mirror of https://github.com/acidanthera/audk.git
9222154ae7
gcc-8 (which is part of Fedora 28) enables the new warning "-Wrestrict" in "-Wall". This warning is documented in detail at <https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html>; the introduction says > Warn when an object referenced by a restrict-qualified parameter (or, in > C++, a __restrict-qualified parameter) is aliased by another argument, > or when copies between such objects overlap. It breaks the BaseTools build (in the Brotli compression library) with: > In function 'ProcessCommandsInternal', > inlined from 'ProcessCommands' at dec/decode.c:1828:10: > dec/decode.c:1781:9: error: 'memcpy' accessing between 17 and 2147483631 > bytes at offsets 16 and 16 overlaps between 17 and 2147483631 bytes at > offset 16 [-Werror=restrict] > memcpy(copy_dst + 16, copy_src + 16, (size_t)(i - 16)); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > In function 'ProcessCommandsInternal', > inlined from 'SafeProcessCommands' at dec/decode.c:1833:10: > dec/decode.c:1781:9: error: 'memcpy' accessing between 17 and 2147483631 > bytes at offsets 16 and 16 overlaps between 17 and 2147483631 bytes at > offset 16 [-Werror=restrict] > memcpy(copy_dst + 16, copy_src + 16, (size_t)(i - 16)); > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Paolo Bonzini <pbonzini@redhat.com> analyzed the Brotli source in detail, and concluded that the warning is a false positive: > This seems safe to me, because it's preceded by: > > uint8_t* copy_dst = &s->ringbuffer[pos]; > uint8_t* copy_src = &s->ringbuffer[src_start]; > int dst_end = pos + i; > int src_end = src_start + i; > if (src_end > pos && dst_end > src_start) { > /* Regions intersect. */ > goto CommandPostWrapCopy; > } > > If [src_start, src_start + i) and [pos, pos + i) don't intersect, then > neither do [src_start + 16, src_start + i) and [pos + 16, pos + i). > > The if seems okay: > > (src_start + i > pos && pos + i > src_start) > > which can be rewritten to: > > (pos < src_start + i && src_start < pos + i) > > Then the numbers are in one of these two orders: > > pos <= src_start < pos + i <= src_start + i > src_start <= pos < src_start + i <= pos + i > > These two would be allowed by the "if", but they can only happen if pos > == src_start so they degenerate to the same two orders above: > > pos <= src_start < src_start + i <= pos + i > src_start <= pos < pos + i <= src_start + i > > So it is a false positive in GCC. Disable the warning for now. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Cole Robinson <crobinso@redhat.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Yonghong Zhu <yonghong.zhu@intel.com> Reported-by: Cole Robinson <crobinso@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Liming Gao <liming.gao@intel.com> |
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|---|---|---|
| AppPkg | ||
| ArmPkg | ||
| ArmPlatformPkg | ||
| ArmVirtPkg | ||
| BaseTools | ||
| BeagleBoardPkg | ||
| Conf | ||
| CorebootModulePkg | ||
| CorebootPayloadPkg | ||
| CryptoPkg | ||
| DuetPkg | ||
| EdkCompatibilityPkg | ||
| EdkShellBinPkg | ||
| EdkShellPkg | ||
| EmbeddedPkg | ||
| EmulatorPkg | ||
| FatBinPkg | ||
| FatPkg | ||
| IntelFrameworkModulePkg | ||
| IntelFrameworkPkg | ||
| IntelFsp2Pkg | ||
| IntelFsp2WrapperPkg | ||
| IntelFspPkg | ||
| IntelFspWrapperPkg | ||
| IntelSiliconPkg | ||
| MdeModulePkg | ||
| MdePkg | ||
| NetworkPkg | ||
| Nt32Pkg | ||
| Omap35xxPkg | ||
| OptionRomPkg | ||
| OvmfPkg | ||
| PcAtChipsetPkg | ||
| QuarkPlatformPkg | ||
| QuarkSocPkg | ||
| SecurityPkg | ||
| ShellBinPkg | ||
| ShellPkg | ||
| SignedCapsulePkg | ||
| SourceLevelDebugPkg | ||
| StdLib | ||
| StdLibPrivateInternalFiles | ||
| UefiCpuPkg | ||
| UnixPkg | ||
| Vlv2DeviceRefCodePkg | ||
| Vlv2TbltDevicePkg | ||
| .gitignore | ||
| .gitmodules | ||
| BuildNotes2.txt | ||
| Contributions.txt | ||
| License.txt | ||
| Maintainers.txt | ||
| Readme.md | ||
| edksetup.bat | ||
| edksetup.sh | ||
Readme.md
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.