[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/x86/lib/getuser.S b/src/kernel/linux/v4.14/arch/x86/lib/getuser.S
new file mode 100644
index 0000000..49b167f
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/x86/lib/getuser.S
@@ -0,0 +1,143 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * __get_user functions.
+ *
+ * (C) Copyright 1998 Linus Torvalds
+ * (C) Copyright 2005 Andi Kleen
+ * (C) Copyright 2008 Glauber Costa
+ *
+ * These functions have a non-standard call interface
+ * to make them more efficient, especially as they
+ * return an error value in addition to the "real"
+ * return value.
+ */
+
+/*
+ * __get_user_X
+ *
+ * Inputs: %[r|e]ax contains the address.
+ *
+ * Outputs: %[r|e]ax is error code (0 or -EFAULT)
+ * %[r|e]dx contains zero-extended value
+ * %ecx contains the high half for 32-bit __get_user_8
+ *
+ *
+ * These functions should not modify any other registers,
+ * as they get called from within inline assembly.
+ */
+
+#include <linux/linkage.h>
+#include <asm/page_types.h>
+#include <asm/errno.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/asm.h>
+#include <asm/smap.h>
+#include <asm/export.h>
+
+ .text
+ENTRY(__get_user_1)
+ mov PER_CPU_VAR(current_task), %_ASM_DX
+ cmp TASK_addr_limit(%_ASM_DX),%_ASM_AX
+ jae bad_get_user
+ sbb %_ASM_DX, %_ASM_DX /* array_index_mask_nospec() */
+ and %_ASM_DX, %_ASM_AX
+ ASM_STAC
+1: movzbl (%_ASM_AX),%edx
+ xor %eax,%eax
+ ASM_CLAC
+ ret
+ENDPROC(__get_user_1)
+EXPORT_SYMBOL(__get_user_1)
+
+ENTRY(__get_user_2)
+ add $1,%_ASM_AX
+ jc bad_get_user
+ mov PER_CPU_VAR(current_task), %_ASM_DX
+ cmp TASK_addr_limit(%_ASM_DX),%_ASM_AX
+ jae bad_get_user
+ sbb %_ASM_DX, %_ASM_DX /* array_index_mask_nospec() */
+ and %_ASM_DX, %_ASM_AX
+ ASM_STAC
+2: movzwl -1(%_ASM_AX),%edx
+ xor %eax,%eax
+ ASM_CLAC
+ ret
+ENDPROC(__get_user_2)
+EXPORT_SYMBOL(__get_user_2)
+
+ENTRY(__get_user_4)
+ add $3,%_ASM_AX
+ jc bad_get_user
+ mov PER_CPU_VAR(current_task), %_ASM_DX
+ cmp TASK_addr_limit(%_ASM_DX),%_ASM_AX
+ jae bad_get_user
+ sbb %_ASM_DX, %_ASM_DX /* array_index_mask_nospec() */
+ and %_ASM_DX, %_ASM_AX
+ ASM_STAC
+3: movl -3(%_ASM_AX),%edx
+ xor %eax,%eax
+ ASM_CLAC
+ ret
+ENDPROC(__get_user_4)
+EXPORT_SYMBOL(__get_user_4)
+
+ENTRY(__get_user_8)
+#ifdef CONFIG_X86_64
+ add $7,%_ASM_AX
+ jc bad_get_user
+ mov PER_CPU_VAR(current_task), %_ASM_DX
+ cmp TASK_addr_limit(%_ASM_DX),%_ASM_AX
+ jae bad_get_user
+ sbb %_ASM_DX, %_ASM_DX /* array_index_mask_nospec() */
+ and %_ASM_DX, %_ASM_AX
+ ASM_STAC
+4: movq -7(%_ASM_AX),%rdx
+ xor %eax,%eax
+ ASM_CLAC
+ ret
+#else
+ add $7,%_ASM_AX
+ jc bad_get_user_8
+ mov PER_CPU_VAR(current_task), %_ASM_DX
+ cmp TASK_addr_limit(%_ASM_DX),%_ASM_AX
+ jae bad_get_user_8
+ sbb %_ASM_DX, %_ASM_DX /* array_index_mask_nospec() */
+ and %_ASM_DX, %_ASM_AX
+ ASM_STAC
+4: movl -7(%_ASM_AX),%edx
+5: movl -3(%_ASM_AX),%ecx
+ xor %eax,%eax
+ ASM_CLAC
+ ret
+#endif
+ENDPROC(__get_user_8)
+EXPORT_SYMBOL(__get_user_8)
+
+
+bad_get_user:
+ xor %edx,%edx
+ mov $(-EFAULT),%_ASM_AX
+ ASM_CLAC
+ ret
+END(bad_get_user)
+
+#ifdef CONFIG_X86_32
+bad_get_user_8:
+ xor %edx,%edx
+ xor %ecx,%ecx
+ mov $(-EFAULT),%_ASM_AX
+ ASM_CLAC
+ ret
+END(bad_get_user_8)
+#endif
+
+ _ASM_EXTABLE(1b,bad_get_user)
+ _ASM_EXTABLE(2b,bad_get_user)
+ _ASM_EXTABLE(3b,bad_get_user)
+#ifdef CONFIG_X86_64
+ _ASM_EXTABLE(4b,bad_get_user)
+#else
+ _ASM_EXTABLE(4b,bad_get_user_8)
+ _ASM_EXTABLE(5b,bad_get_user_8)
+#endif