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The ElfConvert routines in GenFw don't handle the ".eh_frame" ELF section emitted by gcc. For this reason, Leif disabled the generation of that section for AARCH64 with "-fno-asynchronous-unwind-tables" in commit 28e80befa4fe [1], and Ard did the same for IA32 and X64 in commit 26ecc55c027d [2]. (The CLANG38 toolchain received the same flag at its inception, in commit 6f756db5ea05 [3].) However, ".eh_frame" is back now; in upstream gcc commit 9cbee213b579 [4] (part of tag "gcc-8_1_0-release"), both "-fasynchronous-unwind-tables" and "-funwind-tables" were made the default for AARCH64. (The patch author described the effects on the gcc mailing list [5].) We have to counter the latter flag with "-fno-unwind-tables", otherwise GenFw chokes on ".eh_frame" again (triggered for example on Fedora 28). "-f[no-]unwind-tables" goes back to at least gcc-4.4 [6], so it's safe to add to GCC_AARCH64_CC_FLAGS. [1] https://github.com/tianocore/edk2/commit/28e80befa4fe [2] https://github.com/tianocore/edk2/commit/26ecc55c027d [3] https://github.com/tianocore/edk2/commit/6f756db5ea05 [4] https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=9cbee213b579 [5] http://mid.mail-archive.com/7b28c03a-c032-6cec-c127-1c12cbe98eeb@foss.arm.com [6] https://gcc.gnu.org/onlinedocs/gcc-4.4.7/gcc/Code-Gen-Options.html Cc: "Danilo C. L. de Paula" <ddepaula@redhat.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Cole Robinson <crobinso@redhat.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Leif Lindholm <leif.lindholm@linaro.org> Cc: Liming Gao <liming.gao@intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Yonghong Zhu <yonghong.zhu@intel.com> Reported-by: "Danilo C. L. de Paula" <ddepaula@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Liming Gao <liming.gao@intel.com>
EDK II Project
A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org.
Contributions to the EDK II open source project are covered by the TianoCore Contribution Agreement 1.1
The majority of the content in the EDK II open source project uses a BSD 2-Clause License. The EDK II open source project contains the following components that are covered by additional licenses:
- AppPkg/Applications/Python/Python-2.7.2/Tools/pybench
- AppPkg/Applications/Python/Python-2.7.2
- AppPkg/Applications/Python/Python-2.7.10
- BaseTools/Source/C/BrotliCompress
- MdeModulePkg/Library/BrotliCustomDecompressLib
- OvmfPkg
- CryptoPkg/Library/OpensslLib/openssl
The EDK II Project is composed of packages. The maintainers for each package are listed in Maintainers.txt.