Struct Context 

pub struct Context {
    pub segments: [u64; 4],
    pub fxsave: [u8; 512],
    pub gprs: [u64; 15],
    /* private fields */
}

Saved CPU context pushed onto the stack by exception entry code.

This structure contains all the saved CPU state needed to resume execution after handling an exception. It includes segment registers, floating-point state, and general-purpose registers.

Fields

segments: [u64; 4]

Segment registers in order: GS, FS, ES, DS.

fxsave: [u8; 512]

FPU/SSE state saved via FXSAVE instruction (512 bytes).

gprs: [u64; 15]

General-purpose registers (RAX through R15, excluding RSP).

The stack pointer (RSP) is not included here since it’s saved by the processor in the ExceptionInfo structure. R15 is at index 0, RAX is at index 14.