#x86
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Why the x86 instruction is called ud2 and not just ud
Microsoft's Raymond Chen unpacks where the “two” in the name of the x86 instruction that's guaranteed to raise an invalid-opcode exception came from.
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A Mysterious x86 Processor Has Implemented APX and x86S, Abandoned by Intel
An unnamed company with no ties to either Intel or AMD has implemented a suite of the newest extensions in its x86 processor — including x86S, work on which Intel discontinued back in 2024.
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Executable Emoji: an x86 Program Made Entirely of Smileys
The author of the retro blog MartyPC discovered that the UTF-8 bytes of most emoji add up to valid 8088 machine code — and wrote a program in “emoji assembly” that prints “HELLO.”
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Rosenbridge: a Hardware Backdoor in Some x86 Processors
Security researcher Christopher Domas has discovered a hidden, undocumented core in VIA C3 processors that lets user-space code access the operating system's kernel memory, bypassing every hardware protection.
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LLVM Gains an x86 Target for the Lightweight Fault Isolation Sandbox
The LLVM developers have merged x86/x86_64 support into the main codebase for Lightweight Fault Isolation (LFI), a technology that isolates code within a single process. An LFI implementation for the AArch64 architecture had previously been added to the project.