arch/x86_64/ia32/ia32entry.S

   1 /*
   2  * Compatibility mode system call entry point for x86-64.
   3  *
   4  * Copyright 2000-2002 Andi Kleen, SuSE Labs.
   5  */
   6
   7 #include <asm/dwarf2.h>
   8 #include <asm/calling.h>
   9 #include <asm/offset.h>
  10 #include <asm/current.h>
  11 #include <asm/errno.h>
  12 #include <asm/ia32_unistd.h>
  13 #include <asm/thread_info.h>
  14 #include <asm/segment.h>
  15 #include <asm/vsyscall32.h>
  16 #include <linux/linkage.h>
  17
  18         .macro IA32_ARG_FIXUP noebp=0
  19         movl    %edi,%r8d
  20         .if \noebp
  21         .else
  22         movl    %ebp,%r9d
  23         .endif
  24         xchg    %ecx,%esi
  25         movl    %ebx,%edi
  26         movl    %edx,%edx       /* zero extension */
  27         .endm
  28
  29         /* clobbers %eax */
  30         .macro  CLEAR_RREGS
  31         xorl    %eax,%eax
  32         movq    %rax,R11(%rsp)
  33         movq    %rax,R10(%rsp)
  34         movq    %rax,R9(%rsp)
  35         movq    %rax,R8(%rsp)
  36         .endm
  37
  38 /*
  39  * 32bit SYSENTER instruction entry.
  40  *
  41  * Arguments:
  42  * %eax System call number.
  43  * %ebx Arg1
  44  * %ecx Arg2
  45  * %edx Arg3
  46  * %esi Arg4
  47  * %edi Arg5
  48  * %ebp user stack
  49  * 0(%ebp) Arg6
  50  *
  51  * Interrupts off.
  52  *
  53  * This is purely a fast path. For anything complicated we use the int 0x80
  54  * path below.  Set up a complete hardware stack frame to share code
  55  * with the int 0x80 path.
  56  */
  57 ENTRY(ia32_sysenter_target)
  58         CFI_STARTPROC
  59         swapgs
  60         movq    %gs:pda_kernelstack, %rsp
  61         addq    $(PDA_STACKOFFSET),%rsp
  62         sti
  63         movl    %ebp,%ebp               /* zero extension */
  64         pushq   $__USER32_DS
  65         pushq   %rbp
  66         pushfq
  67         movl    $VSYSCALL32_SYSEXIT, %r10d
  68         pushq   $__USER32_CS
  69         movl    %eax, %eax
  70         pushq   %r10
  71         pushq   %rax
  72         cld
  73         SAVE_ARGS 0,0,1
  74         /* no need to do an access_ok check here because rbp has been
  75            32bit zero extended */
  76 1:      movl    (%rbp),%r9d
  77         .section __ex_table,"a"
  78         .quad 1b,ia32_badarg
  79         .previous
  80         GET_THREAD_INFO(%r10)
  81         testl  $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
  82         jnz  sysenter_tracesys
  83 sysenter_do_call:
  84         cmpl    $(IA32_NR_syscalls),%eax
  85         jae     ia32_badsys
  86         IA32_ARG_FIXUP 1
  87         call    *ia32_sys_call_table(,%rax,8)
  88         movq    %rax,RAX-ARGOFFSET(%rsp)
  89         GET_THREAD_INFO(%r10)
  90         cli
  91         testl   $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
  92         jnz     int_ret_from_sys_call
  93         /* clear IF, that popfq doesn't enable interrupts early */
  94         andl  $~0x200,EFLAGS-R11(%rsp)
  95         RESTORE_ARGS 1,24,1,1,1,1
  96         popfq
  97         popq    %rcx                            /* User %esp */
  98         movl    $VSYSCALL32_SYSEXIT,%edx        /* User %eip */
  99         swapgs
 100         sti             /* sti only takes effect after the next instruction */
 101         /* sysexit */
 102         .byte   0xf, 0x35
 103
 104 sysenter_tracesys:
 105         SAVE_REST
 106         CLEAR_RREGS
 107         movq    $-ENOSYS,RAX(%rsp)      /* really needed? */
 108         movq    %rsp,%rdi        /* &pt_regs -> arg1 */
 109         call    syscall_trace_enter
 110         LOAD_ARGS ARGOFFSET  /* reload args from stack in case ptrace changed it */
 111         RESTORE_REST
 112         movl    %ebp, %ebp
 113         /* no need to do an access_ok check here because rbp has been
 114            32bit zero extended */
 115 1:      movl    (%rbp),%r9d
 116         .section __ex_table,"a"
 117         .quad 1b,ia32_badarg
 118         .previous
 119         jmp     sysenter_do_call
 120         CFI_ENDPROC
 121
 122 /*
 123  * 32bit SYSCALL instruction entry.
 124  *
 125  * Arguments:
 126  * %eax System call number.
 127  * %ebx Arg1
 128  * %ecx return EIP
 129  * %edx Arg3
 130  * %esi Arg4
 131  * %edi Arg5
 132  * %ebp Arg2    [note: not saved in the stack frame, should not be touched]
 133  * %esp user stack
 134  * 0(%esp) Arg6
 135  *
 136  * Interrupts off.
 137  *
 138  * This is purely a fast path. For anything complicated we use the int 0x80
 139  * path below.  Set up a complete hardware stack frame to share code
 140  * with the int 0x80 path.
 141  */
 142 ENTRY(ia32_cstar_target)
 143         CFI_STARTPROC
 144         swapgs
 145         movl    %esp,%r8d
 146         movq    %gs:pda_kernelstack,%rsp
 147         sti
 148         SAVE_ARGS 8,1,1
 149         movl    %eax,%eax       /* zero extension */
 150         movq    %rax,ORIG_RAX-ARGOFFSET(%rsp)
 151         movq    %rcx,RIP-ARGOFFSET(%rsp)
 152         movq    %rbp,RCX-ARGOFFSET(%rsp) /* this lies slightly to ptrace */
 153         movl    %ebp,%ecx
 154         movq    $__USER32_CS,CS-ARGOFFSET(%rsp)
 155         movq    $__USER32_DS,SS-ARGOFFSET(%rsp)
 156         movq    %r11,EFLAGS-ARGOFFSET(%rsp)
 157         movq    %r8,RSP-ARGOFFSET(%rsp)
 158         /* no need to do an access_ok check here because r8 has been
 159            32bit zero extended */
 160         /* hardware stack frame is complete now */
 161 1:      movl    (%r8),%r9d
 162         .section __ex_table,"a"
 163         .quad 1b,ia32_badarg
 164         .previous
 165         GET_THREAD_INFO(%r10)
 166         testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
 167         jnz   cstar_tracesys
 168 cstar_do_call:
 169         cmpl $IA32_NR_syscalls,%eax
 170         jae  ia32_badsys
 171         IA32_ARG_FIXUP 1
 172         call *ia32_sys_call_table(,%rax,8)
 173         movq %rax,RAX-ARGOFFSET(%rsp)
 174         GET_THREAD_INFO(%r10)
 175         cli
 176         testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
 177         jnz  int_ret_from_sys_call
 178         RESTORE_ARGS 1,-ARG_SKIP,1,1,1
 179         movl RIP-ARGOFFSET(%rsp),%ecx
 180         movl EFLAGS-ARGOFFSET(%rsp),%r11d
 181         movl RSP-ARGOFFSET(%rsp),%esp
 182         swapgs
 183         sysretl
 184
 185 cstar_tracesys:
 186         SAVE_REST
 187         CLEAR_RREGS
 188         movq $-ENOSYS,RAX(%rsp) /* really needed? */
 189         movq %rsp,%rdi        /* &pt_regs -> arg1 */
 190         call syscall_trace_enter
 191         LOAD_ARGS ARGOFFSET  /* reload args from stack in case ptrace changed it */
 192         RESTORE_REST
 193         movl RSP-ARGOFFSET(%rsp), %r8d
 194         /* no need to do an access_ok check here because r8 has been
 195            32bit zero extended */
 196 1:      movl    (%r8),%r9d
 197         .section __ex_table,"a"
 198         .quad 1b,ia32_badarg
 199         .previous
 200         jmp cstar_do_call
 201
 202 ia32_badarg:
 203         movq $-EFAULT,%rax
 204         jmp ia32_sysret
 205         CFI_ENDPROC
 206
 207 /*
 208  * Emulated IA32 system calls via int 0x80.
 209  *
 210  * Arguments:
 211  * %eax System call number.
 212  * %ebx Arg1
 213  * %ecx Arg2
 214  * %edx Arg3
 215  * %esi Arg4
 216  * %edi Arg5
 217  * %ebp Arg6    [note: not saved in the stack frame, should not be touched]
 218  *
 219  * Notes:
 220  * Uses the same stack frame as the x86-64 version.
 221  * All registers except %eax must be saved (but ptrace may violate that)
 222  * Arguments are zero extended. For system calls that want sign extension and
 223  * take long arguments a wrapper is needed. Most calls can just be called
 224  * directly.
 225  * Assumes it is only called from user space and entered with interrupts off.
 226  */
 227
 228 ENTRY(ia32_syscall)
 229         CFI_STARTPROC
 230         swapgs
 231         sti
 232         movl %eax,%eax
 233         pushq %rax
 234         cld
 235         /* note the registers are not zero extended to the sf.
 236            this could be a problem. */
 237         SAVE_ARGS 0,0,1
 238         GET_THREAD_INFO(%r10)
 239         testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
 240         jnz ia32_tracesys
 241 ia32_do_syscall:
 242         cmpl $(IA32_NR_syscalls),%eax
 243         jae  ia32_badsys
 244         IA32_ARG_FIXUP
 245         call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
 246 ia32_sysret:
 247         movq %rax,RAX-ARGOFFSET(%rsp)
 248         jmp int_ret_from_sys_call
 249
 250 ia32_tracesys:
 251         SAVE_REST
 252         movq $-ENOSYS,RAX(%rsp) /* really needed? */
 253         movq %rsp,%rdi        /* &pt_regs -> arg1 */
 254         call syscall_trace_enter
 255         LOAD_ARGS ARGOFFSET  /* reload args from stack in case ptrace changed it */
 256         RESTORE_REST
 257         jmp ia32_do_syscall
 258
 259 ia32_badsys:
 260         movq $0,ORIG_RAX-ARGOFFSET(%rsp)
 261         movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
 262         jmp int_ret_from_sys_call
 263
 264 ni_syscall:
 265         movq %rax,%rdi
 266         jmp  sys32_ni_syscall
 267
 268 quiet_ni_syscall:
 269         movq $-ENOSYS,%rax
 270         ret
 271         CFI_ENDPROC
 272
 273         .macro PTREGSCALL label, func, arg
 274         .globl \label
 275 \label:
 276         leaq \func(%rip),%rax
 277         leaq -ARGOFFSET+8(%rsp),\arg    /* 8 for return address */
 278         jmp  ia32_ptregs_common
 279         .endm
 280
 281         PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
 282         PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
 283         PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
 284         PTREGSCALL stub32_sigsuspend, sys32_sigsuspend, %rcx
 285         PTREGSCALL stub32_execve, sys32_execve, %rcx
 286         PTREGSCALL stub32_fork, sys_fork, %rdi
 287         PTREGSCALL stub32_clone, sys32_clone, %rdx
 288         PTREGSCALL stub32_vfork, sys_vfork, %rdi
 289         PTREGSCALL stub32_iopl, sys_iopl, %rsi
 290         PTREGSCALL stub32_rt_sigsuspend, sys_rt_sigsuspend, %rdx
 291
 292 ENTRY(ia32_ptregs_common)
 293         CFI_STARTPROC
 294         popq %r11
 295         SAVE_REST
 296         call *%rax
 297         RESTORE_REST
 298         jmp  ia32_sysret        /* misbalances the return cache */
 299         CFI_ENDPROC
 300
 301         .data
 302         .align 8
 303         .globl ia32_sys_call_table
 304 ia32_sys_call_table:
 305         .quad sys_restart_syscall
 306         .quad sys_exit
 307         .quad stub32_fork
 308         .quad sys_read
 309         .quad sys_write
 310         .quad sys32_open                /* 5 */
 311         .quad sys_close
 312         .quad sys32_waitpid
 313         .quad sys_creat
 314         .quad sys_link
 315         .quad sys_unlink                /* 10 */
 316         .quad stub32_execve
 317         .quad sys_chdir
 318         .quad compat_sys_time
 319         .quad sys_mknod
 320         .quad sys_chmod         /* 15 */
 321         .quad sys_lchown16
 322         .quad quiet_ni_syscall                  /* old break syscall holder */
 323         .quad sys_stat
 324         .quad sys32_lseek
 325         .quad sys_getpid                /* 20 */
 326         .quad compat_sys_mount  /* mount  */
 327         .quad sys_oldumount     /* old_umount  */
 328         .quad sys_setuid16
 329         .quad sys_getuid16
 330         .quad compat_sys_stime  /* stime */             /* 25 */
 331         .quad sys32_ptrace      /* ptrace */
 332         .quad sys_alarm
 333         .quad sys_fstat /* (old)fstat */
 334         .quad sys_pause
 335         .quad compat_sys_utime  /* 30 */
 336         .quad quiet_ni_syscall  /* old stty syscall holder */
 337         .quad quiet_ni_syscall  /* old gtty syscall holder */
 338         .quad sys_access
 339         .quad sys_nice
 340         .quad quiet_ni_syscall  /* 35 */        /* old ftime syscall holder */
 341         .quad sys_sync
 342         .quad sys32_kill
 343         .quad sys_rename
 344         .quad sys_mkdir
 345         .quad sys_rmdir         /* 40 */
 346         .quad sys_dup
 347         .quad sys32_pipe
 348         .quad compat_sys_times
 349         .quad quiet_ni_syscall                  /* old prof syscall holder */
 350         .quad sys_brk           /* 45 */
 351         .quad sys_setgid16
 352         .quad sys_getgid16
 353         .quad sys_signal
 354         .quad sys_geteuid16
 355         .quad sys_getegid16     /* 50 */
 356         .quad sys_acct
 357         .quad sys_umount                        /* new_umount */
 358         .quad quiet_ni_syscall                  /* old lock syscall holder */
 359         .quad compat_sys_ioctl
 360         .quad compat_sys_fcntl64                /* 55 */
 361         .quad quiet_ni_syscall                  /* old mpx syscall holder */
 362         .quad sys_setpgid
 363         .quad quiet_ni_syscall                  /* old ulimit syscall holder */
 364         .quad sys32_olduname
 365         .quad sys_umask         /* 60 */
 366         .quad sys_chroot
 367         .quad sys32_ustat
 368         .quad sys_dup2
 369         .quad sys_getppid
 370         .quad sys_getpgrp               /* 65 */
 371         .quad sys_setsid
 372         .quad sys32_sigaction
 373         .quad sys_sgetmask
 374         .quad sys_ssetmask
 375         .quad sys_setreuid16    /* 70 */
 376         .quad sys_setregid16
 377         .quad stub32_sigsuspend
 378         .quad compat_sys_sigpending
 379         .quad sys_sethostname
 380         .quad compat_sys_setrlimit      /* 75 */
 381         .quad compat_sys_old_getrlimit  /* old_getrlimit */
 382         .quad compat_sys_getrusage
 383         .quad sys32_gettimeofday
 384         .quad sys32_settimeofday
 385         .quad sys_getgroups16   /* 80 */
 386         .quad sys_setgroups16
 387         .quad sys32_old_select
 388         .quad sys_symlink
 389         .quad sys_lstat
 390         .quad sys_readlink              /* 85 */
 391 #ifdef CONFIG_IA32_AOUT
 392         .quad sys_uselib
 393 #else
 394         .quad quiet_ni_syscall
 395 #endif
 396         .quad sys_swapon
 397         .quad sys_reboot
 398         .quad compat_sys_old_readdir
 399         .quad sys32_mmap                /* 90 */
 400         .quad sys_munmap
 401         .quad sys_truncate
 402         .quad sys_ftruncate
 403         .quad sys_fchmod
 404         .quad sys_fchown16              /* 95 */
 405         .quad sys_getpriority
 406         .quad sys_setpriority
 407         .quad quiet_ni_syscall                  /* old profil syscall holder */
 408         .quad compat_sys_statfs
 409         .quad compat_sys_fstatfs                /* 100 */
 410         .quad sys_ioperm
 411         .quad compat_sys_socketcall
 412         .quad sys_syslog
 413         .quad compat_sys_setitimer
 414         .quad compat_sys_getitimer      /* 105 */
 415         .quad compat_sys_newstat
 416         .quad compat_sys_newlstat
 417         .quad compat_sys_newfstat
 418         .quad sys32_uname
 419         .quad stub32_iopl               /* 110 */
 420         .quad sys_vhangup
 421         .quad quiet_ni_syscall  /* old "idle" system call */
 422         .quad sys32_vm86_warning        /* vm86old */
 423         .quad compat_sys_wait4
 424         .quad sys_swapoff               /* 115 */
 425         .quad sys32_sysinfo
 426         .quad sys32_ipc
 427         .quad sys_fsync
 428         .quad stub32_sigreturn
 429         .quad stub32_clone              /* 120 */
 430         .quad sys_setdomainname
 431         .quad sys_uname
 432         .quad sys_modify_ldt
 433         .quad sys32_adjtimex
 434         .quad sys32_mprotect            /* 125 */
 435         .quad compat_sys_sigprocmask
 436         .quad quiet_ni_syscall          /* create_module */
 437         .quad sys_init_module
 438         .quad sys_delete_module
 439         .quad quiet_ni_syscall          /* 130  get_kernel_syms */
 440         .quad sys_quotactl
 441         .quad sys_getpgid
 442         .quad sys_fchdir
 443         .quad quiet_ni_syscall  /* bdflush */
 444         .quad sys_sysfs         /* 135 */
 445         .quad sys_personality
 446         .quad quiet_ni_syscall  /* for afs_syscall */
 447         .quad sys_setfsuid16
 448         .quad sys_setfsgid16
 449         .quad sys_llseek                /* 140 */
 450         .quad compat_sys_getdents
 451         .quad compat_sys_select
 452         .quad sys_flock
 453         .quad sys_msync
 454         .quad compat_sys_readv          /* 145 */
 455         .quad compat_sys_writev
 456         .quad sys_getsid
 457         .quad sys_fdatasync
 458         .quad sys32_sysctl      /* sysctl */
 459         .quad sys_mlock         /* 150 */
 460         .quad sys_munlock
 461         .quad sys_mlockall
 462         .quad sys_munlockall
 463         .quad sys_sched_setparam
 464         .quad sys_sched_getparam   /* 155 */
 465         .quad sys_sched_setscheduler
 466         .quad sys_sched_getscheduler
 467         .quad sys_sched_yield
 468         .quad sys_sched_get_priority_max
 469         .quad sys_sched_get_priority_min  /* 160 */
 470         .quad sys_sched_rr_get_interval
 471         .quad compat_sys_nanosleep
 472         .quad sys_mremap
 473         .quad sys_setresuid16
 474         .quad sys_getresuid16   /* 165 */
 475         .quad sys32_vm86_warning        /* vm86 */
 476         .quad quiet_ni_syscall  /* query_module */
 477         .quad sys_poll
 478         .quad compat_sys_nfsservctl
 479         .quad sys_setresgid16   /* 170 */
 480         .quad sys_getresgid16
 481         .quad sys_prctl
 482         .quad stub32_rt_sigreturn
 483         .quad sys32_rt_sigaction
 484         .quad sys32_rt_sigprocmask      /* 175 */
 485         .quad sys32_rt_sigpending
 486         .quad compat_sys_rt_sigtimedwait
 487         .quad sys32_rt_sigqueueinfo
 488         .quad stub32_rt_sigsuspend
 489         .quad sys32_pread               /* 180 */
 490         .quad sys32_pwrite
 491         .quad sys_chown16
 492         .quad sys_getcwd
 493         .quad sys_capget
 494         .quad sys_capset
 495         .quad stub32_sigaltstack
 496         .quad sys32_sendfile
 497         .quad quiet_ni_syscall          /* streams1 */
 498         .quad quiet_ni_syscall          /* streams2 */
 499         .quad stub32_vfork            /* 190 */
 500         .quad compat_sys_getrlimit
 501         .quad sys32_mmap2
 502         .quad sys32_truncate64
 503         .quad sys32_ftruncate64
 504         .quad sys32_stat64              /* 195 */
 505         .quad sys32_lstat64
 506         .quad sys32_fstat64
 507         .quad sys_lchown
 508         .quad sys_getuid
 509         .quad sys_getgid                /* 200 */
 510         .quad sys_geteuid
 511         .quad sys_getegid
 512         .quad sys_setreuid
 513         .quad sys_setregid
 514         .quad sys_getgroups     /* 205 */
 515         .quad sys_setgroups
 516         .quad sys_fchown
 517         .quad sys_setresuid
 518         .quad sys_getresuid
 519         .quad sys_setresgid     /* 210 */
 520         .quad sys_getresgid
 521         .quad sys_chown
 522         .quad sys_setuid
 523         .quad sys_setgid
 524         .quad sys_setfsuid              /* 215 */
 525         .quad sys_setfsgid
 526         .quad sys_pivot_root
 527         .quad sys_mincore
 528         .quad sys_madvise
 529         .quad compat_sys_getdents64     /* 220 getdents64 */
 530         .quad compat_sys_fcntl64
 531         .quad quiet_ni_syscall          /* tux */
 532         .quad quiet_ni_syscall          /* security */
 533         .quad sys_gettid
 534         .quad sys_readahead     /* 225 */
 535         .quad sys_setxattr
 536         .quad sys_lsetxattr
 537         .quad sys_fsetxattr
 538         .quad sys_getxattr
 539         .quad sys_lgetxattr     /* 230 */
 540         .quad sys_fgetxattr
 541         .quad sys_listxattr
 542         .quad sys_llistxattr
 543         .quad sys_flistxattr
 544         .quad sys_removexattr   /* 235 */
 545         .quad sys_lremovexattr
 546         .quad sys_fremovexattr
 547         .quad sys_tkill
 548         .quad sys_sendfile64
 549         .quad compat_sys_futex          /* 240 */
 550         .quad compat_sys_sched_setaffinity
 551         .quad compat_sys_sched_getaffinity
 552         .quad sys32_set_thread_area
 553         .quad sys32_get_thread_area
 554         .quad compat_sys_io_setup       /* 245 */
 555         .quad sys_io_destroy
 556         .quad compat_sys_io_getevents
 557         .quad compat_sys_io_submit
 558         .quad sys_io_cancel
 559         .quad sys_fadvise64             /* 250 */
 560         .quad quiet_ni_syscall  /* free_huge_pages */
 561         .quad sys_exit_group
 562         .quad sys32_lookup_dcookie
 563         .quad sys_epoll_create
 564         .quad sys_epoll_ctl             /* 255 */
 565         .quad sys_epoll_wait
 566         .quad sys_remap_file_pages
 567         .quad sys_set_tid_address
 568         .quad sys32_timer_create
 569         .quad compat_sys_timer_settime  /* 260 */
 570         .quad compat_sys_timer_gettime
 571         .quad sys_timer_getoverrun
 572         .quad sys_timer_delete
 573         .quad compat_sys_clock_settime
 574         .quad compat_sys_clock_gettime  /* 265 */
 575         .quad compat_sys_clock_getres
 576         .quad compat_sys_clock_nanosleep
 577         .quad compat_sys_statfs64
 578         .quad compat_sys_fstatfs64
 579         .quad sys_tgkill                /* 270 */
 580         .quad compat_sys_utimes
 581         .quad sys32_fadvise64_64
 582         .quad quiet_ni_syscall  /* sys_vserver */
 583         .quad sys_mbind
 584         .quad compat_sys_get_mempolicy  /* 275 */
 585         .quad sys_set_mempolicy
 586         .quad compat_sys_mq_open
 587         .quad sys_mq_unlink
 588         .quad compat_sys_mq_timedsend
 589         .quad compat_sys_mq_timedreceive        /* 280 */
 590         .quad compat_sys_mq_notify
 591         .quad compat_sys_mq_getsetattr
 592         .quad quiet_ni_syscall          /* reserved for kexec */
 593         .quad compat_sys_waitid
 594         .quad quiet_ni_syscall          /* sys_altroot */
 595         .quad sys_add_key
 596         .quad sys_request_key
 597         .quad sys_keyctl
 598         /* don't forget to change IA32_NR_syscalls */
 599 ia32_syscall_end:
 600         .rept IA32_NR_syscalls-(ia32_syscall_end-ia32_sys_call_table)/8
 601                 .quad ni_syscall
 602         .endr