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Commit 3fa17c39 authored by Tony Lu's avatar Tony Lu Committed by Chris Metcalf
Browse files

tile: support kprobes on tilegx 



This change includes support for Kprobes, Jprobes and Return Probes.

Reviewed-by: default avatarMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: default avatarTony Lu <zlu@tilera.com>
Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
parent a61fd5e3

arch/tile/Kconfig

+2 −0
Original line number Original line Diff line number Diff line
@@ -125,6 +125,8 @@ config TILEGX 
	select HAVE_FUNCTION_GRAPH_TRACER

	select HAVE_FUNCTION_GRAPH_TRACER

	select HAVE_DYNAMIC_FTRACE

	select HAVE_DYNAMIC_FTRACE

	select HAVE_FTRACE_MCOUNT_RECORD

	select HAVE_FTRACE_MCOUNT_RECORD

	select HAVE_KPROBES

	select HAVE_KRETPROBES





config TILEPRO

config TILEPRO

	def_bool !TILEGX

	def_bool !TILEGX

arch/tile/include/asm/Kbuild

+0 −1
Original line number Original line Diff line number Diff line
@@ -15,7 +15,6 @@ generic-y += ioctl.h 
generic-y += ioctls.h

generic-y += ioctls.h

generic-y += ipcbuf.h

generic-y += ipcbuf.h

generic-y += irq_regs.h

generic-y += irq_regs.h

generic-y += kdebug.h

generic-y += local.h

generic-y += local.h

generic-y += msgbuf.h

generic-y += msgbuf.h

generic-y += mutex.h

generic-y += mutex.h

arch/tile/include/asm/kdebug.h

0 → 100644
+28 −0
Original line number Original line Diff line number Diff line 
/*

 * Copyright 2012 Tilera Corporation. All Rights Reserved.

 *

 *   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, version 2.

 *

 *   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, GOOD TITLE or

 *   NON INFRINGEMENT.  See the GNU General Public License for

 *   more details.

 */



#ifndef _ASM_TILE_KDEBUG_H

#define _ASM_TILE_KDEBUG_H



#include <linux/notifier.h>



enum die_val {

	DIE_OOPS = 1,

	DIE_BREAK,

	DIE_SSTEPBP,

	DIE_PAGE_FAULT,

	DIE_COMPILED_BPT

};



#endif /* _ASM_TILE_KDEBUG_H */

arch/tile/include/asm/kprobes.h

0 → 100644
+79 −0
Original line number Original line Diff line number Diff line 
/*

 * arch/tile/include/asm/kprobes.h

 *

 * Copyright 2012 Tilera Corporation. All Rights Reserved.

 *

 *   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, version 2.

 *

 *   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, GOOD TITLE or

 *   NON INFRINGEMENT.  See the GNU General Public License for

 *   more details.

 */



#ifndef _ASM_TILE_KPROBES_H

#define _ASM_TILE_KPROBES_H



#include <linux/types.h>

#include <linux/ptrace.h>

#include <linux/percpu.h>



#include <arch/opcode.h>



#define __ARCH_WANT_KPROBES_INSN_SLOT

#define MAX_INSN_SIZE			2



#define kretprobe_blacklist_size 0



typedef tile_bundle_bits kprobe_opcode_t;



#define flush_insn_slot(p)						\

	flush_icache_range((unsigned long)p->addr,			\

			   (unsigned long)p->addr +			\

			   (MAX_INSN_SIZE * sizeof(kprobe_opcode_t)))



struct kprobe;



/* Architecture specific copy of original instruction. */

struct arch_specific_insn {

	kprobe_opcode_t *insn;

};



struct prev_kprobe {

	struct kprobe *kp;

	unsigned long status;

	unsigned long saved_pc;

};



#define MAX_JPROBES_STACK_SIZE 128

#define MAX_JPROBES_STACK_ADDR \

	(((unsigned long)current_thread_info()) + THREAD_SIZE - 32 \

		- sizeof(struct pt_regs))



#define MIN_JPROBES_STACK_SIZE(ADDR)					\

	((((ADDR) + MAX_JPROBES_STACK_SIZE) > MAX_JPROBES_STACK_ADDR)	\

		? MAX_JPROBES_STACK_ADDR - (ADDR)			\

		: MAX_JPROBES_STACK_SIZE)



/* per-cpu kprobe control block. */

struct kprobe_ctlblk {

	unsigned long kprobe_status;

	unsigned long kprobe_saved_pc;

	unsigned long jprobe_saved_sp;

	struct prev_kprobe prev_kprobe;

	struct pt_regs jprobe_saved_regs;

	char jprobes_stack[MAX_JPROBES_STACK_SIZE];

};



extern tile_bundle_bits breakpoint2_insn;

extern tile_bundle_bits breakpoint_insn;



void arch_remove_kprobe(struct kprobe *);



extern int kprobe_exceptions_notify(struct notifier_block *self,

			     unsigned long val, void *data);



#endif /* _ASM_TILE_KPROBES_H */

arch/tile/include/asm/ptrace.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -33,6 +33,7 @@ typedef unsigned long pt_reg_t; 




#ifndef __ASSEMBLY__

#ifndef __ASSEMBLY__





#define regs_return_value(regs) ((regs)->regs[0])

#define instruction_pointer(regs) ((regs)->pc)

#define instruction_pointer(regs) ((regs)->pc)

#define profile_pc(regs) instruction_pointer(regs)

#define profile_pc(regs) instruction_pointer(regs)

#define user_stack_pointer(regs) ((regs)->sp)

#define user_stack_pointer(regs) ((regs)->sp)