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'Cannot find symbol for section 2: .text.' with CONFIG_FUNCTION_TRACER #986

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nathanchance opened this issue Apr 10, 2020 · 1 comment
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'Cannot find symbol for section 2: .text.' with CONFIG_FUNCTION_TRACER #986

nathanchance opened this issue Apr 10, 2020 · 1 comment
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@nathanchance
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With Josh Poimboeuf's series to fix objtool, Nick's elfnote patch, and Masahiro's LLVM{,IAS}=1 patches on top of mainline, using the integrated assembler with CONFIG_FUNCTION_TRACER is broken.

To reproduce:

$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

$ cd linux

$ curl -LSs https://gist.github.com/nathanchance/171b7d672e311b56b4329821b8a43acd/raw/9a1dbb1f11552d0b6efec48ac29505dd0c768d1b/20200401_jpoimboe_objtool_fixes.mbx | git apply -3v

$ curl -LSs https://lore.kernel.org/lkml/[email protected]/raw | git apply -3v

$ curl -LSs 'https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git/patch/?id=7e20e47c70f810d678d02941fa3c671209c4ca97' | git apply -3v --exclude Documentation/kbuild/llvm.rst

$ curl -LSs 'https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git/patch/?id=a0d1c951ef08ed24f35129267e3595d86f57f5d3' | git apply -3v --exclude Documentation/kbuild/llvm.rst

$ ./scripts/config --file arch/x86/configs/x86_64_defconfig -e FUNCTION_TRACER

$ make -j$(nproc) -s LLVM=1 LLVM_IAS=1 O=out/x86_64 distclean defconfig bzImage
@nathanchance nathanchance added [BUG] Untriaged Something isn't working [TOOL] integrated-as The issue is relevant to LLVM integrated assembler [ARCH] x86_64 This bug impacts ARCH=x86_64 labels Apr 10, 2020
@nathanchance nathanchance mentioned this issue Apr 10, 2020
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@nathanchance
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Whoops, did not realize this was already reported as #981.

@nathanchance nathanchance added duplicate This issue or pull request already exists and removed [ARCH] x86_64 This bug impacts ARCH=x86_64 [BUG] Untriaged Something isn't working [TOOL] integrated-as The issue is relevant to LLVM integrated assembler labels Apr 11, 2020
@nathanchance nathanchance mentioned this issue Apr 11, 2020
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