I got a super nice project, and for that I needed to learn how the SMM really works. Again I started dipping my toes in this ocean of knowledge and I hope I don’t get too excited and drown myself before even getting started 😉 For the people who are not sure if they want to read all this: In SMM, it is possible to modify SMM saved execution context. SMM also sets its own IDT, it is initialized by the BIOS (DXE) and tons of cool stuff. Normally, CS base address is system-management RAM (SMRAM) base address and SMM code is copied to SMRAM in UEFI initialization and SMRAM is locked right after for security reasons. […]

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