[RFC v4 2/6] UefiCpuPkg/CpuExceptionHandlerLib: Export GetPdbFileName()

[Paulo Alcantara <paulo@paulo.ac>]

This function will be used by both IA32 and X64 exception handling in
order to print out image module names during stack unwinding.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Paulo Alcantara <paulo@paulo.ac>
---
 UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c       | 60 +++++++++++++++++++-
 UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h       | 14 +++++
 UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchExceptionHandler.c | 59 -------------------
 3 files changed, 73 insertions(+), 60 deletions(-)

diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c
index dbfaae1d30..f62ab8c48c 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.c
@@ -54,6 +54,11 @@ CONST CHAR8 *mExceptionNameStr[] = {
 
 #define EXCEPTION_KNOWN_NAME_NUM  (sizeof (mExceptionNameStr) / sizeof (CHAR8 *))
 
+//
+// Unknown PDB file name
+//
+GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8 *mUnknownPdbFileName = "????";
+
 /**
   Get ASCII format string exception name by exception type.
 
@@ -177,4 +182,57 @@ ReadAndVerifyVectorInfo (
     VectorInfo ++;
   }
   return EFI_SUCCESS;
-}
\ No newline at end of file
+}
+
+/**
+  Get absolute path and file name of PDB file in PE/COFF image.
+
+  @param[in]  ImageBase            Base address of PE/COFF image.
+  @param[out] PdbAbsoluteFilePath  Absolute path of PDB file.
+  @param[out] PdbFileName          File name of PDB file.
+**/
+VOID
+GetPdbFileName (
+  IN  UINTN    ImageBase,
+  OUT CHAR8    **PdbAbsoluteFilePath,
+  OUT CHAR8    **PdbFileName
+  )
+{
+  VOID   *PdbPointer;
+  CHAR8  *Str;
+
+  //
+  // Get PDB file name from PE/COFF image
+  //
+  PdbPointer = PeCoffLoaderGetPdbPointer ((VOID *)ImageBase);
+  if (PdbPointer == NULL) {
+    //
+    // No PDB file name found. Set it to an unknown file name.
+    //
+    *PdbFileName = (CHAR8 *)mUnknownPdbFileName;
+    if (PdbAbsoluteFilePath != NULL) {
+      *PdbAbsoluteFilePath = NULL;
+    }
+  } else {
+    //
+    // Get file name portion out of PDB file in PE/COFF image
+    //
+    Str = (CHAR8 *)((UINTN)PdbPointer +
+                    AsciiStrLen ((CHAR8 *)PdbPointer) - sizeof *Str);
+    for (; *Str != '/' && *Str != '\\'; Str--) {
+      ;
+    }
+
+    //
+    // Set PDB file name (also skip trailing path separator: '/' or '\\')
+    //
+    *PdbFileName = Str + 1;
+
+    if (PdbAbsoluteFilePath != NULL) {
+      //
+      // Set absolute file path of PDB file
+      //
+      *PdbAbsoluteFilePath = PdbPointer;
+    }
+  }
+}
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
index e10d9379d5..64c7094513 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/CpuExceptionCommon.h
@@ -327,5 +327,19 @@ AsmGetTssTemplateMap (
   OUT EXCEPTION_HANDLER_TEMPLATE_MAP  *AddressMap
   );
 
+/**
+  Get absolute path and file name of PDB file in PE/COFF image.
+
+  @param[in]  ImageBase            Base address of PE/COFF image.
+  @param[out] PdbAbsoluteFilePath  Absolute path of PDB file.
+  @param[out] PdbFileName          File name of PDB file.
+**/
+VOID
+GetPdbFileName (
+  IN  UINTN    ImageBase,
+  OUT CHAR8    **PdbAbsoluteFilePath,
+  OUT CHAR8    **PdbFileName
+  );
+
 #endif
 
diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchExceptionHandler.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchExceptionHandler.c
index 19bfaa329a..d3a3878b3d 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchExceptionHandler.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ArchExceptionHandler.c
@@ -14,11 +14,6 @@
 
 #include "CpuExceptionCommon.h"
 
-//
-// Unknown PDB file name
-//
-GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8 *mUnknownPdbFileName = "????";
-
 /**
   Return address map of exception handler template so that C code can generate
   exception tables.
@@ -403,60 +398,6 @@ DumpCpuContext (
     );
 }
 
-/**
-  Get absolute path and file name of PDB file in PE/COFF image.
-
-  @param[in]  ImageBase            Base address of PE/COFF image.
-  @param[out] PdbAbsoluteFilePath  Absolute path of PDB file.
-  @param[out] PdbFileName          File name of PDB file.
-**/
-STATIC
-VOID
-GetPdbFileName (
-  IN  UINTN    ImageBase,
-  OUT CHAR8    **PdbAbsoluteFilePath,
-  OUT CHAR8    **PdbFileName
-  )
-{
-  VOID   *PdbPointer;
-  CHAR8  *Str;
-
-  //
-  // Get PDB file name from PE/COFF image
-  //
-  PdbPointer = PeCoffLoaderGetPdbPointer ((VOID *)ImageBase);
-  if (PdbPointer == NULL) {
-    //
-    // No PDB file name found. Set it to an unknown file name.
-    //
-    *PdbFileName = (CHAR8 *)mUnknownPdbFileName;
-    if (PdbAbsoluteFilePath != NULL) {
-      *PdbAbsoluteFilePath = NULL;
-    }
-  } else {
-    //
-    // Get file name portion out of PDB file in PE/COFF image
-    //
-    Str = (CHAR8 *)((UINTN)PdbPointer +
-                    AsciiStrLen ((CHAR8 *)PdbPointer) - sizeof *Str);
-    for (; *Str != '/' && *Str != '\\'; Str--) {
-      ;
-    }
-
-    //
-    // Set PDB file name (also skip trailing path separator: '/' or '\\')
-    //
-    *PdbFileName = Str + 1;
-
-    if (PdbAbsoluteFilePath != NULL) {
-      //
-      // Set absolute file path of PDB file
-      //
-      *PdbAbsoluteFilePath = PdbPointer;
-    }
-  }
-}
-
 /**
   Dump stack contents.
 
-- 
2.14.3