LXR linux/arch/ia64/include/asm/kprobes.h

   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 */
 119