ddidderr/zstd-rs
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x86-64: Hide internal assembly functions

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Hide x86-64 internal assembly functions. Before

$ nm -D lib/libzstd.so.1 | grep usingDTable_internal_bmi2_asm_loop
00000000000c23c0 T _HUF_decompress4X1_usingDTable_internal_bmi2_asm_loop
00000000000c23c0 T HUF_decompress4X1_usingDTable_internal_bmi2_asm_loop
00000000000c283d T _HUF_decompress4X2_usingDTable_internal_bmi2_asm_loop
00000000000c283d T HUF_decompress4X2_usingDTable_internal_bmi2_asm_loop
$

After

$ nm -D lib/libzstd.so.1 | grep usingDTable_internal_bmi2_asm_loop
$

This fixes issue #2990.
This commit is contained in:
H.J. Lu
2022-01-11 10:12:24 -08:00
parent 5f2c3d9720
commit 568c69a4eb
3 changed files with 12 additions and 2 deletions
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lib/common/portability_macros.h
+6
View File
@@ -65,6 +65,12 @@
# endif
#endif
/* Mark the internal assembly functions as hidden */
#ifdef __ELF__
# define ZSTD_HIDE_ASM_FUNCTION(func) .hidden func
#else
# define ZSTD_HIDE_ASM_FUNCTION(func)
#endif
/* Enable runtime BMI2 dispatch based on the CPU.
* Enabled for clang & gcc >=4.8 on x86 when BMI2 isn't enabled by default.