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9edddaa200
Add CONFIG_HAVE_KRETPROBES to the arch/<arch>/Kconfig file for relevant architectures with kprobes support. This facilitates easy handling of in-kernel modules (like samples/kprobes/kretprobe_example.c) that depend on kretprobes being present in the kernel. Thanks to Sam Ravnborg for helping make the patch more lean. Per Mathieu's suggestion, added CONFIG_KRETPROBES and fixed up dependencies. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/*
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* include/asm-arm/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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/* 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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};
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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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int kprobe_trap_handler(struct pt_regs *regs, unsigned int instr);
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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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