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Differential D23499 Diff 67770 sys/amd64/amd64/machdep.c

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sys/amd64/amd64/machdep.c

Show First 20 Lines • Show All 2,735 Lines • ▼ Show 20 Linesvoid *memmove_std(void * _Nonnull dst, const void * _Nonnull src,
size_t len); size_t len);
void *memmove_erms(void * _Nonnull dst, const void * _Nonnull src, void *memmove_erms(void * _Nonnull dst, const void * _Nonnull src,
size_t len); size_t len);
void *memcpy_std(void * _Nonnull dst, const void * _Nonnull src, void *memcpy_std(void * _Nonnull dst, const void * _Nonnull src,
size_t len); size_t len);
void *memcpy_erms(void * _Nonnull dst, const void * _Nonnull src, void *memcpy_erms(void * _Nonnull dst, const void * _Nonnull src,
size_t len); size_t len);
#ifdef KCSAN
/* /*
* These fail to build as ifuncs when used with KCSAN. * These fail to build as ifuncs when used with KCSAN.
* AUTO_VAR_INIT calls memset before the ifunc resolver is called.
*/ */
#if defined(KCSAN) || defined(AUTO_VAR_INIT)
void * void *
memset(void *buf, int c, size_t len) memset(void *buf, int c, size_t len)
{ {
return (memset_std(buf, c, len)); return (memset_std(buf, c, len));
} }
#else
DEFINE_IFUNC(, void *, memset, (void *, int, size_t))
{
return ((cpu_stdext_feature & CPUID_STDEXT_ERMS) != 0 ?
memset_erms : memset_std);
}
#endif
#if defined(KCSAN)
void * void *
memmove(void * _Nonnull dst, const void * _Nonnull src, size_t len) memmove(void * _Nonnull dst, const void * _Nonnull src, size_t len)
{ {
return (memmove_std(dst, src, len)); return (memmove_std(dst, src, len));
} }
void * void *
memcpy(void * _Nonnull dst, const void * _Nonnull src, size_t len) memcpy(void * _Nonnull dst, const void * _Nonnull src, size_t len)
{ {
return (memcpy_std(dst, src, len)); return (memcpy_std(dst, src, len));
} }
#else #else
DEFINE_IFUNC(, void *, memset, (void *, int, size_t))
{
return ((cpu_stdext_feature & CPUID_STDEXT_ERMS) != 0 ?
memset_erms : memset_std);
}
DEFINE_IFUNC(, void *, memmove, (void * _Nonnull, const void * _Nonnull, DEFINE_IFUNC(, void *, memmove, (void * _Nonnull, const void * _Nonnull,
size_t)) size_t))
{ {
return ((cpu_stdext_feature & CPUID_STDEXT_ERMS) != 0 ? return ((cpu_stdext_feature & CPUID_STDEXT_ERMS) != 0 ?
memmove_erms : memmove_std); memmove_erms : memmove_std);
} }
Show All 16 Lines