Re: [PATCH] i386: make BUG() expansion look like instruction
From: Jeremy Fitzhardinge
Date: Wed Nov 08 2006 - 15:43:27 EST
Hugh Dickins wrote:
On Wed, 8 Nov 2006, Jan Beulich wrote:
This gets i386's handle_BUG() in sync with x86-64's, namely introducing
a 'struct bug_frame' and arranging for the code generated by the BUG()
macro to represent an instruction, so that disassembling code
containing such constructs doesn't produce garbage anymore. The
resulting increase of code size is marginal (1 byte per instance).
I thought we were heading towards merging Jeremy's generic-bug-*
(with file and line in another section), in -mm for a while now?
That's certainly my impression. Andrew already NAKed my original patch
which did something similar to Jan's, in favour of making the powerpc
BUG handling code generic. I'm hoping the generic bug can be put in
mainline fairly soon, and then encourage other arch maintainers to use it.
I think there's still some question in the air over powerpc's use of the
generic bug stuff, but as far as I know Andrew is the only person to
have a problem with it.
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