cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

uprobes.h (6143B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2#ifndef _LINUX_UPROBES_H
      3#define _LINUX_UPROBES_H
      4/*
      5 * User-space Probes (UProbes)
      6 *
      7 * Copyright (C) IBM Corporation, 2008-2012
      8 * Authors:
      9 *	Srikar Dronamraju
     10 *	Jim Keniston
     11 * Copyright (C) 2011-2012 Red Hat, Inc., Peter Zijlstra
     12 */
     13
     14#include <linux/errno.h>
     15#include <linux/rbtree.h>
     16#include <linux/types.h>
     17#include <linux/wait.h>
     18
     19struct vm_area_struct;
     20struct mm_struct;
     21struct inode;
     22struct notifier_block;
     23struct page;
     24
     25#define UPROBE_HANDLER_REMOVE		1
     26#define UPROBE_HANDLER_MASK		1
     27
     28#define MAX_URETPROBE_DEPTH		64
     29
     30enum uprobe_filter_ctx {
     31	UPROBE_FILTER_REGISTER,
     32	UPROBE_FILTER_UNREGISTER,
     33	UPROBE_FILTER_MMAP,
     34};
     35
     36struct uprobe_consumer {
     37	int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs);
     38	int (*ret_handler)(struct uprobe_consumer *self,
     39				unsigned long func,
     40				struct pt_regs *regs);
     41	bool (*filter)(struct uprobe_consumer *self,
     42				enum uprobe_filter_ctx ctx,
     43				struct mm_struct *mm);
     44
     45	struct uprobe_consumer *next;
     46};
     47
     48#ifdef CONFIG_UPROBES
     49#include <asm/uprobes.h>
     50
     51enum uprobe_task_state {
     52	UTASK_RUNNING,
     53	UTASK_SSTEP,
     54	UTASK_SSTEP_ACK,
     55	UTASK_SSTEP_TRAPPED,
     56};
     57
     58/*
     59 * uprobe_task: Metadata of a task while it singlesteps.
     60 */
     61struct uprobe_task {
     62	enum uprobe_task_state		state;
     63
     64	union {
     65		struct {
     66			struct arch_uprobe_task	autask;
     67			unsigned long		vaddr;
     68		};
     69
     70		struct {
     71			struct callback_head	dup_xol_work;
     72			unsigned long		dup_xol_addr;
     73		};
     74	};
     75
     76	struct uprobe			*active_uprobe;
     77	unsigned long			xol_vaddr;
     78
     79	struct return_instance		*return_instances;
     80	unsigned int			depth;
     81};
     82
     83struct return_instance {
     84	struct uprobe		*uprobe;
     85	unsigned long		func;
     86	unsigned long		stack;		/* stack pointer */
     87	unsigned long		orig_ret_vaddr; /* original return address */
     88	bool			chained;	/* true, if instance is nested */
     89
     90	struct return_instance	*next;		/* keep as stack */
     91};
     92
     93enum rp_check {
     94	RP_CHECK_CALL,
     95	RP_CHECK_CHAIN_CALL,
     96	RP_CHECK_RET,
     97};
     98
     99struct xol_area;
    100
    101struct uprobes_state {
    102	struct xol_area		*xol_area;
    103};
    104
    105extern void __init uprobes_init(void);
    106extern int set_swbp(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
    107extern int set_orig_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long vaddr);
    108extern bool is_swbp_insn(uprobe_opcode_t *insn);
    109extern bool is_trap_insn(uprobe_opcode_t *insn);
    110extern unsigned long uprobe_get_swbp_addr(struct pt_regs *regs);
    111extern unsigned long uprobe_get_trap_addr(struct pt_regs *regs);
    112extern int uprobe_write_opcode(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_t);
    113extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
    114extern int uprobe_register_refctr(struct inode *inode, loff_t offset, loff_t ref_ctr_offset, struct uprobe_consumer *uc);
    115extern int uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool);
    116extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc);
    117extern int uprobe_mmap(struct vm_area_struct *vma);
    118extern void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end);
    119extern void uprobe_start_dup_mmap(void);
    120extern void uprobe_end_dup_mmap(void);
    121extern void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm);
    122extern void uprobe_free_utask(struct task_struct *t);
    123extern void uprobe_copy_process(struct task_struct *t, unsigned long flags);
    124extern int uprobe_post_sstep_notifier(struct pt_regs *regs);
    125extern int uprobe_pre_sstep_notifier(struct pt_regs *regs);
    126extern void uprobe_notify_resume(struct pt_regs *regs);
    127extern bool uprobe_deny_signal(void);
    128extern bool arch_uprobe_skip_sstep(struct arch_uprobe *aup, struct pt_regs *regs);
    129extern void uprobe_clear_state(struct mm_struct *mm);
    130extern int  arch_uprobe_analyze_insn(struct arch_uprobe *aup, struct mm_struct *mm, unsigned long addr);
    131extern int  arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
    132extern int  arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
    133extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
    134extern int  arch_uprobe_exception_notify(struct notifier_block *self, unsigned long val, void *data);
    135extern void arch_uprobe_abort_xol(struct arch_uprobe *aup, struct pt_regs *regs);
    136extern unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline_vaddr, struct pt_regs *regs);
    137extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, struct pt_regs *regs);
    138extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs);
    139extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
    140					 void *src, unsigned long len);
    141#else /* !CONFIG_UPROBES */
    142struct uprobes_state {
    143};
    144
    145static inline void uprobes_init(void)
    146{
    147}
    148
    149#define uprobe_get_trap_addr(regs)	instruction_pointer(regs)
    150
    151static inline int
    152uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
    153{
    154	return -ENOSYS;
    155}
    156static inline int uprobe_register_refctr(struct inode *inode, loff_t offset, loff_t ref_ctr_offset, struct uprobe_consumer *uc)
    157{
    158	return -ENOSYS;
    159}
    160static inline int
    161uprobe_apply(struct inode *inode, loff_t offset, struct uprobe_consumer *uc, bool add)
    162{
    163	return -ENOSYS;
    164}
    165static inline void
    166uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *uc)
    167{
    168}
    169static inline int uprobe_mmap(struct vm_area_struct *vma)
    170{
    171	return 0;
    172}
    173static inline void
    174uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned long end)
    175{
    176}
    177static inline void uprobe_start_dup_mmap(void)
    178{
    179}
    180static inline void uprobe_end_dup_mmap(void)
    181{
    182}
    183static inline void
    184uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
    185{
    186}
    187static inline void uprobe_notify_resume(struct pt_regs *regs)
    188{
    189}
    190static inline bool uprobe_deny_signal(void)
    191{
    192	return false;
    193}
    194static inline void uprobe_free_utask(struct task_struct *t)
    195{
    196}
    197static inline void uprobe_copy_process(struct task_struct *t, unsigned long flags)
    198{
    199}
    200static inline void uprobe_clear_state(struct mm_struct *mm)
    201{
    202}
    203#endif /* !CONFIG_UPROBES */
    204#endif	/* _LINUX_UPROBES_H */