path: root/arch/arm/kernel/kprobes-test-thumb.c

/*
 * arch/arm/kernel/kprobes-test-thumb.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.
 */

#include <linux/kernel.h>
#include <linux/module.h>

#include "kprobes-test.h"


#define TEST_ISA "16"

#define DONT_TEST_IN_ITBLOCK(tests)			\
	kprobe_test_flags |= TEST_FLAG_NO_ITBLOCK;	\
	tests						\
	kprobe_test_flags &= ~TEST_FLAG_NO_ITBLOCK;

#define CONDITION_INSTRUCTIONS(cc_pos, tests)		\
	kprobe_test_cc_position = cc_pos;		\
	DONT_TEST_IN_ITBLOCK(tests)			\
	kprobe_test_cc_position = 0;

#define TEST_ITBLOCK(code)				\
	kprobe_test_flags |= TEST_FLAG_FULL_ITBLOCK;	\
	TESTCASE_START(code)				\
	TEST_ARG_END("")				\
	"50:	nop			\n\t"		\
	"1:	"code"			\n\t"		\
	"	mov r1, #0x11		\n\t"		\
	"	mov r2, #0x22		\n\t"		\
	"	mov r3, #0x33		\n\t"		\
	"2:	nop			\n\t"		\
	TESTCASE_END					\
	kprobe_test_flags &= ~TEST_FLAG_FULL_ITBLOCK;

#define TEST_THUMB_TO_ARM_INTERWORK_P(code1, reg, val, code2)	\
	TESTCASE_START(code1 #reg code2)			\
	TEST_ARG_PTR(reg, val)					\
	TEST_ARG_REG(14, 99f+1)					\
	TEST_ARG_MEM(15, 3f)					\
	TEST_ARG_END("")					\
	"	nop			\n\t" /* To align 1f */	\
	"50:	nop			\n\t"			\
	"1:	"code1 #reg code2"	\n\t"			\
	"	bx	lr		\n\t"			\
	".arm				\n\t"			\
	"3:	adr	lr, 2f+1	\n\t"			\
	"	bx	lr		\n\t"			\
	".thumb				\n\t"			\
	"2:	nop			\n\t"			\
	TESTCASE_END


void kprobe_thumb16_test_cases(void)
{
	kprobe_test_flags = TEST_FLAG_NARROW_INSTR;

	TEST_GROUP("Shift (immediate), add, subtract, move, and compare")

	TEST_R(    "lsls	r7, r",0,VAL1,", #5")
	TEST_R(    "lsls	r0, r",7,VAL2,", #11")
	TEST_R(    "lsrs	r7, r",0,VAL1,", #5")
	TEST_R(    "lsrs	r0, r",7,VAL2,", #11")
	TEST_R(    "asrs	r7, r",0,VAL1,", #5")
	TEST_R(    "asrs	r0, r",7,VAL2,", #11")
	TEST_RR(   "adds	r2, r",0,VAL1,", r",7,VAL2,"")
	TEST_RR(   "adds	r5, r",7,VAL2,", r",0,VAL2,"")
	TEST_RR(   "subs	r2, r",0,VAL1,", r",7,VAL2,"")
	TEST_RR(   "subs	r5, r",7,VAL2,", r",0,VAL2,"")
	TEST_R(    "adds	r7, r",0,VAL1,", #5")
	TEST_R(    "adds	r0, r",7,VAL2,", #2")
	TEST_R(    "subs	r7, r",0,VAL1,", #5")
	TEST_R(    "subs	r0, r",7,VAL2,", #2")
	TEST(      "movs.n	r0, #0x5f")
	TEST(      "movs.n	r7, #0xa0")
	TEST_R(    "cmp.n	r",0,0x5e, ", #0x5f")
	TEST_R(    "cmp.n	r",5,0x15f,", #0x5f")
	TEST_R(    "cmp.n	r",7,0xa0, ", #0xa0")
	TEST_R(    "adds.n	r",0,VAL1,", #0x5f")
	TEST_R(    "adds.n	r",7,VAL2,", #0xa0")
	TEST_R(    "subs.n	r",0,VAL1,", #0x5f")
	TEST_R(    "subs.n	r",7,VAL2,", #0xa0")

	TEST_GROUP("16-bit Thumb data-processing instructions")

#define DATA_PROCESSING16(op,val)			\
	TEST_RR(   op"	r",0,VAL1,", r",7,val,"")	\
	TEST_RR(   op"	r",7,VAL2,", r",0,val,"")

	DATA_PROCESSING16("ands",0xf00f00ff)
	DATA_PROCESSING16("eors",0xf00f00ff)
	DATA_PROCESSING16("lsls",11)
	DATA_PROCESSING16("lsrs",11)
	DATA_PROCESSING16("asrs",11)
	DATA_PROCESSING16("adcs",VAL2)
	DATA_PROCESSING16("sbcs",VAL2)
	DATA_PROCESSING16("rors",11)
	DATA_PROCESSING16("tst",0xf00f00ff)
	TEST_R("rsbs	r",0,VAL1,", #0")
	TEST_R("rsbs	r",7,VAL2,", #0")
	DATA_PROCESSING16("cmp",0xf00f00ff)
	DATA_PROCESSING16("cmn",0xf00f00ff)
	DATA_PROCESSING16("orrs",0xf00f00ff)
	DATA_PROCESSING16("muls",VAL2)
	DATA_PROCESSING16("bics",0xf00f00ff)
	DATA_PROCESSING16("mvns",VAL2)

	TEST_GROUP(