073090cb70
When a kprobe is placed onto conditionally executed ARM instructions, many of the emulation routines used to single step them produce corrupt register results. Rather than fix all of these cases we modify the framework which calls them to test the relevant condition flags and, if the test fails, skip calling the emulation code. Signed-off-by: Jon Medhurst <tixy@yxit.co.uk> Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
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* arch/arm/include/asm/kprobes.h
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*
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* Copyright (C) 2006, 2007 Motorola Inc.
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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_KPROBES_H
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#define _ARM_KPROBES_H
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#include <linux/types.h>
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#include <linux/ptrace.h>
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#include <linux/percpu.h>
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#define __ARCH_WANT_KPROBES_INSN_SLOT
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#define MAX_INSN_SIZE 2
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#define MAX_STACK_SIZE 64 /* 32 would probably be OK */
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/*
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* This undefined instruction must be unique and
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* reserved solely for kprobes' use.
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*/
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#define KPROBE_BREAKPOINT_INSTRUCTION 0xe7f001f8
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#define regs_return_value(regs) ((regs)->ARM_r0)
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#define flush_insn_slot(p) do { } while (0)
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#define kretprobe_blacklist_size 0
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typedef u32 kprobe_opcode_t;
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struct kprobe;
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typedef void (kprobe_insn_handler_t)(struct kprobe *, struct pt_regs *);
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typedef unsigned long (kprobe_check_cc)(unsigned long);
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/* Architecture specific copy of original instruction. */
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struct arch_specific_insn {
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kprobe_opcode_t *insn;
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kprobe_insn_handler_t *insn_handler;
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kprobe_check_cc *insn_check_cc;
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};
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struct prev_kprobe {
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struct kprobe *kp;
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unsigned int status;
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};
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/* per-cpu kprobe control block */
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struct kprobe_ctlblk {
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unsigned int kprobe_status;
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struct prev_kprobe prev_kprobe;
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struct pt_regs jprobe_saved_regs;
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char jprobes_stack[MAX_STACK_SIZE];
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};
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void arch_remove_kprobe(struct kprobe *);
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void kretprobe_trampoline(void);
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int kprobe_fault_handler(struct pt_regs *regs, unsigned int fsr);
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int kprobe_exceptions_notify(struct notifier_block *self,
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unsigned long val, void *data);
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enum kprobe_insn {
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INSN_REJECTED,
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INSN_GOOD,
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INSN_GOOD_NO_SLOT
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};
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enum kprobe_insn arm_kprobe_decode_insn(kprobe_opcode_t,
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struct arch_specific_insn *);
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void __init arm_kprobe_decode_init(void);
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#endif /* _ARM_KPROBES_H */
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