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 (3148B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2#ifndef _ASM_KPROBES_H
      3#define _ASM_KPROBES_H
      4/*
      5 *  Kernel Probes (KProbes)
      6 *
      7 * Copyright (C) IBM Corporation, 2002, 2004
      8 * Copyright (C) Intel Corporation, 2005
      9 *
     10 * 2005-Apr     Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
     11 *              <anil.s.keshavamurthy@intel.com> adapted from i386
     12 */
     13#include <asm-generic/kprobes.h>
     14#include <asm/break.h>
     15
     16#define BREAK_INST	(long)(__IA64_BREAK_KPROBE << 6)
     17
     18#ifdef CONFIG_KPROBES
     19
     20#include <linux/types.h>
     21#include <linux/ptrace.h>
     22#include <linux/percpu.h>
     23
     24#define __ARCH_WANT_KPROBES_INSN_SLOT
     25#define MAX_INSN_SIZE   2	/* last half is for kprobe-booster */
     26#define NOP_M_INST	(long)(1<<27)
     27#define BRL_INST(i1, i2) ((long)((0xcL << 37) |	/* brl */ \
     28				(0x1L << 12) |	/* many */ \
     29				(((i1) & 1) << 36) | ((i2) << 13))) /* imm */
     30
     31typedef union cmp_inst {
     32	struct {
     33	unsigned long long qp : 6;
     34	unsigned long long p1 : 6;
     35	unsigned long long c  : 1;
     36	unsigned long long r2 : 7;
     37	unsigned long long r3 : 7;
     38	unsigned long long p2 : 6;
     39	unsigned long long ta : 1;
     40	unsigned long long x2 : 2;
     41	unsigned long long tb : 1;
     42	unsigned long long opcode : 4;
     43	unsigned long long reserved : 23;
     44	}f;
     45	unsigned long long l;
     46} cmp_inst_t;
     47
     48struct kprobe;
     49
     50typedef struct _bundle {
     51	struct {
     52		unsigned long long template : 5;
     53		unsigned long long slot0 : 41;
     54		unsigned long long slot1_p0 : 64-46;
     55	} quad0;
     56	struct {
     57		unsigned long long slot1_p1 : 41 - (64-46);
     58		unsigned long long slot2 : 41;
     59	} quad1;
     60} __attribute__((__aligned__(16)))  bundle_t;
     61
     62struct prev_kprobe {
     63	struct kprobe *kp;
     64	unsigned long status;
     65};
     66
     67#define	MAX_PARAM_RSE_SIZE	(0x60+0x60/0x3f)
     68/* per-cpu kprobe control block */
     69#define ARCH_PREV_KPROBE_SZ 2
     70struct kprobe_ctlblk {
     71	unsigned long kprobe_status;
     72	unsigned long *bsp;
     73	unsigned long cfm;
     74	atomic_t prev_kprobe_index;
     75	struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
     76};
     77
     78#define kretprobe_blacklist_size 0
     79
     80#define SLOT0_OPCODE_SHIFT	(37)
     81#define SLOT1_p1_OPCODE_SHIFT	(37 - (64-46))
     82#define SLOT2_OPCODE_SHIFT 	(37)
     83
     84#define INDIRECT_CALL_OPCODE		(1)
     85#define IP_RELATIVE_CALL_OPCODE		(5)
     86#define IP_RELATIVE_BRANCH_OPCODE	(4)
     87#define IP_RELATIVE_PREDICT_OPCODE	(7)
     88#define LONG_BRANCH_OPCODE		(0xC)
     89#define LONG_CALL_OPCODE		(0xD)
     90#define flush_insn_slot(p)		do { } while (0)
     91
     92typedef struct kprobe_opcode {
     93	bundle_t bundle;
     94} kprobe_opcode_t;
     95
     96/* Architecture specific copy of original instruction*/
     97struct arch_specific_insn {
     98	/* copy of the instruction to be emulated */
     99	kprobe_opcode_t *insn;
    100 #define INST_FLAG_FIX_RELATIVE_IP_ADDR		1
    101 #define INST_FLAG_FIX_BRANCH_REG		2
    102 #define INST_FLAG_BREAK_INST			4
    103 #define INST_FLAG_BOOSTABLE			8
    104 	unsigned long inst_flag;
    105 	unsigned short target_br_reg;
    106	unsigned short slot;
    107};
    108
    109extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
    110extern int kprobe_exceptions_notify(struct notifier_block *self,
    111				    unsigned long val, void *data);
    112
    113extern void invalidate_stacked_regs(void);
    114extern void flush_register_stack(void);
    115extern void arch_remove_kprobe(struct kprobe *p);
    116
    117#endif /* CONFIG_KPROBES */
    118#endif /* _ASM_KPROBES_H */