Commit c54a354c authored May 18, 2012 by H. Peter Anvin

x86, relocs: More relocations which may end up as absolute



GNU ld 2.22.52.0.1 has a bug that it blindly changes symbols from
section-relative to absolute if they are in a section of zero length.
This turns the symbols __init_begin and __init_end into absolute
symbols.  Let the relocs program know that those should be treated as
relative symbols.

This bug is exposed by checkin

433de739 x86, realmode: 16-bit real-mode code support for relocs tool

only in the sense that that checkin changes the relocs tool to report
an error instead of silently generating a kernel which is broken if
relocated.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: H.J. Lu <hjl.tools@gmail.com>
Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com>

parent bea3f878

arch/x86/tools/relocs.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -56,7 +56,11 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
		* as absolute (typically defined outside any section in the linker script.)
		*/
		[S_REL] =
		"^(__init_begin\|__init_end\|_end)$"
		"^(__init_(begin\|end)\|"
		"__x86_cpu_dev_(start\|end)\|"
		"(__parainstructions\|__alt_instructions)(\|_end)\|"
		"(__iommu_table\|__apicdrivers\|__smp_locks)(\|_end)\|"
		"_end)$"
		};

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