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| author | Brian Gerst <brgerst@gmail.com> | 2009-10-12 10:18:23 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-12 18:29:46 +0200 |
| commit | ae24ffe5ecec17c956ac25371d7c2e12b4b36e53 (patch) | |
| tree | dac0241dcc85e8ec6e8fe25705fce8bf7f4ea57e /arch/x86/mm/extable.c | |
| parent | f3834b9ef68067199486740b31f691afb14dbdf5 (diff) | |
| download | op-kernel-dev-ae24ffe5ecec17c956ac25371d7c2e12b4b36e53.zip op-kernel-dev-ae24ffe5ecec17c956ac25371d7c2e12b4b36e53.tar.gz | |
x86, 64-bit: Move K8 B step iret fixup to fault entry asm
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>
Diffstat (limited to 'arch/x86/mm/extable.c')
| -rw-r--r-- | arch/x86/mm/extable.c | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c index 61b41ca..d0474ad 100644 --- a/arch/x86/mm/extable.c +++ b/arch/x86/mm/extable.c @@ -35,34 +35,3 @@ int fixup_exception(struct pt_regs *regs) return 0; } - -#ifdef CONFIG_X86_64 -/* - * Need to defined our own search_extable on X86_64 to work around - * a B stepping K8 bug. - */ -const struct exception_table_entry * -search_extable(const struct exception_table_entry *first, - const struct exception_table_entry *last, - unsigned long value) -{ - /* B stepping K8 bug */ - if ((value >> 32) == 0) - value |= 0xffffffffUL << 32; - - while (first <= last) { - const struct exception_table_entry *mid; - long diff; - - mid = (last - first) / 2 + first; - diff = mid->insn - value; - if (diff == 0) - return mid; - else if (diff < 0) - first = mid+1; - else - last = mid-1; - } - return NULL; -} -#endif |
