Fix reloc type produced by ilasm in PE64 images (#111212)

Fixes #111189

Author: jkotas

src/coreclr/dlls/mscorpe/pewriter.cpp

@@ -13,8 +13,8 @@
 #include "log.h"
 
 static const char* const RelocName[] = {
-    "Absolute", "Unk1",    "Unk2",    "HighLow", "Unk4", "MapToken",
-    "Relative", "FilePos", "CodeRel", "Dir64", "AbsTag" };
+    "Absolute", "Unk1",    "Unk2",    "HighLow", "Unk4",  "MapToken",
+    "Relative", "FilePos", "CodeRel", "Unk3",    "Dir64", "AbsTag" };
 static const char RelocSpaces[] = "        ";
 
 #endif

src/coreclr/inc/corpriv.h

@@ -314,7 +314,7 @@ typedef enum {
 
     // generate a .reloc for a pointer sized location,
     // This is transformed into BASED_HIGHLOW or BASED_DIR64 based on the platform
-    srRelocHighLow = 3,
+    srRelocHighLow = IMAGE_REL_BASED_HIGHLOW,
 
     // generate a .reloc for the top 16-bits of a 32 bit number, where the
     // bottom 16 bits are included in the next word in the .reloc table
@@ -335,7 +335,7 @@ typedef enum {
     srRelocCodeRelative,
 
     // generate a .reloc for a 64 bit address
-    srRelocDir64,
+    srRelocDir64 = IMAGE_REL_BASED_DIR64,
 
     // generate a 30-bit section-relative reloc, used for tagged pointer values
     srRelocAbsoluteTagged,