#ifndef _ASM_KPROBES_H #define _ASM_KPROBES_H /* * Kernel Probes (KProbes) * include/asm-i386/kprobes.h * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Copyright (C) IBM Corporation, 2002, 2004 * * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel * Probes initial implementation ( includes suggestions from * Rusty Russell). */ #include <linux/types.h> #include <linux/ptrace.h> #define __ARCH_WANT_KPROBES_INSN_SLOT struct kprobe; struct pt_regs; typedef u8 kprobe_opcode_t; #define BREAKPOINT_INSTRUCTION 0xcc #define RELATIVEJUMP_INSTRUCTION 0xe9 #define MAX_INSN_SIZE 16 #define MAX_STACK_SIZE 64 #define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ ? (MAX_STACK_SIZE) \ : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) #define ARCH_SUPPORTS_KRETPROBES #define flush_insn_slot(p) do { } while (0) extern const int kretprobe_blacklist_size; void arch_remove_kprobe(struct kprobe *p); void kretprobe_trampoline(void); /* Architecture specific copy of original instruction*/ struct arch_specific_insn { /* copy of the original instruction */ kprobe_opcode_t *insn; /* * If this flag is not 0, this kprobe can be boost when its * post_handler and break_handler is not set. */ int boostable; }; struct prev_kprobe { struct kprobe *kp; unsigned long status; unsigned long old_eflags; unsigned long saved_eflags; }; /* per-cpu kprobe control block */ struct kprobe_ctlblk { unsigned long kprobe_status; unsigned long kprobe_old_eflags; unsigned long kprobe_saved_eflags; long *jprobe_saved_esp; struct pt_regs jprobe_saved_regs; kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; struct prev_kprobe prev_kprobe; }; /* trap3/1 are intr gates for kprobes. So, restore the status of IF, * if necessary, before executing the original int3/1 (trap) handler. */ static inline void restore_interrupts(struct pt_regs *regs) { if (regs->eflags & IF_MASK) local_irq_enable(); } extern int kprobe_exceptions_notify(struct notifier_block *self, unsigned long val, void *data); extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); #endif /* _ASM_KPROBES_H */