Patch carried over from the prior iasl package and updated.  This allows

for builds on systems requiring aligned memory access. Please see

http://lists.acpica.org/pipermail/devel/2010-July/000159.html.  Resolves

BZ#865013 and BZ#856856.

--

Add more platforms to the list of the ones requiring aligned memory access.

Also fix callsites where wrong assumptions where made in terms of aligment.

Signed-off-by: Mattia Dongili <malattia@linux.it>

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

---

 source/components/executer/exoparg2.c |   12 +++++++++---

 source/include/actypes.h              |   26 +++++++++++++-------------

 3 files changed, 32 insertions(+), 21 deletions(-)

Index: acpica-unix2-20200925/source/components/executer/exoparg2.c

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

--- acpica-unix2-20200925.orig/source/components/executer/exoparg2.c

+++ acpica-unix2-20200925/source/components/executer/exoparg2.c

@@ -172,6 +172,8 @@ AcpiExOpcode_2A_2T_1R (

     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];

     ACPI_OPERAND_OBJECT     *ReturnDesc1 = NULL;

     ACPI_OPERAND_OBJECT     *ReturnDesc2 = NULL;

+    UINT64                  ReturnValue1 = 0;

+    UINT64                  ReturnValue2 = 0;

     ACPI_STATUS             Status;

@@ -206,8 +208,10 @@ AcpiExOpcode_2A_2T_1R (

         Status = AcpiUtDivide (

             Operand[0]->Integer.Value,

             Operand[1]->Integer.Value,

-            &ReturnDesc1->Integer.Value,

-            &ReturnDesc2->Integer.Value);

+            &ReturnValue1, &ReturnValue2);

+        ReturnDesc1->Integer.Value = ReturnValue1;

+        ReturnDesc2->Integer.Value = ReturnValue2;

+

         if (ACPI_FAILURE (Status))

         {

             goto Cleanup;

@@ -282,6 +286,7 @@ AcpiExOpcode_2A_1T_1R (

     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];

     ACPI_OPERAND_OBJECT     *ReturnDesc = NULL;

     UINT64                  Index;

+    UINT64                  ReturnValue = 0;

     ACPI_STATUS             Status = AE_OK;

     ACPI_SIZE               Length = 0;

@@ -327,7 +332,8 @@ AcpiExOpcode_2A_1T_1R (

             Operand[0]->Integer.Value,

             Operand[1]->Integer.Value,

             NULL,

-            &ReturnDesc->Integer.Value);

+            &ReturnValue);

+        ReturnDesc->Integer.Value = ReturnValue;

         break;

     case AML_CONCATENATE_OP: /* Concatenate (Data1, Data2, Result) */

Index: acpica-unix2-20200925/source/include/actypes.h

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

--- acpica-unix2-20200925.orig/source/include/actypes.h

+++ acpica-unix2-20200925/source/include/actypes.h

@@ -143,6 +143,19 @@ typedef COMPILER_DEPENDENT_INT64

  */

 #define ACPI_THREAD_ID                  UINT64

+/*

+ * In the case of the Itanium Processor Family (IPF), the hardware does not

+ * support misaligned memory transfers. Set the MISALIGNMENT_NOT_SUPPORTED flag

+ * to indicate that special precautions must be taken to avoid alignment faults.

+ * (IA64 or ia64 is currently used by existing compilers to indicate IPF.)

+ *

+ * Note: EM64T and other X86-64 processors support misaligned transfers,

+ * so there is no need to define this flag.

+ */

+#if defined (__IA64__) || defined (__ia64__) || defined(__alpha__) || defined(__sparc__) || defined(__hppa__) || defined(__arm__)

+#define ACPI_MISALIGNMENT_NOT_SUPPORTED

+#endif

+

 /*******************************************************************************

  *

@@ -170,20 +183,6 @@ typedef UINT64

 #define ACPI_USE_NATIVE_DIVIDE          /* Has native 64-bit integer support */

 #define ACPI_USE_NATIVE_MATH64          /* Has native 64-bit integer support */

-/*

- * In the case of the Itanium Processor Family (IPF), the hardware does not

- * support misaligned memory transfers. Set the MISALIGNMENT_NOT_SUPPORTED

- * flag to indicate that special precautions must be taken to avoid alignment

- * faults. (IA64 or ia64 is currently used by existing compilers to indicate

- * IPF.)

- *

- * Note: EM64T and other X86-64 processors support misaligned transfers,

- * so there is no need to define this flag.

- */

-#if defined (__IA64__) || defined (__ia64__)

-#define ACPI_MISALIGNMENT_NOT_SUPPORTED

-#endif

-

 /*******************************************************************************

  *