arch/mips/kernel/scall64-o32.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 - 2000, 2001 by Ralf Baechle
   7  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
   8  * Copyright (C) 2001 MIPS Technologies, Inc.
   9  * Copyright (C) 2004 Thiemo Seufer
  10  *
  11  * Hairy, the userspace application uses a different argument passing
  12  * convention than the kernel, so we have to translate things from o32
  13  * to ABI64 calling convention.  64-bit syscalls are also processed
  14  * here for now.
  15  */
  16 #include <linux/errno.h>
  17 #include <asm/asm.h>
  18 #include <asm/asmmacro.h>
  19 #include <asm/irqflags.h>
  20 #include <asm/mipsregs.h>
  21 #include <asm/regdef.h>
  22 #include <asm/stackframe.h>
  23 #include <asm/thread_info.h>
  24 #include <asm/unistd.h>
  25 #include <asm/sysmips.h>
  26
  27         .align  5
  28 NESTED(handle_sys, PT_SIZE, sp)
  29         .set    noat
  30         SAVE_SOME
  31         TRACE_IRQS_ON_RELOAD
  32         STI
  33         .set    at
  34         ld      t1, PT_EPC(sp)          # skip syscall on return
  35
  36         dsubu   t0, v0, __NR_O32_Linux  # check syscall number
  37         sltiu   t0, t0, __NR_O32_Linux_syscalls + 1
  38         daddiu  t1, 4                   # skip to next instruction
  39         sd      t1, PT_EPC(sp)
  40         beqz    t0, not_o32_scall
  41 #if 0
  42  SAVE_ALL
  43  move a1, v0
  44  PRINT("Scall %ld\n")
  45  RESTORE_ALL
  46 #endif
  47
  48         /* We don't want to stumble over broken sign extensions from
  49            userland. O32 does never use the upper half. */
  50         sll     a0, a0, 0
  51         sll     a1, a1, 0
  52         sll     a2, a2, 0
  53         sll     a3, a3, 0
  54
  55         dsll    t0, v0, 3               # offset into table
  56         ld      t2, (sys32_call_table - (__NR_O32_Linux * 8))(t0)
  57
  58         sd      a3, PT_R26(sp)          # save a3 for syscall restarting
  59
  60         /*
  61          * More than four arguments.  Try to deal with it by copying the
  62          * stack arguments from the user stack to the kernel stack.
  63          * This Sucks (TM).
  64          *
  65          * We intentionally keep the kernel stack a little below the top of
  66          * userspace so we don't have to do a slower byte accurate check here.
  67          */
  68         ld      t0, PT_R29(sp)          # get old user stack pointer
  69         daddu   t1, t0, 32
  70         bltz    t1, bad_stack
  71
  72 load_a4: lw     a4, 16(t0)              # argument #5 from usp
  73 load_a5: lw     a5, 20(t0)              # argument #6 from usp
  74 load_a6: lw     a6, 24(t0)              # argument #7 from usp
  75 load_a7: lw     a7, 28(t0)              # argument #8 from usp
  76 loads_done:
  77
  78         .section __ex_table,"a"
  79         PTR     load_a4, bad_stack_a4
  80         PTR     load_a5, bad_stack_a5
  81         PTR     load_a6, bad_stack_a6
  82         PTR     load_a7, bad_stack_a7
  83         .previous
  84
  85         li      t1, _TIF_WORK_SYSCALL_ENTRY
  86         LONG_L  t0, TI_FLAGS($28)       # syscall tracing enabled?
  87         and     t0, t1, t0
  88         bnez    t0, trace_a_syscall
  89
  90 syscall_common:
  91         jalr    t2                      # Do The Real Thing (TM)
  92
  93         li      t0, -EMAXERRNO - 1      # error?
  94         sltu    t0, t0, v0
  95         sd      t0, PT_R7(sp)           # set error flag
  96         beqz    t0, 1f
  97
  98         ld      t1, PT_R2(sp)           # syscall number
  99         dnegu   v0                      # error
 100         sd      t1, PT_R0(sp)           # save it for syscall restarting
 101 1:      sd      v0, PT_R2(sp)           # result
 102
 103 o32_syscall_exit:
 104         j       syscall_exit_partial
 105
 106 /* ------------------------------------------------------------------------ */
 107
 108 trace_a_syscall:
 109         SAVE_STATIC
 110         sd      a4, PT_R8(sp)           # Save argument registers
 111         sd      a5, PT_R9(sp)
 112         sd      a6, PT_R10(sp)
 113         sd      a7, PT_R11(sp)          # For indirect syscalls
 114
 115         move    s0, t2                  # Save syscall pointer
 116         move    a0, sp
 117         /*
 118          * absolute syscall number is in v0 unless we called syscall(__NR_###)
 119          * where the real syscall number is in a0
 120          * note: NR_syscall is the first O32 syscall but the macro is
 121          * only defined when compiling with -mabi=32 (CONFIG_32BIT)
 122          * therefore __NR_O32_Linux is used (4000)
 123          */
 124         .set    push
 125         .set    reorder
 126         subu    t1, v0,  __NR_O32_Linux
 127         move    a1, v0
 128         bnez    t1, 1f /* __NR_syscall at offset 0 */
 129         lw      a1, PT_R4(sp) /* Arg1 for __NR_syscall case */
 130         .set    pop
 131
 132 1:      jal     syscall_trace_enter
 133
 134         bltz    v0, 1f                  # seccomp failed? Skip syscall
 135
 136         move    t2, s0
 137         RESTORE_STATIC
 138         ld      a0, PT_R4(sp)           # Restore argument registers
 139         ld      a1, PT_R5(sp)
 140         ld      a2, PT_R6(sp)
 141         ld      a3, PT_R7(sp)
 142         ld      a4, PT_R8(sp)
 143         ld      a5, PT_R9(sp)
 144         ld      a6, PT_R10(sp)
 145         ld      a7, PT_R11(sp)          # For indirect syscalls
 146         j       syscall_common
 147
 148 1:      j       syscall_exit
 149
 150 /* ------------------------------------------------------------------------ */
 151
 152         /*
 153          * The stackpointer for a call with more than 4 arguments is bad.
 154          */
 155 bad_stack:
 156         li      v0, EFAULT
 157         sd      v0, PT_R2(sp)
 158         li      t0, 1                   # set error flag
 159         sd      t0, PT_R7(sp)
 160         j       o32_syscall_exit
 161
 162 bad_stack_a4:
 163         li      a4, 0
 164         b       load_a5
 165
 166 bad_stack_a5:
 167         li      a5, 0
 168         b       load_a6
 169
 170 bad_stack_a6:
 171         li      a6, 0
 172         b       load_a7
 173
 174 bad_stack_a7:
 175         li      a7, 0
 176         b       loads_done
 177
 178 not_o32_scall:
 179         /*
 180          * This is not an o32 compatibility syscall, pass it on
 181          * to the 64-bit syscall handlers.
 182          */
 183 #ifdef CONFIG_MIPS32_N32
 184         j       handle_sysn32
 185 #else
 186         j       handle_sys64
 187 #endif
 188         END(handle_sys)
 189
 190 LEAF(sys32_syscall)
 191         subu    t0, a0, __NR_O32_Linux  # check syscall number
 192         sltiu   v0, t0, __NR_O32_Linux_syscalls + 1
 193         beqz    t0, einval              # do not recurse
 194         dsll    t1, t0, 3
 195         beqz    v0, einval
 196         ld      t2, sys32_call_table(t1)                # syscall routine
 197         sd      a0, PT_R2(sp)           # call routine directly on restart
 198
 199         move    a0, a1                  # shift argument registers
 200         move    a1, a2
 201         move    a2, a3
 202         move    a3, a4
 203         move    a4, a5
 204         move    a5, a6
 205         move    a6, a7
 206         sd      a0, PT_R4(sp)           # ... and push back a0 - a3, some
 207         sd      a1, PT_R5(sp)           # syscalls expect them there
 208         sd      a2, PT_R6(sp)
 209         sd      a3, PT_R7(sp)
 210         sd      a3, PT_R26(sp)          # update a3 for syscall restarting
 211         jr      t2
 212         /* Unreached */
 213
 214 einval: li      v0, -ENOSYS
 215         jr      ra
 216         END(sys32_syscall)
 217
 218         .align  3
 219         .type   sys32_call_table,@object
 220 EXPORT(sys32_call_table)
 221         PTR     sys32_syscall                   /* 4000 */
 222         PTR     sys_exit
 223         PTR     __sys_fork
 224         PTR     sys_read
 225         PTR     sys_write
 226         PTR     compat_sys_open                 /* 4005 */
 227         PTR     sys_close
 228         PTR     sys_waitpid
 229         PTR     sys_creat
 230         PTR     sys_link
 231         PTR     sys_unlink                      /* 4010 */
 232         PTR     compat_sys_execve
 233         PTR     sys_chdir
 234         PTR     compat_sys_time
 235         PTR     sys_mknod
 236         PTR     sys_chmod                       /* 4015 */
 237         PTR     sys_lchown
 238         PTR     sys_ni_syscall
 239         PTR     sys_ni_syscall                  /* was sys_stat */
 240         PTR     sys_lseek
 241         PTR     sys_getpid                      /* 4020 */
 242         PTR     compat_sys_mount
 243         PTR     sys_oldumount
 244         PTR     sys_setuid
 245         PTR     sys_getuid
 246         PTR     compat_sys_stime                /* 4025 */
 247         PTR     compat_sys_ptrace
 248         PTR     sys_alarm
 249         PTR     sys_ni_syscall                  /* was sys_fstat */
 250         PTR     sys_pause
 251         PTR     compat_sys_utime                /* 4030 */
 252         PTR     sys_ni_syscall
 253         PTR     sys_ni_syscall
 254         PTR     sys_access
 255         PTR     sys_nice
 256         PTR     sys_ni_syscall                  /* 4035 */
 257         PTR     sys_sync
 258         PTR     sys_kill
 259         PTR     sys_rename
 260         PTR     sys_mkdir
 261         PTR     sys_rmdir                       /* 4040 */
 262         PTR     sys_dup
 263         PTR     sysm_pipe
 264         PTR     compat_sys_times
 265         PTR     sys_ni_syscall
 266         PTR     sys_brk                         /* 4045 */
 267         PTR     sys_setgid
 268         PTR     sys_getgid
 269         PTR     sys_ni_syscall                  /* was signal   2 */
 270         PTR     sys_geteuid
 271         PTR     sys_getegid                     /* 4050 */
 272         PTR     sys_acct
 273         PTR     sys_umount
 274         PTR     sys_ni_syscall
 275         PTR     compat_sys_ioctl
 276         PTR     compat_sys_fcntl                /* 4055 */
 277         PTR     sys_ni_syscall
 278         PTR     sys_setpgid
 279         PTR     sys_ni_syscall
 280         PTR     sys_olduname
 281         PTR     sys_umask                       /* 4060 */
 282         PTR     sys_chroot
 283         PTR     compat_sys_ustat
 284         PTR     sys_dup2
 285         PTR     sys_getppid
 286         PTR     sys_getpgrp                     /* 4065 */
 287         PTR     sys_setsid
 288         PTR     sys_32_sigaction
 289         PTR     sys_sgetmask
 290         PTR     sys_ssetmask
 291         PTR     sys_setreuid                    /* 4070 */
 292         PTR     sys_setregid
 293         PTR     sys32_sigsuspend
 294         PTR     compat_sys_sigpending
 295         PTR     sys_sethostname
 296         PTR     compat_sys_setrlimit            /* 4075 */
 297         PTR     compat_sys_getrlimit
 298         PTR     compat_sys_getrusage
 299         PTR     compat_sys_gettimeofday
 300         PTR     compat_sys_settimeofday
 301         PTR     sys_getgroups                   /* 4080 */
 302         PTR     sys_setgroups
 303         PTR     sys_ni_syscall                  /* old_select */
 304         PTR     sys_symlink
 305         PTR     sys_ni_syscall                  /* was sys_lstat */
 306         PTR     sys_readlink                    /* 4085 */
 307         PTR     sys_uselib
 308         PTR     sys_swapon
 309         PTR     sys_reboot
 310         PTR     compat_sys_old_readdir
 311         PTR     sys_mips_mmap                   /* 4090 */
 312         PTR     sys_munmap
 313         PTR     compat_sys_truncate
 314         PTR     compat_sys_ftruncate
 315         PTR     sys_fchmod
 316         PTR     sys_fchown                      /* 4095 */
 317         PTR     sys_getpriority
 318         PTR     sys_setpriority
 319         PTR     sys_ni_syscall
 320         PTR     compat_sys_statfs
 321         PTR     compat_sys_fstatfs              /* 4100 */
 322         PTR     sys_ni_syscall                  /* sys_ioperm */
 323         PTR     compat_sys_socketcall
 324         PTR     sys_syslog
 325         PTR     compat_sys_setitimer
 326         PTR     compat_sys_getitimer            /* 4105 */
 327         PTR     compat_sys_newstat
 328         PTR     compat_sys_newlstat
 329         PTR     compat_sys_newfstat
 330         PTR     sys_uname
 331         PTR     sys_ni_syscall                  /* sys_ioperm  *//* 4110 */
 332         PTR     sys_vhangup
 333         PTR     sys_ni_syscall                  /* was sys_idle  */
 334         PTR     sys_ni_syscall                  /* sys_vm86 */
 335         PTR     compat_sys_wait4
 336         PTR     sys_swapoff                     /* 4115 */
 337         PTR     compat_sys_sysinfo
 338         PTR     compat_sys_ipc
 339         PTR     sys_fsync
 340         PTR     sys32_sigreturn
 341         PTR     __sys_clone                     /* 4120 */
 342         PTR     sys_setdomainname
 343         PTR     sys_newuname
 344         PTR     sys_ni_syscall                  /* sys_modify_ldt */
 345         PTR     compat_sys_adjtimex
 346         PTR     sys_mprotect                    /* 4125 */
 347         PTR     compat_sys_sigprocmask
 348         PTR     sys_ni_syscall                  /* was creat_module */
 349         PTR     sys_init_module
 350         PTR     sys_delete_module
 351         PTR     sys_ni_syscall                  /* 4130, get_kernel_syms */
 352         PTR     sys_quotactl
 353         PTR     sys_getpgid
 354         PTR     sys_fchdir
 355         PTR     sys_bdflush
 356         PTR     sys_sysfs                       /* 4135 */
 357         PTR     sys_32_personality
 358         PTR     sys_ni_syscall                  /* for afs_syscall */
 359         PTR     sys_setfsuid
 360         PTR     sys_setfsgid
 361         PTR     sys_32_llseek                   /* 4140 */
 362         PTR     compat_sys_getdents
 363         PTR     compat_sys_select
 364         PTR     sys_flock
 365         PTR     sys_msync
 366         PTR     compat_sys_readv                /* 4145 */
 367         PTR     compat_sys_writev
 368         PTR     sys_cacheflush
 369         PTR     sys_cachectl
 370         PTR     sys_sysmips
 371         PTR     sys_ni_syscall                  /* 4150 */
 372         PTR     sys_getsid
 373         PTR     sys_fdatasync
 374         PTR     compat_sys_sysctl
 375         PTR     sys_mlock
 376         PTR     sys_munlock                     /* 4155 */
 377         PTR     sys_mlockall
 378         PTR     sys_munlockall
 379         PTR     sys_sched_setparam
 380         PTR     sys_sched_getparam
 381         PTR     sys_sched_setscheduler          /* 4160 */
 382         PTR     sys_sched_getscheduler
 383         PTR     sys_sched_yield
 384         PTR     sys_sched_get_priority_max
 385         PTR     sys_sched_get_priority_min
 386         PTR     compat_sys_sched_rr_get_interval        /* 4165 */
 387         PTR     compat_sys_nanosleep
 388         PTR     sys_mremap
 389         PTR     sys_accept
 390         PTR     sys_bind
 391         PTR     sys_connect                     /* 4170 */
 392         PTR     sys_getpeername
 393         PTR     sys_getsockname
 394         PTR     compat_sys_getsockopt
 395         PTR     sys_listen
 396         PTR     compat_sys_recv                 /* 4175 */
 397         PTR     compat_sys_recvfrom
 398         PTR     compat_sys_recvmsg
 399         PTR     sys_send
 400         PTR     compat_sys_sendmsg
 401         PTR     sys_sendto                      /* 4180 */
 402         PTR     compat_sys_setsockopt
 403         PTR     sys_shutdown
 404         PTR     sys_socket
 405         PTR     sys_socketpair
 406         PTR     sys_setresuid                   /* 4185 */
 407         PTR     sys_getresuid
 408         PTR     sys_ni_syscall                  /* was query_module */
 409         PTR     sys_poll
 410         PTR     sys_ni_syscall                  /* was nfsservctl */
 411         PTR     sys_setresgid                   /* 4190 */
 412         PTR     sys_getresgid
 413         PTR     sys_prctl
 414         PTR     sys32_rt_sigreturn
 415         PTR     compat_sys_rt_sigaction
 416         PTR     compat_sys_rt_sigprocmask       /* 4195 */
 417         PTR     compat_sys_rt_sigpending
 418         PTR     compat_sys_rt_sigtimedwait
 419         PTR     compat_sys_rt_sigqueueinfo
 420         PTR     compat_sys_rt_sigsuspend
 421         PTR     sys_32_pread                    /* 4200 */
 422         PTR     sys_32_pwrite
 423         PTR     sys_chown
 424         PTR     sys_getcwd
 425         PTR     sys_capget
 426         PTR     sys_capset                      /* 4205 */
 427         PTR     compat_sys_sigaltstack
 428         PTR     compat_sys_sendfile
 429         PTR     sys_ni_syscall
 430         PTR     sys_ni_syscall
 431         PTR     sys_mips_mmap2                  /* 4210 */
 432         PTR     sys_32_truncate64
 433         PTR     sys_32_ftruncate64
 434         PTR     sys_newstat
 435         PTR     sys_newlstat
 436         PTR     sys_newfstat                    /* 4215 */
 437         PTR     sys_pivot_root
 438         PTR     sys_mincore
 439         PTR     sys_madvise
 440         PTR     sys_getdents64
 441         PTR     compat_sys_fcntl64              /* 4220 */
 442         PTR     sys_ni_syscall
 443         PTR     sys_gettid
 444         PTR     sys32_readahead
 445         PTR     sys_setxattr
 446         PTR     sys_lsetxattr                   /* 4225 */
 447         PTR     sys_fsetxattr
 448         PTR     sys_getxattr
 449         PTR     sys_lgetxattr
 450         PTR     sys_fgetxattr
 451         PTR     sys_listxattr                   /* 4230 */
 452         PTR     sys_llistxattr
 453         PTR     sys_flistxattr
 454         PTR     sys_removexattr
 455         PTR     sys_lremovexattr
 456         PTR     sys_fremovexattr                /* 4235 */
 457         PTR     sys_tkill
 458         PTR     sys_sendfile64
 459         PTR     compat_sys_futex
 460         PTR     compat_sys_sched_setaffinity
 461         PTR     compat_sys_sched_getaffinity    /* 4240 */
 462         PTR     compat_sys_io_setup
 463         PTR     sys_io_destroy
 464         PTR     compat_sys_io_getevents
 465         PTR     compat_sys_io_submit
 466         PTR     sys_io_cancel                   /* 4245 */
 467         PTR     sys_exit_group
 468         PTR     compat_sys_lookup_dcookie
 469         PTR     sys_epoll_create
 470         PTR     sys_epoll_ctl
 471         PTR     sys_epoll_wait                  /* 4250 */
 472         PTR     sys_remap_file_pages
 473         PTR     sys_set_tid_address
 474         PTR     sys_restart_syscall
 475         PTR     sys32_fadvise64_64
 476         PTR     compat_sys_statfs64             /* 4255 */
 477         PTR     compat_sys_fstatfs64
 478         PTR     compat_sys_timer_create
 479         PTR     compat_sys_timer_settime
 480         PTR     compat_sys_timer_gettime
 481         PTR     sys_timer_getoverrun            /* 4260 */
 482         PTR     sys_timer_delete
 483         PTR     compat_sys_clock_settime
 484         PTR     compat_sys_clock_gettime
 485         PTR     compat_sys_clock_getres
 486         PTR     compat_sys_clock_nanosleep      /* 4265 */
 487         PTR     sys_tgkill
 488         PTR     compat_sys_utimes
 489         PTR     compat_sys_mbind
 490         PTR     compat_sys_get_mempolicy
 491         PTR     compat_sys_set_mempolicy        /* 4270 */
 492         PTR     compat_sys_mq_open
 493         PTR     sys_mq_unlink
 494         PTR     compat_sys_mq_timedsend
 495         PTR     compat_sys_mq_timedreceive
 496         PTR     compat_sys_mq_notify            /* 4275 */
 497         PTR     compat_sys_mq_getsetattr
 498         PTR     sys_ni_syscall                  /* sys_vserver */
 499         PTR     compat_sys_waitid
 500         PTR     sys_ni_syscall                  /* available, was setaltroot */
 501         PTR     sys_add_key                     /* 4280 */
 502         PTR     sys_request_key
 503         PTR     sys_keyctl
 504         PTR     sys_set_thread_area
 505         PTR     sys_inotify_init
 506         PTR     sys_inotify_add_watch           /* 4285 */
 507         PTR     sys_inotify_rm_watch
 508         PTR     compat_sys_migrate_pages
 509         PTR     compat_sys_openat
 510         PTR     sys_mkdirat
 511         PTR     sys_mknodat                     /* 4290 */
 512         PTR     sys_fchownat
 513         PTR     compat_sys_futimesat
 514         PTR     sys_newfstatat
 515         PTR     sys_unlinkat
 516         PTR     sys_renameat                    /* 4295 */
 517         PTR     sys_linkat
 518         PTR     sys_symlinkat
 519         PTR     sys_readlinkat
 520         PTR     sys_fchmodat
 521         PTR     sys_faccessat                   /* 4300 */
 522         PTR     compat_sys_pselect6
 523         PTR     compat_sys_ppoll
 524         PTR     sys_unshare
 525         PTR     sys_splice
 526         PTR     sys32_sync_file_range           /* 4305 */
 527         PTR     sys_tee
 528         PTR     compat_sys_vmsplice
 529         PTR     compat_sys_move_pages
 530         PTR     compat_sys_set_robust_list
 531         PTR     compat_sys_get_robust_list      /* 4310 */
 532         PTR     compat_sys_kexec_load
 533         PTR     sys_getcpu
 534         PTR     compat_sys_epoll_pwait
 535         PTR     sys_ioprio_set
 536         PTR     sys_ioprio_get                  /* 4315 */
 537         PTR     compat_sys_utimensat
 538         PTR     compat_sys_signalfd
 539         PTR     sys_ni_syscall                  /* was timerfd */
 540         PTR     sys_eventfd
 541         PTR     sys32_fallocate                 /* 4320 */
 542         PTR     sys_timerfd_create
 543         PTR     compat_sys_timerfd_gettime
 544         PTR     compat_sys_timerfd_settime
 545         PTR     compat_sys_signalfd4
 546         PTR     sys_eventfd2                    /* 4325 */
 547         PTR     sys_epoll_create1
 548         PTR     sys_dup3
 549         PTR     sys_pipe2
 550         PTR     sys_inotify_init1
 551         PTR     compat_sys_preadv               /* 4330 */
 552         PTR     compat_sys_pwritev
 553         PTR     compat_sys_rt_tgsigqueueinfo
 554         PTR     sys_perf_event_open
 555         PTR     sys_accept4
 556         PTR     compat_sys_recvmmsg             /* 4335 */
 557         PTR     sys_fanotify_init
 558         PTR     compat_sys_fanotify_mark
 559         PTR     sys_prlimit64
 560         PTR     sys_name_to_handle_at
 561         PTR     compat_sys_open_by_handle_at    /* 4340 */
 562         PTR     compat_sys_clock_adjtime
 563         PTR     sys_syncfs
 564         PTR     compat_sys_sendmmsg
 565         PTR     sys_setns
 566         PTR     compat_sys_process_vm_readv     /* 4345 */
 567         PTR     compat_sys_process_vm_writev
 568         PTR     sys_kcmp
 569         PTR     sys_finit_module
 570         PTR     sys_sched_setattr
 571         PTR     sys_sched_getattr               /* 4350 */
 572         PTR     sys_renameat2
 573         PTR     sys_seccomp
 574         PTR     sys_getrandom
 575         PTR     sys_memfd_create
 576         PTR     sys_bpf                         /* 4355 */
 577         PTR     compat_sys_execveat
 578         PTR     sys_userfaultfd
 579         PTR     sys_membarrier
 580         PTR     sys_mlock2
 581         PTR     sys_copy_file_range             /* 4360 */
 582         .size   sys32_call_table,.-sys32_call_table