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
13EFIAPI 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