Mark Huffman Decoder Assembly noexecstack on All Architectures#2964
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felixhandte merged 6 commits intofacebook:devfrom Jan 5, 2022
Merged
Mark Huffman Decoder Assembly noexecstack on All Architectures#2964felixhandte merged 6 commits intofacebook:devfrom
noexecstack on All Architectures#2964felixhandte merged 6 commits intofacebook:devfrom
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Apparently, even when the assembly file is empty (because `ZSTD_ENABLE_ASM_X86_64_BMI2` is false), it still is marked as possibly needing an executable stack and so the whole library is marked as such. This commit applies a simple patch for this problem by moving the noexecstack indication outside the macro guard. This commit builds on facebook#2857. This commit addresses facebook#2963.
Cyan4973
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terrelln
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Hopefully this marks the binary artifacts `noexecstack` even on platforms where binaries default to true.
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Previously we did this only on Linux, which missed other Unices.
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Apparently, even when the assembly file is empty (because
ZSTD_ENABLE_ASM_X86_64_BMI2is false), it still is marked as possibly needing an executable stack and so the whole library is marked as such. This commit applies a simple patch for this problem by moving the noexecstack indication outside the macro guard.In addition, this PR ships flags to the Makefile-driven builds to explicitly request a non-executable stack. This ought to be redundant, but it appears on at least one platform (MIPS) to succeed where the source code note fails.
This PR builds on #2857.
This PR addresses #2963.