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Prevent use of linux-x64 binaries with v1 microarchitecture

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Lovell Fuller
2025-03-19 17:24:46 +00:00
parent d419aba76d
commit 3fd818c4b5
5 changed files with 31 additions and 2 deletions
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1
src/sharp.cc
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@@ -33,6 +33,7 @@ Napi::Object init(Napi::Env env, Napi::Object exports) {
exports.Set("block", Napi::Function::New(env, block));
exports.Set("_maxColourDistance", Napi::Function::New(env, _maxColourDistance));
exports.Set("_isUsingJemalloc", Napi::Function::New(env, _isUsingJemalloc));
exports.Set("_isUsingX64V2", Napi::Function::New(env, _isUsingX64V2));
exports.Set("stats", Napi::Function::New(env, stats));
return exports;
}

17
src/utilities.cc
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@@ -267,3 +267,20 @@ Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info) {
return Napi::Boolean::New(env, false);
}
#endif
#if defined(__GNUC__) && defined(__x86_64__)
// Are SSE 4.2 intrinsics available at runtime?
Napi::Value _isUsingX64V2(const Napi::CallbackInfo& info) {
Napi::Env env = info.Env();
unsigned int eax, ebx, ecx, edx;
__asm__ __volatile__("cpuid"
: "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
: "a"(1));
return Napi::Boolean::New(env, (ecx & 1U << 20) != 0);
}
#else
Napi::Value _isUsingX64V2(const Napi::CallbackInfo& info) {
Napi::Env env = info.Env();
return Napi::Boolean::New(env, false);
}
#endif

1
src/utilities.h
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@@ -15,5 +15,6 @@ Napi::Value format(const Napi::CallbackInfo& info);
void block(const Napi::CallbackInfo& info);
Napi::Value _maxColourDistance(const Napi::CallbackInfo& info);
Napi::Value _isUsingJemalloc(const Napi::CallbackInfo& info);
Napi::Value _isUsingX64V2(const Napi::CallbackInfo& info);
#endif // SRC_UTILITIES_H_