cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kprobes.h (2228B)

      1/* SPDX-License-Identifier: GPL-2.0+ */
      2#ifndef _ASM_S390_KPROBES_H
      3#define _ASM_S390_KPROBES_H
      4/*
      5 *  Kernel Probes (KProbes)
      6 *
      7 * Copyright IBM Corp. 2002, 2006
      8 *
      9 * 2002-Oct	Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
     10 *		Probes initial implementation ( includes suggestions from
     11 *		Rusty Russell).
     12 * 2004-Nov	Modified for PPC64 by Ananth N Mavinakayanahalli
     13 *		<ananth@in.ibm.com>
     14 * 2005-Dec	Used as a template for s390 by Mike Grundy
     15 *		<grundym@us.ibm.com>
     16 */
     17#include <linux/types.h>
     18#include <asm-generic/kprobes.h>
     19
     20#define BREAKPOINT_INSTRUCTION	0x0002
     21
     22#define FIXUP_PSW_NORMAL	0x08
     23#define FIXUP_BRANCH_NOT_TAKEN	0x04
     24#define FIXUP_RETURN_REGISTER	0x02
     25#define FIXUP_NOT_REQUIRED	0x01
     26
     27int probe_is_prohibited_opcode(u16 *insn);
     28int probe_get_fixup_type(u16 *insn);
     29int probe_is_insn_relative_long(u16 *insn);
     30
     31#ifdef CONFIG_KPROBES
     32#include <linux/ptrace.h>
     33#include <linux/percpu.h>
     34#include <linux/sched/task_stack.h>
     35
     36#define __ARCH_WANT_KPROBES_INSN_SLOT
     37
     38struct pt_regs;
     39struct kprobe;
     40
     41typedef u16 kprobe_opcode_t;
     42
     43/* Maximum instruction size is 3 (16bit) halfwords: */
     44#define MAX_INSN_SIZE		0x0003
     45#define MAX_STACK_SIZE		64
     46#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
     47	(((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR))) \
     48	? (MAX_STACK_SIZE) \
     49	: (((unsigned long)task_stack_page(current)) + THREAD_SIZE - (ADDR)))
     50
     51#define kretprobe_blacklist_size 0
     52
     53/* Architecture specific copy of original instruction */
     54struct arch_specific_insn {
     55	/* copy of original instruction */
     56	kprobe_opcode_t *insn;
     57};
     58
     59struct prev_kprobe {
     60	struct kprobe *kp;
     61	unsigned long status;
     62};
     63
     64/* per-cpu kprobe control block */
     65struct kprobe_ctlblk {
     66	unsigned long kprobe_status;
     67	unsigned long kprobe_saved_imask;
     68	unsigned long kprobe_saved_ctl[3];
     69	struct prev_kprobe prev_kprobe;
     70};
     71
     72void arch_remove_kprobe(struct kprobe *p);
     73void __kretprobe_trampoline(void);
     74void trampoline_probe_handler(struct pt_regs *regs);
     75
     76int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
     77int kprobe_exceptions_notify(struct notifier_block *self,
     78	unsigned long val, void *data);
     79
     80#define flush_insn_slot(p)	do { } while (0)
     81
     82#endif /* CONFIG_KPROBES */
     83#endif	/* _ASM_S390_KPROBES_H */