c2249707ee
decode-insn code has to be reused by arm64 uprobe implementation as well. Therefore, this patch protects some portion of kprobe code and renames few other, so that decode-insn functionality can be reused by uprobe even when CONFIG_KPROBES is not defined. kprobe_opcode_t and struct arch_specific_insn are also defined by linux/kprobes.h, when CONFIG_KPROBES is not defined. So, protect these definitions in asm/probes.h. linux/kprobes.h already includes asm/kprobes.h. Therefore, remove inclusion of asm/kprobes.h from decode-insn.c. There are some definitions like kprobe_insn and kprobes_handler_t etc can be re-used by uprobe. So, it would be better to remove 'k' from their names. struct arch_specific_insn is specific to kprobe. Therefore, introduce a new struct arch_probe_insn which will be common for both kprobe and uprobe, so that decode-insn code can be shared. Modify kprobe code accordingly. Function arm_probe_decode_insn() will be needed by uprobe as well. So make it global. Signed-off-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/*
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* arch/arm64/kernel/probes/decode-insn.h
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*
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* Copyright (C) 2013 Linaro Limited.
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef _ARM_KERNEL_KPROBES_ARM64_H
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#define _ARM_KERNEL_KPROBES_ARM64_H
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/*
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* ARM strongly recommends a limit of 128 bytes between LoadExcl and
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* StoreExcl instructions in a single thread of execution. So keep the
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* max atomic context size as 32.
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*/
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#define MAX_ATOMIC_CONTEXT_SIZE (128 / sizeof(kprobe_opcode_t))
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enum probe_insn {
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INSN_REJECTED,
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INSN_GOOD_NO_SLOT,
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INSN_GOOD,
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};
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#ifdef CONFIG_KPROBES
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enum probe_insn __kprobes
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arm_kprobe_decode_insn(kprobe_opcode_t *addr, struct arch_specific_insn *asi);
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#endif
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enum probe_insn __kprobes
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arm_probe_decode_insn(probe_opcode_t insn, struct arch_probe_insn *asi);
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#endif /* _ARM_KERNEL_KPROBES_ARM64_H */
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