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+/*
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+ * arch/arm/kernel/kprobes-test.h
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+ *
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+ * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#define VERBOSE 0 /* Set to '1' for more logging of test cases */
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+
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+#ifdef CONFIG_THUMB2_KERNEL
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+#define NORMAL_ISA "16"
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+#else
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+#define NORMAL_ISA "32"
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+#endif
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+
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+
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+/* Flags used in kprobe_test_flags */
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+#define TEST_FLAG_NO_ITBLOCK (1<<0)
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+#define TEST_FLAG_FULL_ITBLOCK (1<<1)
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+#define TEST_FLAG_NARROW_INSTR (1<<2)
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+
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+extern int kprobe_test_flags;
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+extern int kprobe_test_cc_position;
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+
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+
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+#define TEST_MEMORY_SIZE 256
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+
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+
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+/*
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+ * Test case structures.
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+ *
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+ * The arguments given to test cases can be one of three types.
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+ *
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+ * ARG_TYPE_REG
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+ * Load a register with the given value.
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+ *
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+ * ARG_TYPE_PTR
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+ * Load a register with a pointer into the stack buffer (SP + given value).
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+ *
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+ * ARG_TYPE_MEM
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+ * Store the given value into the stack buffer at [SP+index].
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+ *
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+ */
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+
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+#define ARG_TYPE_END 0
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+#define ARG_TYPE_REG 1
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+#define ARG_TYPE_PTR 2
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+#define ARG_TYPE_MEM 3
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+
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+#define ARG_FLAG_UNSUPPORTED 0x01
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+#define ARG_FLAG_SUPPORTED 0x02
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+#define ARG_FLAG_THUMB 0x10 /* Must be 16 so TEST_ISA can be used */
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+#define ARG_FLAG_ARM 0x20 /* Must be 32 so TEST_ISA can be used */
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+
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+struct test_arg {
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+ u8 type; /* ARG_TYPE_x */
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+ u8 _padding[7];
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+};
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+
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+struct test_arg_regptr {
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+ u8 type; /* ARG_TYPE_REG or ARG_TYPE_PTR */
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+ u8 reg;
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+ u8 _padding[2];
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+ u32 val;
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+};
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+
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+struct test_arg_mem {
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+ u8 type; /* ARG_TYPE_MEM */
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+ u8 index;
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+ u8 _padding[2];
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+ u32 val;
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+};
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+
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+struct test_arg_end {
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+ u8 type; /* ARG_TYPE_END */
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+ u8 flags; /* ARG_FLAG_x */
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+ u16 code_offset;
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+ u16 branch_offset;
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+ u16 end_offset;
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+};
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+
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+
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+/*
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+ * Building blocks for test cases.
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+ *
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+ * Each test case is wrapped between TESTCASE_START and TESTCASE_END.
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+ *
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+ * To specify arguments for a test case the TEST_ARG_{REG,PTR,MEM} macros are
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+ * used followed by a terminating TEST_ARG_END.
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+ *
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+ * After this, the instruction to be tested is defined with TEST_INSTRUCTION.
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+ * Or for branches, TEST_BRANCH_B and TEST_BRANCH_F (branch forwards/backwards).
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+ *
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+ * Some specific test cases may make use of other custom constructs.
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+ */
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+
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+#if VERBOSE
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+#define verbose(fmt, ...) pr_info(fmt, ##__VA_ARGS__)
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+#else
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+#define verbose(fmt, ...)
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+#endif
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+
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+#define TEST_GROUP(title) \
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+ verbose("\n"); \
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+ verbose(title"\n"); \
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+ verbose("---------------------------------------------------------\n");
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+
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+#define TESTCASE_START(title) \
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+ __asm__ __volatile__ ( \
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+ "bl __kprobes_test_case_start \n\t" \
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+ /* don't use .asciz here as 'title' may be */ \
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+ /* multiple strings to be concatenated. */ \
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+ ".ascii "#title" \n\t" \
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+ ".byte 0 \n\t" \
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+ ".align 2 \n\t"
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+
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+#define TEST_ARG_REG(reg, val) \
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+ ".byte "__stringify(ARG_TYPE_REG)" \n\t" \
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+ ".byte "#reg" \n\t" \
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+ ".short 0 \n\t" \
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+ ".word "#val" \n\t"
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+
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+#define TEST_ARG_PTR(reg, val) \
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+ ".byte "__stringify(ARG_TYPE_PTR)" \n\t" \
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+ ".byte "#reg" \n\t" \
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+ ".short 0 \n\t" \
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+ ".word "#val" \n\t"
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+
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+#define TEST_ARG_MEM(index, val) \
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+ ".byte "__stringify(ARG_TYPE_MEM)" \n\t" \
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+ ".byte "#index" \n\t" \
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+ ".short 0 \n\t" \
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+ ".word "#val" \n\t"
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+
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+#define TEST_ARG_END(flags) \
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+ ".byte "__stringify(ARG_TYPE_END)" \n\t" \
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+ ".byte "TEST_ISA flags" \n\t" \
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+ ".short 50f-0f \n\t" \
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+ ".short 2f-0f \n\t" \
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+ ".short 99f-0f \n\t" \
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+ ".code "TEST_ISA" \n\t" \
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+ "0: \n\t"
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+
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+#define TEST_INSTRUCTION(instruction) \
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+ "50: nop \n\t" \
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+ "1: "instruction" \n\t" \
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+ " nop \n\t"
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+
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