Joe Perches wrote:
On Tue, 2009-07-21 at 17:57 -0500, Matt Mackall wrote:
On Tue, 2009-07-21 at 14:56 -0700, Joe Perches wrote:
On Tue, 2009-07-21 at 16:48 -0500, Matt Mackall wrote:
On Tue, 2009-07-21 at 14:20 -0700, Joe Perches wrote:
Is moving constant string formats to __devinitconst or __initdata
useful for embedded environments?
Interesting notion, but not worth the trouble in my mind. I think it's
more worthwhile to look into automatic such stuff in the build somehow.
I think it's not possible today to get gcc to mark
the format strings without source modification.
Yep, that's why I specifically said 'build'. It can probably be done in
a post-processing step with some ELF wizardry.
Know any elven wizards?
It would be tricky, the string data from the entire compilation unit is
intermingled. You would have to separate out only those strings
referenced from __init sections into their own section and fix up all
symbols and relocations that were affected.
Probably easier would be to use the plug-in feature that will be part of
GCC-4.5 (or will that be called GCC-5.0??), and create a special Linux
kernel GCC plug-in that just emits the __init literal strings to the
proper section to begin with. This wouldn't be unprecedented, the
Mozilla people already use their own extensions to GCC, and will
probably migrate to GCC plug-ins. We don't want the kernel to get left
behind in the GCC plug-in race.
David Daney
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