86069782d6
Provides kernel modules a way to register custom page fault handlers. On every page fault this will call a list of registered functions. The functions may handle the fault and force do_page_fault() to return immediately. This functionality is similar to the now removed page fault notifiers. Custom page fault handlers are used by debugging and reverse engineering tools. Mmiotrace is one such tool and a patch to add it into the tree will follow. The custom page fault handlers are called earlier in do_page_fault() than the page fault notifiers were. Signed-off-by: Pekka Paalanen <pq@iki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#ifndef _ASM_X86_KDEBUG_H
|
|
#define _ASM_X86_KDEBUG_H
|
|
|
|
#include <linux/notifier.h>
|
|
|
|
struct pt_regs;
|
|
|
|
/* Grossly misnamed. */
|
|
enum die_val {
|
|
DIE_OOPS = 1,
|
|
DIE_INT3,
|
|
DIE_DEBUG,
|
|
DIE_PANIC,
|
|
DIE_NMI,
|
|
DIE_DIE,
|
|
DIE_NMIWATCHDOG,
|
|
DIE_KERNELDEBUG,
|
|
DIE_TRAP,
|
|
DIE_GPF,
|
|
DIE_CALL,
|
|
DIE_NMI_IPI,
|
|
DIE_PAGE_FAULT,
|
|
DIE_NMIUNKNOWN,
|
|
};
|
|
|
|
extern void printk_address(unsigned long address, int reliable);
|
|
extern void die(const char *, struct pt_regs *,long);
|
|
extern int __must_check __die(const char *, struct pt_regs *, long);
|
|
extern void show_registers(struct pt_regs *regs);
|
|
extern void __show_registers(struct pt_regs *, int all);
|
|
extern void show_trace(struct task_struct *t, struct pt_regs *regs,
|
|
unsigned long *sp, unsigned long bp);
|
|
extern void __show_regs(struct pt_regs *regs);
|
|
extern void show_regs(struct pt_regs *regs);
|
|
extern unsigned long oops_begin(void);
|
|
extern void oops_end(unsigned long, struct pt_regs *, int signr);
|
|
|
|
struct pf_handler {
|
|
struct hlist_node hlist;
|
|
int (*handler)(struct pt_regs *regs, unsigned long error_code,
|
|
unsigned long address);
|
|
};
|
|
|
|
extern void register_page_fault_handler(struct pf_handler *new_pfh);
|
|
extern void unregister_page_fault_handler(struct pf_handler *old_pfh);
|
|
|
|
#endif
|