1 #ifndef _ASM_KPROBES_H 2 #define _ASM_KPROBES_H 3 /* 4 * Kernel Probes (KProbes) 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 * 20 * Copyright (C) IBM Corporation, 2002, 2004 21 * Copyright (C) Intel Corporation, 2005 22 * 23 * 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy 24 * <anil.s.keshavamurthy@intel.com> adapted from i386 25 */ 26 #include <asm-generic/kprobes.h> 27 #include <asm/break.h> 28 29 #define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6) 30 31 #ifdef CONFIG_KPROBES 32 33 #include <linux/types.h> 34 #include <linux/ptrace.h> 35 #include <linux/percpu.h> 36 37 #define __ARCH_WANT_KPROBES_INSN_SLOT 38 #define MAX_INSN_SIZE 2 /* last half is for kprobe-booster */ 39 #define NOP_M_INST (long)(1<<27) 40 #define BRL_INST(i1, i2) ((long)((0xcL << 37) | /* brl */ \ 41 (0x1L << 12) | /* many */ \ 42 (((i1) & 1) << 36) | ((i2) << 13))) /* imm */ 43 44 typedef union cmp_inst { 45 struct { 46 unsigned long long qp : 6; 47 unsigned long long p1 : 6; 48 unsigned long long c : 1; 49 unsigned long long r2 : 7; 50 unsigned long long r3 : 7; 51 unsigned long long p2 : 6; 52 unsigned long long ta : 1; 53 unsigned long long x2 : 2; 54 unsigned long long tb : 1; 55 unsigned long long opcode : 4; 56 unsigned long long reserved : 23; 57 }f; 58 unsigned long long l; 59 } cmp_inst_t; 60 61 struct kprobe; 62 63 typedef struct _bundle { 64 struct { 65 unsigned long long template : 5; 66 unsigned long long slot0 : 41; 67 unsigned long long slot1_p0 : 64-46; 68 } quad0; 69 struct { 70 unsigned long long slot1_p1 : 41 - (64-46); 71 unsigned long long slot2 : 41; 72 } quad1; 73 } __attribute__((__aligned__(16))) bundle_t; 74 75 struct prev_kprobe { 76 struct kprobe *kp; 77 unsigned long status; 78 }; 79 80 #define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f) 81 /* per-cpu kprobe control block */ 82 #define ARCH_PREV_KPROBE_SZ 2 83 struct kprobe_ctlblk { 84 unsigned long kprobe_status; 85 struct pt_regs jprobe_saved_regs; 86 unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE]; 87 unsigned long *bsp; 88 unsigned long cfm; 89 atomic_t prev_kprobe_index; 90 struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ]; 91 }; 92 93 #define kretprobe_blacklist_size 0 94 95 #define SLOT0_OPCODE_SHIFT (37) 96 #define SLOT1_p1_OPCODE_SHIFT (37 - (64-46)) 97 #define SLOT2_OPCODE_SHIFT (37) 98 99 #define INDIRECT_CALL_OPCODE (1) 100 #define IP_RELATIVE_CALL_OPCODE (5) 101 #define IP_RELATIVE_BRANCH_OPCODE (4) 102 #define IP_RELATIVE_PREDICT_OPCODE (7) 103 #define LONG_BRANCH_OPCODE (0xC) 104 #define LONG_CALL_OPCODE (0xD) 105 #define flush_insn_slot(p) do { } while (0) 106 107 typedef struct kprobe_opcode { 108 bundle_t bundle; 109 } kprobe_opcode_t; 110 111 /* Architecture specific copy of original instruction*/ 112 struct 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 #define INST_FLAG_BOOSTABLE 8 119 unsigned long inst_flag; 120 unsigned short target_br_reg; 121 unsigned short slot; 122 }; 123 124 extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); 125 extern int kprobe_exceptions_notify(struct notifier_block *self, 126 unsigned long val, void *data); 127 128 extern void invalidate_stacked_regs(void); 129 extern void flush_register_stack(void); 130 extern void arch_remove_kprobe(struct kprobe *p); 131 132 #endif /* CONFIG_KPROBES */ 133 #endif /* _ASM_KPROBES_H */ 134