| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| #ifndef _ASM_KPROBES_H |
| #define _ASM_KPROBES_H |
| /* |
| * Kernel Probes (KProbes) |
| * |
| * Copyright (C) IBM Corporation, 2002, 2004 |
| * Copyright (C) Intel Corporation, 2005 |
| * |
| * 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy |
| * <anil.s.keshavamurthy@intel.com> adapted from i386 |
| */ |
| #include <asm-generic/kprobes.h> |
| #include <asm/break.h> |
| |
| #define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6) |
| |
| #ifdef CONFIG_KPROBES |
| |
| #include <linux/types.h> |
| #include <linux/ptrace.h> |
| #include <linux/percpu.h> |
| |
| #define __ARCH_WANT_KPROBES_INSN_SLOT |
| #define MAX_INSN_SIZE 2 /* last half is for kprobe-booster */ |
| #define NOP_M_INST (long)(1<<27) |
| #define BRL_INST(i1, i2) ((long)((0xcL << 37) | /* brl */ \ |
| (0x1L << 12) | /* many */ \ |
| (((i1) & 1) << 36) | ((i2) << 13))) /* imm */ |
| |
| typedef union cmp_inst { |
| struct { |
| unsigned long long qp : 6; |
| unsigned long long p1 : 6; |
| unsigned long long c : 1; |
| unsigned long long r2 : 7; |
| unsigned long long r3 : 7; |
| unsigned long long p2 : 6; |
| unsigned long long ta : 1; |
| unsigned long long x2 : 2; |
| unsigned long long tb : 1; |
| unsigned long long opcode : 4; |
| unsigned long long reserved : 23; |
| }f; |
| unsigned long long l; |
| } cmp_inst_t; |
| |
| struct kprobe; |
| |
| typedef struct _bundle { |
| struct { |
| unsigned long long template : 5; |
| unsigned long long slot0 : 41; |
| unsigned long long slot1_p0 : 64-46; |
| } quad0; |
| struct { |
| unsigned long long slot1_p1 : 41 - (64-46); |
| unsigned long long slot2 : 41; |
| } quad1; |
| } __attribute__((__aligned__(16))) bundle_t; |
| |
| struct prev_kprobe { |
| struct kprobe *kp; |
| unsigned long status; |
| }; |
| |
| #define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f) |
| /* per-cpu kprobe control block */ |
| #define ARCH_PREV_KPROBE_SZ 2 |
| struct kprobe_ctlblk { |
| unsigned long kprobe_status; |
| unsigned long *bsp; |
| unsigned long cfm; |
| atomic_t prev_kprobe_index; |
| struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ]; |
| }; |
| |
| #define kretprobe_blacklist_size 0 |
| |
| #define SLOT0_OPCODE_SHIFT (37) |
| #define SLOT1_p1_OPCODE_SHIFT (37 - (64-46)) |
| #define SLOT2_OPCODE_SHIFT (37) |
| |
| #define INDIRECT_CALL_OPCODE (1) |
| #define IP_RELATIVE_CALL_OPCODE (5) |
| #define IP_RELATIVE_BRANCH_OPCODE (4) |
| #define IP_RELATIVE_PREDICT_OPCODE (7) |
| #define LONG_BRANCH_OPCODE (0xC) |
| #define LONG_CALL_OPCODE (0xD) |
| #define flush_insn_slot(p) do { } while (0) |
| |
| typedef struct kprobe_opcode { |
| bundle_t bundle; |
| } kprobe_opcode_t; |
| |
| /* Architecture specific copy of original instruction*/ |
| struct arch_specific_insn { |
| /* copy of the instruction to be emulated */ |
| kprobe_opcode_t *insn; |
| #define INST_FLAG_FIX_RELATIVE_IP_ADDR 1 |
| #define INST_FLAG_FIX_BRANCH_REG 2 |
| #define INST_FLAG_BREAK_INST 4 |
| #define INST_FLAG_BOOSTABLE 8 |
| unsigned long inst_flag; |
| unsigned short target_br_reg; |
| unsigned short slot; |
| }; |
| |
| extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); |
| extern int kprobe_exceptions_notify(struct notifier_block *self, |
| unsigned long val, void *data); |
| |
| extern void arch_remove_kprobe(struct kprobe *p); |
| |
| #endif /* CONFIG_KPROBES */ |
| #endif /* _ASM_KPROBES_H */ |
