[mirror_ubuntu-jammy-kernel.git] / arch / mips / include / asm / kprobes.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 *  Kernel Probes (KProbes)
 *  include/asm-mips/kprobes.h
 *
 *  Copyright 2006 Sony Corp.
 *  Copyright 2010 Cavium Networks
 */

#ifndef _ASM_KPROBES_H
#define _ASM_KPROBES_H

#include <asm-generic/kprobes.h>

#ifdef CONFIG_KPROBES
#include <linux/ptrace.h>
#include <linux/types.h>

#include <asm/cacheflush.h>
#include <asm/kdebug.h>
#include <asm/inst.h>

#define	 __ARCH_WANT_KPROBES_INSN_SLOT

struct kprobe;
struct pt_regs;

typedef union mips_instruction kprobe_opcode_t;

#define MAX_INSN_SIZE 2

#define flush_insn_slot(p)						\
do {									\
	if (p->addr)							\
		flush_icache_range((unsigned long)p->addr,		\
			   (unsigned long)p->addr +			\
			   (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)));	\
} while (0)


#define kretprobe_blacklist_size 0

void arch_remove_kprobe(struct kprobe *p);

/* Architecture specific copy of original instruction*/
struct arch_specific_insn {
	/* copy of the original instruction */
	kprobe_opcode_t *insn;
};

struct prev_kprobe {
	struct kprobe *kp;
	unsigned long status;
	unsigned long old_SR;
	unsigned long saved_SR;
	unsigned long saved_epc;
};

#define SKIP_DELAYSLOT 0x0001

/* per-cpu kprobe control block */
struct kprobe_ctlblk {
	unsigned long kprobe_status;
	unsigned long kprobe_old_SR;
	unsigned long kprobe_saved_SR;
	unsigned long kprobe_saved_epc;
	/* Per-thread fields, used while emulating branches */
	unsigned long flags;
	unsigned long target_epc;
	struct prev_kprobe prev_kprobe;
};

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

#endif /* CONFIG_KPROBES */
#endif /* _ASM_KPROBES_H */
Commit	Line	Data
873e65bc	1	/* SPDX-License-Identifier: GPL-2.0-only */
c1bf207d DD	2	/*
	3	* Kernel Probes (KProbes)
	4	* include/asm-mips/kprobes.h
	5	*
	6	* Copyright 2006 Sony Corp.
	7	* Copyright 2010 Cavium Networks
c1bf207d DD	8	*/
	9
	10	#ifndef _ASM_KPROBES_H
	11	#define _ASM_KPROBES_H
	12
7d134b2c LR	13	#include <asm-generic/kprobes.h>
	14
	15	#ifdef CONFIG_KPROBES
c1bf207d DD	16	#include <linux/ptrace.h>
	17	#include <linux/types.h>
	18
	19	#include <asm/cacheflush.h>
	20	#include <asm/kdebug.h>
	21	#include <asm/inst.h>
	22
70342287	23	#define __ARCH_WANT_KPROBES_INSN_SLOT
c1bf207d DD	24
	25	struct kprobe;
	26	struct pt_regs;
	27
	28	typedef union mips_instruction kprobe_opcode_t;
	29
	30	#define MAX_INSN_SIZE 2
	31
	32	#define flush_insn_slot(p) \
	33	do { \
698b8510 MN	34	if (p->addr) \
698b8510 MN	35	flush_icache_range((unsigned long)p->addr, \
c1bf207d DD	36	(unsigned long)p->addr + \
	37	(MAX_INSN_SIZE * sizeof(kprobe_opcode_t))); \
	38	} while (0)
	39
	40
	41	#define kretprobe_blacklist_size 0
	42
	43	void arch_remove_kprobe(struct kprobe *p);
	44
	45	/* Architecture specific copy of original instruction*/
	46	struct arch_specific_insn {
	47	/* copy of the original instruction */
	48	kprobe_opcode_t *insn;
	49	};
	50
	51	struct prev_kprobe {
	52	struct kprobe *kp;
	53	unsigned long status;
	54	unsigned long old_SR;
	55	unsigned long saved_SR;
	56	unsigned long saved_epc;
	57	};
	58
6457a396 MS	59	#define SKIP_DELAYSLOT 0x0001
6457a396 MS	60
c1bf207d DD	61	/* per-cpu kprobe control block */
	62	struct kprobe_ctlblk {
	63	unsigned long kprobe_status;
	64	unsigned long kprobe_old_SR;
	65	unsigned long kprobe_saved_SR;
	66	unsigned long kprobe_saved_epc;
6457a396 MS	67	/* Per-thread fields, used while emulating branches */
	68	unsigned long flags;
	69	unsigned long target_epc;
c1bf207d DD	70	struct prev_kprobe prev_kprobe;
	71	};
	72
	73	extern int kprobe_exceptions_notify(struct notifier_block *self,
	74	unsigned long val, void *data);
	75
7d134b2c LR	76	#endif /* CONFIG_KPROBES */
7d134b2c LR	77	#endif /* _ASM_KPROBES_H */