arch/mips/kernel/scall64-n32.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 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/thread_info.h>
  18 #include <asm/unistd.h>
  19
  20 #ifndef CONFIG_MIPS32_O32
  21 /* No O32, so define handle_sys here */
  22 #define handle_sysn32 handle_sys
  23 #endif
  24
  25         .align  5
  26 NESTED(handle_sysn32, PT_SIZE, sp)
  27 #ifndef CONFIG_MIPS32_O32
  28         .set    noat
  29         SAVE_SOME
  30         TRACE_IRQS_ON_RELOAD
  31         STI
  32         .set    at
  33 #endif
  34
  35         dsubu   t0, v0, __NR_N32_Linux  # check syscall number
  36         sltiu   t0, t0, __NR_N32_Linux_syscalls + 1
  37
  38 #ifndef CONFIG_MIPS32_O32
  39         ld      t1, PT_EPC(sp)          # skip syscall on return
  40         daddiu  t1, 4                   # skip to next instruction
  41         sd      t1, PT_EPC(sp)
  42 #endif
  43         beqz    t0, not_n32_scall
  44
  45         sd      a3, PT_R26(sp)          # save a3 for syscall restarting
  46
  47         li      t1, _TIF_WORK_SYSCALL_ENTRY
  48         LONG_L  t0, TI_FLAGS($28)       # syscall tracing enabled?
  49         and     t0, t1, t0
  50         bnez    t0, n32_syscall_trace_entry
  51
  52 syscall_common:
  53         dsll    t0, v0, 3               # offset into table
  54         ld      t2, (sysn32_call_table - (__NR_N32_Linux * 8))(t0)
  55
  56         jalr    t2                      # Do The Real Thing (TM)
  57
  58         li      t0, -EMAXERRNO - 1      # error?
  59         sltu    t0, t0, v0
  60         sd      t0, PT_R7(sp)           # set error flag
  61         beqz    t0, 1f
  62
  63         ld      t1, PT_R2(sp)           # syscall number
  64         dnegu   v0                      # error
  65         sd      t1, PT_R0(sp)           # save it for syscall restarting
  66 1:      sd      v0, PT_R2(sp)           # result
  67
  68         j       syscall_exit_partial
  69
  70 /* ------------------------------------------------------------------------ */
  71
  72 n32_syscall_trace_entry:
  73         SAVE_STATIC
  74         move    a0, sp
  75         move    a1, v0
  76         jal     syscall_trace_enter
  77
  78         bltz    v0, 1f                  # seccomp failed? Skip syscall
  79
  80         RESTORE_STATIC
  81         ld      v0, PT_R2(sp)           # Restore syscall (maybe modified)
  82         ld      a0, PT_R4(sp)           # Restore argument registers
  83         ld      a1, PT_R5(sp)
  84         ld      a2, PT_R6(sp)
  85         ld      a3, PT_R7(sp)
  86         ld      a4, PT_R8(sp)
  87         ld      a5, PT_R9(sp)
  88
  89         dsubu   t2, v0, __NR_N32_Linux  # check (new) syscall number
  90         sltiu   t0, t2, __NR_N32_Linux_syscalls + 1
  91         beqz    t0, not_n32_scall
  92
  93         j       syscall_common
  94
  95 1:      j       syscall_exit
  96
  97 not_n32_scall:
  98         /* This is not an n32 compatibility syscall, pass it on to
  99            the n64 syscall handlers.  */
 100         j       handle_sys64
 101
 102         END(handle_sysn32)
 103
 104         .type   sysn32_call_table, @object
 105 EXPORT(sysn32_call_table)
 106         PTR     sys_read                        /* 6000 */
 107         PTR     sys_write
 108         PTR     sys_open
 109         PTR     sys_close
 110         PTR     sys_newstat
 111         PTR     sys_newfstat                    /* 6005 */
 112         PTR     sys_newlstat
 113         PTR     sys_poll
 114         PTR     sys_lseek
 115         PTR     sys_mips_mmap
 116         PTR     sys_mprotect                    /* 6010 */
 117         PTR     sys_munmap
 118         PTR     sys_brk
 119         PTR     compat_sys_rt_sigaction
 120         PTR     compat_sys_rt_sigprocmask
 121         PTR     compat_sys_ioctl                /* 6015 */
 122         PTR     sys_pread64
 123         PTR     sys_pwrite64
 124         PTR     compat_sys_readv
 125         PTR     compat_sys_writev
 126         PTR     sys_access                      /* 6020 */
 127         PTR     sysm_pipe
 128         PTR     compat_sys_select
 129         PTR     sys_sched_yield
 130         PTR     sys_mremap
 131         PTR     sys_msync                       /* 6025 */
 132         PTR     sys_mincore
 133         PTR     sys_madvise
 134         PTR     sys_shmget
 135         PTR     sys_shmat
 136         PTR     compat_sys_shmctl                       /* 6030 */
 137         PTR     sys_dup
 138         PTR     sys_dup2
 139         PTR     sys_pause
 140         PTR     compat_sys_nanosleep
 141         PTR     compat_sys_getitimer            /* 6035 */
 142         PTR     compat_sys_setitimer
 143         PTR     sys_alarm
 144         PTR     sys_getpid
 145         PTR     compat_sys_sendfile
 146         PTR     sys_socket                      /* 6040 */
 147         PTR     sys_connect
 148         PTR     sys_accept
 149         PTR     sys_sendto
 150         PTR     compat_sys_recvfrom
 151         PTR     compat_sys_sendmsg              /* 6045 */
 152         PTR     compat_sys_recvmsg
 153         PTR     sys_shutdown
 154         PTR     sys_bind
 155         PTR     sys_listen
 156         PTR     sys_getsockname                 /* 6050 */
 157         PTR     sys_getpeername
 158         PTR     sys_socketpair
 159         PTR     compat_sys_setsockopt
 160         PTR     compat_sys_getsockopt
 161         PTR     __sys_clone                     /* 6055 */
 162         PTR     __sys_fork
 163         PTR     compat_sys_execve
 164         PTR     sys_exit
 165         PTR     compat_sys_wait4
 166         PTR     sys_kill                        /* 6060 */
 167         PTR     sys_newuname
 168         PTR     sys_semget
 169         PTR     sys_semop
 170         PTR     compat_sys_semctl
 171         PTR     sys_shmdt                       /* 6065 */
 172         PTR     sys_msgget
 173         PTR     compat_sys_msgsnd
 174         PTR     compat_sys_msgrcv
 175         PTR     compat_sys_msgctl
 176         PTR     compat_sys_fcntl                /* 6070 */
 177         PTR     sys_flock
 178         PTR     sys_fsync
 179         PTR     sys_fdatasync
 180         PTR     sys_truncate
 181         PTR     sys_ftruncate                   /* 6075 */
 182         PTR     compat_sys_getdents
 183         PTR     sys_getcwd
 184         PTR     sys_chdir
 185         PTR     sys_fchdir
 186         PTR     sys_rename                      /* 6080 */
 187         PTR     sys_mkdir
 188         PTR     sys_rmdir
 189         PTR     sys_creat
 190         PTR     sys_link
 191         PTR     sys_unlink                      /* 6085 */
 192         PTR     sys_symlink
 193         PTR     sys_readlink
 194         PTR     sys_chmod
 195         PTR     sys_fchmod
 196         PTR     sys_chown                       /* 6090 */
 197         PTR     sys_fchown
 198         PTR     sys_lchown
 199         PTR     sys_umask
 200         PTR     compat_sys_gettimeofday
 201         PTR     compat_sys_getrlimit            /* 6095 */
 202         PTR     compat_sys_getrusage
 203         PTR     compat_sys_sysinfo
 204         PTR     compat_sys_times
 205         PTR     compat_sys_ptrace
 206         PTR     sys_getuid                      /* 6100 */
 207         PTR     sys_syslog
 208         PTR     sys_getgid
 209         PTR     sys_setuid
 210         PTR     sys_setgid
 211         PTR     sys_geteuid                     /* 6105 */
 212         PTR     sys_getegid
 213         PTR     sys_setpgid
 214         PTR     sys_getppid
 215         PTR     sys_getpgrp
 216         PTR     sys_setsid                      /* 6110 */
 217         PTR     sys_setreuid
 218         PTR     sys_setregid
 219         PTR     sys_getgroups
 220         PTR     sys_setgroups
 221         PTR     sys_setresuid                   /* 6115 */
 222         PTR     sys_getresuid
 223         PTR     sys_setresgid
 224         PTR     sys_getresgid
 225         PTR     sys_getpgid
 226         PTR     sys_setfsuid                    /* 6120 */
 227         PTR     sys_setfsgid
 228         PTR     sys_getsid
 229         PTR     sys_capget
 230         PTR     sys_capset
 231         PTR     compat_sys_rt_sigpending        /* 6125 */
 232         PTR     compat_sys_rt_sigtimedwait
 233         PTR     compat_sys_rt_sigqueueinfo
 234         PTR     compat_sys_rt_sigsuspend
 235         PTR     compat_sys_sigaltstack
 236         PTR     compat_sys_utime                /* 6130 */
 237         PTR     sys_mknod
 238         PTR     sys_32_personality
 239         PTR     compat_sys_ustat
 240         PTR     compat_sys_statfs
 241         PTR     compat_sys_fstatfs              /* 6135 */
 242         PTR     sys_sysfs
 243         PTR     sys_getpriority
 244         PTR     sys_setpriority
 245         PTR     sys_sched_setparam
 246         PTR     sys_sched_getparam              /* 6140 */
 247         PTR     sys_sched_setscheduler
 248         PTR     sys_sched_getscheduler
 249         PTR     sys_sched_get_priority_max
 250         PTR     sys_sched_get_priority_min
 251         PTR     compat_sys_sched_rr_get_interval        /* 6145 */
 252         PTR     sys_mlock
 253         PTR     sys_munlock
 254         PTR     sys_mlockall
 255         PTR     sys_munlockall
 256         PTR     sys_vhangup                     /* 6150 */
 257         PTR     sys_pivot_root
 258         PTR     compat_sys_sysctl
 259         PTR     sys_prctl
 260         PTR     compat_sys_adjtimex
 261         PTR     compat_sys_setrlimit            /* 6155 */
 262         PTR     sys_chroot
 263         PTR     sys_sync
 264         PTR     sys_acct
 265         PTR     compat_sys_settimeofday
 266         PTR     compat_sys_mount                /* 6160 */
 267         PTR     sys_umount
 268         PTR     sys_swapon
 269         PTR     sys_swapoff
 270         PTR     sys_reboot
 271         PTR     sys_sethostname                 /* 6165 */
 272         PTR     sys_setdomainname
 273         PTR     sys_ni_syscall                  /* was create_module */
 274         PTR     sys_init_module
 275         PTR     sys_delete_module
 276         PTR     sys_ni_syscall                  /* 6170, was get_kernel_syms */
 277         PTR     sys_ni_syscall                  /* was query_module */
 278         PTR     sys_quotactl
 279         PTR     sys_ni_syscall                  /* was nfsservctl */
 280         PTR     sys_ni_syscall                  /* res. for getpmsg */
 281         PTR     sys_ni_syscall                  /* 6175  for putpmsg */
 282         PTR     sys_ni_syscall                  /* res. for afs_syscall */
 283         PTR     sys_ni_syscall                  /* res. for security */
 284         PTR     sys_gettid
 285         PTR     sys_readahead
 286         PTR     sys_setxattr                    /* 6180 */
 287         PTR     sys_lsetxattr
 288         PTR     sys_fsetxattr
 289         PTR     sys_getxattr
 290         PTR     sys_lgetxattr
 291         PTR     sys_fgetxattr                   /* 6185 */
 292         PTR     sys_listxattr
 293         PTR     sys_llistxattr
 294         PTR     sys_flistxattr
 295         PTR     sys_removexattr
 296         PTR     sys_lremovexattr                /* 6190 */
 297         PTR     sys_fremovexattr
 298         PTR     sys_tkill
 299         PTR     sys_ni_syscall
 300         PTR     compat_sys_futex
 301         PTR     compat_sys_sched_setaffinity    /* 6195 */
 302         PTR     compat_sys_sched_getaffinity
 303         PTR     sys_cacheflush
 304         PTR     sys_cachectl
 305         PTR     sys_sysmips
 306         PTR     compat_sys_io_setup                     /* 6200 */
 307         PTR     sys_io_destroy
 308         PTR     compat_sys_io_getevents
 309         PTR     compat_sys_io_submit
 310         PTR     sys_io_cancel
 311         PTR     sys_exit_group                  /* 6205 */
 312         PTR     sys_lookup_dcookie
 313         PTR     sys_epoll_create
 314         PTR     sys_epoll_ctl
 315         PTR     sys_epoll_wait
 316         PTR     sys_remap_file_pages            /* 6210 */
 317         PTR     sysn32_rt_sigreturn
 318         PTR     compat_sys_fcntl64
 319         PTR     sys_set_tid_address
 320         PTR     sys_restart_syscall
 321         PTR     compat_sys_semtimedop                   /* 6215 */
 322         PTR     sys_fadvise64_64
 323         PTR     compat_sys_statfs64
 324         PTR     compat_sys_fstatfs64
 325         PTR     sys_sendfile64
 326         PTR     compat_sys_timer_create         /* 6220 */
 327         PTR     compat_sys_timer_settime
 328         PTR     compat_sys_timer_gettime
 329         PTR     sys_timer_getoverrun
 330         PTR     sys_timer_delete
 331         PTR     compat_sys_clock_settime                /* 6225 */
 332         PTR     compat_sys_clock_gettime
 333         PTR     compat_sys_clock_getres
 334         PTR     compat_sys_clock_nanosleep
 335         PTR     sys_tgkill
 336         PTR     compat_sys_utimes               /* 6230 */
 337         PTR     compat_sys_mbind
 338         PTR     compat_sys_get_mempolicy
 339         PTR     compat_sys_set_mempolicy
 340         PTR     compat_sys_mq_open
 341         PTR     sys_mq_unlink                   /* 6235 */
 342         PTR     compat_sys_mq_timedsend
 343         PTR     compat_sys_mq_timedreceive
 344         PTR     compat_sys_mq_notify
 345         PTR     compat_sys_mq_getsetattr
 346         PTR     sys_ni_syscall                  /* 6240, sys_vserver */
 347         PTR     compat_sys_waitid
 348         PTR     sys_ni_syscall                  /* available, was setaltroot */
 349         PTR     sys_add_key
 350         PTR     sys_request_key
 351         PTR     compat_sys_keyctl               /* 6245 */
 352         PTR     sys_set_thread_area
 353         PTR     sys_inotify_init
 354         PTR     sys_inotify_add_watch
 355         PTR     sys_inotify_rm_watch
 356         PTR     compat_sys_migrate_pages        /* 6250 */
 357         PTR     sys_openat
 358         PTR     sys_mkdirat
 359         PTR     sys_mknodat
 360         PTR     sys_fchownat
 361         PTR     compat_sys_futimesat            /* 6255 */
 362         PTR     sys_newfstatat
 363         PTR     sys_unlinkat
 364         PTR     sys_renameat
 365         PTR     sys_linkat
 366         PTR     sys_symlinkat                   /* 6260 */
 367         PTR     sys_readlinkat
 368         PTR     sys_fchmodat
 369         PTR     sys_faccessat
 370         PTR     compat_sys_pselect6
 371         PTR     compat_sys_ppoll                /* 6265 */
 372         PTR     sys_unshare
 373         PTR     sys_splice
 374         PTR     sys_sync_file_range
 375         PTR     sys_tee
 376         PTR     compat_sys_vmsplice             /* 6270 */
 377         PTR     compat_sys_move_pages
 378         PTR     compat_sys_set_robust_list
 379         PTR     compat_sys_get_robust_list
 380         PTR     compat_sys_kexec_load
 381         PTR     sys_getcpu                      /* 6275 */
 382         PTR     compat_sys_epoll_pwait
 383         PTR     sys_ioprio_set
 384         PTR     sys_ioprio_get
 385         PTR     compat_sys_utimensat
 386         PTR     compat_sys_signalfd             /* 6280 */
 387         PTR     sys_ni_syscall                  /* was timerfd */
 388         PTR     sys_eventfd
 389         PTR     sys_fallocate
 390         PTR     sys_timerfd_create
 391         PTR     compat_sys_timerfd_gettime      /* 6285 */
 392         PTR     compat_sys_timerfd_settime
 393         PTR     compat_sys_signalfd4
 394         PTR     sys_eventfd2
 395         PTR     sys_epoll_create1
 396         PTR     sys_dup3                        /* 6290 */
 397         PTR     sys_pipe2
 398         PTR     sys_inotify_init1
 399         PTR     compat_sys_preadv
 400         PTR     compat_sys_pwritev
 401         PTR     compat_sys_rt_tgsigqueueinfo    /* 6295 */
 402         PTR     sys_perf_event_open
 403         PTR     sys_accept4
 404         PTR     compat_sys_recvmmsg
 405         PTR     sys_getdents64
 406         PTR     sys_fanotify_init               /* 6300 */
 407         PTR     sys_fanotify_mark
 408         PTR     sys_prlimit64
 409         PTR     sys_name_to_handle_at
 410         PTR     sys_open_by_handle_at
 411         PTR     compat_sys_clock_adjtime        /* 6305 */
 412         PTR     sys_syncfs
 413         PTR     compat_sys_sendmmsg
 414         PTR     sys_setns
 415         PTR     compat_sys_process_vm_readv
 416         PTR     compat_sys_process_vm_writev    /* 6310 */
 417         PTR     sys_kcmp
 418         PTR     sys_finit_module
 419         PTR     sys_sched_setattr
 420         PTR     sys_sched_getattr
 421         PTR     sys_renameat2                   /* 6315 */
 422         PTR     sys_seccomp
 423         PTR     sys_getrandom
 424         PTR     sys_memfd_create
 425         PTR     sys_bpf
 426         PTR     compat_sys_execveat             /* 6320 */
 427         PTR     sys_userfaultfd
 428         PTR     sys_membarrier
 429         PTR     sys_mlock2
 430         PTR     sys_copy_file_range
 431         PTR     compat_sys_preadv2              /* 6325 */
 432         PTR     compat_sys_pwritev2
 433         PTR     sys_pkey_mprotect
 434         PTR     sys_pkey_alloc
 435         PTR     sys_pkey_free
 436         PTR     sys_statx                       /* 6330 */
 437         .size   sysn32_call_table,.-sysn32_call_table