arch/mips/kernel/scall64-64.S

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
   7  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   8  * Copyright (C) 2001 MIPS Technologies, Inc.
   9  */
  10 #include <linux/errno.h>
  11 #include <asm/asm.h>
  12 #include <asm/asmmacro.h>
  13 #include <asm/irqflags.h>
  14 #include <asm/mipsregs.h>
  15 #include <asm/regdef.h>
  16 #include <asm/stackframe.h>
  17 #include <asm/asm-offsets.h>
  18 #include <asm/sysmips.h>
  19 #include <asm/thread_info.h>
  20 #include <asm/unistd.h>
  21 #include <asm/war.h>
  22
  23 #ifndef CONFIG_BINFMT_ELF32
  24 /* Neither O32 nor N32, so define handle_sys here */
  25 #define handle_sys64 handle_sys
  26 #endif
  27
  28         .align  5
  29 NESTED(handle_sys64, PT_SIZE, sp)
  30 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
  31         /*
  32          * When 32-bit compatibility is configured scall_o32.S
  33          * already did this.
  34          */
  35         .set    noat
  36         SAVE_SOME
  37         TRACE_IRQS_ON_RELOAD
  38         STI
  39         .set    at
  40 #endif
  41
  42 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
  43         ld      t1, PT_EPC(sp)          # skip syscall on return
  44         daddiu  t1, 4                   # skip to next instruction
  45         sd      t1, PT_EPC(sp)
  46 #endif
  47
  48         sd      a3, PT_R26(sp)          # save a3 for syscall restarting
  49
  50         li      t1, _TIF_WORK_SYSCALL_ENTRY
  51         LONG_L  t0, TI_FLAGS($28)       # syscall tracing enabled?
  52         and     t0, t1, t0
  53         bnez    t0, syscall_trace_entry
  54
  55 syscall_common:
  56         dsubu   t2, v0, __NR_64_Linux
  57         sltiu   t0, t2, __NR_64_Linux_syscalls + 1
  58         beqz    t0, illegal_syscall
  59
  60         dsll    t0, t2, 3               # offset into table
  61         dla     t2, sys_call_table
  62         daddu   t0, t2, t0
  63         ld      t2, (t0)                # syscall routine
  64         beqz    t2, illegal_syscall
  65
  66         jalr    t2                      # Do The Real Thing (TM)
  67
  68         li      t0, -EMAXERRNO - 1      # error?
  69         sltu    t0, t0, v0
  70         sd      t0, PT_R7(sp)           # set error flag
  71         beqz    t0, 1f
  72
  73         ld      t1, PT_R2(sp)           # syscall number
  74         dnegu   v0                      # error
  75         sd      t1, PT_R0(sp)           # save it for syscall restarting
  76 1:      sd      v0, PT_R2(sp)           # result
  77
  78 n64_syscall_exit:
  79         j       syscall_exit_partial
  80
  81 /* ------------------------------------------------------------------------ */
  82
  83 syscall_trace_entry:
  84         SAVE_STATIC
  85         move    a0, sp
  86         move    a1, v0
  87         jal     syscall_trace_enter
  88
  89         bltz    v0, 1f                  # seccomp failed? Skip syscall
  90
  91         RESTORE_STATIC
  92         ld      v0, PT_R2(sp)           # Restore syscall (maybe modified)
  93         ld      a0, PT_R4(sp)           # Restore argument registers
  94         ld      a1, PT_R5(sp)
  95         ld      a2, PT_R6(sp)
  96         ld      a3, PT_R7(sp)
  97         ld      a4, PT_R8(sp)
  98         ld      a5, PT_R9(sp)
  99         j       syscall_common
 100
 101 1:      j       syscall_exit
 102
 103 illegal_syscall:
 104         /* This also isn't a 64-bit syscall, throw an error.  */
 105         li      v0, ENOSYS                      # error
 106         sd      v0, PT_R2(sp)
 107         li      t0, 1                           # set error flag
 108         sd      t0, PT_R7(sp)
 109         j       n64_syscall_exit
 110         END(handle_sys64)
 111
 112         .align  3
 113         .type   sys_call_table, @object
 114 EXPORT(sys_call_table)
 115         PTR     sys_read                        /* 5000 */
 116         PTR     sys_write
 117         PTR     sys_open
 118         PTR     sys_close
 119         PTR     sys_newstat
 120         PTR     sys_newfstat                    /* 5005 */
 121         PTR     sys_newlstat
 122         PTR     sys_poll
 123         PTR     sys_lseek
 124         PTR     sys_mips_mmap
 125         PTR     sys_mprotect                    /* 5010 */
 126         PTR     sys_munmap
 127         PTR     sys_brk
 128         PTR     sys_rt_sigaction
 129         PTR     sys_rt_sigprocmask
 130         PTR     sys_ioctl                       /* 5015 */
 131         PTR     sys_pread64
 132         PTR     sys_pwrite64
 133         PTR     sys_readv
 134         PTR     sys_writev
 135         PTR     sys_access                      /* 5020 */
 136         PTR     sysm_pipe
 137         PTR     sys_select
 138         PTR     sys_sched_yield
 139         PTR     sys_mremap
 140         PTR     sys_msync                       /* 5025 */
 141         PTR     sys_mincore
 142         PTR     sys_madvise
 143         PTR     sys_shmget
 144         PTR     sys_shmat
 145         PTR     sys_shmctl                      /* 5030 */
 146         PTR     sys_dup
 147         PTR     sys_dup2
 148         PTR     sys_pause
 149         PTR     sys_nanosleep
 150         PTR     sys_getitimer                   /* 5035 */
 151         PTR     sys_setitimer
 152         PTR     sys_alarm
 153         PTR     sys_getpid
 154         PTR     sys_sendfile64
 155         PTR     sys_socket                      /* 5040 */
 156         PTR     sys_connect
 157         PTR     sys_accept
 158         PTR     sys_sendto
 159         PTR     sys_recvfrom
 160         PTR     sys_sendmsg                     /* 5045 */
 161         PTR     sys_recvmsg
 162         PTR     sys_shutdown
 163         PTR     sys_bind
 164         PTR     sys_listen
 165         PTR     sys_getsockname                 /* 5050 */
 166         PTR     sys_getpeername
 167         PTR     sys_socketpair
 168         PTR     sys_setsockopt
 169         PTR     sys_getsockopt
 170         PTR     __sys_clone                     /* 5055 */
 171         PTR     __sys_fork
 172         PTR     sys_execve
 173         PTR     sys_exit
 174         PTR     sys_wait4
 175         PTR     sys_kill                        /* 5060 */
 176         PTR     sys_newuname
 177         PTR     sys_semget
 178         PTR     sys_semop
 179         PTR     sys_semctl
 180         PTR     sys_shmdt                       /* 5065 */
 181         PTR     sys_msgget
 182         PTR     sys_msgsnd
 183         PTR     sys_msgrcv
 184         PTR     sys_msgctl
 185         PTR     sys_fcntl                       /* 5070 */
 186         PTR     sys_flock
 187         PTR     sys_fsync
 188         PTR     sys_fdatasync
 189         PTR     sys_truncate
 190         PTR     sys_ftruncate                   /* 5075 */
 191         PTR     sys_getdents
 192         PTR     sys_getcwd
 193         PTR     sys_chdir
 194         PTR     sys_fchdir
 195         PTR     sys_rename                      /* 5080 */
 196         PTR     sys_mkdir
 197         PTR     sys_rmdir
 198         PTR     sys_creat
 199         PTR     sys_link
 200         PTR     sys_unlink                      /* 5085 */
 201         PTR     sys_symlink
 202         PTR     sys_readlink
 203         PTR     sys_chmod
 204         PTR     sys_fchmod
 205         PTR     sys_chown                       /* 5090 */
 206         PTR     sys_fchown
 207         PTR     sys_lchown
 208         PTR     sys_umask
 209         PTR     sys_gettimeofday
 210         PTR     sys_getrlimit                   /* 5095 */
 211         PTR     sys_getrusage
 212         PTR     sys_sysinfo
 213         PTR     sys_times
 214         PTR     sys_ptrace
 215         PTR     sys_getuid                      /* 5100 */
 216         PTR     sys_syslog
 217         PTR     sys_getgid
 218         PTR     sys_setuid
 219         PTR     sys_setgid
 220         PTR     sys_geteuid                     /* 5105 */
 221         PTR     sys_getegid
 222         PTR     sys_setpgid
 223         PTR     sys_getppid
 224         PTR     sys_getpgrp
 225         PTR     sys_setsid                      /* 5110 */
 226         PTR     sys_setreuid
 227         PTR     sys_setregid
 228         PTR     sys_getgroups
 229         PTR     sys_setgroups
 230         PTR     sys_setresuid                   /* 5115 */
 231         PTR     sys_getresuid
 232         PTR     sys_setresgid
 233         PTR     sys_getresgid
 234         PTR     sys_getpgid
 235         PTR     sys_setfsuid                    /* 5120 */
 236         PTR     sys_setfsgid
 237         PTR     sys_getsid
 238         PTR     sys_capget
 239         PTR     sys_capset
 240         PTR     sys_rt_sigpending               /* 5125 */
 241         PTR     sys_rt_sigtimedwait
 242         PTR     sys_rt_sigqueueinfo
 243         PTR     sys_rt_sigsuspend
 244         PTR     sys_sigaltstack
 245         PTR     sys_utime                       /* 5130 */
 246         PTR     sys_mknod
 247         PTR     sys_personality
 248         PTR     sys_ustat
 249         PTR     sys_statfs
 250         PTR     sys_fstatfs                     /* 5135 */
 251         PTR     sys_sysfs
 252         PTR     sys_getpriority
 253         PTR     sys_setpriority
 254         PTR     sys_sched_setparam
 255         PTR     sys_sched_getparam              /* 5140 */
 256         PTR     sys_sched_setscheduler
 257         PTR     sys_sched_getscheduler
 258         PTR     sys_sched_get_priority_max
 259         PTR     sys_sched_get_priority_min
 260         PTR     sys_sched_rr_get_interval       /* 5145 */
 261         PTR     sys_mlock
 262         PTR     sys_munlock
 263         PTR     sys_mlockall
 264         PTR     sys_munlockall
 265         PTR     sys_vhangup                     /* 5150 */
 266         PTR     sys_pivot_root
 267         PTR     sys_sysctl
 268         PTR     sys_prctl
 269         PTR     sys_adjtimex
 270         PTR     sys_setrlimit                   /* 5155 */
 271         PTR     sys_chroot
 272         PTR     sys_sync
 273         PTR     sys_acct
 274         PTR     sys_settimeofday
 275         PTR     sys_mount                       /* 5160 */
 276         PTR     sys_umount
 277         PTR     sys_swapon
 278         PTR     sys_swapoff
 279         PTR     sys_reboot
 280         PTR     sys_sethostname                 /* 5165 */
 281         PTR     sys_setdomainname
 282         PTR     sys_ni_syscall                  /* was create_module */
 283         PTR     sys_init_module
 284         PTR     sys_delete_module
 285         PTR     sys_ni_syscall                  /* 5170, was get_kernel_syms */
 286         PTR     sys_ni_syscall                  /* was query_module */
 287         PTR     sys_quotactl
 288         PTR     sys_ni_syscall                  /* was nfsservctl */
 289         PTR     sys_ni_syscall                  /* res. for getpmsg */
 290         PTR     sys_ni_syscall                  /* 5175  for putpmsg */
 291         PTR     sys_ni_syscall                  /* res. for afs_syscall */
 292         PTR     sys_ni_syscall                  /* res. for security */
 293         PTR     sys_gettid
 294         PTR     sys_readahead
 295         PTR     sys_setxattr                    /* 5180 */
 296         PTR     sys_lsetxattr
 297         PTR     sys_fsetxattr
 298         PTR     sys_getxattr
 299         PTR     sys_lgetxattr
 300         PTR     sys_fgetxattr                   /* 5185 */
 301         PTR     sys_listxattr
 302         PTR     sys_llistxattr
 303         PTR     sys_flistxattr
 304         PTR     sys_removexattr
 305         PTR     sys_lremovexattr                /* 5190 */
 306         PTR     sys_fremovexattr
 307         PTR     sys_tkill
 308         PTR     sys_ni_syscall
 309         PTR     sys_futex
 310         PTR     sys_sched_setaffinity           /* 5195 */
 311         PTR     sys_sched_getaffinity
 312         PTR     sys_cacheflush
 313         PTR     sys_cachectl
 314         PTR     __sys_sysmips
 315         PTR     sys_io_setup                    /* 5200 */
 316         PTR     sys_io_destroy
 317         PTR     sys_io_getevents
 318         PTR     sys_io_submit
 319         PTR     sys_io_cancel
 320         PTR     sys_exit_group                  /* 5205 */
 321         PTR     sys_lookup_dcookie
 322         PTR     sys_epoll_create
 323         PTR     sys_epoll_ctl
 324         PTR     sys_epoll_wait
 325         PTR     sys_remap_file_pages            /* 5210 */
 326         PTR     sys_rt_sigreturn
 327         PTR     sys_set_tid_address
 328         PTR     sys_restart_syscall
 329         PTR     sys_semtimedop
 330         PTR     sys_fadvise64_64                /* 5215 */
 331         PTR     sys_timer_create
 332         PTR     sys_timer_settime
 333         PTR     sys_timer_gettime
 334         PTR     sys_timer_getoverrun
 335         PTR     sys_timer_delete                /* 5220 */
 336         PTR     sys_clock_settime
 337         PTR     sys_clock_gettime
 338         PTR     sys_clock_getres
 339         PTR     sys_clock_nanosleep
 340         PTR     sys_tgkill                      /* 5225 */
 341         PTR     sys_utimes
 342         PTR     sys_mbind
 343         PTR     sys_get_mempolicy
 344         PTR     sys_set_mempolicy
 345         PTR     sys_mq_open                     /* 5230 */
 346         PTR     sys_mq_unlink
 347         PTR     sys_mq_timedsend
 348         PTR     sys_mq_timedreceive
 349         PTR     sys_mq_notify
 350         PTR     sys_mq_getsetattr               /* 5235 */
 351         PTR     sys_ni_syscall                  /* sys_vserver */
 352         PTR     sys_waitid
 353         PTR     sys_ni_syscall                  /* available, was setaltroot */
 354         PTR     sys_add_key
 355         PTR     sys_request_key                 /* 5240 */
 356         PTR     sys_keyctl
 357         PTR     sys_set_thread_area
 358         PTR     sys_inotify_init
 359         PTR     sys_inotify_add_watch
 360         PTR     sys_inotify_rm_watch            /* 5245 */
 361         PTR     sys_migrate_pages
 362         PTR     sys_openat
 363         PTR     sys_mkdirat
 364         PTR     sys_mknodat
 365         PTR     sys_fchownat                    /* 5250 */
 366         PTR     sys_futimesat
 367         PTR     sys_newfstatat
 368         PTR     sys_unlinkat
 369         PTR     sys_renameat
 370         PTR     sys_linkat                      /* 5255 */
 371         PTR     sys_symlinkat
 372         PTR     sys_readlinkat
 373         PTR     sys_fchmodat
 374         PTR     sys_faccessat
 375         PTR     sys_pselect6                    /* 5260 */
 376         PTR     sys_ppoll
 377         PTR     sys_unshare
 378         PTR     sys_splice
 379         PTR     sys_sync_file_range
 380         PTR     sys_tee                         /* 5265 */
 381         PTR     sys_vmsplice
 382         PTR     sys_move_pages
 383         PTR     sys_set_robust_list
 384         PTR     sys_get_robust_list
 385         PTR     sys_kexec_load                  /* 5270 */
 386         PTR     sys_getcpu
 387         PTR     sys_epoll_pwait
 388         PTR     sys_ioprio_set
 389         PTR     sys_ioprio_get
 390         PTR     sys_utimensat                   /* 5275 */
 391         PTR     sys_signalfd
 392         PTR     sys_ni_syscall                  /* was timerfd */
 393         PTR     sys_eventfd
 394         PTR     sys_fallocate
 395         PTR     sys_timerfd_create              /* 5280 */
 396         PTR     sys_timerfd_gettime
 397         PTR     sys_timerfd_settime
 398         PTR     sys_signalfd4
 399         PTR     sys_eventfd2
 400         PTR     sys_epoll_create1               /* 5285 */
 401         PTR     sys_dup3
 402         PTR     sys_pipe2
 403         PTR     sys_inotify_init1
 404         PTR     sys_preadv
 405         PTR     sys_pwritev                     /* 5290 */
 406         PTR     sys_rt_tgsigqueueinfo
 407         PTR     sys_perf_event_open
 408         PTR     sys_accept4
 409         PTR     sys_recvmmsg
 410         PTR     sys_fanotify_init               /* 5295 */
 411         PTR     sys_fanotify_mark
 412         PTR     sys_prlimit64
 413         PTR     sys_name_to_handle_at
 414         PTR     sys_open_by_handle_at
 415         PTR     sys_clock_adjtime               /* 5300 */
 416         PTR     sys_syncfs
 417         PTR     sys_sendmmsg
 418         PTR     sys_setns
 419         PTR     sys_process_vm_readv
 420         PTR     sys_process_vm_writev           /* 5305 */
 421         PTR     sys_kcmp
 422         PTR     sys_finit_module
 423         PTR     sys_getdents64
 424         PTR     sys_sched_setattr
 425         PTR     sys_sched_getattr               /* 5310 */
 426         PTR     sys_renameat2
 427         PTR     sys_seccomp
 428         PTR     sys_getrandom
 429         PTR     sys_memfd_create
 430         PTR     sys_bpf                         /* 5315 */
 431         PTR     sys_execveat
 432         PTR     sys_userfaultfd
 433         PTR     sys_membarrier
 434         PTR     sys_mlock2
 435         PTR     sys_copy_file_range             /* 5320 */
 436         PTR     sys_preadv2
 437         PTR     sys_pwritev2
 438         PTR     sys_pkey_mprotect
 439         PTR     sys_pkey_alloc
 440         PTR     sys_pkey_free                   /* 5325 */
 441         PTR     sys_statx
 442         .size   sys_call_table,.-sys_call_table