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#ifndef _LINUX_UPROBES_H
#define _LINUX_UPROBES_H
/*
* User-space Probes (UProbes)
*
* 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, 2008-2011
* Authors:
* Srikar Dronamraju
* Jim Keniston
*/
#include <linux/errno.h>
#include <linux/rbtree.h>
struct vm_area_struct;
#ifdef CONFIG_ARCH_SUPPORTS_UPROBES
#include <asm/uprobes.h>
#else
typedef u8 uprobe_opcode_t;
struct uprobe_arch_info {};
#define MAX_UINSN_BYTES 4
#endif
/* flags that denote/change uprobes behaviour */
/* Have a copy of original instruction */
#define UPROBES_COPY_INSN 0x1
/* Dont run handlers when first register/ last unregister in progress*/
#define UPROBES_RUN_HANDLER 0x2
struct uprobe_consumer {
int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
/*
* filter is optional; If a filter exists, handler is run
* if and only if filter returns true.
*/
bool (*filter)(struct uprobe_consumer *self, struct task_struct *task);
struct uprobe_consumer *next;
};
struct uprobe {
struct rb_node rb_node; /* node in the rb tree */
atomic_t ref;
struct rw_semaphore consumer_rwsem;
struct list_head pending_list;
struct uprobe_arch_info arch_info;
struct uprobe_consumer *consumers;
struct inode *inode; /* Also hold a ref to inode */
loff_t offset;
int flags;
u8 insn[MAX_UINSN_BYTES];
};
#ifdef CONFIG_UPROBES
extern int __weak set_bkpt(struct mm_struct *mm, struct uprobe *uprobe, unsigned long vaddr);
extern int __weak set_orig_insn(struct mm_struct *mm, struct uprobe *uprobe, unsigned long vaddr, bool verify);
extern bool __weak is_bkpt_insn(uprobe_opcode_t *insn);
extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer);
extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer);
extern int uprobe_mmap(struct vm_area_struct *vma);
#else /* CONFIG_UPROBES is not defined */
static inline int
uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer)
{
return -ENOSYS;
}
static inline void
uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer)
{
}
static inline int uprobe_mmap(struct vm_area_struct *vma)
{
return 0;
}
#endif /* CONFIG_UPROBES */
#endif /* _LINUX_UPROBES_H */
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