[mirror_ubuntu-bionic-kernel.git] / include / asm-ia64 / kprobes.h

#ifndef _ASM_KPROBES_H
#define _ASM_KPROBES_H
/*
 *  Kernel Probes (KProbes)
 *  include/asm-ia64/kprobes.h
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * 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 <linux/types.h>
#include <linux/ptrace.h>
#include <linux/percpu.h>
#include <asm/break.h>

#define MAX_INSN_SIZE   16
#define BREAK_INST	(long)(__IA64_BREAK_KPROBE << 6)

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 */
struct kprobe_ctlblk {
	unsigned long kprobe_status;
	struct pt_regs jprobe_saved_regs;
	unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE];
	unsigned long *bsp;
	unsigned long cfm;
	struct prev_kprobe prev_kprobe;
};

#define JPROBE_ENTRY(pentry)	(kprobe_opcode_t *)pentry

#define ARCH_SUPPORTS_KRETPROBES

#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 arch_remove_kprobe(p)		do {} while (0)

typedef struct kprobe_opcode {
	bundle_t bundle;
} kprobe_opcode_t;

struct fnptr {
	unsigned long ip;
	unsigned long gp;
};

/* 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
 	unsigned long inst_flag;
 	unsigned short target_br_reg;
};

extern int kprobe_exceptions_notify(struct notifier_block *self,
				    unsigned long val, void *data);

/* ia64 does not need this */
static inline void jprobe_return(void)
{
}
extern void invalidate_stacked_regs(void);
extern void flush_register_stack(void);

#endif				/* _ASM_KPROBES_H */
Commit	Line	Data
fd7b231f AK	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>
8a5c4dc5	29	#include <linux/percpu.h>
fd7b231f AK	30	#include <asm/break.h>
fd7b231f AK	31
9ec4b1f3	32	#define MAX_INSN_SIZE 16
fd7b231f AK	33	#define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6)
fd7b231f AK	34
1674eafc AK	35	typedef union cmp_inst {
	36	struct {
	37	unsigned long long qp : 6;
	38	unsigned long long p1 : 6;
	39	unsigned long long c : 1;
	40	unsigned long long r2 : 7;
	41	unsigned long long r3 : 7;
	42	unsigned long long p2 : 6;
	43	unsigned long long ta : 1;
	44	unsigned long long x2 : 2;
	45	unsigned long long tb : 1;
	46	unsigned long long opcode : 4;
	47	unsigned long long reserved : 23;
	48	}f;
	49	unsigned long long l;
	50	} cmp_inst_t;
	51
8bc76772 RL	52	struct kprobe;
8bc76772 RL	53
fd7b231f AK	54	typedef struct _bundle {
	55	struct {
	56	unsigned long long template : 5;
	57	unsigned long long slot0 : 41;
	58	unsigned long long slot1_p0 : 64-46;
	59	} quad0;
	60	struct {
	61	unsigned long long slot1_p1 : 41 - (64-46);
	62	unsigned long long slot2 : 41;
	63	} quad1;
	64	} __attribute__((__aligned__(16))) bundle_t;
	65
8a5c4dc5 AM	66	struct prev_kprobe {
	67	struct kprobe *kp;
	68	unsigned long status;
	69	};
	70
d3ef1f5a	71	#define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f)
8a5c4dc5 AM	72	/* per-cpu kprobe control block */
	73	struct kprobe_ctlblk {
	74	unsigned long kprobe_status;
	75	struct pt_regs jprobe_saved_regs;
d3ef1f5a ZY	76	unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE];
	77	unsigned long *bsp;
	78	unsigned long cfm;
8a5c4dc5 AM	79	struct prev_kprobe prev_kprobe;
	80	};
	81
fd7b231f AK	82	#define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)pentry
fd7b231f AK	83
9508dbfe RL	84	#define ARCH_SUPPORTS_KRETPROBES
9508dbfe RL	85
cd2675bf AK	86	#define SLOT0_OPCODE_SHIFT (37)
	87	#define SLOT1_p1_OPCODE_SHIFT (37 - (64-46))
	88	#define SLOT2_OPCODE_SHIFT (37)
	89
	90	#define INDIRECT_CALL_OPCODE (1)
	91	#define IP_RELATIVE_CALL_OPCODE (5)
	92	#define IP_RELATIVE_BRANCH_OPCODE (4)
	93	#define IP_RELATIVE_PREDICT_OPCODE (7)
	94	#define LONG_BRANCH_OPCODE (0xC)
	95	#define LONG_CALL_OPCODE (0xD)
0498b635	96	#define arch_remove_kprobe(p) do {} while (0)
cd2675bf	97
fd7b231f AK	98	typedef struct kprobe_opcode {
	99	bundle_t bundle;
	100	} kprobe_opcode_t;
	101
	102	struct fnptr {
	103	unsigned long ip;
	104	unsigned long gp;
	105	};
	106
	107	/* Architecture specific copy of original instruction*/
	108	struct arch_specific_insn {
cd2675bf	109	/* copy of the instruction to be emulated */
fd7b231f	110	kprobe_opcode_t insn;
cd2675bf AK	111	#define INST_FLAG_FIX_RELATIVE_IP_ADDR 1
cd2675bf AK	112	#define INST_FLAG_FIX_BRANCH_REG 2
deac66ae	113	#define INST_FLAG_BREAK_INST 4
cd2675bf AK	114	unsigned long inst_flag;
cd2675bf AK	115	unsigned short target_br_reg;
fd7b231f AK	116	};
fd7b231f AK	117
fd7b231f AK	118	extern int kprobe_exceptions_notify(struct notifier_block *self,
fd7b231f AK	119	unsigned long val, void *data);
9508dbfe RL	120
	121	/* ia64 does not need this */
	122	static inline void jprobe_return(void)
	123	{
	124	}
d3ef1f5a ZY	125	extern void invalidate_stacked_regs(void);
d3ef1f5a ZY	126	extern void flush_register_stack(void);
9508dbfe	127
fd7b231f	128	#endif /* _ASM_KPROBES_H */