ARM: probes: move all probe code to dedicate directory

In discussion on LKML (https://lkml.org/lkml/2014/11/28/158), Russell
King suggests to move all probe related code to arch/arm/probes. This
patch does the work. Due to dependency on 'arch/arm/kernel/patch.h', this
patch also moves patch.h to 'arch/arm/include/asm/patch.h', and related
'#include' directives are also midified to '#include <asm/patch.h>'.

Following is an overview of this patch:

 ./arch/arm/kernel/               ./arch/arm/probes/
 |-- Makefile                     |-- Makefile
 |-- probes-arm.c          ==>    |-- decode-arm.c
 |-- probes-arm.h          ==>    |-- decode-arm.h
 |-- probes-thumb.c        ==>    |-- decode-thumb.c
 |-- probes-thumb.h        ==>    |-- decode-thumb.h
 |-- probes.c              ==>    |-- decode.c
 |-- probes.h              ==>    |-- decode.h
 |                                |-- kprobes
 |                                |   |-- Makefile
 |-- kprobes-arm.c         ==>    |   |-- actions-arm.c
 |-- kprobes-common.c      ==>    |   |-- actions-common.c
 |-- kprobes-thumb.c       ==>    |   |-- actions-thumb.c
 |-- kprobes.c             ==>    |   |-- core.c
 |-- kprobes.h             ==>    |   |-- core.h
 |-- kprobes-test-arm.c    ==>    |   |-- test-arm.c
 |-- kprobes-test.c        ==>    |   |-- test-core.c
 |-- kprobes-test.h        ==>    |   |-- test-core.h
 |-- kprobes-test-thumb.c  ==>    |   `-- test-thumb.c
 |                                `-- uprobes
 |                                    |-- Makefile
 |-- uprobes-arm.c         ==>        |-- actions-arm.c
 |-- uprobes.c             ==>        |-- core.c
 |-- uprobes.h             ==>        `-- core.h
 |
 `-- patch.h               ==>    arch/arm/include/asm/patch.h

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>

arch/arm/Makefile

@@ -266,6 +266,7 @@ core-$(CONFIG_KVM_ARM_HOST) 	+= arch/arm/kvm/
 
 # If we have a machine-specific directory, then include it in the build.
 core-y				+= arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
+core-y				+= arch/arm/probes/
 core-y				+= arch/arm/net/
 core-y				+= arch/arm/crypto/
 core-y				+= arch/arm/firmware/

arch/arm/kernel/Makefile

@@ -51,20 +51,8 @@ obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o insn.o
 obj-$(CONFIG_FUNCTION_GRAPH_TRACER)	+= ftrace.o insn.o
 obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o insn.o patch.o
 obj-$(CONFIG_KEXEC)		+= machine_kexec.o relocate_kernel.o
-obj-$(CONFIG_UPROBES)		+= probes.o probes-arm.o uprobes.o uprobes-arm.o
-obj-$(CONFIG_KPROBES)		+= probes.o kprobes.o kprobes-common.o patch.o
-ifdef CONFIG_THUMB2_KERNEL
-obj-$(CONFIG_KPROBES)		+= kprobes-thumb.o probes-thumb.o
-else
-obj-$(CONFIG_KPROBES)		+= kprobes-arm.o probes-arm.o
-endif
-obj-$(CONFIG_ARM_KPROBES_TEST)	+= test-kprobes.o
-test-kprobes-objs		:= kprobes-test.o
-ifdef CONFIG_THUMB2_KERNEL
-test-kprobes-objs		+= kprobes-test-thumb.o
-else
-test-kprobes-objs		+= kprobes-test-arm.o
-endif
+# Main staffs in KPROBES are in arch/arm/probes/ .
+obj-$(CONFIG_KPROBES)		+= patch.o
 obj-$(CONFIG_OABI_COMPAT)	+= sys_oabi-compat.o
 obj-$(CONFIG_ARM_THUMBEE)	+= thumbee.o
 obj-$(CONFIG_KGDB)		+= kgdb.o patch.o

arch/arm/kernel/jump_label.c

@@ -1,8 +1,8 @@
 #include <linux/kernel.h>
 #include <linux/jump_label.h>
+#include <asm/patch.h>
 
 #include "insn.h"
-#include "patch.h"
 
 #ifdef HAVE_JUMP_LABEL
 

arch/arm/kernel/kgdb.c

@@ -14,10 +14,9 @@
 #include <linux/kgdb.h>
 #include <linux/uaccess.h>
 
+#include <asm/patch.h>
 #include <asm/traps.h>
 
-#include "patch.h"
-
 struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =
 {
 	{ "r0", 4, offsetof(struct pt_regs, ARM_r0)},

arch/arm/kernel/patch.c

@@ -8,8 +8,7 @@
 #include <asm/fixmap.h>
 #include <asm/smp_plat.h>
 #include <asm/opcodes.h>
-
-#include "patch.h"
+#include <asm/patch.h>
 
 struct patch {
 	void *addr;

arch/arm/probes/Makefile

@@ -0,0 +1,7 @@
+obj-$(CONFIG_UPROBES)		+= decode.o decode-arm.o uprobes/
+obj-$(CONFIG_KPROBES)		+= decode.o kprobes/
+ifdef CONFIG_THUMB2_KERNEL
+obj-$(CONFIG_KPROBES)		+= decode-thumb.o
+else
+obj-$(CONFIG_KPROBES)		+= decode-arm.o
+endif

arch/arm/probes/decode-arm.c

@@ -1,5 +1,6 @@
 /*
- * arch/arm/kernel/probes-arm.c
+ *
+ * arch/arm/probes/decode-arm.c
  *
  * Some code moved here from arch/arm/kernel/kprobes-arm.c
  *
@@ -20,8 +21,8 @@
 #include <linux/stddef.h>
 #include <linux/ptrace.h>
 
-#include "probes.h"
-#include "probes-arm.h"
+#include "decode.h"
+#include "decode-arm.h"
 
 #define sign_extend(x, signbit) ((x) | (0 - ((x) & (1 << (signbit)))))
 

arch/arm/probes/decode-arm.h

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/probes-arm.h
+ * arch/arm/probes/decode-arm.h
  *
  * Copyright 2013 Linaro Ltd.
  * Written by: David A. Long
@@ -15,6 +15,8 @@
 #ifndef _ARM_KERNEL_PROBES_ARM_H
 #define  _ARM_KERNEL_PROBES_ARM_H
 
+#include "decode.h"
+
 enum probes_arm_action {
 	PROBES_EMULATE_NONE,
 	PROBES_SIMULATE_NOP,

arch/arm/probes/decode-thumb.c

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/probes-thumb.c
+ * arch/arm/probes/decode-thumb.c
  *
  * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
  *
@@ -12,8 +12,8 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 
-#include "probes.h"
-#include "probes-thumb.h"
+#include "decode.h"
+#include "decode-thumb.h"
 
 
 static const union decode_item t32_table_1110_100x_x0xx[] = {

arch/arm/probes/decode-thumb.h

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/probes-thumb.h
+ * arch/arm/probes/decode-thumb.h
  *
  * Copyright 2013 Linaro Ltd.
  * Written by: David A. Long
@@ -15,6 +15,8 @@
 #ifndef _ARM_KERNEL_PROBES_THUMB_H
 #define  _ARM_KERNEL_PROBES_THUMB_H
 
+#include "decode.h"
+
 /*
  * True if current instruction is in an IT block.
  */

arch/arm/probes/decode.c

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/probes.c
+ * arch/arm/probes/decode.c
  *
  * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
  *
@@ -17,7 +17,7 @@
 #include <asm/ptrace.h>
 #include <linux/bug.h>
 
-#include "probes.h"
+#include "decode.h"
 
 
 #ifndef find_str_pc_offset

arch/arm/probes/decode.h

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/probes.h
+ * arch/arm/probes/decode.h
  *
  * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
  *

arch/arm/probes/kprobes/Makefile

@@ -0,0 +1,11 @@
+obj-$(CONFIG_KPROBES)		+= core.o actions-common.o
+obj-$(CONFIG_ARM_KPROBES_TEST)	+= test-kprobes.o
+test-kprobes-objs		:= test-core.o
+
+ifdef CONFIG_THUMB2_KERNEL
+obj-$(CONFIG_KPROBES)		+= actions-thumb.o
+test-kprobes-objs		+= test-thumb.o
+else
+obj-$(CONFIG_KPROBES)		+= actions-arm.o
+test-kprobes-objs		+= test-arm.o
+endif

arch/arm/probes/kprobes/actions-arm.c

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/kprobes-decode.c
+ * arch/arm/probes/kprobes/actions-arm.c
  *
  * Copyright (C) 2006, 2007 Motorola Inc.
  *
@@ -62,8 +62,8 @@
 #include <linux/kprobes.h>
 #include <linux/ptrace.h>
 
-#include "kprobes.h"
-#include "probes-arm.h"
+#include "../decode-arm.h"
+#include "core.h"
 
 #if  __LINUX_ARM_ARCH__ >= 6
 #define BLX(reg)	"blx	"reg"		\n\t"

arch/arm/probes/kprobes/actions-common.c

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/kprobes-common.c
+ * arch/arm/probes/kprobes/actions-common.c
  *
  * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
  *
@@ -15,7 +15,7 @@
 #include <linux/kprobes.h>
 #include <asm/opcodes.h>
 
-#include "kprobes.h"
+#include "core.h"
 
 
 static void __kprobes simulate_ldm1stm1(probes_opcode_t insn,

arch/arm/probes/kprobes/actions-thumb.c

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/kprobes-thumb.c
+ * arch/arm/probes/kprobes/actions-thumb.c
  *
  * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
  *
@@ -13,8 +13,8 @@
 #include <linux/ptrace.h>
 #include <linux/kprobes.h>
 
-#include "kprobes.h"
-#include "probes-thumb.h"
+#include "../decode-thumb.h"
+#include "core.h"
 
 /* These emulation encodings are functionally equivalent... */
 #define t32_emulate_rd8rn16rm0ra12_noflags \

arch/arm/probes/kprobes/core.c

@@ -30,11 +30,11 @@
 #include <asm/cacheflush.h>
 #include <linux/percpu.h>
 #include <linux/bug.h>
+#include <asm/patch.h>
 
-#include "kprobes.h"
-#include "probes-arm.h"
-#include "probes-thumb.h"
-#include "patch.h"
+#include "../decode-arm.h"
+#include "../decode-thumb.h"
+#include "core.h"
 
 #define MIN_STACK_SIZE(addr) 				\
 	min((unsigned long)MAX_STACK_SIZE,		\

arch/arm/probes/kprobes/core.h

@@ -19,7 +19,8 @@
 #ifndef _ARM_KERNEL_KPROBES_H
 #define _ARM_KERNEL_KPROBES_H
 
-#include "probes.h"
+#include <asm/kprobes.h>
+#include "../decode.h"
 
 /*
  * These undefined instructions must be unique and

arch/arm/probes/kprobes/test-arm.c

@@ -13,7 +13,7 @@
 #include <asm/system_info.h>
 #include <asm/opcodes.h>
 
-#include "kprobes-test.h"
+#include "test-core.h"
 
 
 #define TEST_ISA "32"

arch/arm/probes/kprobes/test-core.c

@@ -209,10 +209,10 @@
 #include <linux/bug.h>
 #include <asm/opcodes.h>
 
-#include "kprobes.h"
-#include "probes-arm.h"
-#include "probes-thumb.h"
-#include "kprobes-test.h"
+#include "core.h"
+#include "test-core.h"
+#include "../decode-arm.h"
+#include "../decode-thumb.h"
 
 
 #define BENCHMARKING	1

arch/arm/probes/kprobes/test-core.h

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/kprobes-test.h
+ * arch/arm/probes/kprobes/test-core.h
  *
  * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
  *

arch/arm/probes/kprobes/test-thumb.c

@@ -1,5 +1,5 @@
 /*
- * arch/arm/kernel/kprobes-test-thumb.c
+ * arch/arm/probes/kprobes/test-thumb.c
  *
  * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
  *
@@ -12,7 +12,7 @@
 #include <linux/module.h>
 #include <asm/opcodes.h>
 
-#include "kprobes-test.h"
+#include "test-core.h"
 
 
 #define TEST_ISA "16"

arch/arm/probes/uprobes/Makefile

@@ -0,0 +1 @@
+obj-$(CONFIG_UPROBES)		+= core.o actions-arm.o

arch/arm/probes/uprobes/actions-arm.c

@@ -13,9 +13,9 @@
 #include <linux/uprobes.h>
 #include <linux/module.h>
 
-#include "probes.h"
-#include "probes-arm.h"
-#include "uprobes.h"
+#include "../decode.h"
+#include "../decode-arm.h"
+#include "core.h"
 
 static int uprobes_substitute_pc(unsigned long *pinsn, u32 oregs)
 {

arch/arm/probes/uprobes/core.c

@@ -17,9 +17,9 @@
 #include <asm/opcodes.h>
 #include <asm/traps.h>
 
-#include "probes.h"
-#include "probes-arm.h"
-#include "uprobes.h"
+#include "../decode.h"
+#include "../decode-arm.h"
+#include "core.h"
 
 #define UPROBE_TRAP_NR	UINT_MAX