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Diffstat (limited to 'StdLib/LibC/Uefi/Xform.c')
| -rw-r--r-- | StdLib/LibC/Uefi/Xform.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/StdLib/LibC/Uefi/Xform.c b/StdLib/LibC/Uefi/Xform.c new file mode 100644 index 0000000000..21eff6fb9d --- /dev/null +++ b/StdLib/LibC/Uefi/Xform.c @@ -0,0 +1,173 @@ +/** @file
+ Value transformations between stdio and the UEFI environment.
+
+ Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials are licensed and made available under
+ the terms and conditions of the BSD License that 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 <LibConfig.h>
+#include <sys/EfiCdefs.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include "SysEfi.h"
+
+/** Translate the Open flags into a Uefi Open Modes value.
+
+ The Open Flags are:
+ O_RDONLY, O_WRONLY, O_RDWR // Pick only one
+
+ O_NONBLOCK, O_APPEND, O_CREAT, O_TRUNC, O_EXCL // ORed with one of the previous
+
+ The UEFI Open modes are:
+ // ******************************************************
+ // Open Modes
+ // ******************************************************
+ #define EFI_FILE_MODE_READ 0x0000000000000001
+ #define EFI_FILE_MODE_WRITE 0x0000000000000002
+ #define EFI_FILE_MODE_CREATE 0x8000000000000000
+
+
+*/
+UINT64
+Oflags2EFI( int oflags )
+{
+ UINT64 flags;
+
+ // Build the Open Modes
+ flags = (UINT64)((oflags & O_ACCMODE) + 1); // Handle the Read/Write flags
+ if(oflags & (O_CREAT | O_TRUNC)) { // Now add the Create flag.
+ // Also added if O_TRUNC set since we will need to create a new file.
+ // We just set the flags here since the only valid EFI mode with create
+ // is Read+Write+Create.
+ flags = EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE;
+ }
+ return flags;
+}
+
+/* Transform the permissions flags from the open() call into the
+ Attributes bits needed by UEFI.
+
+ The UEFI File attributes are:
+ // ******************************************************
+ // File Attributes
+ // ******************************************************
+ #define EFI_FILE_READ_ONLY 0x0000000000000001
+ #define EFI_FILE_HIDDEN 0x0000000000000002
+ #define EFI_FILE_SYSTEM 0x0000000000000004
+ #define EFI_FILE_RESERVED 0x0000000000000008
+ #define EFI_FILE_DIRECTORY 0x0000000000000010
+ #define EFI_FILE_ARCHIVE 0x0000000000000020
+ #define EFI_FILE_VALID_ATTR 0x0000000000000037
+
+ The input permission flags consist of two groups:
+ ( S_IRUSR | S_IRGRP | S_IROTH ) -- S_ACC_READ
+ ( S_IWUSR | S_IWGRP | S_IWOTH ) -- S_ACC_WRITE
+
+ The only thing we can set, at this point, is whether or not
+ this is a SYSTEM file. If the group and other bits are
+ zero and the user bits are non-zero then set SYSTEM. Otherwise
+ the attributes are zero.
+
+ The attributes can be set later using fcntl().
+*/
+UINT64
+Omode2EFI( int mode)
+{
+ UINT64 flags = 0;
+
+ if((mode & (S_IRWXG | S_IRWXO)) == 0) {
+ if((mode & S_IRWXU) != 0) {
+ // Only user permissions so set system
+ flags = EFI_FILE_SYSTEM;
+ }
+ }
+ return flags;
+}
+
+/* Converts the first several EFI status values into the appropriate errno value.
+*/
+int
+EFI2errno( RETURN_STATUS Status)
+{
+ int retval;
+
+ switch(Status) {
+ case RETURN_SUCCESS:
+ retval = 0;
+ break;
+ case RETURN_INVALID_PARAMETER:
+ retval = EINVAL;
+ break;
+ case RETURN_UNSUPPORTED:
+ retval = ENODEV;
+ break;
+ case RETURN_BAD_BUFFER_SIZE:
+ case RETURN_BUFFER_TOO_SMALL:
+ retval = EBUFSIZE;
+ break;
+ case RETURN_NOT_READY:
+ retval = EBUSY;
+ break;
+ case RETURN_WRITE_PROTECTED:
+ retval = EROFS;
+ break;
+ case RETURN_OUT_OF_RESOURCES: // May be overridden by specific functions
+ retval = ENOMEM;
+ break;
+ case RETURN_VOLUME_FULL:
+ retval = ENOSPC;
+ break;
+ case RETURN_NOT_FOUND:
+ case RETURN_NO_MAPPING:
+ retval = ENOENT;
+ break;
+ case RETURN_TIMEOUT:
+ retval = ETIMEDOUT;
+ break;
+ case RETURN_NOT_STARTED:
+ retval = EAGAIN;
+ break;
+ case RETURN_ALREADY_STARTED:
+ retval = EALREADY;
+ break;
+ case RETURN_ABORTED:
+ retval = EINTR;
+ break;
+ case RETURN_ICMP_ERROR:
+ case RETURN_TFTP_ERROR:
+ case RETURN_PROTOCOL_ERROR:
+ retval = EPROTO;
+ break;
+ case RETURN_INCOMPATIBLE_VERSION:
+ retval = EPERM;
+ break;
+ case RETURN_ACCESS_DENIED:
+ case RETURN_SECURITY_VIOLATION:
+ retval = EACCES;
+ break;
+/* case RETURN_LOAD_ERROR:
+ case RETURN_DEVICE_ERROR:
+ case RETURN_VOLUME_CORRUPTED:
+ case RETURN_NO_MEDIA:
+ case RETURN_MEDIA_CHANGED:
+ case RETURN_NO_RESPONSE:
+ case RETURN_CRC_ERROR:
+ case RETURN_END_OF_MEDIA:
+ case RETURN_END_OF_FILE:
+ case RETURN_INVALID_LANGUAGE:
+*/
+ default:
+ retval = EIO;
+ break;
+ }
+ return retval;
+}
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