Module syscall

veridian_kernel::arch::x86_64

Module syscall

Expand description

x86_64 system call entry point and SYSCALL/SYSRET MSR configuration.

This module configures the CPU’s SYSCALL/SYSRET mechanism for user-kernel transitions. The key components are:

syscall_entry: naked assembly handler invoked by the SYSCALL instruction
PerCpuData: per-CPU storage for kernel/user RSP, accessed via GS segment
init_syscall: MSR configuration (EFER, STAR, LSTAR, SFMASK, KernelGsBase)

Structs§

PerCpuData: Per-CPU data accessed via GS segment register during syscall entry/exit.
SyscallFrame: Saved user register frame from SYSCALL entry.

Functions§

get_saved_user_rsp: Get the user RSP saved by syscall_entry into per-CPU data.
get_syscall_frame: Get a reference to the saved syscall register frame.
init_syscall: Initialize SYSCALL/SYSRET support.
per_cpu_data_ptr: Get a mutable pointer to the per-CPU data.
syscall_entry^⚠: x86_64 SYSCALL instruction entry point