REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4352

Implemented dumping of the Image Execution Table using Dmem.c

Cc: Ray Ni <ray.ni@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Signed-off-by: Sam Kaynor <Sam.Kaynor@arm.com>
---
 ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c                         | 139 ++++++++++++++++++++
 ShellPkg/Library/UefiShellDebug1CommandsLib/UefiShellDebug1CommandsLib.uni |   3 +
 2 files changed, 142 insertions(+)

diff --git a/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c b/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c
index 1ae7b1f3d85c..5b0730b75268 100644
--- a/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c
+++ b/ShellPkg/Library/UefiShellDebug1CommandsLib/Dmem.c
@@ -138,6 +138,142 @@ DisplayRtProperties (
   return (ShellStatus);
 }
 
+/**
+  Retrieve the ImageExecutionTable Entry ImageName from Device Path
+
+  @param[in] Address    The pointer to the ImageExecutionTable.
+**/
+EFI_STATUS
+GetBaseName (
+  IN  CHAR16          *FileName,
+  OUT CHAR16          **BaseName
+  )
+{
+  UINT32              StrLen;
+  CHAR16              *StrTail;
+
+  StrLen = StrSize(FileName);
+
+  for (StrTail = FileName + StrLen - 1; StrTail != FileName && *StrTail != L'\\'; StrTail--) {
+  }
+
+  if (StrTail == FileName) {
+    return EFI_NOT_FOUND;
+  }
+  *BaseName = StrTail+1;
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Retrieve the ImageExecutionTable entries
+
+  @param[in] Address    The pointer to the ImageExecutionTable.
+**/
+EFI_STATUS
+GetImageExecutionInfo (
+  IN UINT64 Address
+  )
+{
+  EFI_STATUS Status;
+  EFI_IMAGE_EXECUTION_INFO       *InfoPtr;
+  VOID                           *ptr;
+  CHAR16                         *ImagePath;
+  CHAR16                         *ImageName;
+  UINTN                          *NumberOfImages;
+  CHAR16                         *ActionType;
+
+  Status = EfiGetSystemConfigurationTable (&gEfiImageSecurityDatabaseGuid, &ptr);
+
+  NumberOfImages = ptr;
+
+  ptr += sizeof(NumberOfImages);
+
+  for (int Image = 0; Image < *NumberOfImages; Image++) {
+    InfoPtr = ptr;
+    ImagePath = ptr + sizeof(EFI_IMAGE_EXECUTION_INFO);
+
+    GetBaseName(ImagePath,&ImageName);
+
+    switch(InfoPtr->Action) {
+      case EFI_IMAGE_EXECUTION_AUTHENTICATION:
+        ActionType = L"AUTHENTICATION";
+        break;
+      case EFI_IMAGE_EXECUTION_AUTH_UNTESTED:
+        ActionType = L"AUTHENTICATION UNTESTED";
+        break;
+      case EFI_IMAGE_EXECUTION_AUTH_SIG_FAILED:
+        ActionType = L"AUTHENTICATION SIGNATURE FAILED";
+        break;
+      case EFI_IMAGE_EXECUTION_AUTH_SIG_PASSED:
+        ActionType = L"AUTHENTICATION SIGNATURE PASSED";
+        break;
+      case EFI_IMAGE_EXECUTION_AUTH_SIG_NOT_FOUND:
+        ActionType = L"AUTHENTICATION SIGNATURE NOT FOUND";
+        break;
+      case EFI_IMAGE_EXECUTION_AUTH_SIG_FOUND:
+        ActionType = L"AUTHENTICATION SIGNATURE FOUND";
+        break;
+      case EFI_IMAGE_EXECUTION_POLICY_FAILED:
+        ActionType = L"POILCY FAILED";
+        break;
+      case EFI_IMAGE_EXECUTION_INITIALIZED:
+        ActionType = L"INITIALIZED";
+        break;
+      default:
+        ActionType = L"invalid action";
+    }
+
+    ShellPrintHiiEx(
+      -1,
+      -1,
+      NULL,
+      STRING_TOKEN (STR_DMEM_IMG_EXE_ENTRY),
+      gShellDebug1HiiHandle,
+      ImageName,
+      ActionType
+    );
+
+    ptr += InfoPtr->InfoSize;
+  }
+
+  return Status;
+}
+
+/**
+  Display the ImageExecutionTable entries
+
+  @param[in] Address    The pointer to the ImageExecutionTable.
+**/
+SHELL_STATUS
+DisplayImageExecutionEntries (
+  IN UINT64 Address
+  )
+{
+  EFI_IMAGE_EXECUTION_INFO_TABLE *ImageExecutionTable;
+  SHELL_STATUS    ShellStatus;
+  EFI_STATUS      Status;
+
+  ShellStatus = SHELL_SUCCESS;
+
+  if (Address != 0) {
+    Status = EfiGetSystemConfigurationTable (&gEfiImageSecurityDatabaseGuid, (VOID **)&ImageExecutionTable);
+    if (EFI_ERROR (Status)) {
+      ShellStatus = SHELL_NOT_FOUND;
+      ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_DMEM_ERR_GET_FAIL), gShellDebug1HiiHandle, L"ImageExecutionTable");
+    } else {
+      ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_DMEM_IMG_EXE_TABLE), gShellDebug1HiiHandle);
+      Status = GetImageExecutionInfo(Address);
+    }
+  } else {
+    ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_DMEM_ERR_NOT_FOUND), gShellDebug1HiiHandle, L"ImageExecutionTable");
+  }
+
+  return (ShellStatus);
+}
+
+
+
 STATIC CONST SHELL_PARAM_ITEM  ParamList[] = {
   { L"-mmio", TypeFlag },
   { L"-verbose", TypeFlag },
@@ -368,6 +504,9 @@ ShellCommandRunDmem (
           if (ShellStatus == SHELL_SUCCESS) {
             ShellStatus = DisplayRtProperties (RtPropertiesTableAddress);
           }
+          if (ShellStatus == SHELL_SUCCESS) {
+            ShellStatus = DisplayImageExecutionEntries (ImageExecutionTableAddress);
+          }
         }
 
       } else {
diff --git a/ShellPkg/Library/UefiShellDebug1CommandsLib/UefiShellDebug1CommandsLib.uni b/ShellPkg/Library/UefiShellDebug1CommandsLib/UefiShellDebug1CommandsLib.uni
index 299b0ba44f31..eee9384e3ffb 100644
--- a/ShellPkg/Library/UefiShellDebug1CommandsLib/UefiShellDebug1CommandsLib.uni
+++ b/ShellPkg/Library/UefiShellDebug1CommandsLib/UefiShellDebug1CommandsLib.uni
@@ -144,6 +144,9 @@
                                                   "  UPDATE_CAPSULE                   %d\r\n"
                                                   "  QUERY_CAPSULE_CAPABILITIES       %d\r\n"
                                                   "  QUERY_VARIABLE_INFO              %d\r\n"
+#string STR_DMEM_IMG_EXE_TABLE    #language en-US "\r\nImage Execution Table\r\n"
+                                                  "----------------------------------------\r\n"
+#string STR_DMEM_IMG_EXE_ENTRY    #language en-US "%s: %s\r\n"
 #string STR_DMEM_ERR_NOT_FOUND    #language en-US "\r\n%H%s%N: Table address not found.\r\n"
 #string STR_DMEM_ERR_GET_FAIL     #language en-US "\r\n%H%s%N: Unable to get table information.\r\n"
 
-- 
2.25.1