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linux/arch/x86_64/ia32/ia32entry.S
Andi Kleen 0e92da4acb [PATCH] x86_64: Don't clobber r8-r11 in int 0x80 handler 
When int 0x80 is called from long mode r8-r11 would leak out of the
kernel (or rather they would be filled with some values from
the kernel stack). I don't think it's a security issue because
the values come from the fixed stack frame which should be near
always user registers from a previous interrupt.

Still better fix it.

Longer term the register save macros need to be cleaned up
to avoid such mistakes in the future.

Original analysis from Richard Brunner, fix by me.

Cc: Richard.Brunner@amd.com

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-28 19:28:00 -07:00

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/*
* Compatibility mode system call entry point for x86-64.
*
* Copyright 2000-2002 Andi Kleen, SuSE Labs.
*/
#include <asm/dwarf2.h>
#include <asm/calling.h>
#include <asm/asm-offsets.h>
#include <asm/current.h>
#include <asm/errno.h>
#include <asm/ia32_unistd.h>
#include <asm/thread_info.h>
#include <asm/segment.h>
#include <asm/vsyscall32.h>
#include <asm/irqflags.h>
#include <linux/linkage.h>
#define IA32_NR_syscalls ((ia32_syscall_end - ia32_sys_call_table)/8)
.macro IA32_ARG_FIXUP noebp=0
movl %edi,%r8d
.if \noebp
.else
movl %ebp,%r9d
.endif
xchg %ecx,%esi
movl %ebx,%edi
movl %edx,%edx /* zero extension */
.endm
/* clobbers %eax */
.macro CLEAR_RREGS
xorl %eax,%eax
movq %rax,R11(%rsp)
movq %rax,R10(%rsp)
movq %rax,R9(%rsp)
movq %rax,R8(%rsp)
.endm
.macro CFI_STARTPROC32 simple
CFI_STARTPROC \simple
CFI_UNDEFINED r8
CFI_UNDEFINED r9
CFI_UNDEFINED r10
CFI_UNDEFINED r11
CFI_UNDEFINED r12
CFI_UNDEFINED r13
CFI_UNDEFINED r14
CFI_UNDEFINED r15
.endm
/*
* 32bit SYSENTER instruction entry.
*
* Arguments:
* %eax System call number.
* %ebx Arg1
* %ecx Arg2
* %edx Arg3
* %esi Arg4
* %edi Arg5
* %ebp user stack
* 0(%ebp) Arg6
*
* Interrupts off.
*
* This is purely a fast path. For anything complicated we use the int 0x80
* path below. Set up a complete hardware stack frame to share code
* with the int 0x80 path.
*/
ENTRY(ia32_sysenter_target)
CFI_STARTPROC32 simple
CFI_DEF_CFA rsp,0
CFI_REGISTER rsp,rbp
swapgs
movq %gs:pda_kernelstack, %rsp
addq $(PDA_STACKOFFSET),%rsp
/*
* No need to follow this irqs on/off section: the syscall
* disabled irqs, here we enable it straight after entry:
*/
sti
movl %ebp,%ebp /* zero extension */
pushq $__USER32_DS
CFI_ADJUST_CFA_OFFSET 8
/*CFI_REL_OFFSET ss,0*/
pushq %rbp
CFI_ADJUST_CFA_OFFSET 8
CFI_REL_OFFSET rsp,0
pushfq
CFI_ADJUST_CFA_OFFSET 8
/*CFI_REL_OFFSET rflags,0*/
movl $VSYSCALL32_SYSEXIT, %r10d
CFI_REGISTER rip,r10
pushq $__USER32_CS
CFI_ADJUST_CFA_OFFSET 8
/*CFI_REL_OFFSET cs,0*/
movl %eax, %eax
pushq %r10
CFI_ADJUST_CFA_OFFSET 8
CFI_REL_OFFSET rip,0
pushq %rax
CFI_ADJUST_CFA_OFFSET 8
cld
SAVE_ARGS 0,0,0
/* no need to do an access_ok check here because rbp has been
32bit zero extended */
1: movl (%rbp),%r9d
.section __ex_table,"a"
.quad 1b,ia32_badarg
.previous
GET_THREAD_INFO(%r10)
orl $TS_COMPAT,threadinfo_status(%r10)
testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
CFI_REMEMBER_STATE
jnz sysenter_tracesys
sysenter_do_call:
cmpl $(IA32_NR_syscalls-1),%eax
ja ia32_badsys
IA32_ARG_FIXUP 1
call *ia32_sys_call_table(,%rax,8)
movq %rax,RAX-ARGOFFSET(%rsp)
GET_THREAD_INFO(%r10)
cli
TRACE_IRQS_OFF
testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
jnz int_ret_from_sys_call
andl $~TS_COMPAT,threadinfo_status(%r10)
/* clear IF, that popfq doesn't enable interrupts early */
andl $~0x200,EFLAGS-R11(%rsp)
RESTORE_ARGS 1,24,1,1,1,1
popfq
CFI_ADJUST_CFA_OFFSET -8
/*CFI_RESTORE rflags*/
popq %rcx /* User %esp */
CFI_ADJUST_CFA_OFFSET -8
CFI_REGISTER rsp,rcx
movl $VSYSCALL32_SYSEXIT,%edx /* User %eip */
CFI_REGISTER rip,rdx
TRACE_IRQS_ON
swapgs
sti /* sti only takes effect after the next instruction */
/* sysexit */
.byte 0xf, 0x35
sysenter_tracesys:
CFI_RESTORE_STATE
SAVE_REST
CLEAR_RREGS
movq $-ENOSYS,RAX(%rsp) /* really needed? */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
movl %ebp, %ebp
/* no need to do an access_ok check here because rbp has been
32bit zero extended */
1: movl (%rbp),%r9d
.section __ex_table,"a"
.quad 1b,ia32_badarg
.previous
jmp sysenter_do_call
CFI_ENDPROC
ENDPROC(ia32_sysenter_target)
/*
* 32bit SYSCALL instruction entry.
*
* Arguments:
* %eax System call number.
* %ebx Arg1
* %ecx return EIP
* %edx Arg3
* %esi Arg4
* %edi Arg5
* %ebp Arg2 [note: not saved in the stack frame, should not be touched]
* %esp user stack
* 0(%esp) Arg6
*
* Interrupts off.
*
* This is purely a fast path. For anything complicated we use the int 0x80
* path below. Set up a complete hardware stack frame to share code
* with the int 0x80 path.
*/
ENTRY(ia32_cstar_target)
CFI_STARTPROC32 simple
CFI_DEF_CFA rsp,PDA_STACKOFFSET
CFI_REGISTER rip,rcx
/*CFI_REGISTER rflags,r11*/
swapgs
movl %esp,%r8d
CFI_REGISTER rsp,r8
movq %gs:pda_kernelstack,%rsp
/*
* No need to follow this irqs on/off section: the syscall
* disabled irqs and here we enable it straight after entry:
*/
sti
SAVE_ARGS 8,1,1
movl %eax,%eax /* zero extension */
movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
movq %rcx,RIP-ARGOFFSET(%rsp)
CFI_REL_OFFSET rip,RIP-ARGOFFSET
movq %rbp,RCX-ARGOFFSET(%rsp) /* this lies slightly to ptrace */
movl %ebp,%ecx
movq $__USER32_CS,CS-ARGOFFSET(%rsp)
movq $__USER32_DS,SS-ARGOFFSET(%rsp)
movq %r11,EFLAGS-ARGOFFSET(%rsp)
/*CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
movq %r8,RSP-ARGOFFSET(%rsp)
CFI_REL_OFFSET rsp,RSP-ARGOFFSET
/* no need to do an access_ok check here because r8 has been
32bit zero extended */
/* hardware stack frame is complete now */
1: movl (%r8),%r9d
.section __ex_table,"a"
.quad 1b,ia32_badarg
.previous
GET_THREAD_INFO(%r10)
orl $TS_COMPAT,threadinfo_status(%r10)
testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
CFI_REMEMBER_STATE
jnz cstar_tracesys
cstar_do_call:
cmpl $IA32_NR_syscalls-1,%eax
ja ia32_badsys
IA32_ARG_FIXUP 1
call *ia32_sys_call_table(,%rax,8)
movq %rax,RAX-ARGOFFSET(%rsp)
GET_THREAD_INFO(%r10)
cli
TRACE_IRQS_OFF
testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
jnz int_ret_from_sys_call
andl $~TS_COMPAT,threadinfo_status(%r10)
RESTORE_ARGS 1,-ARG_SKIP,1,1,1
movl RIP-ARGOFFSET(%rsp),%ecx
CFI_REGISTER rip,rcx
movl EFLAGS-ARGOFFSET(%rsp),%r11d
/*CFI_REGISTER rflags,r11*/
TRACE_IRQS_ON
movl RSP-ARGOFFSET(%rsp),%esp
CFI_RESTORE rsp
swapgs
sysretl
cstar_tracesys:
CFI_RESTORE_STATE
SAVE_REST
CLEAR_RREGS
movq $-ENOSYS,RAX(%rsp) /* really needed? */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
movl RSP-ARGOFFSET(%rsp), %r8d
/* no need to do an access_ok check here because r8 has been
32bit zero extended */
1: movl (%r8),%r9d
.section __ex_table,"a"
.quad 1b,ia32_badarg
.previous
jmp cstar_do_call
END(ia32_cstar_target)
ia32_badarg:
movq $-EFAULT,%rax
jmp ia32_sysret
CFI_ENDPROC
/*
* Emulated IA32 system calls via int 0x80.
*
* Arguments:
* %eax System call number.
* %ebx Arg1
* %ecx Arg2
* %edx Arg3
* %esi Arg4
* %edi Arg5
* %ebp Arg6 [note: not saved in the stack frame, should not be touched]
*
* Notes:
* Uses the same stack frame as the x86-64 version.
* All registers except %eax must be saved (but ptrace may violate that)
* Arguments are zero extended. For system calls that want sign extension and
* take long arguments a wrapper is needed. Most calls can just be called
* directly.
* Assumes it is only called from user space and entered with interrupts off.
*/
ENTRY(ia32_syscall)
CFI_STARTPROC simple
CFI_DEF_CFA rsp,SS+8-RIP
/*CFI_REL_OFFSET ss,SS-RIP*/
CFI_REL_OFFSET rsp,RSP-RIP
/*CFI_REL_OFFSET rflags,EFLAGS-RIP*/
/*CFI_REL_OFFSET cs,CS-RIP*/
CFI_REL_OFFSET rip,RIP-RIP
swapgs
/*
* No need to follow this irqs on/off section: the syscall
* disabled irqs and here we enable it straight after entry:
*/
sti
movl %eax,%eax
pushq %rax
CFI_ADJUST_CFA_OFFSET 8
cld
/* note the registers are not zero extended to the sf.
this could be a problem. */
SAVE_ARGS 0,0,1
GET_THREAD_INFO(%r10)
orl $TS_COMPAT,threadinfo_status(%r10)
testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
jnz ia32_tracesys
ia32_do_syscall:
cmpl $(IA32_NR_syscalls-1),%eax
ja ia32_badsys
IA32_ARG_FIXUP
call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
ia32_sysret:
movq %rax,RAX-ARGOFFSET(%rsp)
jmp int_ret_from_sys_call
ia32_tracesys:
SAVE_REST
movq $-ENOSYS,RAX(%rsp) /* really needed? */
movq %rsp,%rdi /* &pt_regs -> arg1 */
call syscall_trace_enter
LOAD_ARGS ARGOFFSET /* reload args from stack in case ptrace changed it */
RESTORE_REST
jmp ia32_do_syscall
END(ia32_syscall)
ia32_badsys:
movq $0,ORIG_RAX-ARGOFFSET(%rsp)
movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
jmp int_ret_from_sys_call
quiet_ni_syscall:
movq $-ENOSYS,%rax
ret
CFI_ENDPROC
.macro PTREGSCALL label, func, arg
.globl \label
\label:
leaq \func(%rip),%rax
leaq -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
jmp ia32_ptregs_common
.endm
CFI_STARTPROC32
PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
PTREGSCALL stub32_sigsuspend, sys32_sigsuspend, %rcx
PTREGSCALL stub32_execve, sys32_execve, %rcx
PTREGSCALL stub32_fork, sys_fork, %rdi
PTREGSCALL stub32_clone, sys32_clone, %rdx
PTREGSCALL stub32_vfork, sys_vfork, %rdi
PTREGSCALL stub32_iopl, sys_iopl, %rsi
PTREGSCALL stub32_rt_sigsuspend, sys_rt_sigsuspend, %rdx
ENTRY(ia32_ptregs_common)
popq %r11
CFI_ENDPROC
CFI_STARTPROC32 simple
CFI_DEF_CFA rsp,SS+8-ARGOFFSET
CFI_REL_OFFSET rax,RAX-ARGOFFSET
CFI_REL_OFFSET rcx,RCX-ARGOFFSET
CFI_REL_OFFSET rdx,RDX-ARGOFFSET
CFI_REL_OFFSET rsi,RSI-ARGOFFSET
CFI_REL_OFFSET rdi,RDI-ARGOFFSET
CFI_REL_OFFSET rip,RIP-ARGOFFSET
/* CFI_REL_OFFSET cs,CS-ARGOFFSET*/
/* CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
CFI_REL_OFFSET rsp,RSP-ARGOFFSET
/* CFI_REL_OFFSET ss,SS-ARGOFFSET*/
SAVE_REST
call *%rax
RESTORE_REST
jmp ia32_sysret /* misbalances the return cache */
CFI_ENDPROC
END(ia32_ptregs_common)
.section .rodata,"a"
.align 8
ia32_sys_call_table:
.quad sys_restart_syscall
.quad sys_exit
.quad stub32_fork
.quad sys_read
.quad sys_write
.quad compat_sys_open /* 5 */
.quad sys_close
.quad sys32_waitpid
.quad sys_creat
.quad sys_link
.quad sys_unlink /* 10 */
.quad stub32_execve
.quad sys_chdir
.quad compat_sys_time
.quad sys_mknod
.quad sys_chmod /* 15 */
.quad sys_lchown16
.quad quiet_ni_syscall /* old break syscall holder */
.quad sys_stat
.quad sys32_lseek
.quad sys_getpid /* 20 */
.quad compat_sys_mount /* mount */
.quad sys_oldumount /* old_umount */
.quad sys_setuid16
.quad sys_getuid16
.quad compat_sys_stime /* stime */ /* 25 */
.quad sys32_ptrace /* ptrace */
.quad sys_alarm
.quad sys_fstat /* (old)fstat */
.quad sys_pause
.quad compat_sys_utime /* 30 */
.quad quiet_ni_syscall /* old stty syscall holder */
.quad quiet_ni_syscall /* old gtty syscall holder */
.quad sys_access
.quad sys_nice
.quad quiet_ni_syscall /* 35 */ /* old ftime syscall holder */
.quad sys_sync
.quad sys32_kill
.quad sys_rename
.quad sys_mkdir
.quad sys_rmdir /* 40 */
.quad sys_dup
.quad sys32_pipe
.quad compat_sys_times
.quad quiet_ni_syscall /* old prof syscall holder */
.quad sys_brk /* 45 */
.quad sys_setgid16
.quad sys_getgid16
.quad sys_signal
.quad sys_geteuid16
.quad sys_getegid16 /* 50 */
.quad sys_acct
.quad sys_umount /* new_umount */
.quad quiet_ni_syscall /* old lock syscall holder */
.quad compat_sys_ioctl
.quad compat_sys_fcntl64 /* 55 */
.quad quiet_ni_syscall /* old mpx syscall holder */
.quad sys_setpgid
.quad quiet_ni_syscall /* old ulimit syscall holder */
.quad sys32_olduname
.quad sys_umask /* 60 */
.quad sys_chroot
.quad sys32_ustat
.quad sys_dup2
.quad sys_getppid
.quad sys_getpgrp /* 65 */
.quad sys_setsid
.quad sys32_sigaction
.quad sys_sgetmask
.quad sys_ssetmask
.quad sys_setreuid16 /* 70 */
.quad sys_setregid16
.quad stub32_sigsuspend
.quad compat_sys_sigpending
.quad sys_sethostname
.quad compat_sys_setrlimit /* 75 */
.quad compat_sys_old_getrlimit /* old_getrlimit */
.quad compat_sys_getrusage
.quad sys32_gettimeofday
.quad sys32_settimeofday
.quad sys_getgroups16 /* 80 */
.quad sys_setgroups16
.quad sys32_old_select
.quad sys_symlink
.quad sys_lstat
.quad sys_readlink /* 85 */
#ifdef CONFIG_IA32_AOUT
.quad sys_uselib
#else
.quad quiet_ni_syscall
#endif
.quad sys_swapon
.quad sys_reboot
.quad compat_sys_old_readdir
.quad sys32_mmap /* 90 */
.quad sys_munmap
.quad sys_truncate
.quad sys_ftruncate
.quad sys_fchmod
.quad sys_fchown16 /* 95 */
.quad sys_getpriority
.quad sys_setpriority
.quad quiet_ni_syscall /* old profil syscall holder */
.quad compat_sys_statfs
.quad compat_sys_fstatfs /* 100 */
.quad sys_ioperm
.quad compat_sys_socketcall
.quad sys_syslog
.quad compat_sys_setitimer
.quad compat_sys_getitimer /* 105 */
.quad compat_sys_newstat
.quad compat_sys_newlstat
.quad compat_sys_newfstat
.quad sys32_uname
.quad stub32_iopl /* 110 */
.quad sys_vhangup
.quad quiet_ni_syscall /* old "idle" system call */
.quad sys32_vm86_warning /* vm86old */
.quad compat_sys_wait4
.quad sys_swapoff /* 115 */
.quad sys32_sysinfo
.quad sys32_ipc
.quad sys_fsync
.quad stub32_sigreturn
.quad stub32_clone /* 120 */
.quad sys_setdomainname
.quad sys_uname
.quad sys_modify_ldt
.quad compat_sys_adjtimex
.quad sys32_mprotect /* 125 */
.quad compat_sys_sigprocmask
.quad quiet_ni_syscall /* create_module */
.quad sys_init_module
.quad sys_delete_module
.quad quiet_ni_syscall /* 130 get_kernel_syms */
.quad sys_quotactl
.quad sys_getpgid
.quad sys_fchdir
.quad quiet_ni_syscall /* bdflush */
.quad sys_sysfs /* 135 */
.quad sys_personality
.quad quiet_ni_syscall /* for afs_syscall */
.quad sys_setfsuid16
.quad sys_setfsgid16
.quad sys_llseek /* 140 */
.quad compat_sys_getdents
.quad compat_sys_select
.quad sys_flock
.quad sys_msync
.quad compat_sys_readv /* 145 */
.quad compat_sys_writev
.quad sys_getsid
.quad sys_fdatasync
.quad sys32_sysctl /* sysctl */
.quad sys_mlock /* 150 */
.quad sys_munlock
.quad sys_mlockall
.quad sys_munlockall
.quad sys_sched_setparam
.quad sys_sched_getparam /* 155 */
.quad sys_sched_setscheduler
.quad sys_sched_getscheduler
.quad sys_sched_yield
.quad sys_sched_get_priority_max
.quad sys_sched_get_priority_min /* 160 */
.quad sys_sched_rr_get_interval
.quad compat_sys_nanosleep
.quad sys_mremap
.quad sys_setresuid16
.quad sys_getresuid16 /* 165 */
.quad sys32_vm86_warning /* vm86 */
.quad quiet_ni_syscall /* query_module */
.quad sys_poll
.quad compat_sys_nfsservctl
.quad sys_setresgid16 /* 170 */
.quad sys_getresgid16
.quad sys_prctl
.quad stub32_rt_sigreturn
.quad sys32_rt_sigaction
.quad sys32_rt_sigprocmask /* 175 */
.quad sys32_rt_sigpending
.quad compat_sys_rt_sigtimedwait
.quad sys32_rt_sigqueueinfo
.quad stub32_rt_sigsuspend
.quad sys32_pread /* 180 */
.quad sys32_pwrite
.quad sys_chown16
.quad sys_getcwd
.quad sys_capget
.quad sys_capset
.quad stub32_sigaltstack
.quad sys32_sendfile
.quad quiet_ni_syscall /* streams1 */
.quad quiet_ni_syscall /* streams2 */
.quad stub32_vfork /* 190 */
.quad compat_sys_getrlimit
.quad sys32_mmap2
.quad sys32_truncate64
.quad sys32_ftruncate64
.quad sys32_stat64 /* 195 */
.quad sys32_lstat64
.quad sys32_fstat64
.quad sys_lchown
.quad sys_getuid
.quad sys_getgid /* 200 */
.quad sys_geteuid
.quad sys_getegid
.quad sys_setreuid
.quad sys_setregid
.quad sys_getgroups /* 205 */
.quad sys_setgroups
.quad sys_fchown
.quad sys_setresuid
.quad sys_getresuid
.quad sys_setresgid /* 210 */
.quad sys_getresgid
.quad sys_chown
.quad sys_setuid
.quad sys_setgid
.quad sys_setfsuid /* 215 */
.quad sys_setfsgid
.quad sys_pivot_root
.quad sys_mincore
.quad sys_madvise
.quad compat_sys_getdents64 /* 220 getdents64 */
.quad compat_sys_fcntl64
.quad quiet_ni_syscall /* tux */
.quad quiet_ni_syscall /* security */
.quad sys_gettid
.quad sys_readahead /* 225 */
.quad sys_setxattr
.quad sys_lsetxattr
.quad sys_fsetxattr
.quad sys_getxattr
.quad sys_lgetxattr /* 230 */
.quad sys_fgetxattr
.quad sys_listxattr
.quad sys_llistxattr
.quad sys_flistxattr
.quad sys_removexattr /* 235 */
.quad sys_lremovexattr
.quad sys_fremovexattr
.quad sys_tkill
.quad sys_sendfile64
.quad compat_sys_futex /* 240 */
.quad compat_sys_sched_setaffinity
.quad compat_sys_sched_getaffinity
.quad sys32_set_thread_area
.quad sys32_get_thread_area
.quad compat_sys_io_setup /* 245 */
.quad sys_io_destroy
.quad compat_sys_io_getevents
.quad compat_sys_io_submit
.quad sys_io_cancel
.quad sys_fadvise64 /* 250 */
.quad quiet_ni_syscall /* free_huge_pages */
.quad sys_exit_group
.quad sys32_lookup_dcookie
.quad sys_epoll_create
.quad sys_epoll_ctl /* 255 */
.quad sys_epoll_wait
.quad sys_remap_file_pages
.quad sys_set_tid_address
.quad compat_sys_timer_create
.quad compat_sys_timer_settime /* 260 */
.quad compat_sys_timer_gettime
.quad sys_timer_getoverrun
.quad sys_timer_delete
.quad compat_sys_clock_settime
.quad compat_sys_clock_gettime /* 265 */
.quad compat_sys_clock_getres
.quad compat_sys_clock_nanosleep
.quad compat_sys_statfs64
.quad compat_sys_fstatfs64
.quad sys_tgkill /* 270 */
.quad compat_sys_utimes
.quad sys32_fadvise64_64
.quad quiet_ni_syscall /* sys_vserver */
.quad sys_mbind
.quad compat_sys_get_mempolicy /* 275 */
.quad sys_set_mempolicy
.quad compat_sys_mq_open
.quad sys_mq_unlink
.quad compat_sys_mq_timedsend
.quad compat_sys_mq_timedreceive /* 280 */
.quad compat_sys_mq_notify
.quad compat_sys_mq_getsetattr
.quad compat_sys_kexec_load /* reserved for kexec */
.quad compat_sys_waitid
.quad quiet_ni_syscall /* 285: sys_altroot */
.quad sys_add_key
.quad sys_request_key
.quad sys_keyctl
.quad sys_ioprio_set
.quad sys_ioprio_get /* 290 */
.quad sys_inotify_init
.quad sys_inotify_add_watch
.quad sys_inotify_rm_watch
.quad sys_migrate_pages
.quad compat_sys_openat /* 295 */
.quad sys_mkdirat
.quad sys_mknodat
.quad sys_fchownat
.quad compat_sys_futimesat
.quad sys32_fstatat /* 300 */
.quad sys_unlinkat
.quad sys_renameat
.quad sys_linkat
.quad sys_symlinkat
.quad sys_readlinkat /* 305 */
.quad sys_fchmodat
.quad sys_faccessat
.quad quiet_ni_syscall /* pselect6 for now */
.quad quiet_ni_syscall /* ppoll for now */
.quad sys_unshare /* 310 */
.quad compat_sys_set_robust_list
.quad compat_sys_get_robust_list
.quad sys_splice
.quad sys_sync_file_range
.quad sys_tee
.quad compat_sys_vmsplice
.quad compat_sys_move_pages
ia32_syscall_end:
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