PDF-Asamplered-pill.Anexampleofared-pill,abletodetectifaprogramisruninsideQEMU[3],isthebytesequence087ce304,correspondingtothex86as-semblyinstructionor%bh,0x04(%ebx)(ourarchi-tectureofreferenceisIA-32andweadopttheAT&Tassemblysyntax).Theinstructioncomputestheb
foratleastoneofthetwoCPUsandtointerprettheformatoftheinstructionsfoundWetreattheCPUasaoracleiftheCPUexecutesthesequenceofbytesweconsiderthestringasavalidinstructionSuchapproachallowsustodiscard
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