mirror of https://github.com/acidanthera/audk.git
539 lines
12 KiB
C
539 lines
12 KiB
C
/** @file
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Support a Semi Host file system over a debuggers JTAG
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Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <Guid/FileInfo.h>
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#include <Guid/FileSystemInfo.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/SemihostLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiLib.h>
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#include <Protocol/DevicePath.h>
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#include <Protocol/SimpleFileSystem.h>
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#include "SemihostFs.h"
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL gSemihostFs = {
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,
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VolumeOpen
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};
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EFI_FILE gSemihostFsFile = {
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EFI_FILE_PROTOCOL_REVISION,
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FileOpen,
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FileClose,
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FileDelete,
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FileRead,
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FileWrite,
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FileGetPosition,
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FileSetPosition,
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FileGetInfo,
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FileSetInfo,
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FileFlush
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};
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//
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// Device path for SemiHosting. It contains our autogened Caller ID GUID.
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//
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typedef struct {
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VENDOR_DEVICE_PATH Guid;
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EFI_DEVICE_PATH_PROTOCOL End;
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} SEMIHOST_DEVICE_PATH;
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SEMIHOST_DEVICE_PATH gDevicePath = {
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{
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{ HARDWARE_DEVICE_PATH, HW_VENDOR_DP, sizeof (VENDOR_DEVICE_PATH), 0 },
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EFI_CALLER_ID_GUID
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},
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{ END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, sizeof (EFI_DEVICE_PATH_PROTOCOL), 0}
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};
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typedef struct {
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LIST_ENTRY Link;
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UINT64 Signature;
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EFI_FILE File;
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CHAR8 *FileName;
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UINT32 Position;
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UINT32 SemihostHandle;
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BOOLEAN IsRoot;
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} SEMIHOST_FCB;
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#define SEMIHOST_FCB_SIGNATURE SIGNATURE_32( 'S', 'H', 'F', 'C' )
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#define SEMIHOST_FCB_FROM_THIS(a) CR(a, SEMIHOST_FCB, File, SEMIHOST_FCB_SIGNATURE)
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#define SEMIHOST_FCB_FROM_LINK(a) CR(a, SEMIHOST_FCB, Link, SEMIHOST_FCB_SIGNATURE);
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EFI_HANDLE gInstallHandle = NULL;
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LIST_ENTRY gFileList = INITIALIZE_LIST_HEAD_VARIABLE (gFileList);
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SEMIHOST_FCB *
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AllocateFCB (
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VOID
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)
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{
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SEMIHOST_FCB *Fcb = AllocateZeroPool (sizeof (SEMIHOST_FCB));
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if (Fcb != NULL) {
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CopyMem (&Fcb->File, &gSemihostFsFile, sizeof (gSemihostFsFile));
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Fcb->Signature = SEMIHOST_FCB_SIGNATURE;
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}
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return Fcb;
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}
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VOID
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FreeFCB (
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IN SEMIHOST_FCB *Fcb
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)
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{
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// Remove Fcb from gFileList.
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RemoveEntryList (&Fcb->Link);
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// To help debugging...
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Fcb->Signature = 0;
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FreePool (Fcb);
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}
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EFI_STATUS
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VolumeOpen (
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IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
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OUT EFI_FILE **Root
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)
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{
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SEMIHOST_FCB *RootFcb = NULL;
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if (Root == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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RootFcb = AllocateFCB ();
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if (RootFcb == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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RootFcb->IsRoot = TRUE;
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InsertTailList (&gFileList, &RootFcb->Link);
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*Root = &RootFcb->File;
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return EFI_SUCCESS;
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}
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EFI_STATUS
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FileOpen (
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IN EFI_FILE *File,
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OUT EFI_FILE **NewHandle,
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IN CHAR16 *FileName,
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IN UINT64 OpenMode,
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IN UINT64 Attributes
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)
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{
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SEMIHOST_FCB *FileFcb = NULL;
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EFI_STATUS Status = EFI_SUCCESS;
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UINT32 SemihostHandle;
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CHAR8 *AsciiFileName;
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CHAR8 *AsciiPtr;
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UINTN Length;
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UINT32 SemihostMode;
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BOOLEAN IsRoot;
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if ((FileName == NULL) || (NewHandle == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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// Semihost interface requires ASCII filesnames
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Length = StrSize (FileName);
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AsciiFileName = AllocatePool (Length);
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if (AsciiFileName == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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AsciiPtr = AsciiFileName;
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while (Length--) {
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*AsciiPtr++ = *FileName++ & 0xFF;
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}
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if ((AsciiStrCmp (AsciiFileName, "\\") == 0) ||
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(AsciiStrCmp (AsciiFileName, "/") == 0) ||
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(AsciiStrCmp (AsciiFileName, "") == 0) ||
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(AsciiStrCmp (AsciiFileName, ".") == 0)) {
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// Opening '/', '\', '.', or the NULL pathname is trying to open the root directory
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IsRoot = TRUE;
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// Root directory node doesn't have a name.
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FreePool (AsciiFileName);
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AsciiFileName = NULL;
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} else {
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// Translate EFI_FILE_MODE into Semihosting mode
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if (OpenMode & EFI_FILE_MODE_WRITE) {
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SemihostMode = SEMIHOST_FILE_MODE_WRITE | SEMIHOST_FILE_MODE_BINARY;
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} else if (OpenMode & EFI_FILE_MODE_READ) {
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SemihostMode = SEMIHOST_FILE_MODE_READ | SEMIHOST_FILE_MODE_BINARY;
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} else {
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return EFI_UNSUPPORTED;
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}
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// Add the creation flag if necessary
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if (OpenMode & EFI_FILE_MODE_CREATE) {
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SemihostMode |= SEMIHOST_FILE_MODE_CREATE;
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}
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// Call the semihosting interface to open the file.
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Status = SemihostFileOpen (AsciiFileName, SemihostMode, &SemihostHandle);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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IsRoot = FALSE;
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}
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// Allocate a control block and fill it
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FileFcb = AllocateFCB ();
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if (FileFcb == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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FileFcb->FileName = AsciiFileName;
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FileFcb->SemihostHandle = SemihostHandle;
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FileFcb->Position = 0;
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FileFcb->IsRoot = IsRoot;
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InsertTailList (&gFileList, &FileFcb->Link);
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*NewHandle = &FileFcb->File;
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return Status;
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}
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EFI_STATUS
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FileClose (
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IN EFI_FILE *File
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)
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{
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SEMIHOST_FCB *Fcb = NULL;
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EFI_STATUS Status = EFI_SUCCESS;
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Fcb = SEMIHOST_FCB_FROM_THIS(File);
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if (Fcb->IsRoot == TRUE) {
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FreeFCB (Fcb);
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Status = EFI_SUCCESS;
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} else {
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Status = SemihostFileClose (Fcb->SemihostHandle);
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if (!EFI_ERROR(Status)) {
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FreePool (Fcb->FileName);
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FreeFCB (Fcb);
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}
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}
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return Status;
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}
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EFI_STATUS
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FileDelete (
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IN EFI_FILE *File
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)
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{
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SEMIHOST_FCB *Fcb = NULL;
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EFI_STATUS Status;
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CHAR8 *FileName;
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UINTN NameSize;
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Fcb = SEMIHOST_FCB_FROM_THIS(File);
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if (!Fcb->IsRoot) {
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// Get the filename from the Fcb
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NameSize = AsciiStrLen (Fcb->FileName);
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FileName = AllocatePool (NameSize + 1);
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AsciiStrCpy (FileName, Fcb->FileName);
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// Close the file if it's open. Disregard return status,
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// since it might give an error if the file isn't open.
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File->Close (File);
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// Call the semihost interface to delete the file.
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Status = SemihostFileRemove (FileName);
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} else {
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Status = EFI_UNSUPPORTED;
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}
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return Status;
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}
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EFI_STATUS
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FileRead (
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IN EFI_FILE *File,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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SEMIHOST_FCB *Fcb = NULL;
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EFI_STATUS Status;
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Fcb = SEMIHOST_FCB_FROM_THIS(File);
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if (Fcb->IsRoot == TRUE) {
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Status = EFI_UNSUPPORTED;
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} else {
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Status = SemihostFileRead (Fcb->SemihostHandle, BufferSize, Buffer);
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if (!EFI_ERROR (Status)) {
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Fcb->Position += *BufferSize;
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}
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}
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return Status;
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}
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EFI_STATUS
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FileWrite (
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IN EFI_FILE *File,
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IN OUT UINTN *BufferSize,
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IN VOID *Buffer
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)
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{
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SEMIHOST_FCB *Fcb = NULL;
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EFI_STATUS Status;
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UINTN WriteSize = *BufferSize;
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Fcb = SEMIHOST_FCB_FROM_THIS(File);
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Status = SemihostFileWrite (Fcb->SemihostHandle, &WriteSize, Buffer);
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if (!EFI_ERROR(Status)) {
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// Semihost write return the number of bytes *NOT* written.
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*BufferSize -= WriteSize;
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Fcb->Position += *BufferSize;
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}
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return Status;
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}
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EFI_STATUS
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FileGetPosition (
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IN EFI_FILE *File,
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OUT UINT64 *Position
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)
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{
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SEMIHOST_FCB *Fcb = NULL;
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if (Position == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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Fcb = SEMIHOST_FCB_FROM_THIS(File);
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*Position = Fcb->Position;
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return EFI_SUCCESS;
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}
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EFI_STATUS
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FileSetPosition (
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IN EFI_FILE *File,
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IN UINT64 Position
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)
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{
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SEMIHOST_FCB *Fcb = NULL;
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UINT32 Length;
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EFI_STATUS Status;
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Fcb = SEMIHOST_FCB_FROM_THIS(File);
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if (!Fcb->IsRoot) {
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Status = SemihostFileLength (Fcb->SemihostHandle, &Length);
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if (!EFI_ERROR(Status) && (Length < Position)) {
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Position = Length;
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}
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Status = SemihostFileSeek (Fcb->SemihostHandle, (UINT32)Position);
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if (!EFI_ERROR(Status)) {
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Fcb->Position = Position;
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}
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} else {
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Fcb->Position = Position;
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Status = EFI_SUCCESS;
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}
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return Status;
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}
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STATIC
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EFI_STATUS
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GetFileInfo (
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IN SEMIHOST_FCB *Fcb,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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EFI_FILE_INFO *Info = NULL;
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UINTN NameSize = 0;
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UINTN ResultSize;
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UINTN Index;
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UINT32 Length;
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EFI_STATUS Status;
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if (Fcb->IsRoot == TRUE) {
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ResultSize = SIZE_OF_EFI_FILE_INFO + sizeof(CHAR16);
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} else {
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NameSize = AsciiStrLen (Fcb->FileName) + 1;
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ResultSize = SIZE_OF_EFI_FILE_INFO + NameSize * sizeof (CHAR16);
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}
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if (*BufferSize < ResultSize) {
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*BufferSize = ResultSize;
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return EFI_BUFFER_TOO_SMALL;
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}
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Info = Buffer;
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// Zero out the structure
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ZeroMem (Info, SIZE_OF_EFI_FILE_INFO);
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// Fill in the structure
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Info->Size = ResultSize;
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if (Fcb->IsRoot == TRUE) {
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Info->Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;
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Info->FileName[0] = L'\0';
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} else {
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Status = SemihostFileLength (Fcb->SemihostHandle, &Length);
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if (EFI_ERROR(Status)) {
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return Status;
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}
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Info->FileSize = Length;
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Info->PhysicalSize = Length;
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for (Index = 0; Index < NameSize; Index++) {
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Info->FileName[Index] = Fcb->FileName[Index];
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}
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}
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*BufferSize = ResultSize;
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return EFI_SUCCESS;
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}
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STATIC
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EFI_STATUS
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GetFilesystemInfo (
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IN SEMIHOST_FCB *Fcb,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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EFI_FILE_SYSTEM_INFO *Info = NULL;
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EFI_STATUS Status;
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STATIC CHAR16 Label[] = L"SemihostFs";
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UINTN ResultSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize(Label);
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if(*BufferSize >= ResultSize) {
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ZeroMem (Buffer, ResultSize);
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Status = EFI_SUCCESS;
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Info = Buffer;
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Info->Size = ResultSize;
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Info->ReadOnly = FALSE;
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Info->VolumeSize = 0;
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Info->FreeSpace = 0;
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Info->BlockSize = 0;
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StrCpy (Info->VolumeLabel, Label);
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} else {
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Status = EFI_BUFFER_TOO_SMALL;
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}
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*BufferSize = ResultSize;
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return Status;
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}
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EFI_STATUS
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FileGetInfo (
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IN EFI_FILE *File,
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IN EFI_GUID *InformationType,
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IN OUT UINTN *BufferSize,
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OUT VOID *Buffer
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)
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{
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SEMIHOST_FCB *Fcb = NULL;
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EFI_STATUS Status = EFI_UNSUPPORTED;
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Fcb = SEMIHOST_FCB_FROM_THIS(File);
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if (CompareGuid(InformationType, &gEfiFileSystemInfoGuid) != 0) {
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Status = GetFilesystemInfo(Fcb, BufferSize, Buffer);
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} else if (CompareGuid(InformationType, &gEfiFileInfoGuid) != 0) {
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Status = GetFileInfo(Fcb, BufferSize, Buffer);
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}
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return Status;
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}
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EFI_STATUS
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FileSetInfo (
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IN EFI_FILE *File,
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IN EFI_GUID *InformationType,
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IN UINTN BufferSize,
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IN VOID *Buffer
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)
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{
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return EFI_UNSUPPORTED;
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}
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EFI_STATUS
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FileFlush (
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IN EFI_FILE *File
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)
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{
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return EFI_SUCCESS;
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}
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EFI_STATUS
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SemihostFsEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status = EFI_NOT_FOUND;
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if (SemihostConnectionSupported ()) {
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Status = gBS->InstallMultipleProtocolInterfaces (
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&gInstallHandle,
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&gEfiSimpleFileSystemProtocolGuid, &gSemihostFs,
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&gEfiDevicePathProtocolGuid, &gDevicePath,
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NULL
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);
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}
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return Status;
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}
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