Messages in this thread Patch in this message | | | From | "H. Peter Anvin" <> | Subject | [x86 setup 13/33] Header file to produce 16-bit code with gcc | Date | Wed, 11 Jul 2007 12:18:38 -0700 |
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From: H. Peter Anvin <hpa@zytor.com>
gcc for i386 can be used with the assembly prefix ".code16gcc" to generate 16-bit (real-mode) code. This header file provides the assembly prefix.
Signed-off-by: H. Peter Anvin <hpa@zytor.com> --- arch/i386/boot/code16gcc.h | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) create mode 100644 arch/i386/boot/code16gcc.h
diff --git a/arch/i386/boot/code16gcc.h b/arch/i386/boot/code16gcc.h new file mode 100644 index 0000000..3bd8480 --- /dev/null +++ b/arch/i386/boot/code16gcc.h @@ -0,0 +1,15 @@ +/* + * code16gcc.h + * + * This file is -include'd when compiling 16-bit C code. + * Note: this asm() needs to be emitted before gcc omits any code. + * Depending on gcc version, this requires -fno-unit-at-a-time or + * -fno-toplevel-reorder. + * + * Hopefully gcc will eventually have a real -m16 option so we can + * drop this hack long term. + */ + +#ifndef __ASSEMBLY__ +asm(".code16gcc"); +#endif -- 1.5.2.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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