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https://github.com/jart/cosmopolitan.git
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f4f4caab0e
I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
65 lines
2 KiB
C
65 lines
2 KiB
C
#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_VENDOR_H_
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#define COSMOPOLITAN_LIBC_NEXGEN32E_VENDOR_H_
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#include "libc/nexgen32e/kcpuids.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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/*
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* Known 80x86 Vendors (CPUID.0 EBX+EDX+ECX)
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*
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* ╤ ╤
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* GenuineIntel
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* AuthenticAMD
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* GenuineCosmo
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* NexGenDriven
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* AMDisbetter!
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* CentaurHauls
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* TransmetaCPU
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* GenuineTMx86
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* CyrixInstead
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* UMC UMC UMC
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* SiS SiS SiS
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* Geode by NSC
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* RiseRiseRise
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* Vortex86 SoC
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* VIA VIA VIA
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* VMwareVMware
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* XenVMMXenVMM
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* Microsoft Hv
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* └────┐ │
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* G ⊕ t = 0x33 Intel
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* A ⊕ A = 0x00 AMD
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* G ⊕ s = 0x34 Cosmopolitan
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* N ⊕ v = 0x38 NexGen (Modern x86)
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* A ⊕ e = 0x24 AMD (Rank & File)
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* C ⊕ u = 0x36 Via (DBA Centaur)
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* T ⊕ C = 0x17 Transmeta (Historical)
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* G ⊕ x = 0x3f Transmeta (Historical)
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* C ⊕ e = 0x26 Cyrix (Historical)
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* U ⊕ M = 0x18 UMC (Taiwan)
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* S ⊕ i = 0x3a SiS (Historical)
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* G ⊕ N = 0x09 National Semiconductors (OLPC)
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* R ⊕ i = 0x3b Rise Technology (Historical)
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* V ⊕ S = 0x05 DM&P (Vortex86)
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* V ⊕ I = 0x1f Via
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* V ⊕ a = 0x37 VMware
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* X ⊕ V = 0x0e Xen
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* M ⊕ = 0x6d Microsoft (Win10 Hyper-V)
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* │ │
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* │ │ perfect
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* │ │ (𝑠)=𝑠₀⊕𝑠₉
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* ╧ ╧
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*
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* @note Parallels Desktop CPU brand string is " lrpepyh vr " since even
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* folks designing microprocessor emulators apparently struggle w/
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* endianness lool.
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*/
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#define IsAuthenticAMD() (_KCPUIDS_VENDOR() == 0x00)
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#define IsGenuineIntel() (_KCPUIDS_VENDOR() == 0x33)
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#define IsGenuineCosmo() (_KCPUIDS_VENDOR() == 0x34)
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#define _KCPUIDS_VENDOR() \
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(((kCpuids[KCPUIDS_0H][KCPUIDS_EBX] >> 000) & 0xff) ^ \
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((kCpuids[KCPUIDS_0H][KCPUIDS_EDX] >> 010) & 0xff))
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_VENDOR_H_ */
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