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| #include <Guid/FileInfo.h>
#include <Library/BaseMemoryLib.h>
#include <Library/CacheMaintenanceLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Protocol/SimpleFileSystem.h>
EFI_STATUS
ReadFileByName(IN CHAR16 *FileName, OUT UINT8 **FileData, OUT UINTN *FileSize) {
EFI_FILE_INFO *FileInfo;
UINTN FileInfoSize;
EFI_FILE_PROTOCOL *FileHandle = NULL;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFileSystem;
EFI_FILE_PROTOCOL *Root;
EFI_STATUS Status;
UINTN HandleCount = 0;
UINTN HandleIndex = 0;
EFI_HANDLE *HandleBuffer = NULL;
Status =
gBS->LocateHandleBuffer(ByProtocol, &gEfiSimpleFileSystemProtocolGuid,
NULL, &HandleCount, &HandleBuffer);
if (EFI_ERROR(Status) || HandleCount == 0) {
Print(L"Locate SimpleFileSystemProtocolHandle Buffer error");
return Status;
}
for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {
Status = gBS->OpenProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid,
(VOID **)&SimpleFileSystem, gImageHandle, NULL,
EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
if (EFI_ERROR(Status)) {
Print(L"Open SimpleFileSystemProtocol error,at HandleIndex %d",
HandleIndex);
continue;
}
Status = SimpleFileSystem->OpenVolume(SimpleFileSystem, &Root);
if (EFI_ERROR(Status)) {
Print(L"Open Root Volume error at HandleIndex%d", HandleIndex);
gBS->CloseProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL);
continue;
}
Status = Root->Open(Root, &FileHandle, FileName, EFI_FILE_MODE_READ, 0);
if ((FileHandle == NULL) || (EFI_ERROR(Status))) {
Print(L"Open file %s failed at HandleIndex%d\n", FileName, HandleIndex);
Root->Close(Root);
gBS->CloseProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL);
continue;
}
Print(L"FileHandle: 0x%p at HandleIndex%d\n", FileHandle, HandleIndex);
FileInfoSize = sizeof(EFI_FILE_INFO) + 1024;
FileInfo = AllocateZeroPool(FileInfoSize);
if (FileInfo == NULL) {
Print(L"can not allocate %d size for FineInfo at HandleIndex%d\n",
FileInfoSize, HandleIndex);
FileHandle->Close(FileHandle);
Root->Close(Root);
gBS->CloseProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL);
continue;
}
Status = FileHandle->GetInfo(FileHandle, &gEfiFileInfoGuid, &FileInfoSize,
FileInfo);
if (EFI_ERROR(Status)) {
Print(L"Get FileInfo failed at HandleIndex%d\n", HandleIndex);
FileHandle->Close(FileHandle);
Root->Close(Root);
gBS->CloseProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL);
continue;
}
Print(L"FileInfo: 0x%p\n", FileInfo);
*FileSize = (UINTN)FileInfo->FileSize + sizeof(CHAR16);
*FileData = AllocateZeroPool(*FileSize);
if (*FileData == NULL) {
Print(L"locate file data size %d failed at HandleIndex%d\n", *FileSize,
HandleIndex);
FileHandle->Close(FileHandle);
gBS->FreePool(FileInfo);
Root->Close(Root);
gBS->CloseProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL);
continue;
} else {
Print(L"size of %s is %d\n", FileName, *FileSize);
Print(L"FileData: 0x%p\n", *FileData);
}
Status = FileHandle->Read(FileHandle, FileSize, (VOID *)*FileData);
if (EFI_ERROR(Status)) {
Print(L"open %s file failed at HandleIndex%d\n", FileName, HandleIndex);
FileHandle->Close(FileHandle);
gBS->FreePool(FileInfo);
Root->Close(Root);
gBS->CloseProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL);
continue;
} else {
Print(L"open %s file success at HandleIndex%d\n", FileName, HandleIndex);
}
FileHandle->Close(FileHandle);
Print(L"FileHandle is freed normally at HandleIndex%d\n", HandleIndex);
gBS->FreePool(FileInfo);
Print(L"FileInfo is freed normally at HandleIndex%d\n", HandleIndex);
Root->Close(Root);
gBS->CloseProtocol(HandleBuffer[HandleIndex],
&gEfiSimpleFileSystemProtocolGuid, gImageHandle, NULL);
Print(L"Operation Success at HandleIndex%d\n", HandleIndex);
break;
}
if (HandleBuffer != NULL) {
gBS->FreePool(HandleBuffer);
}
return Status;
}
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