[PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

2017-06-19 Thread Yury Norov 
According to userspace/kernel ABI, userspace off_t is  passed in register pair
just like in aarch32. In this patch corresponding aarch32 handlers
are shared to ilp32 code.

Signed-off-by: Yury Norov 
---
 arch/arm64/kernel/Makefile |   1 +
 arch/arm64/kernel/entry32.S|  80 ---
 arch/arm64/kernel/entry32_common.S | 107 +
 3 files changed, 108 insertions(+), 80 deletions(-)
 create mode 100644 arch/arm64/kernel/entry32_common.S

diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 41d9a3ab07a7..7243ffe358b4 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -30,6 +30,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 arm64-obj-$(CONFIG_AARCH32_EL0)+= sys32.o kuser32.o signal32.o 
\
   sys_compat.o entry32.o binfmt_elf32.o
 arm64-obj-$(CONFIG_ARM64_ILP32)+= binfmt_ilp32.o
+arm64-obj-$(CONFIG_COMPAT) += entry32_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/entry32.S b/arch/arm64/kernel/entry32.S
index f332d5d1f6b4..4bede0324440 100644
--- a/arch/arm64/kernel/entry32.S
+++ b/arch/arm64/kernel/entry32.S
@@ -39,83 +39,3 @@ ENTRY(compat_sys_rt_sigreturn_wrapper)
mov x0, sp
b   compat_sys_rt_sigreturn
 ENDPROC(compat_sys_rt_sigreturn_wrapper)
-
-ENTRY(compat_sys_statfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_statfs64
-ENDPROC(compat_sys_statfs64_wrapper)
-
-ENTRY(compat_sys_fstatfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_fstatfs64
-ENDPROC(compat_sys_fstatfs64_wrapper)
-
-/*
- * Note: off_4k (w5) is always in units of 4K. If we can't do the
- * requested offset because it is not page-aligned, we return -EINVAL.
- */
-ENTRY(compat_sys_mmap2_wrapper)
-#if PAGE_SHIFT > 12
-   tst w5, #~PAGE_MASK >> 12
-   b.ne1f
-   lsr w5, w5, #PAGE_SHIFT - 12
-#endif
-   b   sys_mmap_pgoff
-1: mov x0, #-EINVAL
-   ret
-ENDPROC(compat_sys_mmap2_wrapper)
-
-/*
- * Wrappers for AArch32 syscalls that either take 64-bit parameters
- * in registers or that take 32-bit parameters which require sign
- * extension.
- */
-ENTRY(compat_sys_pread64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pread64
-ENDPROC(compat_sys_pread64_wrapper)
-
-ENTRY(compat_sys_pwrite64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pwrite64
-ENDPROC(compat_sys_pwrite64_wrapper)
-
-ENTRY(compat_sys_truncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_truncate
-ENDPROC(compat_sys_truncate64_wrapper)
-
-ENTRY(compat_sys_ftruncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_ftruncate
-ENDPROC(compat_sys_ftruncate64_wrapper)
-
-ENTRY(compat_sys_readahead_wrapper)
-   regs_to_64  x1, x2, x3
-   mov w2, w4
-   b   sys_readahead
-ENDPROC(compat_sys_readahead_wrapper)
-
-ENTRY(compat_sys_fadvise64_64_wrapper)
-   mov w6, w1
-   regs_to_64  x1, x2, x3
-   regs_to_64  x2, x4, x5
-   mov w3, w6
-   b   sys_fadvise64_64
-ENDPROC(compat_sys_fadvise64_64_wrapper)
-
-ENTRY(compat_sys_sync_file_range2_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_sync_file_range2
-ENDPROC(compat_sys_sync_file_range2_wrapper)
-
-ENTRY(compat_sys_fallocate_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_fallocate
-ENDPROC(compat_sys_fallocate_wrapper)
diff --git a/arch/arm64/kernel/entry32_common.S 
b/arch/arm64/kernel/entry32_common.S
new file mode 100644
index ..f4a5e4de6201
--- /dev/null
+++ b/arch/arm64/kernel/entry32_common.S
@@ -0,0 +1,107 @@
+/*
+ * Compat system call wrappers
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Authors: Will Deacon 
+ * Catalin Marinas 
+ *
+ * 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 .
+ */
+
+#include 
+#include 
+
+#include 
+#include 
+#include 
+#include 
+
+/*
+ * Note: off_4k (w5) is always in

Re: [PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

2017-06-08 Thread Arnd Bergmann 
On Thu, Jun 8, 2017 at 4:10 PM, Catalin Marinas  wrote:
> On Sun, Jun 04, 2017 at 03:00:02PM +0300, Yury Norov wrote:
>> off_t is  passed in register pair just like in aarch32.
>> In this patch corresponding aarch32 handlers are shared to
>> ilp32 code.
>
> Is the comment here relevant? IOW, do we have any AArch64/ILP32 syscall
> where off_t is used as an argument? AFAICT, the *64 syscalls use loff_t
> or loff_t *.

I think it should just be reworded, the 'off_t' above seems to refer to the
user space type that corresponds to the kernel's loff_t.

   Arnd
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Re: [PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

2017-06-08 Thread Catalin Marinas 
On Sun, Jun 04, 2017 at 03:00:02PM +0300, Yury Norov wrote:
> off_t is  passed in register pair just like in aarch32.
> In this patch corresponding aarch32 handlers are shared to
> ilp32 code.

Is the comment here relevant? IOW, do we have any AArch64/ILP32 syscall
where off_t is used as an argument? AFAICT, the *64 syscalls use loff_t
or loff_t *.

-- 
Catalin
--
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[PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

2017-06-04 Thread Yury Norov 
off_t is  passed in register pair just like in aarch32.
In this patch corresponding aarch32 handlers are shared to
ilp32 code.

Signed-off-by: Yury Norov 
---
 arch/arm64/kernel/Makefile |   1 +
 arch/arm64/kernel/entry32.S|  80 ---
 arch/arm64/kernel/entry32_common.S | 107 +
 3 files changed, 108 insertions(+), 80 deletions(-)
 create mode 100644 arch/arm64/kernel/entry32_common.S

diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 5ba41095c466..f6f12e2e5010 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -30,6 +30,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 arm64-obj-$(CONFIG_AARCH32_EL0)+= sys32.o kuser32.o signal32.o 
\
   sys_compat.o entry32.o binfmt_elf32.o
 arm64-obj-$(CONFIG_ARM64_ILP32)+= binfmt_ilp32.o
+arm64-obj-$(CONFIG_COMPAT) += entry32_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/entry32.S b/arch/arm64/kernel/entry32.S
index f332d5d1f6b4..4bede0324440 100644
--- a/arch/arm64/kernel/entry32.S
+++ b/arch/arm64/kernel/entry32.S
@@ -39,83 +39,3 @@ ENTRY(compat_sys_rt_sigreturn_wrapper)
mov x0, sp
b   compat_sys_rt_sigreturn
 ENDPROC(compat_sys_rt_sigreturn_wrapper)
-
-ENTRY(compat_sys_statfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_statfs64
-ENDPROC(compat_sys_statfs64_wrapper)
-
-ENTRY(compat_sys_fstatfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_fstatfs64
-ENDPROC(compat_sys_fstatfs64_wrapper)
-
-/*
- * Note: off_4k (w5) is always in units of 4K. If we can't do the
- * requested offset because it is not page-aligned, we return -EINVAL.
- */
-ENTRY(compat_sys_mmap2_wrapper)
-#if PAGE_SHIFT > 12
-   tst w5, #~PAGE_MASK >> 12
-   b.ne1f
-   lsr w5, w5, #PAGE_SHIFT - 12
-#endif
-   b   sys_mmap_pgoff
-1: mov x0, #-EINVAL
-   ret
-ENDPROC(compat_sys_mmap2_wrapper)
-
-/*
- * Wrappers for AArch32 syscalls that either take 64-bit parameters
- * in registers or that take 32-bit parameters which require sign
- * extension.
- */
-ENTRY(compat_sys_pread64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pread64
-ENDPROC(compat_sys_pread64_wrapper)
-
-ENTRY(compat_sys_pwrite64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pwrite64
-ENDPROC(compat_sys_pwrite64_wrapper)
-
-ENTRY(compat_sys_truncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_truncate
-ENDPROC(compat_sys_truncate64_wrapper)
-
-ENTRY(compat_sys_ftruncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_ftruncate
-ENDPROC(compat_sys_ftruncate64_wrapper)
-
-ENTRY(compat_sys_readahead_wrapper)
-   regs_to_64  x1, x2, x3
-   mov w2, w4
-   b   sys_readahead
-ENDPROC(compat_sys_readahead_wrapper)
-
-ENTRY(compat_sys_fadvise64_64_wrapper)
-   mov w6, w1
-   regs_to_64  x1, x2, x3
-   regs_to_64  x2, x4, x5
-   mov w3, w6
-   b   sys_fadvise64_64
-ENDPROC(compat_sys_fadvise64_64_wrapper)
-
-ENTRY(compat_sys_sync_file_range2_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_sync_file_range2
-ENDPROC(compat_sys_sync_file_range2_wrapper)
-
-ENTRY(compat_sys_fallocate_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_fallocate
-ENDPROC(compat_sys_fallocate_wrapper)
diff --git a/arch/arm64/kernel/entry32_common.S 
b/arch/arm64/kernel/entry32_common.S
new file mode 100644
index ..f4a5e4de6201
--- /dev/null
+++ b/arch/arm64/kernel/entry32_common.S
@@ -0,0 +1,107 @@
+/*
+ * Compat system call wrappers
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Authors: Will Deacon 
+ * Catalin Marinas 
+ *
+ * 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 .
+ */
+
+#include 
+#include 
+
+#include 
+#include 
+#include 
+#include 
+
+/*
+ * Note: off_4k (w5) is always in units of 4K. If we can't do the
+ * requested

[PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

2017-03-01 Thread Yury Norov 
off_t is  passed in register pair just like in aarch32.
In this patch corresponding aarch32 handlers are shared to
ilp32 code.

Signed-off-by: Yury Norov 
---
 arch/arm64/kernel/Makefile |   1 +
 arch/arm64/kernel/entry32.S|  80 ---
 arch/arm64/kernel/entry32_common.S | 107 +
 3 files changed, 108 insertions(+), 80 deletions(-)
 create mode 100644 arch/arm64/kernel/entry32_common.S

diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index b6f14a8..e0798d7 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -30,6 +30,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 arm64-obj-$(CONFIG_AARCH32_EL0)+= sys32.o kuser32.o signal32.o 
\
   sys_compat.o entry32.o binfmt_elf32.o
 arm64-obj-$(CONFIG_ARM64_ILP32)+= binfmt_ilp32.o
+arm64-obj-$(CONFIG_COMPAT) += entry32_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/entry32.S b/arch/arm64/kernel/entry32.S
index f332d5d..4bede03 100644
--- a/arch/arm64/kernel/entry32.S
+++ b/arch/arm64/kernel/entry32.S
@@ -39,83 +39,3 @@ ENTRY(compat_sys_rt_sigreturn_wrapper)
mov x0, sp
b   compat_sys_rt_sigreturn
 ENDPROC(compat_sys_rt_sigreturn_wrapper)
-
-ENTRY(compat_sys_statfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_statfs64
-ENDPROC(compat_sys_statfs64_wrapper)
-
-ENTRY(compat_sys_fstatfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_fstatfs64
-ENDPROC(compat_sys_fstatfs64_wrapper)
-
-/*
- * Note: off_4k (w5) is always in units of 4K. If we can't do the
- * requested offset because it is not page-aligned, we return -EINVAL.
- */
-ENTRY(compat_sys_mmap2_wrapper)
-#if PAGE_SHIFT > 12
-   tst w5, #~PAGE_MASK >> 12
-   b.ne1f
-   lsr w5, w5, #PAGE_SHIFT - 12
-#endif
-   b   sys_mmap_pgoff
-1: mov x0, #-EINVAL
-   ret
-ENDPROC(compat_sys_mmap2_wrapper)
-
-/*
- * Wrappers for AArch32 syscalls that either take 64-bit parameters
- * in registers or that take 32-bit parameters which require sign
- * extension.
- */
-ENTRY(compat_sys_pread64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pread64
-ENDPROC(compat_sys_pread64_wrapper)
-
-ENTRY(compat_sys_pwrite64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pwrite64
-ENDPROC(compat_sys_pwrite64_wrapper)
-
-ENTRY(compat_sys_truncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_truncate
-ENDPROC(compat_sys_truncate64_wrapper)
-
-ENTRY(compat_sys_ftruncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_ftruncate
-ENDPROC(compat_sys_ftruncate64_wrapper)
-
-ENTRY(compat_sys_readahead_wrapper)
-   regs_to_64  x1, x2, x3
-   mov w2, w4
-   b   sys_readahead
-ENDPROC(compat_sys_readahead_wrapper)
-
-ENTRY(compat_sys_fadvise64_64_wrapper)
-   mov w6, w1
-   regs_to_64  x1, x2, x3
-   regs_to_64  x2, x4, x5
-   mov w3, w6
-   b   sys_fadvise64_64
-ENDPROC(compat_sys_fadvise64_64_wrapper)
-
-ENTRY(compat_sys_sync_file_range2_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_sync_file_range2
-ENDPROC(compat_sys_sync_file_range2_wrapper)
-
-ENTRY(compat_sys_fallocate_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_fallocate
-ENDPROC(compat_sys_fallocate_wrapper)
diff --git a/arch/arm64/kernel/entry32_common.S 
b/arch/arm64/kernel/entry32_common.S
new file mode 100644
index 000..f4a5e4d
--- /dev/null
+++ b/arch/arm64/kernel/entry32_common.S
@@ -0,0 +1,107 @@
+/*
+ * Compat system call wrappers
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Authors: Will Deacon 
+ * Catalin Marinas 
+ *
+ * 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 .
+ */
+
+#include 
+#include 
+
+#include 
+#include 
+#include 
+#include 
+
+/*
+ * Note: off_4k (w5) is always in units of 4K. If we can't do the
+ * requested offset because it is not

[PATCH 13/20] arm64: ilp32: share aarch32 syscall handlers

2017-01-09 Thread Yury Norov 
off_t is  passed in register pair just like in aarch32.
In this patch corresponding aarch32 handlers are shared to
ilp32 code.

Signed-off-by: Yury Norov 
---
 arch/arm64/kernel/Makefile |   1 +
 arch/arm64/kernel/entry32.S|  80 ---
 arch/arm64/kernel/entry32_common.S | 107 +
 3 files changed, 108 insertions(+), 80 deletions(-)
 create mode 100644 arch/arm64/kernel/entry32_common.S

diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index f661888..9123bb8 100644
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -30,6 +30,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE
 arm64-obj-$(CONFIG_AARCH32_EL0)+= sys32.o kuser32.o signal32.o 
\
   sys_compat.o entry32.o binfmt_elf32.o
 arm64-obj-$(CONFIG_ARM64_ILP32)+= binfmt_ilp32.o
+arm64-obj-$(CONFIG_COMPAT) += entry32_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/entry32.S b/arch/arm64/kernel/entry32.S
index f332d5d..4bede03 100644
--- a/arch/arm64/kernel/entry32.S
+++ b/arch/arm64/kernel/entry32.S
@@ -39,83 +39,3 @@ ENTRY(compat_sys_rt_sigreturn_wrapper)
mov x0, sp
b   compat_sys_rt_sigreturn
 ENDPROC(compat_sys_rt_sigreturn_wrapper)
-
-ENTRY(compat_sys_statfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_statfs64
-ENDPROC(compat_sys_statfs64_wrapper)
-
-ENTRY(compat_sys_fstatfs64_wrapper)
-   mov w3, #84
-   cmp w1, #88
-   cselw1, w3, w1, eq
-   b   compat_sys_fstatfs64
-ENDPROC(compat_sys_fstatfs64_wrapper)
-
-/*
- * Note: off_4k (w5) is always in units of 4K. If we can't do the
- * requested offset because it is not page-aligned, we return -EINVAL.
- */
-ENTRY(compat_sys_mmap2_wrapper)
-#if PAGE_SHIFT > 12
-   tst w5, #~PAGE_MASK >> 12
-   b.ne1f
-   lsr w5, w5, #PAGE_SHIFT - 12
-#endif
-   b   sys_mmap_pgoff
-1: mov x0, #-EINVAL
-   ret
-ENDPROC(compat_sys_mmap2_wrapper)
-
-/*
- * Wrappers for AArch32 syscalls that either take 64-bit parameters
- * in registers or that take 32-bit parameters which require sign
- * extension.
- */
-ENTRY(compat_sys_pread64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pread64
-ENDPROC(compat_sys_pread64_wrapper)
-
-ENTRY(compat_sys_pwrite64_wrapper)
-   regs_to_64  x3, x4, x5
-   b   sys_pwrite64
-ENDPROC(compat_sys_pwrite64_wrapper)
-
-ENTRY(compat_sys_truncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_truncate
-ENDPROC(compat_sys_truncate64_wrapper)
-
-ENTRY(compat_sys_ftruncate64_wrapper)
-   regs_to_64  x1, x2, x3
-   b   sys_ftruncate
-ENDPROC(compat_sys_ftruncate64_wrapper)
-
-ENTRY(compat_sys_readahead_wrapper)
-   regs_to_64  x1, x2, x3
-   mov w2, w4
-   b   sys_readahead
-ENDPROC(compat_sys_readahead_wrapper)
-
-ENTRY(compat_sys_fadvise64_64_wrapper)
-   mov w6, w1
-   regs_to_64  x1, x2, x3
-   regs_to_64  x2, x4, x5
-   mov w3, w6
-   b   sys_fadvise64_64
-ENDPROC(compat_sys_fadvise64_64_wrapper)
-
-ENTRY(compat_sys_sync_file_range2_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_sync_file_range2
-ENDPROC(compat_sys_sync_file_range2_wrapper)
-
-ENTRY(compat_sys_fallocate_wrapper)
-   regs_to_64  x2, x2, x3
-   regs_to_64  x3, x4, x5
-   b   sys_fallocate
-ENDPROC(compat_sys_fallocate_wrapper)
diff --git a/arch/arm64/kernel/entry32_common.S 
b/arch/arm64/kernel/entry32_common.S
new file mode 100644
index 000..f4a5e4d
--- /dev/null
+++ b/arch/arm64/kernel/entry32_common.S
@@ -0,0 +1,107 @@
+/*
+ * Compat system call wrappers
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Authors: Will Deacon 
+ * Catalin Marinas 
+ *
+ * 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 .
+ */
+
+#include 
+#include 
+
+#include 
+#include 
+#include 
+#include 
+
+/*
+ * Note: off_4k (w5) is always in units of 4K. If we can't do the
+ * requested offset because it is not