This data structure is used by the Zig language code generation and therefore must be kept in sync with the compiler implementation.
gp_offset: c_uintfp_offset: c_uintoverflow_arg_area: *anyopaquereg_save_area: *anyopaquepub const VaListX86_64 = extern struct {
gp_offset: c_uint,
fp_offset: c_uint,
overflow_arg_area: *anyopaque,
reg_save_area: *anyopaque,
}