Add call pseudo instruction

lib/Language/Elna/Architecture/RiscV.hs

@@ -150,6 +150,7 @@ data RelocationType
 data Instruction
     = Instruction BaseOpcode Type
     | RelocatableInstruction BaseOpcode RelocationType
+    | CallInstruction Text
     deriving Eq
 
 xRegister :: XRegister -> Word8
@@ -306,6 +307,10 @@ instruction :: Instruction -> ByteString.Builder.Builder
 instruction = \case
     (Instruction base instructionType) -> go base $ type' instructionType
     (RelocatableInstruction base instructionType) -> go base $ relocationType instructionType
+    (CallInstruction _) -> foldMap instruction
+        [ Instruction Auipc $ U RA 0
+        , Instruction Jalr $ I RA JALR RA 0
+        ]
   where
     go base instructionType
         = ByteString.Builder.word32LE