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[PATCH v6 00/21] ILP32 for ARM64

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[PATCH v6 00/21] ILP32 for ARM64

Yury Norov-2
This series enables aarch64 with ilp32 mode, and as supporting work,
introduces compat wrappers based on s390 solution, and also introduces
ARCH_32BIT_OFF_T configuration option that is enabled for existing
32-bit architectures but disabled for new arches (so 64-bit off_t is
is used by new userspace).

This version is based on kernel v4.6.
It works with glibc-2.23, and tested with LTP.

It was tested on QEMU and ThunderX machines. No major differences found.

This is not RFC anymore, because ILP32 is now tested in big-endian mode;
signals, vDSO and other subsystems are tested, and look working

 v3: https://lkml.org/lkml/2014/9/3/704
 v4: https://lkml.org/lkml/2015/4/13/691
 v5: https://lkml.org/lkml/2015/9/29/911
 v6: ABI reworked significantly;
    - syscall input arguments are deloused with compat wrappers;
    - vDSO is now working for both BE and LE;
    - signal subsystem is reworked to handle signal context properly;
    - binfmt_elf is reworked, and now most of places where execution mode
      should be detected, are handled statically;
    - many other less-important fixes.

ILP32 glibc branch is available here:
https://github.com/norov/glibc/tree/ilp32-2.23

It is tested with this series with no major downsides. I will send it to
glibc-alpha soon, after final revise. Please review and comment it as well.

Andrew Pinski (6):
  arm64: ensure the kernel is compiled for LP64
  arm64: rename COMPAT to AARCH32_EL0 in Kconfig
  arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64
  arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use
    it
  arm64: ilp32: introduce ilp32-specific handlers for sigframe and
    ucontext
  arm64:ilp32: add ARM64_ILP32 to Kconfig

Philipp Tomsich (1):
  arm64:ilp32: add vdso-ilp32 and use for signal return

Yury Norov (15):
  all: introduce COMPAT_WRAPPER option and enable it for s390
  all: s390: move wrapper infrastructure to generic headers
  all: s390: move compat_wrappers.c from arch/s390/kernel to kernel/
  all: wrap needed syscalls in generic unistd
  compat ABI: use non-compat openat and open_by_handle_at variants
  32-bit ABI: introduce ARCH_32BIT_OFF_T config option
  arm64: ilp32: add documentation on the ILP32 ABI for ARM64
  thread: move thread bits accessors to separated file
  arm64: introduce is_a32_task and is_a32_thread (for AArch32 compat)
  arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64
  arm64: introduce binfmt_elf32.c
  arm64: ilp32: introduce binfmt_ilp32.c
  arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32
  arm64: signal: share lp64 signal routines to ilp32
  arm64: signal32: move ilp32 and aarch32 common code to separated file

 Documentation/arm64/ilp32.txt                 |  25 +++
 arch/Kconfig                                  |   8 +
 arch/arc/Kconfig                              |   1 +
 arch/arm/Kconfig                              |   1 +
 arch/arm64/Kconfig                            |  20 +-
 arch/arm64/Makefile                           |   5 +
 arch/arm64/include/asm/compat.h               |  19 +-
 arch/arm64/include/asm/elf.h                  |  35 +---
 arch/arm64/include/asm/fpsimd.h               |   2 +-
 arch/arm64/include/asm/ftrace.h               |   2 +-
 arch/arm64/include/asm/hwcap.h                |   6 +-
 arch/arm64/include/asm/is_compat.h            |  84 ++++++++
 arch/arm64/include/asm/memory.h               |   3 +-
 arch/arm64/include/asm/processor.h            |  11 +-
 arch/arm64/include/asm/ptrace.h               |   2 +-
 arch/arm64/include/asm/signal32.h             |   6 +-
 arch/arm64/include/asm/signal32_common.h      |  25 +++
 arch/arm64/include/asm/signal_common.h        |  33 +++
 arch/arm64/include/asm/signal_ilp32.h         |  34 ++++
 arch/arm64/include/asm/syscall.h              |   2 +-
 arch/arm64/include/asm/thread_info.h          |   4 +-
 arch/arm64/include/asm/unistd.h               |  11 +-
 arch/arm64/include/asm/unistd32.h             |   2 +-
 arch/arm64/include/asm/vdso.h                 |   6 +
 arch/arm64/include/uapi/asm/bitsperlong.h     |   9 +-
 arch/arm64/kernel/Makefile                    |  14 +-
 arch/arm64/kernel/asm-offsets.c               |   9 +-
 arch/arm64/kernel/binfmt_elf32.c              |  33 +++
 arch/arm64/kernel/binfmt_ilp32.c              |  91 +++++++++
 arch/arm64/kernel/cpufeature.c                |   8 +-
 arch/arm64/kernel/cpuinfo.c                   |   4 +-
 arch/arm64/kernel/entry.S                     |  16 +-
 arch/arm64/kernel/entry_ilp32.S               |  23 +++
 arch/arm64/kernel/head.S                      |   2 +-
 arch/arm64/kernel/hw_breakpoint.c             |  10 +-
 arch/arm64/kernel/perf_regs.c                 |   2 +-
 arch/arm64/kernel/process.c                   |   7 +-
 arch/arm64/kernel/ptrace.c                    |  67 ++++++-
 arch/arm64/kernel/signal.c                    | 100 ++++++----
 arch/arm64/kernel/signal32.c                  |  85 --------
 arch/arm64/kernel/signal32_common.c           | 115 +++++++++++
 arch/arm64/kernel/signal_ilp32.c              | 192 ++++++++++++++++++
 arch/arm64/kernel/sys32.c                     |   1 +
 arch/arm64/kernel/sys_ilp32.c                 |  86 ++++++++
 arch/arm64/kernel/traps.c                     |   5 +-
 arch/arm64/kernel/vdso-ilp32/.gitignore       |   2 +
 arch/arm64/kernel/vdso-ilp32/Makefile         |  74 +++++++
 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S     |  33 +++
 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S |  95 +++++++++
 arch/arm64/kernel/vdso.c                      |  65 ++++--
 arch/arm64/kernel/vdso/gettimeofday.S         |  20 +-
 arch/blackfin/Kconfig                         |   1 +
 arch/cris/Kconfig                             |   1 +
 arch/frv/Kconfig                              |   1 +
 arch/h8300/Kconfig                            |   1 +
 arch/hexagon/Kconfig                          |   1 +
 arch/m32r/Kconfig                             |   1 +
 arch/m68k/Kconfig                             |   1 +
 arch/metag/Kconfig                            |   1 +
 arch/microblaze/Kconfig                       |   1 +
 arch/mips/Kconfig                             |   1 +
 arch/mn10300/Kconfig                          |   1 +
 arch/nios2/Kconfig                            |   1 +
 arch/openrisc/Kconfig                         |   1 +
 arch/parisc/Kconfig                           |   1 +
 arch/powerpc/Kconfig                          |   1 +
 arch/s390/Kconfig                             |   1 +
 arch/s390/include/asm/compat.h                |  17 +-
 arch/s390/kernel/Makefile                     |   2 +-
 arch/s390/kernel/compat_linux.c               |   4 +
 arch/s390/kernel/compat_wrapper.c             | 180 -----------------
 arch/score/Kconfig                            |   1 +
 arch/sh/Kconfig                               |   1 +
 arch/sparc/Kconfig                            |   1 +
 arch/tile/Kconfig                             |   1 +
 arch/tile/kernel/compat.c                     |   3 +
 arch/unicore32/Kconfig                        |   1 +
 arch/x86/Kconfig                              |   1 +
 arch/x86/um/Kconfig                           |   1 +
 arch/xtensa/Kconfig                           |   1 +
 drivers/clocksource/arm_arch_timer.c          |   2 +-
 include/linux/compat.h                        | 277 ++++++++++++++++++++++++++
 include/linux/fcntl.h                         |   2 +-
 include/linux/ptrace.h                        |   6 +
 include/linux/syscalls.h                      |  57 +-----
 include/linux/syscalls_structs.h              |  60 ++++++
 include/linux/thread_bits.h                   |  55 +++++
 include/linux/thread_info.h                   |  44 +---
 include/uapi/asm-generic/unistd.h             | 231 ++++++++++-----------
 kernel/Makefile                               |   1 +
 kernel/compat_wrapper.c                       | 175 ++++++++++++++++
 kernel/ptrace.c                               |  10 +-
 92 files changed, 2024 insertions(+), 641 deletions(-)
 create mode 100644 Documentation/arm64/ilp32.txt
 create mode 100644 arch/arm64/include/asm/is_compat.h
 create mode 100644 arch/arm64/include/asm/signal32_common.h
 create mode 100644 arch/arm64/include/asm/signal_common.h
 create mode 100644 arch/arm64/include/asm/signal_ilp32.h
 create mode 100644 arch/arm64/kernel/binfmt_elf32.c
 create mode 100644 arch/arm64/kernel/binfmt_ilp32.c
 create mode 100644 arch/arm64/kernel/entry_ilp32.S
 create mode 100644 arch/arm64/kernel/signal32_common.c
 create mode 100644 arch/arm64/kernel/signal_ilp32.c
 create mode 100644 arch/arm64/kernel/sys_ilp32.c
 create mode 100644 arch/arm64/kernel/vdso-ilp32/.gitignore
 create mode 100644 arch/arm64/kernel/vdso-ilp32/Makefile
 create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S
 create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S
 delete mode 100644 arch/s390/kernel/compat_wrapper.c
 create mode 100644 include/linux/syscalls_structs.h
 create mode 100644 include/linux/thread_bits.h
 create mode 100644 kernel/compat_wrapper.c

--
2.5.0

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[PATCH 01/23] all: syscall wrappers: add documentation

Yury Norov-2
Signed-off-by: Yury Norov <[hidden email]>
---
 Documentation/adding-syscalls.txt | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/Documentation/adding-syscalls.txt b/Documentation/adding-syscalls.txt
index cc2d4ac..d02a6bd 100644
--- a/Documentation/adding-syscalls.txt
+++ b/Documentation/adding-syscalls.txt
@@ -341,6 +341,38 @@ To summarize, you need:
  - instance of __SC_COMP not __SYSCALL in include/uapi/asm-generic/unistd.h
 
 
+Compatibility System Calls Wrappers
+--------------------------------
+
+Some architectures prevent 32-bit userspace from access to top halves of 64-bit
+registers, but some not. It's not a problem if specific argument is the same
+size in kernel and userspace. It also is not a problem if system call is already
+handled by compatible routine. Otherwise we'd take care of it. Usually, glibc
+and compiler handles register's top halve, but from kernel side, we cannot rely
+on it, as malicious code may cause incorrect behaviour and/or security
+vulnerabilities.
+
+For now, only s390 and arm64/ilp32 are affected.
+
+To clear that top halves, automatic wrappers are introduced. They clear all
+required registers before passing control to regular syscall handler.
+
+If your architecture allows userspace code to access top halves of register,
+you need to:
+ - enable COMPAT_WRAPPER in configuration file;
+ - declare: "#define __SC_WRAP(nr, sym) [nr] = compat_##sym,", just before
+   compatible syscall table declaration, if you use generic unistd; or
+ - declare compat wrappers manually, if you use non-generic syscall table.
+   The list of unsafe syscalls is in kernel/compat_wrapper.
+
+If you write new syscall, make sure, its arguments are the same size in both
+64- and 32-bits modes. If no, and if there's no explicit compat version for
+syscall handler, you need to:
+ - declare compat version prototype in 'include/linux/compat.h';
+ - in 'include/uapi/asm-generic/unistd.h' declare syscall with macro '__SC_WRAP'
+   instead of '__SYSCALL';
+ - add corresponding line to 'kernel/compat_wrapper.c' to let it generate wrapper.
+
 Compatibility System Calls (x86)
 --------------------------------
 
--
2.5.0

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[PATCH 03/23] all: s390: move wrapper infrastructure to generic headers

Yury Norov-2
In reply to this post by Yury Norov-2
This patch moves required calls to generic files to let other arches use
it if needed. Here also, additional code is introduced, as s390 uses asm
syscall tables, while in general case, wrappers may be used in C code.

__SC_COMPAT_CAST for s390 is too specific due to 31-bit pointer length, so it's
moved to arch/s390/include/asm/compat.h. Generic declaration assumes that long,
unsigned long and pointer types are all 32-bit length.

linux/syscalls_structs.h header is introduced, because from now (see next patch)
structure types listed there are needed for both normal and compat mode.

cond_syscall_wrapped now defined two symbols: sys_foo() and compat_sys_foo(), if
compat wrappers are enabled.

Here __SC_WRAP() macro is introduced as well. s390 doesn't need it as it uses
asm-generated syscall table. But architectures that generate that tables with
C code (ARM64/ILP32) should redefine it as '#define __SC_WRAP(name) compat_##name'.

Signed-off-by: Yury Norov <[hidden email]>
---
 arch/s390/include/asm/compat.h    | 17 +++++++++--
 arch/s390/kernel/compat_wrapper.c | 51 ---------------------------------
 include/linux/compat.h            | 52 +++++++++++++++++++++++++++++++++
 include/linux/syscalls.h          | 57 +------------------------------------
 include/linux/syscalls_structs.h  | 60 +++++++++++++++++++++++++++++++++++++++
 include/uapi/asm-generic/unistd.h |  4 +++
 6 files changed, 132 insertions(+), 109 deletions(-)
 create mode 100644 include/linux/syscalls_structs.h

diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index 352f7bd..f412723 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -7,13 +7,26 @@
 #include <linux/sched.h>
 #include <linux/thread_info.h>
 
-#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64))
-
 #define __SC_DELOUSE(t,v) ({ \
  BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
  (t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
 })
 
+#define __SC_COMPAT_CAST(t, a) \
+({ \
+ long __ReS = a; \
+ \
+ BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \
+     !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \
+ if (__TYPE_IS_L(t)) \
+ __ReS = (s32)a; \
+ if (__TYPE_IS_UL(t)) \
+ __ReS = (u32)a; \
+ if (__TYPE_IS_PTR(t)) \
+ __ReS = a & 0x7fffffff; \
+ (t)__ReS; \
+})
+
 #define PSW32_MASK_PER 0x40000000UL
 #define PSW32_MASK_DAT 0x04000000UL
 #define PSW32_MASK_IO 0x02000000UL
diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c
index ae2cda5..1614e15 100644
--- a/arch/s390/kernel/compat_wrapper.c
+++ b/arch/s390/kernel/compat_wrapper.c
@@ -8,57 +8,6 @@
 #include <linux/compat.h>
 #include "entry.h"
 
-#define COMPAT_SYSCALL_WRAP1(name, ...) \
- COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP2(name, ...) \
- COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP3(name, ...) \
- COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP4(name, ...) \
- COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP5(name, ...) \
- COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
-#define COMPAT_SYSCALL_WRAP6(name, ...) \
- COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
-
-#define __SC_COMPAT_TYPE(t, a) \
- __typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
-
-#define __SC_COMPAT_CAST(t, a) \
-({ \
- long __ReS = a; \
- \
- BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \
-     !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \
- if (__TYPE_IS_L(t)) \
- __ReS = (s32)a; \
- if (__TYPE_IS_UL(t)) \
- __ReS = (u32)a; \
- if (__TYPE_IS_PTR(t)) \
- __ReS = a & 0x7fffffff; \
- (t)__ReS; \
-})
-
-/*
- * The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by
- * compat tasks. These wrappers will only be used for system calls where only
- * the system call arguments need sign or zero extension or zeroing of the upper
- * 33 bits of pointers.
- * Note: since the wrapper function will afterwards call a system call which
- * again performs zero and sign extension for all system call arguments with
- * a size of less than eight bytes, these compat wrappers only touch those
- * system call arguments with a size of eight bytes ((unsigned) long and
- * pointers). Zero and sign extension for e.g. int parameters will be done by
- * the regular system call wrappers.
- */
-#define COMPAT_SYSCALL_WRAPx(x, name, ...) \
-asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
-asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__));\
-asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)) \
-{ \
- return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__)); \
-}
-
 COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
 COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
 COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
diff --git a/include/linux/compat.h b/include/linux/compat.h
index f964ef7..4eba16e 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -30,6 +30,10 @@
 #define __SC_DELOUSE(t,v) ((t)(unsigned long)(v))
 #endif
 
+#ifndef __TYPE_IS_PTR
+#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64))
+#endif
+
 #define COMPAT_SYSCALL_DEFINE0(name) \
  asmlinkage long compat_sys_##name(void)
 
@@ -739,4 +743,52 @@ static inline bool in_compat_syscall(void) { return false; }
 
 #endif /* CONFIG_COMPAT */
 
+#ifdef CONFIG_COMPAT_WRAPPER
+
+#define COMPAT_SYSCALL_WRAP1(name, ...) COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP2(name, ...) COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP3(name, ...) COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP4(name, ...) COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP5(name, ...) COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__)
+#define COMPAT_SYSCALL_WRAP6(name, ...) COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__)
+
+#ifndef __SC_COMPAT_TYPE
+#define __SC_COMPAT_TYPE(t, a) \
+ __typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a
+#endif
+
+#ifndef __SC_COMPAT_CAST
+#define __SC_COMPAT_CAST(t, a) ({ \
+ BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \
+     !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \
+ ((t) ((t)(-1) < 0 ? (s64)(s32)(a) : (u64)(u32)(a))); \
+})
+#endif
+
+#ifndef COMPAT_SYSCALL_WRAPx
+/*
+ * The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by
+ * compat tasks. These wrappers will only be used for system calls where only
+ * the system call arguments need sign or zero extension or zeroing of the upper
+ * parts of arguments passed in register.
+ * Note: since the wrapper function will afterwards call a system call which
+ * again performs zero and sign extension for all system call arguments with
+ * a size of less than eight bytes, these compat wrappers only touch those
+ * system call arguments with a size of eight bytes ((unsigned) long and
+ * pointers). Zero and sign extension for e.g. int parameters will be done by
+ * the regular system call wrappers.
+ */
+#define COMPAT_SYSCALL_WRAPx(x, name, ...) \
+asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
+asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \
+ __attribute__((alias(__stringify(compat_SyS##name)))); \
+asmlinkage long notrace compat_SyS##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)); \
+asmlinkage long notrace compat_SyS##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)) \
+{ \
+ return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__)); \
+}
+#endif
+
+#endif /* CONFIG_COMPAT_WRAPPER */
+
 #endif /* _LINUX_COMPAT_H */
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index d795472..9d345eb 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -11,62 +11,7 @@
 #ifndef _LINUX_SYSCALLS_H
 #define _LINUX_SYSCALLS_H
 
-struct epoll_event;
-struct iattr;
-struct inode;
-struct iocb;
-struct io_event;
-struct iovec;
-struct itimerspec;
-struct itimerval;
-struct kexec_segment;
-struct linux_dirent;
-struct linux_dirent64;
-struct list_head;
-struct mmap_arg_struct;
-struct msgbuf;
-struct user_msghdr;
-struct mmsghdr;
-struct msqid_ds;
-struct new_utsname;
-struct nfsctl_arg;
-struct __old_kernel_stat;
-struct oldold_utsname;
-struct old_utsname;
-struct pollfd;
-struct rlimit;
-struct rlimit64;
-struct rusage;
-struct sched_param;
-struct sched_attr;
-struct sel_arg_struct;
-struct semaphore;
-struct sembuf;
-struct shmid_ds;
-struct sockaddr;
-struct stat;
-struct stat64;
-struct statfs;
-struct statfs64;
-struct __sysctl_args;
-struct sysinfo;
-struct timespec;
-struct timeval;
-struct timex;
-struct timezone;
-struct tms;
-struct utimbuf;
-struct mq_attr;
-struct compat_stat;
-struct compat_timeval;
-struct robust_list_head;
-struct getcpu_cache;
-struct old_linux_dirent;
-struct perf_event_attr;
-struct file_handle;
-struct sigaltstack;
-union bpf_attr;
-
+#include <linux/syscalls_structs.h>
 #include <linux/types.h>
 #include <linux/aio_abi.h>
 #include <linux/capability.h>
diff --git a/include/linux/syscalls_structs.h b/include/linux/syscalls_structs.h
new file mode 100644
index 0000000..a920cbc
--- /dev/null
+++ b/include/linux/syscalls_structs.h
@@ -0,0 +1,60 @@
+#ifndef _LINUX_SYSCALL_STRUCTS_H
+#define _LINUX_SYSCALL_STRUCTS_H
+
+struct epoll_event;
+struct iattr;
+struct inode;
+struct iocb;
+struct io_event;
+struct iovec;
+struct itimerspec;
+struct itimerval;
+struct kexec_segment;
+struct linux_dirent;
+struct linux_dirent64;
+struct list_head;
+struct mmap_arg_struct;
+struct msgbuf;
+struct user_msghdr;
+struct mmsghdr;
+struct msqid_ds;
+struct new_utsname;
+struct nfsctl_arg;
+struct __old_kernel_stat;
+struct oldold_utsname;
+struct old_utsname;
+struct pollfd;
+struct rlimit;
+struct rlimit64;
+struct rusage;
+struct sched_param;
+struct sched_attr;
+struct sel_arg_struct;
+struct semaphore;
+struct sembuf;
+struct shmid_ds;
+struct sockaddr;
+struct stat;
+struct stat64;
+struct statfs;
+struct statfs64;
+struct __sysctl_args;
+struct sysinfo;
+struct timespec;
+struct timeval;
+struct timex;
+struct timezone;
+struct tms;
+struct utimbuf;
+struct mq_attr;
+struct compat_stat;
+struct compat_timeval;
+struct robust_list_head;
+struct getcpu_cache;
+struct old_linux_dirent;
+struct perf_event_attr;
+struct file_handle;
+struct sigaltstack;
+union bpf_attr;
+
+#endif /* _LINUX_SYSCALL_STRUCTS_H */
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index c51afb7..7e91d83 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -29,6 +29,10 @@
 #define __SC_COMP_3264(_nr, _32, _64, _comp) __SC_3264(_nr, _32, _64)
 #endif
 
+#ifndef __SC_WRAP
+#define __SC_WRAP __SYSCALL
+#endif
+
 #define __NR_io_setup 0
 __SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup)
 #define __NR_io_destroy 1
--
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[PATCH 06/23] compat ABI: use non-compat openat and open_by_handle_at variants

Yury Norov-2
In reply to this post by Yury Norov-2
The only difference is that non-compat version forces O_LARGEFILE,
and it should be the default behaviour for all architectures, as
we don't support 32-bit off_t. The only exception is tile32, that
continues with compat version of syscalls.

Signed-off-by: Yury Norov <[hidden email]>
Acked-by: Arnd Bergmann <[hidden email]>
Acked-by: Chris Metcalf <[hidden email]> [for tile]
---
 arch/tile/kernel/compat.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c
index 4912084..489ae19 100644
--- a/arch/tile/kernel/compat.c
+++ b/arch/tile/kernel/compat.c
@@ -94,6 +94,9 @@ COMPAT_SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned int, offset_high,
 #define compat_sys_readahead sys32_readahead
 #define sys_llseek compat_sys_llseek
 
+#define sys_openat compat_sys_openat
+#define sys_open_by_handle_at compat_sys_open_by_handle_at
+
 /* Call the assembly trampolines where necessary. */
 #define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn
 #define sys_clone _sys_clone
--
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[PATCH 08/23] arm64: ilp32: add documentation on the ILP32 ABI for ARM64

Yury Norov-2
In reply to this post by Yury Norov-2
Based on Andrew Pinski's patch-series.

Signed-off-by: Yury Norov <[hidden email]>
---
 Documentation/arm64/ilp32.txt | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/arm64/ilp32.txt

diff --git a/Documentation/arm64/ilp32.txt b/Documentation/arm64/ilp32.txt
new file mode 100644
index 0000000..8e74d67
--- /dev/null
+++ b/Documentation/arm64/ilp32.txt
@@ -0,0 +1,25 @@
+ILP32 AARCH64 SYSCALL ABI
+=========================
+
+This document describes the ILP32 syscall ABI and where it differs
+from the generic compat linux syscall interface.
+
+Syscalls which normally would pass 64bit values as two arguments;
+now pass the 64bit value as one argument. Next syscalls are affected:
+fadvise64_64,
+fallocate,
+ftruncate,
+lookup_dcookie,
+pread64,
+pwrite64,
+readahead,
+shmat,
+sync_file_range,
+truncate,
+lseek,
+mmap
+
+struct rt_sigframe is redefined and contains struct compat_siginfo,
+as compat syscalls expects, and struct ilp32_sigframe, to handle
+AARCH64 register set and 32-bit userspace register representation.
+
--
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[PATCH 09/23] arm64: ensure the kernel is compiled for LP64

Yury Norov-2
In reply to this post by Yury Norov-2
From: Andrew Pinski <[hidden email]>

The kernel needs to be compiled as a LP64 binary for ARM64, even when
using a compiler that defaults to code-generation for the ILP32 ABI.
Consequently, we need to explicitly pass '-mabi=lp64' (supported on
gcc-4.9 and newer).

Signed-off-by: Andrew Pinski <[hidden email]>
Signed-off-by: Philipp Tomsich <[hidden email]>
Signed-off-by: Christoph Muellner <[hidden email]>
Signed-off-by: Yury Norov <[hidden email]>
Reviewed-by: David Daney <[hidden email]>
---
 arch/arm64/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 354d754..29ebf23 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -35,14 +35,19 @@ KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads)
 KBUILD_AFLAGS += $(lseinstr)
 
+KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
+KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
+
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS += -mbig-endian
 AS += -EB
 LD += -EB
+LDFLAGS += -maarch64linuxb
 else
 KBUILD_CPPFLAGS += -mlittle-endian
 AS += -EL
 LD += -EL
+LDFLAGS += -maarch64linux
 endif
 
 CHECKFLAGS += -D__aarch64__
--
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[PATCH 11/23] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64

Yury Norov-2
In reply to this post by Yury Norov-2
From: Andrew Pinski <[hidden email]>

Define __BITS_PER_LONG depending on the ABI used (i.e. check whether
__ILP32__ or __LP64__ is defined).  This is necessary for glibc to
determine the appropriate type definitions for the system call interface.

Signed-off-by: Andrew Pinski <[hidden email]>
Signed-off-by: Philipp Tomsich <[hidden email]>
Signed-off-by: Christoph Muellner <[hidden email]>
Signed-off-by: Yury Norov <[hidden email]>
Reviewed-by: David Daney <[hidden email]>
---
 arch/arm64/include/uapi/asm/bitsperlong.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/uapi/asm/bitsperlong.h b/arch/arm64/include/uapi/asm/bitsperlong.h
index fce9c29..4265243 100644
--- a/arch/arm64/include/uapi/asm/bitsperlong.h
+++ b/arch/arm64/include/uapi/asm/bitsperlong.h
@@ -16,7 +16,14 @@
 #ifndef __ASM_BITSPERLONG_H
 #define __ASM_BITSPERLONG_H
 
-#define __BITS_PER_LONG 64
+#if defined(__LP64__)
+/* Assuming __LP64__ will be defined for native ELF64's and not for ILP32. */
+#  define __BITS_PER_LONG 64
+#elif defined(__ILP32__)
+#  define __BITS_PER_LONG 32
+#else
+#  error "Neither LP64 nor ILP32: unsupported ABI in asm/bitsperlong.h"
+#endif
 
 #include <asm-generic/bitsperlong.h>
 
--
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[PATCH 12/23] thread: move thread bits accessors to separated file

Yury Norov-2
In reply to this post by Yury Norov-2
They may be accessed from low-level code, so isolating is a measure to
avoid circular dependencies in header files.

The exact reason for circular dependency is WARN_ON() macro added by Al
Viro in patch [edd63a27] "set_restore_sigmask() is never called without
SIGPENDING (and never should be)"

Signed-off-by: Yury Norov <[hidden email]>
---
 include/linux/thread_bits.h | 55 +++++++++++++++++++++++++++++++++++++++++++++
 include/linux/thread_info.h | 44 +-----------------------------------
 2 files changed, 56 insertions(+), 43 deletions(-)
 create mode 100644 include/linux/thread_bits.h

diff --git a/include/linux/thread_bits.h b/include/linux/thread_bits.h
new file mode 100644
index 0000000..0d05d16
--- /dev/null
+++ b/include/linux/thread_bits.h
@@ -0,0 +1,55 @@
+
+/* thread_bits.h: common low-level thread bits accessors */
+
+#ifndef _LINUX_THREAD_BITS_H
+#define _LINUX_THREAD_BITS_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/bitops.h>
+#include <asm/thread_info.h>
+
+/*
+ * flag set/clear/test wrappers
+ * - pass TIF_xxxx constants to these functions
+ */
+
+static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
+{
+ set_bit(flag, (unsigned long *)&ti->flags);
+}
+
+static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
+{
+ clear_bit(flag, (unsigned long *)&ti->flags);
+}
+
+static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
+{
+ return test_and_set_bit(flag, (unsigned long *)&ti->flags);
+}
+
+static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
+{
+ return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
+}
+
+static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
+{
+ return test_bit(flag, (unsigned long *)&ti->flags);
+}
+
+#define set_thread_flag(flag) \
+ set_ti_thread_flag(current_thread_info(), flag)
+#define clear_thread_flag(flag) \
+ clear_ti_thread_flag(current_thread_info(), flag)
+#define test_and_set_thread_flag(flag) \
+ test_and_set_ti_thread_flag(current_thread_info(), flag)
+#define test_and_clear_thread_flag(flag) \
+ test_and_clear_ti_thread_flag(current_thread_info(), flag)
+#define test_thread_flag(flag) \
+ test_ti_thread_flag(current_thread_info(), flag)
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _LINUX_THREAD_BITS_H */
+
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index b4c2a48..b094aed 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -50,8 +50,7 @@ struct restart_block {
 
 extern long do_no_restart_syscall(struct restart_block *parm);
 
-#include <linux/bitops.h>
-#include <asm/thread_info.h>
+#include <linux/thread_bits.h>
 
 #ifdef __KERNEL__
 
@@ -62,47 +61,6 @@ extern long do_no_restart_syscall(struct restart_block *parm);
 # define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK)
 #endif
 
-/*
- * flag set/clear/test wrappers
- * - pass TIF_xxxx constants to these functions
- */
-
-static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
-{
- set_bit(flag, (unsigned long *)&ti->flags);
-}
-
-static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
-{
- clear_bit(flag, (unsigned long *)&ti->flags);
-}
-
-static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
-{
- return test_and_set_bit(flag, (unsigned long *)&ti->flags);
-}
-
-static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
-{
- return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
-}
-
-static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
-{
- return test_bit(flag, (unsigned long *)&ti->flags);
-}
-
-#define set_thread_flag(flag) \
- set_ti_thread_flag(current_thread_info(), flag)
-#define clear_thread_flag(flag) \
- clear_ti_thread_flag(current_thread_info(), flag)
-#define test_and_set_thread_flag(flag) \
- test_and_set_ti_thread_flag(current_thread_info(), flag)
-#define test_and_clear_thread_flag(flag) \
- test_and_clear_ti_thread_flag(current_thread_info(), flag)
-#define test_thread_flag(flag) \
- test_ti_thread_flag(current_thread_info(), flag)
-
 #define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED)
 
 #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
--
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[PATCH 16/23] arm64: ilp32: introduce binfmt_ilp32.c

Yury Norov-2
In reply to this post by Yury Norov-2
to handle ILP32 binaries

Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/kernel/Makefile       |  1 +
 arch/arm64/kernel/binfmt_ilp32.c | 91 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+)
 create mode 100644 arch/arm64/kernel/binfmt_ilp32.c

diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 6bc9738..9dfdf86 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -28,6 +28,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \
    sys_compat.o entry32.o \
    ../../arm/kernel/opcodes.o binfmt_elf32.o
+arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o
 arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
 arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
 arm64-obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o
diff --git a/arch/arm64/kernel/binfmt_ilp32.c b/arch/arm64/kernel/binfmt_ilp32.c
new file mode 100644
index 0000000..a934fd4
--- /dev/null
+++ b/arch/arm64/kernel/binfmt_ilp32.c
@@ -0,0 +1,91 @@
+/*
+ * Support for ILP32 Linux/aarch64 ELF binaries.
+ */
+
+#include <linux/elfcore-compat.h>
+#include <linux/time.h>
+
+#undef ELF_CLASS
+#define ELF_CLASS ELFCLASS32
+
+#undef elfhdr
+#undef elf_phdr
+#undef elf_shdr
+#undef elf_note
+#undef elf_addr_t
+#define elfhdr elf32_hdr
+#define elf_phdr elf32_phdr
+#define elf_shdr elf32_shdr
+#define elf_note elf32_note
+#define elf_addr_t Elf32_Addr
+
+/*
+ * Some data types as stored in coredump.
+ */
+#define user_long_t compat_long_t
+#define user_siginfo_t compat_siginfo_t
+#define copy_siginfo_to_user copy_siginfo_to_user32
+
+/*
+ * The machine-dependent core note format types are defined in elfcore-compat.h,
+ * which requires asm/elf.h to define compat_elf_gregset_t et al.
+ */
+#define elf_prstatus compat_elf_prstatus
+#define elf_prpsinfo compat_elf_prpsinfo
+
+/*
+ * Compat version of cputime_to_compat_timeval, perhaps this
+ * should be an inline in <linux/compat.h>.
+ */
+static void cputime_to_compat_timeval(const cputime_t cputime,
+      struct compat_timeval *value)
+{
+ struct timeval tv;
+ cputime_to_timeval(cputime, &tv);
+ value->tv_sec = tv.tv_sec;
+ value->tv_usec = tv.tv_usec;
+}
+
+#undef cputime_to_timeval
+#define cputime_to_timeval cputime_to_compat_timeval
+
+/* AARCH64 ILP32 EABI. */
+#undef elf_check_arch
+#define elf_check_arch(x) (((x)->e_machine == EM_AARCH64) \
+ && (x)->e_ident[EI_CLASS] == ELFCLASS32)
+
+#undef SET_PERSONALITY
+#define SET_PERSONALITY(ex) \
+do { \
+ set_thread_flag(TIF_32BIT_AARCH64); \
+ clear_thread_flag(TIF_32BIT); \
+} while (0)
+
+#undef ARCH_DLINFO
+#define ARCH_DLINFO \
+do { \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, \
+    (elf_addr_t)(long)current->mm->context.vdso); \
+} while (0)
+
+#ifdef __AARCH64EB__
+#define COMPAT_ELF_PLATFORM ("aarch64_be:ilp32")
+#else
+#define COMPAT_ELF_PLATFORM ("aarch64:ilp32")
+#endif
+
+#undef ELF_HWCAP
+#undef ELF_HWCAP2
+#define ELF_HWCAP ((u32) elf_hwcap)
+#define ELF_HWCAP2 ((u32) (elf_hwcap >> 32))
+
+/*
+ * Rename a few of the symbols that binfmt_elf.c will define.
+ * These are all local so the names don't really matter, but it
+ * might make some debugging less confusing not to duplicate them.
+ */
+#define elf_format compat_elf_format
+#define init_elf_binfmt init_compat_elf_binfmt
+#define exit_elf_binfmt exit_compat_elf_binfmt
+
+#include "../../../fs/binfmt_elf.c"
--
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[PATCH 19/23] arm64: signal: share lp64 signal routines to ilp32

Yury Norov-2
In reply to this post by Yury Norov-2
After that, it will be possible to reuse it in ilp32.

Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/include/asm/signal_common.h | 33 ++++++++++++
 arch/arm64/kernel/signal.c             | 91 +++++++++++++++++++++-------------
 2 files changed, 90 insertions(+), 34 deletions(-)
 create mode 100644 arch/arm64/include/asm/signal_common.h

diff --git a/arch/arm64/include/asm/signal_common.h b/arch/arm64/include/asm/signal_common.h
new file mode 100644
index 0000000..756ed2c
--- /dev/null
+++ b/arch/arm64/include/asm/signal_common.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 1995-2009 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ * Copyright (C) 2016 Cavium Networks.
+ *
+ * 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_SIGNAL_COMMON_H
+#define __ASM_SIGNAL_COMMON_H
+
+#include <linux/uaccess.h>
+#include <asm/ucontext.h>
+#include <asm/fpsimd.h>
+
+int preserve_fpsimd_context(struct fpsimd_context __user *ctx);
+int restore_fpsimd_context(struct fpsimd_context __user *ctx);
+int setup_sigcontext(struct sigcontext __user *uc_mcontext, struct pt_regs *regs);
+int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sf);
+void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
+ void __user *frame, off_t sigframe_off, int usig);
+
+#endif /* __ASM_SIGNAL_COMMON_H */
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index be02f65..f9fbf8a 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -34,18 +34,23 @@
 #include <asm/fpsimd.h>
 #include <asm/signal32.h>
 #include <asm/vdso.h>
+#include <asm/signal_common.h>
+
+struct sigframe {
+ struct ucontext uc;
+ u64 fp;
+ u64 lr;
+};
 
 /*
  * Do a signal return; undo the signal stack. These are aligned to 128-bit.
  */
 struct rt_sigframe {
  struct siginfo info;
- struct ucontext uc;
- u64 fp;
- u64 lr;
+ struct sigframe sig;
 };
 
-static int preserve_fpsimd_context(struct fpsimd_context __user *ctx)
+int preserve_fpsimd_context(struct fpsimd_context __user *ctx)
 {
  struct fpsimd_state *fpsimd = &current->thread.fpsimd_state;
  int err;
@@ -65,7 +70,7 @@ static int preserve_fpsimd_context(struct fpsimd_context __user *ctx)
  return err ? -EFAULT : 0;
 }
 
-static int restore_fpsimd_context(struct fpsimd_context __user *ctx)
+int restore_fpsimd_context(struct fpsimd_context __user *ctx)
 {
  struct fpsimd_state fpsimd;
  __u32 magic, size;
@@ -93,22 +98,30 @@ static int restore_fpsimd_context(struct fpsimd_context __user *ctx)
 }
 
 static int restore_sigframe(struct pt_regs *regs,
-    struct rt_sigframe __user *sf)
+    struct sigframe __user *sf)
 {
  sigset_t set;
- int i, err;
- void *aux = sf->uc.uc_mcontext.__reserved;
-
+ int err;
  err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
  if (err == 0)
  set_current_blocked(&set);
 
+ err |= restore_sigcontext(regs, &sf->uc.uc_mcontext);
+ return err;
+}
+
+
+int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *uc_mcontext)
+{
+ int i, err = 0;
+ void *aux = uc_mcontext->__reserved;
+
  for (i = 0; i < 31; i++)
- __get_user_error(regs->regs[i], &sf->uc.uc_mcontext.regs[i],
+ __get_user_error(regs->regs[i], &uc_mcontext->regs[i],
  err);
- __get_user_error(regs->sp, &sf->uc.uc_mcontext.sp, err);
- __get_user_error(regs->pc, &sf->uc.uc_mcontext.pc, err);
- __get_user_error(regs->pstate, &sf->uc.uc_mcontext.pstate, err);
+ __get_user_error(regs->sp, &uc_mcontext->sp, err);
+ __get_user_error(regs->pc, &uc_mcontext->pc, err);
+ __get_user_error(regs->pstate, &uc_mcontext->pstate, err);
 
  /*
  * Avoid sys_rt_sigreturn() restarting.
@@ -145,10 +158,10 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
  if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
  goto badframe;
 
- if (restore_sigframe(regs, frame))
+ if (restore_sigframe(regs, &frame->sig))
  goto badframe;
 
- if (restore_altstack(&frame->uc.uc_stack))
+ if (restore_altstack(&frame->sig.uc.uc_stack))
  goto badframe;
 
  return regs->regs[0];
@@ -162,27 +175,36 @@ badframe:
  return 0;
 }
 
-static int setup_sigframe(struct rt_sigframe __user *sf,
+static int setup_sigframe(struct sigframe __user *sf,
   struct pt_regs *regs, sigset_t *set)
 {
- int i, err = 0;
- void *aux = sf->uc.uc_mcontext.__reserved;
- struct _aarch64_ctx *end;
+ int err = 0;
 
  /* set up the stack frame for unwinding */
  __put_user_error(regs->regs[29], &sf->fp, err);
  __put_user_error(regs->regs[30], &sf->lr, err);
+ err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
+ err |= setup_sigcontext(&sf->uc.uc_mcontext, regs);
+
+ return err;
+}
+
+int setup_sigcontext(struct sigcontext __user *uc_mcontext,
+ struct pt_regs *regs)
+{
+ void *aux = uc_mcontext->__reserved;
+ struct _aarch64_ctx *end;
+ int i, err = 0;
 
  for (i = 0; i < 31; i++)
- __put_user_error(regs->regs[i], &sf->uc.uc_mcontext.regs[i],
+ __put_user_error(regs->regs[i], &uc_mcontext->regs[i],
  err);
- __put_user_error(regs->sp, &sf->uc.uc_mcontext.sp, err);
- __put_user_error(regs->pc, &sf->uc.uc_mcontext.pc, err);
- __put_user_error(regs->pstate, &sf->uc.uc_mcontext.pstate, err);
 
- __put_user_error(current->thread.fault_address, &sf->uc.uc_mcontext.fault_address, err);
+ __put_user_error(regs->sp, &uc_mcontext->sp, err);
+ __put_user_error(regs->pc, &uc_mcontext->pc, err);
+ __put_user_error(regs->pstate, &uc_mcontext->pstate, err);
 
- err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
+ __put_user_error(current->thread.fault_address, &uc_mcontext->fault_address, err);
 
  if (err == 0) {
  struct fpsimd_context *fpsimd_ctx =
@@ -229,14 +251,14 @@ static struct rt_sigframe __user *get_sigframe(struct ksignal *ksig,
  return frame;
 }
 
-static void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
- void __user *frame, int usig)
+void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
+ void __user *frame, off_t sigframe_off, int usig)
 {
  __sigrestore_t sigtramp;
 
  regs->regs[0] = usig;
  regs->sp = (unsigned long)frame;
- regs->regs[29] = regs->sp + offsetof(struct rt_sigframe, fp);
+ regs->regs[29] = regs->sp + sigframe_off + offsetof(struct sigframe, fp);
  regs->pc = (unsigned long)ka->sa.sa_handler;
 
  if (ka->sa.sa_flags & SA_RESTORER)
@@ -257,17 +279,18 @@ static int setup_rt_frame(int usig, struct ksignal *ksig, sigset_t *set,
  if (!frame)
  return 1;
 
- __put_user_error(0, &frame->uc.uc_flags, err);
- __put_user_error(NULL, &frame->uc.uc_link, err);
+ __put_user_error(0, &frame->sig.uc.uc_flags, err);
+ __put_user_error(NULL, &frame->sig.uc.uc_link, err);
 
- err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
- err |= setup_sigframe(frame, regs, set);
+ err |= __save_altstack(&frame->sig.uc.uc_stack, regs->sp);
+ err |= setup_sigframe(&frame->sig, regs, set);
  if (err == 0) {
- setup_return(regs, &ksig->ka, frame, usig);
+ setup_return(regs, &ksig->ka, frame,
+ offsetof(struct rt_sigframe, sig), usig);
  if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
  err |= copy_siginfo_to_user(&frame->info, &ksig->info);
  regs->regs[1] = (unsigned long)&frame->info;
- regs->regs[2] = (unsigned long)&frame->uc;
+ regs->regs[2] = (unsigned long)&frame->sig.uc;
  }
  }
 
--
2.5.0

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[PATCH 22/23] arm64:ilp32: add vdso-ilp32 and use for signal return

Yury Norov-2
In reply to this post by Yury Norov-2
From: Philipp Tomsich <[hidden email]>

ILP32 VDSO exports next symbols:
 __kernel_rt_sigreturn;
 __kernel_gettimeofday;
 __kernel_clock_gettime;
 __kernel_clock_getres;

What shared object to use, kernel selects depending on result of
is_ilp32_compat_task() in arch/arm64/kernel/vdso.c, so it substitutes
correct pages and spec.

Adjusted to move the move data page before code pages in sync with
commit 601255ae3c98fdeeee3a8bb4696425e4f868b4f1

Signed-off-by: Philipp Tomsich <[hidden email]>
Signed-off-by: Christoph Muellner <[hidden email]>
Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/include/asm/vdso.h                 |  6 ++
 arch/arm64/kernel/Makefile                    |  7 ++
 arch/arm64/kernel/asm-offsets.c               |  7 ++
 arch/arm64/kernel/signal.c                    |  2 +
 arch/arm64/kernel/vdso-ilp32/.gitignore       |  2 +
 arch/arm64/kernel/vdso-ilp32/Makefile         | 74 +++++++++++++++++++++
 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S     | 33 ++++++++++
 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S | 95 +++++++++++++++++++++++++++
 arch/arm64/kernel/vdso.c                      | 61 ++++++++++++++---
 arch/arm64/kernel/vdso/gettimeofday.S         | 20 +++++-
 10 files changed, 294 insertions(+), 13 deletions(-)
 create mode 100644 arch/arm64/kernel/vdso-ilp32/.gitignore
 create mode 100644 arch/arm64/kernel/vdso-ilp32/Makefile
 create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S
 create mode 100644 arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S

diff --git a/arch/arm64/include/asm/vdso.h b/arch/arm64/include/asm/vdso.h
index 839ce00..649a9a4 100644
--- a/arch/arm64/include/asm/vdso.h
+++ b/arch/arm64/include/asm/vdso.h
@@ -29,6 +29,12 @@
 
 #include <generated/vdso-offsets.h>
 
+#ifdef CONFIG_ARM64_ILP32
+#include <generated/vdso-ilp32-offsets.h>
+#else
+#define vdso_offset_sigtramp_ilp32
+#endif
+
 #define VDSO_SYMBOL(base, name)   \
 ({   \
  (void *)(vdso_offset_##name - VDSO_LBASE + (unsigned long)(base)); \
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 09e4373..e98add5 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -50,6 +50,7 @@ arm64-obj-$(CONFIG_PARAVIRT) += paravirt.o
 arm64-obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
 
 obj-y += $(arm64-obj-y) vdso/
+obj-$(CONFIG_ARM64_ILP32) += vdso-ilp32/
 obj-m += $(arm64-obj-m)
 head-y := head.o
 extra-y += $(head-y) vmlinux.lds
@@ -57,3 +58,9 @@ extra-y += $(head-y) vmlinux.lds
 # vDSO - this must be built first to generate the symbol offsets
 $(call objectify,$(arm64-obj-y)): $(obj)/vdso/vdso-offsets.h
 $(obj)/vdso/vdso-offsets.h: $(obj)/vdso
+
+ifeq ($(CONFIG_ARM64_ILP32),y)
+# vDSO - this must be built first to generate the symbol offsets
+$(call objectify,$(arm64-obj-y)): $(obj)/vdso-ilp32/vdso-ilp32-offsets.h
+$(obj)/vdso-ilp32/vdso-ilp32-offsets.h: $(obj)/vdso-ilp32
+endif
diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
index e229525..af69b81 100644
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -101,6 +101,13 @@ int main(void)
   DEFINE(TSPEC_TV_SEC, offsetof(struct timespec, tv_sec));
   DEFINE(TSPEC_TV_NSEC, offsetof(struct timespec, tv_nsec));
   BLANK();
+#ifdef CONFIG_COMPAT
+  DEFINE(COMPAT_TVAL_TV_SEC, offsetof(struct compat_timeval, tv_sec));
+  DEFINE(COMPAT_TVAL_TV_USEC, offsetof(struct compat_timeval, tv_usec));
+  DEFINE(COMPAT_TSPEC_TV_SEC, offsetof(struct compat_timespec, tv_sec));
+  DEFINE(COMPAT_TSPEC_TV_NSEC, offsetof(struct compat_timespec, tv_nsec));
+  BLANK();
+#endif
   DEFINE(TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
   DEFINE(TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
   BLANK();
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index 45bcd96..933cdcf 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -264,6 +264,8 @@ void setup_return(struct pt_regs *regs, struct k_sigaction *ka,
 
  if (ka->sa.sa_flags & SA_RESTORER)
  sigtramp = ka->sa.sa_restorer;
+ else if (is_ilp32_compat_task())
+ sigtramp = VDSO_SYMBOL(current->mm->context.vdso, sigtramp_ilp32);
  else
  sigtramp = VDSO_SYMBOL(current->mm->context.vdso, sigtramp);
 
diff --git a/arch/arm64/kernel/vdso-ilp32/.gitignore b/arch/arm64/kernel/vdso-ilp32/.gitignore
new file mode 100644
index 0000000..61806c3
--- /dev/null
+++ b/arch/arm64/kernel/vdso-ilp32/.gitignore
@@ -0,0 +1,2 @@
+vdso-ilp32.lds
+vdso-ilp32-offsets.h
diff --git a/arch/arm64/kernel/vdso-ilp32/Makefile b/arch/arm64/kernel/vdso-ilp32/Makefile
new file mode 100644
index 0000000..0671e88
--- /dev/null
+++ b/arch/arm64/kernel/vdso-ilp32/Makefile
@@ -0,0 +1,74 @@
+#
+# Building a vDSO image for AArch64.
+#
+# Author: Will Deacon <[hidden email]>
+# Heavily based on the vDSO Makefiles for other archs.
+#
+
+obj-ilp32-vdso := gettimeofday-ilp32.o note-ilp32.o sigreturn-ilp32.o
+
+# Build rules
+targets := $(obj-ilp32-vdso) vdso-ilp32.so vdso-ilp32.so.dbg
+obj-ilp32-vdso := $(addprefix $(obj)/, $(obj-ilp32-vdso))
+
+ccflags-y := -shared -fno-common -fno-builtin
+ccflags-y += -nostdlib -Wl,-soname=linux-ilp32-vdso.so.1 \
+ $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
+
+obj-y += vdso-ilp32.o
+extra-y += vdso-ilp32.lds vdso-ilp32-offsets.h
+CPPFLAGS_vdso-ilp32.lds += -P -C -U$(ARCH) -mabi=ilp32
+
+# Force dependency (incbin is bad)
+$(obj)/vdso-ilp32.o : $(obj)/vdso-ilp32.so
+
+# Link rule for the .so file, .lds has to be first
+$(obj)/vdso-ilp32.so.dbg: $(src)/vdso-ilp32.lds $(obj-ilp32-vdso)
+ $(call if_changed,vdso-ilp32ld)
+
+# Strip rule for the .so file
+$(obj)/%.so: OBJCOPYFLAGS := -S
+$(obj)/%.so: $(obj)/%.so.dbg FORCE
+ $(call if_changed,objcopy)
+
+# Generate VDSO offsets using helper script
+gen-vdsosym := $(srctree)/$(src)/../vdso/gen_vdso_offsets.sh
+quiet_cmd_vdsosym = VDSOSYM $@
+define cmd_vdsosym
+ $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ && \
+ cp $@ include/generated/
+endef
+
+$(obj)/vdso-ilp32-offsets.h: $(obj)/vdso-ilp32.so.dbg FORCE
+ $(call if_changed,vdsosym)
+
+# Assembly rules for the .S files
+#$(obj-ilp32-vdso): %.o: $(src)/../vdso/$(subst -ilp32,,%.S)
+# $(call if_changed_dep,vdso-ilp32as)
+
+$(obj)/gettimeofday-ilp32.o: $(src)/../vdso/gettimeofday.S
+ $(call if_changed_dep,vdso-ilp32as)
+
+$(obj)/note-ilp32.o: $(src)/../vdso/note.S
+ $(call if_changed_dep,vdso-ilp32as)
+
+# This one should be fine because ILP32 uses the same generic
+# __NR_rt_sigreturn syscall number.
+$(obj)/sigreturn-ilp32.o: $(src)/../vdso/sigreturn.S
+ $(call if_changed_dep,vdso-ilp32as)
+
+# Actual build commands
+quiet_cmd_vdso-ilp32ld = VDSOILP32L $@
+      cmd_vdso-ilp32ld = $(CC) $(c_flags) -mabi=ilp32  -Wl,-n -Wl,-T $^ -o $@
+quiet_cmd_vdso-ilp32as = VDSOILP32A $@
+      cmd_vdso-ilp32as = $(CC) $(a_flags) -mabi=ilp32 -c -o $@ $<
+
+# Install commands for the unstripped file
+quiet_cmd_vdso_install = INSTALL $@
+      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
+
+vdso-ilp32.so: $(obj)/vdso-ilp32.so.dbg
+ @mkdir -p $(MODLIB)/vdso
+ $(call cmd,vdso_install)
+
+vdso_install: vdso-ilp32.so
diff --git a/arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S b/arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S
new file mode 100644
index 0000000..46ac072
--- /dev/null
+++ b/arch/arm64/kernel/vdso-ilp32/vdso-ilp32.S
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2012 ARM Limited
+ *
+ * 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/>.
+ *
+ * Author: Will Deacon <[hidden email]>
+ */
+
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/const.h>
+#include <asm/page.h>
+
+ __PAGE_ALIGNED_DATA
+
+ .globl vdso_ilp32_start, vdso_ilp32_end
+ .balign PAGE_SIZE
+vdso_ilp32_start:
+ .incbin "arch/arm64/kernel/vdso-ilp32/vdso-ilp32.so"
+ .balign PAGE_SIZE
+vdso_ilp32_end:
+
+ .previous
diff --git a/arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S b/arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S
new file mode 100644
index 0000000..1dde31f
--- /dev/null
+++ b/arch/arm64/kernel/vdso-ilp32/vdso-ilp32.lds.S
@@ -0,0 +1,95 @@
+/*
+ * GNU linker script for the VDSO library.
+ *
+ * Copyright (C) 2012 ARM Limited
+ *
+ * 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/>.
+ *
+ * Author: Will Deacon <[hidden email]>
+ * Heavily based on the vDSO linker scripts for other archs.
+ */
+
+#include <linux/const.h>
+#include <asm/page.h>
+#include <asm/vdso.h>
+
+SECTIONS
+{
+ PROVIDE(_vdso_data = . - PAGE_SIZE);
+ . = VDSO_LBASE + SIZEOF_HEADERS;
+
+ .hash : { *(.hash) } :text
+ .gnu.hash : { *(.gnu.hash) }
+ .dynsym : { *(.dynsym) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+
+ .note : { *(.note.*) } :text :note
+
+ . = ALIGN(16);
+
+ .text : { *(.text*) } :text =0xd503201f
+ PROVIDE (__etext = .);
+ PROVIDE (_etext = .);
+ PROVIDE (etext = .);
+
+ .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
+ .eh_frame : { KEEP (*(.eh_frame)) } :text
+
+ .dynamic : { *(.dynamic) } :text :dynamic
+
+ .rodata : { *(.rodata*) } :text
+
+ _end = .;
+ PROVIDE(end = .);
+
+ /DISCARD/ : {
+ *(.note.GNU-stack)
+ *(.data .data.* .gnu.linkonce.d.* .sdata*)
+ *(.bss .sbss .dynbss .dynsbss)
+ }
+}
+
+/*
+ * We must supply the ELF program headers explicitly to get just one
+ * PT_LOAD segment, and set the flags explicitly to make segments read-only.
+ */
+PHDRS
+{
+ text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
+ dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
+ note PT_NOTE FLAGS(4); /* PF_R */
+ eh_frame_hdr PT_GNU_EH_FRAME;
+}
+
+/*
+ * This controls what symbols we export from the DSO.
+ */
+VERSION
+{
+ LINUX_4.6 {
+ global:
+ __kernel_rt_sigreturn;
+ __kernel_gettimeofday;
+ __kernel_clock_gettime;
+ __kernel_clock_getres;
+ local: *;
+ };
+}
+
+/*
+ * Make the sigreturn code visible to the kernel.
+ */
+VDSO_sigtramp_ilp32 = __kernel_rt_sigreturn;
diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
index 26352a6..521a8e4 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -40,6 +40,12 @@ extern char vdso_start, vdso_end;
 static unsigned long vdso_pages;
 static struct page **vdso_pagelist;
 
+#ifdef CONFIG_ARM64_ILP32
+extern char vdso_ilp32_start, vdso_ilp32_end;
+static unsigned long vdso_ilp32_pages;
+static struct page **vdso_ilp32_pagelist;
+#endif
+
 /*
  * The vDSO data page.
  */
@@ -109,24 +115,29 @@ int aarch32_setup_vectors_page(struct linux_binprm *bprm, int uses_interp)
 }
 #endif /* CONFIG_AARCH32_EL0 */
 
-static struct vm_special_mapping vdso_spec[2];
-
-static int __init vdso_init(void)
+static int __init vdso_init_common(char *vdso_start, char *vdso_end,
+  unsigned long *vdso_pagesp,
+  struct page ***vdso_pagelistp,
+  struct vm_special_mapping* vdso_spec)
 {
  int i;
+ unsigned long vdso_pages;
+ struct page **vdso_pagelist;
 
- if (memcmp(&vdso_start, "\177ELF", 4)) {
+ if (memcmp(vdso_start, "\177ELF", 4)) {
  pr_err("vDSO is not a valid ELF object!\n");
  return -EINVAL;
  }
 
- vdso_pages = (&vdso_end - &vdso_start) >> PAGE_SHIFT;
+ vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
+ *vdso_pagesp = vdso_pages;
  pr_info("vdso: %ld pages (%ld code @ %p, %ld data @ %p)\n",
- vdso_pages + 1, vdso_pages, &vdso_start, 1L, vdso_data);
+ vdso_pages + 1, vdso_pages, vdso_start, 1L, vdso_data);
 
  /* Allocate the vDSO pagelist, plus a page for the data. */
  vdso_pagelist = kcalloc(vdso_pages + 1, sizeof(struct page *),
  GFP_KERNEL);
+ *vdso_pagelistp = vdso_pagelist;
  if (vdso_pagelist == NULL)
  return -ENOMEM;
 
@@ -135,7 +146,7 @@ static int __init vdso_init(void)
 
  /* Grab the vDSO code pages. */
  for (i = 0; i < vdso_pages; i++)
- vdso_pagelist[i + 1] = virt_to_page(&vdso_start + i * PAGE_SIZE);
+ vdso_pagelist[i + 1] = virt_to_page(vdso_start + i * PAGE_SIZE);
 
  /* Populate the special mapping structures */
  vdso_spec[0] = (struct vm_special_mapping) {
@@ -150,16 +161,46 @@ static int __init vdso_init(void)
 
  return 0;
 }
+
+static struct vm_special_mapping vdso_spec[2];
+
+static int __init vdso_init(void)
+{
+ return vdso_init_common(&vdso_start, &vdso_end,
+ &vdso_pages, &vdso_pagelist,
+ vdso_spec);
+}
 arch_initcall(vdso_init);
 
+#ifdef CONFIG_ARM64_ILP32
+static struct vm_special_mapping vdso_ilp32_spec[2];
+
+static int __init vdso_ilp32_init(void)
+{
+ return vdso_init_common(&vdso_ilp32_start, &vdso_ilp32_end,
+ &vdso_ilp32_pages, &vdso_ilp32_pagelist,
+ vdso_ilp32_spec);
+}
+arch_initcall(vdso_ilp32_init);
+#endif
+
 int arch_setup_additional_pages(struct linux_binprm *bprm,
  int uses_interp)
 {
  struct mm_struct *mm = current->mm;
  unsigned long vdso_base, vdso_text_len, vdso_mapping_len;
  void *ret;
+ unsigned long pages = vdso_pages;
+ struct vm_special_mapping *spec = vdso_spec;
+
+#ifdef CONFIG_ARM64_ILP32
+ if (is_ilp32_compat_task()) {
+        pages = vdso_ilp32_pages;
+        spec = vdso_ilp32_spec;
+ }
+#endif
 
- vdso_text_len = vdso_pages << PAGE_SHIFT;
+ vdso_text_len = pages << PAGE_SHIFT;
  /* Be sure to map the data page */
  vdso_mapping_len = vdso_text_len + PAGE_SIZE;
 
@@ -171,7 +212,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
  }
  ret = _install_special_mapping(mm, vdso_base, PAGE_SIZE,
        VM_READ|VM_MAYREAD,
-       &vdso_spec[0]);
+       &spec[0]);
  if (IS_ERR(ret))
  goto up_fail;
 
@@ -180,7 +221,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
  ret = _install_special_mapping(mm, vdso_base, vdso_text_len,
        VM_READ|VM_EXEC|
        VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
-       &vdso_spec[1]);
+       &spec[1]);
  if (IS_ERR(ret))
  goto up_fail;
 
diff --git a/arch/arm64/kernel/vdso/gettimeofday.S b/arch/arm64/kernel/vdso/gettimeofday.S
index efa79e8..a2d8a70 100644
--- a/arch/arm64/kernel/vdso/gettimeofday.S
+++ b/arch/arm64/kernel/vdso/gettimeofday.S
@@ -25,6 +25,16 @@
 #define NSEC_PER_SEC_LO16 0xca00
 #define NSEC_PER_SEC_HI16 0x3b9a
 
+#ifdef __LP64__
+#define PTR_REG(n) x##n
+#define OFFSET(n) n
+#define DELOUSE(n)
+#else
+#define PTR_REG(n) w##n
+#define OFFSET(n) COMPAT_##n
+#define DELOUSE(n) mov     w##n, w##n
+#endif
+
 vdso_data .req x6
 use_syscall .req w7
 seqcnt .req w8
@@ -51,6 +61,8 @@ seqcnt .req w8
 /* int __kernel_gettimeofday(struct timeval *tv, struct timezone *tz); */
 ENTRY(__kernel_gettimeofday)
  .cfi_startproc
+ DELOUSE(0)
+ DELOUSE(1)
  mov x2, x30
  .cfi_register x30, x2
 
@@ -68,7 +80,7 @@ ENTRY(__kernel_gettimeofday)
  mov x13, #1000
  lsl x13, x13, x12
  udiv x11, x11, x13
- stp x10, x11, [x0, #TVAL_TV_SEC]
+ stp PTR_REG(10), PTR_REG(11), [x0, #OFFSET(TVAL_TV_SEC)]
 2:
  /* If tz is NULL, return 0. */
  cbz x1, 3f
@@ -88,6 +100,7 @@ ENDPROC(__kernel_gettimeofday)
 /* int __kernel_clock_gettime(clockid_t clock_id, struct timespec *tp); */
 ENTRY(__kernel_clock_gettime)
  .cfi_startproc
+ DELOUSE(1)
  cmp w0, #CLOCK_REALTIME
  ccmp w0, #CLOCK_MONOTONIC, #0x4, ne
  b.ne 2f
@@ -159,7 +172,7 @@ ENTRY(__kernel_clock_gettime)
 
 6: /* Store to the user timespec. */
  lsr x11, x11, x12
- stp x10, x11, [x1, #TSPEC_TV_SEC]
+ stp PTR_REG(10), PTR_REG(11), [x1, #OFFSET(TSPEC_TV_SEC)]
  mov x0, xzr
  ret
 7:
@@ -174,6 +187,7 @@ ENDPROC(__kernel_clock_gettime)
 /* int __kernel_clock_getres(clockid_t clock_id, struct timespec *res); */
 ENTRY(__kernel_clock_getres)
  .cfi_startproc
+ DELOUSE(1)
  cmp w0, #CLOCK_REALTIME
  ccmp w0, #CLOCK_MONOTONIC, #0x4, ne
  b.ne 1f
@@ -187,7 +201,7 @@ ENTRY(__kernel_clock_getres)
  ldr x2, 6f
 2:
  cbz w1, 3f
- stp xzr, x2, [x1]
+ stp PTR_REG(zr), PTR_REG(2), [x1]
 
 3: /* res == NULL. */
  mov w0, wzr
--
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[PATCH 23/23] arm64:ilp32: add ARM64_ILP32 to Kconfig

Yury Norov-2
In reply to this post by Yury Norov-2
From: Andrew Pinski <[hidden email]>

This patch adds the config option for ILP32.

Signed-off-by: Andrew Pinski <[hidden email]>
Signed-off-by: Philipp Tomsich <[hidden email]>
Signed-off-by: Christoph Muellner <[hidden email]>
Signed-off-by: Yury Norov <[hidden email]>
Reviewed-by: David Daney <[hidden email]>
---
 arch/arm64/Kconfig | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0bb7adc..765d7c2 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -926,12 +926,13 @@ source "fs/Kconfig.binfmt"
 
 config COMPAT
  bool
- depends on AARCH32_EL0
+ depends on AARCH32_EL0 || ARM64_ILP32
 
 config AARCH32_EL0
  bool "Kernel support for 32-bit EL0"
  def_bool y
  depends on ARM64_4K_PAGES || EXPERT
+ select COMPAT
  select HAVE_UID16
  select OLD_SIGSUSPEND3
  select COMPAT_OLD_SIGACTION
@@ -947,6 +948,15 @@ config AARCH32_EL0
 
   If you want to execute 32-bit userspace applications, say Y.
 
+config ARM64_ILP32
+ bool "Kernel support for ILP32"
+ select COMPAT
+ select COMPAT_WRAPPER
+ help
+  This option enables support for AArch64 ILP32 user space.  ILP32
+  is an ABI where long and pointers are 32bits but it uses the AARCH64
+  instruction set.
+
 config SYSVIPC_COMPAT
  def_bool y
  depends on COMPAT && SYSVIPC
--
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[PATCH 21/23] arm64: ilp32: introduce ilp32-specific handlers for sigframe and ucontext

Yury Norov-2
In reply to this post by Yury Norov-2
From: Andrew Pinski <[hidden email]>

ILP32 uses AARCH32 compat structures and syscall handlers for signals.
But ILP32 struct rt_sigframe  and ucontext differs from both LP64 and
AARCH32. So some specific mechanism is needed to take care of it.

Signed-off-by: Andrew Pinski <[hidden email]>
Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/include/asm/signal_ilp32.h |  34 ++++++
 arch/arm64/kernel/Makefile            |   3 +-
 arch/arm64/kernel/entry_ilp32.S       |  23 ++++
 arch/arm64/kernel/signal.c            |   3 +
 arch/arm64/kernel/signal_ilp32.c      | 192 ++++++++++++++++++++++++++++++++++
 arch/arm64/kernel/sys_ilp32.c         |   3 +
 6 files changed, 257 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/include/asm/signal_ilp32.h
 create mode 100644 arch/arm64/kernel/entry_ilp32.S
 create mode 100644 arch/arm64/kernel/signal_ilp32.c

diff --git a/arch/arm64/include/asm/signal_ilp32.h b/arch/arm64/include/asm/signal_ilp32.h
new file mode 100644
index 0000000..30eff23
--- /dev/null
+++ b/arch/arm64/include/asm/signal_ilp32.h
@@ -0,0 +1,34 @@
+/*
+ * 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_SIGNAL_ILP32_H
+#define __ASM_SIGNAL_ILP32_H
+
+#ifdef CONFIG_ARM64_ILP32
+
+#include <linux/compat.h>
+
+int ilp32_setup_rt_frame(int usig, struct ksignal *ksig, sigset_t *set,
+  struct pt_regs *regs);
+
+#else
+
+static inline int ilp32_setup_rt_frame(int usig, struct ksignal *ksig, sigset_t *set,
+  struct pt_regs *regs)
+{
+ return -ENOSYS;
+}
+
+#endif /* CONFIG_ARM64_ILP32 */
+
+#endif /* __ASM_SIGNAL_ILP32_H */
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 3ed55eb..09e4373 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -28,7 +28,8 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \
    sys_compat.o entry32.o \
    ../../arm/kernel/opcodes.o binfmt_elf32.o
-arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o sys_ilp32.o
+arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o sys_ilp32.o \
+   signal_ilp32.o entry_ilp32.o
 arm64-obj-$(CONFIG_COMPAT) += signal32_common.o
 arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
 arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
diff --git a/arch/arm64/kernel/entry_ilp32.S b/arch/arm64/kernel/entry_ilp32.S
new file mode 100644
index 0000000..5063172
--- /dev/null
+++ b/arch/arm64/kernel/entry_ilp32.S
@@ -0,0 +1,23 @@
+/*
+ * ILP32 system call wrappers
+ *
+ * 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>
+
+ENTRY(ilp32_sys_rt_sigreturn_wrapper)
+ mov x0, sp
+ b ilp32_sys_rt_sigreturn
+ENDPROC(ilp32_sys_rt_sigreturn_wrapper)
+
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index f9fbf8a..45bcd96 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -35,6 +35,7 @@
 #include <asm/signal32.h>
 #include <asm/vdso.h>
 #include <asm/signal_common.h>
+#include <asm/signal_ilp32.h>
 
 struct sigframe {
  struct ucontext uc;
@@ -323,6 +324,8 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
  ret = compat_setup_rt_frame(usig, ksig, oldset, regs);
  else
  ret = compat_setup_frame(usig, ksig, oldset, regs);
+ } else if (is_ilp32_compat_task()) {
+ ret = ilp32_setup_rt_frame(usig, ksig, oldset, regs);
  } else {
  ret = setup_rt_frame(usig, ksig, oldset, regs);
  }
diff --git a/arch/arm64/kernel/signal_ilp32.c b/arch/arm64/kernel/signal_ilp32.c
new file mode 100644
index 0000000..841e8f8
--- /dev/null
+++ b/arch/arm64/kernel/signal_ilp32.c
@@ -0,0 +1,192 @@
+/*
+ * Based on arch/arm/kernel/signal.c
+ *
+ * Copyright (C) 1995-2009 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ * Copyright (C) 2016 Cavium Networks.
+ * Yury Norov <[hidden email]>
+ *
+ * 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/compat.h>
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+#include <linux/ratelimit.h>
+
+#include <asm/esr.h>
+#include <asm/fpsimd.h>
+#include <asm/signal32_common.h>
+#include <asm/signal_common.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+#include <asm/ucontext.h>
+
+
+struct ilp32_ucontext {
+        u32 uc_flags;
+        u32 uc_link;
+        compat_stack_t  uc_stack;
+        compat_sigset_t uc_sigmask;
+        /* glibc uses a 1024-bit sigset_t */
+        __u8            __unused[1024 / 8 - sizeof(compat_sigset_t)];
+        /* last for future expansion */
+        struct sigcontext uc_mcontext;
+};
+
+struct ilp32_sigframe {
+ struct ilp32_ucontext uc;
+ u64 fp;
+ u64 lr;
+};
+
+struct ilp32_rt_sigframe {
+ struct compat_siginfo info;
+ struct ilp32_sigframe sig;
+};
+
+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;
+}
+
+static int restore_ilp32_sigframe(struct pt_regs *regs,
+                            struct ilp32_sigframe __user *sf)
+{
+ sigset_t set;
+ int err;
+ err = get_sigset_t(&set, &sf->uc.uc_sigmask);
+ if (err == 0)
+ set_current_blocked(&set);
+ err |= restore_sigcontext(regs, &sf->uc.uc_mcontext);
+ return err;
+}
+
+static int setup_ilp32_sigframe(struct ilp32_sigframe __user *sf,
+                          struct pt_regs *regs, sigset_t *set)
+{
+ int err = 0;
+ /* set up the stack frame for unwinding */
+ __put_user_error(regs->regs[29], &sf->fp, err);
+ __put_user_error(regs->regs[30], &sf->lr, err);
+
+ err |= put_sigset_t(&sf->uc.uc_sigmask, set);
+ err |= setup_sigcontext(&sf->uc.uc_mcontext, regs);
+ return err;
+}
+
+asmlinkage long ilp32_sys_rt_sigreturn(struct pt_regs *regs)
+{
+ struct ilp32_rt_sigframe __user *frame;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current->restart_block.fn = do_no_restart_syscall;
+
+ /*
+ * Since we stacked the signal on a 128-bit boundary,
+ * then 'sp' should be word aligned here.  If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (regs->sp & 15)
+ goto badframe;
+
+ frame = (struct ilp32_rt_sigframe __user *)regs->sp;
+
+ if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+
+ if (restore_ilp32_sigframe(regs, &frame->sig))
+ goto badframe;
+
+ if (compat_restore_altstack(&frame->sig.uc.uc_stack))
+ 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->compat_sp);
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+static struct ilp32_rt_sigframe __user *ilp32_get_sigframe(struct ksignal *ksig,
+       struct pt_regs *regs)
+{
+ unsigned long sp, sp_top;
+ struct ilp32_rt_sigframe __user *frame;
+
+ sp = sp_top = sigsp(regs->sp, ksig);
+
+ sp = (sp - sizeof(struct ilp32_rt_sigframe)) & ~15;
+ frame = (struct ilp32_rt_sigframe __user *)sp;
+
+ /*
+ * Check that we can actually write to the signal frame.
+ */
+ if (!access_ok(VERIFY_WRITE, frame, sp_top - sp))
+ frame = NULL;
+
+ return frame;
+}
+
+/*
+ * ILP32 signal handling routines called from signal.c
+ */
+int ilp32_setup_rt_frame(int usig, struct ksignal *ksig,
+  sigset_t *set, struct pt_regs *regs)
+{
+ struct ilp32_rt_sigframe __user *frame;
+ int err = 0;
+
+ frame = ilp32_get_sigframe(ksig, regs);
+
+ if (!frame)
+ return 1;
+
+ err |= copy_siginfo_to_user32(&frame->info, &ksig->info);
+
+ __put_user_error(0, &frame->sig.uc.uc_flags, err);
+ __put_user_error(0, &frame->sig.uc.uc_link, err);
+
+ err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->sp);
+ err |= setup_ilp32_sigframe(&frame->sig, regs, set);
+ if (err == 0) {
+ setup_return(regs, &ksig->ka, frame,
+ offsetof(struct ilp32_rt_sigframe, sig), usig);
+ regs->regs[1] = (unsigned long)&frame->info;
+ regs->regs[2] = (unsigned long)&frame->sig.uc;
+ }
+
+ return err;
+}
+
diff --git a/arch/arm64/kernel/sys_ilp32.c b/arch/arm64/kernel/sys_ilp32.c
index d4cd2a9..a31d538 100644
--- a/arch/arm64/kernel/sys_ilp32.c
+++ b/arch/arm64/kernel/sys_ilp32.c
@@ -65,6 +65,9 @@ static unsigned long compat_sys_pwrite64(unsigned int fd,
  return sys_pwrite64(fd, (char *) ubuf, count, offset);
 }
 
+asmlinkage long ilp32_sys_rt_sigreturn_wrapper(void);
+#define compat_sys_rt_sigreturn        ilp32_sys_rt_sigreturn_wrapper
+
 #include <asm/syscall.h>
 
 #undef __SYSCALL
--
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[PATCH 20/23] arm64: signal32: move ilp32 and aarch32 common code to separated file

Yury Norov-2
In reply to this post by Yury Norov-2
Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/include/asm/signal32_common.h |  25 +++++++
 arch/arm64/kernel/Makefile               |   1 +
 arch/arm64/kernel/signal32.c             |  85 -----------------------
 arch/arm64/kernel/signal32_common.c      | 115 +++++++++++++++++++++++++++++++
 4 files changed, 141 insertions(+), 85 deletions(-)
 create mode 100644 arch/arm64/include/asm/signal32_common.h
 create mode 100644 arch/arm64/kernel/signal32_common.c

diff --git a/arch/arm64/include/asm/signal32_common.h b/arch/arm64/include/asm/signal32_common.h
new file mode 100644
index 0000000..b4f2099
--- /dev/null
+++ b/arch/arm64/include/asm/signal32_common.h
@@ -0,0 +1,25 @@
+/*
+ * 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_COMMON_H
+#define __ASM_SIGNAL32_COMMON_H
+
+#ifdef CONFIG_COMPAT
+
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from);
+int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from);
+
+#endif /* CONFIG_COMPAT*/
+
+#endif /* __ASM_SIGNAL32_COMMON_H */
+
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 7aa65ea..3ed55eb 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -29,6 +29,7 @@ arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \
    sys_compat.o entry32.o \
    ../../arm/kernel/opcodes.o binfmt_elf32.o
 arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o sys_ilp32.o
+arm64-obj-$(CONFIG_COMPAT) += signal32_common.o
 arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
 arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
 arm64-obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index b7063de..b103af3 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -125,91 +125,6 @@ static inline int get_sigset_t(sigset_t *set,
  return 0;
 }
 
-int copy_siginfo_to_user32(compat_siginfo_t __user *to, const 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(from->si_int, &to->si_int);
- 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 explicitly for the right codes here.
- */
- if (from->si_signo == SIGBUS &&
-    (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(from->si_int, &to->si_int);
- break;
- case __SI_SYS:
- err |= __put_user((compat_uptr_t)(unsigned long)
- from->si_call_addr, &to->si_call_addr);
- err |= __put_user(from->si_syscall, &to->si_syscall);
- err |= __put_user(from->si_arch, &to->si_arch);
- 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)
-{
- 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.
  *
diff --git a/arch/arm64/kernel/signal32_common.c b/arch/arm64/kernel/signal32_common.c
new file mode 100644
index 0000000..8fbb609
--- /dev/null
+++ b/arch/arm64/kernel/signal32_common.c
@@ -0,0 +1,115 @@
+/*
+ * Based on arch/arm/kernel/signal.c
+ *
+ * Copyright (C) 1995-2009 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ * Modified by Will Deacon <[hidden email]>
+ *
+ * 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/compat.h>
+#include <linux/signal.h>
+#include <linux/ratelimit.h>
+
+#include <asm/esr.h>
+#include <asm/fpsimd.h>
+#include <asm/signal32_common.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, const 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(from->si_int, &to->si_int);
+ 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 explicitly for the right codes here.
+ */
+ if (from->si_signo == SIGBUS &&
+    (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(from->si_int, &to->si_int);
+ break;
+ case __SI_SYS:
+ err |= __put_user((compat_uptr_t)(unsigned long)
+ from->si_call_addr, &to->si_call_addr);
+ err |= __put_user(from->si_syscall, &to->si_syscall);
+ err |= __put_user(from->si_arch, &to->si_arch);
+ 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)
+{
+ 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;
+}
+
--
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[PATCH 14/23] arm64: ilp32: add is_ilp32_compat_{task,thread} and TIF_32BIT_AARCH64

Yury Norov-2
In reply to this post by Yury Norov-2
ILP32 tasks are needed to be distinguished from lp64 and aarch32.
This patch adds helper functions is_ilp32_compat_{task,thread} and
thread flag TIF_32BIT_AARCH64 to address it. This is a preparation
for following patches in ilp32 patchset.

For consistency, SET_PERSONALITY is changed here accordingly.

Signed-off-by: Andrew Pinski <[hidden email]>
Signed-off-by: Philipp Tomsich <[hidden email]>
Signed-off-by: Christoph Muellner <[hidden email]>
Signed-off-by: Yury Norov <[hidden email]>
Reviewed-by: David Daney <[hidden email]>
---
 arch/arm64/include/asm/elf.h         | 13 +++++++++++--
 arch/arm64/include/asm/is_compat.h   | 28 +++++++++++++++++++++++++++-
 arch/arm64/include/asm/thread_info.h |  2 ++
 3 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index b5437c5..e18bb8a 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -142,7 +142,11 @@ typedef struct user_fpsimd_state elf_fpregset_t;
  */
 #define ELF_PLAT_INIT(_r, load_addr) (_r)->regs[0] = 0
 
-#define SET_PERSONALITY(ex) clear_thread_flag(TIF_32BIT);
+#define SET_PERSONALITY(ex) \
+do { \
+ clear_thread_flag(TIF_32BIT_AARCH64); \
+ clear_thread_flag(TIF_32BIT); \
+} while (0)
 
 #define ARCH_DLINFO \
 do { \
@@ -181,7 +185,12 @@ typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
  ((x)->e_flags & EF_ARM_EABI_MASK))
 
 #define compat_start_thread compat_start_thread
-#define COMPAT_SET_PERSONALITY(ex) set_thread_flag(TIF_32BIT);
+#define COMPAT_SET_PERSONALITY(ex) \
+do { \
+ clear_thread_flag(TIF_32BIT_AARCH64); \
+ set_thread_flag(TIF_32BIT); \
+} while (0)
+
 #define COMPAT_ARCH_DLINFO
 extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
       int uses_interp);
diff --git a/arch/arm64/include/asm/is_compat.h b/arch/arm64/include/asm/is_compat.h
index 6139b5a..55134cf 100644
--- a/arch/arm64/include/asm/is_compat.h
+++ b/arch/arm64/include/asm/is_compat.h
@@ -45,11 +45,37 @@ static inline int is_a32_compat_thread(struct thread_info *thread)
 
 #endif /* CONFIG_AARCH32_EL0 */
 
+#ifdef CONFIG_ARM64_ILP32
+
+static inline int is_ilp32_compat_task(void)
+{
+ return test_thread_flag(TIF_32BIT_AARCH64);
+}
+
+static inline int is_ilp32_compat_thread(struct thread_info *thread)
+{
+ return test_ti_thread_flag(thread, TIF_32BIT_AARCH64);
+}
+
+#else
+
+static inline int is_ilp32_compat_task(void)
+{
+ return 0;
+}
+
+static inline int is_ilp32_compat_thread(struct thread_info *thread)
+{
+ return 0;
+}
+
+#endif /* CONFIG_ARM64_ILP32 */
+
 #ifdef CONFIG_COMPAT
 
 static inline int is_compat_task(void)
 {
- return is_a32_compat_task();
+ return is_a32_compat_task() || is_ilp32_compat_task();
 }
 
 #endif /* CONFIG_COMPAT */
diff --git a/arch/arm64/include/asm/thread_info.h b/arch/arm64/include/asm/thread_info.h
index 4daa559..8802645 100644
--- a/arch/arm64/include/asm/thread_info.h
+++ b/arch/arm64/include/asm/thread_info.h
@@ -119,6 +119,7 @@ static inline struct thread_info *current_thread_info(void)
 #define TIF_RESTORE_SIGMASK 20
 #define TIF_SINGLESTEP 21
 #define TIF_32BIT 22 /* AARCH32 process */
+#define TIF_32BIT_AARCH64 23 /* 32 bit process on AArch64(ILP32) */
 
 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
@@ -130,6 +131,7 @@ static inline struct thread_info *current_thread_info(void)
 #define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
 #define _TIF_SECCOMP (1 << TIF_SECCOMP)
 #define _TIF_32BIT (1 << TIF_32BIT)
+#define _TIF_32BIT_AARCH64 (1 << TIF_32BIT_AARCH64)
 
 #define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
  _TIF_NOTIFY_RESUME | _TIF_FOREIGN_FPSTATE)
--
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[PATCH 17/23] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32

Yury Norov-2
In reply to this post by Yury Norov-2
Here new aarch32 ptrace syscall handler is introsuced to avoid run-time
detection of the task type.

Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/include/asm/unistd32.h |  2 +-
 arch/arm64/kernel/ptrace.c        | 50 ++++++++++++++++++++++++++++++++++++++-
 arch/arm64/kernel/sys32.c         |  1 +
 include/linux/ptrace.h            |  6 +++++
 kernel/ptrace.c                   | 10 ++++----
 5 files changed, 62 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 5b925b7..f57bbe3 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -74,7 +74,7 @@ __SYSCALL(__NR_getuid, sys_getuid16)
  /* 25 was sys_stime */
 __SYSCALL(25, sys_ni_syscall)
 #define __NR_ptrace 26
-__SYSCALL(__NR_ptrace, compat_sys_ptrace)
+__SYSCALL(__NR_ptrace, compat_sys_aarch32_ptrace)
  /* 27 was sys_alarm */
 __SYSCALL(27, sys_ni_syscall)
  /* 28 was sys_fstat */
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 38a09338..a861105 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -29,6 +29,7 @@
 #include <linux/user.h>
 #include <linux/seccomp.h>
 #include <linux/security.h>
+#include <linux/syscalls.h>
 #include <linux/init.h>
 #include <linux/signal.h>
 #include <linux/uaccess.h>
@@ -1114,7 +1115,7 @@ static int compat_ptrace_sethbpregs(struct task_struct *tsk, compat_long_t num,
 }
 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
 
-long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+static long compat_a32_ptrace(struct task_struct *child, compat_long_t request,
  compat_ulong_t caddr, compat_ulong_t cdata)
 {
  unsigned long addr = caddr;
@@ -1191,8 +1192,55 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 
  return ret;
 }
+
+COMPAT_SYSCALL_DEFINE4(aarch32_ptrace, compat_long_t, request, compat_long_t, pid,
+       compat_long_t, addr, compat_long_t, data)
+{
+ struct task_struct *child;
+ long ret;
+
+ if (request == PTRACE_TRACEME) {
+ ret = ptrace_traceme();
+ goto out;
+ }
+
+ child = ptrace_get_task_struct(pid);
+ if (IS_ERR(child)) {
+ ret = PTR_ERR(child);
+ goto out;
+ }
+
+ if (request == PTRACE_ATTACH || request == PTRACE_SEIZE) {
+ ret = ptrace_attach(child, request, addr, data);
+ goto out_put_task_struct;
+ }
+
+ ret = ptrace_check_attach(child, request == PTRACE_KILL ||
+  request == PTRACE_INTERRUPT);
+ if (!ret) {
+ ret = compat_a32_ptrace(child, request, addr, data);
+ if (ret || request != PTRACE_DETACH)
+ ptrace_unfreeze_traced(child);
+ }
+
+ out_put_task_struct:
+ put_task_struct(child);
+ out:
+ return ret;
+}
+
 #endif /* CONFIG_AARCH32_EL0 */
 
+#ifdef CONFIG_COMPAT
+
+long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
+ compat_ulong_t caddr, compat_ulong_t cdata)
+{
+ return compat_ptrace_request(child, request, caddr, cdata);
+}
+
+#endif /* CONFIG_COMPAT */
+
 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
 {
 #ifdef CONFIG_AARCH32_EL0
diff --git a/arch/arm64/kernel/sys32.c b/arch/arm64/kernel/sys32.c
index a40b134..3752443 100644
--- a/arch/arm64/kernel/sys32.c
+++ b/arch/arm64/kernel/sys32.c
@@ -38,6 +38,7 @@ asmlinkage long compat_sys_fadvise64_64_wrapper(void);
 asmlinkage long compat_sys_sync_file_range2_wrapper(void);
 asmlinkage long compat_sys_fallocate_wrapper(void);
 asmlinkage long compat_sys_mmap2_wrapper(void);
+asmlinkage long compat_sys_aarch32_ptrace(void);
 
 #undef __SYSCALL
 #define __SYSCALL(nr, sym) [nr] = sym,
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index 504c98a..75887a0 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -97,6 +97,12 @@ int generic_ptrace_peekdata(struct task_struct *tsk, unsigned long addr,
     unsigned long data);
 int generic_ptrace_pokedata(struct task_struct *tsk, unsigned long addr,
     unsigned long data);
+int ptrace_traceme(void);
+struct task_struct *ptrace_get_task_struct(pid_t pid);
+int ptrace_attach(struct task_struct *task, long request,
+ unsigned long addr, unsigned long flags);
+int ptrace_check_attach(struct task_struct *child, bool ignore_state);
+void ptrace_unfreeze_traced(struct task_struct *task);
 
 /**
  * ptrace_parent - return the task that is tracing the given task
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index d49bfa1..cadf24c 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -136,7 +136,7 @@ static bool ptrace_freeze_traced(struct task_struct *task)
  return ret;
 }
 
-static void ptrace_unfreeze_traced(struct task_struct *task)
+void ptrace_unfreeze_traced(struct task_struct *task)
 {
  if (task->state != __TASK_TRACED)
  return;
@@ -168,7 +168,7 @@ static void ptrace_unfreeze_traced(struct task_struct *task)
  * RETURNS:
  * 0 on success, -ESRCH if %child is not ready.
  */
-static int ptrace_check_attach(struct task_struct *child, bool ignore_state)
+int ptrace_check_attach(struct task_struct *child, bool ignore_state)
 {
  int ret = -ESRCH;
 
@@ -292,7 +292,7 @@ bool ptrace_may_access(struct task_struct *task, unsigned int mode)
  return !err;
 }
 
-static int ptrace_attach(struct task_struct *task, long request,
+int ptrace_attach(struct task_struct *task, long request,
  unsigned long addr,
  unsigned long flags)
 {
@@ -406,7 +406,7 @@ out:
  * Performs checks and sets PT_PTRACED.
  * Should be used by all ptrace implementations for PTRACE_TRACEME.
  */
-static int ptrace_traceme(void)
+ int ptrace_traceme(void)
 {
  int ret = -EPERM;
 
@@ -1056,7 +1056,7 @@ int ptrace_request(struct task_struct *child, long request,
  return ret;
 }
 
-static struct task_struct *ptrace_get_task_struct(pid_t pid)
+struct task_struct *ptrace_get_task_struct(pid_t pid)
 {
  struct task_struct *child;
 
--
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[PATCH 18/23] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it

Yury Norov-2
In reply to this post by Yury Norov-2
From: Andrew Pinski <[hidden email]>

Add a separate syscall-table for ILP32, which dispatches either to native
LP64 system call implementation or to compat-syscalls, as appropriate.

Signed-off-by: Andrew Pinski <[hidden email]>
Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/include/asm/unistd.h | 11 +++++-
 arch/arm64/kernel/Makefile      |  2 +-
 arch/arm64/kernel/entry.S       | 10 ++++-
 arch/arm64/kernel/sys_ilp32.c   | 83 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 102 insertions(+), 4 deletions(-)
 create mode 100644 arch/arm64/kernel/sys_ilp32.c

diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 2971dea..5ea18ef 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -13,9 +13,18 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+
+#ifdef CONFIG_COMPAT
+#define __ARCH_WANT_COMPAT_STAT64
+#endif
+
+#ifdef CONFIG_ARM64_ILP32
+#define __ARCH_WANT_COMPAT_SYS_PREADV64
+#define __ARCH_WANT_COMPAT_SYS_PWRITEV64
+#endif
+
 #ifdef CONFIG_AARCH32_EL0
 #define __ARCH_WANT_COMPAT_SYS_GETDENTS64
-#define __ARCH_WANT_COMPAT_STAT64
 #define __ARCH_WANT_SYS_GETHOSTNAME
 #define __ARCH_WANT_SYS_PAUSE
 #define __ARCH_WANT_SYS_GETPGRP
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 9dfdf86..7aa65ea 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -28,7 +28,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \
    sys_compat.o entry32.o \
    ../../arm/kernel/opcodes.o binfmt_elf32.o
-arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o
+arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o sys_ilp32.o
 arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
 arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
 arm64-obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 21a0624..acea2cb 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -501,6 +501,7 @@ el0_svc_compat:
  * AArch32 syscall handling
  */
  adrp stbl, compat_sys_call_table // load compat syscall table pointer
+ ldr     x16, [tsk, #TI_FLAGS]
  uxtw scno, w7 // syscall number in w7 (r7)
  mov     sc_nr, #__NR_compat_syscalls
  b el0_svc_naked
@@ -717,15 +718,20 @@ ENDPROC(ret_from_fork)
  .align 6
 el0_svc:
  adrp stbl, sys_call_table // load syscall table pointer
+ ldr x16, [tsk, #TI_FLAGS]
  uxtw scno, w8 // syscall number in w8
  mov sc_nr, #__NR_syscalls
+#ifdef CONFIG_ARM64_ILP32
+ adrp x17, sys_call_ilp32_table // load ilp32 syscall table pointer
+ tst x16, #_TIF_32BIT_AARCH64
+ csel    stbl, stbl, x17, eq // We are using ILP32
+#endif
 el0_svc_naked: // compat entry point
  stp x0, scno, [sp, #S_ORIG_X0] // save the original x0 and syscall number
  enable_dbg_and_irq
  ct_user_exit 1
 
- ldr x16, [tsk, #TI_FLAGS] // check for syscall hooks
- tst x16, #_TIF_SYSCALL_WORK
+ tst x16, #_TIF_SYSCALL_WORK // check for syscall hooks
  b.ne __sys_trace
  cmp     scno, sc_nr                     // check upper syscall limit
  b.hs ni_sys
diff --git a/arch/arm64/kernel/sys_ilp32.c b/arch/arm64/kernel/sys_ilp32.c
new file mode 100644
index 0000000..d4cd2a9
--- /dev/null
+++ b/arch/arm64/kernel/sys_ilp32.c
@@ -0,0 +1,83 @@
+/*
+ * AArch64- ILP32 specific system calls implementation
+ *
+ * Copyright (C) 2016 Cavium Inc.
+ * Author: Andrew Pinski <[hidden email]>
+ *
+ * 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/compiler.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/msg.h>
+#include <linux/export.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/compat.h>
+#include <asm-generic/syscalls.h>
+
+/* Using non-compat syscalls where necessary */
+#define compat_sys_fadvise64_64 sys_fadvise64_64
+#define compat_sys_fallocate sys_fallocate
+#define compat_sys_ftruncate64 sys_ftruncate
+#define compat_sys_lookup_dcookie sys_lookup_dcookie
+#define compat_sys_readahead sys_readahead
+#define compat_sys_shmat sys_shmat
+#define compat_sys_sync_file_range sys_sync_file_range
+#define compat_sys_truncate64 sys_truncate
+#define sys_llseek sys_lseek
+#define sys_mmap2 compat_sys_mmap2
+
+static unsigned long compat_sys_mmap2(compat_uptr_t addr, compat_size_t len,
+       int prot, int flags, int fd, off_t pgoff)
+{
+       if (pgoff & (~PAGE_MASK >> 12))
+               return -EINVAL;
+
+       return sys_mmap_pgoff(addr, len, prot, flags, fd,
+       pgoff >> (PAGE_SHIFT - 12));
+}
+
+static unsigned long compat_sys_pread64(unsigned int fd,
+ compat_uptr_t __user *ubuf, compat_size_t count, off_t offset)
+{
+ return sys_pread64(fd, (char *) ubuf, count, offset);
+}
+
+static unsigned long compat_sys_pwrite64(unsigned int fd,
+ compat_uptr_t __user *ubuf, compat_size_t count, off_t offset)
+{
+ return sys_pwrite64(fd, (char *) ubuf, count, offset);
+}
+
+#include <asm/syscall.h>
+
+#undef __SYSCALL
+#undef __SC_WRAP
+
+#define __SYSCALL(nr, sym) [nr] = sym,
+#define __SC_WRAP(nr, sym) [nr] = compat_##sym,
+
+/*
+ * The sys_call_ilp32_table array must be 4K aligned to be accessible from
+ * kernel/entry.S.
+ */
+void *sys_call_ilp32_table[__NR_syscalls] __aligned(4096) = {
+ [0 ... __NR_syscalls - 1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
--
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[PATCH 15/23] arm64: introduce binfmt_elf32.c

Yury Norov-2
In reply to this post by Yury Norov-2
As we support more than one compat formats, it looks more reasonable
to not use fs/compat_binfmt.c. Custom binfmt_elf32.c allows to move aarch32
specific definitions there and make code more maintainable and readable.

Signed-off-by: Yury Norov <[hidden email]>
---
 arch/arm64/Kconfig               |  1 -
 arch/arm64/include/asm/elf.h     | 24 ------------------------
 arch/arm64/include/asm/hwcap.h   |  2 --
 arch/arm64/kernel/Makefile       |  2 +-
 arch/arm64/kernel/binfmt_elf32.c | 33 +++++++++++++++++++++++++++++++++
 5 files changed, 34 insertions(+), 28 deletions(-)
 create mode 100644 arch/arm64/kernel/binfmt_elf32.c

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index ede9b2e..0bb7adc 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -932,7 +932,6 @@ config AARCH32_EL0
  bool "Kernel support for 32-bit EL0"
  def_bool y
  depends on ARM64_4K_PAGES || EXPERT
- select COMPAT_BINFMT_ELF
  select HAVE_UID16
  select OLD_SIGSUSPEND3
  select COMPAT_OLD_SIGACTION
diff --git a/arch/arm64/include/asm/elf.h b/arch/arm64/include/asm/elf.h
index e18bb8a..7a39683 100644
--- a/arch/arm64/include/asm/elf.h
+++ b/arch/arm64/include/asm/elf.h
@@ -166,12 +166,6 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 
 #ifdef CONFIG_COMPAT
 
-#ifdef __AARCH64EB__
-#define COMPAT_ELF_PLATFORM ("v8b")
-#else
-#define COMPAT_ELF_PLATFORM ("v8l")
-#endif
-
 #define COMPAT_ELF_ET_DYN_BASE (2 * TASK_SIZE_32 / 3)
 
 /* AArch32 registers. */
@@ -179,24 +173,6 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
 typedef unsigned int compat_elf_greg_t;
 typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
 
-/* AArch32 EABI. */
-#define EF_ARM_EABI_MASK 0xff000000
-#define compat_elf_check_arch(x) (((x)->e_machine == EM_ARM) && \
- ((x)->e_flags & EF_ARM_EABI_MASK))
-
-#define compat_start_thread compat_start_thread
-#define COMPAT_SET_PERSONALITY(ex) \
-do { \
- clear_thread_flag(TIF_32BIT_AARCH64); \
- set_thread_flag(TIF_32BIT); \
-} while (0)
-
-#define COMPAT_ARCH_DLINFO
-extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
-      int uses_interp);
-#define compat_arch_setup_additional_pages \
- aarch32_setup_vectors_page
-
 #endif /* CONFIG_COMPAT */
 
 #endif /* !__ASSEMBLY__ */
diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h
index 2c7fc5d..99dfd92 100644
--- a/arch/arm64/include/asm/hwcap.h
+++ b/arch/arm64/include/asm/hwcap.h
@@ -47,8 +47,6 @@
 #define ELF_HWCAP (elf_hwcap)
 
 #ifdef CONFIG_AARCH32_EL0
-#define COMPAT_ELF_HWCAP (compat_elf_hwcap)
-#define COMPAT_ELF_HWCAP2 (compat_elf_hwcap2)
 extern unsigned int compat_elf_hwcap, compat_elf_hwcap2;
 #endif
 
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 75dd250..6bc9738 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -27,7 +27,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 
 arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \
    sys_compat.o entry32.o \
-   ../../arm/kernel/opcodes.o
+   ../../arm/kernel/opcodes.o binfmt_elf32.o
 arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o
 arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
 arm64-obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o
diff --git a/arch/arm64/kernel/binfmt_elf32.c b/arch/arm64/kernel/binfmt_elf32.c
new file mode 100644
index 0000000..5487872
--- /dev/null
+++ b/arch/arm64/kernel/binfmt_elf32.c
@@ -0,0 +1,33 @@
+/*
+ * Support for AArch32 Linux ELF binaries.
+ */
+
+/* AArch32 EABI. */
+#define EF_ARM_EABI_MASK 0xff000000
+#define compat_elf_check_arch(x) (((x)->e_machine == EM_ARM) && \
+ ((x)->e_flags & EF_ARM_EABI_MASK))
+
+#define compat_start_thread compat_start_thread
+#define COMPAT_SET_PERSONALITY(ex) \
+do { \
+ clear_thread_flag(TIF_32BIT_AARCH64); \
+ set_thread_flag(TIF_32BIT); \
+} while (0)
+
+#define COMPAT_ARCH_DLINFO
+#define COMPAT_ELF_HWCAP (compat_elf_hwcap)
+#define COMPAT_ELF_HWCAP2 (compat_elf_hwcap2)
+
+#ifdef __AARCH64EB__
+#define COMPAT_ELF_PLATFORM ("v8b")
+#else
+#define COMPAT_ELF_PLATFORM ("v8l")
+#endif
+
+#define compat_arch_setup_additional_pages \
+ aarch32_setup_vectors_page
+struct linux_binprm;
+extern int aarch32_setup_vectors_page(struct linux_binprm *bprm,
+      int uses_interp);
+
+#include "../../../fs/compat_binfmt_elf.c"
--
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[PATCH 07/23] 32-bit ABI: introduce ARCH_32BIT_OFF_T config option

Yury Norov-2
In reply to this post by Yury Norov-2
All new 32-bit architectures should have 64-bit off_t type, but existing
architectures has 32-bit ones.

To handle it, new config option is added to arch/Kconfig that defaults
ARCH_32BIT_OFF_T to be disabled for non-64 bit architectures. All existing
32-bit architectures enable it explicitly here.

New option affects force_o_largefile() behaviour. Namely, if off_t is
64-bits long, we have no reason to reject user to open big files.

Note that even if architectures has only 64-bit off_t in the kernel
(arc, c6x, h8300, hexagon, metag, nios2, openrisc, tile32 and unicore32),
a libc may use 32-bit off_t, and therefore want to limit the file size
to 4GB unless specified differently in the open flags.

Signed-off-by: Yury Norov <[hidden email]>
---
 arch/Kconfig            | 4 ++++
 arch/arc/Kconfig        | 1 +
 arch/arm/Kconfig        | 1 +
 arch/blackfin/Kconfig   | 1 +
 arch/cris/Kconfig       | 1 +
 arch/frv/Kconfig        | 1 +
 arch/h8300/Kconfig      | 1 +
 arch/hexagon/Kconfig    | 1 +
 arch/m32r/Kconfig       | 1 +
 arch/m68k/Kconfig       | 1 +
 arch/metag/Kconfig      | 1 +
 arch/microblaze/Kconfig | 1 +
 arch/mips/Kconfig       | 1 +
 arch/mn10300/Kconfig    | 1 +
 arch/nios2/Kconfig      | 1 +
 arch/openrisc/Kconfig   | 1 +
 arch/parisc/Kconfig     | 1 +
 arch/powerpc/Kconfig    | 1 +
 arch/score/Kconfig      | 1 +
 arch/sh/Kconfig         | 1 +
 arch/sparc/Kconfig      | 1 +
 arch/tile/Kconfig       | 1 +
 arch/unicore32/Kconfig  | 1 +
 arch/x86/Kconfig        | 1 +
 arch/x86/um/Kconfig     | 1 +
 arch/xtensa/Kconfig     | 1 +
 include/linux/fcntl.h   | 2 +-
 27 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 92fcbd4..a2b7cf3 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -230,6 +230,10 @@ config ARCH_THREAD_INFO_ALLOCATOR
 config ARCH_WANTS_DYNAMIC_TASK_STRUCT
  bool
 
+config ARCH_32BIT_OFF_T
+ bool
+ depends on !64BIT
+
 config HAVE_REGS_AND_STACK_ACCESS_API
  bool
  help
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index a876743..13f66cc 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -9,6 +9,7 @@
 config ARC
  def_bool y
  select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
+ select ARCH_32BIT_OFF_T
  select BUILDTIME_EXTABLE_SORT
  select COMMON_CLK
  select CLONE_BACKWARDS
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cdfa6c2..efe3ca2 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1,6 +1,7 @@
 config ARM
  bool
  default y
+ select ARCH_32BIT_OFF_T
  select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  select ARCH_HAS_DEVMEM_IS_ALLOWED
  select ARCH_HAS_ELF_RANDOMIZE
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index a63c122..ef4368e 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -12,6 +12,7 @@ config RWSEM_XCHGADD_ALGORITHM
 
 config BLACKFIN
  def_bool y
+ select ARCH_32BIT_OFF_T
  select HAVE_ARCH_KGDB
  select HAVE_ARCH_TRACEHOOK
  select HAVE_DYNAMIC_FTRACE
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index e086f9e..5bc9203 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -50,6 +50,7 @@ config LOCKDEP_SUPPORT
 config CRIS
  bool
  default y
+ select ARCH_32BIT_OFF_T
  select HAVE_IDE
  select GENERIC_ATOMIC64
  select HAVE_UID16
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index eefd9a4..2f14904 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -1,6 +1,7 @@
 config FRV
  bool
  default y
+ select ARCH_32BIT_OFF_T
  select HAVE_IDE
  select HAVE_ARCH_TRACEHOOK
  select HAVE_PERF_EVENTS
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 986ea84..8c221f1 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -1,5 +1,6 @@
 config H8300
         def_bool y
+ select ARCH_32BIT_OFF_T
  select GENERIC_ATOMIC64
  select HAVE_UID16
  select VIRT_TO_BUS
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 57298e7..df84602 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -3,6 +3,7 @@ comment "Linux Kernel Configuration for Hexagon"
 
 config HEXAGON
  def_bool y
+ select ARCH_32BIT_OFF_T
  select HAVE_OPROFILE
  # Other pending projects/to-do items.
  # select HAVE_REGS_AND_STACK_ACCESS_API
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index c82b292..7866bca 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -1,6 +1,7 @@
 config M32R
  bool
  default y
+ select ARCH_32BIT_OFF_T
  select HAVE_IDE
  select HAVE_OPROFILE
  select INIT_ALL_POSSIBLE
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 498b567..e9897e4 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -1,6 +1,7 @@
 config M68K
  bool
  default y
+ select ARCH_32BIT_OFF_T
  select ARCH_MIGHT_HAVE_PC_PARPORT if ISA
  select HAVE_IDE
  select HAVE_AOUT if MMU
diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index a0fa88d..5b7620a 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -1,5 +1,6 @@
 config METAG
  def_bool y
+ select ARCH_32BIT_OFF_T
  select EMBEDDED
  select GENERIC_ATOMIC64
  select GENERIC_CLOCKEVENTS
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 3d793b5..bdb0f83 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -1,5 +1,6 @@
 config MICROBLAZE
  def_bool y
+ select ARCH_32BIT_OFF_T
  select ARCH_HAS_GCOV_PROFILE_ALL
  select ARCH_MIGHT_HAVE_PC_PARPORT
  select ARCH_WANT_IPC_PARSE_VERSION
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 2018c2b..079a6d2 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1,6 +1,7 @@
 config MIPS
  bool
  default y
+ select ARCH_32BIT_OFF_T if !64BIT
  select ARCH_SUPPORTS_UPROBES
  select ARCH_MIGHT_HAVE_PC_PARPORT
  select ARCH_MIGHT_HAVE_PC_SERIO
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index 06ddb55..bc1aae5 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -1,5 +1,6 @@
 config MN10300
  def_bool y
+ select ARCH_32BIT_OFF_T
  select HAVE_OPROFILE
  select HAVE_UID16
  select GENERIC_IRQ_SHOW
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index 4375554..a38fc38 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -1,5 +1,6 @@
 config NIOS2
  def_bool y
+ select ARCH_32BIT_OFF_T
  select ARCH_WANT_OPTIONAL_GPIOLIB
  select CLKSRC_OF
  select GENERIC_ATOMIC64
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index e118c02..0271714 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -5,6 +5,7 @@
 
 config OPENRISC
  def_bool y
+ select ARCH_32BIT_OFF_T
  select OF
  select OF_EARLY_FLATTREE
  select IRQ_DOMAIN
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 88cfaa8..affad75 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -1,5 +1,6 @@
 config PARISC
  def_bool y
+ select ARCH_32BIT_OFF_T if !64BIT
  select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
  select ARCH_MIGHT_HAVE_PC_PARPORT
  select HAVE_IDE
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 7cd32c0..2c7a795 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -85,6 +85,7 @@ config ARCH_HAS_DMA_SET_COHERENT_MASK
 config PPC
  bool
  default y
+ select ARCH_32BIT_OFF_T if PPC32
  select ARCH_MIGHT_HAVE_PC_PARPORT
  select ARCH_MIGHT_HAVE_PC_SERIO
  select BINFMT_ELF
diff --git a/arch/score/Kconfig b/arch/score/Kconfig
index 366e1b5..bc7bc7a 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig
@@ -2,6 +2,7 @@ menu "Machine selection"
 
 config SCORE
        def_bool y
+       select ARCH_32BIT_OFF_T
        select GENERIC_IRQ_SHOW
        select GENERIC_IOMAP
        select GENERIC_ATOMIC64
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 7ed20fc..2438390 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -52,6 +52,7 @@ config SUPERH
 
 config SUPERH32
  def_bool ARCH = "sh"
+ select ARCH_32BIT_OFF_T
  select HAVE_KPROBES
  select HAVE_KRETPROBES
  select HAVE_IOREMAP_PROT if MMU && !X2TLB
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 57ffaf2..c88b82d 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -45,6 +45,7 @@ config SPARC
 
 config SPARC32
  def_bool !64BIT
+ select ARCH_32BIT_OFF_T
  select GENERIC_ATOMIC64
  select CLZ_TAB
  select HAVE_UID16
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 8171930..f9d61e7 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -3,6 +3,7 @@
 
 config TILE
  def_bool y
+ select ARCH_32BIT_OFF_T if !64BIT
  select HAVE_PERF_EVENTS
  select USE_PMC if PERF_EVENTS
  select HAVE_DMA_API_DEBUG
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index e5602ee..b995104 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -1,6 +1,7 @@
 config UNICORE32
  def_bool y
  select ARCH_HAS_DEVMEM_IS_ALLOWED
+ select ARCH_32BIT_OFF_T
  select ARCH_MIGHT_HAVE_PC_PARPORT
  select ARCH_MIGHT_HAVE_PC_SERIO
  select HAVE_MEMBLOCK
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2dc18605..3628b14 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -20,6 +20,7 @@ config X86
  select ACPI_LEGACY_TABLES_LOOKUP if ACPI
  select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
  select ANON_INODES
+ select ARCH_32BIT_OFF_T if X86_32
  select ARCH_CLOCKSOURCE_DATA
  select ARCH_DISCARD_MEMBLOCK
  select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index ed56a1c..8436bcd 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -21,6 +21,7 @@ config 64BIT
 config X86_32
  def_bool !64BIT
  select HAVE_AOUT
+ select ARCH_32BIT_OFF_T
  select ARCH_WANT_IPC_PARSE_VERSION
  select MODULES_USE_ELF_REL
  select CLONE_BACKWARDS
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index e832d3e..b68de31 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -3,6 +3,7 @@ config ZONE_DMA
 
 config XTENSA
  def_bool y
+ select ARCH_32BIT_OFF_T
  select ARCH_WANT_FRAME_POINTERS
  select ARCH_WANT_IPC_PARSE_VERSION
  select ARCH_WANT_OPTIONAL_GPIOLIB
diff --git a/include/linux/fcntl.h b/include/linux/fcntl.h
index 76ce329..46960a1 100644
--- a/include/linux/fcntl.h
+++ b/include/linux/fcntl.h
@@ -5,7 +5,7 @@
 
 
 #ifndef force_o_largefile
-#define force_o_largefile() (BITS_PER_LONG != 32)
+#define force_o_largefile() (!IS_ENABLED(CONFIG_ARCH_32BIT_OFF_T))
 #endif
 
 #if BITS_PER_LONG == 32
--
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[PATCH 04/23] all: s390: move compat_wrappers.c from arch/s390/kernel to kernel/

Yury Norov-2
In reply to this post by Yury Norov-2
Some syscalls are declared conditionally, so corresponding wrappers
are conditional accordingly.

Signed-off-by: Yury Norov <[hidden email]>
---
 arch/s390/kernel/Makefile         |   2 +-
 arch/s390/kernel/compat_linux.c   |   4 +
 arch/s390/kernel/compat_wrapper.c | 129 ----------------------------
 kernel/Makefile                   |   1 +
 kernel/compat_wrapper.c           | 175 ++++++++++++++++++++++++++++++++++++++
 5 files changed, 181 insertions(+), 130 deletions(-)
 delete mode 100644 arch/s390/kernel/compat_wrapper.c
 create mode 100644 kernel/compat_wrapper.c

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 2f5586a..145d3d8 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -57,7 +57,7 @@ obj-$(CONFIG_HIBERNATION) += suspend.o swsusp.o
 obj-$(CONFIG_AUDIT) += audit.o
 compat-obj-$(CONFIG_AUDIT) += compat_audit.o
 obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o
-obj-$(CONFIG_COMPAT) += compat_wrapper.o $(compat-obj-y)
+obj-$(CONFIG_COMPAT) += $(compat-obj-y)
 
 obj-$(CONFIG_STACKTRACE) += stacktrace.o
 obj-$(CONFIG_KPROBES) += kprobes.o
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 437e611..783c208 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -86,6 +86,10 @@
 #define SET_STAT_UID(stat, uid) (stat).st_uid = high2lowuid(uid)
 #define SET_STAT_GID(stat, gid) (stat).st_gid = high2lowgid(gid)
 
+COMPAT_SYSCALL_WRAP3(s390_pci_mmio_write, const unsigned long, mmio_addr, const void __user *, user_buffer, const size_t, length);
+
+COMPAT_SYSCALL_WRAP3(s390_pci_mmio_read, const unsigned long, mmio_addr, void __user *, user_buffer, const size_t, length);
+
 COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename,
        u16, user, u16, group)
 {
diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c
deleted file mode 100644
index 1614e15..0000000
--- a/arch/s390/kernel/compat_wrapper.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- *  Compat system call wrappers.
- *
- *    Copyright IBM Corp. 2014
- */
-
-#include <linux/syscalls.h>
-#include <linux/compat.h>
-#include "entry.h"
-
-COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
-COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
-COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
-COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
-COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
-COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
-COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
-COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
-COMPAT_SYSCALL_WRAP2(rename, const char __user *, oldname, const char __user *, newname);
-COMPAT_SYSCALL_WRAP2(mkdir, const char __user *, pathname, umode_t, mode);
-COMPAT_SYSCALL_WRAP1(rmdir, const char __user *, pathname);
-COMPAT_SYSCALL_WRAP1(pipe, int __user *, fildes);
-COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);
-COMPAT_SYSCALL_WRAP2(signal, int, sig, __sighandler_t, handler);
-COMPAT_SYSCALL_WRAP1(acct, const char __user *, name);
-COMPAT_SYSCALL_WRAP2(umount, char __user *, name, int, flags);
-COMPAT_SYSCALL_WRAP1(chroot, const char __user *, filename);
-COMPAT_SYSCALL_WRAP3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask);
-COMPAT_SYSCALL_WRAP2(sethostname, char __user *, name, int, len);
-COMPAT_SYSCALL_WRAP2(symlink, const char __user *, old, const char __user *, new);
-COMPAT_SYSCALL_WRAP3(readlink, const char __user *, path, char __user *, buf, int, bufsiz);
-COMPAT_SYSCALL_WRAP1(uselib, const char __user *, library);
-COMPAT_SYSCALL_WRAP2(swapon, const char __user *, specialfile, int, swap_flags);
-COMPAT_SYSCALL_WRAP4(reboot, int, magic1, int, magic2, unsigned int, cmd, void __user *, arg);
-COMPAT_SYSCALL_WRAP2(munmap, unsigned long, addr, size_t, len);
-COMPAT_SYSCALL_WRAP3(syslog, int, type, char __user *, buf, int, len);
-COMPAT_SYSCALL_WRAP1(swapoff, const char __user *, specialfile);
-COMPAT_SYSCALL_WRAP2(setdomainname, char __user *, name, int, len);
-COMPAT_SYSCALL_WRAP1(newuname, struct new_utsname __user *, name);
-COMPAT_SYSCALL_WRAP3(mprotect, unsigned long, start, size_t, len, unsigned long, prot);
-COMPAT_SYSCALL_WRAP3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs);
-COMPAT_SYSCALL_WRAP2(delete_module, const char __user *, name_user, unsigned int, flags);
-COMPAT_SYSCALL_WRAP4(quotactl, unsigned int, cmd, const char __user *, special, qid_t, id, void __user *, addr);
-COMPAT_SYSCALL_WRAP2(bdflush, int, func, long, data);
-COMPAT_SYSCALL_WRAP3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2);
-COMPAT_SYSCALL_WRAP5(llseek, unsigned int, fd, unsigned long, high, unsigned long, low, loff_t __user *, result, unsigned int, whence);
-COMPAT_SYSCALL_WRAP3(msync, unsigned long, start, size_t, len, int, flags);
-COMPAT_SYSCALL_WRAP2(mlock, unsigned long, start, size_t, len);
-COMPAT_SYSCALL_WRAP2(munlock, unsigned long, start, size_t, len);
-COMPAT_SYSCALL_WRAP2(sched_setparam, pid_t, pid, struct sched_param __user *, param);
-COMPAT_SYSCALL_WRAP2(sched_getparam, pid_t, pid, struct sched_param __user *, param);
-COMPAT_SYSCALL_WRAP3(sched_setscheduler, pid_t, pid, int, policy, struct sched_param __user *, param);
-COMPAT_SYSCALL_WRAP5(mremap, unsigned long, addr, unsigned long, old_len, unsigned long, new_len, unsigned long, flags, unsigned long, new_addr);
-COMPAT_SYSCALL_WRAP3(poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout);
-COMPAT_SYSCALL_WRAP5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, unsigned long, arg4, unsigned long, arg5);
-COMPAT_SYSCALL_WRAP2(getcwd, char __user *, buf, unsigned long, size);
-COMPAT_SYSCALL_WRAP2(capget, cap_user_header_t, header, cap_user_data_t, dataptr);
-COMPAT_SYSCALL_WRAP2(capset, cap_user_header_t, header, const cap_user_data_t, data);
-COMPAT_SYSCALL_WRAP3(lchown, const char __user *, filename, uid_t, user, gid_t, group);
-COMPAT_SYSCALL_WRAP2(getgroups, int, gidsetsize, gid_t __user *, grouplist);
-COMPAT_SYSCALL_WRAP2(setgroups, int, gidsetsize, gid_t __user *, grouplist);
-COMPAT_SYSCALL_WRAP3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid);
-COMPAT_SYSCALL_WRAP3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid);
-COMPAT_SYSCALL_WRAP3(chown, const char __user *, filename, uid_t, user, gid_t, group);
-COMPAT_SYSCALL_WRAP2(pivot_root, const char __user *, new_root, const char __user *, put_old);
-COMPAT_SYSCALL_WRAP3(mincore, unsigned long, start, size_t, len, unsigned char __user *, vec);
-COMPAT_SYSCALL_WRAP3(madvise, unsigned long, start, size_t, len, int, behavior);
-COMPAT_SYSCALL_WRAP5(setxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
-COMPAT_SYSCALL_WRAP5(lsetxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
-COMPAT_SYSCALL_WRAP5(fsetxattr, int, fd, const char __user *, name, const void __user *, value, size_t, size, int, flags);
-COMPAT_SYSCALL_WRAP3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count);
-COMPAT_SYSCALL_WRAP4(getxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
-COMPAT_SYSCALL_WRAP4(lgetxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
-COMPAT_SYSCALL_WRAP4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size);
-COMPAT_SYSCALL_WRAP3(listxattr, const char __user *, path, char __user *, list, size_t, size);
-COMPAT_SYSCALL_WRAP3(llistxattr, const char __user *, path, char __user *, list, size_t, size);
-COMPAT_SYSCALL_WRAP3(flistxattr, int, fd, char __user *, list, size_t, size);
-COMPAT_SYSCALL_WRAP2(removexattr, const char __user *, path, const char __user *, name);
-COMPAT_SYSCALL_WRAP2(lremovexattr, const char __user *, path, const char __user *, name);
-COMPAT_SYSCALL_WRAP2(fremovexattr, int, fd, const char __user *, name);
-COMPAT_SYSCALL_WRAP1(set_tid_address, int __user *, tidptr);
-COMPAT_SYSCALL_WRAP4(epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event __user *, event);
-COMPAT_SYSCALL_WRAP4(epoll_wait, int, epfd, struct epoll_event __user *, events, int, maxevents, int, timeout);
-COMPAT_SYSCALL_WRAP1(io_destroy, aio_context_t, ctx);
-COMPAT_SYSCALL_WRAP3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, struct io_event __user *, result);
-COMPAT_SYSCALL_WRAP1(mq_unlink, const char __user *, name);
-COMPAT_SYSCALL_WRAP5(add_key, const char __user *, tp, const char __user *, dsc, const void __user *, pld, size_t, len, key_serial_t, id);
-COMPAT_SYSCALL_WRAP4(request_key, const char __user *, tp, const char __user *, dsc, const char __user *, info, key_serial_t, id);
-COMPAT_SYSCALL_WRAP5(remap_file_pages, unsigned long, start, unsigned long, size, unsigned long, prot, unsigned long, pgoff, unsigned long, flags);
-COMPAT_SYSCALL_WRAP3(inotify_add_watch, int, fd, const char __user *, path, u32, mask);
-COMPAT_SYSCALL_WRAP3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode);
-COMPAT_SYSCALL_WRAP4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, unsigned, dev);
-COMPAT_SYSCALL_WRAP5(fchownat, int, dfd, const char __user *, filename, uid_t, user, gid_t, group, int, flag);
-COMPAT_SYSCALL_WRAP3(unlinkat, int, dfd, const char __user *, pathname, int, flag);
-COMPAT_SYSCALL_WRAP4(renameat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname);
-COMPAT_SYSCALL_WRAP5(linkat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, int, flags);
-COMPAT_SYSCALL_WRAP3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname);
-COMPAT_SYSCALL_WRAP4(readlinkat, int, dfd, const char __user *, path, char __user *, buf, int, bufsiz);
-COMPAT_SYSCALL_WRAP3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode);
-COMPAT_SYSCALL_WRAP3(faccessat, int, dfd, const char __user *, filename, int, mode);
-COMPAT_SYSCALL_WRAP1(unshare, unsigned long, unshare_flags);
-COMPAT_SYSCALL_WRAP6(splice, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
-COMPAT_SYSCALL_WRAP4(tee, int, fdin, int, fdout, size_t, len, unsigned int, flags);
-COMPAT_SYSCALL_WRAP3(getcpu, unsigned __user *, cpu, unsigned __user *, node, struct getcpu_cache __user *, cache);
-COMPAT_SYSCALL_WRAP2(pipe2, int __user *, fildes, int, flags);
-COMPAT_SYSCALL_WRAP5(perf_event_open, struct perf_event_attr __user *, attr_uptr, pid_t, pid, int, cpu, int, group_fd, unsigned long, flags);
-COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags, int __user *, parent_tidptr, int __user *, child_tidptr, unsigned long, tls);
-COMPAT_SYSCALL_WRAP4(prlimit64, pid_t, pid, unsigned int, resource, const struct rlimit64 __user *, new_rlim, struct rlimit64 __user *, old_rlim);
-COMPAT_SYSCALL_WRAP5(name_to_handle_at, int, dfd, const char __user *, name, struct file_handle __user *, handle, int __user *, mnt_id, int, flag);
-COMPAT_SYSCALL_WRAP5(kcmp, pid_t, pid1, pid_t, pid2, int, type, unsigned long, idx1, unsigned long, idx2);
-COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, flags);
-COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
-COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
-COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
-COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char __user *, uargs)
-COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags)
-COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags)
-COMPAT_SYSCALL_WRAP3(bpf, int, cmd, union bpf_attr *, attr, unsigned int, size);
-COMPAT_SYSCALL_WRAP3(s390_pci_mmio_write, const unsigned long, mmio_addr, const void __user *, user_buffer, const size_t, length);
-COMPAT_SYSCALL_WRAP3(s390_pci_mmio_read, const unsigned long, mmio_addr, void __user *, user_buffer, const size_t, length);
-COMPAT_SYSCALL_WRAP4(socketpair, int, family, int, type, int, protocol, int __user *, usockvec);
-COMPAT_SYSCALL_WRAP3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen);
-COMPAT_SYSCALL_WRAP3(connect, int, fd, struct sockaddr __user *, uservaddr, int, addrlen);
-COMPAT_SYSCALL_WRAP4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen, int, flags);
-COMPAT_SYSCALL_WRAP3(getsockname, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
-COMPAT_SYSCALL_WRAP3(getpeername, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
-COMPAT_SYSCALL_WRAP6(sendto, int, fd, void __user *, buff, size_t, len, unsigned int, flags, struct sockaddr __user *, addr, int, addr_len);
-COMPAT_SYSCALL_WRAP3(mlock2, unsigned long, start, size_t, len, int, flags);
-COMPAT_SYSCALL_WRAP6(copy_file_range, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
diff --git a/kernel/Makefile b/kernel/Makefile
index f0c40bf..882eec03 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -64,6 +64,7 @@ obj-$(CONFIG_KEXEC) += kexec.o
 obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
 obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
 obj-$(CONFIG_COMPAT) += compat.o
+obj-$(CONFIG_COMPAT_WRAPPER) += compat_wrapper.o
 obj-$(CONFIG_CGROUPS) += cgroup.o
 obj-$(CONFIG_CGROUP_FREEZER) += cgroup_freezer.o
 obj-$(CONFIG_CGROUP_PIDS) += cgroup_pids.o
diff --git a/kernel/compat_wrapper.c b/kernel/compat_wrapper.c
new file mode 100644
index 0000000..b6c050e
--- /dev/null
+++ b/kernel/compat_wrapper.c
@@ -0,0 +1,175 @@
+/*
+ *  Compat system call wrappers.
+ *
+ *    Copyright IBM Corp. 2014
+ */
+
+#include <linux/syscalls.h>
+#include <linux/compat.h>
+
+COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode);
+COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname);
+COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname);
+COMPAT_SYSCALL_WRAP1(chdir, const char __user *, filename);
+COMPAT_SYSCALL_WRAP3(mknod, const char __user *, filename, umode_t, mode, unsigned, dev);
+COMPAT_SYSCALL_WRAP2(chmod, const char __user *, filename, umode_t, mode);
+
+#ifdef __ARCH_WANT_SYS_OLDUMOUNT
+COMPAT_SYSCALL_WRAP1(oldumount, char __user *, name);
+#endif
+
+COMPAT_SYSCALL_WRAP2(access, const char __user *, filename, int, mode);
+COMPAT_SYSCALL_WRAP2(rename, const char __user *, oldname, const char __user *, newname);
+COMPAT_SYSCALL_WRAP2(mkdir, const char __user *, pathname, umode_t, mode);
+COMPAT_SYSCALL_WRAP1(rmdir, const char __user *, pathname);
+COMPAT_SYSCALL_WRAP1(pipe, int __user *, fildes);
+COMPAT_SYSCALL_WRAP1(brk, unsigned long, brk);
+
+#ifdef __ARCH_WANT_SYS_SIGNAL
+COMPAT_SYSCALL_WRAP2(signal, int, sig, __sighandler_t, handler);
+#endif
+
+COMPAT_SYSCALL_WRAP1(acct, const char __user *, name);
+COMPAT_SYSCALL_WRAP2(umount, char __user *, name, int, flags);
+COMPAT_SYSCALL_WRAP1(chroot, const char __user *, filename);
+
+#ifdef CONFIG_OLD_SIGSUSPEND
+SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask);
+#endif
+
+#ifdef CONFIG_OLD_SIGSUSPEND3
+COMPAT_SYSCALL_WRAP3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask);
+#endif
+
+COMPAT_SYSCALL_WRAP2(sethostname, char __user *, name, int, len);
+COMPAT_SYSCALL_WRAP2(symlink, const char __user *, old, const char __user *, new);
+COMPAT_SYSCALL_WRAP3(readlink, const char __user *, path, char __user *, buf, int, bufsiz);
+COMPAT_SYSCALL_WRAP1(uselib, const char __user *, library);
+COMPAT_SYSCALL_WRAP2(swapon, const char __user *, specialfile, int, swap_flags);
+COMPAT_SYSCALL_WRAP4(reboot, int, magic1, int, magic2, unsigned int, cmd, void __user *, arg);
+COMPAT_SYSCALL_WRAP2(munmap, unsigned long, addr, size_t, len);
+COMPAT_SYSCALL_WRAP3(syslog, int, type, char __user *, buf, int, len);
+COMPAT_SYSCALL_WRAP1(swapoff, const char __user *, specialfile);
+COMPAT_SYSCALL_WRAP2(setdomainname, char __user *, name, int, len);
+COMPAT_SYSCALL_WRAP1(newuname, struct new_utsname __user *, name);
+COMPAT_SYSCALL_WRAP3(mprotect, unsigned long, start, size_t, len, unsigned long, prot);
+COMPAT_SYSCALL_WRAP3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs);
+COMPAT_SYSCALL_WRAP2(delete_module, const char __user *, name_user, unsigned int, flags);
+COMPAT_SYSCALL_WRAP4(quotactl, unsigned int, cmd, const char __user *, special, qid_t, id, void __user *, addr);
+COMPAT_SYSCALL_WRAP2(bdflush, int, func, long, data);
+COMPAT_SYSCALL_WRAP3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2);
+
+#ifdef __ARCH_WANT_SYS_LLSEEK
+COMPAT_SYSCALL_WRAP5(llseek, unsigned int, fd, unsigned long, high, unsigned long, low, loff_t __user *, result, unsigned int, whence);
+#endif
+
+COMPAT_SYSCALL_WRAP3(msync, unsigned long, start, size_t, len, int, flags);
+COMPAT_SYSCALL_WRAP2(mlock, unsigned long, start, size_t, len);
+COMPAT_SYSCALL_WRAP2(munlock, unsigned long, start, size_t, len);
+COMPAT_SYSCALL_WRAP2(sched_setparam, pid_t, pid, struct sched_param __user *, param);
+COMPAT_SYSCALL_WRAP2(sched_getparam, pid_t, pid, struct sched_param __user *, param);
+COMPAT_SYSCALL_WRAP3(sched_setscheduler, pid_t, pid, int, policy, struct sched_param __user *, param);
+COMPAT_SYSCALL_WRAP5(mremap, unsigned long, addr, unsigned long, old_len, unsigned long, new_len, unsigned long, flags, unsigned long, new_addr);
+COMPAT_SYSCALL_WRAP3(poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout);
+COMPAT_SYSCALL_WRAP5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, unsigned long, arg4, unsigned long, arg5);
+COMPAT_SYSCALL_WRAP2(getcwd, char __user *, buf, unsigned long, size);
+COMPAT_SYSCALL_WRAP2(capget, cap_user_header_t, header, cap_user_data_t, dataptr);
+COMPAT_SYSCALL_WRAP2(capset, cap_user_header_t, header, const cap_user_data_t, data);
+COMPAT_SYSCALL_WRAP3(lchown, const char __user *, filename, uid_t, user, gid_t, group);
+COMPAT_SYSCALL_WRAP2(getgroups, int, gidsetsize, gid_t __user *, grouplist);
+COMPAT_SYSCALL_WRAP2(setgroups, int, gidsetsize, gid_t __user *, grouplist);
+COMPAT_SYSCALL_WRAP3(getresuid, uid_t __user *, ruid, uid_t __user *, euid, uid_t __user *, suid);
+COMPAT_SYSCALL_WRAP3(getresgid, gid_t __user *, rgid, gid_t __user *, egid, gid_t __user *, sgid);
+COMPAT_SYSCALL_WRAP3(chown, const char __user *, filename, uid_t, user, gid_t, group);
+COMPAT_SYSCALL_WRAP2(pivot_root, const char __user *, new_root, const char __user *, put_old);
+COMPAT_SYSCALL_WRAP3(mincore, unsigned long, start, size_t, len, unsigned char __user *, vec);
+COMPAT_SYSCALL_WRAP3(madvise, unsigned long, start, size_t, len, int, behavior);
+COMPAT_SYSCALL_WRAP5(setxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
+COMPAT_SYSCALL_WRAP5(lsetxattr, const char __user *, path, const char __user *, name, const void __user *, value, size_t, size, int, flags);
+COMPAT_SYSCALL_WRAP5(fsetxattr, int, fd, const char __user *, name, const void __user *, value, size_t, size, int, flags);
+
+#ifndef __ARCH_WANT_COMPAT_SYS_GETDENTS64
+COMPAT_SYSCALL_WRAP3(getdents64, unsigned int, fd, struct linux_dirent64 __user *, dirent, unsigned int, count);
+#endif
+
+COMPAT_SYSCALL_WRAP4(getxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
+COMPAT_SYSCALL_WRAP4(lgetxattr, const char __user *, path, const char __user *, name, void __user *, value, size_t, size);
+COMPAT_SYSCALL_WRAP4(fgetxattr, int, fd, const char __user *, name, void __user *, value, size_t, size);
+COMPAT_SYSCALL_WRAP3(listxattr, const char __user *, path, char __user *, list, size_t, size);
+COMPAT_SYSCALL_WRAP3(llistxattr, const char __user *, path, char __user *, list, size_t, size);
+COMPAT_SYSCALL_WRAP3(flistxattr, int, fd, char __user *, list, size_t, size);
+COMPAT_SYSCALL_WRAP2(removexattr, const char __user *, path, const char __user *, name);
+COMPAT_SYSCALL_WRAP2(lremovexattr, const char __user *, path, const char __user *, name);
+COMPAT_SYSCALL_WRAP2(fremovexattr, int, fd, const char __user *, name);
+COMPAT_SYSCALL_WRAP1(set_tid_address, int __user *, tidptr);
+COMPAT_SYSCALL_WRAP4(epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event __user *, event);
+COMPAT_SYSCALL_WRAP4(epoll_wait, int, epfd, struct epoll_event __user *, events, int, maxevents, int, timeout);
+COMPAT_SYSCALL_WRAP1(io_destroy, aio_context_t, ctx);
+COMPAT_SYSCALL_WRAP3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, struct io_event __user *, result);
+COMPAT_SYSCALL_WRAP1(mq_unlink, const char __user *, name);
+COMPAT_SYSCALL_WRAP5(add_key, const char __user *, tp, const char __user *, dsc, const void __user *, pld, size_t, len, key_serial_t, id);
+COMPAT_SYSCALL_WRAP4(request_key, const char __user *, tp, const char __user *, dsc, const char __user *, info, key_serial_t, id);
+COMPAT_SYSCALL_WRAP5(remap_file_pages, unsigned long, start, unsigned long, size, unsigned long, prot, unsigned long, pgoff, unsigned long, flags);
+COMPAT_SYSCALL_WRAP3(inotify_add_watch, int, fd, const char __user *, path, u32, mask);
+COMPAT_SYSCALL_WRAP3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode);
+COMPAT_SYSCALL_WRAP4(mknodat, int, dfd, const char __user *, filename, umode_t, mode, unsigned, dev);
+COMPAT_SYSCALL_WRAP5(fchownat, int, dfd, const char __user *, filename, uid_t, user, gid_t, group, int, flag);
+COMPAT_SYSCALL_WRAP3(unlinkat, int, dfd, const char __user *, pathname, int, flag);
+COMPAT_SYSCALL_WRAP4(renameat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname);
+COMPAT_SYSCALL_WRAP5(linkat, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, int, flags);
+COMPAT_SYSCALL_WRAP3(symlinkat, const char __user *, oldname, int, newdfd, const char __user *, newname);
+COMPAT_SYSCALL_WRAP4(readlinkat, int, dfd, const char __user *, path, char __user *, buf, int, bufsiz);
+COMPAT_SYSCALL_WRAP3(fchmodat, int, dfd, const char __user *, filename, umode_t, mode);
+COMPAT_SYSCALL_WRAP3(faccessat, int, dfd, const char __user *, filename, int, mode);
+COMPAT_SYSCALL_WRAP1(unshare, unsigned long, unshare_flags);
+COMPAT_SYSCALL_WRAP6(splice, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
+COMPAT_SYSCALL_WRAP4(tee, int, fdin, int, fdout, size_t, len, unsigned int, flags);
+COMPAT_SYSCALL_WRAP3(getcpu, unsigned __user *, cpu, unsigned __user *, node, struct getcpu_cache __user *, cache);
+COMPAT_SYSCALL_WRAP2(pipe2, int __user *, fildes, int, flags);
+COMPAT_SYSCALL_WRAP5(perf_event_open, struct perf_event_attr __user *, attr_uptr, pid_t, pid, int, cpu, int, group_fd, unsigned long, flags);
+
+#ifdef __ARCH_WANT_SYS_CLONE
+#ifdef CONFIG_CLONE_BACKWARDS
+COMPAT_SYSCALL_WRAP5(clone, unsigned long, clone_flags, unsigned long, newsp,
+                int __user *, parent_tidptr,
+                unsigned long, tls,
+                int __user *, child_tidptr);
+#elif defined(CONFIG_CLONE_BACKWARDS2)
+       COMPAT_SYSCALL_WRAP5(clone, unsigned long, newsp, unsigned long, clone_flags,
+               int __user *, parent_tidptr,
+               int __user *, child_tidptr,
+               unsigned long, tls);
+#elif defined(CONFIG_CLONE_BACKWARDS3)
+       COMPAT_SYSCALL_WRAP6(clone, unsigned long, clone_flags, unsigned long, newsp,
+              int, stack_size,
+              int __user *, parent_tidptr,
+              int __user *, child_tidptr,
+               unsigned long, tls);
+#else
+COMPAT_SYSCALL_WRAP5(clone, unsigned long, clone_flags, unsigned long, newsp,
+       int __user *, parent_tidptr,
+       int __user *, child_tidptr,
+       unsigned long, tls);
+#endif
+#endif
+
+COMPAT_SYSCALL_WRAP4(prlimit64, pid_t, pid, unsigned int, resource, const struct rlimit64 __user *, new_rlim, struct rlimit64 __user *, old_rlim);
+COMPAT_SYSCALL_WRAP5(name_to_handle_at, int, dfd, const char __user *, name, struct file_handle __user *, handle, int __user *, mnt_id, int, flag);
+COMPAT_SYSCALL_WRAP5(kcmp, pid_t, pid1, pid_t, pid2, int, type, unsigned long, idx1, unsigned long, idx2);
+COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, flags);
+COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
+COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
+COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
+COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char __user *, uargs)
+COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags)
+COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags)
+COMPAT_SYSCALL_WRAP3(bpf, int, cmd, union bpf_attr *, attr, unsigned int, size);
+COMPAT_SYSCALL_WRAP4(socketpair, int, family, int, type, int, protocol, int __user *, usockvec);
+COMPAT_SYSCALL_WRAP3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen);
+COMPAT_SYSCALL_WRAP3(connect, int, fd, struct sockaddr __user *, uservaddr, int, addrlen);
+COMPAT_SYSCALL_WRAP4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen, int, flags);
+COMPAT_SYSCALL_WRAP3(getsockname, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
+COMPAT_SYSCALL_WRAP3(getpeername, int, fd, struct sockaddr __user *, usockaddr, int __user *, usockaddr_len);
+COMPAT_SYSCALL_WRAP6(sendto, int, fd, void __user *, buff, size_t, len, unsigned int, flags, struct sockaddr __user *, addr, int, addr_len);
+COMPAT_SYSCALL_WRAP3(mlock2, unsigned long, start, size_t, len, int, flags);
+COMPAT_SYSCALL_WRAP6(copy_file_range, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
--
2.5.0

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