Import ACPICA 20130215.vendor/acpica/20130214

1 files changed, 84 insertions, 0 deletions

diff --git a/source/compiler/aslcompile.c b/source/compiler/aslcompile.c
index af7e1b8c03be..c7528704f92a 100644
--- a/source/compiler/aslcompile.c
+++ b/source/compiler/aslcompile.c
@@ -42,6 +42,7 @@
  */
 
 #include "aslcompiler.h"
+#include "dtcompiler.h"
 
 #include <stdio.h>
 #include <time.h>
@@ -343,6 +344,89 @@ FlConsumeNewComment (
 
 /*******************************************************************************
  *
+ * FUNCTION:    FlCheckForAcpiTable
+ *
+ * PARAMETERS:  Handle              - Open input file
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Determine if a file seems to be a binary ACPI table, via the
+ *              following checks on what would be the table header:
+ *              0) File must be at least as long as an ACPI_TABLE_HEADER
+ *              1) The header length field must match the file size
+ *              2) Signature, OemId, OemTableId, AslCompilerId must be ASCII
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+FlCheckForAcpiTable (
+    FILE                    *Handle)
+{
+    ACPI_TABLE_HEADER       Table;
+    UINT32                  FileSize;
+    size_t                  Actual;
+    UINT32                  i;
+
+
+    /* Read a potential table header */
+
+    Actual = fread (&Table, 1, sizeof (ACPI_TABLE_HEADER), Handle);
+    fseek (Handle, 0, SEEK_SET);
+
+    if (Actual < sizeof (ACPI_TABLE_HEADER))
+    {
+        return (AE_ERROR);
+    }
+
+    /* Header length field must match the file size */
+
+    FileSize = DtGetFileSize (Handle);
+    if (Table.Length != FileSize)
+    {
+        return (AE_ERROR);
+    }
+
+    /*
+     * These fields must be ASCII:
+     * Signature, 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) Table.Signature[i]))
+        {
+            return (AE_ERROR);
+        }
+
+        if (!ACPI_IS_ASCII ((UINT8) Table.AslCompilerId[i]))
+        {
+            return (AE_ERROR);
+        }
+    }
+
+    for (i = 0; (i < ACPI_OEM_ID_SIZE) && (Table.OemId[i]); i++)
+    {
+        if (!ACPI_IS_ASCII ((UINT8) Table.OemId[i]))
+        {
+            return (AE_ERROR);
+        }
+    }
+
+    for (i = 0; (i < ACPI_OEM_TABLE_ID_SIZE) && (Table.OemTableId[i]); i++)
+    {
+        if (!ACPI_IS_ASCII ((UINT8) Table.OemTableId[i]))
+        {
+            return (AE_ERROR);
+        }
+    }
+
+    printf ("Binary file appears to be a valid ACPI table, disassembling\n");
+    return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
  * FUNCTION:    FlCheckForAscii
  *
  * PARAMETERS:  Handle              - Open input file