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すごいBareflank楽しく学ぼう!
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morimolymoly
November 11, 2018
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すごいBareflank楽しく学ぼう!
ゆるふわ入門編
morimolymoly
November 11, 2018
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Transcript
͍͢͝Bareflankָ͠ ֶ͘΅͏ʂ @Dentoo.LT #21 @morimolymoly
͜Μʹͪ
ࢲ morimolymoly a.k.a. ήΩΧϫͶ͜ΈΈϝΠυ řŐŕŲƄ:morimolymoly.com আ ීஈͬͯΔ͜ͱ • ใηΩϡϦςΟ •
Hypervisor • Twitter • ΞΠΧπ@10߸ؗΞΠΧπࢹௌεϖʔε ࣮MMA෦һͳΜͰ͢Ͷʙʙʙʙ
আ
ͯ͞ɼ
͘͡ • Hypervisorͱʁ • Bareflankͬͯͳʹ • Ͱ͖Δ͜ͱ • ͭΒ͍͜ͱ •
ৄղ Bareflank’s ϏϧυγεςϜ(͕࣌ؒ͋Ε -> ͳͦ͞ ͏ͳͷͰϒϩάͰॻ͘)
ΏΔ;Θʹೖ͍ͯ͠ ͖·͢
Let’s get started!
Hypervisorͱ ԾϚγϯΛཧ͢ΔͨΊͷγεςϜ Type1 - Baremetal Type2 - Host ϋʔυΣΞ Hypervisor
VM VM VM ϋʔυΣΞ Hypervisor VM VM VM ήετOS • Xen • KVM • Hyper-V • Bitvisor • VirtualBox • Qemu • Bochs
Is Կ •Hypervisor։ൃϑϨʔϜϫʔΫ •Type-1,2͕ͭ͘ΕΔʂ •LinuxɼWIndowsɼUEFIʹରԠ •x86-64ରԠ •ถۭ܉ݚڀॴൃͷελʔτΞοϓ͕։ൃ •ϕΞϝλϧͳͷʹC++Ͱ͔͚Δʂ •ͱͱͷ࣮͕͘͢͝ബ͍(࣮͕Ѳ͍͢͠) •։ൃָ͕ʂ(։ൃָ͕ͱݴ͍ͬͯͳ͍)
ͦ͢͝͏(খฒײ)
͏Ε͍͜͠ͱ • ࣮͕ബ͍ͷͰίʔυϦʔσΟϯάָ • ԾԽؔͷߏମ͕·ͱ·ͬͯͯΑ͖ • ϏϧυγεςϜ͕CMakeͰ·Ε͍ͯͯΏΔ;Θ • ϞμϯͳC++Ͱॻ͚Δͷ͏Ε͍͠ͱࢥ͏ •
STL͕͔ͭ͑Δ • gitterͰ࣭͢Δͱ։ൃऀ͕͘͞͠ڭ͑ͯ͘ΕΔ •
ͭΒ͍͜ͱ • ബ͍ϑϨʔϜϫʔΫ -> ࣗͰ༻ҙ͠Ζ • υΩϡϝϯτ͕ແ(͋Δ͚Ͳݹ͍) -> ςετίʔυ͋Δ͍͍͠? ->
ίϯτϦϏϡʔγϣϯͷ νϟϯε? ଞͷHypervisor(Xen, Bitvisor)ͷιʔεͱIntel SDMΛಡΊʂ͆
Αͦ͞͏จݙ • ʰϋΠύʔόΠβͷ࡞Γํʱhttp://syuu1228.github.io/howto_implement_hypervisor/ • ʰHypervisor From Scratchʱhttps://rayanfam.com/topics/hypervisor-from-scratch- part-1/ • Intel
SDM • Bitvisorͷιʔε - thin hypervisorͷྲّྀ͕Θ͔Δ(PassThrough Driverͱ͔) Γ͍ͨ͜ͱʹΑͬͯಡΉจݙ͋Γ͑Μଟ͘ͳΔ
۩ମతͳ֦ுํ๏ʁ • vcpuΫϥε(VMͷίΞ෦)Λܧঝͨ͠ΫϥεΛ࡞͢Δ͚ͩ
;Μ͍͖
ྫ ࢀߟ: http://github.com/Tr4pMafia • syscall -MSR-IA32-LSTARͷվ͟ΜʹΑΔsyscall໋ྩͷtrap • Int3 - INT3ͷtrap
• starter_kit - γϯϓϧͳ֦ு ࠓύεεϧʔυϥΠόͷ࣮ͱ͔Λ;͘Ή͍͍ײ͡ͷHypervisorΛ։ൃ͍ͯ͠Δ
͓ΘΓ