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>

1 files changed, 0 insertions, 1713 deletions

diff --git a/arch/arm/kernel/kprobes-test.c b/arch/arm/kernel/kprobes-test.c
deleted file mode 100644
index b206d7790c77..000000000000
--- a/arch/arm/kernel/kprobes-test.c
+++ /dev/null
@@ -1,1713 +0,0 @@
-/*
- * arch/arm/kernel/kprobes-test.c
- *
- * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
- *
- * 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 file contains test code for ARM kprobes.
- *
- * The top level function run_all_tests() executes tests for all of the
- * supported instruction sets: ARM, 16-bit Thumb, and 32-bit Thumb. These tests
- * fall into two categories; run_api_tests() checks basic functionality of the
- * kprobes API, and run_test_cases() is a comprehensive test for kprobes
- * instruction decoding and simulation.
- *
- * run_test_cases() first checks the kprobes decoding table for self consistency
- * (using table_test()) then executes a series of test cases for each of the CPU
- * instruction forms. coverage_start() and coverage_end() are used to verify
- * that these test cases cover all of the possible combinations of instructions
- * described by the kprobes decoding tables.
- *
- * The individual test cases are in kprobes-test-arm.c and kprobes-test-thumb.c
- * which use the macros defined in kprobes-test.h. The rest of this
- * documentation will describe the operation of the framework used by these
- * test cases.
- */
-
-/*
- * TESTING METHODOLOGY
- * -------------------
- *
- * The methodology used to test an ARM instruction 'test_insn' is to use
- * inline assembler like:
- *
- * test_before: nop
- * test_case:	test_insn
- * test_after:	nop
- *
- * When the test case is run a kprobe is placed of each nop. The
- * post-handler of the test_before probe is used to modify the saved CPU
- * register context to that which we require for the test case. The
- * pre-handler of the of the test_after probe saves a copy of the CPU
- * register context. In this way we can execute test_insn with a specific
- * register context and see the results afterwards.
- *
- * To actually test the kprobes instruction emulation we perform the above
- * step a second time but with an additional kprobe on the test_case
- * instruction itself. If the emulation is accurate then the results seen
- * by the test_after probe will be identical to the first run which didn't
- * have a probe on test_case.
- *
- * Each test case is run several times with a variety of variations in the
- * flags value of stored in CPSR, and for Thumb code, different ITState.
- *
- * For instructions which can modify PC, a second test_after probe is used
- * like this:
- *
- * test_before: nop
- * test_case:	test_insn
- * test_after:	nop
- *		b test_done
- * test_after2: nop
- * test_done:
- *
- * The test case is constructed such that test_insn branches to
- * test_after2, or, if testing a conditional instruction, it may just
- * continue to test_after. The probes inserted at both locations let us
- * determine which happened. A similar approach is used for testing
- * backwards branches...
- *
- *		b test_before
- *		b test_done  @ helps to cope with off by 1 branches
- * test_after2: nop
- *		b test_done
- * test_before: nop
- * test_case:	test_insn
- * test_after:	nop
- * test_done:
- *
- * The macros used to generate the assembler instructions describe above
- * are TEST_INSTRUCTION, TEST_BRANCH_F (branch forwards) and TEST_BRANCH_B
- * (branch backwards). In these, the local variables numbered 1, 50, 2 and
- * 99 represent: test_before, test_case, test_after2 and test_done.
- *
- * FRAMEWORK
- * ---------
- *
- * Each test case is wrapped between the pair of macros TESTCASE_START and
- * TESTCASE_END. As well as performing the inline assembler boilerplate,
- * these call out to the kprobes_test_case_start() and
- * kprobes_test_case_end() functions which drive the execution of the test
- * case. The specific arguments to use for each test case are stored as
- * inline data constructed using the various TEST_ARG_* macros. Putting
- * this all together, a simple test case may look like:
- *
- *	TESTCASE_START("Testing mov r0, r7")
- *	TEST_ARG_REG(7, 0x12345678) // Set r7=0x12345678
- *	TEST_ARG_END("")
- *	TEST_INSTRUCTION("mov r0, r7")
- *	TESTCASE_END
- *
- * Note, in practice the single convenience macro TEST_R would be used for this
- * instead.
- *
- * The above would expand to assembler looking something like:
- *
- *	@ TESTCASE_START
- *	bl	__kprobes_test_case_start
- *	.pushsection .rodata
- *	"10:
- *	.ascii "mov r0, r7"	@ text title for test case
- *	.byte	0
- *	.popsection
- *	@ start of inline data...
- *	.word	10b		@ pointer to title in .rodata section
- *
- *	@ TEST_ARG_REG
- *	.byte	ARG_TYPE_REG
- *	.byte	7
- *	.short	0
- *	.word	0x1234567
- *
- *	@ TEST_ARG_END
- *	.byte	ARG_TYPE_END
- *	.byte	TEST_ISA	@ flags, including ISA being tested
- *	.short	50f-0f		@ offset of 'test_before'
- *	.short	2f-0f		@ offset of 'test_after2' (if relevent)
- *	.short	99f-0f		@ offset of 'test_done'
- *	@ start of test case code...
- *	0:
- *	.code	TEST_ISA	@ switch to ISA being tested
- *
- *	@ TEST_INSTRUCTION
- *	50:	nop		@ location for 'test_before' probe
- *	1:	mov r0, r7	@ the test case instruction 'test_insn'
- *		nop		@ location for 'test_after' probe
- *
- *	// TESTCASE_END
- *	2:
- *	99:	bl __kprobes_test_case_end_##TEST_ISA
- *	.code	NONMAL_ISA
- *
- * When the above is execute the following happens...
- *
- * __kprobes_test_case_start() is an assembler wrapper which sets up space
- * for a stack buffer and calls the C function kprobes_test_case_start().
- * This C function will do some initial processing of the inline data and
- * setup some global state. It then inserts the test_before and test_after
- * kprobes and returns a value which causes the assembler wrapper to jump
- * to the start of the test case code, (local label '0').
- *
- * When the test case code executes, the test_before probe will be hit and
- * test_before_post_handler will call setup_test_context(). This fills the
- * stack buffer and CPU registers with a test pattern and then processes
- * the test case arguments. In our example there is one TEST_ARG_REG which
- * indicates that R7 should be loaded with the value 0x12345678.
- *
- * When the test_before probe ends, the test case continues and executes
- * the "mov r0, r7" instruction. It then hits the test_after probe and the
- * pre-handler for this (test_after_pre_handler) will save a copy of the
- * CPU register context. This should now have R0 holding the same value as
- * R7.
- *
- * Finally we get to the call to __kprobes_test_case_end_{32,16}. This is
- * an assembler wrapper which switches back to the ISA used by the test
- * code and calls the C function kprobes_test_case_end().
- *
- * For each run through the test case, test_case_run_count is incremented
- * by one. For even runs, kprobes_test_case_end() saves a copy of the
- * register and stack buffer contents from the test case just run. It then
- * inserts a kprobe on the test case instruction 'test_insn' and returns a
- * value to cause the test case code to be re-run.
- *
- * For odd numbered runs, kprobes_test_case_end() compares the register and
- * stack buffer contents to those that were saved on the previous even
- * numbered run (the one without the kprobe on test_insn). These should be
- * the same if the kprobe instruction simulation routine is correct.
- *
- * The pair of test case runs is repeated with different combinations of
- * flag values in CPSR and, for Thumb, different ITState. This is
- * controlled by test_context_cpsr().
- *
- * BUILDING TEST CASES
- * -------------------
- *
- *
- * As an aid to building test cases, the stack buffer is initialised with
- * some special values:
- *
- *   [SP+13*4]	Contains SP+120. This can be used to test instructions
- *		which load a value into SP.
- *
- *   [SP+15*4]	When testing branching instructions using TEST_BRANCH_{F,B},
- *		this holds the target address of the branch, 'test_after2'.
- *		This can be used to test instructions which load a PC value
- *		from memory.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/kprobes.h>
-#include <linux/errno.h>
-#include <linux/stddef.h>
-#include <linux/bug.h>
-#include <asm/opcodes.h>
-
-#include "kprobes.h"
-#include "probes-arm.h"
-#include "probes-thumb.h"
-#include "kprobes-test.h"
-
-
-#define BENCHMARKING	1
-
-
-/*
- * Test basic API
- */
-
-static bool test_regs_ok;
-static int test_func_instance;
-static int pre_handler_called;
-static int post_handler_called;
-static int jprobe_func_called;
-static int kretprobe_handler_called;
-static int tests_failed;
-
-#define FUNC_ARG1 0x12345678
-#define FUNC_ARG2 0xabcdef
-
-
-#ifndef CONFIG_THUMB2_KERNEL
-
-long arm_func(long r0, long r1);
-
-static void __used __naked __arm_kprobes_test_func(void)
-{
-	__asm__ __volatile__ (
-		".arm					\n\t"
-		".type arm_func, %%function		\n\t"
-		"arm_func:				\n\t"
-		"adds	r0, r0, r1			\n\t"
-		"bx	lr				\n\t"
-		".code "NORMAL_ISA	 /* Back to Thumb if necessary */
-		: : : "r0", "r1", "cc"
-	);
-}
-
-#else /* CONFIG_THUMB2_KERNEL */
-
-long thumb16_func(long r0, long r1);
-long thumb32even_func(long r0, long r1);
-long thumb32odd_func(long r0, long r1);
-
-static void __used __naked __thumb_kprobes_test_funcs(void)
-{
-	__asm__ __volatile__ (
-		".type thumb16_func, %%function		\n\t"
-		"thumb16_func:				\n\t"
-		"adds.n	r0, r0, r1			\n\t"
-		"bx	lr				\n\t"
-
-		".align					\n\t"
-		".type thumb32even_func, %%function	\n\t"
-		"thumb32even_func:			\n\t"
-		"adds.w	r0, r0, r1			\n\t"
-		"bx	lr				\n\t"
-
-		".align					\n\t"
-		"nop.n					\n\t"
-		".type thumb32odd_func, %%function	\n\t"
-		"thumb32odd_func:			\n\t"
-		"adds.w	r0, r0, r1			\n\t"
-		"bx	lr				\n\t"
-
-		: : : "r0", "r1", "cc"
-	);
-}
-
-#endif /* CONFIG_THUMB2_KERNEL */
-
-
-static int call_test_func(long (*func)(long, long), bool check_test_regs)
-{
-	long ret;
-
-	++test_func_instance;
-	test_regs_ok = false;
-
-	ret = (*func)(FUNC_ARG1, FUNC_ARG2);
-	if (ret != FUNC_ARG1 + FUNC_ARG2) {
-		pr_err("FAIL: call_test_func: func returned %lx\n", ret);
-		return false;
-	}
-
-	if (check_test_regs && !test_regs_ok) {
-		pr_err("FAIL: test regs not OK\n");
-		return false;
-	}
-
-	return true;
-}
-
-static int __kprobes pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
-	pre_handler_called = test_func_instance;
-	if (regs->ARM_r0 == FUNC_ARG1 && regs->ARM_r1 == FUNC_ARG2)
-		test_regs_ok = true;
-	return 0;
-}
-
-static void __kprobes post_handler(struct kprobe *p, struct pt_regs *regs,
-				unsigned long flags)
-{
-	post_handler_called = test_func_instance;
-	if (regs->ARM_r0 != FUNC_ARG1 + FUNC_ARG2 || regs->ARM_r1 != FUNC_ARG2)
-		test_regs_ok = false;
-}
-
-static struct kprobe the_kprobe = {
-	.addr		= 0,
-	.pre_handler	= pre_handler,
-	.post_handler	= post_handler
-};
-
-static int test_kprobe(long (*func)(long, long))
-{
-	int ret;
-
-	the_kprobe.addr = (kprobe_opcode_t *)func;
-	ret = register_kprobe(&the_kprobe);
-	if (ret < 0) {
-		pr_err("FAIL: register_kprobe failed with %d\n", ret);
-		return ret;
-	}
-
-	ret = call_test_func(func, true);
-
-	unregister_kprobe(&the_kprobe);
-	the_kprobe.flags = 0; /* Clear disable flag to allow reuse */
-
-	if (!ret)
-		return -EINVAL;
-	if (pre_handler_called != test_func_instance) {
-		pr_err("FAIL: kprobe pre_handler not called\n");
-		return -EINVAL;
-	}
-	if (post_handler_called != test_func_instance) {
-		pr_err("FAIL: kprobe post_handler not called\n");
-		return -EINVAL;
-	}
-	if (!call_test_func(func, false))
-		return -EINVAL;
-	if (pre_handler_called == test_func_instance ||
-				post_handler_called == test_func_instance) {
-		pr_err("FAIL: probe called after unregistering\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static void __kprobes jprobe_func(long r0, long r1)
-{
-	jprobe_func_called = test_func_instance;
-	if (r0 == FUNC_ARG1 && r1 == FUNC_ARG2)
-		test_regs_ok = true;
-	jprobe_return();
-}
-
-static struct jprobe the_jprobe = {
-	.entry		= jprobe_func,
-};
-
-static int test_jprobe(long (*func)(long, long))
-{
-	int ret;
-
-	the_jprobe.kp.addr = (kprobe_opcode_t *)func;
-	ret = register_jprobe(&the_jprobe);
-	if (ret < 0) {
-		pr_err("FAIL: register_jprobe failed with %d\n", ret);
-		return ret;
-	}
-
-	ret = call_test_func(func, true);
-
-	unregister_jprobe(&the_jprobe);
-	the_jprobe.kp.flags = 0; /* Clear disable flag to allow reuse */
-
-	if (!ret)
-		return -EINVAL;
-	if (jprobe_func_called != test_func_instance) {
-		pr_err("FAIL: jprobe handler function not called\n");
-		return -EINVAL;
-	}
-	if (!call_test_func(func, false))
-		return -EINVAL;
-	if (jprobe_func_called == test_func_instance) {
-		pr_err("FAIL: probe called after unregistering\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int __kprobes
-kretprobe_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
-{
-	kretprobe_handler_called = test_func_instance;
-	if (regs_return_value(regs) == FUNC_ARG1 + FUNC_ARG2)
-		test_regs_ok = true;
-	return 0;
-}
-
-static struct kretprobe the_kretprobe = {
-	.handler	= kretprobe_handler,
-};
-
-static int test_kretprobe(long (*func)(long, long))
-{
-	int ret;
-
-	the_kretprobe.kp.addr = (kprobe_opcode_t *)func;
-	ret = register_kretprobe(&the_kretprobe);
-	if (ret < 0) {
-		pr_err("FAIL: register_kretprobe failed with %d\n", ret);
-		return ret;
-	}
-
-	ret = call_test_func(func, true);
-
-	unregister_kretprobe(&the_kretprobe);
-	the_kretprobe.kp.flags = 0; /* Clear disable flag to allow reuse */
-
-	if (!ret)
-		return -EINVAL;
-	if (kretprobe_handler_called != test_func_instance) {
-		pr_err("FAIL: kretprobe handler not called\n");
-		return -EINVAL;
-	}
-	if (!call_test_func(func, false))
-		return -EINVAL;
-	if (jprobe_func_called == test_func_instance) {
-		pr_err("FAIL: kretprobe called after unregistering\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int run_api_tests(long (*func)(long, long))
-{
-	int ret;
-
-	pr_info("    kprobe\n");
-	ret = test_kprobe(func);
-	if (ret < 0)
-		return ret;
-
-	pr_info("    jprobe\n");
-	ret = test_jprobe(func);
-#if defined(CONFIG_THUMB2_KERNEL) && !defined(MODULE)
-	if (ret == -EINVAL) {
-		pr_err("FAIL: Known longtime bug with jprobe on Thumb kernels\n");
-		tests_failed = ret;
-		ret = 0;
-	}
-#endif
-	if (ret < 0)
-		return ret;
-
-	pr_info("    kretprobe\n");
-	ret = test_kretprobe(func);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-
-/*
- * Benchmarking
- */
-
-#if BENCHMARKING
-
-static void __naked benchmark_nop(void)
-{
-	__asm__ __volatile__ (
-		"nop		\n\t"
-		"bx	lr"
-	);
-}
-
-#ifdef CONFIG_THUMB2_KERNEL
-#define wide ".w"
-#else
-#define wide
-#endif
-
-static void __naked benchmark_pushpop1(void)
-{
-	__asm__ __volatile__ (
-		"stmdb"wide"	sp!, {r3-r11,lr}  \n\t"
-		"ldmia"wide"	sp!, {r3-r11,pc}"
-	);
-}
-
-static void __naked benchmark_pushpop2(void)
-{
-	__asm__ __volatile__ (
-		"stmdb"wide"	sp!, {r0-r8,lr}  \n\t"
-		"ldmia"wide"	sp!, {r0-r8,pc}"
-	);
-}
-
-static void __naked benchmark_pushpop3(void)
-{
-	__asm__ __volatile__ (
-		"stmdb"wide"	sp!, {r4,lr}  \n\t"
-		"ldmia"wide"	sp!, {r4,pc}"
-	);
-}
-
-static void __naked benchmark_pushpop4(void)
-{
-	__asm__ __volatile__ (
-		"stmdb"wide"	sp!, {r0,lr}  \n\t"
-		"ldmia"wide"	sp!, {r0,pc}"
-	);
-}
-
-
-#ifdef CONFIG_THUMB2_KERNEL
-
-static void __naked benchmark_pushpop_thumb(void)
-{
-	__asm__ __volatile__ (
-		"push.n	{r0-r7,lr}  \n\t"
-		"pop.n	{r0-r7,pc}"
-	);
-}
-
-#endif
-
-static int __kprobes
-benchmark_pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
-	return 0;
-}
-
-static int benchmark(void(*fn)(void))
-{
-	unsigned n, i, t, t0;
-
-	for (n = 1000; ; n *= 2) {
-		t0 = sched_clock();
-		for (i = n; i > 0; --i)
-			fn();
-		t = sched_clock() - t0;
-		if (t >= 250000000)
-			break; /* Stop once we took more than 0.25 seconds */
-	}
-	return t / n; /* Time for one iteration in nanoseconds */
-};
-
-static int kprobe_benchmark(void(*fn)(void), unsigned offset)
-{
-	struct kprobe k = {
-		.addr		= (kprobe_opcode_t *)((uintptr_t)fn + offset),
-		.pre_handler	= benchmark_pre_handler,
-	};
-
-	int ret = register_kprobe(&k);
-	if (ret < 0) {
-		pr_err("FAIL: register_kprobe failed with %d\n", ret);
-		return ret;
-	}
-
-	ret = benchmark(fn);
-
-	unregister_kprobe(&k);
-	return ret;
-};
-
-struct benchmarks {
-	void		(*fn)(void);
-	unsigned	offset;
-	const char	*title;
-};
-
-static int run_benchmarks(void)
-{
-	int ret;
-	struct benchmarks list[] = {
-		{&benchmark_nop, 0, "nop"},
-		/*
-		 * benchmark_pushpop{1,3} will have the optimised
-		 * instruction emulation, whilst benchmark_pushpop{2,4} will
-		 * be the equivalent unoptimised instructions.
-		 */
-		{&benchmark_pushpop1, 0, "stmdb	sp!, {r3-r11,lr}"},
-		{&benchmark_pushpop1, 4, "ldmia	sp!, {r3-r11,pc}"},
-		{&benchmark_pushpop2, 0, "stmdb	sp!, {r0-r8,lr}"},
-		{&benchmark_pushpop2, 4, "ldmia	sp!, {r0-r8,pc}"},
-		{&benchmark_pushpop3, 0, "stmdb	sp!, {r4,lr}"},
-		{&benchmark_pushpop3, 4, "ldmia	sp!, {r4,pc}"},
-		{&benchmark_pushpop4, 0, "stmdb	sp!, {r0,lr}"},
-		{&benchmark_pushpop4, 4, "ldmia	sp!, {r0,pc}"},
-#ifdef CONFIG_THUMB2_KERNEL
-		{&benchmark_pushpop_thumb, 0, "push.n	{r0-r7,lr}"},
-		{&benchmark_pushpop_thumb, 2, "pop.n	{r0-r7,pc}"},
-#endif
-		{0}
-	};
-
-	struct benchmarks *b;
-	for (b = list; b->fn; ++b) {
-		ret = kprobe_benchmark(b->fn, b->offset);
-		if (ret < 0)
-			return ret;
-		pr_info("    %dns for kprobe %s\n", ret, b->title);
-	}
-
-	pr_info("\n");
-	return 0;
-}
-
-#endif /* BENCHMARKING */
-
-
-/*
- * Decoding table self-consistency tests
- */
-
-static const int decode_struct_sizes[NUM_DECODE_TYPES] = {
-	[DECODE_TYPE_TABLE]	= sizeof(struct decode_table),
-	[DECODE_TYPE_CUSTOM]	= sizeof(struct decode_custom),
-	[DECODE_TYPE_SIMULATE]	= sizeof(struct decode_simulate),
-	[DECODE_TYPE_EMULATE]	= sizeof(struct decode_emulate),
-	[DECODE_TYPE_OR]	= sizeof(struct decode_or),
-	[DECODE_TYPE_REJECT]	= sizeof(struct decode_reject)
-};
-
-static int table_iter(const union decode_item *table,
-			int (*fn)(const struct decode_header *, void *),
-			void *args)
-{
-	const struct decode_header *h = (struct decode_header *)table;
-	int result;
-
-	for (;;) {
-		enum decode_type type = h->type_regs.bits & DECODE_TYPE_MASK;
-
-		if (type == DECODE_TYPE_END)
-			return 0;
-
-		result = fn(h, args);
-		if (result)
-			return result;
-
-		h = (struct decode_header *)
-			((uintptr_t)h + decode_struct_sizes[type]);
-
-	}
-}
-
-static int table_test_fail(const struct decode_header *h, const char* message)
-{
-
-	pr_err("FAIL: kprobes test failure \"%s\" (mask %08x, value %08x)\n",
-					message, h->mask.bits, h->value.bits);
-	return -EINVAL;
-}
-
-struct table_test_args {
-	const union decode_item *root_table;
-	u32			parent_mask;
-	u32			parent_value;
-};
-
-static int table_test_fn(const struct decode_header *h, void *args)
-{
-	struct table_test_args *a = (struct table_test_args *)args;
-	enum decode_type type = h->type_regs.bits & DECODE_TYPE_MASK;
-
-	if (h->value.bits & ~h->mask.bits)
-		return table_test_fail(h, "Match value has bits not in mask");
-
-	if ((h->mask.bits & a->parent_mask) != a->parent_mask)
-		return table_test_fail(h, "Mask has bits not in parent mask");
-
-	if ((h->value.bits ^ a->parent_value) & a->parent_mask)
-		return table_test_fail(h, "Value is inconsistent with parent");
-
-	if (type == DECODE_TYPE_TABLE) {
-		struct decode_table *d = (struct decode_table *)h;
-		struct table_test_args args2 = *a;
-		args2.parent_mask = h->mask.bits;
-		args2.parent_value = h->value.bits;
-		return table_iter(d->table.table, table_test_fn, &args2);
-	}
-
-	return 0;
-}
-
-static int table_test(const union decode_item *table)
-{
-	struct table_test_args args = {
-		.root_table	= table,
-		.parent_mask	= 0,
-		.parent_value	= 0
-	};
-	return table_iter(args.root_table, table_test_fn, &args);
-}
-
-
-/*
- * Decoding table test coverage analysis
- *
- * coverage_start() builds a coverage_table which contains a list of
- * coverage_entry's to match each entry in the specified kprobes instruction
- * decoding table.
- *
- * When test cases are run, coverage_add() is called to process each case.
- * This looks up the corresponding entry in the coverage_table and sets it as
- * being matched, as well as clearing the regs flag appropriate for the test.
- *
- * After all test cases have been run, coverage_end() is called to check that
- * all entries in coverage_table have been matched and that all regs flags are
- * cleared. I.e. that all possible combinations of instructions described by
- * the kprobes decoding tables have had a test case executed for them.
- */
-
-bool coverage_fail;
-
-#define MAX_COVERAGE_ENTRIES 256
-
-struct coverage_entry {
-	const struct decode_header	*header;
-	unsigned			regs;
-	unsigned			nesting;
-	char				matched;
-};
-
-struct coverage_table {
-	struct coverage_entry	*base;
-	unsigned		num_entries;
-	unsigned		nesting;
-};
-
-struct coverage_table coverage;
-
-#define COVERAGE_ANY_REG	(1<<0)
-#define COVERAGE_SP		(1<<1)
-#define COVERAGE_PC		(1<<2)
-#define COVERAGE_PCWB		(1<<3)
-
-static const char coverage_register_lookup[16] = {
-	[REG_TYPE_ANY]		= COVERAGE_ANY_REG | COVERAGE_SP | COVERAGE_PC,
-	[REG_TYPE_SAMEAS16]	= COVERAGE_ANY_REG,
-	[REG_TYPE_SP]		= COVERAGE_SP,
-	[REG_TYPE_PC]		= COVERAGE_PC,
-	[REG_TYPE_NOSP]		= COVERAGE_ANY_REG | COVERAGE_SP,
-	[REG_TYPE_NOSPPC]	= COVERAGE_ANY_REG | COVERAGE_SP | COVERAGE_PC,
-	[REG_TYPE_NOPC]		= COVERAGE_ANY_REG | COVERAGE_PC,
-	[REG_TYPE_NOPCWB]	= COVERAGE_ANY_REG | COVERAGE_PC | COVERAGE_PCWB,
-	[REG_TYPE_NOPCX]	= COVERAGE_ANY_REG,
-	[REG_TYPE_NOSPPCX]	= COVERAGE_ANY_REG | COVERAGE_SP,
-};
-
-unsigned coverage_start_registers(const struct decode_header *h)
-{
-	unsigned regs = 0;
-	int i;
-	for (i = 0; i < 20; i += 4) {
-		int r = (h->type_regs.bits >> (DECODE_TYPE_BITS + i)) & 0xf;
-		regs |= coverage_register_lookup[r] << i;
-	}
-	return regs;
-}
-
-static int coverage_start_fn(const struct decode_header *h, void *args)
-{
-	struct coverage_table *coverage = (struct coverage_table *)args;
-	enum decode_type type = h->type_regs.bits & DECODE_TYPE_MASK;
-	struct coverage_entry *entry = coverage->base + coverage->num_entries;
-
-	if (coverage->num_entries == MAX_COVERAGE_ENTRIES - 1) {
-		pr_err("FAIL: Out of space for test coverage data");
-		return -ENOMEM;
-	}
-
-	++coverage->num_entries;
-
-	entry->header = h;
-	entry->regs = coverage_start_registers(h);
-	entry->nesting = coverage->nesting;
-	entry->matched = false;
-
-	if (type == DECODE_TYPE_TABLE) {
-		struct decode_table *d = (struct decode_table *)h;
-		int ret;
-		++coverage->nesting;
-		ret = table_iter(d->table.table, coverage_start_fn, coverage);
-		--coverage->nesting;
-		return ret;
-	}
-
-	return 0;
-}
-
-static int coverage_start(const union decode_item *table)
-{
-	coverage.base = kmalloc(MAX_COVERAGE_ENTRIES *
-				sizeof(struct coverage_entry), GFP_KERNEL);
-	coverage.num_entries = 0;
-	coverage.nesting = 0;
-	return table_iter(table, coverage_start_fn, &coverage);
-}
-
-static void
-coverage_add_registers(struct coverage_entry *entry, kprobe_opcode_t insn)
-{
-	int regs = entry->header->type_regs.bits >> DECODE_TYPE_BITS;
-	int i;
-	for (i = 0; i < 20; i += 4) {
-		enum decode_reg_type reg_type = (regs >> i) & 0xf;
-		int reg = (insn >> i) & 0xf;
-		int flag;
-
-		if (!reg_type)
-			continue;
-
-		if (reg == 13)
-			flag = COVERAGE_SP;
-		else if (reg == 15)
-			flag = COVERAGE_PC;
-		else
-			flag = COVERAGE_ANY_REG;
-		entry->regs &= ~(flag << i);
-
-		switch (reg_type) {
-
-		case REG_TYPE_NONE:
-		case REG_TYPE_ANY:
-		case REG_TYPE_SAMEAS16:
-			break;
-
-		case REG_TYPE_SP:
-			if (reg != 13)
-				return;
-			break;
-
-		case REG_TYPE_PC:
-			if (reg != 15)
-				return;
-			break;
-
-		case REG_TYPE_NOSP:
-			if (reg == 13)
-				return;
-			break;
-
-		case REG_TYPE_NOSPPC:
-		case REG_TYPE_NOSPPCX:
-			if (reg == 13 || reg == 15)
-				return;
-			break;
-
-		case REG_TYPE_NOPCWB:
-			if (!is_writeback(insn))
-				break;
-			if (reg == 15) {
-				entry->regs &= ~(COVERAGE_PCWB << i);
-				return;
-			}
-			break;
-
-		case REG_TYPE_NOPC:
-		case REG_TYPE_NOPCX:
-			if (reg == 15)
-				return;
-			break;
-		}
-
-	}
-}
-
-static void coverage_add(kprobe_opcode_t insn)
-{
-	struct coverage_entry *entry = coverage.base;
-	struct coverage_entry *end = coverage.base + coverage.num_entries;
-	bool matched = false;
-	unsigned nesting = 0;
-
-	for (; entry < end; ++entry) {
-		const struct decode_header *h = entry->header;
-		enum decode_type type = h->type_regs.bits & DECODE_TYPE_MASK;
-
-		if (entry->nesting > nesting)
-			continue; /* Skip sub-table we didn't match */
-
-		if (entry->nesting < nesting)
-			break; /* End of sub-table we were scanning */
-
-		if (!matched) {
-			if ((insn & h->mask.bits) != h->value.bits)
-				continue;
-			entry->matched = true;
-		}
-
-		switch (type) {
-
-		case DECODE_TYPE_TABLE:
-			++nesting;
-			break;
-
-		case DECODE_TYPE_CUSTOM:
-		case DECODE_TYPE_SIMULATE:
-		case DECODE_TYPE_EMULATE:
-			coverage_add_registers(entry, insn);
-			return;
-
-		case DECODE_TYPE_OR:
-			matched = true;
-			break;
-
-		case DECODE_TYPE_REJECT:
-		default:
-			return;
-		}
-
-	}
-}
-
-static void coverage_end(void)
-{
-	struct coverage_entry *entry = coverage.base;
-	struct coverage_entry *end = coverage.base + coverage.num_entries;
-
-	for (; entry < end; ++entry) {
-		u32 mask = entry->header->mask.bits;
-		u32 value = entry->header->value.bits;
-
-		if (entry->regs) {
-			pr_err("FAIL: Register test coverage missing for %08x %08x (%05x)\n",
-				mask, value, entry->regs);
-			coverage_fail = true;
-		}
-		if (!entry->matched) {
-			pr_err("FAIL: Test coverage entry missing for %08x %08x\n",
-				mask, value);
-			coverage_fail = true;
-		}
-	}
-
-	kfree(coverage.base);
-}
-
-
-/*
- * Framework for instruction set test cases
- */
-
-void __naked __kprobes_test_case_start(void)
-{
-	__asm__ __volatile__ (
-		"stmdb	sp!, {r4-r11}				\n\t"
-		"sub	sp, sp, #"__stringify(TEST_MEMORY_SIZE)"\n\t"
-		"bic	r0, lr, #1  @ r0 = inline data		\n\t"
-		"mov	r1, sp					\n\t"
-		"bl	kprobes_test_case_start			\n\t"
-		"bx	r0					\n\t"
-	);
-}
-
-#ifndef CONFIG_THUMB2_KERNEL
-
-void __naked __kprobes_test_case_end_32(void)
-{
-	__asm__ __volatile__ (
-		"mov	r4, lr					\n\t"
-		"bl	kprobes_test_case_end			\n\t"
-		"cmp	r0, #0					\n\t"
-		"movne	pc, r0					\n\t"
-		"mov	r0, r4					\n\t"
-		"add	sp, sp, #"__stringify(TEST_MEMORY_SIZE)"\n\t"
-		"ldmia	sp!, {r4-r11}				\n\t"
-		"mov	pc, r0					\n\t"
-	);
-}
-
-#else /* CONFIG_THUMB2_KERNEL */
-
-void __naked __kprobes_test_case_end_16(void)
-{
-	__asm__ __volatile__ (
-		"mov	r4, lr					\n\t"
-		"bl	kprobes_test_case_end			\n\t"
-		"cmp	r0, #0					\n\t"
-		"bxne	r0					\n\t"
-		"mov	r0, r4					\n\t"
-		"add	sp, sp, #"__stringify(TEST_MEMORY_SIZE)"\n\t"
-		"ldmia	sp!, {r4-r11}				\n\t"
-		"bx	r0					\n\t"
-	);
-}
-
-void __naked __kprobes_test_case_end_32(void)
-{
-	__asm__ __volatile__ (
-		".arm						\n\t"
-		"orr	lr, lr, #1  @ will return to Thumb code	\n\t"
-		"ldr	pc, 1f					\n\t"
-		"1:						\n\t"
-		".word	__kprobes_test_case_end_16		\n\t"
-	);
-}
-
-#endif
-
-
-int kprobe_test_flags;
-int kprobe_test_cc_position;
-
-static int test_try_count;
-static int test_pass_count;
-static int test_fail_count;
-
-static struct pt_regs initial_regs;
-static struct pt_regs expected_regs;
-static struct pt_regs result_regs;
-
-static u32 expected_memory[TEST_MEMORY_SIZE/sizeof(u32)];
-
-static const char *current_title;
-static struct test_arg *current_args;
-static u32 *current_stack;
-static uintptr_t current_branch_target;
-
-static uintptr_t current_code_start;
-static kprobe_opcode_t current_instruction;
-
-
-#define TEST_CASE_PASSED -1
-#define TEST_CASE_FAILED -2
-
-static int test_case_run_count;
-static bool test_case_is_thumb;
-static int test_instance;
-
-/*
- * We ignore the state of the imprecise abort disable flag (CPSR.A) because this
- * can change randomly as the kernel doesn't take care to preserve or initialise
- * this across context switches. Also, with Security Extentions, the flag may
- * not be under control of the kernel; for this reason we ignore the state of
- * the FIQ disable flag CPSR.F as well.
- */
-#define PSR_IGNORE_BITS (PSR_A_BIT | PSR_F_BIT)
-
-static unsigned long test_check_cc(int cc, unsigned long cpsr)
-{
-	int ret = arm_check_condition(cc << 28, cpsr);
-
-	return (ret != ARM_OPCODE_CONDTEST_FAIL);
-}
-
-static int is_last_scenario;
-static int probe_should_run; /* 0 = no, 1 = yes, -1 = unknown */
-static int memory_needs_checking;
-
-static unsigned long test_context_cpsr(int scenario)
-{
-	unsigned long cpsr;
-
-	probe_should_run = 1;
-
-	/* Default case is that we cycle through 16 combinations of flags */
-	cpsr  = (scenario & 0xf) << 28; /* N,Z,C,V flags */
-	cpsr |= (scenario & 0xf) << 16; /* GE flags */
-	cpsr |= (scenario & 0x1) << 27; /* Toggle Q flag */
-
-	if (!test_case_is_thumb) {
-		/* Testing ARM code */
-		int cc = current_instruction >> 28;
-
-		probe_should_run = test_check_cc(cc, cpsr) != 0;
-		if (scenario == 15)
-			is_last_scenario = true;
-
-	} else if (kprobe_test_flags & TEST_FLAG_NO_ITBLOCK) {
-		/* Testing Thumb code without setting ITSTATE */
-		if (kprobe_test_cc_position) {
-			int cc = (current_instruction >> kprobe_test_cc_position) & 0xf;
-			probe_should_run = test_check_cc(cc, cpsr) != 0;
-		}
-
-		if (scenario == 15)
-			is_last_scenario = true;
-
-	} else if (kprobe_test_flags & TEST_FLAG_FULL_ITBLOCK) {
-		/* Testing Thumb code with all combinations of ITSTATE */
-		unsigned x = (scenario >> 4);
-		unsigned cond_base = x % 7; /* ITSTATE<7:5> */
-		unsigned mask = x / 7 + 2;  /* ITSTATE<4:0>, bits reversed */
-
-		if (mask > 0x1f) {
-			/* Finish by testing state from instruction 'itt al' */
-			cond_base = 7;
-			mask = 0x4;
-			if ((scenario & 0xf) == 0xf)
-				is_last_scenario = true;
-		}
-
-		cpsr |= cond_base << 13;	/* ITSTATE<7:5> */
-		cpsr |= (mask & 0x1) << 12;	/* ITSTATE<4> */
-		cpsr |= (mask & 0x2) << 10;	/* ITSTATE<3> */
-		cpsr |= (mask & 0x4) << 8;	/* ITSTATE<2> */
-		cpsr |= (mask & 0x8) << 23;	/* ITSTATE<1> */
-		cpsr |= (mask & 0x10) << 21;	/* ITSTATE<0> */
-
-		probe_should_run = test_check_cc((cpsr >> 12) & 0xf, cpsr) != 0;
-
-	} else {
-		/* Testing Thumb code with several combinations of ITSTATE */
-		switch (scenario) {
-		case 16: /* Clear NZCV flags and 'it eq' state (false as Z=0) */
-			cpsr = 0x00000800;
-			probe_should_run = 0;
-			break;
-		case 17: /* Set NZCV flags and 'it vc' state (false as V=1) */
-			cpsr = 0xf0007800;
-			probe_should_run = 0;
-			break;
-		case 18: /* Clear NZCV flags and 'it ls' state (true as C=0) */
-			cpsr = 0x00009800;
-			break;
-		case 19: /* Set NZCV flags and 'it cs' state (true as C=1) */
-			cpsr = 0xf0002800;
-			is_last_scenario = true;
-			break;
-		}
-	}
-
-	return cpsr;
-}
-
-static void setup_test_context(struct pt_regs *regs)
-{
-	int scenario = test_case_run_count>>1;
-	unsigned long val;
-	struct test_arg *args;
-	int i;
-
-	is_last_scenario = false;
-	memory_needs_checking = false;
-
-	/* Initialise test memory on stack */
-	val = (scenario & 1) ? VALM : ~VALM;
-	for (i = 0; i < TEST_MEMORY_SIZE / sizeof(current_stack[0]); ++i)
-		current_stack[i] = val + (i << 8);
-	/* Put target of branch on stack for tests which load PC from memory */
-	if (current_branch_target)
-		current_stack[15] = current_branch_target;
-	/* Put a value for SP on stack for tests which load SP from memory */
-	current_stack[13] = (u32)current_stack + 120;
-
-	/* Initialise register values to their default state */
-	val = (scenario & 2) ? VALR : ~VALR;
-	for (i = 0; i < 13; ++i)
-		regs->uregs[i] = val ^ (i << 8);
-	regs->ARM_lr = val ^ (14 << 8);
-	regs->ARM_cpsr &= ~(APSR_MASK | PSR_IT_MASK);
-	regs->ARM_cpsr |= test_context_cpsr(scenario);
-
-	/* Perform testcase specific register setup  */
-	args = current_args;
-	for (; args[0].type != ARG_TYPE_END; ++args)
-		switch (args[0].type) {
-		case ARG_TYPE_REG: {
-			struct test_arg_regptr *arg =
-				(struct test_arg_regptr *)args;
-			regs->uregs[arg->reg] = arg->val;
-			break;
-		}
-		case ARG_TYPE_PTR: {
-			struct test_arg_regptr *arg =
-				(struct test_arg_regptr *)args;
-			regs->uregs[arg->reg] =
-				(unsigned long)current_stack + arg->val;
-			memory_needs_checking = true;
-			break;
-		}
-		case ARG_TYPE_MEM: {
-			struct test_arg_mem *arg = (struct test_arg_mem *)args;
-			current_stack[arg->index] = arg->val;
-			break;
-		}
-		default:
-			break;
-		}
-}
-
-struct test_probe {
-	struct kprobe	kprobe;
-	bool		registered;
-	int		hit;
-};
-
-static void unregister_test_probe(struct test_probe *probe)
-{
-	if (probe->registered) {
-		unregister_kprobe(&probe->kprobe);
-		probe->kprobe.flags = 0; /* Clear disable flag to allow reuse */
-	}
-	probe->registered = false;
-}
-
-static int register_test_probe(struct test_probe *probe)
-{
-	int ret;
-
-	if (probe->registered)
-		BUG();
-
-	ret = register_kprobe(&probe->kprobe);
-	if (ret >= 0) {
-		probe->registered = true;
-		probe->hit = -1;
-	}
-	return ret;
-}
-
-static int __kprobes
-test_before_pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
-	container_of(p, struct test_probe, kprobe)->hit = test_instance;
-	return 0;
-}
-
-static void __kprobes
-test_before_post_handler(struct kprobe *p, struct pt_regs *regs,
-							unsigned long flags)
-{
-	setup_test_context(regs);
-	initial_regs = *regs;
-	initial_regs.ARM_cpsr &= ~PSR_IGNORE_BITS;
-}
-
-static int __kprobes
-test_case_pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
-	container_of(p, struct test_probe, kprobe)->hit = test_instance;
-	return 0;
-}
-
-static int __kprobes
-test_after_pre_handler(struct kprobe *p, struct pt_regs *regs)
-{
-	if (container_of(p, struct test_probe, kprobe)->hit == test_instance)
-		return 0; /* Already run for this test instance */
-
-	result_regs = *regs;
-	result_regs.ARM_cpsr &= ~PSR_IGNORE_BITS;
-
-	/* Undo any changes done to SP by the test case */
-	regs->ARM_sp = (unsigned long)current_stack;
-
-	container_of(p, struct test_probe, kprobe)->hit = test_instance;
-	return 0;
-}
-
-static struct test_probe test_before_probe = {
-	.kprobe.pre_handler	= test_before_pre_handler,
-	.kprobe.post_handler	= test_before_post_handler,
-};
-
-static struct test_probe test_case_probe = {
-	.kprobe.pre_handler	= test_case_pre_handler,
-};
-
-static struct test_probe test_after_probe = {
-	.kprobe.pre_handler	= test_after_pre_handler,
-};
-
-static struct test_probe test_after2_probe = {
-	.kprobe.pre_handler	= test_after_pre_handler,
-};
-
-static void test_case_cleanup(void)
-{
-	unregister_test_probe(&test_before_probe);
-	unregister_test_probe(&test_case_probe);
-	unregister_test_probe(&test_after_probe);
-	unregister_test_probe(&test_after2_probe);
-}
-
-static void print_registers(struct pt_regs *regs)
-{
-	pr_err("r0  %08lx | r1  %08lx | r2  %08lx | r3  %08lx\n",
-		regs->ARM_r0, regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
-	pr_err("r4  %08lx | r5  %08lx | r6  %08lx | r7  %08lx\n",
-		regs->ARM_r4, regs->ARM_r5, regs->ARM_r6, regs->ARM_r7);
-	pr_err("r8  %08lx | r9  %08lx | r10 %08lx | r11 %08lx\n",
-		regs->ARM_r8, regs->ARM_r9, regs->ARM_r10, regs->ARM_fp);
-	pr_err("r12 %08lx | sp  %08lx | lr  %08lx | pc  %08lx\n",
-		regs->ARM_ip, regs->ARM_sp, regs->ARM_lr, regs->ARM_pc);
-	pr_err("cpsr %08lx\n", regs->ARM_cpsr);
-}
-
-static void print_memory(u32 *mem, size_t size)
-{
-	int i;
-	for (i = 0; i < size / sizeof(u32); i += 4)
-		pr_err("%08x %08x %08x %08x\n", mem[i], mem[i+1],
-						mem[i+2], mem[i+3]);
-}
-
-static size_t expected_memory_size(u32 *sp)
-{
-	size_t size = sizeof(expected_memory);
-	int offset = (uintptr_t)sp - (uintptr_t)current_stack;
-	if (offset > 0)
-		size -= offset;
-	return size;
-}
-
-static void test_case_failed(const char *message)
-{
-	test_case_cleanup();
-
-	pr_err("FAIL: %s\n", message);
-	pr_err("FAIL: Test %s\n", current_title);
-	pr_err("FAIL: Scenario %d\n", test_case_run_count >> 1);
-}
-
-static unsigned long next_instruction(unsigned long pc)
-{
-#ifdef CONFIG_THUMB2_KERNEL
-	if ((pc & 1) &&
-	    !is_wide_instruction(__mem_to_opcode_thumb16(*(u16 *)(pc - 1))))
-		return pc + 2;
-	else
-#endif
-	return pc + 4;
-}
-
-static uintptr_t __used kprobes_test_case_start(const char **title, void *stack)
-{
-	struct test_arg *args;
-	struct test_arg_end *end_arg;
-	unsigned long test_code;
-
-	current_title = *title++;
-	args = (struct test_arg *)title;
-	current_args = args;
-	current_stack = stack;
-
-	++test_try_count;
-
-	while (args->type != ARG_TYPE_END)
-		++args;
-	end_arg = (struct test_arg_end *)args;
-
-	test_code = (unsigned long)(args + 1); /* Code starts after args */
-
-	test_case_is_thumb = end_arg->flags & ARG_FLAG_THUMB;
-	if (test_case_is_thumb)
-		test_code |= 1;
-
-	current_code_start = test_code;
-
-	current_branch_target = 0;
-	if (end_arg->branch_offset != end_arg->end_offset)
-		current_branch_target = test_code + end_arg->branch_offset;
-
-	test_code += end_arg->code_offset;
-	test_before_probe.kprobe.addr = (kprobe_opcode_t *)test_code;
-
-	test_code = next_instruction(test_code);
-	test_case_probe.kprobe.addr = (kprobe_opcode_t *)test_code;
-
-	if (test_case_is_thumb) {
-		u16 *p = (u16 *)(test_code & ~1);
-		current_instruction = __mem_to_opcode_thumb16(p[0]);
-		if (is_wide_instruction(current_instruction)) {
-			u16 instr2 = __mem_to_opcode_thumb16(p[1]);
-			current_instruction = __opcode_thumb32_compose(current_instruction, instr2);
-		}
-	} else {
-		current_instruction = __mem_to_opcode_arm(*(u32 *)test_code);
-	}
-
-	if (current_title[0] == '.')
-		verbose("%s\n", current_title);
-	else
-		verbose("%s\t@ %0*x\n", current_title,
-					test_case_is_thumb ? 4 : 8,
-					current_instruction);
-
-	test_code = next_instruction(test_code);
-	test_after_probe.kprobe.addr = (kprobe_opcode_t *)test_code;
-
-	if (kprobe_test_flags & TEST_FLAG_NARROW_INSTR) {
-		if (!test_case_is_thumb ||
-			is_wide_instruction(current_instruction)) {
-				test_case_failed("expected 16-bit instruction");
-				goto fail;
-		}
-	} else {
-		if (test_case_is_thumb &&
-			!is_wide_instruction(current_instruction)) {
-				test_case_failed("expected 32-bit instruction");
-				goto fail;
-		}
-	}
-
-	coverage_add(current_instruction);
-
-	if (end_arg->flags & ARG_FLAG_UNSUPPORTED) {
-		if (register_test_probe(&test_case_probe) < 0)
-			goto pass;
-		test_case_failed("registered probe for unsupported instruction");
-		goto fail;
-	}
-
-	if (end_arg->flags & ARG_FLAG_SUPPORTED) {
-		if (register_test_probe(&test_case_probe) >= 0)
-			goto pass;
-		test_case_failed("couldn't register probe for supported instruction");
-		goto fail;
-	}
-
-	if (register_test_probe(&test_before_probe) < 0) {
-		test_case_failed("register test_before_probe failed");
-		goto fail;
-	}
-	if (register_test_probe(&test_after_probe) < 0) {
-		test_case_failed("register test_after_probe failed");
-		goto fail;
-	}
-	if (current_branch_target) {
-		test_after2_probe.kprobe.addr =
-				(kprobe_opcode_t *)current_branch_target;
-		if (register_test_probe(&test_after2_probe) < 0) {
-			test_case_failed("register test_after2_probe failed");
-			goto fail;
-		}
-	}
-
-	/* Start first run of test case */
-	test_case_run_count = 0;
-	++test_instance;
-	return current_code_start;
-pass:
-	test_case_run_count = TEST_CASE_PASSED;
-	return (uintptr_t)test_after_probe.kprobe.addr;
-fail:
-	test_case_run_count = TEST_CASE_FAILED;
-	return (uintptr_t)test_after_probe.kprobe.addr;
-}
-
-static bool check_test_results(void)
-{
-	size_t mem_size = 0;
-	u32 *mem = 0;
-
-	if (memcmp(&expected_regs, &result_regs, sizeof(expected_regs))) {
-		test_case_failed("registers differ");
-		goto fail;
-	}
-
-	if (memory_needs_checking) {
-		mem = (u32 *)result_regs.ARM_sp;
-		mem_size = expected_memory_size(mem);
-		if (memcmp(expected_memory, mem, mem_size)) {
-			test_case_failed("test memory differs");
-			goto fail;
-		}
-	}
-
-	return true;
-
-fail:
-	pr_err("initial_regs:\n");
-	print_registers(&initial_regs);
-	pr_err("expected_regs:\n");
-	print_registers(&expected_regs);
-	pr_err("result_regs:\n");
-	print_registers(&result_regs);
-
-	if (mem) {
-		pr_err("current_stack=%p\n", current_stack);
-		pr_err("expected_memory:\n");
-		print_memory(expected_memory, mem_size);
-		pr_err("result_memory:\n");
-		print_memory(mem, mem_size);
-	}
-
-	return false;
-}
-
-static uintptr_t __used kprobes_test_case_end(void)
-{
-	if (test_case_run_count < 0) {
-		if (test_case_run_count == TEST_CASE_PASSED)
-			/* kprobes_test_case_start did all the needed testing */
-			goto pass;
-		else
-			/* kprobes_test_case_start failed */
-			goto fail;
-	}
-
-	if (test_before_probe.hit != test_instance) {
-		test_case_failed("test_before_handler not run");
-		goto fail;
-	}
-
-	if (test_after_probe.hit != test_instance &&
-				test_after2_probe.hit != test_instance) {
-		test_case_failed("test_after_handler not run");
-		goto fail;
-	}
-
-	/*
-	 * Even numbered test runs ran without a probe on the test case so
-	 * we can gather reference results. The subsequent odd numbered run
-	 * will have the probe inserted.
-	*/
-	if ((test_case_run_count & 1) == 0) {
-		/* Save results from run without probe */
-		u32 *mem = (u32 *)result_regs.ARM_sp;
-		expected_regs = result_regs;
-		memcpy(expected_memory, mem, expected_memory_size(mem));
-
-		/* Insert probe onto test case instruction */
-		if (register_test_probe(&test_case_probe) < 0) {
-			test_case_failed("register test_case_probe failed");
-			goto fail;
-		}
-	} else {
-		/* Check probe ran as expected */
-		if (probe_should_run == 1) {
-			if (test_case_probe.hit != test_instance) {
-				test_case_failed("test_case_handler not run");
-				goto fail;
-			}
-		} else if (probe_should_run == 0) {
-			if (test_case_probe.hit == test_instance) {
-				test_case_failed("test_case_handler ran");
-				goto fail;
-			}
-		}
-
-		/* Remove probe for any subsequent reference run */
-		unregister_test_probe(&test_case_probe);
-
-		if (!check_test_results())
-			goto fail;
-
-		if (is_last_scenario)
-			goto pass;
-	}
-
-	/* Do next test run */
-	++test_case_run_count;
-	++test_instance;
-	return current_code_start;
-fail:
-	++test_fail_count;
-	goto end;
-pass:
-	++test_pass_count;
-end:
-	test_case_cleanup();
-	return 0;
-}
-
-
-/*
- * Top level test functions
- */
-
-static int run_test_cases(void (*tests)(void), const union decode_item *table)
-{
-	int ret;
-
-	pr_info("    Check decoding tables\n");
-	ret = table_test(table);
-	if (ret)
-		return ret;
-
-	pr_info("    Run test cases\n");
-	ret = coverage_start(table);
-	if (ret)
-		return ret;
-
-	tests();
-
-	coverage_end();
-	return 0;
-}
-
-
-static int __init run_all_tests(void)
-{
-	int ret = 0;
-
-	pr_info("Beginning kprobe tests...\n");
-
-#ifndef CONFIG_THUMB2_KERNEL
-
-	pr_info("Probe ARM code\n");
-	ret = run_api_tests(arm_func);
-	if (ret)
-		goto out;
-
-	pr_info("ARM instruction simulation\n");
-	ret = run_test_cases(kprobe_arm_test_cases, probes_decode_arm_table);
-	if (ret)
-		goto out;
-
-#else /* CONFIG_THUMB2_KERNEL */
-
-	pr_info("Probe 16-bit Thumb code\n");
-	ret = run_api_tests(thumb16_func);
-	if (ret)
-		goto out;
-
-	pr_info("Probe 32-bit Thumb code, even halfword\n");
-	ret = run_api_tests(thumb32even_func);
-	if (ret)
-		goto out;
-
-	pr_info("Probe 32-bit Thumb code, odd halfword\n");
-	ret = run_api_tests(thumb32odd_func);
-	if (ret)
-		goto out;
-
-	pr_info("16-bit Thumb instruction simulation\n");
-	ret = run_test_cases(kprobe_thumb16_test_cases,
-				probes_decode_thumb16_table);
-	if (ret)
-		goto out;
-
-	pr_info("32-bit Thumb instruction simulation\n");
-	ret = run_test_cases(kprobe_thumb32_test_cases,
-				probes_decode_thumb32_table);
-	if (ret)
-		goto out;
-#endif
-
-	pr_info("Total instruction simulation tests=%d, pass=%d fail=%d\n",
-		test_try_count, test_pass_count, test_fail_count);
-	if (test_fail_count) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-#if BENCHMARKING
-	pr_info("Benchmarks\n");
-	ret = run_benchmarks();
-	if (ret)
-		goto out;
-#endif
-
-#if __LINUX_ARM_ARCH__ >= 7
-	/* We are able to run all test cases so coverage should be complete */
-	if (coverage_fail) {
-		pr_err("FAIL: Test coverage checks failed\n");
-		ret = -EINVAL;
-		goto out;
-	}
-#endif
-
-out:
-	if (ret == 0)
-		ret = tests_failed;
-	if (ret == 0)
-		pr_info("Finished kprobe tests OK\n");
-	else
-		pr_err("kprobe tests failed\n");
-
-	return ret;
-}
-
-
-/*
- * Module setup
- */
-
-#ifdef MODULE
-
-static void __exit kprobe_test_exit(void)
-{
-}
-
-module_init(run_all_tests)
-module_exit(kprobe_test_exit)
-MODULE_LICENSE("GPL");
-
-#else /* !MODULE */
-
-late_initcall(run_all_tests);
-
-#endif