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//! GDT Table Type
const Entry = @import("entry.zig").Entry;
const TssDescriptor = @import("tss_descriptor.zig").TssDescriptor;
const Gdtr = @import("gdtr.zig").Gdtr;
pub const Table = extern struct {
null: Entry,
kernel_code: Entry,
kernel_data: Entry,
user_code: Entry,
user_data: Entry,
tss: TssDescriptor,
pub fn get_gdtr(self: *Table) Gdtr {
const base = @intFromPtr(self);
const size = @sizeOf(Table);
return Gdtr{
.limit = size - 1,
.base = base,
};
}
pub fn get_entry(self: *Table, index: u16) ?*Entry {
const entries: [*]Entry = @ptrCast(self);
const max_entries = @sizeOf(Table) / @sizeOf(Entry);
if (index >= max_entries) {
return null;
}
return &entries[index];
}
pub fn get_tss_descriptor(self: *Table) *TssDescriptor {
return &self.tss;
}
};
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