Eric Lee / smarc-fsl-linux-kernel | Embedian Git Server

a9cfccee6 x86, build: Change code16gcc.h from a C header to an assembly header ... Browse Code »

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
Signed-off-by: H. Peter Anvin
Link: http://lkml.kernel.org/n/tip-xw8ibgdemucl9fz3i1bymu6w@git.kernel.org

H. Peter Anvin
2014-06-05 04:16:48 +0800

code16gcc.h 277 Bytes

edit raw blame history

1 2 3 4 5 6 7 8 9 10 11

#
# code16gcc.h
#
# This file is added to the assembler via -Wa when compiling 16-bit C code.
# This is done this way instead via asm() to make sure gcc does not reorder
# things around us.
#
# gcc 4.9+ has a real -m16 option so we can drop this hack long term.
#

	.code16gcc