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* x86, 64-bit: Move K8 B step iret fixup to fault entry asmBrian Gerst2009-10-121-31/+0
| | | | | | | | | | | | | Move the handling of truncated %rip from an iret fault to the fault entry path. This allows x86-64 to use the standard search_extable() function. Signed-off-by: Brian Gerst <brgerst@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jan Beulich <jbeulich@novell.com> LKML-Reference: <1255357103-5418-1-git-send-email-brgerst@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: uaccess: introduce try and catch frameworkHiroshi Shimamoto2009-01-231-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: introduce new uaccess exception handling framework Introduce {get|put}_user_try and {get|put}_user_catch as new uaccess exception handling framework. {get|put}_user_try begins exception block and {get|put}_user_catch(err) ends the block and gets err if an exception occured in {get|put}_user_ex() in the block. The exception is stored thread_info->uaccess_err. The example usage of this framework is below; int func() { int err = 0; get_user_try { get_user_ex(...); get_user_ex(...); : } get_user_catch(err); return err; } Note: get_user_ex() is not clear the value when an exception occurs, it's different from the behavior of __get_user(), but I think it doesn't matter. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86: unify extable_{32|64}.cHarvey Harrison2008-01-301-0/+62
Introduce fixup_exception() on 64-bit and use it in kprobes to eliminate an #ifdef. Only 64-bit needs search_extable() due to a stepping bug. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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