Messages in this thread | | | Date | Mon, 05 Jan 2009 19:06:22 -0800 | From | Hiroshi Shimamoto <> | Subject | [RFC -tip 0/4] x86: reduce fixup of uaccess |
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This is my second try to reduce fixup code size for exceptions of uaccess.
This patch series reduces fixup code for exceptions of uaccess in signal.
I gave up to make direct jump to end of function when an exception occurs. However, I thought fixup code could be reduced. The concept is that to add uaccess_err in thread_info and set it to -EFAULT on exception, finally check this value on the last of function.
Is this good to reduce code size?
The code size reductions are below; $ size *signal*.o.* text data bss dec hex filename 4741 0 0 4741 1285 ia32_signal.o.new 6006 0 0 6006 1776 ia32_signal.o.old 3577 0 0 3577 df9 signal.o.new 4540 0 0 4540 11bc signal.o.old 3855 0 0 3855 f0f signal32.o.new 4876 0 0 4876 130c signal32.o.old
Thanks, Hiroshi
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