[PATCH 5/8] syscalls/x86: use struct pt_regs based syscall calling for IA32_EMULATION and x32

From: Dominik Brodowski
Date: Thu Apr 05 2018 - 05:55:23 EST

Extend ARCH_HAS_SYSCALL_WRAPPER for i386 emulation and for x32 on 64-bit
x86.

For x32, all we need to do is to create an additional stub for each
compat syscall which decodes the parameters in x86-64 ordering, e.g.:

asmlinkage long __compat_sys_x32_xyzzy(struct pt_regs *regs)
{
return c_SyS_xyzzy(regs->di, regs->si, regs->dx);
}

For i386 emulation, we need to teach compat_sys_*() to take struct
pt_regs as its only argument, e.g.:

asmlinkage long __compat_sys_ia32_xyzzy(struct pt_regs *regs)
{
return c_SyS_xyzzy(regs->bx, regs->cx, regs->dx);
}

In addition, we need to create additional stubs for common syscalls
(that is, for syscalls which have the same parameters on 32-bit and
64-bit), e.g.:

asmlinkage long __sys_ia32_xyzzy(struct pt_regs *regs)
{
return c_sys_xyzzy(regs->bx, regs->cx, regs->dx);
}

This approach avoids leaking random user-provided register content down
the call chain.

This patch is based on an original proof-of-concept

From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

and was split up and heavily modified by me, in particular to base it on
ARCH_HAS_SYSCALL_WRAPPER.

Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/Kconfig | 2 +-
arch/x86/entry/common.c | 4 +
arch/x86/entry/syscall_32.c | 15 +-
arch/x86/entry/syscalls/syscall_32.tbl | 677 +++++++++++++++++----------------
arch/x86/entry/syscalls/syscall_64.tbl | 74 ++--
arch/x86/include/asm/syscall_wrapper.h | 117 +++++-
6 files changed, 509 insertions(+), 380 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 67348efc2540..7bbd6a174722 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2957,5 +2957,5 @@ source "lib/Kconfig"

config SYSCALL_PTREGS
def_bool y
- depends on X86_64 && !COMPAT
+ depends on X86_64
select ARCH_HAS_SYSCALL_WRAPPER
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index e1b91bffa988..425f798b39e3 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -325,6 +325,9 @@ static __always_inline void do_syscall_32_irqs_on(struct pt_regs *regs)

if (likely(nr < IA32_NR_syscalls)) {
nr = array_index_nospec(nr, IA32_NR_syscalls);
+#ifdef CONFIG_SYSCALL_PTREGS
+ regs->ax = ia32_sys_call_table[nr](regs);
+#else
/*
* It's possible that a 32-bit syscall implementation
* takes a 64-bit parameter but nonetheless assumes that
@@ -335,6 +338,7 @@ static __always_inline void do_syscall_32_irqs_on(struct pt_regs *regs)
(unsigned int)regs->bx, (unsigned int)regs->cx,
(unsigned int)regs->dx, (unsigned int)regs->si,
(unsigned int)regs->di, (unsigned int)regs->bp);
+#endif /* CONFIG_SYSCALL_PTREGS */
}

syscall_return_slowpath(regs);
diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c
index 95c294963612..47060dd8efb1 100644
--- a/arch/x86/entry/syscall_32.c
+++ b/arch/x86/entry/syscall_32.c
@@ -7,14 +7,23 @@
#include <asm/asm-offsets.h>
#include <asm/syscall.h>

-#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ;
+#ifdef CONFIG_SYSCALL_PTREGS
+/* On X86_64, we use struct pt_regs * to pass parameters to syscalls */
+#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *);
+
+/* this is a lie, but it does not hurt as sys_ni_syscall just returns -EINVAL */
+extern asmlinkage long sys_ni_syscall(const struct pt_regs *);
+
+#else /* CONFIG_SYSCALL_PTREGS */
+#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
+extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
+#endif /* CONFIG_SYSCALL_PTREGS */
+
#include <asm/syscalls_32.h>
#undef __SYSCALL_I386

#define __SYSCALL_I386(nr, sym, qual) [nr] = sym,

-extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long);
-
__visible const sys_call_ptr_t ia32_sys_call_table[__NR_syscall_compat_max+1] = {
/*
* Smells like a compiler bug -- it doesn't work
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index c58f75b088c5..7f09a3da0b3d 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -4,390 +4,395 @@
# The format is:
# <number> <abi> <name> <entry point> <compat entry point>
#
+# The __sys_ia32 and __compat_sys_ia32 stubs are created on-the-fly for
+# sys_*() system calls and compat_sys_*() compat system calls if
+# IA32_EMULATION is defined, and expect struct pt_regs *regs as their only
+# parameter.
+#
# The abi is always "i386" for this file.
#
0 i386 restart_syscall sys_restart_syscall
-1 i386 exit sys_exit
+1 i386 exit sys_exit __sys_ia32_exit
2 i386 fork sys_fork
-3 i386 read sys_read
-4 i386 write sys_write
-5 i386 open sys_open compat_sys_open
-6 i386 close sys_close
-7 i386 waitpid sys_waitpid
-8 i386 creat sys_creat
-9 i386 link sys_link
-10 i386 unlink sys_unlink
-11 i386 execve sys_execve compat_sys_execve
-12 i386 chdir sys_chdir
-13 i386 time sys_time compat_sys_time
-14 i386 mknod sys_mknod
-15 i386 chmod sys_chmod
-16 i386 lchown sys_lchown16
+3 i386 read sys_read __sys_ia32_read
+4 i386 write sys_write __sys_ia32_write
+5 i386 open sys_open __compat_sys_ia32_open
+6 i386 close sys_close __sys_ia32_close
+7 i386 waitpid sys_waitpid __sys_ia32_waitpid
+8 i386 creat sys_creat __sys_ia32_creat
+9 i386 link sys_link __sys_ia32_link
+10 i386 unlink sys_unlink __sys_ia32_unlink
+11 i386 execve sys_execve __compat_sys_ia32_execve
+12 i386 chdir sys_chdir __sys_ia32_chdir
+13 i386 time sys_time __compat_sys_ia32_time
+14 i386 mknod sys_mknod __sys_ia32_mknod
+15 i386 chmod sys_chmod __sys_ia32_chmod
+16 i386 lchown sys_lchown16 __sys_ia32_lchown16
17 i386 break
-18 i386 oldstat sys_stat
-19 i386 lseek sys_lseek compat_sys_lseek
+18 i386 oldstat sys_stat __sys_ia32_stat
+19 i386 lseek sys_lseek __compat_sys_ia32_lseek
20 i386 getpid sys_getpid
-21 i386 mount sys_mount compat_sys_mount
-22 i386 umount sys_oldumount
-23 i386 setuid sys_setuid16
+21 i386 mount sys_mount __compat_sys_ia32_mount
+22 i386 umount sys_oldumount __sys_ia32_oldumount
+23 i386 setuid sys_setuid16 __sys_ia32_setuid16
24 i386 getuid sys_getuid16
-25 i386 stime sys_stime compat_sys_stime
-26 i386 ptrace sys_ptrace compat_sys_ptrace
-27 i386 alarm sys_alarm
-28 i386 oldfstat sys_fstat
+25 i386 stime sys_stime __compat_sys_ia32_stime
+26 i386 ptrace sys_ptrace __compat_sys_ia32_ptrace
+27 i386 alarm sys_alarm __sys_ia32_alarm
+28 i386 oldfstat sys_fstat __sys_ia32_fstat
29 i386 pause sys_pause
-30 i386 utime sys_utime compat_sys_utime
+30 i386 utime sys_utime __compat_sys_ia32_utime
31 i386 stty
32 i386 gtty
-33 i386 access sys_access
-34 i386 nice sys_nice
+33 i386 access sys_access __sys_ia32_access
+34 i386 nice sys_nice __sys_ia32_nice
35 i386 ftime
36 i386 sync sys_sync
-37 i386 kill sys_kill
-38 i386 rename sys_rename
-39 i386 mkdir sys_mkdir
-40 i386 rmdir sys_rmdir
-41 i386 dup sys_dup
-42 i386 pipe sys_pipe
-43 i386 times sys_times compat_sys_times
+37 i386 kill sys_kill __sys_ia32_kill
+38 i386 rename sys_rename __sys_ia32_rename
+39 i386 mkdir sys_mkdir __sys_ia32_mkdir
+40 i386 rmdir sys_rmdir __sys_ia32_rmdir
+41 i386 dup sys_dup __sys_ia32_dup
+42 i386 pipe sys_pipe __sys_ia32_pipe
+43 i386 times sys_times __compat_sys_ia32_times
44 i386 prof
-45 i386 brk sys_brk
-46 i386 setgid sys_setgid16
+45 i386 brk sys_brk __sys_ia32_brk
+46 i386 setgid sys_setgid16 __sys_ia32_setgid16
47 i386 getgid sys_getgid16
-48 i386 signal sys_signal
+48 i386 signal sys_signal __sys_ia32_signal
49 i386 geteuid sys_geteuid16
50 i386 getegid sys_getegid16
-51 i386 acct sys_acct
-52 i386 umount2 sys_umount
+51 i386 acct sys_acct __sys_ia32_acct
+52 i386 umount2 sys_umount __sys_ia32_umount
53 i386 lock
-54 i386 ioctl sys_ioctl compat_sys_ioctl
-55 i386 fcntl sys_fcntl compat_sys_fcntl64
+54 i386 ioctl sys_ioctl __compat_sys_ia32_ioctl
+55 i386 fcntl sys_fcntl __compat_sys_ia32_fcntl64
56 i386 mpx
-57 i386 setpgid sys_setpgid
+57 i386 setpgid sys_setpgid __sys_ia32_setpgid
58 i386 ulimit
-59 i386 oldolduname sys_olduname
-60 i386 umask sys_umask
-61 i386 chroot sys_chroot
-62 i386 ustat sys_ustat compat_sys_ustat
-63 i386 dup2 sys_dup2
+59 i386 oldolduname sys_olduname __sys_ia32_olduname
+60 i386 umask sys_umask __sys_ia32_umask
+61 i386 chroot sys_chroot __sys_ia32_chroot
+62 i386 ustat sys_ustat __compat_sys_ia32_ustat
+63 i386 dup2 sys_dup2 __sys_ia32_dup2
64 i386 getppid sys_getppid
65 i386 getpgrp sys_getpgrp
66 i386 setsid sys_setsid
-67 i386 sigaction sys_sigaction compat_sys_sigaction
+67 i386 sigaction sys_sigaction __compat_sys_ia32_sigaction
68 i386 sgetmask sys_sgetmask
-69 i386 ssetmask sys_ssetmask
-70 i386 setreuid sys_setreuid16
-71 i386 setregid sys_setregid16
-72 i386 sigsuspend sys_sigsuspend
-73 i386 sigpending sys_sigpending compat_sys_sigpending
-74 i386 sethostname sys_sethostname
-75 i386 setrlimit sys_setrlimit compat_sys_setrlimit
-76 i386 getrlimit sys_old_getrlimit compat_sys_old_getrlimit
-77 i386 getrusage sys_getrusage compat_sys_getrusage
-78 i386 gettimeofday sys_gettimeofday compat_sys_gettimeofday
-79 i386 settimeofday sys_settimeofday compat_sys_settimeofday
-80 i386 getgroups sys_getgroups16
-81 i386 setgroups sys_setgroups16
-82 i386 select sys_old_select compat_sys_old_select
-83 i386 symlink sys_symlink
-84 i386 oldlstat sys_lstat
-85 i386 readlink sys_readlink
-86 i386 uselib sys_uselib
-87 i386 swapon sys_swapon
-88 i386 reboot sys_reboot
-89 i386 readdir sys_old_readdir compat_sys_old_readdir
-90 i386 mmap sys_old_mmap compat_sys_x86_mmap
-91 i386 munmap sys_munmap
-92 i386 truncate sys_truncate compat_sys_truncate
-93 i386 ftruncate sys_ftruncate compat_sys_ftruncate
-94 i386 fchmod sys_fchmod
-95 i386 fchown sys_fchown16
-96 i386 getpriority sys_getpriority
-97 i386 setpriority sys_setpriority
+69 i386 ssetmask sys_ssetmask __sys_ia32_ssetmask
+70 i386 setreuid sys_setreuid16 __sys_ia32_setreuid16
+71 i386 setregid sys_setregid16 __sys_ia32_setregid16
+72 i386 sigsuspend sys_sigsuspend __sys_ia32_sigsuspend
+73 i386 sigpending sys_sigpending __compat_sys_ia32_sigpending
+74 i386 sethostname sys_sethostname __sys_ia32_sethostname
+75 i386 setrlimit sys_setrlimit __compat_sys_ia32_setrlimit
+76 i386 getrlimit sys_old_getrlimit __compat_sys_ia32_old_getrlimit
+77 i386 getrusage sys_getrusage __compat_sys_ia32_getrusage
+78 i386 gettimeofday sys_gettimeofday __compat_sys_ia32_gettimeofday
+79 i386 settimeofday sys_settimeofday __compat_sys_ia32_settimeofday
+80 i386 getgroups sys_getgroups16 __sys_ia32_getgroups16
+81 i386 setgroups sys_setgroups16 __sys_ia32_setgroups16
+82 i386 select sys_old_select __compat_sys_ia32_old_select
+83 i386 symlink sys_symlink __sys_ia32_symlink
+84 i386 oldlstat sys_lstat __sys_ia32_lstat
+85 i386 readlink sys_readlink __sys_ia32_readlink
+86 i386 uselib sys_uselib __sys_ia32_uselib
+87 i386 swapon sys_swapon __sys_ia32_swapon
+88 i386 reboot sys_reboot __sys_ia32_reboot
+89 i386 readdir sys_old_readdir __compat_sys_ia32_old_readdir
+90 i386 mmap sys_old_mmap __compat_sys_ia32_x86_mmap
+91 i386 munmap sys_munmap __sys_ia32_munmap
+92 i386 truncate sys_truncate __compat_sys_ia32_truncate
+93 i386 ftruncate sys_ftruncate __compat_sys_ia32_ftruncate
+94 i386 fchmod sys_fchmod __sys_ia32_fchmod
+95 i386 fchown sys_fchown16 __sys_ia32_fchown16
+96 i386 getpriority sys_getpriority __sys_ia32_getpriority
+97 i386 setpriority sys_setpriority __sys_ia32_setpriority
98 i386 profil
-99 i386 statfs sys_statfs compat_sys_statfs
-100 i386 fstatfs sys_fstatfs compat_sys_fstatfs
-101 i386 ioperm sys_ioperm
-102 i386 socketcall sys_socketcall compat_sys_socketcall
-103 i386 syslog sys_syslog
-104 i386 setitimer sys_setitimer compat_sys_setitimer
-105 i386 getitimer sys_getitimer compat_sys_getitimer
-106 i386 stat sys_newstat compat_sys_newstat
-107 i386 lstat sys_newlstat compat_sys_newlstat
-108 i386 fstat sys_newfstat compat_sys_newfstat
-109 i386 olduname sys_uname
-110 i386 iopl sys_iopl
+99 i386 statfs sys_statfs __compat_sys_ia32_statfs
+100 i386 fstatfs sys_fstatfs __compat_sys_ia32_fstatfs
+101 i386 ioperm sys_ioperm __sys_ia32_ioperm
+102 i386 socketcall sys_socketcall __compat_sys_ia32_socketcall
+103 i386 syslog sys_syslog __sys_ia32_syslog
+104 i386 setitimer sys_setitimer __compat_sys_ia32_setitimer
+105 i386 getitimer sys_getitimer __compat_sys_ia32_getitimer
+106 i386 stat sys_newstat __compat_sys_ia32_newstat
+107 i386 lstat sys_newlstat __compat_sys_ia32_newlstat
+108 i386 fstat sys_newfstat __compat_sys_ia32_newfstat
+109 i386 olduname sys_uname __sys_ia32_uname
+110 i386 iopl sys_iopl __sys_ia32_iopl
111 i386 vhangup sys_vhangup
112 i386 idle
113 i386 vm86old sys_vm86old sys_ni_syscall
-114 i386 wait4 sys_wait4 compat_sys_wait4
-115 i386 swapoff sys_swapoff
-116 i386 sysinfo sys_sysinfo compat_sys_sysinfo
-117 i386 ipc sys_ipc compat_sys_ipc
-118 i386 fsync sys_fsync
+114 i386 wait4 sys_wait4 __compat_sys_ia32_wait4
+115 i386 swapoff sys_swapoff __sys_ia32_swapoff
+116 i386 sysinfo sys_sysinfo __compat_sys_ia32_sysinfo
+117 i386 ipc sys_ipc __compat_sys_ia32_ipc
+118 i386 fsync sys_fsync __sys_ia32_fsync
119 i386 sigreturn sys_sigreturn sys32_sigreturn
-120 i386 clone sys_clone compat_sys_x86_clone
-121 i386 setdomainname sys_setdomainname
-122 i386 uname sys_newuname
-123 i386 modify_ldt sys_modify_ldt
-124 i386 adjtimex sys_adjtimex compat_sys_adjtimex
-125 i386 mprotect sys_mprotect
-126 i386 sigprocmask sys_sigprocmask compat_sys_sigprocmask
+120 i386 clone sys_clone __compat_sys_ia32_x86_clone
+121 i386 setdomainname sys_setdomainname __sys_ia32_setdomainname
+122 i386 uname sys_newuname __sys_ia32_newuname
+123 i386 modify_ldt sys_modify_ldt __sys_ia32_modify_ldt
+124 i386 adjtimex sys_adjtimex __compat_sys_ia32_adjtimex
+125 i386 mprotect sys_mprotect __sys_ia32_mprotect
+126 i386 sigprocmask sys_sigprocmask __compat_sys_ia32_sigprocmask
127 i386 create_module
-128 i386 init_module sys_init_module
-129 i386 delete_module sys_delete_module
+128 i386 init_module sys_init_module __sys_ia32_init_module
+129 i386 delete_module sys_delete_module __sys_ia32_delete_module
130 i386 get_kernel_syms
-131 i386 quotactl sys_quotactl compat_sys_quotactl32
-132 i386 getpgid sys_getpgid
-133 i386 fchdir sys_fchdir
-134 i386 bdflush sys_bdflush
-135 i386 sysfs sys_sysfs
-136 i386 personality sys_personality
+131 i386 quotactl sys_quotactl __compat_sys_ia32_quotactl32
+132 i386 getpgid sys_getpgid __sys_ia32_getpgid
+133 i386 fchdir sys_fchdir __sys_ia32_fchdir
+134 i386 bdflush sys_bdflush __sys_ia32_bdflush
+135 i386 sysfs sys_sysfs __sys_ia32_sysfs
+136 i386 personality sys_personality __sys_ia32_personality
137 i386 afs_syscall
-138 i386 setfsuid sys_setfsuid16
-139 i386 setfsgid sys_setfsgid16
-140 i386 _llseek sys_llseek
-141 i386 getdents sys_getdents compat_sys_getdents
-142 i386 _newselect sys_select compat_sys_select
-143 i386 flock sys_flock
-144 i386 msync sys_msync
-145 i386 readv sys_readv compat_sys_readv
-146 i386 writev sys_writev compat_sys_writev
-147 i386 getsid sys_getsid
-148 i386 fdatasync sys_fdatasync
-149 i386 _sysctl sys_sysctl compat_sys_sysctl
-150 i386 mlock sys_mlock
-151 i386 munlock sys_munlock
-152 i386 mlockall sys_mlockall
+138 i386 setfsuid sys_setfsuid16 __sys_ia32_setfsuid16
+139 i386 setfsgid sys_setfsgid16 __sys_ia32_setfsgid16
+140 i386 _llseek sys_llseek __sys_ia32_llseek
+141 i386 getdents sys_getdents __compat_sys_ia32_getdents
+142 i386 _newselect sys_select __compat_sys_ia32_select
+143 i386 flock sys_flock __sys_ia32_flock
+144 i386 msync sys_msync __sys_ia32_msync
+145 i386 readv sys_readv __compat_sys_ia32_readv
+146 i386 writev sys_writev __compat_sys_ia32_writev
+147 i386 getsid sys_getsid __sys_ia32_getsid
+148 i386 fdatasync sys_fdatasync __sys_ia32_fdatasync
+149 i386 _sysctl sys_sysctl __compat_sys_ia32_sysctl
+150 i386 mlock sys_mlock __sys_ia32_mlock
+151 i386 munlock sys_munlock __sys_ia32_munlock
+152 i386 mlockall sys_mlockall __sys_ia32_mlockall
153 i386 munlockall sys_munlockall
-154 i386 sched_setparam sys_sched_setparam
-155 i386 sched_getparam sys_sched_getparam
-156 i386 sched_setscheduler sys_sched_setscheduler
-157 i386 sched_getscheduler sys_sched_getscheduler
+154 i386 sched_setparam sys_sched_setparam __sys_ia32_sched_setparam
+155 i386 sched_getparam sys_sched_getparam __sys_ia32_sched_getparam
+156 i386 sched_setscheduler sys_sched_setscheduler __sys_ia32_sched_setscheduler
+157 i386 sched_getscheduler sys_sched_getscheduler __sys_ia32_sched_getscheduler
158 i386 sched_yield sys_sched_yield
-159 i386 sched_get_priority_max sys_sched_get_priority_max
-160 i386 sched_get_priority_min sys_sched_get_priority_min
-161 i386 sched_rr_get_interval sys_sched_rr_get_interval compat_sys_sched_rr_get_interval
-162 i386 nanosleep sys_nanosleep compat_sys_nanosleep
-163 i386 mremap sys_mremap
-164 i386 setresuid sys_setresuid16
-165 i386 getresuid sys_getresuid16
+159 i386 sched_get_priority_max sys_sched_get_priority_max __sys_ia32_sched_get_priority_max
+160 i386 sched_get_priority_min sys_sched_get_priority_min __sys_ia32_sched_get_priority_min
+161 i386 sched_rr_get_interval sys_sched_rr_get_interval __compat_sys_ia32_sched_rr_get_interval
+162 i386 nanosleep sys_nanosleep __compat_sys_ia32_nanosleep
+163 i386 mremap sys_mremap __sys_ia32_mremap
+164 i386 setresuid sys_setresuid16 __sys_ia32_setresuid16
+165 i386 getresuid sys_getresuid16 __sys_ia32_getresuid16
166 i386 vm86 sys_vm86 sys_ni_syscall
167 i386 query_module
-168 i386 poll sys_poll
+168 i386 poll sys_poll __sys_ia32_poll
169 i386 nfsservctl
-170 i386 setresgid sys_setresgid16
-171 i386 getresgid sys_getresgid16
-172 i386 prctl sys_prctl
+170 i386 setresgid sys_setresgid16 __sys_ia32_setresgid16
+171 i386 getresgid sys_getresgid16 __sys_ia32_getresgid16
+172 i386 prctl sys_prctl __sys_ia32_prctl
173 i386 rt_sigreturn sys_rt_sigreturn sys32_rt_sigreturn
-174 i386 rt_sigaction sys_rt_sigaction compat_sys_rt_sigaction
-175 i386 rt_sigprocmask sys_rt_sigprocmask
-176 i386 rt_sigpending sys_rt_sigpending compat_sys_rt_sigpending
-177 i386 rt_sigtimedwait sys_rt_sigtimedwait compat_sys_rt_sigtimedwait
-178 i386 rt_sigqueueinfo sys_rt_sigqueueinfo compat_sys_rt_sigqueueinfo
-179 i386 rt_sigsuspend sys_rt_sigsuspend
-180 i386 pread64 sys_pread64 compat_sys_x86_pread
-181 i386 pwrite64 sys_pwrite64 compat_sys_x86_pwrite
-182 i386 chown sys_chown16
-183 i386 getcwd sys_getcwd
-184 i386 capget sys_capget
-185 i386 capset sys_capset
-186 i386 sigaltstack sys_sigaltstack compat_sys_sigaltstack
-187 i386 sendfile sys_sendfile compat_sys_sendfile
+174 i386 rt_sigaction sys_rt_sigaction __compat_sys_ia32_rt_sigaction
+175 i386 rt_sigprocmask sys_rt_sigprocmask __sys_ia32_rt_sigprocmask
+176 i386 rt_sigpending sys_rt_sigpending __compat_sys_ia32_rt_sigpending
+177 i386 rt_sigtimedwait sys_rt_sigtimedwait __compat_sys_ia32_rt_sigtimedwait
+178 i386 rt_sigqueueinfo sys_rt_sigqueueinfo __compat_sys_ia32_rt_sigqueueinfo
+179 i386 rt_sigsuspend sys_rt_sigsuspend __sys_ia32_rt_sigsuspend
+180 i386 pread64 sys_pread64 __compat_sys_ia32_x86_pread
+181 i386 pwrite64 sys_pwrite64 __compat_sys_ia32_x86_pwrite
+182 i386 chown sys_chown16 __sys_ia32_chown16
+183 i386 getcwd sys_getcwd __sys_ia32_getcwd
+184 i386 capget sys_capget __sys_ia32_capget
+185 i386 capset sys_capset __sys_ia32_capset
+186 i386 sigaltstack sys_sigaltstack __compat_sys_ia32_sigaltstack
+187 i386 sendfile sys_sendfile __compat_sys_ia32_sendfile
188 i386 getpmsg
189 i386 putpmsg
190 i386 vfork sys_vfork
-191 i386 ugetrlimit sys_getrlimit compat_sys_getrlimit
-192 i386 mmap2 sys_mmap_pgoff
-193 i386 truncate64 sys_truncate64 compat_sys_x86_truncate64
-194 i386 ftruncate64 sys_ftruncate64 compat_sys_x86_ftruncate64
-195 i386 stat64 sys_stat64 compat_sys_x86_stat64
-196 i386 lstat64 sys_lstat64 compat_sys_x86_lstat64
-197 i386 fstat64 sys_fstat64 compat_sys_x86_fstat64
-198 i386 lchown32 sys_lchown
+191 i386 ugetrlimit sys_getrlimit __compat_sys_ia32_getrlimit
+192 i386 mmap2 sys_mmap_pgoff __sys_ia32_mmap_pgoff
+193 i386 truncate64 sys_truncate64 __compat_sys_ia32_x86_truncate64
+194 i386 ftruncate64 sys_ftruncate64 __compat_sys_ia32_x86_ftruncate64
+195 i386 stat64 sys_stat64 __compat_sys_ia32_x86_stat64
+196 i386 lstat64 sys_lstat64 __compat_sys_ia32_x86_lstat64
+197 i386 fstat64 sys_fstat64 __compat_sys_ia32_x86_fstat64
+198 i386 lchown32 sys_lchown __sys_ia32_lchown
199 i386 getuid32 sys_getuid
200 i386 getgid32 sys_getgid
201 i386 geteuid32 sys_geteuid
202 i386 getegid32 sys_getegid
-203 i386 setreuid32 sys_setreuid
-204 i386 setregid32 sys_setregid
-205 i386 getgroups32 sys_getgroups
-206 i386 setgroups32 sys_setgroups
-207 i386 fchown32 sys_fchown
-208 i386 setresuid32 sys_setresuid
-209 i386 getresuid32 sys_getresuid
-210 i386 setresgid32 sys_setresgid
-211 i386 getresgid32 sys_getresgid
-212 i386 chown32 sys_chown
-213 i386 setuid32 sys_setuid
-214 i386 setgid32 sys_setgid
-215 i386 setfsuid32 sys_setfsuid
-216 i386 setfsgid32 sys_setfsgid
-217 i386 pivot_root sys_pivot_root
-218 i386 mincore sys_mincore
-219 i386 madvise sys_madvise
-220 i386 getdents64 sys_getdents64
-221 i386 fcntl64 sys_fcntl64 compat_sys_fcntl64
+203 i386 setreuid32 sys_setreuid __sys_ia32_setreuid
+204 i386 setregid32 sys_setregid __sys_ia32_setregid
+205 i386 getgroups32 sys_getgroups __sys_ia32_getgroups
+206 i386 setgroups32 sys_setgroups __sys_ia32_setgroups
+207 i386 fchown32 sys_fchown __sys_ia32_fchown
+208 i386 setresuid32 sys_setresuid __sys_ia32_setresuid
+209 i386 getresuid32 sys_getresuid __sys_ia32_getresuid
+210 i386 setresgid32 sys_setresgid __sys_ia32_setresgid
+211 i386 getresgid32 sys_getresgid __sys_ia32_getresgid
+212 i386 chown32 sys_chown __sys_ia32_chown
+213 i386 setuid32 sys_setuid __sys_ia32_setuid
+214 i386 setgid32 sys_setgid __sys_ia32_setgid
+215 i386 setfsuid32 sys_setfsuid __sys_ia32_setfsuid
+216 i386 setfsgid32 sys_setfsgid __sys_ia32_setfsgid
+217 i386 pivot_root sys_pivot_root __sys_ia32_pivot_root
+218 i386 mincore sys_mincore __sys_ia32_mincore
+219 i386 madvise sys_madvise __sys_ia32_madvise
+220 i386 getdents64 sys_getdents64 __sys_ia32_getdents64
+221 i386 fcntl64 sys_fcntl64 __compat_sys_ia32_fcntl64
# 222 is unused
# 223 is unused
224 i386 gettid sys_gettid
-225 i386 readahead sys_readahead compat_sys_x86_readahead
-226 i386 setxattr sys_setxattr
-227 i386 lsetxattr sys_lsetxattr
-228 i386 fsetxattr sys_fsetxattr
-229 i386 getxattr sys_getxattr
-230 i386 lgetxattr sys_lgetxattr
-231 i386 fgetxattr sys_fgetxattr
-232 i386 listxattr sys_listxattr
-233 i386 llistxattr sys_llistxattr
-234 i386 flistxattr sys_flistxattr
-235 i386 removexattr sys_removexattr
-236 i386 lremovexattr sys_lremovexattr
-237 i386 fremovexattr sys_fremovexattr
-238 i386 tkill sys_tkill
-239 i386 sendfile64 sys_sendfile64
-240 i386 futex sys_futex compat_sys_futex
-241 i386 sched_setaffinity sys_sched_setaffinity compat_sys_sched_setaffinity
-242 i386 sched_getaffinity sys_sched_getaffinity compat_sys_sched_getaffinity
-243 i386 set_thread_area sys_set_thread_area
-244 i386 get_thread_area sys_get_thread_area
-245 i386 io_setup sys_io_setup compat_sys_io_setup
-246 i386 io_destroy sys_io_destroy
-247 i386 io_getevents sys_io_getevents compat_sys_io_getevents
-248 i386 io_submit sys_io_submit compat_sys_io_submit
-249 i386 io_cancel sys_io_cancel
-250 i386 fadvise64 sys_fadvise64 compat_sys_x86_fadvise64
+225 i386 readahead sys_readahead __compat_sys_ia32_x86_readahead
+226 i386 setxattr sys_setxattr __sys_ia32_setxattr
+227 i386 lsetxattr sys_lsetxattr __sys_ia32_lsetxattr
+228 i386 fsetxattr sys_fsetxattr __sys_ia32_fsetxattr
+229 i386 getxattr sys_getxattr __sys_ia32_getxattr
+230 i386 lgetxattr sys_lgetxattr __sys_ia32_lgetxattr
+231 i386 fgetxattr sys_fgetxattr __sys_ia32_fgetxattr
+232 i386 listxattr sys_listxattr __sys_ia32_listxattr
+233 i386 llistxattr sys_llistxattr __sys_ia32_llistxattr
+234 i386 flistxattr sys_flistxattr __sys_ia32_flistxattr
+235 i386 removexattr sys_removexattr __sys_ia32_removexattr
+236 i386 lremovexattr sys_lremovexattr __sys_ia32_lremovexattr
+237 i386 fremovexattr sys_fremovexattr __sys_ia32_fremovexattr
+238 i386 tkill sys_tkill __sys_ia32_tkill
+239 i386 sendfile64 sys_sendfile64 __sys_ia32_sendfile64
+240 i386 futex sys_futex __compat_sys_ia32_futex
+241 i386 sched_setaffinity sys_sched_setaffinity __compat_sys_ia32_sched_setaffinity
+242 i386 sched_getaffinity sys_sched_getaffinity __compat_sys_ia32_sched_getaffinity
+243 i386 set_thread_area sys_set_thread_area __sys_ia32_set_thread_area
+244 i386 get_thread_area sys_get_thread_area __sys_ia32_get_thread_area
+245 i386 io_setup sys_io_setup __compat_sys_ia32_io_setup
+246 i386 io_destroy sys_io_destroy __sys_ia32_io_destroy
+247 i386 io_getevents sys_io_getevents __compat_sys_ia32_io_getevents
+248 i386 io_submit sys_io_submit __compat_sys_ia32_io_submit
+249 i386 io_cancel sys_io_cancel __sys_ia32_io_cancel
+250 i386 fadvise64 sys_fadvise64 __compat_sys_ia32_x86_fadvise64
# 251 is available for reuse (was briefly sys_set_zone_reclaim)
-252 i386 exit_group sys_exit_group
-253 i386 lookup_dcookie sys_lookup_dcookie compat_sys_lookup_dcookie
-254 i386 epoll_create sys_epoll_create
-255 i386 epoll_ctl sys_epoll_ctl
-256 i386 epoll_wait sys_epoll_wait
-257 i386 remap_file_pages sys_remap_file_pages
-258 i386 set_tid_address sys_set_tid_address
-259 i386 timer_create sys_timer_create compat_sys_timer_create
-260 i386 timer_settime sys_timer_settime compat_sys_timer_settime
-261 i386 timer_gettime sys_timer_gettime compat_sys_timer_gettime
-262 i386 timer_getoverrun sys_timer_getoverrun
-263 i386 timer_delete sys_timer_delete
-264 i386 clock_settime sys_clock_settime compat_sys_clock_settime
-265 i386 clock_gettime sys_clock_gettime compat_sys_clock_gettime
-266 i386 clock_getres sys_clock_getres compat_sys_clock_getres
-267 i386 clock_nanosleep sys_clock_nanosleep compat_sys_clock_nanosleep
-268 i386 statfs64 sys_statfs64 compat_sys_statfs64
-269 i386 fstatfs64 sys_fstatfs64 compat_sys_fstatfs64
-270 i386 tgkill sys_tgkill
-271 i386 utimes sys_utimes compat_sys_utimes
-272 i386 fadvise64_64 sys_fadvise64_64 compat_sys_x86_fadvise64_64
+252 i386 exit_group sys_exit_group __sys_ia32_exit_group
+253 i386 lookup_dcookie sys_lookup_dcookie __compat_sys_ia32_lookup_dcookie
+254 i386 epoll_create sys_epoll_create __sys_ia32_epoll_create
+255 i386 epoll_ctl sys_epoll_ctl __sys_ia32_epoll_ctl
+256 i386 epoll_wait sys_epoll_wait __sys_ia32_epoll_wait
+257 i386 remap_file_pages sys_remap_file_pages __sys_ia32_remap_file_pages
+258 i386 set_tid_address sys_set_tid_address __sys_ia32_set_tid_address
+259 i386 timer_create sys_timer_create __compat_sys_ia32_timer_create
+260 i386 timer_settime sys_timer_settime __compat_sys_ia32_timer_settime
+261 i386 timer_gettime sys_timer_gettime __compat_sys_ia32_timer_gettime
+262 i386 timer_getoverrun sys_timer_getoverrun __sys_ia32_timer_getoverrun
+263 i386 timer_delete sys_timer_delete __sys_ia32_timer_delete
+264 i386 clock_settime sys_clock_settime __compat_sys_ia32_clock_settime
+265 i386 clock_gettime sys_clock_gettime __compat_sys_ia32_clock_gettime
+266 i386 clock_getres sys_clock_getres __compat_sys_ia32_clock_getres
+267 i386 clock_nanosleep sys_clock_nanosleep __compat_sys_ia32_clock_nanosleep
+268 i386 statfs64 sys_statfs64 __compat_sys_ia32_statfs64
+269 i386 fstatfs64 sys_fstatfs64 __compat_sys_ia32_fstatfs64
+270 i386 tgkill sys_tgkill __sys_ia32_tgkill
+271 i386 utimes sys_utimes __compat_sys_ia32_utimes
+272 i386 fadvise64_64 sys_fadvise64_64 __compat_sys_ia32_x86_fadvise64_64
273 i386 vserver
-274 i386 mbind sys_mbind
-275 i386 get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy
-276 i386 set_mempolicy sys_set_mempolicy
-277 i386 mq_open sys_mq_open compat_sys_mq_open
-278 i386 mq_unlink sys_mq_unlink
-279 i386 mq_timedsend sys_mq_timedsend compat_sys_mq_timedsend
-280 i386 mq_timedreceive sys_mq_timedreceive compat_sys_mq_timedreceive
-281 i386 mq_notify sys_mq_notify compat_sys_mq_notify
-282 i386 mq_getsetattr sys_mq_getsetattr compat_sys_mq_getsetattr
-283 i386 kexec_load sys_kexec_load compat_sys_kexec_load
-284 i386 waitid sys_waitid compat_sys_waitid
+274 i386 mbind sys_mbind __sys_ia32_mbind
+275 i386 get_mempolicy sys_get_mempolicy __compat_sys_ia32_get_mempolicy
+276 i386 set_mempolicy sys_set_mempolicy __sys_ia32_set_mempolicy
+277 i386 mq_open sys_mq_open __compat_sys_ia32_mq_open
+278 i386 mq_unlink sys_mq_unlink __sys_ia32_mq_unlink
+279 i386 mq_timedsend sys_mq_timedsend __compat_sys_ia32_mq_timedsend
+280 i386 mq_timedreceive sys_mq_timedreceive __compat_sys_ia32_mq_timedreceive
+281 i386 mq_notify sys_mq_notify __compat_sys_ia32_mq_notify
+282 i386 mq_getsetattr sys_mq_getsetattr __compat_sys_ia32_mq_getsetattr
+283 i386 kexec_load sys_kexec_load __compat_sys_ia32_kexec_load
+284 i386 waitid sys_waitid __compat_sys_ia32_waitid
# 285 sys_setaltroot
-286 i386 add_key sys_add_key
-287 i386 request_key sys_request_key
-288 i386 keyctl sys_keyctl compat_sys_keyctl
-289 i386 ioprio_set sys_ioprio_set
-290 i386 ioprio_get sys_ioprio_get
+286 i386 add_key sys_add_key __sys_ia32_add_key
+287 i386 request_key sys_request_key __sys_ia32_request_key
+288 i386 keyctl sys_keyctl __compat_sys_ia32_keyctl
+289 i386 ioprio_set sys_ioprio_set __sys_ia32_ioprio_set
+290 i386 ioprio_get sys_ioprio_get __sys_ia32_ioprio_get
291 i386 inotify_init sys_inotify_init
-292 i386 inotify_add_watch sys_inotify_add_watch
-293 i386 inotify_rm_watch sys_inotify_rm_watch
-294 i386 migrate_pages sys_migrate_pages
-295 i386 openat sys_openat compat_sys_openat
-296 i386 mkdirat sys_mkdirat
-297 i386 mknodat sys_mknodat
-298 i386 fchownat sys_fchownat
-299 i386 futimesat sys_futimesat compat_sys_futimesat
-300 i386 fstatat64 sys_fstatat64 compat_sys_x86_fstatat
-301 i386 unlinkat sys_unlinkat
-302 i386 renameat sys_renameat
-303 i386 linkat sys_linkat
-304 i386 symlinkat sys_symlinkat
-305 i386 readlinkat sys_readlinkat
-306 i386 fchmodat sys_fchmodat
-307 i386 faccessat sys_faccessat
-308 i386 pselect6 sys_pselect6 compat_sys_pselect6
-309 i386 ppoll sys_ppoll compat_sys_ppoll
-310 i386 unshare sys_unshare
-311 i386 set_robust_list sys_set_robust_list compat_sys_set_robust_list
-312 i386 get_robust_list sys_get_robust_list compat_sys_get_robust_list
-313 i386 splice sys_splice
-314 i386 sync_file_range sys_sync_file_range compat_sys_x86_sync_file_range
-315 i386 tee sys_tee
-316 i386 vmsplice sys_vmsplice compat_sys_vmsplice
-317 i386 move_pages sys_move_pages compat_sys_move_pages
-318 i386 getcpu sys_getcpu
-319 i386 epoll_pwait sys_epoll_pwait
-320 i386 utimensat sys_utimensat compat_sys_utimensat
-321 i386 signalfd sys_signalfd compat_sys_signalfd
-322 i386 timerfd_create sys_timerfd_create
-323 i386 eventfd sys_eventfd
-324 i386 fallocate sys_fallocate compat_sys_x86_fallocate
-325 i386 timerfd_settime sys_timerfd_settime compat_sys_timerfd_settime
-326 i386 timerfd_gettime sys_timerfd_gettime compat_sys_timerfd_gettime
-327 i386 signalfd4 sys_signalfd4 compat_sys_signalfd4
-328 i386 eventfd2 sys_eventfd2
-329 i386 epoll_create1 sys_epoll_create1
-330 i386 dup3 sys_dup3
-331 i386 pipe2 sys_pipe2
-332 i386 inotify_init1 sys_inotify_init1
-333 i386 preadv sys_preadv compat_sys_preadv
-334 i386 pwritev sys_pwritev compat_sys_pwritev
-335 i386 rt_tgsigqueueinfo sys_rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
-336 i386 perf_event_open sys_perf_event_open
-337 i386 recvmmsg sys_recvmmsg compat_sys_recvmmsg
-338 i386 fanotify_init sys_fanotify_init
-339 i386 fanotify_mark sys_fanotify_mark compat_sys_fanotify_mark
-340 i386 prlimit64 sys_prlimit64
-341 i386 name_to_handle_at sys_name_to_handle_at
-342 i386 open_by_handle_at sys_open_by_handle_at compat_sys_open_by_handle_at
-343 i386 clock_adjtime sys_clock_adjtime compat_sys_clock_adjtime
-344 i386 syncfs sys_syncfs
-345 i386 sendmmsg sys_sendmmsg compat_sys_sendmmsg
-346 i386 setns sys_setns
-347 i386 process_vm_readv sys_process_vm_readv compat_sys_process_vm_readv
-348 i386 process_vm_writev sys_process_vm_writev compat_sys_process_vm_writev
-349 i386 kcmp sys_kcmp
-350 i386 finit_module sys_finit_module
-351 i386 sched_setattr sys_sched_setattr
-352 i386 sched_getattr sys_sched_getattr
-353 i386 renameat2 sys_renameat2
-354 i386 seccomp sys_seccomp
-355 i386 getrandom sys_getrandom
-356 i386 memfd_create sys_memfd_create
-357 i386 bpf sys_bpf
-358 i386 execveat sys_execveat compat_sys_execveat
-359 i386 socket sys_socket
-360 i386 socketpair sys_socketpair
-361 i386 bind sys_bind
-362 i386 connect sys_connect
-363 i386 listen sys_listen
-364 i386 accept4 sys_accept4
-365 i386 getsockopt sys_getsockopt compat_sys_getsockopt
-366 i386 setsockopt sys_setsockopt compat_sys_setsockopt
-367 i386 getsockname sys_getsockname
-368 i386 getpeername sys_getpeername
-369 i386 sendto sys_sendto
-370 i386 sendmsg sys_sendmsg compat_sys_sendmsg
-371 i386 recvfrom sys_recvfrom compat_sys_recvfrom
-372 i386 recvmsg sys_recvmsg compat_sys_recvmsg
-373 i386 shutdown sys_shutdown
-374 i386 userfaultfd sys_userfaultfd
-375 i386 membarrier sys_membarrier
-376 i386 mlock2 sys_mlock2
-377 i386 copy_file_range sys_copy_file_range
-378 i386 preadv2 sys_preadv2 compat_sys_preadv2
-379 i386 pwritev2 sys_pwritev2 compat_sys_pwritev2
-380 i386 pkey_mprotect sys_pkey_mprotect
-381 i386 pkey_alloc sys_pkey_alloc
-382 i386 pkey_free sys_pkey_free
-383 i386 statx sys_statx
-384 i386 arch_prctl sys_arch_prctl compat_sys_arch_prctl
+292 i386 inotify_add_watch sys_inotify_add_watch __sys_ia32_inotify_add_watch
+293 i386 inotify_rm_watch sys_inotify_rm_watch __sys_ia32_inotify_rm_watch
+294 i386 migrate_pages sys_migrate_pages __sys_ia32_migrate_pages
+295 i386 openat sys_openat __compat_sys_ia32_openat
+296 i386 mkdirat sys_mkdirat __sys_ia32_mkdirat
+297 i386 mknodat sys_mknodat __sys_ia32_mknodat
+298 i386 fchownat sys_fchownat __sys_ia32_fchownat
+299 i386 futimesat sys_futimesat __compat_sys_ia32_futimesat
+300 i386 fstatat64 sys_fstatat64 __compat_sys_ia32_x86_fstatat
+301 i386 unlinkat sys_unlinkat __sys_ia32_unlinkat
+302 i386 renameat sys_renameat __sys_ia32_renameat
+303 i386 linkat sys_linkat __sys_ia32_linkat
+304 i386 symlinkat sys_symlinkat __sys_ia32_symlinkat
+305 i386 readlinkat sys_readlinkat __sys_ia32_readlinkat
+306 i386 fchmodat sys_fchmodat __sys_ia32_fchmodat
+307 i386 faccessat sys_faccessat __sys_ia32_faccessat
+308 i386 pselect6 sys_pselect6 __compat_sys_ia32_pselect6
+309 i386 ppoll sys_ppoll __compat_sys_ia32_ppoll
+310 i386 unshare sys_unshare __sys_ia32_unshare
+311 i386 set_robust_list sys_set_robust_list __compat_sys_ia32_set_robust_list
+312 i386 get_robust_list sys_get_robust_list __compat_sys_ia32_get_robust_list
+313 i386 splice sys_splice __sys_ia32_splice
+314 i386 sync_file_range sys_sync_file_range __compat_sys_ia32_x86_sync_file_range
+315 i386 tee sys_tee __sys_ia32_tee
+316 i386 vmsplice sys_vmsplice __compat_sys_ia32_vmsplice
+317 i386 move_pages sys_move_pages __compat_sys_ia32_move_pages
+318 i386 getcpu sys_getcpu __sys_ia32_getcpu
+319 i386 epoll_pwait sys_epoll_pwait __sys_ia32_epoll_pwait
+320 i386 utimensat sys_utimensat __compat_sys_ia32_utimensat
+321 i386 signalfd sys_signalfd __compat_sys_ia32_signalfd
+322 i386 timerfd_create sys_timerfd_create __sys_ia32_timerfd_create
+323 i386 eventfd sys_eventfd __sys_ia32_eventfd
+324 i386 fallocate sys_fallocate __compat_sys_ia32_x86_fallocate
+325 i386 timerfd_settime sys_timerfd_settime __compat_sys_ia32_timerfd_settime
+326 i386 timerfd_gettime sys_timerfd_gettime __compat_sys_ia32_timerfd_gettime
+327 i386 signalfd4 sys_signalfd4 __compat_sys_ia32_signalfd4
+328 i386 eventfd2 sys_eventfd2 __sys_ia32_eventfd2
+329 i386 epoll_create1 sys_epoll_create1 __sys_ia32_epoll_create1
+330 i386 dup3 sys_dup3 __sys_ia32_dup3
+331 i386 pipe2 sys_pipe2 __sys_ia32_pipe2
+332 i386 inotify_init1 sys_inotify_init1 __sys_ia32_inotify_init1
+333 i386 preadv sys_preadv __compat_sys_ia32_preadv
+334 i386 pwritev sys_pwritev __compat_sys_ia32_pwritev
+335 i386 rt_tgsigqueueinfo sys_rt_tgsigqueueinfo __compat_sys_ia32_rt_tgsigqueueinfo
+336 i386 perf_event_open sys_perf_event_open __sys_ia32_perf_event_open
+337 i386 recvmmsg sys_recvmmsg __compat_sys_ia32_recvmmsg
+338 i386 fanotify_init sys_fanotify_init __sys_ia32_fanotify_init
+339 i386 fanotify_mark sys_fanotify_mark __compat_sys_ia32_fanotify_mark
+340 i386 prlimit64 sys_prlimit64 __sys_ia32_prlimit64
+341 i386 name_to_handle_at sys_name_to_handle_at __sys_ia32_name_to_handle_at
+342 i386 open_by_handle_at sys_open_by_handle_at __compat_sys_ia32_open_by_handle_at
+343 i386 clock_adjtime sys_clock_adjtime __compat_sys_ia32_clock_adjtime
+344 i386 syncfs sys_syncfs __sys_ia32_syncfs
+345 i386 sendmmsg sys_sendmmsg __compat_sys_ia32_sendmmsg
+346 i386 setns sys_setns __sys_ia32_setns
+347 i386 process_vm_readv sys_process_vm_readv __compat_sys_ia32_process_vm_readv
+348 i386 process_vm_writev sys_process_vm_writev __compat_sys_ia32_process_vm_writev
+349 i386 kcmp sys_kcmp __sys_ia32_kcmp
+350 i386 finit_module sys_finit_module __sys_ia32_finit_module
+351 i386 sched_setattr sys_sched_setattr __sys_ia32_sched_setattr
+352 i386 sched_getattr sys_sched_getattr __sys_ia32_sched_getattr
+353 i386 renameat2 sys_renameat2 __sys_ia32_renameat2
+354 i386 seccomp sys_seccomp __sys_ia32_seccomp
+355 i386 getrandom sys_getrandom __sys_ia32_getrandom
+356 i386 memfd_create sys_memfd_create __sys_ia32_memfd_create
+357 i386 bpf sys_bpf __sys_ia32_bpf
+358 i386 execveat sys_execveat __compat_sys_ia32_execveat
+359 i386 socket sys_socket __sys_ia32_socket
+360 i386 socketpair sys_socketpair __sys_ia32_socketpair
+361 i386 bind sys_bind __sys_ia32_bind
+362 i386 connect sys_connect __sys_ia32_connect
+363 i386 listen sys_listen __sys_ia32_listen
+364 i386 accept4 sys_accept4 __sys_ia32_accept4
+365 i386 getsockopt sys_getsockopt __compat_sys_ia32_getsockopt
+366 i386 setsockopt sys_setsockopt __compat_sys_ia32_setsockopt
+367 i386 getsockname sys_getsockname __sys_ia32_getsockname
+368 i386 getpeername sys_getpeername __sys_ia32_getpeername
+369 i386 sendto sys_sendto __sys_ia32_sendto
+370 i386 sendmsg sys_sendmsg __compat_sys_ia32_sendmsg
+371 i386 recvfrom sys_recvfrom __compat_sys_ia32_recvfrom
+372 i386 recvmsg sys_recvmsg __compat_sys_ia32_recvmsg
+373 i386 shutdown sys_shutdown __sys_ia32_shutdown
+374 i386 userfaultfd sys_userfaultfd __sys_ia32_userfaultfd
+375 i386 membarrier sys_membarrier __sys_ia32_membarrier
+376 i386 mlock2 sys_mlock2 __sys_ia32_mlock2
+377 i386 copy_file_range sys_copy_file_range __sys_ia32_copy_file_range
+378 i386 preadv2 sys_preadv2 __compat_sys_ia32_preadv2
+379 i386 pwritev2 sys_pwritev2 __compat_sys_ia32_pwritev2
+380 i386 pkey_mprotect sys_pkey_mprotect __sys_ia32_pkey_mprotect
+381 i386 pkey_alloc sys_pkey_alloc __sys_ia32_pkey_alloc
+382 i386 pkey_free sys_pkey_free __sys_ia32_pkey_free
+383 i386 statx sys_statx __sys_ia32_statx
+384 i386 arch_prctl sys_arch_prctl __compat_sys_ia32_arch_prctl
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 5aef183e2f85..a83c0f7f462f 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -342,41 +342,43 @@

#
# x32-specific system call numbers start at 512 to avoid cache impact
-# for native 64-bit operation.
+# for native 64-bit operation. The __compat_sys_x32 stubs are created
+# on-the-fly for compat_sys_*() compatibility system calls if X86_X32
+# is defined.
#
-512 x32 rt_sigaction compat_sys_rt_sigaction
+512 x32 rt_sigaction __compat_sys_x32_rt_sigaction
513 x32 rt_sigreturn sys32_x32_rt_sigreturn
-514 x32 ioctl compat_sys_ioctl
-515 x32 readv compat_sys_readv
-516 x32 writev compat_sys_writev
-517 x32 recvfrom compat_sys_recvfrom
-518 x32 sendmsg compat_sys_sendmsg
-519 x32 recvmsg compat_sys_recvmsg
-520 x32 execve compat_sys_execve/ptregs
-521 x32 ptrace compat_sys_ptrace
-522 x32 rt_sigpending compat_sys_rt_sigpending
-523 x32 rt_sigtimedwait compat_sys_rt_sigtimedwait
-524 x32 rt_sigqueueinfo compat_sys_rt_sigqueueinfo
-525 x32 sigaltstack compat_sys_sigaltstack
-526 x32 timer_create compat_sys_timer_create
-527 x32 mq_notify compat_sys_mq_notify
-528 x32 kexec_load compat_sys_kexec_load
-529 x32 waitid compat_sys_waitid
-530 x32 set_robust_list compat_sys_set_robust_list
-531 x32 get_robust_list compat_sys_get_robust_list
-532 x32 vmsplice compat_sys_vmsplice
-533 x32 move_pages compat_sys_move_pages
-534 x32 preadv compat_sys_preadv64
-535 x32 pwritev compat_sys_pwritev64
-536 x32 rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
-537 x32 recvmmsg compat_sys_recvmmsg
-538 x32 sendmmsg compat_sys_sendmmsg
-539 x32 process_vm_readv compat_sys_process_vm_readv
-540 x32 process_vm_writev compat_sys_process_vm_writev
-541 x32 setsockopt compat_sys_setsockopt
-542 x32 getsockopt compat_sys_getsockopt
-543 x32 io_setup compat_sys_io_setup
-544 x32 io_submit compat_sys_io_submit
-545 x32 execveat compat_sys_execveat/ptregs
-546 x32 preadv2 compat_sys_preadv64v2
-547 x32 pwritev2 compat_sys_pwritev64v2
+514 x32 ioctl __compat_sys_x32_ioctl
+515 x32 readv __compat_sys_x32_readv
+516 x32 writev __compat_sys_x32_writev
+517 x32 recvfrom __compat_sys_x32_recvfrom
+518 x32 sendmsg __compat_sys_x32_sendmsg
+519 x32 recvmsg __compat_sys_x32_recvmsg
+520 x32 execve __compat_sys_x32_execve/ptregs
+521 x32 ptrace __compat_sys_x32_ptrace
+522 x32 rt_sigpending __compat_sys_x32_rt_sigpending
+523 x32 rt_sigtimedwait __compat_sys_x32_rt_sigtimedwait
+524 x32 rt_sigqueueinfo __compat_sys_x32_rt_sigqueueinfo
+525 x32 sigaltstack __compat_sys_x32_sigaltstack
+526 x32 timer_create __compat_sys_x32_timer_create
+527 x32 mq_notify __compat_sys_x32_mq_notify
+528 x32 kexec_load __compat_sys_x32_kexec_load
+529 x32 waitid __compat_sys_x32_waitid
+530 x32 set_robust_list __compat_sys_x32_set_robust_list
+531 x32 get_robust_list __compat_sys_x32_get_robust_list
+532 x32 vmsplice __compat_sys_x32_vmsplice
+533 x32 move_pages __compat_sys_x32_move_pages
+534 x32 preadv __compat_sys_x32_preadv64
+535 x32 pwritev __compat_sys_x32_pwritev64
+536 x32 rt_tgsigqueueinfo __compat_sys_x32_rt_tgsigqueueinfo
+537 x32 recvmmsg __compat_sys_x32_recvmmsg
+538 x32 sendmmsg __compat_sys_x32_sendmmsg
+539 x32 process_vm_readv __compat_sys_x32_process_vm_readv
+540 x32 process_vm_writev __compat_sys_x32_process_vm_writev
+541 x32 setsockopt __compat_sys_x32_setsockopt
+542 x32 getsockopt __compat_sys_x32_getsockopt
+543 x32 io_setup __compat_sys_x32_io_setup
+544 x32 io_submit __compat_sys_x32_io_submit
+545 x32 execveat __compat_sys_x32_execveat/ptregs
+546 x32 preadv2 __compat_sys_x32_preadv64v2
+547 x32 pwritev2 __compat_sys_x32_pwritev64v2
diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h
index 702bdee377af..49d7e4970110 100644
--- a/arch/x86/include/asm/syscall_wrapper.h
+++ b/arch/x86/include/asm/syscall_wrapper.h
@@ -6,6 +6,111 @@
#ifndef _ASM_X86_SYSCALL_WRAPPER_H
#define _ASM_X86_SYSCALL_WRAPPER_H

+/* Mapping of registers to parameters for syscalls on x86-64 and x32 */
+#define SC_X86_64_REGS_TO_ARGS(x, ...) \
+ __MAP(x,__SC_ARGS \
+ ,,regs->di,,regs->si,,regs->dx \
+ ,,regs->r10,,regs->r8,,regs->r9) \
+
+/* Mapping of registers to parameters for syscalls on i386 */
+#define SC_IA32_REGS_TO_ARGS(x, ...) \
+ __MAP(x,__SC_ARGS \
+ ,,(unsigned int)regs->bx,,(unsigned int)regs->cx \
+ ,,(unsigned int)regs->dx,,(unsigned int)regs->si \
+ ,,(unsigned int)regs->di,,(unsigned int)regs->bp)
+
+#ifdef CONFIG_IA32_EMULATION
+/*
+ * For IA32 emulation, we need to handle "compat" syscalls *and* create
+ * additional wrappers (aptly named __sys_ia32_sys_xyzzy) which decode the
+ * ia32 regs in the proper order for shared or "common" syscalls. As some
+ * syscalls may not be implemented, we need to expand COND_SYSCALL in
+ * kernel/sys_ni.c and SYS_NI in kernel/time/posix-stubs.c to cover this
+ * case as well.
+ */
+#define COMPAT_SC_IA32_STUBx(x, name, ...) \
+ asmlinkage long __compat_sys_ia32##name(const struct pt_regs *regs);\
+ ALLOW_ERROR_INJECTION(__compat_sys_ia32##name, ERRNO); \
+ asmlinkage long __compat_sys_ia32##name(const struct pt_regs *regs)\
+ { \
+ return c_SyS##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__));\
+ } \
+
+#define SC_IA32_WRAPPERx(x, name, ...) \
+ asmlinkage long __sys_ia32##name(const struct pt_regs *regs); \
+ ALLOW_ERROR_INJECTION(__sys_ia32##name, ERRNO); \
+ asmlinkage long __sys_ia32##name(const struct pt_regs *regs) \
+ { \
+ return SyS##name(SC_IA32_REGS_TO_ARGS(x,__VA_ARGS__)); \
+ }
+
+#define COND_SYSCALL(name) \
+ cond_syscall(sys_##name); \
+ cond_syscall(__sys_ia32_##name)
+
+#define SYS_NI(name) \
+ SYSCALL_ALIAS(sys_##name, sys_ni_posix_timers); \
+ SYSCALL_ALIAS(__sys_ia32_##name, sys_ni_posix_timers)
+
+#else /* CONFIG_IA32_EMULATION */
+#define COMPAT_SC_IA32_STUBx(x, name, ...)
+#define SC_IA32_WRAPPERx(x, fullname, name, ...)
+#endif /* CONFIG_IA32_EMULATION */
+
+
+#ifdef CONFIG_X86_X32
+/*
+ * For the x32 ABI, we need to create a stub for compat_sys_*() which is aware
+ * of the x86-64-style parameter ordering of x32 syscalls. The syscalls common
+ * with x86_64 obviously do not need such care.
+ */
+#define COMPAT_SC_X32_STUBx(x, name, ...) \
+ asmlinkage long __compat_sys_x32##name(const struct pt_regs *regs);\
+ ALLOW_ERROR_INJECTION(__compat_sys_x32##name, ERRNO); \
+ asmlinkage long __compat_sys_x32##name(const struct pt_regs *regs)\
+ { \
+ return c_SyS##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\
+ } \
+
+#else /* CONFIG_X86_X32 */
+#define COMPAT_SC_X32_STUBx(x, name, ...)
+#endif /* CONFIG_X86_X32 */
+
+
+#ifdef CONFIG_COMPAT
+/*
+ * Compat means IA32_EMULATION and/or X86_X32. As they use a different
+ * mapping of registers to parameters, we need to generate stubs for each
+ * of them. There is no need to implement COMPAT_SYSCALL_DEFINE0, as it is
+ * unused on x86.
+ */
+#define COMPAT_SYSCALL_DEFINEx(x, name, ...) \
+ static long c_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \
+ static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
+ COMPAT_SC_IA32_STUBx(x, name, __VA_ARGS__) \
+ COMPAT_SC_X32_STUBx(x, name, __VA_ARGS__) \
+ static long c_SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
+ { \
+ return C_SYSC##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__)); \
+ } \
+ static inline long C_SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))
+
+/*
+ * As some compat syscalls may not be implemented, we need to expand
+ * COND_SYSCALL_COMPAT in kernel/sys_ni.c and COMPAT_SYS_NI in
+ * kernel/time/posix-stubs.c to cover this case as well.
+ */
+#define COND_SYSCALL_COMPAT(name) \
+ cond_syscall(__compat_sys_ia32_##name); \
+ cond_syscall(__compat_sys_x32_##name)
+
+#define COMPAT_SYS_NI(name) \
+ SYSCALL_ALIAS(__compat_sys_ia32_##name, sys_ni_posix_timers); \
+ SYSCALL_ALIAS(__compat_sys_x32_##name, sys_ni_posix_timers)
+
+#endif /* CONFIG_COMPAT */
+
+
/*
* Instead of the generic __SYSCALL_DEFINEx() definition, this macro takes
* struct pt_regs *regs as the only argument of the syscall stub named
@@ -34,9 +139,14 @@
* This approach avoids leaking random user-provided register content down
* the call chain.
*
+ * If IA32_EMULATION is enabled, this macro generates an additional wrapper
+ * named __sys_ia32_*() which decodes the struct pt_regs *regs according
+ * to the i386 calling convention (bx, cx, dx, si, di, bp).
+ *
* As the generic SYSCALL_DEFINE0() macro does not decode any parameters for
* obvious reasons, and passing struct pt_regs *regs to it in %rdi does not
- * hurt, there is no need to override it.
+ * hurt, there is no need to override it, or to define it differently for
+ * IA32_EMULATION.
*/
#define __SYSCALL_DEFINEx(x, name, ...) \
asmlinkage long sys##name(const struct pt_regs *regs); \
@@ -45,10 +155,9 @@
static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
asmlinkage long sys##name(const struct pt_regs *regs) \
{ \
- return SyS##name(__MAP(x,__SC_ARGS \
- ,,regs->di,,regs->si,,regs->dx \
- ,,regs->r10,,regs->r8,,regs->r9)); \
+ return SyS##name(SC_X86_64_REGS_TO_ARGS(x,__VA_ARGS__));\
} \
+ SC_IA32_WRAPPERx(x, name, __VA_ARGS__) \
static long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
{ \
long ret = SYSC##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
--
2.16.3