From 51b0d06c0a6c4d4e19432ebf930299855c8fcf23 Mon Sep 17 00:00:00 2001

From: Al Stone <ahs3@redhat.com>

Date: Fri, 18 Sep 2020 15:14:30 -0600

Subject: [PATCH 02/45] Modify utility functions to be endian-agnostic

All of the modifications here use the big-endian code previously added

(see utendian.c) to make themselves endian-agnostic; i.e., that the code

does not need to change further to work on both big- and little-endian

machines.

These particular files were changed to handle the reading and writing

of files (the length is often embedded in the binary stream), and to

handle the reading and writing of integer values.  The common cases are

to "read" a 32-bit unsigned int in little-endian format, but convert it

to host-native, and to write a byte, word, double word or quad word value

as little-endian, regardless of host-native format.

Signed-off-by: Al Stone <ahs3@redhat.com>

---

 source/common/acfileio.c           | 16 ++++++++++------

 source/common/dmtable.c            |  8 ++++----

 source/compiler/dtfield.c          |  2 +-

 source/compiler/dtsubtable.c       |  4 ++--

 source/components/tables/tbprint.c | 13 +++++++++----

 5 files changed, 26 insertions(+), 17 deletions(-)

Index: acpica-unix2-20210604/source/common/acfileio.c

===================================================================

--- acpica-unix2-20210604.orig/source/common/acfileio.c

+++ acpica-unix2-20210604/source/common/acfileio.c

@@ -280,6 +280,7 @@ AcGetOneTableFromFile (

     ACPI_TABLE_HEADER       *Table;

     INT32                   Count;

     long                    TableOffset;

+    UINT32                  Length;

     *ReturnTable = NULL;

@@ -319,7 +320,8 @@ AcGetOneTableFromFile (

     /* Allocate a buffer for the entire table */

-    Table = AcpiOsAllocate ((ACPI_SIZE) TableHeader.Length);

+    Length = AcpiUtReadUint32 (&TableHeader.Length);

+    Table = AcpiOsAllocate ((ACPI_SIZE) Length);

     if (!Table)

     {

         return (AE_NO_MEMORY);

@@ -329,13 +331,13 @@ AcGetOneTableFromFile (

     fseek (File, TableOffset, SEEK_SET);

-    Count = fread (Table, 1, TableHeader.Length, File);

+    Count = fread (Table, 1, Length, File);

     /*

      * Checks for data table headers happen later in the execution. Only verify

      * for Aml tables at this point in the code.

      */

-    if (GetOnlyAmlTables && Count != (INT32) TableHeader.Length)

+    if (GetOnlyAmlTables && Count != (INT32) Length)

     {

         Status = AE_ERROR;

         goto ErrorExit;

@@ -343,7 +345,7 @@ AcGetOneTableFromFile (

     /* Validate the checksum (just issue a warning) */

-    Status = AcpiTbVerifyChecksum (Table, TableHeader.Length);

+    Status = AcpiTbVerifyChecksum (Table, Length);

     if (ACPI_FAILURE (Status))

     {

         Status = AcCheckTextModeCorruption (Table);

@@ -436,6 +438,7 @@ AcValidateTableHeader (

     long                    OriginalOffset;

     UINT32                  FileSize;

     UINT32                  i;

+    UINT32                  Length;

     ACPI_FUNCTION_TRACE (AcValidateTableHeader);

@@ -467,11 +470,12 @@ AcValidateTableHeader (

     /* Validate table length against bytes remaining in the file */

     FileSize = CmGetFileSize (File);

-    if (TableHeader.Length > (UINT32) (FileSize - TableOffset))

+    Length = AcpiUtReadUint32 (&TableHeader.Length);

+    if (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,

+            TableHeader.Signature, Length,

             (UINT32) (FileSize - TableOffset));

         return (AE_BAD_HEADER);

     }

Index: acpica-unix2-20210604/source/common/dmtable.c

===================================================================

--- acpica-unix2-20210604.orig/source/common/dmtable.c

+++ acpica-unix2-20210604/source/common/dmtable.c

@@ -591,7 +591,7 @@ AcpiDmDumpDataTable (

         {

             /* Dump the raw table data */

-            Length = Table->Length;

+            Length = AcpiUtReadUint32 (&Table->Length);

             AcpiOsPrintf ("\n/*\n%s: Length %d (0x%X)\n\n",

                 ACPI_RAW_TABLE_DATA_HEADER, Length, Length);

@@ -608,7 +608,7 @@ AcpiDmDumpDataTable (

      */

     if (ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_FACS))

     {

-        Length = Table->Length;

+        Length = AcpiUtReadUint32 (&Table->Length);

         Status = AcpiDmDumpTable (Length, 0, Table, 0, AcpiDmTableInfoFacs);

         if (ACPI_FAILURE (Status))

         {

@@ -628,7 +628,7 @@ AcpiDmDumpDataTable (

         /*

          * All other tables must use the common ACPI table header, dump it now

          */

-        Length = Table->Length;

+        Length = AcpiUtReadUint32(&Table->Length);

         Status = AcpiDmDumpTable (Length, 0, Table, 0, AcpiDmTableInfoHeader);

         if (ACPI_FAILURE (Status))

         {

@@ -1262,7 +1262,7 @@ AcpiDmDumpTable (

             AcpiOsPrintf ("%2.2X", *Target);

             Temp8 = AcpiDmGenerateChecksum (Table,

-                ACPI_CAST_PTR (ACPI_TABLE_HEADER, Table)->Length,

+                AcpiUtReadUint32 (&(ACPI_CAST_PTR (ACPI_TABLE_HEADER, Table)->Length)),

                 ACPI_CAST_PTR (ACPI_TABLE_HEADER, Table)->Checksum);

             if (Temp8 != ACPI_CAST_PTR (ACPI_TABLE_HEADER, Table)->Checksum)

Index: acpica-unix2-20210604/source/compiler/dtfield.c

===================================================================

--- acpica-unix2-20210604.orig/source/compiler/dtfield.c

+++ acpica-unix2-20210604/source/compiler/dtfield.c

@@ -361,7 +361,7 @@ DtCompileInteger (

         DtError (ASL_ERROR, ASL_MSG_INTEGER_SIZE, Field, AslGbl_MsgBuffer);

     }

-    memcpy (Buffer, &Value, ByteLength);

+    AcpiUtWriteUint (Buffer, ByteLength, &Value, sizeof (UINT64));

     return;

 }

Index: acpica-unix2-20210604/source/compiler/dtsubtable.c

===================================================================

--- acpica-unix2-20210604.orig/source/compiler/dtsubtable.c

+++ acpica-unix2-20210604/source/compiler/dtsubtable.c

@@ -378,6 +378,6 @@ DtSetSubtableLength (

         return;

     }

-    memcpy (Subtable->LengthField, &Subtable->TotalLength,

-        Subtable->SizeOfLengthField);

+    AcpiUtWriteUint (Subtable->LengthField, Subtable->SizeOfLengthField,

+                     &Subtable->TotalLength, sizeof (Subtable->TotalLength));

 }

Index: acpica-unix2-20210604/source/components/tables/tbprint.c

===================================================================

--- acpica-unix2-20210604.orig/source/components/tables/tbprint.c

+++ acpica-unix2-20210604/source/components/tables/tbprint.c

@@ -44,6 +44,8 @@

 #include "acpi.h"

 #include "accommon.h"

 #include "actables.h"

+#include "platform/acenv.h"

+#include "acutils.h"

 #define _COMPONENT          ACPI_TABLES

         ACPI_MODULE_NAME    ("tbprint")

@@ -151,7 +153,7 @@ AcpiTbPrintTableHeader (

         ACPI_INFO (("%-4.4s 0x%8.8X%8.8X %06X",

             Header->Signature, ACPI_FORMAT_UINT64 (Address),

-            Header->Length));

+            AcpiUtReadUint32 (&Header->Length)));

     }

     else if (ACPI_VALIDATE_RSDP_SIG (Header->Signature))

     {

@@ -178,9 +180,12 @@ AcpiTbPrintTableHeader (

             "%-4.4s 0x%8.8X%8.8X"

             " %06X (v%.2d %-6.6s %-8.8s %08X %-4.4s %08X)",

             LocalHeader.Signature, ACPI_FORMAT_UINT64 (Address),

-            LocalHeader.Length, LocalHeader.Revision, LocalHeader.OemId,

-            LocalHeader.OemTableId, LocalHeader.OemRevision,

-            LocalHeader.AslCompilerId, LocalHeader.AslCompilerRevision));

+            AcpiUtReadUint32 (&LocalHeader.Length),

+            LocalHeader.Revision, LocalHeader.OemId,

+            LocalHeader.OemTableId,

+            AcpiUtReadUint32 (&LocalHeader.OemRevision),

+            LocalHeader.AslCompilerId,

+            AcpiUtReadUint32 (&LocalHeader.AslCompilerRevision)));

     }

 }