| // Copyright 2016 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <efi.h> |
| #include <efilib.h> |
| #include <utils.h> |
| #include <stdio.h> |
| |
| void* LoadFile(CHAR16* filename, UINTN* _sz) { |
| EFI_LOADED_IMAGE* loaded; |
| EFI_STATUS r; |
| void* data = NULL; |
| UINTN pages = 0; |
| |
| r = OpenProtocol(gImg, &LoadedImageProtocol, (void**)&loaded); |
| if (r) { |
| printf("LoadFile: Cannot open LoadedImageProtocol (%s)\n", efi_strerror(r)); |
| goto exit0; |
| } |
| |
| #if 0 |
| printf("Img DeviceHandle='%s'\n", HandleToString(loaded->DeviceHandle)); |
| printf("Img FilePath='%s'\n", DevicePathToStr(loaded->FilePath)); |
| printf("Img Base=%lx Size=%lx\n", loaded->ImageBase, loaded->ImageSize); |
| #endif |
| |
| EFI_FILE_IO_INTERFACE* fioi; |
| r = OpenProtocol(loaded->DeviceHandle, &SimpleFileSystemProtocol, (void**)&fioi); |
| if (r) { |
| printf("LoadFile: Cannot open SimpleFileSystemProtocol (%s)\n", efi_strerror(r)); |
| goto exit1; |
| } |
| |
| EFI_FILE_HANDLE root; |
| r = fioi->OpenVolume(fioi, &root); |
| if (r) { |
| printf("LoadFile: Cannot open root volume (%s)\n", efi_strerror(r)); |
| goto exit2; |
| } |
| |
| EFI_FILE_HANDLE file; |
| r = root->Open(root, &file, filename, EFI_FILE_MODE_READ, 0); |
| if (r) { |
| printf("LoadFile: Cannot open file (%s)\n", efi_strerror(r)); |
| goto exit3; |
| } |
| |
| char buf[512]; |
| UINTN sz = sizeof(buf); |
| EFI_FILE_INFO* finfo = (void*)buf; |
| r = file->GetInfo(file, &FileInfoGUID, &sz, finfo); |
| if (r) { |
| printf("LoadFile: Cannot get FileInfo (%s)\n", efi_strerror(r)); |
| goto exit3; |
| } |
| |
| pages = (finfo->FileSize + 4095) / 4096; |
| r = gBS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages, (EFI_PHYSICAL_ADDRESS *)&data); |
| if (r) { |
| printf("LoadFile: Cannot allocate buffer (%s)\n", efi_strerror(r)); |
| data = NULL; |
| goto exit4; |
| } |
| |
| sz = finfo->FileSize; |
| r = file->Read(file, &sz, data); |
| if (r) { |
| printf("LoadFile: Error reading file (%s)\n", efi_strerror(r)); |
| gBS->FreePool(data); |
| data = NULL; |
| goto exit4; |
| } |
| if (sz != finfo->FileSize) { |
| printf("LoadFile: Short read\n"); |
| gBS->FreePool(data); |
| data = NULL; |
| goto exit4; |
| } |
| *_sz = finfo->FileSize; |
| exit4: |
| file->Close(file); |
| exit3: |
| root->Close(root); |
| exit2: |
| CloseProtocol(loaded->DeviceHandle, &SimpleFileSystemProtocol); |
| exit1: |
| CloseProtocol(gImg, &LoadedImageProtocol); |
| exit0: |
| return data; |
| } |