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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef __ASM_UPROBES_H
#define __ASM_UPROBES_H
#include <linux/notifier.h>
#include <linux/types.h>
#include <asm/break.h>
#include <asm/inst.h>
/*
* We want this to be defined as union mips_instruction but that makes the
* generic code blow up.
*/
typedef u32 uprobe_opcode_t;
/*
* Classic MIPS (note this implementation doesn't consider microMIPS yet)
* instructions are always 4 bytes but in order to deal with branches and
* their delay slots, we treat instructions as having 8 bytes maximum.
*/
#define MAX_UINSN_BYTES 8
#define UPROBE_XOL_SLOT_BYTES 128 /* Max. cache line size */
#define UPROBE_BRK_UPROBE 0x000d000d /* break 13 */
#define UPROBE_BRK_UPROBE_XOL 0x000e000d /* break 14 */
#define UPROBE_SWBP_INSN UPROBE_BRK_UPROBE
#define UPROBE_SWBP_INSN_SIZE 4
struct arch_uprobe {
unsigned long resume_epc;
u32 insn[2];
u32 ixol[2];
};
struct arch_uprobe_task {
unsigned long saved_trap_nr;
};
extern int arch_uprobe_analyze_insn(struct arch_uprobe *aup,
struct mm_struct *mm, unsigned long addr);
extern int arch_uprobe_pre_xol(struct arch_uprobe *aup, struct pt_regs *regs);
extern int arch_uprobe_post_xol(struct arch_uprobe *aup, struct pt_regs *regs);
extern bool arch_uprobe_xol_was_trapped(struct task_struct *tsk);
extern int arch_uprobe_exception_notify(struct notifier_block *self,
unsigned long val, void *data);
extern void arch_uprobe_abort_xol(struct arch_uprobe *aup,
struct pt_regs *regs);
extern unsigned long arch_uretprobe_hijack_return_addr(
unsigned long trampoline_vaddr, struct pt_regs *regs);
#endif /* __ASM_UPROBES_H */