LXR linux/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
  26NESTED(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
  52syscall_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
  661:      sd      v0, PT_R2(sp)           # result
  67
  68        j       syscall_exit_partial
  69
  70/* ------------------------------------------------------------------------ */
  71
  72n32_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
  951:      j       syscall_exit
  96
  97not_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
 105EXPORT(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
 438