lumine

UEFI x86_64 bootloader for linux kernel images

settings

src/boot/Chainload.zig

864 bytes raw

 1const std = @import("std");
 2const uefi = std.os.uefi;
 3
 4const Path = @import("../Config.zig").Path;
 5const luefi = @import("../luefi.zig");
 6
 7const log = std.log.scoped(.chainload);
 8
 9const Chainload = @This();
10
11img_buffer: []align(4096) u8,
12img_pages: usize,
13
14pub fn load(path: Path) !Chainload {
15    const buffer, const pages = try luefi.pathReadAlloc(path);
16    errdefer luefi.freePages(buffer, pages);
17
18    return .{
19        .img_buffer = buffer,
20        .img_pages = pages,
21    };
22}
23
24pub fn deinit(self: Chainload) void {
25    luefi.freePages(self.img_buffer, self.img_pages);
26}
27
28pub fn start(self: Chainload) !uefi.Status {
29    const boot_svc = uefi.system_table.boot_services.?;
30
31    const handle, _ = try luefi.loadImage(self.img_buffer);
32    defer luefi.unloadImage(handle);
33
34    const exit_data = try boot_svc.startImage(handle);
35    return exit_data.code;
36}