1#ifndef _ASM_KPROBES_H 2#define _ASM_KPROBES_H 3/* 4 * Kernel Probes (KProbes) 5 * include/asm-ia64/kprobes.h 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 * 21 * Copyright (C) IBM Corporation, 2002, 2004 22 * Copyright (C) Intel Corporation, 2005 23 * 24 * 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy 25 * <anil.s.keshavamurthy@intel.com> adapted from i386 26 */ 27#include <linux/types.h> 28#include <linux/ptrace.h> 29#include <linux/percpu.h> 30#include <asm/break.h> 31 32#define __ARCH_WANT_KPROBES_INSN_SLOT 33#define MAX_INSN_SIZE 1 34#define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6) 35 36typedef union cmp_inst { 37 struct { 38 unsigned long long qp : 6; 39 unsigned long long p1 : 6; 40 unsigned long long c : 1; 41 unsigned long long r2 : 7; 42 unsigned long long r3 : 7; 43 unsigned long long p2 : 6; 44 unsigned long long ta : 1; 45 unsigned long long x2 : 2; 46 unsigned long long tb : 1; 47 unsigned long long opcode : 4; 48 unsigned long long reserved : 23; 49 }f; 50 unsigned long long l; 51} cmp_inst_t; 52 53struct kprobe; 54 55typedef struct _bundle { 56 struct { 57 unsigned long long template : 5; 58 unsigned long long slot0 : 41; 59 unsigned long long slot1_p0 : 64-46; 60 } quad0; 61 struct { 62 unsigned long long slot1_p1 : 41 - (64-46); 63 unsigned long long slot2 : 41; 64 } quad1; 65} __attribute__((__aligned__(16))) bundle_t; 66 67struct prev_kprobe { 68 struct kprobe *kp; 69 unsigned long status; 70}; 71 72#define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f) 73/* per-cpu kprobe control block */ 74#define ARCH_PREV_KPROBE_SZ 2 75struct kprobe_ctlblk { 76 unsigned long kprobe_status; 77 struct pt_regs jprobe_saved_regs; 78 unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE]; 79 unsigned long *bsp; 80 unsigned long cfm; 81 atomic_t prev_kprobe_index; 82 struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ]; 83}; 84 85#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry 86 87#define ARCH_SUPPORTS_KRETPROBES 88#define ARCH_INACTIVE_KPROBE_COUNT 1 89 90#define SLOT0_OPCODE_SHIFT (37) 91#define SLOT1_p1_OPCODE_SHIFT (37 - (64-46)) 92#define SLOT2_OPCODE_SHIFT (37) 93 94#define INDIRECT_CALL_OPCODE (1) 95#define IP_RELATIVE_CALL_OPCODE (5) 96#define IP_RELATIVE_BRANCH_OPCODE (4) 97#define IP_RELATIVE_PREDICT_OPCODE (7) 98#define LONG_BRANCH_OPCODE (0xC) 99#define LONG_CALL_OPCODE (0xD) 100#define flush_insn_slot(p) do { } while (0) 101 102typedef struct kprobe_opcode { 103 bundle_t bundle; 104} kprobe_opcode_t; 105 106struct fnptr { 107 unsigned long ip; 108 unsigned long gp; 109}; 110 111/* Architecture specific copy of original instruction*/ 112struct arch_specific_insn { 113 /* copy of the instruction to be emulated */ 114 kprobe_opcode_t *insn; 115 #define INST_FLAG_FIX_RELATIVE_IP_ADDR 1 116 #define INST_FLAG_FIX_BRANCH_REG 2 117 #define INST_FLAG_BREAK_INST 4 118 unsigned long inst_flag; 119 unsigned short target_br_reg; 120 unsigned short slot; 121}; 122 123extern int kprobes_fault_handler(struct pt_regs *regs, int trapnr); 124extern int kprobe_exceptions_notify(struct notifier_block *self, 125 unsigned long val, void *data); 126 127/* ia64 does not need this */ 128static inline void jprobe_return(void) 129{ 130} 131extern void invalidate_stacked_regs(void); 132extern void flush_register_stack(void); 133extern void arch_remove_kprobe(struct kprobe *p); 134 135#endif /* _ASM_KPROBES_H */ 136