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liblzma: Use attribute no_profile_instrument_function with ifunc.

Thanks to Sam James for determining this was the attribute needed to
workaround the GCC bug and for his version of the patch in Gentoo.
master
Jia Tan 1 month ago
parent
commit
72d2933bfa
  1. 5
      src/liblzma/check/crc32_fast.c
  2. 3
      src/liblzma/check/crc64_fast.c

5
src/liblzma/check/crc32_fast.c

@ -135,6 +135,11 @@ typedef uint32_t (*crc32_func_type)(
// This resolver is shared between all three dispatch methods. It serves as
// the ifunc resolver if ifunc is supported, otherwise it is called as a
// regular function by the constructor or first call resolution methods.
// The __no_profile_instrument_function__ attribute support is checked when
// determining if ifunc can be used, so it is safe to use here.
#ifdef CRC_USE_IFUNC
__attribute__((__no_profile_instrument_function__))
#endif
static crc32_func_type
crc32_resolve(void)
{

3
src/liblzma/check/crc64_fast.c

@ -98,6 +98,9 @@ typedef uint64_t (*crc64_func_type)(
# pragma GCC diagnostic ignored "-Wunused-function"
#endif
#ifdef CRC_USE_IFUNC
__attribute__((__no_profile_instrument_function__))
#endif
static crc64_func_type
crc64_resolve(void)
{

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