[edk2-devel] [PATCH] MdePkg: Fix AsmReadSs() with GCC toolchain

Satoshi Tanda tanda.sat at gmail.com
Mon May 24 04:50:18 UTC 2021


REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3325

AsmReadSs() in Ia32/GccInlinePriv.c and X64/GccInlinePriv.c return the
DS segment selector value instead of SS.

Signed-off-by: Satoshi Tanda <tanda.sat at gmail.com>
---
 MdePkg/Library/BaseLib/Ia32/GccInlinePriv.c | 2 +-
 MdePkg/Library/BaseLib/X64/GccInlinePriv.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/MdePkg/Library/BaseLib/Ia32/GccInlinePriv.c b/MdePkg/Library/BaseLib/Ia32/GccInlinePriv.c
index 40e8c08beb..b8b5b85e73 100644
--- a/MdePkg/Library/BaseLib/Ia32/GccInlinePriv.c
+++ b/MdePkg/Library/BaseLib/Ia32/GccInlinePriv.c
@@ -902,7 +902,7 @@ AsmReadSs (
   UINT16  Data;
 
   __asm__ __volatile__ (
-    "mov  %%ds, %0"
+    "mov  %%ss, %0"
     :"=a" (Data)
     );
 
diff --git a/MdePkg/Library/BaseLib/X64/GccInlinePriv.c b/MdePkg/Library/BaseLib/X64/GccInlinePriv.c
index 244bd62ee6..c3feb9f922 100644
--- a/MdePkg/Library/BaseLib/X64/GccInlinePriv.c
+++ b/MdePkg/Library/BaseLib/X64/GccInlinePriv.c
@@ -911,7 +911,7 @@ AsmReadSs (
   UINT16  Data;
 
   __asm__ __volatile__ (
-    "mov  %%ds, %0"
+    "mov  %%ss, %0"
     :"=a" (Data)
     );
 
-- 
2.25.1



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