UefiCpuPkg/PiSmmCpuDxeSmm: Cast the return value of GetPageTableBase().

[edk2] [PATCH] UefiCpuPkg/PiSmmCpuDxeSmm: Cast the return value of GetPageTableBase().

Posted by Marvin Häuser 7 years, 5 months ago

The value returned by GetPageTableBase() is of type UINT64, which is
implicitely casted to UINTN by the return statement. To purge the
'possible loss of data' warning on 32-bit platforms, with this patch,
the value is casted to UINTN before returning.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marvin Haeuser <Marvin.Haeuser@outlook.com>
---
 UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
index a535389c26ce..009d8eb01347 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
@@ -1,6 +1,6 @@
 /** @file
 
-Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017, 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
 which accompanies this distribution.  The full text of the license may be found at
@@ -39,7 +39,7 @@ GetPageTableBase (
   VOID
   )
 {
-  return (AsmReadCr3 () & PAGING_4K_ADDRESS_MASK_64);
+  return (UINTN)(AsmReadCr3 () & PAGING_4K_ADDRESS_MASK_64);
 }
 
 /**
-- 
2.12.2.windows.2

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Re: [edk2] [PATCH] UefiCpuPkg/PiSmmCpuDxeSmm: Cast the return value of GetPageTableBase().

Posted by Fan, Jeff 7 years, 5 months ago

Reviewed-by: Jeff Fan <jeff.fan@intel.com>

-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Marvin Häuser
Sent: Friday, July 21, 2017 6:20 PM
To: edk2-devel@lists.01.org
Cc: Fan, Jeff
Subject: [edk2] [PATCH] UefiCpuPkg/PiSmmCpuDxeSmm: Cast the return value of GetPageTableBase().

The value returned by GetPageTableBase() is of type UINT64, which is implicitely casted to UINTN by the return statement. To purge the 'possible loss of data' warning on 32-bit platforms, with this patch, the value is casted to UINTN before returning.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Marvin Haeuser <Marvin.Haeuser@outlook.com>
---
 UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
index a535389c26ce..009d8eb01347 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
@@ -1,6 +1,6 @@
 /** @file
 
-Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2017, 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  which accompanies this distribution.  The full text of the license may be found at @@ -39,7 +39,7 @@ GetPageTableBase (
   VOID
   )
 {
-  return (AsmReadCr3 () & PAGING_4K_ADDRESS_MASK_64);
+  return (UINTN)(AsmReadCr3 () & PAGING_4K_ADDRESS_MASK_64);
 }
 
 /**
--
2.12.2.windows.2

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