1 // Copyright 2016 The Fuchsia Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <efi/system-table.h>
6 #include <efi/types.h>
7 #include <efi/protocol/loaded-image.h>
8 #include <efi/protocol/simple-file-system.h>
9
10 #include <stdio.h>
11 #include <xefi.h>
12
efi_main(efi_handle img,efi_system_table * sys)13 EFIAPI efi_status efi_main(efi_handle img, efi_system_table* sys) {
14 efi_loaded_image_protocol* loaded;
15 efi_status r;
16
17 xefi_init(img, sys);
18
19 printf("Hello, EFI World\n");
20
21 r = xefi_open_protocol(img, &LoadedImageProtocol, (void**)&loaded);
22 if (r)
23 xefi_fatal("LoadedImageProtocol", r);
24
25 printf("Img DeviceHandle='%ls'\n", xefi_handle_to_str(loaded->DeviceHandle));
26 printf("Img FilePath='%ls'\n", xefi_devpath_to_str(loaded->FilePath));
27 printf("Img Base=%p Size=%lx\n", loaded->ImageBase, loaded->ImageSize);
28
29 efi_simple_file_system_protocol* sfs;
30 r = xefi_open_protocol(loaded->DeviceHandle, &SimpleFileSystemProtocol, (void**)&sfs);
31 if (r)
32 xefi_fatal("SimpleFileSystemProtocol", r);
33
34 efi_file_protocol* root;
35 r = sfs->OpenVolume(sfs, &root);
36 if (r)
37 xefi_fatal("OpenVolume", r);
38
39 efi_file_protocol* file;
40 r = root->Open(root, &file, L"README.txt", EFI_FILE_MODE_READ, 0);
41
42 if (r == EFI_SUCCESS) {
43 char buf[512];
44 size_t sz = sizeof(buf);
45 efi_file_info* finfo = (void*)buf;
46 r = file->GetInfo(file, &FileInfoGuid, &sz, finfo);
47 if (r)
48 xefi_fatal("GetInfo", r);
49 printf("FileSize %ld\n", finfo->FileSize);
50
51 sz = sizeof(buf) - 1;
52 r = file->Read(file, &sz, buf);
53 if (r)
54 xefi_fatal("Read", r);
55
56 char* x = buf;
57 while (sz-- > 0)
58 printf("%c", *x++);
59
60 file->Close(file);
61 }
62
63 root->Close(root);
64 xefi_close_protocol(loaded->DeviceHandle, &SimpleFileSystemProtocol);
65 xefi_close_protocol(img, &LoadedImageProtocol);
66
67 xefi_wait_any_key();
68
69 return EFI_SUCCESS;
70 }
71