Messages in this thread Patch in this message | | | Date | Wed, 19 Apr 2006 12:01:00 -0700 | From | Anil S Keshavamurthy <> | Subject | [patch 1/6] Notify page fault call chain for i386 |
| |
--- arch/i386/kernel/traps.c | 12 ++++++++++++ arch/i386/mm/fault.c | 4 ++-- include/asm-i386/kdebug.h | 15 +++++++++++++++ 3 files changed, 29 insertions(+), 2 deletions(-)
Index: linux-2.6.17-rc1-mm3/arch/i386/kernel/traps.c =================================================================== --- linux-2.6.17-rc1-mm3.orig/arch/i386/kernel/traps.c +++ linux-2.6.17-rc1-mm3/arch/i386/kernel/traps.c @@ -93,6 +93,7 @@ asmlinkage void machine_check(void); static int kstack_depth_to_print = 24; ATOMIC_NOTIFIER_HEAD(i386die_chain); +ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain); int register_die_notifier(struct notifier_block *nb) { @@ -107,6 +108,17 @@ int unregister_die_notifier(struct notif } EXPORT_SYMBOL(unregister_die_notifier); +int register_page_fault_notifier(struct notifier_block *nb) +{ + vmalloc_sync_all(); + return atomic_notifier_chain_register(¬ify_page_fault_chain, nb); +} + +int unregister_page_fault_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(¬ify_page_fault_chain, nb); +} + static inline int valid_stack_ptr(struct thread_info *tinfo, void *p) { return p > (void *)tinfo && Index: linux-2.6.17-rc1-mm3/arch/i386/mm/fault.c =================================================================== --- linux-2.6.17-rc1-mm3.orig/arch/i386/mm/fault.c +++ linux-2.6.17-rc1-mm3/arch/i386/mm/fault.c @@ -321,7 +321,7 @@ fastcall void __kprobes do_page_fault(st if (unlikely(address >= TASK_SIZE)) { if (!(error_code & 0x0000000d) && vmalloc_fault(address) >= 0) return; - if (notify_die(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, + if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, SIGSEGV) == NOTIFY_STOP) return; /* @@ -331,7 +331,7 @@ fastcall void __kprobes do_page_fault(st goto bad_area_nosemaphore; } - if (notify_die(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, + if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14, SIGSEGV) == NOTIFY_STOP) return; Index: linux-2.6.17-rc1-mm3/include/asm-i386/kdebug.h =================================================================== --- linux-2.6.17-rc1-mm3.orig/include/asm-i386/kdebug.h +++ linux-2.6.17-rc1-mm3/include/asm-i386/kdebug.h @@ -19,7 +19,10 @@ struct die_args { extern int register_die_notifier(struct notifier_block *); extern int unregister_die_notifier(struct notifier_block *); +extern int register_page_fault_notifier(struct notifier_block *); +extern int unregister_page_fault_notifier(struct notifier_block *); extern struct atomic_notifier_head i386die_chain; +extern struct atomic_notifier_head notify_page_fault_chain; /* Grossly misnamed. */ @@ -53,4 +56,16 @@ static inline int notify_die(enum die_va return atomic_notifier_call_chain(&i386die_chain, val, &args); } +static inline int notify_page_fault(enum die_val val, const char *str, + struct pt_regs *regs, long err, int trap, int sig) +{ + struct die_args args = { + .regs = regs, + .str = str, + .err = err, + .trapnr = trap, + .signr = sig + }; + return atomic_notifier_call_chain(¬ify_page_fault_chain, val, &args); +} #endif -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |