native/cpu/x86: Add support for CPUID EAX=80000000h #1811
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ekilmer
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Oct 6, 2020
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Awesome. I don't have merge perms, so I'll leave that to you or whoever else feels like it 😉 |
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* master: native/cpu/x86: Add support for CPUID EAX=80000000h (#1811)
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* master: (43 commits) Syscall specific hooks (#2389) TUI Support Infrastructure (#1620) Fix coveralls upload (#2387) docs: fix simple typo, straigth -> straight (#2381) Attempt to allow symbolic balances from the start (#1818) Fix state.cpu.PC member (#1825) Bump black and mypy (#1824) Manticore 0.3.5 (#1808) Fix yices timeout argument (#1817) Detect default solver (#1820) Ignore Gas Calculations by Default (#1816) native/cpu/x86: Add support for CPUID EAX=80000000h (#1811) Change types.FunctionType=<class 'function'> (#1803) Fix test regressions (#1804) State Introspection API (#1775) Fix EVM account existence checks for selfdestruct and call (#1801) Add partial implementation of sendto syscall (#1791) crytic-compile: use latest release (#1795) Update gas metering for calls to empty accounts (#1774) Fix BitVec with symbolic offset and fix TranslatorSmtlib.unique thread safety (#1792) ...
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cpuidwithEAX=80000000his meant to return the highest "extended function" ID back viaEAX.Both Intel's and AMD's docs are a little oblique when it comes to what exactly an "extended function" ID is, but it seems to just be another
EAXvalue (i.e.,CPUID"leaf") with the high bit (i.e.EAX=8xxxxxxxh) set.Longer term, we should probably support some of these higher extended functions/leaves. In particular, it looks like recent versions of the Linux VDSO check for
CPUID EAX=80000001hand then check ifEDX.RDTSCP[bit 27]is high in order to userdtscp(in lieu ofrdtsc+ a serializing hack?).