74a0b57627
x86(-64) are the last architectures still using the page fault notifier cruft for the kprobes page fault hook. This patch converts them to the proper direct calls, and removes the now unused pagefault notifier bits aswell as the cruft in kprobes.c that was related to this mess. I know Andi didn't really like this, but all other architecture maintainers agreed the direct calls are much better and besides the obvious cruft removal a common way of dealing with kprobes across architectures is important aswell. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix sparc64] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Andi Kleen <ak@suse.de> Cc: <linux-arch@vger.kernel.org> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Cc: 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>
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
#ifndef _ASM_S390_KPROBES_H
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#define _ASM_S390_KPROBES_H
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/*
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* Kernel Probes (KProbes)
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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, 2006
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*
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* 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
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* Probes initial implementation ( includes suggestions from
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* Rusty Russell).
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* 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
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* <ananth@in.ibm.com>
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* 2005-Dec Used as a template for s390 by Mike Grundy
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* <grundym@us.ibm.com>
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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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#define __ARCH_WANT_KPROBES_INSN_SLOT
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struct pt_regs;
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struct kprobe;
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typedef u16 kprobe_opcode_t;
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#define BREAKPOINT_INSTRUCTION 0x0002
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/* Maximum instruction size is 3 (16bit) halfwords: */
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#define MAX_INSN_SIZE 0x0003
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#define MAX_STACK_SIZE 64
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#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
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(((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
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? (MAX_STACK_SIZE) \
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: (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
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#define ARCH_SUPPORTS_KRETPROBES
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#define KPROBE_SWAP_INST 0x10
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#define FIXUP_PSW_NORMAL 0x08
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#define FIXUP_BRANCH_NOT_TAKEN 0x04
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#define FIXUP_RETURN_REGISTER 0x02
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#define FIXUP_NOT_REQUIRED 0x01
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/* Architecture specific copy of original instruction */
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struct arch_specific_insn {
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/* copy of original instruction */
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kprobe_opcode_t *insn;
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int fixup;
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int ilen;
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int reg;
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};
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struct ins_replace_args {
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kprobe_opcode_t *ptr;
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kprobe_opcode_t old;
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kprobe_opcode_t new;
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};
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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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unsigned long saved_psw;
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unsigned long kprobe_saved_imask;
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unsigned long kprobe_saved_ctl[3];
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};
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/* per-cpu kprobe control block */
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struct kprobe_ctlblk {
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unsigned long kprobe_status;
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unsigned long kprobe_saved_imask;
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unsigned long kprobe_saved_ctl[3];
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struct pt_regs jprobe_saved_regs;
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unsigned long jprobe_saved_r14;
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unsigned long jprobe_saved_r15;
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struct prev_kprobe prev_kprobe;
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kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
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};
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void arch_remove_kprobe(struct kprobe *p);
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void kretprobe_trampoline(void);
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int is_prohibited_opcode(kprobe_opcode_t *instruction);
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void get_instruction_type(struct arch_specific_insn *ainsn);
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int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
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int kprobe_exceptions_notify(struct notifier_block *self,
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unsigned long val, void *data);
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#define flush_insn_slot(p) do { } while (0)
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#endif /* _ASM_S390_KPROBES_H */
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