| #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, 2008-2012 |
| * Authors: |
| * Srikar Dronamraju |
| * Jim Keniston |
| * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com> |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/rbtree.h> |
| #include <linux/types.h> |
| |
| struct vm_area_struct; |
| struct mm_struct; |
| struct inode; |
| struct notifier_block; |
| struct page; |
| |
| #define UPROBE_HANDLER_REMOVE 1 |
| #define UPROBE_HANDLER_MASK 1 |
| |
| #define MAX_URETPROBE_DEPTH 64 |
| |
| enum uprobe_filter_ctx { |
| UPROBE_FILTER_REGISTER, |
| UPROBE_FILTER_UNREGISTER, |
| UPROBE_FILTER_MMAP, |
| }; |
| |
| struct uprobe_consumer { |
| int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs); |
| int (*ret_handler)(struct uprobe_consumer *self, |
| unsigned long func, |
| struct pt_regs *regs); |
| bool (*filter)(struct uprobe_consumer *self, |
| enum uprobe_filter_ctx ctx, |
| struct mm_struct *mm); |
| |
| struct uprobe_consumer *next; |
| }; |
| |
| #ifdef CONFIG_UPROBES |
| #include <asm/uprobes.h> |
| |
| enum uprobe_task_state { |
| UTASK_RUNNING, |
| UTASK_SSTEP, |
| UTASK_SSTEP_ACK, |
| UTASK_SSTEP_TRAPPED, |
| }; |
| |
| /* |
| * uprobe_task: Metadata of a task while it singlesteps. |
| */ |
| struct uprobe_task { |
| enum uprobe_task_state state; |
| |
| union { |
| struct { |
| struct arch_uprobe_task autask; |
| unsigned long vaddr; |
| }; |
| |
| struct { |
| struct callback_head dup_xol_work; |
| unsigned long dup_xol_addr; |
| }; |
| }; |
| |
| struct uprobe *active_uprobe; |
| unsigned long xol_vaddr; |
| |
| struct return_instance *return_instances; |
| unsigned int depth; |
| }; |
| |
| struct xol_area; |
| |
| struct uprobes_state { |
| struct xol_area *xol_area; |
| }; |
| |
| extern int __weak set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr); |
| extern int __weak set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr); |
| extern bool __weak is_swbp_insn(uprobe_opcode_t *insn); |
| extern bool __weak is_trap_insn(uprobe_opcode_t *insn); |
| extern unsigned long __weak uprobe_get_swbp_addr(struct pt_regs *regs); |
| extern int uprobe_write_opcode(struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_t); |
| extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc); |
| extern int uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool); |
| extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc); |
| extern int uprobe_mmap(struct vm_area_struct *vma); |
| extern void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end); |
| extern void uprobe_start_dup_mmap(void); |
| extern void uprobe_end_dup_mmap(void); |
| extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm); |
| extern void uprobe_free_utask(struct task_struct *t); |
| extern void uprobe_copy_process(struct task_struct *t, unsigned long flags); |
| extern int uprobe_post_sstep_notifier(struct pt_regs *regs); |
| extern int uprobe_pre_sstep_notifier(struct pt_regs *regs); |
| extern void uprobe_notify_resume(struct pt_regs *regs); |
| extern bool uprobe_deny_signal(void); |
| extern bool arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs); |
| extern void uprobe_clear_state(struct mm_struct *mm); |
| extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr); |
| extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs); |
| extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs); |
| extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk); |
| extern int arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data); |
| extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs); |
| extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs); |
| extern bool __weak arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs); |
| extern void __weak arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr, |
| void *src, unsigned long len); |
| #else /* !CONFIG_UPROBES */ |
| struct uprobes_state { |
| }; |
| static inline int |
| uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc) |
| { |
| return -ENOSYS; |
| } |
| static inline int |
| uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool add) |
| { |
| return -ENOSYS; |
| } |
| static inline void |
| uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc) |
| { |
| } |
| static inline int uprobe_mmap(struct vm_area_struct *vma) |
| { |
| return 0; |
| } |
| static inline void |
| uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end) |
| { |
| } |
| static inline void uprobe_start_dup_mmap(void) |
| { |
| } |
| static inline void uprobe_end_dup_mmap(void) |
| { |
| } |
| static inline void |
| uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm) |
| { |
| } |
| static inline void uprobe_notify_resume(struct pt_regs *regs) |
| { |
| } |
| static inline bool uprobe_deny_signal(void) |
| { |
| return false; |
| } |
| static inline void uprobe_free_utask(struct task_struct *t) |
| { |
| } |
| static inline void uprobe_copy_process(struct task_struct *t, unsigned long flags) |
| { |
| } |
| static inline void uprobe_clear_state(struct mm_struct *mm) |
| { |
| } |
| #endif /* !CONFIG_UPROBES */ |
| #endif /* _LINUX_UPROBES_H */ |