MIPS: kprobe: Add support. (c1bf207d) · Commits · 戴 / test

arch/mips/Kconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -10,6 +10,8 @@ config MIPS
		select HAVE_DYNAMIC_FTRACE
		select HAVE_FTRACE_MCOUNT_RECORD
		select HAVE_FUNCTION_GRAPH_TRACER
		select HAVE_KPROBES
		select HAVE_KRETPROBES
		select RTC_LIB if !MACH_LOONGSON

		mainmenu "Linux/MIPS Kernel Configuration"

arch/mips/Makefile

+3 −0

Original line number	Diff line number	Diff line
		@@ -259,6 +259,9 @@ endif
		vmlinux.32: vmlinux
		$(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@


		#obj-$(CONFIG_KPROBES) += kprobes.o

		#
		# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
		# ELF files from 32-bit files by conversion.

arch/mips/include/asm/break.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -30,6 +30,8 @@
		#define BRK_BUG 512 /* Used by BUG() */
		#define BRK_KDB 513 /* Used in KDB_ENTER() */
		#define BRK_MEMU 514 /* Used by FPU emulator */
		#define BRK_KPROBE_BP 515 /* Kprobe break */
		#define BRK_KPROBE_SSTEPBP 516 /* Kprobe single step software implementation */
		#define BRK_MULOVF 1023 /* Multiply overflow */

		#endif /* __ASM_BREAK_H */

arch/mips/include/asm/kdebug.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,9 @@ enum die_val {
		DIE_FP,
		DIE_TRAP,
		DIE_RI,
		DIE_PAGE_FAULT,
		DIE_BREAK,
		DIE_SSTEPBP
		};

		#endif /* _ASM_MIPS_KDEBUG_H */

arch/mips/include/asm/kprobes.h

0 → 100644

+92 −0

Original line number	Diff line number	Diff line
		/*
		* Kernel Probes (KProbes)
		* include/asm-mips/kprobes.h
		*
		* Copyright 2006 Sony Corp.
		* Copyright 2010 Cavium Networks
		*
		* 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 of the License.
		*
		* 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
		*/

		#ifndef _ASM_KPROBES_H
		#define _ASM_KPROBES_H

		#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 { \
		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 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_old_SR;
		unsigned long kprobe_saved_SR;
		unsigned long kprobe_saved_epc;
		unsigned long jprobe_saved_sp;
		struct pt_regs jprobe_saved_regs;
		u8 jprobes_stack[MAX_JPROBES_STACK_SIZE];
		struct prev_kprobe prev_kprobe;
		};

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

		#endif /* _ASM_KPROBES_H */

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