x86, build: Change code16gcc.h from a C header to an assembly header

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By changing code16gcc.h from a C header to an assembly header and use
the -Wa,... option to gcc to force it to be added to the assembly
input, we can avoid the problems with gcc reordering code bits on us.

If we have -m16, we still use it, of course.

Suggested-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-xw8ibgdemucl9fz3i1bymu6w@git.kernel.org

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H. Peter Anvin 2014-06-04 13:16:48 -07:00

parent a9358bc353

commit a9cfccee66

2 changed files with 13 additions and 20 deletions

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9

arch/x86/Makefile

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24

arch/x86/boot/code16gcc.h

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