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#ifndef _ASM_S390_KPROBES_H
#define _ASM_S390_KPROBES_H
/*
* Kernel Probes (KProbes)
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* Copyright (C) IBM Corporation, 2002, 2006
*
* 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
* Probes initial implementation ( includes suggestions from
* Rusty Russell).
* 2004-Nov Modified for PPC64 by Ananth N Mavinakayanahalli
* <ananth@in.ibm.com>
* 2005-Dec Used as a template for s390 by Mike Grundy
* <grundym@us.ibm.com>
*/
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/percpu.h>
#define __ARCH_WANT_KPROBES_INSN_SLOT
struct pt_regs;
struct kprobe;
typedef u16 kprobe_opcode_t;
#define BREAKPOINT_INSTRUCTION 0x0002
/* Maximum instruction size is 3 (16bit) halfwords: */
#define MAX_INSN_SIZE 0x0003
#define MAX_STACK_SIZE 64
#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \
(((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \
? (MAX_STACK_SIZE) \
: (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR)))
#define ARCH_SUPPORTS_KRETPROBES
#define KPROBE_SWAP_INST 0x10
#define FIXUP_PSW_NORMAL 0x08
#define FIXUP_BRANCH_NOT_TAKEN 0x04
#define FIXUP_RETURN_REGISTER 0x02
#define FIXUP_NOT_REQUIRED 0x01
/* Architecture specific copy of original instruction */
struct arch_specific_insn {
/* copy of original instruction */
kprobe_opcode_t *insn;
int fixup;
int ilen;
int reg;
};
struct ins_replace_args {
kprobe_opcode_t *ptr;
kprobe_opcode_t old;
kprobe_opcode_t new;
};
struct prev_kprobe {
struct kprobe *kp;
unsigned long status;
unsigned long saved_psw;
unsigned long kprobe_saved_imask;
unsigned long kprobe_saved_ctl[3];
};
/* per-cpu kprobe control block */
struct kprobe_ctlblk {
unsigned long kprobe_status;
unsigned long kprobe_saved_imask;
unsigned long kprobe_saved_ctl[3];
struct pt_regs jprobe_saved_regs;
unsigned long jprobe_saved_r14;
unsigned long jprobe_saved_r15;
struct prev_kprobe prev_kprobe;
kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE];
};
void arch_remove_kprobe(struct kprobe *p);
void kretprobe_trampoline(void);
int is_prohibited_opcode(kprobe_opcode_t *instruction);
void get_instruction_type(struct arch_specific_insn *ainsn);
int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
int kprobe_exceptions_notify(struct notifier_block *self,
unsigned long val, void *data);
#define flush_insn_slot(p) do { } while (0)
#endif /* _ASM_S390_KPROBES_H */
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