BOOLEAN
ApIsValidHeader (
ACPI_TABLE_HEADER *Table)
{
if (!ACPI_VALIDATE_RSDP_SIG (Table->Signature))
{
/* Make sure signature is all ASCII and a valid ACPI name */
if (!AcpiUtValidNameseg (Table->Signature))
{
fprintf (stderr, "Table signature (0x%8.8X) is invalid\n",
*(UINT32 *) Table->Signature);
return (FALSE);
}
/* Check for minimum table length */
if (Table->Length < sizeof (ACPI_TABLE_HEADER))
{
fprintf (stderr, "Table length (0x%8.8X) is invalid\n",
Table->Length);
return (FALSE);
}
}
return (TRUE);
}
ACPI_STATUS
AcpiTbVerifyTempTable (
ACPI_TABLE_DESC *TableDesc,
char *Signature)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (TbVerifyTempTable);
/* Validate the table */
Status = AcpiTbValidateTempTable (TableDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* If a particular signature is expected (DSDT/FACS), it must match */
if (Signature &&
!ACPI_COMPARE_NAME (&TableDesc->Signature, Signature))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Invalid signature 0x%X for ACPI table, expected [%s]",
TableDesc->Signature.Integer, Signature));
Status = AE_BAD_SIGNATURE;
goto InvalidateAndExit;
}
/* Verify the checksum */
if (AcpiGbl_VerifyTableChecksum)
{
Status = AcpiTbVerifyChecksum (TableDesc->Pointer, TableDesc->Length);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
"%4.4s 0x%8.8X%8.8X"
" Attempted table install failed",
AcpiUtValidNameseg (TableDesc->Signature.Ascii) ?
TableDesc->Signature.Ascii : "????",
ACPI_FORMAT_UINT64 (TableDesc->Address)));
goto InvalidateAndExit;
}
}
return_ACPI_STATUS (AE_OK);
InvalidateAndExit:
AcpiTbInvalidateTable (TableDesc);
return_ACPI_STATUS (Status);
}
static BOOLEAN
AbValidateHeader (
ACPI_TABLE_HEADER *Header)
{
if (!AcpiUtValidNameseg (Header->Signature))
{
printf ("Header signature is invalid\n");
return (FALSE);
}
return (TRUE);
}
int
ApDumpTableFromFile (
char *Pathname)
{
ACPI_TABLE_HEADER *Table;
UINT32 FileSize = 0;
int TableStatus = -1;
/* Get the entire ACPI table from the file */
Table = ApGetTableFromFile (Pathname, &FileSize);
if (!Table)
{
return (-1);
}
if (!AcpiUtValidNameseg (Table->Signature))
{
fprintf (stderr,
"No valid ACPI signature was found in input file %s\n",
Pathname);
}
/* File must be at least as long as the table length */
if (Table->Length > FileSize)
{
fprintf (stderr,
"Table length (0x%X) is too large for input file (0x%X) %s\n",
Table->Length, FileSize, Pathname);
goto Exit;
}
if (Gbl_VerboseMode)
{
fprintf (stderr,
"Input file: %s contains table [%4.4s], 0x%X (%u) bytes\n",
Pathname, Table->Signature, FileSize, FileSize);
}
TableStatus = ApDumpTableBuffer (Table, 0, 0);
Exit:
ACPI_FREE (Table);
return (TableStatus);
}
ACPI_STATUS
AcValidateTableHeader (
FILE *File,
long TableOffset)
{
ACPI_TABLE_HEADER TableHeader;
ACPI_SIZE Actual;
long OriginalOffset;
UINT32 FileSize;
UINT32 i;
ACPI_FUNCTION_TRACE (AcValidateTableHeader);
/* Read a potential table header */
OriginalOffset = ftell (File);
fseek (File, TableOffset, SEEK_SET);
Actual = fread (&TableHeader, 1, sizeof (ACPI_TABLE_HEADER), File);
fseek (File, OriginalOffset, SEEK_SET);
if (Actual < sizeof (ACPI_TABLE_HEADER))
{
return (AE_ERROR);
}
/* Validate the signature (limited ASCII chars) */
if (!AcpiUtValidNameseg (TableHeader.Signature))
{
fprintf (stderr, "Invalid table signature: 0x%8.8X\n",
*ACPI_CAST_PTR (UINT32, TableHeader.Signature));
return (AE_BAD_SIGNATURE);
}
/* Validate table length against bytes remaining in the file */
FileSize = CmGetFileSize (File);
if (TableHeader.Length > (UINT32) (FileSize - TableOffset))
{
fprintf (stderr, "Table [%4.4s] is too long for file - "
"needs: 0x%.2X, remaining in file: 0x%.2X\n",
TableHeader.Signature, TableHeader.Length,
(UINT32) (FileSize - TableOffset));
return (AE_BAD_HEADER);
}
/*
* These fields must be ASCII: OemId, OemTableId, AslCompilerId.
* We allow a NULL terminator in OemId and OemTableId.
*/
for (i = 0; i < ACPI_NAME_SIZE; i++)
{
if (!ACPI_IS_ASCII ((UINT8) TableHeader.AslCompilerId[i]))
{
goto BadCharacters;
}
}
for (i = 0; (i < ACPI_OEM_ID_SIZE) && (TableHeader.OemId[i]); i++)
{
if (!ACPI_IS_ASCII ((UINT8) TableHeader.OemId[i]))
{
goto BadCharacters;
}
}
for (i = 0; (i < ACPI_OEM_TABLE_ID_SIZE) && (TableHeader.OemTableId[i]); i++)
{
if (!ACPI_IS_ASCII ((UINT8) TableHeader.OemTableId[i]))
{
goto BadCharacters;
}
}
return (AE_OK);
BadCharacters:
ACPI_WARNING ((AE_INFO,
"Table header for [%4.4s] has invalid ASCII character(s)",
TableHeader.Signature));
return (AE_OK);
}
ACPI_STATUS
AcpiTbFindTable (
char *Signature,
char *OemId,
char *OemTableId,
UINT32 *TableIndex)
{
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_HEADER Header;
UINT32 i;
ACPI_FUNCTION_TRACE (TbFindTable);
/* Validate the input table signature */
if (!AcpiUtValidNameseg (Signature))
{
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
/* Don't allow the OEM strings to be too long */
if ((strlen (OemId) > ACPI_OEM_ID_SIZE) ||
(strlen (OemTableId) > ACPI_OEM_TABLE_ID_SIZE))
{
return_ACPI_STATUS (AE_AML_STRING_LIMIT);
}
/* Normalize the input strings */
memset (&Header, 0, sizeof (ACPI_TABLE_HEADER));
ACPI_MOVE_NAME (Header.Signature, Signature);
strncpy (Header.OemId, OemId, ACPI_OEM_ID_SIZE);
strncpy (Header.OemTableId, OemTableId, ACPI_OEM_TABLE_ID_SIZE);
/* Search for the table */
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (memcmp (&(AcpiGbl_RootTableList.Tables[i].Signature),
Header.Signature, ACPI_NAME_SIZE))
{
/* Not the requested table */
continue;
}
/* Table with matching signature has been found */
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
/* Table is not currently mapped, map it */
Status = AcpiTbValidateTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/* Check for table match on all IDs */
if (!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->Signature,
Header.Signature, ACPI_NAME_SIZE) &&
(!OemId[0] ||
!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemId,
Header.OemId, ACPI_OEM_ID_SIZE)) &&
(!OemTableId[0] ||
!memcmp (AcpiGbl_RootTableList.Tables[i].Pointer->OemTableId,
Header.OemTableId, ACPI_OEM_TABLE_ID_SIZE)))
{
*TableIndex = i;
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n",
Header.Signature));
goto UnlockAndExit;
}
}
Status = AE_NOT_FOUND;
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
int
AxListTables (
char *InputPathname)
{
FILE *InputFile;
size_t HeaderSize;
unsigned char Header[48];
ACPI_TABLE_HEADER *TableHeader = (ACPI_TABLE_HEADER *) (void *) Header;
/* Open input in text mode, output is in binary mode */
InputFile = fopen (InputPathname, "rt");
if (!InputFile)
{
printf ("Could not open input file %s\n", InputPathname);
return (-1);
}
if (!AxIsFileAscii (InputFile))
{
fclose (InputFile);
return (-1);
}
/* Dump the headers for all tables found in the input file */
printf ("\nSignature Length Revision OemId OemTableId"
" OemRevision CompilerId CompilerRevision\n\n");
while (fgets (Gbl_LineBuffer, AX_LINE_BUFFER_SIZE, InputFile))
{
/* Ignore empty lines and lines that start with a space */
if (AxIsEmptyLine (Gbl_LineBuffer) ||
(Gbl_LineBuffer[0] == ' '))
{
continue;
}
/* Get the 36 byte header and display the fields */
HeaderSize = AxGetTableHeader (InputFile, Header);
if (HeaderSize < 16)
{
continue;
}
/* RSDP has an oddball signature and header */
if (!strncmp (TableHeader->Signature, "RSD PTR ", 8))
{
AxCheckAscii ((char *) &Header[9], 6);
printf ("%7.4s \"%6.6s\"\n", "RSDP",
&Header[9]);
Gbl_TableCount++;
continue;
}
/* Minimum size for table with standard header */
if (HeaderSize < sizeof (ACPI_TABLE_HEADER))
{
continue;
}
if (!AcpiUtValidNameseg (TableHeader->Signature))
{
continue;
}
/* Signature and Table length */
Gbl_TableCount++;
printf ("%7.4s 0x%8.8X", TableHeader->Signature,
TableHeader->Length);
/* FACS has only signature and length */
if (ACPI_COMPARE_NAME (TableHeader->Signature, "FACS"))
{
printf ("\n");
continue;
}
/* OEM IDs and Compiler IDs */
AxCheckAscii (TableHeader->OemId, 6);
AxCheckAscii (TableHeader->OemTableId, 8);
AxCheckAscii (TableHeader->AslCompilerId, 4);
printf (
" 0x%2.2X \"%6.6s\" \"%8.8s\" 0x%8.8X"
" \"%4.4s\" 0x%8.8X\n",
TableHeader->Revision, TableHeader->OemId,
TableHeader->OemTableId, TableHeader->OemRevision,
TableHeader->AslCompilerId, TableHeader->AslCompilerRevision);
}
printf ("\nFound %u ACPI tables in %s\n", Gbl_TableCount, InputPathname);
fclose (InputFile);
return (0);
}
static ACPI_STATUS
AcpiDbIntegrityWalk (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_INTEGRITY_INFO *Info = (ACPI_INTEGRITY_INFO *) Context;
ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
ACPI_OPERAND_OBJECT *Object;
BOOLEAN Alias = TRUE;
Info->Nodes++;
/* Verify the NS node, and dereference aliases */
while (Alias)
{
if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
{
AcpiOsPrintf (
"Invalid Descriptor Type for Node %p [%s] - "
"is %2.2X should be %2.2X\n",
Node, AcpiUtGetDescriptorName (Node),
ACPI_GET_DESCRIPTOR_TYPE (Node), ACPI_DESC_TYPE_NAMED);
return (AE_OK);
}
if ((Node->Type == ACPI_TYPE_LOCAL_ALIAS) ||
(Node->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS))
{
Node = (ACPI_NAMESPACE_NODE *) Node->Object;
}
else
{
Alias = FALSE;
}
}
if (Node->Type > ACPI_TYPE_LOCAL_MAX)
{
AcpiOsPrintf ("Invalid Object Type for Node %p, Type = %X\n",
Node, Node->Type);
return (AE_OK);
}
if (!AcpiUtValidNameseg (Node->Name.Ascii))
{
AcpiOsPrintf ("Invalid AcpiName for Node %p\n", Node);
return (AE_OK);
}
Object = AcpiNsGetAttachedObject (Node);
if (Object)
{
Info->Objects++;
if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
{
AcpiOsPrintf ("Invalid Descriptor Type for Object %p [%s]\n",
Object, AcpiUtGetDescriptorName (Object));
}
}
return (AE_OK);
}
ACPI_STATUS
AcpiTbVerifyTempTable (
ACPI_TABLE_DESC *TableDesc,
char *Signature,
UINT32 *TableIndex)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (TbVerifyTempTable);
/* Validate the table */
Status = AcpiTbValidateTempTable (TableDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* If a particular signature is expected (DSDT/FACS), it must match */
if (Signature &&
!ACPI_COMPARE_NAMESEG (&TableDesc->Signature, Signature))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Invalid signature 0x%X for ACPI table, expected [%s]",
TableDesc->Signature.Integer, Signature));
Status = AE_BAD_SIGNATURE;
goto InvalidateAndExit;
}
if (AcpiGbl_EnableTableValidation)
{
/* Verify the checksum */
Status = AcpiTbVerifyChecksum (TableDesc->Pointer, TableDesc->Length);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
"%4.4s 0x%8.8X%8.8X"
" Attempted table install failed",
AcpiUtValidNameseg (TableDesc->Signature.Ascii) ?
TableDesc->Signature.Ascii : "????",
ACPI_FORMAT_UINT64 (TableDesc->Address)));
goto InvalidateAndExit;
}
/* Avoid duplications */
if (TableIndex)
{
Status = AcpiTbCheckDuplication (TableDesc, TableIndex);
if (ACPI_FAILURE (Status))
{
if (Status != AE_CTRL_TERMINATE)
{
ACPI_EXCEPTION ((AE_INFO, Status,
"%4.4s 0x%8.8X%8.8X"
" Table is already loaded",
AcpiUtValidNameseg (TableDesc->Signature.Ascii) ?
TableDesc->Signature.Ascii : "????",
ACPI_FORMAT_UINT64 (TableDesc->Address)));
}
goto InvalidateAndExit;
}
}
TableDesc->Flags |= ACPI_TABLE_IS_VERIFIED;
}
return_ACPI_STATUS (Status);
InvalidateAndExit:
AcpiTbInvalidateTable (TableDesc);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiTbInstallStandardTable (
ACPI_PHYSICAL_ADDRESS Address,
UINT8 Flags,
BOOLEAN Reload,
BOOLEAN Override,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_DESC NewTableDesc;
ACPI_FUNCTION_TRACE (TbInstallStandardTable);
/* Acquire a temporary table descriptor for validation */
Status = AcpiTbAcquireTempTable (&NewTableDesc, Address, Flags);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO,
"Could not acquire table length at %8.8X%8.8X",
ACPI_FORMAT_UINT64 (Address)));
return_ACPI_STATUS (Status);
}
/*
* Optionally do not load any SSDTs from the RSDT/XSDT. This can
* be useful for debugging ACPI problems on some machines.
*/
if (!Reload &&
AcpiGbl_DisableSsdtTableInstall &&
ACPI_COMPARE_NAME (&NewTableDesc.Signature, ACPI_SIG_SSDT))
{
ACPI_INFO ((
"Ignoring installation of %4.4s at %8.8X%8.8X",
NewTableDesc.Signature.Ascii, ACPI_FORMAT_UINT64 (Address)));
goto ReleaseAndExit;
}
/* Validate and verify a table before installation */
Status = AcpiTbVerifyTempTable (&NewTableDesc, NULL);
if (ACPI_FAILURE (Status))
{
goto ReleaseAndExit;
}
if (Reload)
{
/*
* Validate the incoming table signature.
*
* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
* 2) We added support for OEMx tables, signature "OEM".
* 3) Valid tables were encountered with a null signature, so we just
* gave up on validating the signature, (05/2008).
* 4) We encountered non-AML tables such as the MADT, which caused
* interpreter errors and kernel faults. So now, we once again allow
* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
*/
if ((NewTableDesc.Signature.Ascii[0] != 0x00) &&
(!ACPI_COMPARE_NAME (&NewTableDesc.Signature, ACPI_SIG_SSDT)) &&
(strncmp (NewTableDesc.Signature.Ascii, "OEM", 3)))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), "
"must be SSDT or OEMx",
AcpiUtValidNameseg (NewTableDesc.Signature.Ascii) ?
NewTableDesc.Signature.Ascii : "????",
NewTableDesc.Signature.Integer));
Status = AE_BAD_SIGNATURE;
goto ReleaseAndExit;
}
/* Check if table is already registered */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (!AcpiTbCompareTables (&NewTableDesc, i))
{
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
if (AcpiGbl_RootTableList.Tables[i].Flags &
ACPI_TABLE_IS_LOADED)
{
/* Table is still loaded, this is an error */
Status = AE_ALREADY_EXISTS;
goto ReleaseAndExit;
}
else
{
/*
* Table was unloaded, allow it to be reloaded.
* As we are going to return AE_OK to the caller, we should
* take the responsibility of freeing the input descriptor.
* Refill the input descriptor to ensure
* AcpiTbInstallTableWithOverride() can be called again to
* indicate the re-installation.
*/
AcpiTbUninstallTable (&NewTableDesc);
*TableIndex = i;
return_ACPI_STATUS (AE_OK);
}
}
}
/* Add the table to the global root table list */
AcpiTbInstallTableWithOverride (&NewTableDesc, Override, TableIndex);
ReleaseAndExit:
/* Release the temporary table descriptor */
AcpiTbReleaseTempTable (&NewTableDesc);
return_ACPI_STATUS (Status);
}
