[PATCH v3 21/31] arm64: 32-bit (compat) applications support

From: Catalin Marinas
Date: Fri Sep 07 2012 - 12:32:05 EST

From: Will Deacon <will.deacon@xxxxxxx>

This patch adds support for 32-bit applications. The vectors page is a
binary blob mapped into the application user space at 0xffff0000 (the
AArch64 toolchain does not support compilation of AArch32 code). Full
compatibility with ARMv7 user space is supported. The use of deprecated
ARMv7 functionality (SWP, CP15 barriers) has been disabled by default on
AArch64 kernels and unaligned LDM/STM is not supported.

Please note that only the ARM 32-bit EABI is supported, so no OABI
compatibility.

Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm64/include/asm/compat.h | 242 ++++++++++
arch/arm64/include/asm/signal32.h | 53 +++
arch/arm64/include/asm/unistd32.h | 758 ++++++++++++++++++++++++++++++++
arch/arm64/kernel/kuser32.S | 77 ++++
arch/arm64/kernel/signal32.c | 876 +++++++++++++++++++++++++++++++++++++
arch/arm64/kernel/sys32.S | 282 ++++++++++++
arch/arm64/kernel/sys_compat.c | 164 +++++++
7 files changed, 2452 insertions(+), 0 deletions(-)
create mode 100644 arch/arm64/include/asm/compat.h
create mode 100644 arch/arm64/include/asm/signal32.h
create mode 100644 arch/arm64/include/asm/unistd32.h
create mode 100644 arch/arm64/kernel/kuser32.S
create mode 100644 arch/arm64/kernel/signal32.c
create mode 100644 arch/arm64/kernel/sys32.S
create mode 100644 arch/arm64/kernel/sys_compat.c

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
new file mode 100644
index 0000000..a670a33
--- /dev/null
+++ b/arch/arm64/include/asm/compat.h
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_COMPAT_H
+#define __ASM_COMPAT_H
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+
+/*
+ * Architecture specific compatibility types
+ */
+#include <linux/types.h>
+#include <linux/sched.h>
+
+#define COMPAT_USER_HZ 100
+#define COMPAT_UTS_MACHINE "armv8l\0\0"
+
+typedef u32 compat_size_t;
+typedef s32 compat_ssize_t;
+typedef s32 compat_time_t;
+typedef s32 compat_clock_t;
+typedef s32 compat_pid_t;
+typedef u32 __compat_uid_t;
+typedef u32 __compat_gid_t;
+typedef u32 __compat_uid32_t;
+typedef u32 __compat_gid32_t;
+typedef u32 compat_mode_t;
+typedef u32 compat_ino_t;
+typedef u32 compat_dev_t;
+typedef s32 compat_off_t;
+typedef s64 compat_loff_t;
+typedef s16 compat_nlink_t;
+typedef u16 compat_ipc_pid_t;
+typedef s32 compat_daddr_t;
+typedef u32 compat_caddr_t;
+typedef __kernel_fsid_t compat_fsid_t;
+typedef s32 compat_key_t;
+typedef s32 compat_timer_t;
+
+typedef s32 compat_int_t;
+typedef s32 compat_long_t;
+typedef s64 compat_s64;
+typedef u32 compat_uint_t;
+typedef u32 compat_ulong_t;
+typedef u64 compat_u64;
+
+struct compat_timespec {
+ compat_time_t tv_sec;
+ s32 tv_nsec;
+};
+
+struct compat_timeval {
+ compat_time_t tv_sec;
+ s32 tv_usec;
+};
+
+struct compat_stat {
+ compat_dev_t st_dev;
+ compat_ino_t st_ino;
+ compat_mode_t st_mode;
+ compat_nlink_t st_nlink;
+ __compat_uid32_t st_uid;
+ __compat_gid32_t st_gid;
+ compat_dev_t st_rdev;
+ compat_off_t st_size;
+ compat_off_t st_blksize;
+ compat_off_t st_blocks;
+ compat_time_t st_atime;
+ u32 st_atime_nsec;
+ compat_time_t st_mtime;
+ u32 st_mtime_nsec;
+ compat_time_t st_ctime;
+ u32 st_ctime_nsec;
+ u32 __unused4[2];
+};
+
+struct compat_flock {
+ short l_type;
+ short l_whence;
+ compat_off_t l_start;
+ compat_off_t l_len;
+ compat_pid_t l_pid;
+};
+
+#define F_GETLK64 12 /* using 'struct flock64' */
+#define F_SETLK64 13
+#define F_SETLKW64 14
+
+struct compat_flock64 {
+ short l_type;
+ short l_whence;
+ compat_loff_t l_start;
+ compat_loff_t l_len;
+ compat_pid_t l_pid;
+};
+
+struct compat_statfs {
+ int f_type;
+ int f_bsize;
+ int f_blocks;
+ int f_bfree;
+ int f_bavail;
+ int f_files;
+ int f_ffree;
+ compat_fsid_t f_fsid;
+ int f_namelen; /* SunOS ignores this field. */
+ int f_frsize;
+ int f_flags;
+ int f_spare[4];
+};
+
+#define COMPAT_RLIM_INFINITY 0xffffffff
+
+typedef u32 compat_old_sigset_t;
+
+#define _COMPAT_NSIG 64
+#define _COMPAT_NSIG_BPW 32
+
+typedef u32 compat_sigset_word;
+
+#define COMPAT_OFF_T_MAX 0x7fffffff
+#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
+
+/*
+ * A pointer passed in from user mode. This should not
+ * be used for syscall parameters, just declare them
+ * as pointers because the syscall entry code will have
+ * appropriately converted them already.
+ */
+typedef u32 compat_uptr_t;
+
+static inline void __user *compat_ptr(compat_uptr_t uptr)
+{
+ return (void __user *)(unsigned long)uptr;
+}
+
+static inline compat_uptr_t ptr_to_compat(void __user *uptr)
+{
+ return (u32)(unsigned long)uptr;
+}
+
+static inline void __user *arch_compat_alloc_user_space(long len)
+{
+ struct pt_regs *regs = task_pt_regs(current);
+ return (void __user *)regs->compat_sp - len;
+}
+
+struct compat_ipc64_perm {
+ compat_key_t key;
+ __compat_uid32_t uid;
+ __compat_gid32_t gid;
+ __compat_uid32_t cuid;
+ __compat_gid32_t cgid;
+ unsigned short mode;
+ unsigned short __pad1;
+ unsigned short seq;
+ unsigned short __pad2;
+ compat_ulong_t unused1;
+ compat_ulong_t unused2;
+};
+
+struct compat_semid64_ds {
+ struct compat_ipc64_perm sem_perm;
+ compat_time_t sem_otime;
+ compat_ulong_t __unused1;
+ compat_time_t sem_ctime;
+ compat_ulong_t __unused2;
+ compat_ulong_t sem_nsems;
+ compat_ulong_t __unused3;
+ compat_ulong_t __unused4;
+};
+
+struct compat_msqid64_ds {
+ struct compat_ipc64_perm msg_perm;
+ compat_time_t msg_stime;
+ compat_ulong_t __unused1;
+ compat_time_t msg_rtime;
+ compat_ulong_t __unused2;
+ compat_time_t msg_ctime;
+ compat_ulong_t __unused3;
+ compat_ulong_t msg_cbytes;
+ compat_ulong_t msg_qnum;
+ compat_ulong_t msg_qbytes;
+ compat_pid_t msg_lspid;
+ compat_pid_t msg_lrpid;
+ compat_ulong_t __unused4;
+ compat_ulong_t __unused5;
+};
+
+struct compat_shmid64_ds {
+ struct compat_ipc64_perm shm_perm;
+ compat_size_t shm_segsz;
+ compat_time_t shm_atime;
+ compat_ulong_t __unused1;
+ compat_time_t shm_dtime;
+ compat_ulong_t __unused2;
+ compat_time_t shm_ctime;
+ compat_ulong_t __unused3;
+ compat_pid_t shm_cpid;
+ compat_pid_t shm_lpid;
+ compat_ulong_t shm_nattch;
+ compat_ulong_t __unused4;
+ compat_ulong_t __unused5;
+};
+
+static inline int is_compat_task(void)
+{
+ return test_thread_flag(TIF_32BIT);
+}
+
+static inline int is_compat_thread(struct thread_info *thread)
+{
+ return test_ti_thread_flag(thread, TIF_32BIT);
+}
+
+#else /* !CONFIG_COMPAT */
+
+static inline int is_compat_task(void)
+{
+ return 0;
+}
+
+static inline int is_compat_thread(struct thread_info *thread)
+{
+ return 0;
+}
+
+#endif /* CONFIG_COMPAT */
+#endif /* __KERNEL__ */
+#endif /* __ASM_COMPAT_H */
diff --git a/arch/arm64/include/asm/signal32.h b/arch/arm64/include/asm/signal32.h
new file mode 100644
index 0000000..7c275e3
--- /dev/null
+++ b/arch/arm64/include/asm/signal32.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_SIGNAL32_H
+#define __ASM_SIGNAL32_H
+
+#ifdef __KERNEL__
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+
+#define AARCH32_KERN_SIGRET_CODE_OFFSET 0x500
+
+extern const compat_ulong_t aarch32_sigret_code[6];
+
+int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
+ struct pt_regs *regs);
+int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs);
+
+void compat_setup_restart_syscall(struct pt_regs *regs);
+#else
+
+static inline int compat_setup_frame(int usid, struct k_sigaction *ka,
+ sigset_t *set, struct pt_regs *regs)
+{
+ return -ENOSYS;
+}
+
+static inline int compat_setup_rt_frame(int usig, struct k_sigaction *ka,
+ siginfo_t *info, sigset_t *set,
+ struct pt_regs *regs)
+{
+ return -ENOSYS;
+}
+
+static inline void compat_setup_restart_syscall(struct pt_regs *regs)
+{
+}
+#endif /* CONFIG_COMPAT */
+#endif /* __KERNEL__ */
+#endif /* __ASM_SIGNAL32_H */
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
new file mode 100644
index 0000000..a50405f
--- /dev/null
+++ b/arch/arm64/include/asm/unistd32.h
@@ -0,0 +1,758 @@
+/*
+ * Based on arch/arm/include/asm/unistd.h
+ *
+ * Copyright (C) 2001-2005 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#if !defined(__ASM_UNISTD32_H) || defined(__SYSCALL)
+#define __ASM_UNISTD32_H
+
+#ifndef __SYSCALL
+#define __SYSCALL(x, y)
+#endif
+
+/*
+ * This file contains the system call numbers.
+ */
+
+#ifdef __SYSCALL_COMPAT
+
+#define __NR_restart_syscall 0
+__SYSCALL(__NR_restart_syscall, sys_restart_syscall)
+#define __NR_exit 1
+__SYSCALL(__NR_exit, sys_exit)
+#define __NR_fork 2
+__SYSCALL(__NR_fork, sys_fork)
+#define __NR_read 3
+__SYSCALL(__NR_read, sys_read)
+#define __NR_write 4
+__SYSCALL(__NR_write, sys_write)
+#define __NR_open 5
+__SYSCALL(__NR_open, sys_open)
+#define __NR_close 6
+__SYSCALL(__NR_close, sys_close)
+__SYSCALL(7, sys_ni_syscall) /* 7 was sys_waitpid */
+#define __NR_creat 8
+__SYSCALL(__NR_creat, sys_creat)
+#define __NR_link 9
+__SYSCALL(__NR_link, sys_link)
+#define __NR_unlink 10
+__SYSCALL(__NR_unlink, sys_unlink)
+#define __NR_execve 11
+__SYSCALL(__NR_execve, sys_execve)
+#define __NR_chdir 12
+__SYSCALL(__NR_chdir, sys_chdir)
+__SYSCALL(13, sys_ni_syscall) /* 13 was sys_time */
+#define __NR_mknod 14
+__SYSCALL(__NR_mknod, sys_mknod)
+#define __NR_chmod 15
+__SYSCALL(__NR_chmod, sys_chmod)
+#define __NR_lchown 16
+__SYSCALL(__NR_lchown, sys_lchown16)
+__SYSCALL(17, sys_ni_syscall) /* 17 was sys_break */
+__SYSCALL(18, sys_ni_syscall) /* 18 was sys_stat */
+#define __NR_lseek 19
+__SYSCALL(__NR_lseek, sys_lseek)
+#define __NR_getpid 20
+__SYSCALL(__NR_getpid, sys_getpid)
+#define __NR_mount 21
+__SYSCALL(__NR_mount, sys_mount)
+__SYSCALL(22, sys_ni_syscall) /* 22 was sys_umount */
+#define __NR_setuid 23
+__SYSCALL(__NR_setuid, sys_setuid16)
+#define __NR_getuid 24
+__SYSCALL(__NR_getuid, sys_getuid16)
+__SYSCALL(25, sys_ni_syscall) /* 25 was sys_stime */
+#define __NR_ptrace 26
+__SYSCALL(__NR_ptrace, sys_ptrace)
+__SYSCALL(27, sys_ni_syscall) /* 27 was sys_alarm */
+__SYSCALL(28, sys_ni_syscall) /* 28 was sys_fstat */
+#define __NR_pause 29
+__SYSCALL(__NR_pause, sys_pause)
+__SYSCALL(30, sys_ni_syscall) /* 30 was sys_utime */
+__SYSCALL(31, sys_ni_syscall) /* 31 was sys_stty */
+__SYSCALL(32, sys_ni_syscall) /* 32 was sys_gtty */
+#define __NR_access 33
+__SYSCALL(__NR_access, sys_access)
+#define __NR_nice 34
+__SYSCALL(__NR_nice, sys_nice)
+__SYSCALL(35, sys_ni_syscall) /* 35 was sys_ftime */
+#define __NR_sync 36
+__SYSCALL(__NR_sync, sys_sync)
+#define __NR_kill 37
+__SYSCALL(__NR_kill, sys_kill)
+#define __NR_rename 38
+__SYSCALL(__NR_rename, sys_rename)
+#define __NR_mkdir 39
+__SYSCALL(__NR_mkdir, sys_mkdir)
+#define __NR_rmdir 40
+__SYSCALL(__NR_rmdir, sys_rmdir)
+#define __NR_dup 41
+__SYSCALL(__NR_dup, sys_dup)
+#define __NR_pipe 42
+__SYSCALL(__NR_pipe, sys_pipe)
+#define __NR_times 43
+__SYSCALL(__NR_times, sys_times)
+__SYSCALL(44, sys_ni_syscall) /* 44 was sys_prof */
+#define __NR_brk 45
+__SYSCALL(__NR_brk, sys_brk)
+#define __NR_setgid 46
+__SYSCALL(__NR_setgid, sys_setgid16)
+#define __NR_getgid 47
+__SYSCALL(__NR_getgid, sys_getgid16)
+__SYSCALL(48, sys_ni_syscall) /* 48 was sys_signal */
+#define __NR_geteuid 49
+__SYSCALL(__NR_geteuid, sys_geteuid16)
+#define __NR_getegid 50
+__SYSCALL(__NR_getegid, sys_getegid16)
+#define __NR_acct 51
+__SYSCALL(__NR_acct, sys_acct)
+#define __NR_umount2 52
+__SYSCALL(__NR_umount2, sys_umount)
+__SYSCALL(53, sys_ni_syscall) /* 53 was sys_lock */
+#define __NR_ioctl 54
+__SYSCALL(__NR_ioctl, sys_ioctl)
+#define __NR_fcntl 55
+__SYSCALL(__NR_fcntl, sys_fcntl)
+__SYSCALL(56, sys_ni_syscall) /* 56 was sys_mpx */
+#define __NR_setpgid 57
+__SYSCALL(__NR_setpgid, sys_setpgid)
+__SYSCALL(58, sys_ni_syscall) /* 58 was sys_ulimit */
+__SYSCALL(59, sys_ni_syscall) /* 59 was sys_olduname */
+#define __NR_umask 60
+__SYSCALL(__NR_umask, sys_umask)
+#define __NR_chroot 61
+__SYSCALL(__NR_chroot, sys_chroot)
+#define __NR_ustat 62
+__SYSCALL(__NR_ustat, sys_ustat)
+#define __NR_dup2 63
+__SYSCALL(__NR_dup2, sys_dup2)
+#define __NR_getppid 64
+__SYSCALL(__NR_getppid, sys_getppid)
+#define __NR_getpgrp 65
+__SYSCALL(__NR_getpgrp, sys_getpgrp)
+#define __NR_setsid 66
+__SYSCALL(__NR_setsid, sys_setsid)
+#define __NR_sigaction 67
+__SYSCALL(__NR_sigaction, sys_sigaction)
+__SYSCALL(68, sys_ni_syscall) /* 68 was sys_sgetmask */
+__SYSCALL(69, sys_ni_syscall) /* 69 was sys_ssetmask */
+#define __NR_setreuid 70
+__SYSCALL(__NR_setreuid, sys_setreuid16)
+#define __NR_setregid 71
+__SYSCALL(__NR_setregid, sys_setregid16)
+#define __NR_sigsuspend 72
+__SYSCALL(__NR_sigsuspend, sys_sigsuspend)
+#define __NR_sigpending 73
+__SYSCALL(__NR_sigpending, sys_sigpending)
+#define __NR_sethostname 74
+__SYSCALL(__NR_sethostname, sys_sethostname)
+#define __NR_setrlimit 75
+__SYSCALL(__NR_setrlimit, sys_setrlimit)
+__SYSCALL(76, sys_ni_syscall) /* 76 was sys_getrlimit */
+#define __NR_getrusage 77
+__SYSCALL(__NR_getrusage, sys_getrusage)
+#define __NR_gettimeofday 78
+__SYSCALL(__NR_gettimeofday, sys_gettimeofday)
+#define __NR_settimeofday 79
+__SYSCALL(__NR_settimeofday, sys_settimeofday)
+#define __NR_getgroups 80
+__SYSCALL(__NR_getgroups, sys_getgroups16)
+#define __NR_setgroups 81
+__SYSCALL(__NR_setgroups, sys_setgroups16)
+__SYSCALL(82, sys_ni_syscall) /* 82 was sys_select */
+#define __NR_symlink 83
+__SYSCALL(__NR_symlink, sys_symlink)
+__SYSCALL(84, sys_ni_syscall) /* 84 was sys_lstat */
+#define __NR_readlink 85
+__SYSCALL(__NR_readlink, sys_readlink)
+#define __NR_uselib 86
+__SYSCALL(__NR_uselib, sys_uselib)
+#define __NR_swapon 87
+__SYSCALL(__NR_swapon, sys_swapon)
+#define __NR_reboot 88
+__SYSCALL(__NR_reboot, sys_reboot)
+__SYSCALL(89, sys_ni_syscall) /* 89 was sys_readdir */
+__SYSCALL(90, sys_ni_syscall) /* 90 was sys_mmap */
+#define __NR_munmap 91
+__SYSCALL(__NR_munmap, sys_munmap)
+#define __NR_truncate 92
+__SYSCALL(__NR_truncate, sys_truncate)
+#define __NR_ftruncate 93
+__SYSCALL(__NR_ftruncate, sys_ftruncate)
+#define __NR_fchmod 94
+__SYSCALL(__NR_fchmod, sys_fchmod)
+#define __NR_fchown 95
+__SYSCALL(__NR_fchown, sys_fchown16)
+#define __NR_getpriority 96
+__SYSCALL(__NR_getpriority, sys_getpriority)
+#define __NR_setpriority 97
+__SYSCALL(__NR_setpriority, sys_setpriority)
+__SYSCALL(98, sys_ni_syscall) /* 98 was sys_profil */
+#define __NR_statfs 99
+__SYSCALL(__NR_statfs, sys_statfs)
+#define __NR_fstatfs 100
+__SYSCALL(__NR_fstatfs, sys_fstatfs)
+__SYSCALL(101, sys_ni_syscall) /* 101 was sys_ioperm */
+__SYSCALL(102, sys_ni_syscall) /* 102 was sys_socketcall */
+#define __NR_syslog 103
+__SYSCALL(__NR_syslog, sys_syslog)
+#define __NR_setitimer 104
+__SYSCALL(__NR_setitimer, sys_setitimer)
+#define __NR_getitimer 105
+__SYSCALL(__NR_getitimer, sys_getitimer)
+#define __NR_stat 106
+__SYSCALL(__NR_stat, sys_newstat)
+#define __NR_lstat 107
+__SYSCALL(__NR_lstat, sys_newlstat)
+#define __NR_fstat 108
+__SYSCALL(__NR_fstat, sys_newfstat)
+__SYSCALL(109, sys_ni_syscall) /* 109 was sys_uname */
+__SYSCALL(110, sys_ni_syscall) /* 110 was sys_iopl */
+#define __NR_vhangup 111
+__SYSCALL(__NR_vhangup, sys_vhangup)
+__SYSCALL(112, sys_ni_syscall) /* 112 was sys_idle */
+__SYSCALL(113, sys_ni_syscall) /* 113 was sys_syscall */
+#define __NR_wait4 114
+__SYSCALL(__NR_wait4, sys_wait4)
+#define __NR_swapoff 115
+__SYSCALL(__NR_swapoff, sys_swapoff)
+#define __NR_sysinfo 116
+__SYSCALL(__NR_sysinfo, sys_sysinfo)
+__SYSCALL(117, sys_ni_syscall) /* 117 was sys_ipc */
+#define __NR_fsync 118
+__SYSCALL(__NR_fsync, sys_fsync)
+#define __NR_sigreturn 119
+__SYSCALL(__NR_sigreturn, sys_sigreturn)
+#define __NR_clone 120
+__SYSCALL(__NR_clone, sys_clone)
+#define __NR_setdomainname 121
+__SYSCALL(__NR_setdomainname, sys_setdomainname)
+#define __NR_uname 122
+__SYSCALL(__NR_uname, sys_newuname)
+__SYSCALL(123, sys_ni_syscall) /* 123 was sys_modify_ldt */
+#define __NR_adjtimex 124
+__SYSCALL(__NR_adjtimex, sys_adjtimex)
+#define __NR_mprotect 125
+__SYSCALL(__NR_mprotect, sys_mprotect)
+#define __NR_sigprocmask 126
+__SYSCALL(__NR_sigprocmask, sys_sigprocmask)
+__SYSCALL(127, sys_ni_syscall) /* 127 was sys_create_module */
+#define __NR_init_module 128
+__SYSCALL(__NR_init_module, sys_init_module)
+#define __NR_delete_module 129
+__SYSCALL(__NR_delete_module, sys_delete_module)
+__SYSCALL(130, sys_ni_syscall) /* 130 was sys_get_kernel_syms */
+#define __NR_quotactl 131
+__SYSCALL(__NR_quotactl, sys_quotactl)
+#define __NR_getpgid 132
+__SYSCALL(__NR_getpgid, sys_getpgid)
+#define __NR_fchdir 133
+__SYSCALL(__NR_fchdir, sys_fchdir)
+#define __NR_bdflush 134
+__SYSCALL(__NR_bdflush, sys_bdflush)
+#define __NR_sysfs 135
+__SYSCALL(__NR_sysfs, sys_sysfs)
+#define __NR_personality 136
+__SYSCALL(__NR_personality, sys_personality)
+__SYSCALL(137, sys_ni_syscall) /* 137 was sys_afs_syscall */
+#define __NR_setfsuid 138
+__SYSCALL(__NR_setfsuid, sys_setfsuid16)
+#define __NR_setfsgid 139
+__SYSCALL(__NR_setfsgid, sys_setfsgid16)
+#define __NR__llseek 140
+__SYSCALL(__NR__llseek, sys_llseek)
+#define __NR_getdents 141
+__SYSCALL(__NR_getdents, sys_getdents)
+#define __NR__newselect 142
+__SYSCALL(__NR__newselect, sys_select)
+#define __NR_flock 143
+__SYSCALL(__NR_flock, sys_flock)
+#define __NR_msync 144
+__SYSCALL(__NR_msync, sys_msync)
+#define __NR_readv 145
+__SYSCALL(__NR_readv, sys_readv)
+#define __NR_writev 146
+__SYSCALL(__NR_writev, sys_writev)
+#define __NR_getsid 147
+__SYSCALL(__NR_getsid, sys_getsid)
+#define __NR_fdatasync 148
+__SYSCALL(__NR_fdatasync, sys_fdatasync)
+#define __NR__sysctl 149
+__SYSCALL(__NR__sysctl, sys_sysctl)
+#define __NR_mlock 150
+__SYSCALL(__NR_mlock, sys_mlock)
+#define __NR_munlock 151
+__SYSCALL(__NR_munlock, sys_munlock)
+#define __NR_mlockall 152
+__SYSCALL(__NR_mlockall, sys_mlockall)
+#define __NR_munlockall 153
+__SYSCALL(__NR_munlockall, sys_munlockall)
+#define __NR_sched_setparam 154
+__SYSCALL(__NR_sched_setparam, sys_sched_setparam)
+#define __NR_sched_getparam 155
+__SYSCALL(__NR_sched_getparam, sys_sched_getparam)
+#define __NR_sched_setscheduler 156
+__SYSCALL(__NR_sched_setscheduler, sys_sched_setscheduler)
+#define __NR_sched_getscheduler 157
+__SYSCALL(__NR_sched_getscheduler, sys_sched_getscheduler)
+#define __NR_sched_yield 158
+__SYSCALL(__NR_sched_yield, sys_sched_yield)
+#define __NR_sched_get_priority_max 159
+__SYSCALL(__NR_sched_get_priority_max, sys_sched_get_priority_max)
+#define __NR_sched_get_priority_min 160
+__SYSCALL(__NR_sched_get_priority_min, sys_sched_get_priority_min)
+#define __NR_sched_rr_get_interval 161
+__SYSCALL(__NR_sched_rr_get_interval, sys_sched_rr_get_interval)
+#define __NR_nanosleep 162
+__SYSCALL(__NR_nanosleep, sys_nanosleep)
+#define __NR_mremap 163
+__SYSCALL(__NR_mremap, sys_mremap)
+#define __NR_setresuid 164
+__SYSCALL(__NR_setresuid, sys_setresuid16)
+#define __NR_getresuid 165
+__SYSCALL(__NR_getresuid, sys_getresuid16)
+__SYSCALL(166, sys_ni_syscall) /* 166 was sys_vm86 */
+__SYSCALL(167, sys_ni_syscall) /* 167 was sys_query_module */
+#define __NR_poll 168
+__SYSCALL(__NR_poll, sys_poll)
+#define __NR_nfsservctl 169
+__SYSCALL(__NR_nfsservctl, sys_ni_syscall)
+#define __NR_setresgid 170
+__SYSCALL(__NR_setresgid, sys_setresgid16)
+#define __NR_getresgid 171
+__SYSCALL(__NR_getresgid, sys_getresgid16)
+#define __NR_prctl 172
+__SYSCALL(__NR_prctl, sys_prctl)
+#define __NR_rt_sigreturn 173
+__SYSCALL(__NR_rt_sigreturn, sys_rt_sigreturn)
+#define __NR_rt_sigaction 174
+__SYSCALL(__NR_rt_sigaction, sys_rt_sigaction)
+#define __NR_rt_sigprocmask 175
+__SYSCALL(__NR_rt_sigprocmask, sys_rt_sigprocmask)
+#define __NR_rt_sigpending 176
+__SYSCALL(__NR_rt_sigpending, sys_rt_sigpending)
+#define __NR_rt_sigtimedwait 177
+__SYSCALL(__NR_rt_sigtimedwait, sys_rt_sigtimedwait)
+#define __NR_rt_sigqueueinfo 178
+__SYSCALL(__NR_rt_sigqueueinfo, sys_rt_sigqueueinfo)
+#define __NR_rt_sigsuspend 179
+__SYSCALL(__NR_rt_sigsuspend, sys_rt_sigsuspend)
+#define __NR_pread64 180
+__SYSCALL(__NR_pread64, sys_pread64)
+#define __NR_pwrite64 181
+__SYSCALL(__NR_pwrite64, sys_pwrite64)
+#define __NR_chown 182
+__SYSCALL(__NR_chown, sys_chown16)
+#define __NR_getcwd 183
+__SYSCALL(__NR_getcwd, sys_getcwd)
+#define __NR_capget 184
+__SYSCALL(__NR_capget, sys_capget)
+#define __NR_capset 185
+__SYSCALL(__NR_capset, sys_capset)
+#define __NR_sigaltstack 186
+__SYSCALL(__NR_sigaltstack, sys_sigaltstack)
+#define __NR_sendfile 187
+__SYSCALL(__NR_sendfile, sys_sendfile)
+__SYSCALL(188, sys_ni_syscall) /* 188 reserved */
+__SYSCALL(189, sys_ni_syscall) /* 189 reserved */
+#define __NR_vfork 190
+__SYSCALL(__NR_vfork, sys_vfork)
+#define __NR_ugetrlimit 191 /* SuS compliant getrlimit */
+__SYSCALL(__NR_ugetrlimit, sys_getrlimit)
+#define __NR_mmap2 192
+__SYSCALL(__NR_mmap2, sys_mmap2)
+#define __NR_truncate64 193
+__SYSCALL(__NR_truncate64, sys_truncate64)
+#define __NR_ftruncate64 194
+__SYSCALL(__NR_ftruncate64, sys_ftruncate64)
+#define __NR_stat64 195
+__SYSCALL(__NR_stat64, sys_stat64)
+#define __NR_lstat64 196
+__SYSCALL(__NR_lstat64, sys_lstat64)
+#define __NR_fstat64 197
+__SYSCALL(__NR_fstat64, sys_fstat64)
+#define __NR_lchown32 198
+__SYSCALL(__NR_lchown32, sys_lchown)
+#define __NR_getuid32 199
+__SYSCALL(__NR_getuid32, sys_getuid)
+#define __NR_getgid32 200
+__SYSCALL(__NR_getgid32, sys_getgid)
+#define __NR_geteuid32 201
+__SYSCALL(__NR_geteuid32, sys_geteuid)
+#define __NR_getegid32 202
+__SYSCALL(__NR_getegid32, sys_getegid)
+#define __NR_setreuid32 203
+__SYSCALL(__NR_setreuid32, sys_setreuid)
+#define __NR_setregid32 204
+__SYSCALL(__NR_setregid32, sys_setregid)
+#define __NR_getgroups32 205
+__SYSCALL(__NR_getgroups32, sys_getgroups)
+#define __NR_setgroups32 206
+__SYSCALL(__NR_setgroups32, sys_setgroups)
+#define __NR_fchown32 207
+__SYSCALL(__NR_fchown32, sys_fchown)
+#define __NR_setresuid32 208
+__SYSCALL(__NR_setresuid32, sys_setresuid)
+#define __NR_getresuid32 209
+__SYSCALL(__NR_getresuid32, sys_getresuid)
+#define __NR_setresgid32 210
+__SYSCALL(__NR_setresgid32, sys_setresgid)
+#define __NR_getresgid32 211
+__SYSCALL(__NR_getresgid32, sys_getresgid)
+#define __NR_chown32 212
+__SYSCALL(__NR_chown32, sys_chown)
+#define __NR_setuid32 213
+__SYSCALL(__NR_setuid32, sys_setuid)
+#define __NR_setgid32 214
+__SYSCALL(__NR_setgid32, sys_setgid)
+#define __NR_setfsuid32 215
+__SYSCALL(__NR_setfsuid32, sys_setfsuid)
+#define __NR_setfsgid32 216
+__SYSCALL(__NR_setfsgid32, sys_setfsgid)
+#define __NR_getdents64 217
+__SYSCALL(__NR_getdents64, sys_getdents64)
+#define __NR_pivot_root 218
+__SYSCALL(__NR_pivot_root, sys_pivot_root)
+#define __NR_mincore 219
+__SYSCALL(__NR_mincore, sys_mincore)
+#define __NR_madvise 220
+__SYSCALL(__NR_madvise, sys_madvise)
+#define __NR_fcntl64 221
+__SYSCALL(__NR_fcntl64, sys_fcntl64)
+__SYSCALL(222, sys_ni_syscall) /* 222 for tux */
+__SYSCALL(223, sys_ni_syscall) /* 223 is unused */
+#define __NR_gettid 224
+__SYSCALL(__NR_gettid, sys_gettid)
+#define __NR_readahead 225
+__SYSCALL(__NR_readahead, sys_readahead)
+#define __NR_setxattr 226
+__SYSCALL(__NR_setxattr, sys_setxattr)
+#define __NR_lsetxattr 227
+__SYSCALL(__NR_lsetxattr, sys_lsetxattr)
+#define __NR_fsetxattr 228
+__SYSCALL(__NR_fsetxattr, sys_fsetxattr)
+#define __NR_getxattr 229
+__SYSCALL(__NR_getxattr, sys_getxattr)
+#define __NR_lgetxattr 230
+__SYSCALL(__NR_lgetxattr, sys_lgetxattr)
+#define __NR_fgetxattr 231
+__SYSCALL(__NR_fgetxattr, sys_fgetxattr)
+#define __NR_listxattr 232
+__SYSCALL(__NR_listxattr, sys_listxattr)
+#define __NR_llistxattr 233
+__SYSCALL(__NR_llistxattr, sys_llistxattr)
+#define __NR_flistxattr 234
+__SYSCALL(__NR_flistxattr, sys_flistxattr)
+#define __NR_removexattr 235
+__SYSCALL(__NR_removexattr, sys_removexattr)
+#define __NR_lremovexattr 236
+__SYSCALL(__NR_lremovexattr, sys_lremovexattr)
+#define __NR_fremovexattr 237
+__SYSCALL(__NR_fremovexattr, sys_fremovexattr)
+#define __NR_tkill 238
+__SYSCALL(__NR_tkill, sys_tkill)
+#define __NR_sendfile64 239
+__SYSCALL(__NR_sendfile64, sys_sendfile64)
+#define __NR_futex 240
+__SYSCALL(__NR_futex, sys_futex)
+#define __NR_sched_setaffinity 241
+__SYSCALL(__NR_sched_setaffinity, sys_sched_setaffinity)
+#define __NR_sched_getaffinity 242
+__SYSCALL(__NR_sched_getaffinity, sys_sched_getaffinity)
+#define __NR_io_setup 243
+__SYSCALL(__NR_io_setup, sys_io_setup)
+#define __NR_io_destroy 244
+__SYSCALL(__NR_io_destroy, sys_io_destroy)
+#define __NR_io_getevents 245
+__SYSCALL(__NR_io_getevents, sys_io_getevents)
+#define __NR_io_submit 246
+__SYSCALL(__NR_io_submit, sys_io_submit)
+#define __NR_io_cancel 247
+__SYSCALL(__NR_io_cancel, sys_io_cancel)
+#define __NR_exit_group 248
+__SYSCALL(__NR_exit_group, sys_exit_group)
+#define __NR_lookup_dcookie 249
+__SYSCALL(__NR_lookup_dcookie, sys_lookup_dcookie)
+#define __NR_epoll_create 250
+__SYSCALL(__NR_epoll_create, sys_epoll_create)
+#define __NR_epoll_ctl 251
+__SYSCALL(__NR_epoll_ctl, sys_epoll_ctl)
+#define __NR_epoll_wait 252
+__SYSCALL(__NR_epoll_wait, sys_epoll_wait)
+#define __NR_remap_file_pages 253
+__SYSCALL(__NR_remap_file_pages, sys_remap_file_pages)
+__SYSCALL(254, sys_ni_syscall) /* 254 for set_thread_area */
+__SYSCALL(255, sys_ni_syscall) /* 255 for get_thread_area */
+#define __NR_set_tid_address 256
+__SYSCALL(__NR_set_tid_address, sys_set_tid_address)
+#define __NR_timer_create 257
+__SYSCALL(__NR_timer_create, sys_timer_create)
+#define __NR_timer_settime 258
+__SYSCALL(__NR_timer_settime, sys_timer_settime)
+#define __NR_timer_gettime 259
+__SYSCALL(__NR_timer_gettime, sys_timer_gettime)
+#define __NR_timer_getoverrun 260
+__SYSCALL(__NR_timer_getoverrun, sys_timer_getoverrun)
+#define __NR_timer_delete 261
+__SYSCALL(__NR_timer_delete, sys_timer_delete)
+#define __NR_clock_settime 262
+__SYSCALL(__NR_clock_settime, sys_clock_settime)
+#define __NR_clock_gettime 263
+__SYSCALL(__NR_clock_gettime, sys_clock_gettime)
+#define __NR_clock_getres 264
+__SYSCALL(__NR_clock_getres, sys_clock_getres)
+#define __NR_clock_nanosleep 265
+__SYSCALL(__NR_clock_nanosleep, sys_clock_nanosleep)
+#define __NR_statfs64 266
+__SYSCALL(__NR_statfs64, sys_statfs64)
+#define __NR_fstatfs64 267
+__SYSCALL(__NR_fstatfs64, sys_fstatfs64)
+#define __NR_tgkill 268
+__SYSCALL(__NR_tgkill, sys_tgkill)
+#define __NR_utimes 269
+__SYSCALL(__NR_utimes, sys_utimes)
+#define __NR_fadvise64 270
+__SYSCALL(__NR_fadvise64, sys_fadvise64_64)
+#define __NR_pciconfig_iobase 271
+__SYSCALL(__NR_pciconfig_iobase, sys_pciconfig_iobase)
+#define __NR_pciconfig_read 272
+__SYSCALL(__NR_pciconfig_read, sys_pciconfig_read)
+#define __NR_pciconfig_write 273
+__SYSCALL(__NR_pciconfig_write, sys_pciconfig_write)
+#define __NR_mq_open 274
+__SYSCALL(__NR_mq_open, sys_mq_open)
+#define __NR_mq_unlink 275
+__SYSCALL(__NR_mq_unlink, sys_mq_unlink)
+#define __NR_mq_timedsend 276
+__SYSCALL(__NR_mq_timedsend, sys_mq_timedsend)
+#define __NR_mq_timedreceive 277
+__SYSCALL(__NR_mq_timedreceive, sys_mq_timedreceive)
+#define __NR_mq_notify 278
+__SYSCALL(__NR_mq_notify, sys_mq_notify)
+#define __NR_mq_getsetattr 279
+__SYSCALL(__NR_mq_getsetattr, sys_mq_getsetattr)
+#define __NR_waitid 280
+__SYSCALL(__NR_waitid, sys_waitid)
+#define __NR_socket 281
+__SYSCALL(__NR_socket, sys_socket)
+#define __NR_bind 282
+__SYSCALL(__NR_bind, sys_bind)
+#define __NR_connect 283
+__SYSCALL(__NR_connect, sys_connect)
+#define __NR_listen 284
+__SYSCALL(__NR_listen, sys_listen)
+#define __NR_accept 285
+__SYSCALL(__NR_accept, sys_accept)
+#define __NR_getsockname 286
+__SYSCALL(__NR_getsockname, sys_getsockname)
+#define __NR_getpeername 287
+__SYSCALL(__NR_getpeername, sys_getpeername)
+#define __NR_socketpair 288
+__SYSCALL(__NR_socketpair, sys_socketpair)
+#define __NR_send 289
+__SYSCALL(__NR_send, sys_send)
+#define __NR_sendto 290
+__SYSCALL(__NR_sendto, sys_sendto)
+#define __NR_recv 291
+__SYSCALL(__NR_recv, sys_recv)
+#define __NR_recvfrom 292
+__SYSCALL(__NR_recvfrom, sys_recvfrom)
+#define __NR_shutdown 293
+__SYSCALL(__NR_shutdown, sys_shutdown)
+#define __NR_setsockopt 294
+__SYSCALL(__NR_setsockopt, sys_setsockopt)
+#define __NR_getsockopt 295
+__SYSCALL(__NR_getsockopt, sys_getsockopt)
+#define __NR_sendmsg 296
+__SYSCALL(__NR_sendmsg, sys_sendmsg)
+#define __NR_recvmsg 297
+__SYSCALL(__NR_recvmsg, sys_recvmsg)
+#define __NR_semop 298
+__SYSCALL(__NR_semop, sys_semop)
+#define __NR_semget 299
+__SYSCALL(__NR_semget, sys_semget)
+#define __NR_semctl 300
+__SYSCALL(__NR_semctl, sys_semctl)
+#define __NR_msgsnd 301
+__SYSCALL(__NR_msgsnd, sys_msgsnd)
+#define __NR_msgrcv 302
+__SYSCALL(__NR_msgrcv, sys_msgrcv)
+#define __NR_msgget 303
+__SYSCALL(__NR_msgget, sys_msgget)
+#define __NR_msgctl 304
+__SYSCALL(__NR_msgctl, sys_msgctl)
+#define __NR_shmat 305
+__SYSCALL(__NR_shmat, sys_shmat)
+#define __NR_shmdt 306
+__SYSCALL(__NR_shmdt, sys_shmdt)
+#define __NR_shmget 307
+__SYSCALL(__NR_shmget, sys_shmget)
+#define __NR_shmctl 308
+__SYSCALL(__NR_shmctl, sys_shmctl)
+#define __NR_add_key 309
+__SYSCALL(__NR_add_key, sys_add_key)
+#define __NR_request_key 310
+__SYSCALL(__NR_request_key, sys_request_key)
+#define __NR_keyctl 311
+__SYSCALL(__NR_keyctl, sys_keyctl)
+#define __NR_semtimedop 312
+__SYSCALL(__NR_semtimedop, sys_semtimedop)
+#define __NR_vserver 313
+__SYSCALL(__NR_vserver, sys_ni_syscall)
+#define __NR_ioprio_set 314
+__SYSCALL(__NR_ioprio_set, sys_ioprio_set)
+#define __NR_ioprio_get 315
+__SYSCALL(__NR_ioprio_get, sys_ioprio_get)
+#define __NR_inotify_init 316
+__SYSCALL(__NR_inotify_init, sys_inotify_init)
+#define __NR_inotify_add_watch 317
+__SYSCALL(__NR_inotify_add_watch, sys_inotify_add_watch)
+#define __NR_inotify_rm_watch 318
+__SYSCALL(__NR_inotify_rm_watch, sys_inotify_rm_watch)
+#define __NR_mbind 319
+__SYSCALL(__NR_mbind, sys_mbind)
+#define __NR_get_mempolicy 320
+__SYSCALL(__NR_get_mempolicy, sys_get_mempolicy)
+#define __NR_set_mempolicy 321
+__SYSCALL(__NR_set_mempolicy, sys_set_mempolicy)
+#define __NR_openat 322
+__SYSCALL(__NR_openat, sys_openat)
+#define __NR_mkdirat 323
+__SYSCALL(__NR_mkdirat, sys_mkdirat)
+#define __NR_mknodat 324
+__SYSCALL(__NR_mknodat, sys_mknodat)
+#define __NR_fchownat 325
+__SYSCALL(__NR_fchownat, sys_fchownat)
+#define __NR_futimesat 326
+__SYSCALL(__NR_futimesat, sys_futimesat)
+#define __NR_fstatat64 327
+__SYSCALL(__NR_fstatat64, sys_fstatat64)
+#define __NR_unlinkat 328
+__SYSCALL(__NR_unlinkat, sys_unlinkat)
+#define __NR_renameat 329
+__SYSCALL(__NR_renameat, sys_renameat)
+#define __NR_linkat 330
+__SYSCALL(__NR_linkat, sys_linkat)
+#define __NR_symlinkat 331
+__SYSCALL(__NR_symlinkat, sys_symlinkat)
+#define __NR_readlinkat 332
+__SYSCALL(__NR_readlinkat, sys_readlinkat)
+#define __NR_fchmodat 333
+__SYSCALL(__NR_fchmodat, sys_fchmodat)
+#define __NR_faccessat 334
+__SYSCALL(__NR_faccessat, sys_faccessat)
+#define __NR_pselect6 335
+__SYSCALL(__NR_pselect6, sys_pselect6)
+#define __NR_ppoll 336
+__SYSCALL(__NR_ppoll, sys_ppoll)
+#define __NR_unshare 337
+__SYSCALL(__NR_unshare, sys_unshare)
+#define __NR_set_robust_list 338
+__SYSCALL(__NR_set_robust_list, sys_set_robust_list)
+#define __NR_get_robust_list 339
+__SYSCALL(__NR_get_robust_list, sys_get_robust_list)
+#define __NR_splice 340
+__SYSCALL(__NR_splice, sys_splice)
+#define __NR_sync_file_range2 341
+__SYSCALL(__NR_sync_file_range2, sys_sync_file_range2)
+#define __NR_tee 342
+__SYSCALL(__NR_tee, sys_tee)
+#define __NR_vmsplice 343
+__SYSCALL(__NR_vmsplice, sys_vmsplice)
+#define __NR_move_pages 344
+__SYSCALL(__NR_move_pages, sys_move_pages)
+#define __NR_getcpu 345
+__SYSCALL(__NR_getcpu, sys_getcpu)
+#define __NR_epoll_pwait 346
+__SYSCALL(__NR_epoll_pwait, sys_epoll_pwait)
+#define __NR_kexec_load 347
+__SYSCALL(__NR_kexec_load, sys_kexec_load)
+#define __NR_utimensat 348
+__SYSCALL(__NR_utimensat, sys_utimensat)
+#define __NR_signalfd 349
+__SYSCALL(__NR_signalfd, sys_signalfd)
+#define __NR_timerfd_create 350
+__SYSCALL(__NR_timerfd_create, sys_timerfd_create)
+#define __NR_eventfd 351
+__SYSCALL(__NR_eventfd, sys_eventfd)
+#define __NR_fallocate 352
+__SYSCALL(__NR_fallocate, sys_fallocate)
+#define __NR_timerfd_settime 353
+__SYSCALL(__NR_timerfd_settime, sys_timerfd_settime)
+#define __NR_timerfd_gettime 354
+__SYSCALL(__NR_timerfd_gettime, sys_timerfd_gettime)
+#define __NR_signalfd4 355
+__SYSCALL(__NR_signalfd4, sys_signalfd4)
+#define __NR_eventfd2 356
+__SYSCALL(__NR_eventfd2, sys_eventfd2)
+#define __NR_epoll_create1 357
+__SYSCALL(__NR_epoll_create1, sys_epoll_create1)
+#define __NR_dup3 358
+__SYSCALL(__NR_dup3, sys_dup3)
+#define __NR_pipe2 359
+__SYSCALL(__NR_pipe2, sys_pipe2)
+#define __NR_inotify_init1 360
+__SYSCALL(__NR_inotify_init1, sys_inotify_init1)
+#define __NR_preadv 361
+__SYSCALL(__NR_preadv, sys_preadv)
+#define __NR_pwritev 362
+__SYSCALL(__NR_pwritev, sys_pwritev)
+#define __NR_rt_tgsigqueueinfo 363
+__SYSCALL(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo)
+#define __NR_perf_event_open 364
+__SYSCALL(__NR_perf_event_open, sys_perf_event_open)
+#define __NR_recvmmsg 365
+__SYSCALL(__NR_recvmmsg, sys_recvmmsg)
+#define __NR_accept4 366
+__SYSCALL(__NR_accept4, sys_accept4)
+#define __NR_fanotify_init 367
+__SYSCALL(__NR_fanotify_init, sys_fanotify_init)
+#define __NR_fanotify_mark 368
+__SYSCALL(__NR_fanotify_mark, sys_fanotify_mark)
+#define __NR_prlimit64 369
+__SYSCALL(__NR_prlimit64, sys_prlimit64)
+#define __NR_name_to_handle_at 370
+__SYSCALL(__NR_name_to_handle_at, sys_name_to_handle_at)
+#define __NR_open_by_handle_at 371
+__SYSCALL(__NR_open_by_handle_at, sys_open_by_handle_at)
+#define __NR_clock_adjtime 372
+__SYSCALL(__NR_clock_adjtime, sys_clock_adjtime)
+#define __NR_syncfs 373
+__SYSCALL(__NR_syncfs, sys_syncfs)
+
+/*
+ * The following SVCs are ARM private.
+ */
+#define __ARM_NR_COMPAT_BASE 0x0f0000
+#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE+2)
+#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE+5)
+
+#endif /* __SYSCALL_COMPAT */
+
+#define __NR_compat_syscalls 374
+
+#define __ARCH_WANT_COMPAT_IPC_PARSE_VERSION
+#define __ARCH_WANT_COMPAT_STAT64
+#define __ARCH_WANT_SYS_GETHOSTNAME
+#define __ARCH_WANT_SYS_PAUSE
+#define __ARCH_WANT_SYS_GETPGRP
+#define __ARCH_WANT_SYS_LLSEEK
+#define __ARCH_WANT_SYS_NICE
+#define __ARCH_WANT_SYS_SIGPENDING
+#define __ARCH_WANT_SYS_SIGPROCMASK
+#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
+
+#endif /* __ASM_UNISTD32_H */
diff --git a/arch/arm64/kernel/kuser32.S b/arch/arm64/kernel/kuser32.S
new file mode 100644
index 0000000..7557737
--- /dev/null
+++ b/arch/arm64/kernel/kuser32.S
@@ -0,0 +1,77 @@
+/*
+ * Low-level user helpers placed in the vectors page for AArch32.
+ * Based on the kuser helpers in arch/arm/kernel/entry-armv.S.
+ *
+ * Copyright (C) 2005-2011 Nicolas Pitre <nico@xxxxxxx>
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * AArch32 user helpers.
+ *
+ * Each segment is 32-byte aligned and will be moved to the top of the high
+ * vector page. New segments (if ever needed) must be added in front of
+ * existing ones. This mechanism should be used only for things that are
+ * really small and justified, and not be abused freely.
+ *
+ * See Documentation/arm/kernel_user_helpers.txt for formal definitions.
+ */
+ .align 5
+ .globl __kuser_helper_start
+__kuser_helper_start:
+
+__kuser_cmpxchg64: // 0xffff0f60
+ .inst 0xe92d00f0 // push {r4, r5, r6, r7}
+ .inst 0xe1c040d0 // ldrd r4, r5, [r0]
+ .inst 0xe1c160d0 // ldrd r6, r7, [r1]
+ .inst 0xf57ff05f // dmb sy
+ .inst 0xe1b20f9f // 1: ldrexd r0, r1, [r2]
+ .inst 0xe0303004 // eors r3, r0, r4
+ .inst 0x00313005 // eoreqs r3, r1, r5
+ .inst 0x01a23f96 // strexdeq r3, r6, [r2]
+ .inst 0x03330001 // teqeq r3, #1
+ .inst 0x0afffff9 // beq 1b
+ .inst 0xf57ff05f // dmb sy
+ .inst 0xe2730000 // rsbs r0, r3, #0
+ .inst 0xe8bd00f0 // pop {r4, r5, r6, r7}
+ .inst 0xe12fff1e // bx lr
+
+ .align 5
+__kuser_memory_barrier: // 0xffff0fa0
+ .inst 0xf57ff05f // dmb sy
+ .inst 0xe12fff1e // bx lr
+
+ .align 5
+__kuser_cmpxchg: // 0xffff0fc0
+ .inst 0xf57ff05f // dmb sy
+ .inst 0xe1923f9f // 1: ldrex r3, [r2]
+ .inst 0xe0533000 // subs r3, r3, r0
+ .inst 0x01823f91 // strexeq r3, r1, [r2]
+ .inst 0x03330001 // teqeq r3, #1
+ .inst 0x0afffffa // beq 1b
+ .inst 0xe2730000 // rsbs r0, r3, #0
+ .inst 0xeaffffef // b <__kuser_memory_barrier>
+
+ .align 5
+__kuser_get_tls: // 0xffff0fe0
+ .inst 0xee1d0f70 // mrc p15, 0, r0, c13, c0, 3
+ .inst 0xe12fff1e // bx lr
+ .rep 5
+ .word 0
+ .endr
+
+__kuser_helper_version: // 0xffff0ffc
+ .word ((__kuser_helper_end - __kuser_helper_start) >> 5)
+ .globl __kuser_helper_end
+__kuser_helper_end:
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
new file mode 100644
index 0000000..ac74c2f
--- /dev/null
+++ b/arch/arm64/kernel/signal32.c
@@ -0,0 +1,876 @@
+/*
+ * Based on arch/arm/kernel/signal.c
+ *
+ * Copyright (C) 1995-2009 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ * Modified by Will Deacon <will.deacon@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define __SYSCALL_COMPAT
+
+#include <linux/compat.h>
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+#include <linux/ratelimit.h>
+
+#include <asm/fpsimd.h>
+#include <asm/signal32.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+
+typedef struct compat_siginfo {
+ int si_signo;
+ int si_errno;
+ int si_code;
+
+ union {
+ /* The padding is the same size as AArch64. */
+ int _pad[SI_PAD_SIZE];
+
+ /* kill() */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ __compat_uid32_t _uid; /* sender's uid */
+ } _kill;
+
+ /* POSIX.1b timers */
+ struct {
+ compat_timer_t _tid; /* timer id */
+ int _overrun; /* overrun count */
+ compat_sigval_t _sigval; /* same as below */
+ int _sys_private; /* not to be passed to user */
+ } _timer;
+
+ /* POSIX.1b signals */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ __compat_uid32_t _uid; /* sender's uid */
+ compat_sigval_t _sigval;
+ } _rt;
+
+ /* SIGCHLD */
+ struct {
+ compat_pid_t _pid; /* which child */
+ __compat_uid32_t _uid; /* sender's uid */
+ int _status; /* exit code */
+ compat_clock_t _utime;
+ compat_clock_t _stime;
+ } _sigchld;
+
+ /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+ struct {
+ compat_uptr_t _addr; /* faulting insn/memory ref. */
+ short _addr_lsb; /* LSB of the reported address */
+ } _sigfault;
+
+ /* SIGPOLL */
+ struct {
+ compat_long_t _band; /* POLL_IN, POLL_OUT, POLL_MSG */
+ int _fd;
+ } _sigpoll;
+ } _sifields;
+} compat_siginfo_t;
+
+struct compat_sigaction {
+ compat_uptr_t sa_handler;
+ compat_ulong_t sa_flags;
+ compat_uptr_t sa_restorer;
+ compat_sigset_t sa_mask;
+};
+
+struct compat_old_sigaction {
+ compat_uptr_t sa_handler;
+ compat_old_sigset_t sa_mask;
+ compat_ulong_t sa_flags;
+ compat_uptr_t sa_restorer;
+};
+
+typedef struct compat_sigaltstack {
+ compat_uptr_t ss_sp;
+ int ss_flags;
+ compat_size_t ss_size;
+} compat_stack_t;
+
+struct compat_sigcontext {
+ /* We always set these two fields to 0 */
+ compat_ulong_t trap_no;
+ compat_ulong_t error_code;
+
+ compat_ulong_t oldmask;
+ compat_ulong_t arm_r0;
+ compat_ulong_t arm_r1;
+ compat_ulong_t arm_r2;
+ compat_ulong_t arm_r3;
+ compat_ulong_t arm_r4;
+ compat_ulong_t arm_r5;
+ compat_ulong_t arm_r6;
+ compat_ulong_t arm_r7;
+ compat_ulong_t arm_r8;
+ compat_ulong_t arm_r9;
+ compat_ulong_t arm_r10;
+ compat_ulong_t arm_fp;
+ compat_ulong_t arm_ip;
+ compat_ulong_t arm_sp;
+ compat_ulong_t arm_lr;
+ compat_ulong_t arm_pc;
+ compat_ulong_t arm_cpsr;
+ compat_ulong_t fault_address;
+};
+
+struct compat_ucontext {
+ compat_ulong_t uc_flags;
+ struct compat_ucontext *uc_link;
+ compat_stack_t uc_stack;
+ struct compat_sigcontext uc_mcontext;
+ compat_sigset_t uc_sigmask;
+ int __unused[32 - (sizeof (compat_sigset_t) / sizeof (int))];
+ compat_ulong_t uc_regspace[128] __attribute__((__aligned__(8)));
+};
+
+struct compat_vfp_sigframe {
+ compat_ulong_t magic;
+ compat_ulong_t size;
+ struct compat_user_vfp {
+ compat_u64 fpregs[32];
+ compat_ulong_t fpscr;
+ } ufp;
+ struct compat_user_vfp_exc {
+ compat_ulong_t fpexc;
+ compat_ulong_t fpinst;
+ compat_ulong_t fpinst2;
+ } ufp_exc;
+} __attribute__((__aligned__(8)));
+
+#define VFP_MAGIC 0x56465001
+#define VFP_STORAGE_SIZE sizeof(struct compat_vfp_sigframe)
+
+struct compat_aux_sigframe {
+ struct compat_vfp_sigframe vfp;
+
+ /* Something that isn't a valid magic number for any coprocessor. */
+ unsigned long end_magic;
+} __attribute__((__aligned__(8)));
+
+struct compat_sigframe {
+ struct compat_ucontext uc;
+ compat_ulong_t retcode[2];
+};
+
+struct compat_rt_sigframe {
+ struct compat_siginfo info;
+ struct compat_sigframe sig;
+};
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+/*
+ * For ARM syscalls, the syscall number has to be loaded into r7.
+ * We do not support an OABI userspace.
+ */
+#define MOV_R7_NR_SIGRETURN (0xe3a07000 | __NR_sigreturn)
+#define SVC_SYS_SIGRETURN (0xef000000 | __NR_sigreturn)
+#define MOV_R7_NR_RT_SIGRETURN (0xe3a07000 | __NR_rt_sigreturn)
+#define SVC_SYS_RT_SIGRETURN (0xef000000 | __NR_rt_sigreturn)
+
+/*
+ * For Thumb syscalls, we also pass the syscall number via r7. We therefore
+ * need two 16-bit instructions.
+ */
+#define SVC_THUMB_SIGRETURN (((0xdf00 | __NR_sigreturn) << 16) | \
+ 0x2700 | __NR_sigreturn)
+#define SVC_THUMB_RT_SIGRETURN (((0xdf00 | __NR_rt_sigreturn) << 16) | \
+ 0x2700 | __NR_rt_sigreturn)
+
+const compat_ulong_t aarch32_sigret_code[6] = {
+ /*
+ * AArch32 sigreturn code.
+ * We don't construct an OABI SWI - instead we just set the imm24 field
+ * to the EABI syscall number so that we create a sane disassembly.
+ */
+ MOV_R7_NR_SIGRETURN, SVC_SYS_SIGRETURN, SVC_THUMB_SIGRETURN,
+ MOV_R7_NR_RT_SIGRETURN, SVC_SYS_RT_SIGRETURN, SVC_THUMB_RT_SIGRETURN,
+};
+
+static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
+{
+ compat_sigset_t cset;
+
+ cset.sig[0] = set->sig[0] & 0xffffffffull;
+ cset.sig[1] = set->sig[0] >> 32;
+
+ return copy_to_user(uset, &cset, sizeof(*uset));
+}
+
+static inline int get_sigset_t(sigset_t *set,
+ const compat_sigset_t __user *uset)
+{
+ compat_sigset_t s32;
+
+ if (copy_from_user(&s32, uset, sizeof(*uset)))
+ return -EFAULT;
+
+ set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
+ return 0;
+}
+
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
+{
+ int err;
+
+ if (!access_ok(VERIFY_WRITE, to, sizeof(*to)))
+ return -EFAULT;
+
+ /* If you change siginfo_t structure, please be sure
+ * this code is fixed accordingly.
+ * It should never copy any pad contained in the structure
+ * to avoid security leaks, but must copy the generic
+ * 3 ints plus the relevant union member.
+ * This routine must convert siginfo from 64bit to 32bit as well
+ * at the same time.
+ */
+ err = __put_user(from->si_signo, &to->si_signo);
+ err |= __put_user(from->si_errno, &to->si_errno);
+ err |= __put_user((short)from->si_code, &to->si_code);
+ if (from->si_code < 0)
+ err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad,
+ SI_PAD_SIZE);
+ else switch (from->si_code & __SI_MASK) {
+ case __SI_KILL:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ break;
+ case __SI_TIMER:
+ err |= __put_user(from->si_tid, &to->si_tid);
+ err |= __put_user(from->si_overrun, &to->si_overrun);
+ err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr,
+ &to->si_ptr);
+ break;
+ case __SI_POLL:
+ err |= __put_user(from->si_band, &to->si_band);
+ err |= __put_user(from->si_fd, &to->si_fd);
+ break;
+ case __SI_FAULT:
+ err |= __put_user((compat_uptr_t)(unsigned long)from->si_addr,
+ &to->si_addr);
+#ifdef BUS_MCEERR_AO
+ /*
+ * Other callers might not initialize the si_lsb field,
+ * so check explicitely for the right codes here.
+ */
+ if (from->si_code == BUS_MCEERR_AR || from->si_code == BUS_MCEERR_AO)
+ err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb);
+#endif
+ break;
+ case __SI_CHLD:
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user(from->si_status, &to->si_status);
+ err |= __put_user(from->si_utime, &to->si_utime);
+ err |= __put_user(from->si_stime, &to->si_stime);
+ break;
+ case __SI_RT: /* This is not generated by the kernel as of now. */
+ case __SI_MESGQ: /* But this is */
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ err |= __put_user((compat_uptr_t)(unsigned long)from->si_ptr, &to->si_ptr);
+ break;
+ default: /* this is just in case for now ... */
+ err |= __put_user(from->si_pid, &to->si_pid);
+ err |= __put_user(from->si_uid, &to->si_uid);
+ break;
+ }
+ return err;
+}
+
+int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
+{
+ memset(to, 0, sizeof *to);
+
+ if (copy_from_user(to, from, __ARCH_SI_PREAMBLE_SIZE) ||
+ copy_from_user(to->_sifields._pad,
+ from->_sifields._pad, SI_PAD_SIZE))
+ return -EFAULT;
+
+ return 0;
+}
+
+/*
+ * VFP save/restore code.
+ */
+static int compat_preserve_vfp_context(struct compat_vfp_sigframe __user *frame)
+{
+ struct fpsimd_state *fpsimd = &current->thread.fpsimd_state;
+ compat_ulong_t magic = VFP_MAGIC;
+ compat_ulong_t size = VFP_STORAGE_SIZE;
+ compat_ulong_t fpscr, fpexc;
+ int err = 0;
+
+ /*
+ * Save the hardware registers to the fpsimd_state structure.
+ * Note that this also saves V16-31, which aren't visible
+ * in AArch32.
+ */
+ fpsimd_save_state(fpsimd);
+
+ /* Place structure header on the stack */
+ __put_user_error(magic, &frame->magic, err);
+ __put_user_error(size, &frame->size, err);
+
+ /*
+ * Now copy the FP registers. Since the registers are packed,
+ * we can copy the prefix we want (V0-V15) as it is.
+ * FIXME: Won't work if big endian.
+ */
+ err |= __copy_to_user(&frame->ufp.fpregs, fpsimd->vregs,
+ sizeof(frame->ufp.fpregs));
+
+ /* Create an AArch32 fpscr from the fpsr and the fpcr. */
+ fpscr = (fpsimd->fpsr & VFP_FPSCR_STAT_MASK) |
+ (fpsimd->fpcr & VFP_FPSCR_CTRL_MASK);
+ __put_user_error(fpscr, &frame->ufp.fpscr, err);
+
+ /*
+ * The exception register aren't available so we fake up a
+ * basic FPEXC and zero everything else.
+ */
+ fpexc = (1 << 30);
+ __put_user_error(fpexc, &frame->ufp_exc.fpexc, err);
+ __put_user_error(0, &frame->ufp_exc.fpinst, err);
+ __put_user_error(0, &frame->ufp_exc.fpinst2, err);
+
+ return err ? -EFAULT : 0;
+}
+
+static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame)
+{
+ struct fpsimd_state fpsimd;
+ compat_ulong_t magic = VFP_MAGIC;
+ compat_ulong_t size = VFP_STORAGE_SIZE;
+ compat_ulong_t fpscr;
+ int err = 0;
+
+ __get_user_error(magic, &frame->magic, err);
+ __get_user_error(size, &frame->size, err);
+
+ if (err)
+ return -EFAULT;
+ if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE)
+ return -EINVAL;
+
+ /*
+ * Copy the FP registers into the start of the fpsimd_state.
+ * FIXME: Won't work if big endian.
+ */
+ err |= __copy_from_user(fpsimd.vregs, frame->ufp.fpregs,
+ sizeof(frame->ufp.fpregs));
+
+ /* Extract the fpsr and the fpcr from the fpscr */
+ __get_user_error(fpscr, &frame->ufp.fpscr, err);
+ fpsimd.fpsr = fpscr & VFP_FPSCR_STAT_MASK;
+ fpsimd.fpcr = fpscr & VFP_FPSCR_CTRL_MASK;
+
+ /*
+ * We don't need to touch the exception register, so
+ * reload the hardware state.
+ */
+ if (!err) {
+ preempt_disable();
+ fpsimd_load_state(&fpsimd);
+ preempt_enable();
+ }
+
+ return err ? -EFAULT : 0;
+}
+
+/*
+ * atomically swap in the new signal mask, and wait for a signal.
+ */
+asmlinkage int compat_sys_sigsuspend(int restart, compat_ulong_t oldmask,
+ compat_old_sigset_t mask)
+{
+ sigset_t blocked;
+
+ siginitset(&current->blocked, mask);
+ return sigsuspend(&blocked);
+}
+
+asmlinkage int compat_sys_sigaction(int sig,
+ const struct compat_old_sigaction __user *act,
+ struct compat_old_sigaction __user *oact)
+{
+ struct k_sigaction new_ka, old_ka;
+ int ret;
+ compat_old_sigset_t mask;
+ compat_uptr_t handler, restorer;
+
+ if (act) {
+ if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+ __get_user(handler, &act->sa_handler) ||
+ __get_user(restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
+ return -EFAULT;
+
+ new_ka.sa.sa_handler = compat_ptr(handler);
+ new_ka.sa.sa_restorer = compat_ptr(restorer);
+ siginitset(&new_ka.sa.sa_mask, mask);
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+ if (!ret && oact) {
+ if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+ __put_user(ptr_to_compat(old_ka.sa.sa_handler),
+ &oact->sa_handler) ||
+ __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
+ &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
+ return -EFAULT;
+ }
+
+ return ret;
+}
+
+asmlinkage int compat_sys_rt_sigaction(int sig,
+ const struct compat_sigaction __user *act,
+ struct compat_sigaction __user *oact,
+ compat_size_t sigsetsize)
+{
+ struct k_sigaction new_ka, old_ka;
+ int ret;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(compat_sigset_t))
+ return -EINVAL;
+
+ if (act) {
+ compat_uptr_t handler, restorer;
+
+ ret = get_user(handler, &act->sa_handler);
+ new_ka.sa.sa_handler = compat_ptr(handler);
+ ret |= get_user(restorer, &act->sa_restorer);
+ new_ka.sa.sa_restorer = compat_ptr(restorer);
+ ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
+ ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
+ if (ret)
+ return -EFAULT;
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+ if (!ret && oact) {
+ ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
+ ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
+ ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+ }
+ return ret;
+}
+
+int compat_do_sigaltstack(compat_uptr_t compat_uss, compat_uptr_t compat_uoss,
+ compat_ulong_t sp)
+{
+ compat_stack_t __user *newstack = compat_ptr(compat_uss);
+ compat_stack_t __user *oldstack = compat_ptr(compat_uoss);
+ compat_uptr_t ss_sp;
+ int ret;
+ mm_segment_t old_fs;
+ stack_t uss, uoss;
+
+ /* Marshall the compat new stack into a stack_t */
+ if (newstack) {
+ if (get_user(ss_sp, &newstack->ss_sp) ||
+ __get_user(uss.ss_flags, &newstack->ss_flags) ||
+ __get_user(uss.ss_size, &newstack->ss_size))
+ return -EFAULT;
+ uss.ss_sp = compat_ptr(ss_sp);
+ }
+
+ old_fs = get_fs();
+ set_fs(KERNEL_DS);
+ /* The __user pointer casts are valid because of the set_fs() */
+ ret = do_sigaltstack(
+ newstack ? (stack_t __user *) &uss : NULL,
+ oldstack ? (stack_t __user *) &uoss : NULL,
+ (unsigned long)sp);
+ set_fs(old_fs);
+
+ /* Convert the old stack_t into a compat stack. */
+ if (!ret && oldstack &&
+ (put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) ||
+ __put_user(uoss.ss_flags, &oldstack->ss_flags) ||
+ __put_user(uoss.ss_size, &oldstack->ss_size)))
+ return -EFAULT;
+ return ret;
+}
+
+static int compat_restore_sigframe(struct pt_regs *regs,
+ struct compat_sigframe __user *sf)
+{
+ int err;
+ sigset_t set;
+ struct compat_aux_sigframe __user *aux;
+
+ err = get_sigset_t(&set, &sf->uc.uc_sigmask);
+ if (err == 0) {
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ set_current_blocked(&set);
+ }
+
+ __get_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err);
+ __get_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err);
+ __get_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err);
+ __get_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err);
+ __get_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err);
+ __get_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err);
+ __get_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err);
+ __get_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err);
+ __get_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err);
+ __get_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err);
+ __get_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err);
+ __get_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err);
+ __get_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err);
+ __get_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err);
+ __get_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err);
+ __get_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err);
+ __get_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err);
+
+ /*
+ * Avoid compat_sys_sigreturn() restarting.
+ */
+ regs->syscallno = ~0UL;
+
+ err |= !valid_user_regs(&regs->user_regs);
+
+ aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace;
+ if (err == 0)
+ err |= compat_restore_vfp_context(&aux->vfp);
+
+ return err;
+}
+
+asmlinkage int compat_sys_sigreturn(struct pt_regs *regs)
+{
+ struct compat_sigframe __user *frame;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+ /*
+ * Since we stacked the signal on a 64-bit boundary,
+ * then 'sp' should be word aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (regs->compat_sp & 7)
+ goto badframe;
+
+ frame = (struct compat_sigframe __user *)regs->compat_sp;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+
+ if (compat_restore_sigframe(regs, frame))
+ goto badframe;
+
+ return regs->regs[0];
+
+badframe:
+ if (show_unhandled_signals)
+ pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n",
+ current->comm, task_pid_nr(current), __func__,
+ regs->pc, regs->sp);
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs)
+{
+ struct compat_rt_sigframe __user *frame;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+ /*
+ * Since we stacked the signal on a 64-bit boundary,
+ * then 'sp' should be word aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (regs->compat_sp & 7)
+ goto badframe;
+
+ frame = (struct compat_rt_sigframe __user *)regs->compat_sp;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+
+ if (compat_restore_sigframe(regs, &frame->sig))
+ goto badframe;
+
+ if (compat_do_sigaltstack(ptr_to_compat(&frame->sig.uc.uc_stack),
+ ptr_to_compat((void __user *)NULL),
+ regs->compat_sp) == -EFAULT)
+ goto badframe;
+
+ return regs->regs[0];
+
+badframe:
+ if (show_unhandled_signals)
+ pr_info_ratelimited("%s[%d]: bad frame in %s: pc=%08llx sp=%08llx\n",
+ current->comm, task_pid_nr(current), __func__,
+ regs->pc, regs->sp);
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+static inline void __user *compat_get_sigframe(struct k_sigaction *ka,
+ struct pt_regs *regs,
+ int framesize)
+{
+ compat_ulong_t sp = regs->compat_sp;
+ void __user *frame;
+
+ /*
+ * This is the X/Open sanctioned signal stack switching.
+ */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+
+ /*
+ * ATPCS B01 mandates 8-byte alignment
+ */
+ frame = compat_ptr((compat_uptr_t)((sp - framesize) & ~7));
+
+ /*
+ * Check that we can actually write to the signal frame.
+ */
+ if (!access_ok(VERIFY_WRITE, frame, framesize))
+ frame = NULL;
+
+ return frame;
+}
+
+static int compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka,
+ compat_ulong_t __user *rc, void __user *frame,
+ int usig)
+{
+ compat_ulong_t handler = ptr_to_compat(ka->sa.sa_handler);
+ compat_ulong_t retcode;
+ compat_ulong_t spsr = regs->pstate & ~PSR_f;
+ int thumb;
+
+ /* Check if the handler is written for ARM or Thumb */
+ thumb = handler & 1;
+
+ if (thumb) {
+ spsr |= COMPAT_PSR_T_BIT;
+ spsr &= ~COMPAT_PSR_IT_MASK;
+ } else {
+ spsr &= ~COMPAT_PSR_T_BIT;
+ }
+
+ if (ka->sa.sa_flags & SA_RESTORER) {
+ retcode = ptr_to_compat(ka->sa.sa_restorer);
+ } else {
+ /* Set up sigreturn pointer */
+ unsigned int idx = thumb << 1;
+
+ if (ka->sa.sa_flags & SA_SIGINFO)
+ idx += 3;
+
+ retcode = AARCH32_VECTORS_BASE +
+ AARCH32_KERN_SIGRET_CODE_OFFSET +
+ (idx << 2) + thumb;
+ }
+
+ regs->regs[0] = usig;
+ regs->compat_sp = ptr_to_compat(frame);
+ regs->compat_lr = retcode;
+ regs->pc = handler;
+ regs->pstate = spsr;
+
+ return 0;
+}
+
+static int compat_setup_sigframe(struct compat_sigframe __user *sf,
+ struct pt_regs *regs, sigset_t *set)
+{
+ struct compat_aux_sigframe __user *aux;
+ int err = 0;
+
+ __put_user_error(regs->regs[0], &sf->uc.uc_mcontext.arm_r0, err);
+ __put_user_error(regs->regs[1], &sf->uc.uc_mcontext.arm_r1, err);
+ __put_user_error(regs->regs[2], &sf->uc.uc_mcontext.arm_r2, err);
+ __put_user_error(regs->regs[3], &sf->uc.uc_mcontext.arm_r3, err);
+ __put_user_error(regs->regs[4], &sf->uc.uc_mcontext.arm_r4, err);
+ __put_user_error(regs->regs[5], &sf->uc.uc_mcontext.arm_r5, err);
+ __put_user_error(regs->regs[6], &sf->uc.uc_mcontext.arm_r6, err);
+ __put_user_error(regs->regs[7], &sf->uc.uc_mcontext.arm_r7, err);
+ __put_user_error(regs->regs[8], &sf->uc.uc_mcontext.arm_r8, err);
+ __put_user_error(regs->regs[9], &sf->uc.uc_mcontext.arm_r9, err);
+ __put_user_error(regs->regs[10], &sf->uc.uc_mcontext.arm_r10, err);
+ __put_user_error(regs->regs[11], &sf->uc.uc_mcontext.arm_fp, err);
+ __put_user_error(regs->regs[12], &sf->uc.uc_mcontext.arm_ip, err);
+ __put_user_error(regs->compat_sp, &sf->uc.uc_mcontext.arm_sp, err);
+ __put_user_error(regs->compat_lr, &sf->uc.uc_mcontext.arm_lr, err);
+ __put_user_error(regs->pc, &sf->uc.uc_mcontext.arm_pc, err);
+ __put_user_error(regs->pstate, &sf->uc.uc_mcontext.arm_cpsr, err);
+
+ __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.trap_no, err);
+ __put_user_error((compat_ulong_t)0, &sf->uc.uc_mcontext.error_code, err);
+ __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err);
+ __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err);
+
+ err |= put_sigset_t(&sf->uc.uc_sigmask, set);
+
+ aux = (struct compat_aux_sigframe __user *) sf->uc.uc_regspace;
+
+ if (err == 0)
+ err |= compat_preserve_vfp_context(&aux->vfp);
+ __put_user_error(0, &aux->end_magic, err);
+
+ return err;
+}
+
+/*
+ * 32-bit signal handling routines called from signal.c
+ */
+int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs)
+{
+ struct compat_rt_sigframe __user *frame;
+ compat_stack_t stack;
+ int err = 0;
+
+ frame = compat_get_sigframe(ka, regs, sizeof(*frame));
+
+ if (!frame)
+ return 1;
+
+ err |= copy_siginfo_to_user32(&frame->info, info);
+
+ __put_user_error(0, &frame->sig.uc.uc_flags, err);
+ __put_user_error(NULL, &frame->sig.uc.uc_link, err);
+
+ memset(&stack, 0, sizeof(stack));
+ stack.ss_sp = (compat_uptr_t)current->sas_ss_sp;
+ stack.ss_flags = sas_ss_flags(regs->compat_sp);
+ stack.ss_size = current->sas_ss_size;
+ err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
+
+ err |= compat_setup_sigframe(&frame->sig, regs, set);
+ if (err == 0)
+ err = compat_setup_return(regs, ka, frame->sig.retcode, frame,
+ usig);
+
+ if (err == 0) {
+ regs->regs[1] = (compat_ulong_t)(unsigned long)&frame->info;
+ regs->regs[2] = (compat_ulong_t)(unsigned long)&frame->sig.uc;
+ }
+
+ return err;
+}
+
+int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
+ struct pt_regs *regs)
+{
+ struct compat_sigframe __user *frame;
+ int err = 0;
+
+ frame = compat_get_sigframe(ka, regs, sizeof(*frame));
+
+ if (!frame)
+ return 1;
+
+ __put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err);
+
+ err |= compat_setup_sigframe(frame, regs, set);
+ if (err == 0)
+ err = compat_setup_return(regs, ka, frame->retcode, frame, usig);
+
+ return err;
+}
+
+/*
+ * RT signals don't have generic compat wrappers.
+ * See arch/powerpc/kernel/signal_32.c
+ */
+asmlinkage int compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
+ compat_sigset_t __user *oset,
+ compat_size_t sigsetsize)
+{
+ sigset_t s;
+ sigset_t __user *up;
+ int ret;
+ mm_segment_t old_fs = get_fs();
+
+ if (set) {
+ if (get_sigset_t(&s, set))
+ return -EFAULT;
+ }
+
+ set_fs(KERNEL_DS);
+ /* This is valid because of the set_fs() */
+ up = (sigset_t __user *) &s;
+ ret = sys_rt_sigprocmask(how, set ? up : NULL, oset ? up : NULL,
+ sigsetsize);
+ set_fs(old_fs);
+ if (ret)
+ return ret;
+ if (oset) {
+ if (put_sigset_t(oset, &s))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+asmlinkage int compat_sys_rt_sigpending(compat_sigset_t __user *set,
+ compat_size_t sigsetsize)
+{
+ sigset_t s;
+ int ret;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(KERNEL_DS);
+ /* The __user pointer cast is valid because of the set_fs() */
+ ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
+ set_fs(old_fs);
+ if (!ret) {
+ if (put_sigset_t(set, &s))
+ return -EFAULT;
+ }
+ return ret;
+}
+
+asmlinkage int compat_sys_rt_sigqueueinfo(int pid, int sig,
+ compat_siginfo_t __user *uinfo)
+{
+ siginfo_t info;
+ int ret;
+ mm_segment_t old_fs = get_fs();
+
+ ret = copy_siginfo_from_user32(&info, uinfo);
+ if (unlikely(ret))
+ return ret;
+
+ set_fs (KERNEL_DS);
+ /* The __user pointer cast is valid because of the set_fs() */
+ ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
+ set_fs (old_fs);
+ return ret;
+}
+
+void compat_setup_restart_syscall(struct pt_regs *regs)
+{
+ regs->regs[7] = __NR_restart_syscall;
+}
diff --git a/arch/arm64/kernel/sys32.S b/arch/arm64/kernel/sys32.S
new file mode 100644
index 0000000..5e4dc93
--- /dev/null
+++ b/arch/arm64/kernel/sys32.S
@@ -0,0 +1,282 @@
+/*
+ * Compat system call wrappers
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Authors: Will Deacon <will.deacon@xxxxxxx>
+ * Catalin Marinas <catalin.marinas@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+
+#include <asm/assembler.h>
+#include <asm/asm-offsets.h>
+
+/*
+ * System call wrappers for the AArch32 compatibility layer.
+ */
+compat_sys_fork_wrapper:
+ mov x0, sp
+ b compat_sys_fork
+ENDPROC(compat_sys_fork_wrapper)
+
+compat_sys_vfork_wrapper:
+ mov x0, sp
+ b compat_sys_vfork
+ENDPROC(compat_sys_vfork_wrapper)
+
+compat_sys_execve_wrapper:
+ mov x3, sp
+ b compat_sys_execve
+ENDPROC(compat_sys_execve_wrapper)
+
+compat_sys_clone_wrapper:
+ mov x5, sp
+ b compat_sys_clone
+ENDPROC(compat_sys_clone_wrapper)
+
+compat_sys_sigreturn_wrapper:
+ mov x0, sp
+ mov x27, #0 // prevent syscall restart handling (why)
+ b compat_sys_sigreturn
+ENDPROC(compat_sys_sigreturn_wrapper)
+
+compat_sys_rt_sigreturn_wrapper:
+ mov x0, sp
+ mov x27, #0 // prevent syscall restart handling (why)
+ b compat_sys_rt_sigreturn
+ENDPROC(compat_sys_rt_sigreturn_wrapper)
+
+compat_sys_sigaltstack_wrapper:
+ ldr x2, [sp, #S_COMPAT_SP]
+ b compat_do_sigaltstack
+ENDPROC(compat_sys_sigaltstack_wrapper)
+
+compat_sys_statfs64_wrapper:
+ mov w3, #84
+ cmp w1, #88
+ csel w1, w3, w1, eq
+ b compat_sys_statfs64
+ENDPROC(compat_sys_statfs64_wrapper)
+
+compat_sys_fstatfs64_wrapper:
+ mov w3, #84
+ cmp w1, #88
+ csel w1, w3, w1, eq
+ b compat_sys_fstatfs64
+ENDPROC(compat_sys_fstatfs64_wrapper)
+
+/*
+ * Wrappers for AArch32 syscalls that either take 64-bit parameters
+ * in registers or that take 32-bit parameters which require sign
+ * extension.
+ */
+compat_sys_lseek_wrapper:
+ sxtw x1, w1
+ b sys_lseek
+ENDPROC(compat_sys_lseek_wrapper)
+
+compat_sys_pread64_wrapper:
+ orr x3, x4, x5, lsl #32
+ b sys_pread64
+ENDPROC(compat_sys_pread64_wrapper)
+
+compat_sys_pwrite64_wrapper:
+ orr x3, x4, x5, lsl #32
+ b sys_pwrite64
+ENDPROC(compat_sys_pwrite64_wrapper)
+
+compat_sys_truncate64_wrapper:
+ orr x1, x2, x3, lsl #32
+ b sys_truncate
+ENDPROC(compat_sys_truncate64_wrapper)
+
+compat_sys_ftruncate64_wrapper:
+ orr x1, x2, x3, lsl #32
+ b sys_ftruncate
+ENDPROC(compat_sys_ftruncate64_wrapper)
+
+compat_sys_readahead_wrapper:
+ orr x1, x2, x3, lsl #32
+ mov w2, w4
+ b sys_readahead
+ENDPROC(compat_sys_readahead_wrapper)
+
+compat_sys_lookup_dcookie:
+ orr x0, x0, x1, lsl #32
+ mov w1, w2
+ mov w2, w3
+ b sys_lookup_dcookie
+ENDPROC(compat_sys_lookup_dcookie)
+
+compat_sys_fadvise64_64_wrapper:
+ mov w6, w1
+ orr x1, x2, x3, lsl #32
+ orr x2, x4, x5, lsl #32
+ mov w3, w6
+ b sys_fadvise64_64
+ENDPROC(compat_sys_fadvise64_64_wrapper)
+
+compat_sys_sync_file_range2_wrapper:
+ orr x2, x2, x3, lsl #32
+ orr x3, x4, x5, lsl #32
+ b sys_sync_file_range2
+ENDPROC(compat_sys_sync_file_range2_wrapper)
+
+compat_sys_fallocate_wrapper:
+ orr x2, x2, x3, lsl #32
+ orr x3, x4, x5, lsl #32
+ b sys_fallocate
+ENDPROC(compat_sys_fallocate_wrapper)
+
+compat_sys_fanotify_mark_wrapper:
+ orr x2, x2, x3, lsl #32
+ mov w3, w4
+ mov w4, w5
+ b sys_fanotify_mark
+ENDPROC(compat_sys_fanotify_mark_wrapper)
+
+/*
+ * Use the compat system call wrappers.
+ */
+#define sys_fork compat_sys_fork_wrapper
+#define sys_open compat_sys_open
+#define sys_execve compat_sys_execve_wrapper
+#define sys_lseek compat_sys_lseek_wrapper
+#define sys_mount compat_sys_mount
+#define sys_ptrace compat_sys_ptrace
+#define sys_times compat_sys_times
+#define sys_ioctl compat_sys_ioctl
+#define sys_fcntl compat_sys_fcntl
+#define sys_ustat compat_sys_ustat
+#define sys_sigaction compat_sys_sigaction
+#define sys_sigsuspend compat_sys_sigsuspend
+#define sys_sigpending compat_sys_sigpending
+#define sys_setrlimit compat_sys_setrlimit
+#define sys_getrusage compat_sys_getrusage
+#define sys_gettimeofday compat_sys_gettimeofday
+#define sys_settimeofday compat_sys_settimeofday
+#define sys_statfs compat_sys_statfs
+#define sys_fstatfs compat_sys_fstatfs
+#define sys_setitimer compat_sys_setitimer
+#define sys_getitimer compat_sys_getitimer
+#define sys_newstat compat_sys_newstat
+#define sys_newlstat compat_sys_newlstat
+#define sys_newfstat compat_sys_newfstat
+#define sys_wait4 compat_sys_wait4
+#define sys_sysinfo compat_sys_sysinfo
+#define sys_sigreturn compat_sys_sigreturn_wrapper
+#define sys_clone compat_sys_clone_wrapper
+#define sys_adjtimex compat_sys_adjtimex
+#define sys_sigprocmask compat_sys_sigprocmask
+#define sys_getdents compat_sys_getdents
+#define sys_select compat_sys_select
+#define sys_readv compat_sys_readv
+#define sys_writev compat_sys_writev
+#define sys_sysctl compat_sys_sysctl
+#define sys_sched_rr_get_interval compat_sys_sched_rr_get_interval
+#define sys_nanosleep compat_sys_nanosleep
+#define sys_rt_sigreturn compat_sys_rt_sigreturn_wrapper
+#define sys_rt_sigaction compat_sys_rt_sigaction
+#define sys_rt_sigprocmask compat_sys_rt_sigprocmask
+#define sys_rt_sigpending compat_sys_rt_sigpending
+#define sys_rt_sigtimedwait compat_sys_rt_sigtimedwait
+#define sys_rt_sigqueueinfo compat_sys_rt_sigqueueinfo
+#define sys_rt_sigsuspend compat_sys_rt_sigsuspend
+#define sys_pread64 compat_sys_pread64_wrapper
+#define sys_pwrite64 compat_sys_pwrite64_wrapper
+#define sys_sigaltstack compat_sys_sigaltstack_wrapper
+#define sys_sendfile compat_sys_sendfile
+#define sys_vfork compat_sys_vfork_wrapper
+#define sys_getrlimit compat_sys_getrlimit
+#define sys_mmap2 sys_mmap_pgoff
+#define sys_truncate64 compat_sys_truncate64_wrapper
+#define sys_ftruncate64 compat_sys_ftruncate64_wrapper
+#define sys_getdents64 compat_sys_getdents64
+#define sys_fcntl64 compat_sys_fcntl64
+#define sys_readahead compat_sys_readahead_wrapper
+#define sys_futex compat_sys_futex
+#define sys_sched_setaffinity compat_sys_sched_setaffinity
+#define sys_sched_getaffinity compat_sys_sched_getaffinity
+#define sys_io_setup compat_sys_io_setup
+#define sys_io_getevents compat_sys_io_getevents
+#define sys_io_submit compat_sys_io_submit
+#define sys_lookup_dcookie compat_sys_lookup_dcookie
+#define sys_timer_create compat_sys_timer_create
+#define sys_timer_settime compat_sys_timer_settime
+#define sys_timer_gettime compat_sys_timer_gettime
+#define sys_clock_settime compat_sys_clock_settime
+#define sys_clock_gettime compat_sys_clock_gettime
+#define sys_clock_getres compat_sys_clock_getres
+#define sys_clock_nanosleep compat_sys_clock_nanosleep
+#define sys_statfs64 compat_sys_statfs64_wrapper
+#define sys_fstatfs64 compat_sys_fstatfs64_wrapper
+#define sys_utimes compat_sys_utimes
+#define sys_fadvise64_64 compat_sys_fadvise64_64_wrapper
+#define sys_mq_open compat_sys_mq_open
+#define sys_mq_timedsend compat_sys_mq_timedsend
+#define sys_mq_timedreceive compat_sys_mq_timedreceive
+#define sys_mq_notify compat_sys_mq_notify
+#define sys_mq_getsetattr compat_sys_mq_getsetattr
+#define sys_waitid compat_sys_waitid
+#define sys_recv compat_sys_recv
+#define sys_recvfrom compat_sys_recvfrom
+#define sys_setsockopt compat_sys_setsockopt
+#define sys_getsockopt compat_sys_getsockopt
+#define sys_sendmsg compat_sys_sendmsg
+#define sys_recvmsg compat_sys_recvmsg
+#define sys_semctl compat_sys_semctl
+#define sys_msgsnd compat_sys_msgsnd
+#define sys_msgrcv compat_sys_msgrcv
+#define sys_msgctl compat_sys_msgctl
+#define sys_shmat compat_sys_shmat
+#define sys_shmctl compat_sys_shmctl
+#define sys_keyctl compat_sys_keyctl
+#define sys_semtimedop compat_sys_semtimedop
+#define sys_mbind compat_sys_mbind
+#define sys_get_mempolicy compat_sys_get_mempolicy
+#define sys_set_mempolicy compat_sys_set_mempolicy
+#define sys_openat compat_sys_openat
+#define sys_futimesat compat_sys_futimesat
+#define sys_pselect6 compat_sys_pselect6
+#define sys_ppoll compat_sys_ppoll
+#define sys_set_robust_list compat_sys_set_robust_list
+#define sys_get_robust_list compat_sys_get_robust_list
+#define sys_sync_file_range2 compat_sys_sync_file_range2_wrapper
+#define sys_vmsplice compat_sys_vmsplice
+#define sys_move_pages compat_sys_move_pages
+#define sys_epoll_pwait compat_sys_epoll_pwait
+#define sys_kexec_load compat_sys_kexec_load
+#define sys_utimensat compat_sys_utimensat
+#define sys_signalfd compat_sys_signalfd
+#define sys_fallocate compat_sys_fallocate_wrapper
+#define sys_timerfd_settime compat_sys_timerfd_settime
+#define sys_timerfd_gettime compat_sys_timerfd_gettime
+#define sys_signalfd4 compat_sys_signalfd4
+#define sys_preadv compat_sys_preadv
+#define sys_pwritev compat_sys_pwritev
+#define sys_rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
+#define sys_recvmmsg compat_sys_recvmmsg
+#define sys_fanotify_mark compat_sys_fanotify_mark_wrapper
+
+#undef __SYSCALL
+#define __SYSCALL(x, y) .quad y // x
+#define __SYSCALL_COMPAT
+
+/*
+ * The system calls table must be 4KB aligned.
+ */
+ .align 12
+ENTRY(compat_sys_call_table)
+#include <asm/unistd.h>
diff --git a/arch/arm64/kernel/sys_compat.c b/arch/arm64/kernel/sys_compat.c
new file mode 100644
index 0000000..967e92f
--- /dev/null
+++ b/arch/arm64/kernel/sys_compat.c
@@ -0,0 +1,164 @@
+/*
+ * Based on arch/arm/kernel/sys_arm.c
+ *
+ * Copyright (C) People who wrote linux/arch/i386/kernel/sys_i386.c
+ * Copyright (C) 1995, 1996 Russell King.
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define __SYSCALL_COMPAT
+
+#include <linux/compat.h>
+#include <linux/personality.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/uaccess.h>
+
+#include <asm/cacheflush.h>
+#include <asm/unistd.h>
+
+asmlinkage int compat_sys_fork(struct pt_regs *regs)
+{
+ return do_fork(SIGCHLD, regs->compat_sp, regs, 0, NULL, NULL);
+}
+
+asmlinkage int compat_sys_clone(unsigned long clone_flags, unsigned long newsp,
+ int __user *parent_tidptr, int tls_val,
+ int __user *child_tidptr, struct pt_regs *regs)
+{
+ if (!newsp)
+ newsp = regs->compat_sp;
+
+ return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr);
+}
+
+asmlinkage int compat_sys_vfork(struct pt_regs *regs)
+{
+ return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->compat_sp,
+ regs, 0, NULL, NULL);
+}
+
+asmlinkage int compat_sys_execve(const char __user *filenamei,
+ compat_uptr_t argv, compat_uptr_t envp,
+ struct pt_regs *regs)
+{
+ int error;
+ char * filename;
+
+ filename = getname(filenamei);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ goto out;
+ error = compat_do_execve(filename, compat_ptr(argv), compat_ptr(envp),
+ regs);
+ putname(filename);
+out:
+ return error;
+}
+
+asmlinkage int compat_sys_sched_rr_get_interval(compat_pid_t pid,
+ struct compat_timespec __user *interval)
+{
+ struct timespec t;
+ int ret;
+ mm_segment_t old_fs = get_fs();
+
+ set_fs(KERNEL_DS);
+ ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
+ set_fs(old_fs);
+ if (put_compat_timespec(&t, interval))
+ return -EFAULT;
+ return ret;
+}
+
+asmlinkage int compat_sys_sendfile(int out_fd, int in_fd,
+ compat_off_t __user *offset, s32 count)
+{
+ mm_segment_t old_fs = get_fs();
+ int ret;
+ off_t of;
+
+ if (offset && get_user(of, offset))
+ return -EFAULT;
+
+ set_fs(KERNEL_DS);
+ ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
+ count);
+ set_fs(old_fs);
+
+ if (offset && put_user(of, offset))
+ return -EFAULT;
+ return ret;
+}
+
+static inline void
+do_compat_cache_op(unsigned long start, unsigned long end, int flags)
+{
+ struct mm_struct *mm = current->active_mm;
+ struct vm_area_struct *vma;
+
+ if (end < start || flags)
+ return;
+
+ down_read(&mm->mmap_sem);
+ vma = find_vma(mm, start);
+ if (vma && vma->vm_start < end) {
+ if (start < vma->vm_start)
+ start = vma->vm_start;
+ if (end > vma->vm_end)
+ end = vma->vm_end;
+ up_read(&mm->mmap_sem);
+ __flush_cache_user_range(start & PAGE_MASK, PAGE_ALIGN(end));
+ return;
+ }
+ up_read(&mm->mmap_sem);
+}
+
+/*
+ * Handle all unrecognised system calls.
+ */
+long compat_arm_syscall(struct pt_regs *regs)
+{
+ unsigned int no = regs->regs[7];
+
+ switch (no) {
+ /*
+ * Flush a region from virtual address 'r0' to virtual address 'r1'
+ * _exclusive_. There is no alignment requirement on either address;
+ * user space does not need to know the hardware cache layout.
+ *
+ * r2 contains flags. It should ALWAYS be passed as ZERO until it
+ * is defined to be something else. For now we ignore it, but may
+ * the fires of hell burn in your belly if you break this rule. ;)
+ *
+ * (at a later date, we may want to allow this call to not flush
+ * various aspects of the cache. Passing '0' will guarantee that
+ * everything necessary gets flushed to maintain consistency in
+ * the specified region).
+ */
+ case __ARM_NR_compat_cacheflush:
+ do_compat_cache_op(regs->regs[0], regs->regs[1], regs->regs[2]);
+ return 0;
+
+ case __ARM_NR_compat_set_tls:
+ current->thread.tp_value = regs->regs[0];
+ asm ("msr tpidrro_el0, %0" : : "r" (regs->regs[0]));
+ return 0;
+
+ default:
+ return -ENOSYS;
+ }
+}

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