diff options
Diffstat (limited to 'ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c')
| -rw-r--r-- | ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c | 1205 |
1 files changed, 0 insertions, 1205 deletions
diff --git a/ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c b/ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c deleted file mode 100644 index 6efdad9ebc..0000000000 --- a/ArmPkg/Filesystem/SemihostFs/Arm/SemihostFs.c +++ /dev/null @@ -1,1205 +0,0 @@ -/** @file
- Support a Semi Host file system over a debuggers JTAG
-
- Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
- Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
-
- This program and the accompanying materials
- are licensed and made available under the terms and conditions of the BSD License
- which accompanies this distribution. The full text of the license may be found at
- http://opensource.org/licenses/bsd-license.php
-
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-#include <Uefi.h>
-
-#include <Guid/FileInfo.h>
-#include <Guid/FileSystemInfo.h>
-#include <Guid/FileSystemVolumeLabelInfo.h>
-
-#include <Library/BaseLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/DebugLib.h>
-#include <Library/MemoryAllocationLib.h>
-#include <Library/SemihostLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-
-#include <Protocol/DevicePath.h>
-#include <Protocol/SimpleFileSystem.h>
-
-#include "SemihostFs.h"
-
-#define DEFAULT_SEMIHOST_FS_LABEL L"SemihostFs"
-
-STATIC CHAR16 *mSemihostFsLabel;
-
-EFI_SIMPLE_FILE_SYSTEM_PROTOCOL gSemihostFs = {
- EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,
- VolumeOpen
-};
-
-EFI_FILE gSemihostFsFile = {
- EFI_FILE_PROTOCOL_REVISION,
- FileOpen,
- FileClose,
- FileDelete,
- FileRead,
- FileWrite,
- FileGetPosition,
- FileSetPosition,
- FileGetInfo,
- FileSetInfo,
- FileFlush
-};
-
-//
-// Device path for semi-hosting. It contains our autogened Caller ID GUID.
-//
-typedef struct {
- VENDOR_DEVICE_PATH Guid;
- EFI_DEVICE_PATH_PROTOCOL End;
-} SEMIHOST_DEVICE_PATH;
-
-SEMIHOST_DEVICE_PATH gDevicePath = {
- {
- { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, { sizeof (VENDOR_DEVICE_PATH), 0 } },
- EFI_CALLER_ID_GUID
- },
- { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } }
-};
-
-typedef struct {
- LIST_ENTRY Link;
- UINT64 Signature;
- EFI_FILE File;
- CHAR8 *FileName;
- UINT64 OpenMode;
- UINT32 Position;
- UINTN SemihostHandle;
- BOOLEAN IsRoot;
- EFI_FILE_INFO Info;
-} SEMIHOST_FCB;
-
-#define SEMIHOST_FCB_SIGNATURE SIGNATURE_32( 'S', 'H', 'F', 'C' )
-#define SEMIHOST_FCB_FROM_THIS(a) CR(a, SEMIHOST_FCB, File, SEMIHOST_FCB_SIGNATURE)
-#define SEMIHOST_FCB_FROM_LINK(a) CR(a, SEMIHOST_FCB, Link, SEMIHOST_FCB_SIGNATURE);
-
-EFI_HANDLE gInstallHandle = NULL;
-LIST_ENTRY gFileList = INITIALIZE_LIST_HEAD_VARIABLE (gFileList);
-
-SEMIHOST_FCB *
-AllocateFCB (
- VOID
- )
-{
- SEMIHOST_FCB *Fcb = AllocateZeroPool (sizeof (SEMIHOST_FCB));
-
- if (Fcb != NULL) {
- CopyMem (&Fcb->File, &gSemihostFsFile, sizeof (gSemihostFsFile));
- Fcb->Signature = SEMIHOST_FCB_SIGNATURE;
- }
-
- return Fcb;
-}
-
-VOID
-FreeFCB (
- IN SEMIHOST_FCB *Fcb
- )
-{
- // Remove Fcb from gFileList.
- RemoveEntryList (&Fcb->Link);
-
- // To help debugging...
- Fcb->Signature = 0;
-
- FreePool (Fcb);
-}
-
-
-
-EFI_STATUS
-VolumeOpen (
- IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
- OUT EFI_FILE **Root
- )
-{
- SEMIHOST_FCB *RootFcb = NULL;
-
- if (Root == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- RootFcb = AllocateFCB ();
- if (RootFcb == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- RootFcb->IsRoot = TRUE;
- RootFcb->Info.Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;
-
- InsertTailList (&gFileList, &RootFcb->Link);
-
- *Root = &RootFcb->File;
-
- return EFI_SUCCESS;
-}
-
-/**
- Open a file on the host system by means of the semihosting interface.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is
- the file handle to source location.
- @param[out] NewHandle A pointer to the location to return the opened
- handle for the new file.
- @param[in] FileName The Null-terminated string of the name of the file
- to be opened.
- @param[in] OpenMode The mode to open the file : Read or Read/Write or
- Read/Write/Create
- @param[in] Attributes Only valid for EFI_FILE_MODE_CREATE, in which case these
- are the attribute bits for the newly created file. The
- mnemonics of the attribute bits are : EFI_FILE_READ_ONLY,
- EFI_FILE_HIDDEN, EFI_FILE_SYSTEM, EFI_FILE_RESERVED,
- EFI_FILE_DIRECTORY and EFI_FILE_ARCHIVE.
-
- @retval EFI_SUCCESS The file was open.
- @retval EFI_NOT_FOUND The specified file could not be found.
- @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.
- @retval EFI_WRITE_PROTECTED Attempt to create a directory. This is not possible
- with the semi-hosting interface.
- @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the file.
- @retval EFI_INVALID_PARAMETER At least one of the parameters is invalid.
-
-**/
-EFI_STATUS
-FileOpen (
- IN EFI_FILE *This,
- OUT EFI_FILE **NewHandle,
- IN CHAR16 *FileName,
- IN UINT64 OpenMode,
- IN UINT64 Attributes
- )
-{
- SEMIHOST_FCB *FileFcb;
- RETURN_STATUS Return;
- EFI_STATUS Status;
- UINTN SemihostHandle;
- CHAR8 *AsciiFileName;
- UINT32 SemihostMode;
- UINTN Length;
-
- if ((FileName == NULL) || (NewHandle == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- if ( (OpenMode != EFI_FILE_MODE_READ) &&
- (OpenMode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE)) &&
- (OpenMode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE)) ) {
- return EFI_INVALID_PARAMETER;
- }
-
- if ((OpenMode & EFI_FILE_MODE_CREATE) &&
- (Attributes & EFI_FILE_DIRECTORY) ) {
- return EFI_WRITE_PROTECTED;
- }
-
- AsciiFileName = AllocatePool (StrLen (FileName) + 1);
- if (AsciiFileName == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- UnicodeStrToAsciiStr (FileName, AsciiFileName);
-
- // Opening '/', '\', '.', or the NULL pathname is trying to open the root directory
- if ((AsciiStrCmp (AsciiFileName, "\\") == 0) ||
- (AsciiStrCmp (AsciiFileName, "/") == 0) ||
- (AsciiStrCmp (AsciiFileName, "") == 0) ||
- (AsciiStrCmp (AsciiFileName, ".") == 0) ) {
- FreePool (AsciiFileName);
- return (VolumeOpen (&gSemihostFs, NewHandle));
- }
-
- //
- // No control is done here concerning the file path. It is passed
- // as it is to the host operating system through the semi-hosting
- // interface. We first try to open the file in the read or update
- // mode even if the file creation has been asked for. That way, if
- // the file already exists, it is not truncated to zero length. In
- // write mode (bit SEMIHOST_FILE_MODE_WRITE up), if the file already
- // exists, it is reset to an empty file.
- //
- if (OpenMode == EFI_FILE_MODE_READ) {
- SemihostMode = SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY;
- } else {
- SemihostMode = SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY | SEMIHOST_FILE_MODE_UPDATE;
- }
- Return = SemihostFileOpen (AsciiFileName, SemihostMode, &SemihostHandle);
-
- if (RETURN_ERROR (Return)) {
- if (OpenMode & EFI_FILE_MODE_CREATE) {
- //
- // In the create if does not exist case, if the opening in update
- // mode failed, create it and open it in update mode. The update
- // mode allows for both read and write from and to the file.
- //
- Return = SemihostFileOpen (
- AsciiFileName,
- SEMIHOST_FILE_MODE_WRITE | SEMIHOST_FILE_MODE_BINARY | SEMIHOST_FILE_MODE_UPDATE,
- &SemihostHandle
- );
- if (RETURN_ERROR (Return)) {
- Status = EFI_DEVICE_ERROR;
- goto Error;
- }
- } else {
- Status = EFI_NOT_FOUND;
- goto Error;
- }
- }
-
- // Allocate a control block and fill it
- FileFcb = AllocateFCB ();
- if (FileFcb == NULL) {
- Status = EFI_OUT_OF_RESOURCES;
- goto Error;
- }
-
- FileFcb->FileName = AsciiFileName;
- FileFcb->SemihostHandle = SemihostHandle;
- FileFcb->Position = 0;
- FileFcb->IsRoot = 0;
- FileFcb->OpenMode = OpenMode;
-
- Return = SemihostFileLength (SemihostHandle, &Length);
- if (RETURN_ERROR (Return)) {
- Status = EFI_DEVICE_ERROR;
- FreeFCB (FileFcb);
- goto Error;
- }
-
- FileFcb->Info.FileSize = Length;
- FileFcb->Info.PhysicalSize = Length;
- FileFcb->Info.Attribute = (OpenMode & EFI_FILE_MODE_CREATE) ? Attributes : 0;
-
- InsertTailList (&gFileList, &FileFcb->Link);
-
- *NewHandle = &FileFcb->File;
-
- return EFI_SUCCESS;
-
-Error:
-
- FreePool (AsciiFileName);
-
- return Status;
-}
-
-/**
- Worker function that truncate a file specified by its name to a given size.
-
- @param[in] FileName The Null-terminated string of the name of the file to be opened.
- @param[in] Size The target size for the file.
-
- @retval EFI_SUCCESS The file was truncated.
- @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.
-
-**/
-STATIC
-EFI_STATUS
-TruncateFile (
- IN CHAR8 *FileName,
- IN UINTN Size
- )
-{
- EFI_STATUS Status;
- RETURN_STATUS Return;
- UINTN FileHandle;
- UINT8 *Buffer;
- UINTN Remaining;
- UINTN Read;
- UINTN ToRead;
-
- Status = EFI_DEVICE_ERROR;
- FileHandle = 0;
- Buffer = NULL;
-
- Return = SemihostFileOpen (
- FileName,
- SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY,
- &FileHandle
- );
- if (RETURN_ERROR (Return)) {
- goto Error;
- }
-
- Buffer = AllocatePool (Size);
- if (Buffer == NULL) {
- Status = EFI_OUT_OF_RESOURCES;
- goto Error;
- }
-
- Read = 0;
- Remaining = Size;
- while (Remaining > 0) {
- ToRead = Remaining;
- Return = SemihostFileRead (FileHandle, &ToRead, Buffer + Read);
- if (RETURN_ERROR (Return)) {
- goto Error;
- }
- Remaining -= ToRead;
- Read += ToRead;
- }
-
- Return = SemihostFileClose (FileHandle);
- FileHandle = 0;
- if (RETURN_ERROR (Return)) {
- goto Error;
- }
-
- Return = SemihostFileOpen (
- FileName,
- SEMIHOST_FILE_MODE_WRITE | SEMIHOST_FILE_MODE_BINARY,
- &FileHandle
- );
- if (RETURN_ERROR (Return)) {
- goto Error;
- }
-
- if (Size > 0) {
- Return = SemihostFileWrite (FileHandle, &Size, Buffer);
- if (RETURN_ERROR (Return)) {
- goto Error;
- }
- }
-
- Status = EFI_SUCCESS;
-
-Error:
-
- if (FileHandle != 0) {
- SemihostFileClose (FileHandle);
- }
- if (Buffer != NULL) {
- FreePool (Buffer);
- }
-
- return (Status);
-
-}
-
-/**
- Close a specified file handle.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the file
- handle to close.
-
- @retval EFI_SUCCESS The file was closed.
- @retval EFI_INVALID_PARAMETER The parameter "This" is NULL.
-
-**/
-EFI_STATUS
-FileClose (
- IN EFI_FILE *This
- )
-{
- SEMIHOST_FCB *Fcb;
-
- if (This == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS(This);
-
- if (!Fcb->IsRoot) {
- SemihostFileClose (Fcb->SemihostHandle);
- //
- // The file size might have been reduced from its actual
- // size on the host file system with FileSetInfo(). In
- // that case, the file has to be truncated.
- //
- if (Fcb->Info.FileSize < Fcb->Info.PhysicalSize) {
- TruncateFile (Fcb->FileName, Fcb->Info.FileSize);
- }
- FreePool (Fcb->FileName);
- }
-
- FreeFCB (Fcb);
-
- return EFI_SUCCESS;
-}
-
-/**
- Close and delete a file.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the file
- handle to delete.
-
- @retval EFI_SUCCESS The file was closed and deleted.
- @retval EFI_WARN_DELETE_FAILURE The handle was closed, but the file was not deleted.
- @retval EFI_INVALID_PARAMETER The parameter "This" is NULL.
-
-**/
-EFI_STATUS
-FileDelete (
- IN EFI_FILE *This
- )
-{
- SEMIHOST_FCB *Fcb;
- RETURN_STATUS Return;
- CHAR8 *FileName;
- UINTN NameSize;
-
- if (This == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS (This);
-
- if (!Fcb->IsRoot) {
- // Get the filename from the Fcb
- NameSize = AsciiStrLen (Fcb->FileName);
- FileName = AllocatePool (NameSize + 1);
-
- AsciiStrCpy (FileName, Fcb->FileName);
-
- // Close the file if it's open. Disregard return status,
- // since it might give an error if the file isn't open.
- This->Close (This);
-
- // Call the semihost interface to delete the file.
- Return = SemihostFileRemove (FileName);
- if (RETURN_ERROR (Return)) {
- return EFI_WARN_DELETE_FAILURE;
- }
- return EFI_SUCCESS;
- } else {
- return EFI_WARN_DELETE_FAILURE;
- }
-}
-
-/**
- Read data from an open file.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that
- is the file handle to read data from.
- @param[in out] BufferSize On input, the size of the Buffer. On output, the
- amount of data returned in Buffer. In both cases,
- the size is measured in bytes.
- @param[out] Buffer The buffer into which the data is read.
-
- @retval EFI_SUCCESS The data was read.
- @retval EFI_DEVICE_ERROR On entry, the current file position is
- beyond the end of the file, or the semi-hosting
- interface reported an error while performing the
- read operation.
- @retval EFI_INVALID_PARAMETER At least one of the three input pointers is NULL.
-
-**/
-EFI_STATUS
-FileRead (
- IN EFI_FILE *This,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer
- )
-{
- SEMIHOST_FCB *Fcb;
- EFI_STATUS Status;
- RETURN_STATUS Return;
-
- if ((This == NULL) || (BufferSize == NULL) || (Buffer == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS (This);
-
- if (Fcb->IsRoot) {
- // The semi-hosting interface does not allow to list files on the host machine.
- Status = EFI_UNSUPPORTED;
- } else {
- Status = EFI_SUCCESS;
- if (Fcb->Position >= Fcb->Info.FileSize) {
- *BufferSize = 0;
- if (Fcb->Position > Fcb->Info.FileSize) {
- Status = EFI_DEVICE_ERROR;
- }
- } else {
- Return = SemihostFileRead (Fcb->SemihostHandle, BufferSize, Buffer);
- if (RETURN_ERROR (Return)) {
- Status = EFI_DEVICE_ERROR;
- } else {
- Fcb->Position += *BufferSize;
- }
- }
- }
-
- return Status;
-}
-
-/**
- Worker function that extends the size of an open file.
-
- The extension is filled with zeros.
-
- @param[in] Fcb Internal description of the opened file
- @param[in] Size The number of bytes, the file has to be extended.
-
- @retval EFI_SUCCESS The file was extended.
- @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.
-
-**/
-STATIC
-EFI_STATUS
-ExtendFile (
- IN SEMIHOST_FCB *Fcb,
- IN UINTN Size
- )
-{
- RETURN_STATUS Return;
- UINTN Remaining;
- CHAR8 WriteBuffer[128];
- UINTN WriteNb;
- UINTN WriteSize;
-
- Return = SemihostFileSeek (Fcb->SemihostHandle, Fcb->Info.FileSize);
- if (RETURN_ERROR (Return)) {
- return EFI_DEVICE_ERROR;
- }
-
- Remaining = Size;
- SetMem (WriteBuffer, 0, sizeof(WriteBuffer));
- while (Remaining > 0) {
- WriteNb = MIN (Remaining, sizeof(WriteBuffer));
- WriteSize = WriteNb;
- Return = SemihostFileWrite (Fcb->SemihostHandle, &WriteSize, WriteBuffer);
- if (RETURN_ERROR (Return)) {
- return EFI_DEVICE_ERROR;
- }
- Remaining -= WriteNb;
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Write data to an open file.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that
- is the file handle to write data to.
- @param[in out] BufferSize On input, the size of the Buffer. On output, the
- size of the data actually written. In both cases,
- the size is measured in bytes.
- @param[in] Buffer The buffer of data to write.
-
- @retval EFI_SUCCESS The data was written.
- @retval EFI_ACCESS_DENIED Attempt to write into a read only file or
- in a file opened in read only mode.
- @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.
- @retval EFI_INVALID_PARAMETER At least one of the three input pointers is NULL.
-
-**/
-EFI_STATUS
-FileWrite (
- IN EFI_FILE *This,
- IN OUT UINTN *BufferSize,
- IN VOID *Buffer
- )
-{
- SEMIHOST_FCB *Fcb;
- EFI_STATUS Status;
- UINTN WriteSize;
- RETURN_STATUS Return;
- UINTN Length;
-
- if ((This == NULL) || (BufferSize == NULL) || (Buffer == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS (This);
-
- // We cannot write a read-only file
- if ((Fcb->Info.Attribute & EFI_FILE_READ_ONLY)
- || !(Fcb->OpenMode & EFI_FILE_MODE_WRITE)) {
- return EFI_ACCESS_DENIED;
- }
-
- //
- // If the position has been set past the end of the file, first grow the
- // file from its current size "Fcb->Info.FileSize" to "Fcb->Position"
- // size, filling the gap with zeros.
- //
- if (Fcb->Position > Fcb->Info.FileSize) {
- Status = ExtendFile (Fcb, Fcb->Position - Fcb->Info.FileSize);
- if (EFI_ERROR (Status)) {
- return Status;
- }
- Fcb->Info.FileSize = Fcb->Position;
- }
-
- WriteSize = *BufferSize;
- Return = SemihostFileWrite (Fcb->SemihostHandle, &WriteSize, Buffer);
- if (RETURN_ERROR (Return)) {
- return EFI_DEVICE_ERROR;
- }
-
- Fcb->Position += *BufferSize;
- if (Fcb->Position > Fcb->Info.FileSize) {
- Fcb->Info.FileSize = Fcb->Position;
- }
-
- Return = SemihostFileLength (Fcb->SemihostHandle, &Length);
- if (RETURN_ERROR (Return)) {
- return EFI_DEVICE_ERROR;
- }
- Fcb->Info.PhysicalSize = Length;
-
- return EFI_SUCCESS;
-}
-
-/**
- Return a file's current position.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is
- the file handle to get the current position on.
- @param[out] Position The address to return the file's current position value.
-
- @retval EFI_SUCCESS The position was returned.
- @retval EFI_INVALID_PARAMETER The parameter "This" or "Position" is NULL.
-
-**/
-EFI_STATUS
-FileGetPosition (
- IN EFI_FILE *This,
- OUT UINT64 *Position
- )
-{
- SEMIHOST_FCB *Fcb;
-
- if ((This == NULL) || (Position == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS(This);
-
- *Position = Fcb->Position;
-
- return EFI_SUCCESS;
-}
-
-/**
- Set a file's current position.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is
- the file handle to set the requested position on.
- @param[in] Position The byte position from the start of the file to set.
-
- @retval EFI_SUCCESS The position was set.
- @retval EFI_DEVICE_ERROR The semi-hosting positionning operation failed.
- @retval EFI_UNSUPPORTED The seek request for nonzero is not valid on open
- directories.
- @retval EFI_INVALID_PARAMETER The parameter "This" is NULL.
-
-**/
-EFI_STATUS
-FileSetPosition (
- IN EFI_FILE *This,
- IN UINT64 Position
- )
-{
- SEMIHOST_FCB *Fcb;
- RETURN_STATUS Return;
-
- if (This == NULL) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS (This);
-
- if (Fcb->IsRoot) {
- if (Position != 0) {
- return EFI_UNSUPPORTED;
- }
- }
- else {
- //
- // UEFI Spec section 12.5:
- // "Seeking to position 0xFFFFFFFFFFFFFFFF causes the current position to
- // be set to the end of the file."
- //
- if (Position == 0xFFFFFFFFFFFFFFFF) {
- Position = Fcb->Info.FileSize;
- }
- Return = SemihostFileSeek (Fcb->SemihostHandle, MIN (Position, Fcb->Info.FileSize));
- if (RETURN_ERROR (Return)) {
- return EFI_DEVICE_ERROR;
- }
- }
-
- Fcb->Position = Position;
-
- return EFI_SUCCESS;
-}
-
-/**
- Return information about a file.
-
- @param[in] Fcb A pointer to the description of an open file.
- @param[in out] BufferSize The size, in bytes, of Buffer.
- @param[out] Buffer A pointer to the data buffer to return. Not NULL if
- "*BufferSize" is greater than 0.
-
- @retval EFI_SUCCESS The information was returned.
- @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to return the information.
- BufferSize has been updated with the size needed to
- complete the request.
-**/
-STATIC
-EFI_STATUS
-GetFileInfo (
- IN SEMIHOST_FCB *Fcb,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer
- )
-{
- EFI_FILE_INFO *Info = NULL;
- UINTN NameSize = 0;
- UINTN ResultSize;
- UINTN Index;
-
- if (Fcb->IsRoot == TRUE) {
- ResultSize = SIZE_OF_EFI_FILE_INFO + sizeof(CHAR16);
- } else {
- NameSize = AsciiStrLen (Fcb->FileName) + 1;
- ResultSize = SIZE_OF_EFI_FILE_INFO + NameSize * sizeof (CHAR16);
- }
-
- if (*BufferSize < ResultSize) {
- *BufferSize = ResultSize;
- return EFI_BUFFER_TOO_SMALL;
- }
-
- Info = Buffer;
-
- // Copy the current file info
- CopyMem (Info, &Fcb->Info, SIZE_OF_EFI_FILE_INFO);
-
- // Fill in the structure
- Info->Size = ResultSize;
-
- if (Fcb->IsRoot == TRUE) {
- Info->FileName[0] = L'\0';
- } else {
- for (Index = 0; Index < NameSize; Index++) {
- Info->FileName[Index] = Fcb->FileName[Index];
- }
- }
-
- *BufferSize = ResultSize;
-
- return EFI_SUCCESS;
-}
-
-/**
- Return information about a file system.
-
- @param[in] Fcb A pointer to the description of an open file
- which belongs to the file system, the information
- is requested for.
- @param[in out] BufferSize The size, in bytes, of Buffer.
- @param[out] Buffer A pointer to the data buffer to return. Not NULL if
- "*BufferSize" is greater than 0.
-
- @retval EFI_SUCCESS The information was returned.
- @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to return the information.
- BufferSize has been updated with the size needed to
- complete the request.
-
-**/
-STATIC
-EFI_STATUS
-GetFilesystemInfo (
- IN SEMIHOST_FCB *Fcb,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer
- )
-{
- EFI_FILE_SYSTEM_INFO *Info;
- EFI_STATUS Status;
- UINTN ResultSize;
-
- ResultSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (mSemihostFsLabel);
-
- if (*BufferSize >= ResultSize) {
- ZeroMem (Buffer, ResultSize);
- Status = EFI_SUCCESS;
-
- Info = Buffer;
-
- Info->Size = ResultSize;
- Info->ReadOnly = FALSE;
- Info->VolumeSize = 0;
- Info->FreeSpace = 0;
- Info->BlockSize = 0;
-
- StrCpy (Info->VolumeLabel, mSemihostFsLabel);
- } else {
- Status = EFI_BUFFER_TOO_SMALL;
- }
-
- *BufferSize = ResultSize;
- return Status;
-}
-
-/**
- Return information about a file or a file system.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that
- is the file handle the requested information is for.
- @param[in] InformationType The type identifier for the information being requested :
- EFI_FILE_INFO_ID or EFI_FILE_SYSTEM_INFO_ID or
- EFI_FILE_SYSTEM_VOLUME_LABEL_ID
- @param[in out] BufferSize The size, in bytes, of Buffer.
- @param[out] Buffer A pointer to the data buffer to return. The type of the
- data inside the buffer is indicated by InformationType.
-
- @retval EFI_SUCCESS The information was returned.
- @retval EFI_UNSUPPORTED The InformationType is not known.
- @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to return the information.
- BufferSize has been updated with the size needed to
- complete the request.
- @retval EFI_INVALID_PARAMETER The parameter "This" or "InformationType" or "BufferSize"
- is NULL or "Buffer" is NULL and "*Buffersize" is greater
- than 0.
-
-**/
-EFI_STATUS
-FileGetInfo (
- IN EFI_FILE *This,
- IN EFI_GUID *InformationType,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer
- )
-{
- SEMIHOST_FCB *Fcb;
- EFI_STATUS Status;
- UINTN ResultSize;
-
- if ((This == NULL) ||
- (InformationType == NULL) ||
- (BufferSize == NULL) ||
- ((Buffer == NULL) && (*BufferSize > 0)) ) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS(This);
-
- if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
- Status = GetFilesystemInfo (Fcb, BufferSize, Buffer);
- } else if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {
- Status = GetFileInfo (Fcb, BufferSize, Buffer);
- } else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
- ResultSize = StrSize (mSemihostFsLabel);
-
- if (*BufferSize >= ResultSize) {
- StrCpy (Buffer, mSemihostFsLabel);
- Status = EFI_SUCCESS;
- } else {
- Status = EFI_BUFFER_TOO_SMALL;
- }
-
- *BufferSize = ResultSize;
- } else {
- Status = EFI_UNSUPPORTED;
- }
-
- return Status;
-}
-
-/**
- Set information about a file.
-
- @param[in] Fcb A pointer to the description of the open file.
- @param[in] Info A pointer to the file information to write.
-
- @retval EFI_SUCCESS The information was set.
- @retval EFI_ACCESS_DENIED An attempt is made to change the name of a file
- to a file that is already present.
- @retval EFI_ACCESS_DENIED An attempt is being made to change the
- EFI_FILE_DIRECTORY Attribute.
- @retval EFI_ACCESS_DENIED The file is a read-only file or has been
- opened in read-only mode and an attempt is
- being made to modify a field other than
- Attribute.
- @retval EFI_WRITE_PROTECTED An attempt is being made to modify a
- read-only attribute.
- @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.
- @retval EFI_OUT_OF_RESOURCES A allocation needed to process the request failed.
-
-**/
-STATIC
-EFI_STATUS
-SetFileInfo (
- IN SEMIHOST_FCB *Fcb,
- IN EFI_FILE_INFO *Info
- )
-{
- EFI_STATUS Status;
- RETURN_STATUS Return;
- BOOLEAN FileSizeIsDifferent;
- BOOLEAN FileNameIsDifferent;
- BOOLEAN ReadOnlyIsDifferent;
- CHAR8 *AsciiFileName;
- UINTN FileSize;
- UINTN Length;
- UINTN SemihostHandle;
-
- //
- // A directory can not be changed to a file and a file can
- // not be changed to a directory.
- //
- if (((Info->Attribute & EFI_FILE_DIRECTORY) != 0) != Fcb->IsRoot) {
- return EFI_ACCESS_DENIED;
- }
-
- AsciiFileName = AllocatePool (StrLen (Info->FileName) + 1);
- if (AsciiFileName == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- UnicodeStrToAsciiStr (Info->FileName, AsciiFileName);
-
- FileSizeIsDifferent = (Info->FileSize != Fcb->Info.FileSize);
- FileNameIsDifferent = (AsciiStrCmp (AsciiFileName, Fcb->FileName) != 0);
- ReadOnlyIsDifferent = CompareMem (
- &Info->CreateTime,
- &Fcb->Info.CreateTime,
- 3 * sizeof (EFI_TIME)
- ) != 0;
-
- //
- // For a read-only file or a file opened in read-only mode, only
- // the Attribute field can be modified. As the root directory is
- // read-only (i.e. VolumeOpen()), this protects the root directory
- // description.
- //
- if ((Fcb->OpenMode == EFI_FILE_MODE_READ) ||
- (Fcb->Info.Attribute & EFI_FILE_READ_ONLY) ) {
- if (FileSizeIsDifferent || FileNameIsDifferent || ReadOnlyIsDifferent) {
- Status = EFI_ACCESS_DENIED;
- goto Error;
- }
- }
-
- if (ReadOnlyIsDifferent) {
- Status = EFI_WRITE_PROTECTED;
- goto Error;
- }
-
- Status = EFI_DEVICE_ERROR;
-
- if (FileSizeIsDifferent) {
- FileSize = Info->FileSize;
- if (Fcb->Info.FileSize < FileSize) {
- Status = ExtendFile (Fcb, FileSize - Fcb->Info.FileSize);
- if (EFI_ERROR (Status)) {
- goto Error;
- }
- //
- // The read/write position from the host file system point of view
- // is at the end of the file. If the position from this module
- // point of view is smaller than the new file size, then
- // ask the host file system to move to that position.
- //
- if (Fcb->Position < FileSize) {
- FileSetPosition (&Fcb->File, Fcb->Position);
- }
- }
- Fcb->Info.FileSize = FileSize;
-
- Return = SemihostFileLength (Fcb->SemihostHandle, &Length);
- if (RETURN_ERROR (Return)) {
- goto Error;
- }
- Fcb->Info.PhysicalSize = Length;
- }
-
- //
- // Note down in RAM the Attribute field but we can not ask
- // for its modification to the host file system as the
- // semi-host interface does not provide this feature.
- //
- Fcb->Info.Attribute = Info->Attribute;
-
- if (FileNameIsDifferent) {
- Return = SemihostFileOpen (
- AsciiFileName,
- SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY,
- &SemihostHandle
- );
- if (!RETURN_ERROR (Return)) {
- SemihostFileClose (SemihostHandle);
- Status = EFI_ACCESS_DENIED;
- goto Error;
- }
-
- Return = SemihostFileRename (Fcb->FileName, AsciiFileName);
- if (RETURN_ERROR (Return)) {
- goto Error;
- }
- FreePool (Fcb->FileName);
- Fcb->FileName = AsciiFileName;
- AsciiFileName = NULL;
- }
-
- Status = EFI_SUCCESS;
-
-Error:
- if (AsciiFileName != NULL) {
- FreePool (AsciiFileName);
- }
-
- return Status;
-}
-
-/**
- Set information about a file or a file system.
-
- @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that
- is the file handle the information is for.
- @param[in] InformationType The type identifier for the information being set :
- EFI_FILE_INFO_ID or EFI_FILE_SYSTEM_INFO_ID or
- EFI_FILE_SYSTEM_VOLUME_LABEL_ID
- @param[in] BufferSize The size, in bytes, of Buffer.
- @param[in] Buffer A pointer to the data buffer to write. The type of the
- data inside the buffer is indicated by InformationType.
-
- @retval EFI_SUCCESS The information was set.
- @retval EFI_UNSUPPORTED The InformationType is not known.
- @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.
- @retval EFI_ACCESS_DENIED An attempt is being made to change the
- EFI_FILE_DIRECTORY Attribute.
- @retval EFI_ACCESS_DENIED InformationType is EFI_FILE_INFO_ID and
- the file is a read-only file or has been
- opened in read-only mode and an attempt is
- being made to modify a field other than
- Attribute.
- @retval EFI_ACCESS_DENIED An attempt is made to change the name of a file
- to a file that is already present.
- @retval EFI_WRITE_PROTECTED An attempt is being made to modify a
- read-only attribute.
- @retval EFI_BAD_BUFFER_SIZE The size of the buffer is lower than that indicated by
- the data inside the buffer.
- @retval EFI_OUT_OF_RESOURCES An allocation needed to process the request failed.
- @retval EFI_INVALID_PARAMETER At least one of the parameters is invalid.
-
-**/
-EFI_STATUS
-FileSetInfo (
- IN EFI_FILE *This,
- IN EFI_GUID *InformationType,
- IN UINTN BufferSize,
- IN VOID *Buffer
- )
-{
- SEMIHOST_FCB *Fcb;
- EFI_FILE_INFO *Info;
- EFI_FILE_SYSTEM_INFO *SystemInfo;
- CHAR16 *VolumeLabel;
-
- if ((This == NULL) || (InformationType == NULL) || (Buffer == NULL)) {
- return EFI_INVALID_PARAMETER;
- }
-
- Fcb = SEMIHOST_FCB_FROM_THIS (This);
-
- if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {
- Info = Buffer;
- if (Info->Size < (SIZE_OF_EFI_FILE_INFO + StrSize (Info->FileName))) {
- return EFI_INVALID_PARAMETER;
- }
- if (BufferSize < Info->Size) {
- return EFI_BAD_BUFFER_SIZE;
- }
- return SetFileInfo (Fcb, Info);
- } else if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
- SystemInfo = Buffer;
- if (SystemInfo->Size <
- (SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (SystemInfo->VolumeLabel))) {
- return EFI_INVALID_PARAMETER;
- }
- if (BufferSize < SystemInfo->Size) {
- return EFI_BAD_BUFFER_SIZE;
- }
- Buffer = SystemInfo->VolumeLabel;
-
- if (StrSize (Buffer) > 0) {
- VolumeLabel = AllocateCopyPool (StrSize (Buffer), Buffer);
- if (VolumeLabel != NULL) {
- FreePool (mSemihostFsLabel);
- mSemihostFsLabel = VolumeLabel;
- return EFI_SUCCESS;
- } else {
- return EFI_OUT_OF_RESOURCES;
- }
- } else {
- return EFI_INVALID_PARAMETER;
- }
- } else if (!CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
- return EFI_UNSUPPORTED;
- } else {
- return EFI_UNSUPPORTED;
- }
-}
-
-EFI_STATUS
-FileFlush (
- IN EFI_FILE *File
- )
-{
- SEMIHOST_FCB *Fcb;
-
- Fcb = SEMIHOST_FCB_FROM_THIS(File);
-
- if (Fcb->IsRoot) {
- return EFI_SUCCESS;
- } else {
- if ((Fcb->Info.Attribute & EFI_FILE_READ_ONLY)
- || !(Fcb->OpenMode & EFI_FILE_MODE_WRITE)) {
- return EFI_ACCESS_DENIED;
- } else {
- return EFI_SUCCESS;
- }
- }
-}
-
-EFI_STATUS
-SemihostFsEntryPoint (
- IN EFI_HANDLE ImageHandle,
- IN EFI_SYSTEM_TABLE *SystemTable
- )
-{
- EFI_STATUS Status;
-
- Status = EFI_NOT_FOUND;
-
- if (SemihostConnectionSupported ()) {
- mSemihostFsLabel = AllocateCopyPool (StrSize (DEFAULT_SEMIHOST_FS_LABEL), DEFAULT_SEMIHOST_FS_LABEL);
- if (mSemihostFsLabel == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- Status = gBS->InstallMultipleProtocolInterfaces (
- &gInstallHandle,
- &gEfiSimpleFileSystemProtocolGuid, &gSemihostFs,
- &gEfiDevicePathProtocolGuid, &gDevicePath,
- NULL
- );
-
- if (EFI_ERROR(Status)) {
- FreePool (mSemihostFsLabel);
- }
- }
-
- return Status;
-}
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