[linux-block.git] / arch / ia64 / include / asm / kprobes.h

/* 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 invalidate_stacked_regs(void);
extern void flush_register_stack(void);
extern void arch_remove_kprobe(struct kprobe *p);

#endif /* CONFIG_KPROBES */
#endif /* _ASM_KPROBES_H */
Commit	Line	Data
1a59d1b8	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
fd7b231f AK	2	#ifndef _ASM_KPROBES_H
	3	#define _ASM_KPROBES_H
	4	/*
	5	* Kernel Probes (KProbes)
fd7b231f	6	*
fd7b231f AK	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	*/
7d134b2c LR	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
fd7b231f AK	20	#include <linux/types.h>
fd7b231f AK	21	#include <linux/ptrace.h>
8a5c4dc5	22	#include <linux/percpu.h>
fd7b231f	23
214ddde2	24	#define __ARCH_WANT_KPROBES_INSN_SLOT
34e1ceb1	25	#define MAX_INSN_SIZE 2 /* last half is for kprobe-booster */
34e1ceb1 MH	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 */
fd7b231f	30
1674eafc AK	31	typedef 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
8bc76772 RL	48	struct kprobe;
8bc76772 RL	49
fd7b231f AK	50	typedef 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
8a5c4dc5 AM	62	struct prev_kprobe {
	63	struct kprobe *kp;
	64	unsigned long status;
	65	};
	66
d3ef1f5a	67	#define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f)
8a5c4dc5	68	/* per-cpu kprobe control block */
cdc7dbdf	69	#define ARCH_PREV_KPROBE_SZ 2
8a5c4dc5 AM	70	struct kprobe_ctlblk {
8a5c4dc5 AM	71	unsigned long kprobe_status;
d3ef1f5a ZY	72	unsigned long *bsp;
d3ef1f5a ZY	73	unsigned long cfm;
cdc7dbdf AK	74	atomic_t prev_kprobe_index;
cdc7dbdf AK	75	struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
8a5c4dc5 AM	76	};
8a5c4dc5 AM	77
f438d914	78	#define kretprobe_blacklist_size 0
9508dbfe	79
cd2675bf AK	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)
214ddde2	90	#define flush_insn_slot(p) do { } while (0)
cd2675bf	91
fd7b231f AK	92	typedef struct kprobe_opcode {
	93	bundle_t bundle;
	94	} kprobe_opcode_t;
	95
fd7b231f AK	96	/* Architecture specific copy of original instruction*/
fd7b231f AK	97	struct arch_specific_insn {
cd2675bf	98	/* copy of the instruction to be emulated */
214ddde2	99	kprobe_opcode_t *insn;
cd2675bf AK	100	#define INST_FLAG_FIX_RELATIVE_IP_ADDR 1
cd2675bf AK	101	#define INST_FLAG_FIX_BRANCH_REG 2
deac66ae	102	#define INST_FLAG_BREAK_INST 4
34e1ceb1	103	#define INST_FLAG_BOOSTABLE 8
cd2675bf AK	104	unsigned long inst_flag;
cd2675bf AK	105	unsigned short target_br_reg;
08ed38b6	106	unsigned short slot;
fd7b231f AK	107	};
fd7b231f AK	108
45e18c22	109	extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
fd7b231f AK	110	extern int kprobe_exceptions_notify(struct notifier_block *self,
fd7b231f AK	111	unsigned long val, void *data);
9508dbfe	112
d3ef1f5a ZY	113	extern void invalidate_stacked_regs(void);
d3ef1f5a ZY	114	extern void flush_register_stack(void);
214ddde2	115	extern void arch_remove_kprobe(struct kprobe *p);
9508dbfe	116
7d134b2c LR	117	#endif /* CONFIG_KPROBES */
7d134b2c LR	118	#endif /* _ASM_KPROBES_H */