forked from luck/tmp_suning_uos_patched
f438d914b2
Introduce architecture dependent kretprobe blacklists to prohibit users from inserting return probes on the function in which kprobes can be inserted but kretprobes can not. This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and registers "__switch_to" to the blacklist on x86-64, because that mark is to prohibit user from inserting only kretprobe. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
#ifndef _ASM_KPROBES_H
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#define _ASM_KPROBES_H
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/*
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* Kernel Probes (KProbes)
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* include/asm-ia64/kprobes.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) IBM Corporation, 2002, 2004
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* Copyright (C) Intel Corporation, 2005
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*
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* 2005-Apr Rusty Lynch <rusty.lynch@intel.com> and Anil S Keshavamurthy
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* <anil.s.keshavamurthy@intel.com> adapted from i386
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*/
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#include <linux/types.h>
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#include <linux/ptrace.h>
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#include <linux/percpu.h>
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#include <asm/break.h>
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#define __ARCH_WANT_KPROBES_INSN_SLOT
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#define MAX_INSN_SIZE 1
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#define BREAK_INST (long)(__IA64_BREAK_KPROBE << 6)
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typedef union cmp_inst {
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struct {
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unsigned long long qp : 6;
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unsigned long long p1 : 6;
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unsigned long long c : 1;
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unsigned long long r2 : 7;
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unsigned long long r3 : 7;
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unsigned long long p2 : 6;
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unsigned long long ta : 1;
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unsigned long long x2 : 2;
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unsigned long long tb : 1;
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unsigned long long opcode : 4;
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unsigned long long reserved : 23;
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}f;
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unsigned long long l;
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} cmp_inst_t;
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struct kprobe;
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typedef struct _bundle {
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struct {
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unsigned long long template : 5;
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unsigned long long slot0 : 41;
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unsigned long long slot1_p0 : 64-46;
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} quad0;
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struct {
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unsigned long long slot1_p1 : 41 - (64-46);
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unsigned long long slot2 : 41;
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} quad1;
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} __attribute__((__aligned__(16))) bundle_t;
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struct prev_kprobe {
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struct kprobe *kp;
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unsigned long status;
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};
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#define MAX_PARAM_RSE_SIZE (0x60+0x60/0x3f)
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/* per-cpu kprobe control block */
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#define ARCH_PREV_KPROBE_SZ 2
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struct kprobe_ctlblk {
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unsigned long kprobe_status;
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struct pt_regs jprobe_saved_regs;
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unsigned long jprobes_saved_stacked_regs[MAX_PARAM_RSE_SIZE];
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unsigned long *bsp;
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unsigned long cfm;
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atomic_t prev_kprobe_index;
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struct prev_kprobe prev_kprobe[ARCH_PREV_KPROBE_SZ];
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};
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#define ARCH_SUPPORTS_KRETPROBES
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#define kretprobe_blacklist_size 0
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#define SLOT0_OPCODE_SHIFT (37)
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#define SLOT1_p1_OPCODE_SHIFT (37 - (64-46))
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#define SLOT2_OPCODE_SHIFT (37)
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#define INDIRECT_CALL_OPCODE (1)
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#define IP_RELATIVE_CALL_OPCODE (5)
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#define IP_RELATIVE_BRANCH_OPCODE (4)
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#define IP_RELATIVE_PREDICT_OPCODE (7)
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#define LONG_BRANCH_OPCODE (0xC)
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#define LONG_CALL_OPCODE (0xD)
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#define flush_insn_slot(p) do { } while (0)
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typedef struct kprobe_opcode {
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bundle_t bundle;
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} kprobe_opcode_t;
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struct fnptr {
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unsigned long ip;
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unsigned long gp;
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};
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/* Architecture specific copy of original instruction*/
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struct arch_specific_insn {
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/* copy of the instruction to be emulated */
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kprobe_opcode_t *insn;
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#define INST_FLAG_FIX_RELATIVE_IP_ADDR 1
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#define INST_FLAG_FIX_BRANCH_REG 2
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#define INST_FLAG_BREAK_INST 4
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unsigned long inst_flag;
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unsigned short target_br_reg;
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unsigned short slot;
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};
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extern int kprobes_fault_handler(struct pt_regs *regs, int trapnr);
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extern int kprobe_exceptions_notify(struct notifier_block *self,
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unsigned long val, void *data);
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/* ia64 does not need this */
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static inline void jprobe_return(void)
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{
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}
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extern void invalidate_stacked_regs(void);
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extern void flush_register_stack(void);
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extern void arch_remove_kprobe(struct kprobe *p);
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#endif /* _ASM_KPROBES_H */
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