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x86-64: Enable Intel CET

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Intel Control-flow Enforcement Technology (CET):

https://en.wikipedia.org/wiki/Control-flow_integrity#Intel_Control-flow_Enforcement_Technology

requires that on Linux, all linker input files are marked as CET enabled
in .note.gnu.property section.  For high-level language source codes,
.note.gnu.property section is added by compiler with the -fcf-protection
option.  For assembly sources, include <cet.h> to add .note.gnu.property
section.
This commit is contained in:
H.J. Lu 2022-01-11 07:28:25 -08:00
parent e113c0ca49
commit 51ab182bd4
1 changed files with 11 additions and 0 deletions
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11
lib/common/portability_macros.h
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@ -134,4 +134,15 @@
# define ZSTD_ENABLE_ASM_X86_64_BMI2 0
#endif
/*
* For x86 ELF targets, add .note.gnu.property section for Intel CET in
* assembly sources when CET is enabled.
*/
#if defined(__ELF__) && (defined(__x86_64__) || defined(__i386__)) \
&& defined(__has_include)
# if __has_include(<cet.h>)
# include <cet.h>
# endif
#endif
#endif /* ZSTD_PORTABILITY_MACROS_H */