ArchFamily is the architecture family (AMD64, ARM, ...).

BigEndian reports whether the architecture is big-endian.

DefaultPhysPageSize is the default physical page size.

Int64Align is the required alignment for a 64-bit integer (4 on 32-bit systems, 8 on 64-bit).

MinFrameSize is the size of the system-reserved words at the bottom of a frame (just above the architectural stack pointer).

PCQuantum is the minimal unit for a program counter (1 on x86, 4 on most other systems).

PtrSize is the size of a pointer in bytes - unsafe.Sizeof(uintptr(0)) but as an ideal constant.

StackAlign is the required alignment of the SP register.