Assembly Intel x86¶
- CDQE: RAX ← sign-extend of EAX.
- MOVSXD rcx,ecx: Move doubleword to quadword with sign-extension.
- MOVABS rcx, <imm64>: to load arbitrary 64-bit constant into register and to load/store integer register from/to arbitrary constant 64-bit address is available.
- ENDBR64: “End Branch 64 bit”, Terminate Indirect Branch in 64 bit. Related to Control flow Enforcement Technology (CET) hardening (-fcf-protection=branch option of GCC). Executed as NOP if the CPU doesn’t support CET.
|64b register||Lower 32b||Lower 16b||Lower 8b|