Fix compilation failure on ARM in r12685.

src/gdb-jit.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 659 matching lines @@
 
 
   void WriteHeader(Writer* w) {
     ASSERT(w->position() == 0);
     Writer::Slot<ELFHeader> header = w->CreateSlotHere<ELFHeader>();
 #if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_ARM)
     const uint8_t ident[16] =
         { 0x7f, 'E', 'L', 'F', 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 #elif defined(V8_TARGET_ARCH_X64)
     const uint8_t ident[16] =
-        { 0x7f, 'E', 'L', 'F', 2, 1, 1, 0, 0, 0 , 0, 0, 0, 0, 0, 0};
+        { 0x7f, 'E', 'L', 'F', 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 #else
 #error Unsupported target architecture.
 #endif
     memcpy(header->ident, ident, 16);
     header->type = 1;
 #if defined(V8_TARGET_ARCH_IA32)
     header->machine = 3;
 #elif defined(V8_TARGET_ARCH_X64)
     // Processor identification value for x64 is 62 as defined in
     //    System V ABI, AMD64 Supplement
@@ skipping 412 matching lines @@
       w->WriteULEB128(2);
       w->WriteString(desc_->name());
       w->Write<intptr_t>(desc_->CodeStart());
       w->Write<intptr_t>(desc_->CodeStart() + desc_->CodeSize());
       Writer::Slot<uint32_t> fb_block_size = w->CreateSlotHere<uint32_t>();
       uintptr_t fb_block_start = w->position();
 #if defined(V8_TARGET_ARCH_IA32)
       w->Write<uint8_t>(DW_OP_reg5);  // The frame pointer's here on ia32
 #elif defined(V8_TARGET_ARCH_X64)
       w->Write<uint8_t>(DW_OP_reg6);  // and here on x64.
+#elif defined(V8_TARGET_ARCH_ARM)
+      UNIMPLEMENTED();
 #else
 #error Unsupported target architecture.
 #endif
       fb_block_size.set(static_cast<uint32_t>(w->position() - fb_block_start));
 
       int params = scope->num_parameters();
       int slots = scope->num_stack_slots();
       int context_slots = scope->ContextLocalCount();
       // The real slot ID is internal_slots + context_slot_id.
       int internal_slots = Context::MIN_CONTEXT_SLOTS;
@@ skipping 1037 matching lines @@
   ScopedLock lock(mutex.Pointer());
   ASSERT(!IsLineInfoTagged(line_info));
   HashMap::Entry* e = GetEntries()->Lookup(code, HashForCodeObject(code), true);
   ASSERT(e->value == NULL);
   e->value = TagLineInfo(line_info);
 }
 
 
 } }  // namespace v8::internal
 #endif