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 #include "internal.h" 26 27 # ifdef TARGET_ABI_MIPSO32 28 # define MIPS_SYS(name, args) args, 29 static const uint8_t mips_syscall_args[] = { 30 MIPS_SYS(sys_syscall , 8) /* 4000 */ 31 MIPS_SYS(sys_exit , 1) 32 MIPS_SYS(sys_fork , 0) 33 MIPS_SYS(sys_read , 3) 34 MIPS_SYS(sys_write , 3) 35 MIPS_SYS(sys_open , 3) /* 4005 */ 36 MIPS_SYS(sys_close , 1) 37 MIPS_SYS(sys_waitpid , 3) 38 MIPS_SYS(sys_creat , 2) 39 MIPS_SYS(sys_link , 2) 40 MIPS_SYS(sys_unlink , 1) /* 4010 */ 41 MIPS_SYS(sys_execve , 0) 42 MIPS_SYS(sys_chdir , 1) 43 MIPS_SYS(sys_time , 1) 44 MIPS_SYS(sys_mknod , 3) 45 MIPS_SYS(sys_chmod , 2) /* 4015 */ 46 MIPS_SYS(sys_lchown , 3) 47 MIPS_SYS(sys_ni_syscall , 0) 48 MIPS_SYS(sys_ni_syscall , 0) /* was sys_stat */ 49 MIPS_SYS(sys_lseek , 3) 50 MIPS_SYS(sys_getpid , 0) /* 4020 */ 51 MIPS_SYS(sys_mount , 5) 52 MIPS_SYS(sys_umount , 1) 53 MIPS_SYS(sys_setuid , 1) 54 MIPS_SYS(sys_getuid , 0) 55 MIPS_SYS(sys_stime , 1) /* 4025 */ 56 MIPS_SYS(sys_ptrace , 4) 57 MIPS_SYS(sys_alarm , 1) 58 MIPS_SYS(sys_ni_syscall , 0) /* was sys_fstat */ 59 MIPS_SYS(sys_pause , 0) 60 MIPS_SYS(sys_utime , 2) /* 4030 */ 61 MIPS_SYS(sys_ni_syscall , 0) 62 MIPS_SYS(sys_ni_syscall , 0) 63 MIPS_SYS(sys_access , 2) 64 MIPS_SYS(sys_nice , 1) 65 MIPS_SYS(sys_ni_syscall , 0) /* 4035 */ 66 MIPS_SYS(sys_sync , 0) 67 MIPS_SYS(sys_kill , 2) 68 MIPS_SYS(sys_rename , 2) 69 MIPS_SYS(sys_mkdir , 2) 70 MIPS_SYS(sys_rmdir , 1) /* 4040 */ 71 MIPS_SYS(sys_dup , 1) 72 MIPS_SYS(sys_pipe , 0) 73 MIPS_SYS(sys_times , 1) 74 MIPS_SYS(sys_ni_syscall , 0) 75 MIPS_SYS(sys_brk , 1) /* 4045 */ 76 MIPS_SYS(sys_setgid , 1) 77 MIPS_SYS(sys_getgid , 0) 78 MIPS_SYS(sys_ni_syscall , 0) /* was signal(2) */ 79 MIPS_SYS(sys_geteuid , 0) 80 MIPS_SYS(sys_getegid , 0) /* 4050 */ 81 MIPS_SYS(sys_acct , 0) 82 MIPS_SYS(sys_umount2 , 2) 83 MIPS_SYS(sys_ni_syscall , 0) 84 MIPS_SYS(sys_ioctl , 3) 85 MIPS_SYS(sys_fcntl , 3) /* 4055 */ 86 MIPS_SYS(sys_ni_syscall , 2) 87 MIPS_SYS(sys_setpgid , 2) 88 MIPS_SYS(sys_ni_syscall , 0) 89 MIPS_SYS(sys_olduname , 1) 90 MIPS_SYS(sys_umask , 1) /* 4060 */ 91 MIPS_SYS(sys_chroot , 1) 92 MIPS_SYS(sys_ustat , 2) 93 MIPS_SYS(sys_dup2 , 2) 94 MIPS_SYS(sys_getppid , 0) 95 MIPS_SYS(sys_getpgrp , 0) /* 4065 */ 96 MIPS_SYS(sys_setsid , 0) 97 MIPS_SYS(sys_sigaction , 3) 98 MIPS_SYS(sys_sgetmask , 0) 99 MIPS_SYS(sys_ssetmask , 1) 100 MIPS_SYS(sys_setreuid , 2) /* 4070 */ 101 MIPS_SYS(sys_setregid , 2) 102 MIPS_SYS(sys_sigsuspend , 0) 103 MIPS_SYS(sys_sigpending , 1) 104 MIPS_SYS(sys_sethostname , 2) 105 MIPS_SYS(sys_setrlimit , 2) /* 4075 */ 106 MIPS_SYS(sys_getrlimit , 2) 107 MIPS_SYS(sys_getrusage , 2) 108 MIPS_SYS(sys_gettimeofday, 2) 109 MIPS_SYS(sys_settimeofday, 2) 110 MIPS_SYS(sys_getgroups , 2) /* 4080 */ 111 MIPS_SYS(sys_setgroups , 2) 112 MIPS_SYS(sys_ni_syscall , 0) /* old_select */ 113 MIPS_SYS(sys_symlink , 2) 114 MIPS_SYS(sys_ni_syscall , 0) /* was sys_lstat */ 115 MIPS_SYS(sys_readlink , 3) /* 4085 */ 116 MIPS_SYS(sys_uselib , 1) 117 MIPS_SYS(sys_swapon , 2) 118 MIPS_SYS(sys_reboot , 3) 119 MIPS_SYS(old_readdir , 3) 120 MIPS_SYS(old_mmap , 6) /* 4090 */ 121 MIPS_SYS(sys_munmap , 2) 122 MIPS_SYS(sys_truncate , 2) 123 MIPS_SYS(sys_ftruncate , 2) 124 MIPS_SYS(sys_fchmod , 2) 125 MIPS_SYS(sys_fchown , 3) /* 4095 */ 126 MIPS_SYS(sys_getpriority , 2) 127 MIPS_SYS(sys_setpriority , 3) 128 MIPS_SYS(sys_ni_syscall , 0) 129 MIPS_SYS(sys_statfs , 2) 130 MIPS_SYS(sys_fstatfs , 2) /* 4100 */ 131 MIPS_SYS(sys_ni_syscall , 0) /* was ioperm(2) */ 132 MIPS_SYS(sys_socketcall , 2) 133 MIPS_SYS(sys_syslog , 3) 134 MIPS_SYS(sys_setitimer , 3) 135 MIPS_SYS(sys_getitimer , 2) /* 4105 */ 136 MIPS_SYS(sys_newstat , 2) 137 MIPS_SYS(sys_newlstat , 2) 138 MIPS_SYS(sys_newfstat , 2) 139 MIPS_SYS(sys_uname , 1) 140 MIPS_SYS(sys_ni_syscall , 0) /* 4110 was iopl(2) */ 141 MIPS_SYS(sys_vhangup , 0) 142 MIPS_SYS(sys_ni_syscall , 0) /* was sys_idle() */ 143 MIPS_SYS(sys_ni_syscall , 0) /* was sys_vm86 */ 144 MIPS_SYS(sys_wait4 , 4) 145 MIPS_SYS(sys_swapoff , 1) /* 4115 */ 146 MIPS_SYS(sys_sysinfo , 1) 147 MIPS_SYS(sys_ipc , 6) 148 MIPS_SYS(sys_fsync , 1) 149 MIPS_SYS(sys_sigreturn , 0) 150 MIPS_SYS(sys_clone , 6) /* 4120 */ 151 MIPS_SYS(sys_setdomainname, 2) 152 MIPS_SYS(sys_newuname , 1) 153 MIPS_SYS(sys_ni_syscall , 0) /* sys_modify_ldt */ 154 MIPS_SYS(sys_adjtimex , 1) 155 MIPS_SYS(sys_mprotect , 3) /* 4125 */ 156 MIPS_SYS(sys_sigprocmask , 3) 157 MIPS_SYS(sys_ni_syscall , 0) /* was create_module */ 158 MIPS_SYS(sys_init_module , 5) 159 MIPS_SYS(sys_delete_module, 1) 160 MIPS_SYS(sys_ni_syscall , 0) /* 4130 was get_kernel_syms */ 161 MIPS_SYS(sys_quotactl , 0) 162 MIPS_SYS(sys_getpgid , 1) 163 MIPS_SYS(sys_fchdir , 1) 164 MIPS_SYS(sys_bdflush , 2) 165 MIPS_SYS(sys_sysfs , 3) /* 4135 */ 166 MIPS_SYS(sys_personality , 1) 167 MIPS_SYS(sys_ni_syscall , 0) /* for afs_syscall */ 168 MIPS_SYS(sys_setfsuid , 1) 169 MIPS_SYS(sys_setfsgid , 1) 170 MIPS_SYS(sys_llseek , 5) /* 4140 */ 171 MIPS_SYS(sys_getdents , 3) 172 MIPS_SYS(sys_select , 5) 173 MIPS_SYS(sys_flock , 2) 174 MIPS_SYS(sys_msync , 3) 175 MIPS_SYS(sys_readv , 3) /* 4145 */ 176 MIPS_SYS(sys_writev , 3) 177 MIPS_SYS(sys_cacheflush , 3) 178 MIPS_SYS(sys_cachectl , 3) 179 MIPS_SYS(sys_sysmips , 4) 180 MIPS_SYS(sys_ni_syscall , 0) /* 4150 */ 181 MIPS_SYS(sys_getsid , 1) 182 MIPS_SYS(sys_fdatasync , 0) 183 MIPS_SYS(sys_sysctl , 1) 184 MIPS_SYS(sys_mlock , 2) 185 MIPS_SYS(sys_munlock , 2) /* 4155 */ 186 MIPS_SYS(sys_mlockall , 1) 187 MIPS_SYS(sys_munlockall , 0) 188 MIPS_SYS(sys_sched_setparam, 2) 189 MIPS_SYS(sys_sched_getparam, 2) 190 MIPS_SYS(sys_sched_setscheduler, 3) /* 4160 */ 191 MIPS_SYS(sys_sched_getscheduler, 1) 192 MIPS_SYS(sys_sched_yield , 0) 193 MIPS_SYS(sys_sched_get_priority_max, 1) 194 MIPS_SYS(sys_sched_get_priority_min, 1) 195 MIPS_SYS(sys_sched_rr_get_interval, 2) /* 4165 */ 196 MIPS_SYS(sys_nanosleep, 2) 197 MIPS_SYS(sys_mremap , 5) 198 MIPS_SYS(sys_accept , 3) 199 MIPS_SYS(sys_bind , 3) 200 MIPS_SYS(sys_connect , 3) /* 4170 */ 201 MIPS_SYS(sys_getpeername , 3) 202 MIPS_SYS(sys_getsockname , 3) 203 MIPS_SYS(sys_getsockopt , 5) 204 MIPS_SYS(sys_listen , 2) 205 MIPS_SYS(sys_recv , 4) /* 4175 */ 206 MIPS_SYS(sys_recvfrom , 6) 207 MIPS_SYS(sys_recvmsg , 3) 208 MIPS_SYS(sys_send , 4) 209 MIPS_SYS(sys_sendmsg , 3) 210 MIPS_SYS(sys_sendto , 6) /* 4180 */ 211 MIPS_SYS(sys_setsockopt , 5) 212 MIPS_SYS(sys_shutdown , 2) 213 MIPS_SYS(sys_socket , 3) 214 MIPS_SYS(sys_socketpair , 4) 215 MIPS_SYS(sys_setresuid , 3) /* 4185 */ 216 MIPS_SYS(sys_getresuid , 3) 217 MIPS_SYS(sys_ni_syscall , 0) /* was sys_query_module */ 218 MIPS_SYS(sys_poll , 3) 219 MIPS_SYS(sys_nfsservctl , 3) 220 MIPS_SYS(sys_setresgid , 3) /* 4190 */ 221 MIPS_SYS(sys_getresgid , 3) 222 MIPS_SYS(sys_prctl , 5) 223 MIPS_SYS(sys_rt_sigreturn, 0) 224 MIPS_SYS(sys_rt_sigaction, 4) 225 MIPS_SYS(sys_rt_sigprocmask, 4) /* 4195 */ 226 MIPS_SYS(sys_rt_sigpending, 2) 227 MIPS_SYS(sys_rt_sigtimedwait, 4) 228 MIPS_SYS(sys_rt_sigqueueinfo, 3) 229 MIPS_SYS(sys_rt_sigsuspend, 0) 230 MIPS_SYS(sys_pread64 , 6) /* 4200 */ 231 MIPS_SYS(sys_pwrite64 , 6) 232 MIPS_SYS(sys_chown , 3) 233 MIPS_SYS(sys_getcwd , 2) 234 MIPS_SYS(sys_capget , 2) 235 MIPS_SYS(sys_capset , 2) /* 4205 */ 236 MIPS_SYS(sys_sigaltstack , 2) 237 MIPS_SYS(sys_sendfile , 4) 238 MIPS_SYS(sys_ni_syscall , 0) 239 MIPS_SYS(sys_ni_syscall , 0) 240 MIPS_SYS(sys_mmap2 , 6) /* 4210 */ 241 MIPS_SYS(sys_truncate64 , 4) 242 MIPS_SYS(sys_ftruncate64 , 4) 243 MIPS_SYS(sys_stat64 , 2) 244 MIPS_SYS(sys_lstat64 , 2) 245 MIPS_SYS(sys_fstat64 , 2) /* 4215 */ 246 MIPS_SYS(sys_pivot_root , 2) 247 MIPS_SYS(sys_mincore , 3) 248 MIPS_SYS(sys_madvise , 3) 249 MIPS_SYS(sys_getdents64 , 3) 250 MIPS_SYS(sys_fcntl64 , 3) /* 4220 */ 251 MIPS_SYS(sys_ni_syscall , 0) 252 MIPS_SYS(sys_gettid , 0) 253 MIPS_SYS(sys_readahead , 5) 254 MIPS_SYS(sys_setxattr , 5) 255 MIPS_SYS(sys_lsetxattr , 5) /* 4225 */ 256 MIPS_SYS(sys_fsetxattr , 5) 257 MIPS_SYS(sys_getxattr , 4) 258 MIPS_SYS(sys_lgetxattr , 4) 259 MIPS_SYS(sys_fgetxattr , 4) 260 MIPS_SYS(sys_listxattr , 3) /* 4230 */ 261 MIPS_SYS(sys_llistxattr , 3) 262 MIPS_SYS(sys_flistxattr , 3) 263 MIPS_SYS(sys_removexattr , 2) 264 MIPS_SYS(sys_lremovexattr, 2) 265 MIPS_SYS(sys_fremovexattr, 2) /* 4235 */ 266 MIPS_SYS(sys_tkill , 2) 267 MIPS_SYS(sys_sendfile64 , 5) 268 MIPS_SYS(sys_futex , 6) 269 MIPS_SYS(sys_sched_setaffinity, 3) 270 MIPS_SYS(sys_sched_getaffinity, 3) /* 4240 */ 271 MIPS_SYS(sys_io_setup , 2) 272 MIPS_SYS(sys_io_destroy , 1) 273 MIPS_SYS(sys_io_getevents, 5) 274 MIPS_SYS(sys_io_submit , 3) 275 MIPS_SYS(sys_io_cancel , 3) /* 4245 */ 276 MIPS_SYS(sys_exit_group , 1) 277 MIPS_SYS(sys_lookup_dcookie, 3) 278 MIPS_SYS(sys_epoll_create, 1) 279 MIPS_SYS(sys_epoll_ctl , 4) 280 MIPS_SYS(sys_epoll_wait , 3) /* 4250 */ 281 MIPS_SYS(sys_remap_file_pages, 5) 282 MIPS_SYS(sys_set_tid_address, 1) 283 MIPS_SYS(sys_restart_syscall, 0) 284 MIPS_SYS(sys_fadvise64_64, 7) 285 MIPS_SYS(sys_statfs64 , 3) /* 4255 */ 286 MIPS_SYS(sys_fstatfs64 , 2) 287 MIPS_SYS(sys_timer_create, 3) 288 MIPS_SYS(sys_timer_settime, 4) 289 MIPS_SYS(sys_timer_gettime, 2) 290 MIPS_SYS(sys_timer_getoverrun, 1) /* 4260 */ 291 MIPS_SYS(sys_timer_delete, 1) 292 MIPS_SYS(sys_clock_settime, 2) 293 MIPS_SYS(sys_clock_gettime, 2) 294 MIPS_SYS(sys_clock_getres, 2) 295 MIPS_SYS(sys_clock_nanosleep, 4) /* 4265 */ 296 MIPS_SYS(sys_tgkill , 3) 297 MIPS_SYS(sys_utimes , 2) 298 MIPS_SYS(sys_mbind , 4) 299 MIPS_SYS(sys_ni_syscall , 0) /* sys_get_mempolicy */ 300 MIPS_SYS(sys_ni_syscall , 0) /* 4270 sys_set_mempolicy */ 301 MIPS_SYS(sys_mq_open , 4) 302 MIPS_SYS(sys_mq_unlink , 1) 303 MIPS_SYS(sys_mq_timedsend, 5) 304 MIPS_SYS(sys_mq_timedreceive, 5) 305 MIPS_SYS(sys_mq_notify , 2) /* 4275 */ 306 MIPS_SYS(sys_mq_getsetattr, 3) 307 MIPS_SYS(sys_ni_syscall , 0) /* sys_vserver */ 308 MIPS_SYS(sys_waitid , 4) 309 MIPS_SYS(sys_ni_syscall , 0) /* available, was setaltroot */ 310 MIPS_SYS(sys_add_key , 5) 311 MIPS_SYS(sys_request_key, 4) 312 MIPS_SYS(sys_keyctl , 5) 313 MIPS_SYS(sys_set_thread_area, 1) 314 MIPS_SYS(sys_inotify_init, 0) 315 MIPS_SYS(sys_inotify_add_watch, 3) /* 4285 */ 316 MIPS_SYS(sys_inotify_rm_watch, 2) 317 MIPS_SYS(sys_migrate_pages, 4) 318 MIPS_SYS(sys_openat, 4) 319 MIPS_SYS(sys_mkdirat, 3) 320 MIPS_SYS(sys_mknodat, 4) /* 4290 */ 321 MIPS_SYS(sys_fchownat, 5) 322 MIPS_SYS(sys_futimesat, 3) 323 MIPS_SYS(sys_fstatat64, 4) 324 MIPS_SYS(sys_unlinkat, 3) 325 MIPS_SYS(sys_renameat, 4) /* 4295 */ 326 MIPS_SYS(sys_linkat, 5) 327 MIPS_SYS(sys_symlinkat, 3) 328 MIPS_SYS(sys_readlinkat, 4) 329 MIPS_SYS(sys_fchmodat, 3) 330 MIPS_SYS(sys_faccessat, 3) /* 4300 */ 331 MIPS_SYS(sys_pselect6, 6) 332 MIPS_SYS(sys_ppoll, 5) 333 MIPS_SYS(sys_unshare, 1) 334 MIPS_SYS(sys_splice, 6) 335 MIPS_SYS(sys_sync_file_range, 7) /* 4305 */ 336 MIPS_SYS(sys_tee, 4) 337 MIPS_SYS(sys_vmsplice, 4) 338 MIPS_SYS(sys_move_pages, 6) 339 MIPS_SYS(sys_set_robust_list, 2) 340 MIPS_SYS(sys_get_robust_list, 3) /* 4310 */ 341 MIPS_SYS(sys_kexec_load, 4) 342 MIPS_SYS(sys_getcpu, 3) 343 MIPS_SYS(sys_epoll_pwait, 6) 344 MIPS_SYS(sys_ioprio_set, 3) 345 MIPS_SYS(sys_ioprio_get, 2) 346 MIPS_SYS(sys_utimensat, 4) 347 MIPS_SYS(sys_signalfd, 3) 348 MIPS_SYS(sys_ni_syscall, 0) /* was timerfd */ 349 MIPS_SYS(sys_eventfd, 1) 350 MIPS_SYS(sys_fallocate, 6) /* 4320 */ 351 MIPS_SYS(sys_timerfd_create, 2) 352 MIPS_SYS(sys_timerfd_gettime, 2) 353 MIPS_SYS(sys_timerfd_settime, 4) 354 MIPS_SYS(sys_signalfd4, 4) 355 MIPS_SYS(sys_eventfd2, 2) /* 4325 */ 356 MIPS_SYS(sys_epoll_create1, 1) 357 MIPS_SYS(sys_dup3, 3) 358 MIPS_SYS(sys_pipe2, 2) 359 MIPS_SYS(sys_inotify_init1, 1) 360 MIPS_SYS(sys_preadv, 5) /* 4330 */ 361 MIPS_SYS(sys_pwritev, 5) 362 MIPS_SYS(sys_rt_tgsigqueueinfo, 4) 363 MIPS_SYS(sys_perf_event_open, 5) 364 MIPS_SYS(sys_accept4, 4) 365 MIPS_SYS(sys_recvmmsg, 5) /* 4335 */ 366 MIPS_SYS(sys_fanotify_init, 2) 367 MIPS_SYS(sys_fanotify_mark, 6) 368 MIPS_SYS(sys_prlimit64, 4) 369 MIPS_SYS(sys_name_to_handle_at, 5) 370 MIPS_SYS(sys_open_by_handle_at, 3) /* 4340 */ 371 MIPS_SYS(sys_clock_adjtime, 2) 372 MIPS_SYS(sys_syncfs, 1) 373 MIPS_SYS(sys_sendmmsg, 4) 374 MIPS_SYS(sys_setns, 2) 375 MIPS_SYS(sys_process_vm_readv, 6) /* 345 */ 376 MIPS_SYS(sys_process_vm_writev, 6) 377 MIPS_SYS(sys_kcmp, 5) 378 MIPS_SYS(sys_finit_module, 3) 379 MIPS_SYS(sys_sched_setattr, 2) 380 MIPS_SYS(sys_sched_getattr, 3) /* 350 */ 381 MIPS_SYS(sys_renameat2, 5) 382 MIPS_SYS(sys_seccomp, 3) 383 MIPS_SYS(sys_getrandom, 3) 384 MIPS_SYS(sys_memfd_create, 2) 385 MIPS_SYS(sys_bpf, 3) /* 355 */ 386 MIPS_SYS(sys_execveat, 5) 387 MIPS_SYS(sys_userfaultfd, 1) 388 MIPS_SYS(sys_membarrier, 2) 389 MIPS_SYS(sys_mlock2, 3) 390 MIPS_SYS(sys_copy_file_range, 6) /* 360 */ 391 MIPS_SYS(sys_preadv2, 6) 392 MIPS_SYS(sys_pwritev2, 6) 393 }; 394 # undef MIPS_SYS 395 # endif /* O32 */ 396 397 /* Break codes */ 398 enum { 399 BRK_OVERFLOW = 6, 400 BRK_DIVZERO = 7 401 }; 402 403 static int do_break(CPUMIPSState *env, target_siginfo_t *info, 404 unsigned int code) 405 { 406 int ret = -1; 407 408 switch (code) { 409 case BRK_OVERFLOW: 410 case BRK_DIVZERO: 411 info->si_signo = TARGET_SIGFPE; 412 info->si_errno = 0; 413 info->si_code = (code == BRK_OVERFLOW) ? FPE_INTOVF : FPE_INTDIV; 414 queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info); 415 ret = 0; 416 break; 417 default: 418 info->si_signo = TARGET_SIGTRAP; 419 info->si_errno = 0; 420 queue_signal(env, info->si_signo, QEMU_SI_FAULT, &*info); 421 ret = 0; 422 break; 423 } 424 425 return ret; 426 } 427 428 void cpu_loop(CPUMIPSState *env) 429 { 430 CPUState *cs = env_cpu(env); 431 target_siginfo_t info; 432 int trapnr; 433 abi_long ret; 434 # ifdef TARGET_ABI_MIPSO32 435 unsigned int syscall_num; 436 # endif 437 438 for(;;) { 439 cpu_exec_start(cs); 440 trapnr = cpu_exec(cs); 441 cpu_exec_end(cs); 442 process_queued_cpu_work(cs); 443 444 switch(trapnr) { 445 case EXCP_SYSCALL: 446 env->active_tc.PC += 4; 447 # ifdef TARGET_ABI_MIPSO32 448 syscall_num = env->active_tc.gpr[2] - 4000; 449 if (syscall_num >= sizeof(mips_syscall_args)) { 450 ret = -TARGET_ENOSYS; 451 } else { 452 int nb_args; 453 abi_ulong sp_reg; 454 abi_ulong arg5 = 0, arg6 = 0, arg7 = 0, arg8 = 0; 455 456 nb_args = mips_syscall_args[syscall_num]; 457 sp_reg = env->active_tc.gpr[29]; 458 switch (nb_args) { 459 /* these arguments are taken from the stack */ 460 case 8: 461 if ((ret = get_user_ual(arg8, sp_reg + 28)) != 0) { 462 goto done_syscall; 463 } 464 case 7: 465 if ((ret = get_user_ual(arg7, sp_reg + 24)) != 0) { 466 goto done_syscall; 467 } 468 case 6: 469 if ((ret = get_user_ual(arg6, sp_reg + 20)) != 0) { 470 goto done_syscall; 471 } 472 case 5: 473 if ((ret = get_user_ual(arg5, sp_reg + 16)) != 0) { 474 goto done_syscall; 475 } 476 default: 477 break; 478 } 479 ret = do_syscall(env, env->active_tc.gpr[2], 480 env->active_tc.gpr[4], 481 env->active_tc.gpr[5], 482 env->active_tc.gpr[6], 483 env->active_tc.gpr[7], 484 arg5, arg6, arg7, arg8); 485 } 486 done_syscall: 487 # else 488 ret = do_syscall(env, env->active_tc.gpr[2], 489 env->active_tc.gpr[4], env->active_tc.gpr[5], 490 env->active_tc.gpr[6], env->active_tc.gpr[7], 491 env->active_tc.gpr[8], env->active_tc.gpr[9], 492 env->active_tc.gpr[10], env->active_tc.gpr[11]); 493 # endif /* O32 */ 494 if (ret == -TARGET_ERESTARTSYS) { 495 env->active_tc.PC -= 4; 496 break; 497 } 498 if (ret == -TARGET_QEMU_ESIGRETURN) { 499 /* Returning from a successful sigreturn syscall. 500 Avoid clobbering register state. */ 501 break; 502 } 503 if ((abi_ulong)ret >= (abi_ulong)-1133) { 504 env->active_tc.gpr[7] = 1; /* error flag */ 505 ret = -ret; 506 } else { 507 env->active_tc.gpr[7] = 0; /* error flag */ 508 } 509 env->active_tc.gpr[2] = ret; 510 break; 511 case EXCP_TLBL: 512 case EXCP_TLBS: 513 case EXCP_AdEL: 514 case EXCP_AdES: 515 info.si_signo = TARGET_SIGSEGV; 516 info.si_errno = 0; 517 /* XXX: check env->error_code */ 518 info.si_code = TARGET_SEGV_MAPERR; 519 info._sifields._sigfault._addr = env->CP0_BadVAddr; 520 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 521 break; 522 case EXCP_CpU: 523 case EXCP_RI: 524 info.si_signo = TARGET_SIGILL; 525 info.si_errno = 0; 526 info.si_code = 0; 527 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 528 break; 529 case EXCP_INTERRUPT: 530 /* just indicate that signals should be handled asap */ 531 break; 532 case EXCP_DEBUG: 533 info.si_signo = TARGET_SIGTRAP; 534 info.si_errno = 0; 535 info.si_code = TARGET_TRAP_BRKPT; 536 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 537 break; 538 case EXCP_DSPDIS: 539 info.si_signo = TARGET_SIGILL; 540 info.si_errno = 0; 541 info.si_code = TARGET_ILL_ILLOPC; 542 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 543 break; 544 case EXCP_FPE: 545 info.si_signo = TARGET_SIGFPE; 546 info.si_errno = 0; 547 info.si_code = TARGET_FPE_FLTUNK; 548 if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_INVALID) { 549 info.si_code = TARGET_FPE_FLTINV; 550 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_DIV0) { 551 info.si_code = TARGET_FPE_FLTDIV; 552 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_OVERFLOW) { 553 info.si_code = TARGET_FPE_FLTOVF; 554 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_UNDERFLOW) { 555 info.si_code = TARGET_FPE_FLTUND; 556 } else if (GET_FP_CAUSE(env->active_fpu.fcr31) & FP_INEXACT) { 557 info.si_code = TARGET_FPE_FLTRES; 558 } 559 queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); 560 break; 561 /* The code below was inspired by the MIPS Linux kernel trap 562 * handling code in arch/mips/kernel/traps.c. 563 */ 564 case EXCP_BREAK: 565 { 566 abi_ulong trap_instr; 567 unsigned int code; 568 569 if (env->hflags & MIPS_HFLAG_M16) { 570 if (env->insn_flags & ASE_MICROMIPS) { 571 /* microMIPS mode */ 572 ret = get_user_u16(trap_instr, env->active_tc.PC); 573 if (ret != 0) { 574 goto error; 575 } 576 577 if ((trap_instr >> 10) == 0x11) { 578 /* 16-bit instruction */ 579 code = trap_instr & 0xf; 580 } else { 581 /* 32-bit instruction */ 582 abi_ulong instr_lo; 583 584 ret = get_user_u16(instr_lo, 585 env->active_tc.PC + 2); 586 if (ret != 0) { 587 goto error; 588 } 589 trap_instr = (trap_instr << 16) | instr_lo; 590 code = ((trap_instr >> 6) & ((1 << 20) - 1)); 591 /* Unfortunately, microMIPS also suffers from 592 the old assembler bug... */ 593 if (code >= (1 << 10)) { 594 code >>= 10; 595 } 596 } 597 } else { 598 /* MIPS16e mode */ 599 ret = get_user_u16(trap_instr, env->active_tc.PC); 600 if (ret != 0) { 601 goto error; 602 } 603 code = (trap_instr >> 6) & 0x3f; 604 } 605 } else { 606 ret = get_user_u32(trap_instr, env->active_tc.PC); 607 if (ret != 0) { 608 goto error; 609 } 610 611 /* As described in the original Linux kernel code, the 612 * below checks on 'code' are to work around an old 613 * assembly bug. 614 */ 615 code = ((trap_instr >> 6) & ((1 << 20) - 1)); 616 if (code >= (1 << 10)) { 617 code >>= 10; 618 } 619 } 620 621 if (do_break(env, &info, code) != 0) { 622 goto error; 623 } 624 } 625 break; 626 case EXCP_TRAP: 627 { 628 abi_ulong trap_instr; 629 unsigned int code = 0; 630 631 if (env->hflags & MIPS_HFLAG_M16) { 632 /* microMIPS mode */ 633 abi_ulong instr[2]; 634 635 ret = get_user_u16(instr[0], env->active_tc.PC) || 636 get_user_u16(instr[1], env->active_tc.PC + 2); 637 638 trap_instr = (instr[0] << 16) | instr[1]; 639 } else { 640 ret = get_user_u32(trap_instr, env->active_tc.PC); 641 } 642 643 if (ret != 0) { 644 goto error; 645 } 646 647 /* The immediate versions don't provide a code. */ 648 if (!(trap_instr & 0xFC000000)) { 649 if (env->hflags & MIPS_HFLAG_M16) { 650 /* microMIPS mode */ 651 code = ((trap_instr >> 12) & ((1 << 4) - 1)); 652 } else { 653 code = ((trap_instr >> 6) & ((1 << 10) - 1)); 654 } 655 } 656 657 if (do_break(env, &info, code) != 0) { 658 goto error; 659 } 660 } 661 break; 662 case EXCP_ATOMIC: 663 cpu_exec_step_atomic(cs); 664 break; 665 default: 666 error: 667 EXCP_DUMP(env, "qemu: unhandled CPU exception 0x%x - aborting\n", trapnr); 668 abort(); 669 } 670 process_pending_signals(env); 671 } 672 } 673 674 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) 675 { 676 CPUState *cpu = env_cpu(env); 677 TaskState *ts = cpu->opaque; 678 struct image_info *info = ts->info; 679 int i; 680 681 struct mode_req { 682 bool single; 683 bool soft; 684 bool fr1; 685 bool frdefault; 686 bool fre; 687 }; 688 689 static const struct mode_req fpu_reqs[] = { 690 [MIPS_ABI_FP_ANY] = { true, true, true, true, true }, 691 [MIPS_ABI_FP_DOUBLE] = { false, false, false, true, true }, 692 [MIPS_ABI_FP_SINGLE] = { true, false, false, false, false }, 693 [MIPS_ABI_FP_SOFT] = { false, true, false, false, false }, 694 [MIPS_ABI_FP_OLD_64] = { false, false, false, false, false }, 695 [MIPS_ABI_FP_XX] = { false, false, true, true, true }, 696 [MIPS_ABI_FP_64] = { false, false, true, false, false }, 697 [MIPS_ABI_FP_64A] = { false, false, true, false, true } 698 }; 699 700 /* 701 * Mode requirements when .MIPS.abiflags is not present in the ELF. 702 * Not present means that everything is acceptable except FR1. 703 */ 704 static struct mode_req none_req = { true, true, false, true, true }; 705 706 struct mode_req prog_req; 707 struct mode_req interp_req; 708 709 for(i = 0; i < 32; i++) { 710 env->active_tc.gpr[i] = regs->regs[i]; 711 } 712 env->active_tc.PC = regs->cp0_epc & ~(target_ulong)1; 713 if (regs->cp0_epc & 1) { 714 env->hflags |= MIPS_HFLAG_M16; 715 } 716 717 #ifdef TARGET_ABI_MIPSO32 718 # define MAX_FP_ABI MIPS_ABI_FP_64A 719 #else 720 # define MAX_FP_ABI MIPS_ABI_FP_SOFT 721 #endif 722 if ((info->fp_abi > MAX_FP_ABI && info->fp_abi != MIPS_ABI_FP_UNKNOWN) 723 || (info->interp_fp_abi > MAX_FP_ABI && 724 info->interp_fp_abi != MIPS_ABI_FP_UNKNOWN)) { 725 fprintf(stderr, "qemu: Unexpected FPU mode\n"); 726 exit(1); 727 } 728 729 prog_req = (info->fp_abi == MIPS_ABI_FP_UNKNOWN) ? none_req 730 : fpu_reqs[info->fp_abi]; 731 interp_req = (info->interp_fp_abi == MIPS_ABI_FP_UNKNOWN) ? none_req 732 : fpu_reqs[info->interp_fp_abi]; 733 734 prog_req.single &= interp_req.single; 735 prog_req.soft &= interp_req.soft; 736 prog_req.fr1 &= interp_req.fr1; 737 prog_req.frdefault &= interp_req.frdefault; 738 prog_req.fre &= interp_req.fre; 739 740 bool cpu_has_mips_r2_r6 = env->insn_flags & ISA_MIPS32R2 || 741 env->insn_flags & ISA_MIPS64R2 || 742 env->insn_flags & ISA_MIPS32R6 || 743 env->insn_flags & ISA_MIPS64R6; 744 745 if (prog_req.fre && !prog_req.frdefault && !prog_req.fr1) { 746 env->CP0_Config5 |= (1 << CP0C5_FRE); 747 if (env->active_fpu.fcr0 & (1 << FCR0_FREP)) { 748 env->hflags |= MIPS_HFLAG_FRE; 749 } 750 } else if ((prog_req.fr1 && prog_req.frdefault) || 751 (prog_req.single && !prog_req.frdefault)) { 752 if ((env->active_fpu.fcr0 & (1 << FCR0_F64) 753 && cpu_has_mips_r2_r6) || prog_req.fr1) { 754 env->CP0_Status |= (1 << CP0St_FR); 755 env->hflags |= MIPS_HFLAG_F64; 756 } 757 } else if (!prog_req.fre && !prog_req.frdefault && 758 !prog_req.fr1 && !prog_req.single && !prog_req.soft) { 759 fprintf(stderr, "qemu: Can't find a matching FPU mode\n"); 760 exit(1); 761 } 762 763 if (env->insn_flags & ISA_NANOMIPS32) { 764 return; 765 } 766 if (((info->elf_flags & EF_MIPS_NAN2008) != 0) != 767 ((env->active_fpu.fcr31 & (1 << FCR31_NAN2008)) != 0)) { 768 if ((env->active_fpu.fcr31_rw_bitmask & 769 (1 << FCR31_NAN2008)) == 0) { 770 fprintf(stderr, "ELF binary's NaN mode not supported by CPU\n"); 771 exit(1); 772 } 773 if ((info->elf_flags & EF_MIPS_NAN2008) != 0) { 774 env->active_fpu.fcr31 |= (1 << FCR31_NAN2008); 775 } else { 776 env->active_fpu.fcr31 &= ~(1 << FCR31_NAN2008); 777 } 778 restore_snan_bit_mode(env); 779 } 780 } 781