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| author | H.J. Lu <hjl.tools@gmail.com> | 2020-12-23 06:49:04 -0800 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2022-07-12 18:30:56 +0300 |
| commit | c01e29a933baba737217a3549eaaced7e499edf5 (patch) | |
| tree | e878a5fd449ae72bd12447c5f0741607a5187936 | |
| parent | Update THANKS. (diff) | |
| download | xz-c01e29a933baba737217a3549eaaced7e499edf5.tar.xz | |
liblzma: Enable Intel CET in x86 CRC assembly codes
When Intel CET is enabled, we need to include <cet.h> in assembly codes
to mark Intel CET support and add _CET_ENDBR to indirect jump targets.
Tested on Intel Tiger Lake under CET enabled Linux.
| -rw-r--r-- | src/liblzma/check/crc32_x86.S | 9 | ||||
| -rw-r--r-- | src/liblzma/check/crc64_x86.S | 9 |
2 files changed, 18 insertions, 0 deletions
diff --git a/src/liblzma/check/crc32_x86.S b/src/liblzma/check/crc32_x86.S index 632c7b37..7814beca 100644 --- a/src/liblzma/check/crc32_x86.S +++ b/src/liblzma/check/crc32_x86.S @@ -51,6 +51,14 @@ init_table(void) * extern uint32_t lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc); */ +/* When Intel CET is enabled, include <cet.h> in assembly code to mark + Intel CET support. */ +#ifdef __CET__ +# include <cet.h> +#else +# define _CET_ENDBR +#endif + /* * On some systems, the functions need to be prefixed. The prefix is * usually an underscore. @@ -83,6 +91,7 @@ init_table(void) ALIGN(4, 16) LZMA_CRC32: + _CET_ENDBR /* * Register usage: * %eax crc diff --git a/src/liblzma/check/crc64_x86.S b/src/liblzma/check/crc64_x86.S index f5bb84b9..7ee08f64 100644 --- a/src/liblzma/check/crc64_x86.S +++ b/src/liblzma/check/crc64_x86.S @@ -41,6 +41,14 @@ init_table(void) * extern uint64_t lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc); */ +/* When Intel CET is enabled, include <cet.h> in assembly code to mark + Intel CET support. */ +#ifdef __CET__ +# include <cet.h> +#else +# define _CET_ENDBR +#endif + /* * On some systems, the functions need to be prefixed. The prefix is * usually an underscore. @@ -73,6 +81,7 @@ init_table(void) ALIGN(4, 16) LZMA_CRC64: + _CET_ENDBR /* * Register usage: * %eax crc LSB |