sys_getpeername , 3)
200 MIPS_SYS(sys_getsockname , 3)
201 MIPS_SYS(sys_getsockopt , 5)
202 MIPS_SYS(sys_listen , 2)
203 MIPS_SYS(sys_recv , 4) /* 4175 */
204 MIPS_SYS(sys_recvfrom , 6)
205 MIPS_SYS(sys_recvmsg , 3)
206 MIPS_SYS(sys_send , 4)
207 MIPS_SYS(sys_sendmsg , 3)
208 MIPS_SYS(sys_sendto , 6) /* 4180 */
209 MIPS_SYS(sys_setsockopt , 5)
210 MIPS_SYS(sys_shutdown , 2)
211 MIPS_SYS(sys_socket , 3)
212 MIPS_SYS(sys_socketpair , 4)
213 MIPS_SYS(sys_setresuid , 3) /* 4185 */
214 MIPS_SYS(sys_getresuid , 3)
215 MIPS_SYS(sys_ni_syscall , 0) /* was sys_query_module */
216 MIPS_SYS(sys_poll , 3)
217 MIPS_SYS(sys_nfsservctl , 3)
218 MIPS_SYS(sys_setresgid , 3) /* 4190 */
219 MIPS_SYS(sys_getresgid , 3)
220 MIPS_SYS(sys_prctl , 5)
221 MIPS_SYS(sys_rt_sigreturn, 0)
222 MIPS_SYS(sys_rt_sigaction, 4)
223 MIPS_SYS(sys_rt_sigprocmask, 4) /* 4195 */
224 MIPS_SYS(sys_rt_sigpending, 2)
225 MIPS_SYS(sys_rt_sigtimedwait, 4)
226 MIPS_SYS(sys_rt_sigqueueinfo, 3)
227 MIPS_SYS(sys_rt_sigsuspend, 0)
228 MIPS_SYS(sys_pread64 , 6) /* 4200 */
229 MIPS_SYS(sys_pwrite64 , 6)
230 MIPS_SYS(sys_chown , 3)
231 MIPS_SYS(sys_getcwd , 2)
232 MIPS_SYS(sys_capget , 2)
233 MIPS_SYS(sys_capset , 2) /* 4205 */
234 MIPS_SYS(sys_sigaltstack , 2)
235 MIPS_SYS(sys_sendfile , 4)
236 MIPS_SYS(sys_ni_syscall , 0)
237 MIPS_SYS(sys_ni_syscall , 0)
238 MIPS_SYS(sys_mmap2 , 6) /* 4210 */
239 MIPS_SYS(sys_truncate64 , 4)
240 MIPS_SYS(sys_ftruncate64 , 4)
241 MIPS_SYS(sys_stat64 , 2)
242 MIPS_SYS(sys_lstat64 , 2)
243 MIPS_SYS(sys_fstat64 , 2) /* 4215 */
244 MIPS_SYS(sys_pivot_root , 2)
245 MIPS_SYS(sys_mincore , 3)
246 MIPS_SYS(sys_madvise , 3)
247 MIPS_SYS(sys_getdents64 , 3)
248 MIPS_SYS(sys_fcntl64 , 3) /* 4220 */
249 MIPS_SYS(sys_ni_syscall , 0)
250 MIPS_SYS(sys_gettid , 0)
251 MIPS_SYS(sys_readahead , 5)
252 MIPS_SYS(sys_setxattr , 5)
253 MIPS_SYS(sys_lsetxattr , 5) /* 4225 */
254 MIPS_SYS(sys_fsetxattr , 5)
255 MIPS_SYS(sys_getxattr , 4)
256 MIPS_SYS(sys_lgetxattr , 4)
257 MIPS_SYS(sys_fgetxattr , 4)
258 MIPS_SYS(sys_listxattr , 3) /* 4230 */
259 MIPS_SYS(sys_llistxattr , 3)
260 MIPS_SYS(sys_flistxattr , 3)
261 MIPS_SYS(sys_removexattr , 2)
262 MIPS_SYS(sys_lremovexattr, 2)
263 MIPS_SYS(sys_fremovexattr, 2) /* 4235 */
264 MIPS_SYS(sys_tkill , 2)
265 MIPS_SYS(sys_sendfile64 , 5)
266 MIPS_SYS(sys_futex , 6)
267 MIPS_SYS(sys_sched_setaffinity, 3)
268 MIPS_SYS(sys_sched_getaffinity, 3) /* 4240 */
269 MIPS_SYS(sys_io_setup , 2)
270 MIPS_SYS(sys_io_destroy , 1)
271 MIPS_SYS(sys_io_getevents, 5)
272 MIPS_SYS(sys_io_submit , 3)
273 MIPS_SYS(sys_io_cancel , 3) /* 4245 */
274 MIPS_SYS(sys_exit_group , 1)
275 MIPS_SYS(sys_lookup_dcookie, 3)
276 MIPS_SYS(sys_epoll_create, 1)
277 MIPS_SYS(sys_epoll_ctl , 4)
278 MIPS_SYS(sys_epoll_wait , 3) /* 4250 */
279 MIPS_SYS(sys_remap_file_pages, 5)
280 MIPS_SYS(sys_set_tid_address, 1)
281 MIPS_SYS(sys_restart_syscall, 0)
282 MIPS_SYS(sys_fadvise64_64, 7)
283 MIPS_SYS(sys_statfs64 , 3) /* 4255 */
284 MIPS_SYS(sys_fstatfs64 , 2)
285 MIPS_SYS(sys_timer_create, 3)
286 MIPS_SYS(sys_timer_settime, 4)
287 MIPS_SYS(sys_timer_gettime, 2)
288 MIPS_SYS(sys_timer_getoverrun, 1) /* 4260 */
289 MIPS_SYS(sys_timer_delete, 1)
290 MIPS_SYS(sys_clock_settime, 2)
291 MIPS_SYS(sys_clock_gettime, 2)
292 MIPS_SYS(sys_clock_getres, 2)
293 MIPS_SYS(sys_clock_nanosleep, 4) /* 4265 */
294 MIPS_SYS(sys_tgkill , 3)
295 MIPS_SYS(sys_utimes , 2)
296 MIPS_SYS(sys_mbind , 4)
297 MIPS_SYS(sys_ni_syscall , 0) /* sys_get_mempolicy */
298 MIPS_SYS(sys_ni_syscall , 0) /* 4270 sys_set_mempolicy */
299 MIPS_SYS(sys_mq_open , 4)
300 MIPS_SYS(sys_mq_unlink , 1)
301 MIPS_SYS(sys_mq_timedsend, 5)
302 MIPS_SYS(sys_mq_timedreceive, 5)
303 MIPS_SYS(sys_mq_notify , 2) /* 4275 */
304 MIPS_SYS(sys_mq_getsetattr, 3)
305 MIPS_SYS(sys_ni_syscall , 0) /* sys_vserver */
306 MIPS_SYS(sys_waitid , 4)
307 MIPS_SYS(sys_ni_syscall , 0) /* available, was setaltroot */
308 MIPS_SYS(sys_add_key , 5)
309 MIPS_SYS(sys_request_key, 4)
310 MIPS_SYS(sys_keyctl , 5)
311 MIPS_SYS(sys_set_thread_area, 1)
312 MIPS_SYS(sys_inotify_init, 0)
313 MIPS_SYS(sys_inotify_add_watch, 3) /* 4285 */
314 MIPS_SYS(sys_inotify_rm_watch, 2)
315 MIPS_SYS(sys_migrate_pages, 4)
316 MIPS_SYS(sys_openat, 4)
317 MIPS_SYS(sys_mkdirat, 3)
318 MIPS_SYS(sys_mknodat, 4) /* 4290 */
319 MIPS_SYS(sys_fchownat, 5)
320 MIPS_SYS(sys_futimesat, 3)
321 MIPS_SYS(sys_fstatat64, 4)
322 MIPS_SYS(sys_unlinkat, 3)
323 MIPS_SYS(sys_renameat, 4) /* 4295 */
324 MIPS_SYS(sys_linkat, 5)
325 MIPS_SYS(sys_symlinkat, 3)
326 MIPS_SYS(sys_readlinkat, 4)
327 MIPS_SYS(sys_fchmodat, 3)
328 MIPS_SYS(sys_faccessat, 3) /* 4300 */
329 MIPS_SYS(sys_pselect6, 6)
330 MIPS_SYS(sys_ppoll, 5)
331 MIPS_SYS(sys_unshare, 1)
332 MIPS_SYS(sys_splice, 6)
333 MIPS_SYS(sys_sync_file_range, 7) /* 4305 */
334 MIPS_SYS(sys_tee, 4)
335 MIPS_SYS(sys_vmsplice, 4)
336 MIPS_SYS(sys_move_pages, 6)
337 MIPS_SYS(sys_set_robust_list, 2)
338 MIPS_SYS(sys_get_robust_list, 3) /* 4310 */
339 MIPS_SYS(sys_kexec_load, 4)
340 MIPS_SYS(sys_getcpu, 3)
341 MIPS_SYS(sys_epoll_pwait, 6)
342 MIPS_SYS(sys_ioprio_set, 3)
343 MIPS_SYS(sys_ioprio_get, 2)
344 MIPS_SYS(sys_utimensat, 4)
345 MIPS_SYS(sys_signalfd, 3)
346 MIPS_SYS(sys_ni_syscall, 0) /* was timerfd */
347 MIPS_SYS(sys_eventfd, 1)
348 MIPS_SYS(sys_fallocate, 6) /* 4320 */
349 MIPS_SYS(sys_timerfd_create, 2)
350 MIPS_SYS(sys_timerfd_gettime, 2)
351 MIPS_SYS(sys_timerfd_settime, 4)
352 MIPS_SYS(sys_signalfd4, 4)
353 MIPS_SYS(sys_eventfd2, 2) /* 4325 */
354 MIPS_SYS(sys_epoll_create1, 1)
355 MIPS_SYS(sys_dup3, 3)
356 MIPS_SYS(sys_pipe2, 2)
357 MIPS_SYS(sys_inotify_init1, 1)
358 MIPS_SYS(sys_preadv, 5) /* 4330 */
359 MIPS_SYS(sys_pwritev, 5)
360 MIPS_SYS(sys_rt_tgsigqueueinfo, 4)
361 MIPS_SYS(sys_perf_event_open, 5)
362 MIPS_SYS(sys_accept4, 4)
363 MIPS_SYS(sys_recvmmsg, 5) /* 4335 */
364 MIPS_SYS(sys_fanotify_init, 2)
365 MIPS_SYS(sys_fanotify_mark, 6)
366 MIPS_SYS(sys_prlimit64, 4)
367 MIPS_SYS(sys_name_to_handle_at, 5)
368 MIPS_SYS(sys_open_by_handle_at, 3) /* 4340 */
369 MIPS_SYS(sys_clock_adjtime, 2)
370 MIPS_SYS(sys_syncfs, 1)
371 MIPS_SYS(sys_sendmmsg, 4)
372 MIPS_SYS(sys_setns, 2)
373 MIPS_SYS(sys_process_vm_readv, 6) /* 345 */
374 MIPS_SYS(sys_process_vm_writev, 6)
375 MIPS_SYS(sys_kcmp, 5)
376 MIPS_SYS(sys_finit_module, 3)
377 MIPS_SYS(sys_sched_setattr, 2)
378 MIPS_SYS(sys_sched_getattr, 3) /* 350 */
379 MIPS_SYS(sys_renameat2, 5)
380 MIPS_SYS(sys_seccomp, 3)
381 MIPS_SYS(sys_getrandom, 3)
382 MIPS_SYS(sys_memfd_create, 2)
383 MIPS_SYS(sys_bpf, 3) /* 355 */
384 MIPS_SYS(sys_execveat, 5)
385 MIPS_SYS(sys_userfaultfd, 1)
386 MIPS_SYS(sys_membarrier, 2)
387 MIPS_SYS(sys_mlock2, 3)
388 MIPS_SYS(sys_copy_file_range, 6) /* 360 */
389 MIPS_SYS(sys_preadv2, 6)
390 MIPS_SYS(sys_pwritev2, 6)
391 };
392 # undef MIPS_SYS
393 # endif /* O32 */
394
do_store_exclusive(CPUMIPSState * env)395 static int do_store_exclusive(CPUMIPSState *env)
396 {
397 target_ulong addr;
398 target_ulong page_addr;
399 target_ulong val;
400 uint32_t val_wp = 0;
401 uint32_t llnewval_wp = 0;
402 int flags;
403 int segv = 0;
404 int reg;
405 int d;
406 int wp;
407
408 addr = env->lladdr;
409 page_addr = addr & TARGET_PAGE_MASK;
410 start_exclusive();
411 mmap_lock();
412 flags = page_get_flags(page_addr);
413 if ((flags & PAGE_READ) == 0) {
414 segv = 1;
415 } else {
416 reg = env->llreg & 0x1f;
417 d = (env->llreg & 0x20) != 0;
418 wp = (env->llreg & 0x40) != 0;
419 if (!wp) {
420 if (d) {
421 segv = get_user_s64(val, addr);
422 } else {
423 segv = get_user_s32(val, addr);
424 }
425 } else {
426 segv = get_user_s32(val, addr);
427 segv |= get_user_s32(val_wp, addr);
428 llnewval_wp = env->llnewval_wp;
429 }
430 if (!segv) {
431 if (val != env->llval && val_wp == llnewval_wp) {
432 env->active_tc.gpr[reg] = 0;
433 } else {
434 if (!wp) {
435 if (d) {
436 segv = put_user_u64(env->llnewval, addr);
437 } else {
438 segv = put_user_u32(env->llnewval, addr);
439 }
440 } else {
441 segv = put_user_u32(env->llnewval, addr);
442 segv |= put_user_u32(env->llnewval_wp, addr + 4);
443 }
444 if (!segv) {
445 env->active_tc.gpr[reg] = 1;
446 }
447 }
448 }
449 }
450 env->lladdr = -1;
451 if (!segv) {
452 env->active_tc.PC += 4;
453 }
454 mmap_unlock();
455 end_exclusive();
456 return segv;
457 }
458
459 /* Break codes */
460 enum {
461 BRK_OVERFLOW = 6,
462 BRK_DIVZERO = 7
463 };
464
do_break(CPUMIPSState * env,target_siginfo_t * info,unsigned int code)465 static int do_break(CPUMIPSState *env, target_siginfo_t *info,
466 unsigned int code)
467 {
468 int ret = -1;
469
470 switch (code) {
471 case BRK_OVERFLOW:
472 case BRK_DIVZERO:
473 info->si_signo = TARGET_SIGFPE;
474 info->si_errno = 0;
475 info->si_code = (code == BRK_OVERFLOW) ? FPE_INTOVF : FPE_INTDIV;
476 queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
477 ret = 0;
478 break;
479 default:
480 info->si_signo = TARGET_SIGTRAP;
481 info->si_errno = 0;
482 queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info);
483 ret = 0;
484 break;
485 }
486
487 return ret;
488 }
489
cpu_loop(CPUMIPSState * env)490 void cpu_loop(CPUMIPSState *env)
491 {
492 CPUState *cs = CPU(mips_env_get_cpu(env));
493 target_siginfo_t info;
494 int trapnr;
495 abi_long ret;
496 # ifdef TARGET_ABI_MIPSO32
497 unsigned int syscall_num;
498 # endif
499
500 for(;;) {
501 cpu_exec_start(cs);
502 trapnr = cpu_exec(cs);
503 cpu_exec_end(cs);
504 process_queued_cpu_work(cs);
505
506 switch(trapnr) {
507 case EXCP_SYSCALL:
508 env->active_tc.PC += 4;
509 # ifdef TARGET_ABI_MIPSO32
510 syscall_num = env->active_tc.gpr[2] - 4000;
511 if (syscall_num >= sizeof(mips_syscall_args)) {
512 ret = -TARGET_ENOSYS;
513 } else {
514 int nb_args;
515 abi_ulong sp_reg;
516 abi_ulong arg5 = 0, arg6 = 0, arg7 = 0, arg8 = 0;
517
518 nb_args = mips_syscall_args[syscall_num];
519 sp_reg = env->active_tc.gpr[29];
520 switch (nb_args) {
521 /* these arguments are taken from the stack */
522 case 8:
523 if ((ret = get_user_ual(arg8, sp_reg + 28)) != 0) {
524 goto done_syscall;
525 }
526 case 7:
527 if ((ret = get_user_ual(arg7, sp_reg + 24)) != 0) {
528 goto done_syscall;
529 }
530 case 6:
531 if ((ret = get_user_ual(arg6, sp_reg + 20)) != 0) {
532 goto done_syscall;
533 }
534 case 5:
535 if ((ret = get_user_ual(arg5, sp_reg + 16)) != 0) {
536 goto done_syscall;
537 }
538 default:
539 break;
540 }
541 ret = do_syscall(env, env->active_tc.gpr[2],
542 env->active_tc.gpr[4],
543 env->active_tc.gpr[5],
544 env->active_tc.gpr[6],
545 env->active_tc.gpr[7],
546 arg5, arg6, arg7, arg8);
547 }
548 done_syscall:
549 # else
550 ret = do_syscall(env, env->active_tc.gpr[2],
551 env->active_tc.gpr[4], env->active_tc.gpr[5],
552 env->active_tc.gpr[6], env->active_tc.gpr[7],
553 env->active_tc.gpr[8], env->active_tc.gpr[9],
554 env->active_tc.gpr[10], env->active_tc.gpr[11]);
555 # endif /* O32 */
556 if (ret == -TARGET_ERESTARTSYS) {
557 env->active_tc.PC -= 4;
558 break;
559 }
560 if (ret == -TARGET_QEMU_ESIGRETURN) {
561 /* Returning from a successful sigreturn syscall.
562 Avoid clobbering register state. */
563 break;
564 }
565 if ((abi_ulong)ret >= (abi_ulong)-1133) {
566 env->active_tc.gpr[7] = 1; /* error flag */
567 ret = -ret;
568 } else {
569 env->active_tc.gpr[7] = 0; /* error flag */
570 }
571 env->active_tc.gpr[2] = ret;
572 break;
573 case EXCP_TLBL:
574 case EXCP_TLBS:
575 case EXCP_AdEL:
576 case EXCP_AdES:
577 info.si_signo = TARGET_SIGSEGV;
578 info.si_errno = 0;
579 /* XXX: check env->error_code */
580 info.si_code = TARGET_SEGV_MAPERR;
581 info._sifields._sigfault._addr = env->CP0_BadVAddr;
582 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
583 break;
584 case EXCP_CpU:
585 case EXCP_RI:
586 info.si_signo = TARGET_SIGILL;
587 info.si_errno = 0;
588 info.si_code = 0;
589 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
590 break;
591 case EXCP_INTERRUPT:
592 /* just indicate that signals should be handled asap */
593 break;
594 case EXCP_DEBUG:
595 {
596 int sig;
597
598 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
599 if (sig)
600 {
601 info.si_signo = sig;
602 info.si_errno = 0;
603 info.si_code = TARGET_TRAP_BRKPT;
604 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
605 }
606 }
607 break;
608 case EXCP_SC:
609 if (do_store_exclusive(env)) {
610 info.si_signo = TARGET_SIGSEGV;
611 info.si_errno = 0;
612 info.si_code = TARGET_SEGV_MAPERR;
613 info._sifields._sigfault._addr = env->active_tc.PC;
614 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
615 }
616 break;
617 case EXCP_DSPDIS:
618 info.si_signo = TARGET_SIGILL;
619 info.si_errno = 0;
620 info.si_code = TARGET_ILL_ILLOPC;
621 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
622 break;
623 /* The code below was inspired by the MIPS Linux kernel trap
624 * handling code in arch/mips/kernel/traps.c.
625 */
626 case EXCP_BREAK:
627 {
628 abi_ulong trap_instr;
629 unsigned int code;
630
631 if (env->hflags & MIPS_HFLAG_M16) {
632 if (env->insn_flags & ASE_MICROMIPS) {
633 /* microMIPS mode */
634 ret = get_user_u16(trap_instr, env->active_tc.PC);
635 if (ret != 0) {
636 goto error;
637 }
638
639 if ((trap_instr >> 10) == 0x11) {
640 /* 16-bit instruction */
641 code = trap_instr & 0xf;
642 } else {
643 /* 32-bit instruction */
644 abi_ulong instr_lo;
645
646 ret = get_user_u16(instr_lo,
647 env->active_tc.PC + 2);
648 if (ret != 0) {
649 goto error;
650 }
651 trap_instr = (trap_instr << 16) | instr_lo;
652 code = ((trap_instr >> 6) & ((1 << 20) - 1));
653 /* Unfortunately, microMIPS also suffers from
654 the old assembler bug... */
655 if (code >= (1 << 10)) {
656 code >>= 10;
657 }
658 }
659 } else {
660 /* MIPS16e mode */
661 ret = get_user_u16(trap_instr, env->active_tc.PC);
662 if (ret != 0) {
663 goto error;
664 }
665 code = (trap_instr >> 6) & 0x3f;
666 }
667 } else {
668 ret = get_user_u32(trap_instr, env->active_tc.PC);
669 if (ret != 0) {
670 goto error;
671 }
672
673 /* As described in the original Linux kernel code, the
674 * below checks on 'code' are to work around an old
675 * assembly bug.
676 */
677 code = ((trap_instr >> 6) & ((1 << 20) - 1));
678 if (code >= (1 << 10)) {
679 code >>= 10;
680 }
681 }
682
683 if (do_break(env, &info, code) != 0) {
684 goto error;
685 }
686 }
687 break;
688 case EXCP_TRAP:
689 {
690 abi_ulong trap_instr;
691 unsigned int code = 0;
692
693 if (env->hflags & MIPS_HFLAG_M16) {
694 /* microMIPS mode */
695 abi_ulong instr[2];
696
697 ret = get_user_u16(instr[0], env->active_tc.PC) ||
698 get_user_u16(instr[1], env->active_tc.PC + 2);
699
700 trap_instr = (instr[0] << 16) | instr[1];
701 } else {
702 ret = get_user_u32(trap_instr, env->active_tc.PC);
703 }
704
705 if (ret != 0) {
706 goto error;
707 }
708
709 /* The immediate versions don't provide a code. */
710 if (!(trap_instr & 0xFC000000)) {
711 if (env->hflags & MIPS_HFLAG_M16) {
712 /* microMIPS mode */
713 code = ((trap_instr >> 12) & ((1 << 4) - 1));
714 } else {
715 code = ((trap_instr >> 6) & ((1 << 10) - 1));
716 }
717 }
718
719 if (do_break(env, &info, code) != 0) {
720 goto error;
721 }
722 }
723 break;
724 case EXCP_ATOMIC:
725 cpu_exec_step_atomic(cs);
726 break;
727 default:
728 error:
729 EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr);
730 abort();
731 }
732 process_pending_signals(env);
733 }
734 }
735
target_cpu_copy_regs(CPUArchState * env,struct target_pt_regs * regs)736 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs)
737 {
738 CPUState *cpu = ENV_GET_CPU(env);
739 TaskState *ts = cpu->opaque;
740 struct image_info *info = ts->info;
741 int i;
742
743 for(i = 0; i < 32; i++) {
744 env->active_tc.gpr[i] = regs->regs[i];
745 }
746 env->active_tc.PC = regs->cp0_epc & ~(target_ulong)1;
747 if (regs->cp0_epc & 1) {
748 env->hflags |= MIPS_HFLAG_M16;
749 }
750 if (env->insn_flags & ISA_NANOMIPS32) {
751 return;
752 }
753 if (((info->elf_flags & EF_MIPS_NAN2008) != 0) !=
754 ((env->active_fpu.fcr31 & (1 << FCR31_NAN2008)) != 0)) {
755 if ((env->active_fpu.fcr31_rw_bitmask &
756 (1 << FCR31_NAN2008)) == 0) {
757 fprintf(stderr, "ELF binary's NaN mode not supported by CPU\n");
758 exit(1);
759 }
760 if ((info->elf_flags & EF_MIPS_NAN2008) != 0) {
761 env->active_fpu.fcr31 |= (1 << FCR31_NAN2008);
762 } else {
763 env->active_fpu.fcr31 &= ~(1 << FCR31_NAN2008);
764 }
765 restore_snan_bit_mode(env);
766 }
767 }
768