Re-establish mips basic infrastructure.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index b66421a2e72a1cb97137d45d66bbba441ac41fb0..442ffaadb7fe12954b32a4e7af4df64c11f2a6dc 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -358,6 +358,17 @@ class RelocInfo BASE_EMBEDDED {
   byte* pc_;
   Mode rmode_;
   intptr_t data_;
+  // Code and Embedded Object pointers in mips are stored split across

[Søren Thygesen Gjesse, 2011/03/21 16:05:19]

I don't like these platform dependent members here - if this is currently
unavoidable they should at least be inside #ifdef/#endif.

[Paul Lind, 2011/03/23 01:55:43]

I have removed this for now, since relocation is not needed for the
assembler/sim tests. I have commented out the access to these members from
assembler-mips-inl.h.

Going forward, I will submit a single commit with our approach to relocation,
and maybe you can suggest a cleaner way than this to handle it.

+  // two consecutive 32-bit instructions. Heap management routines expect
+  // to access these pointers indirectly. The following location provides
+  // a place for these pointers to exist natually when accessed via the
+  // Iterator. Its address is returned by RelocInfo::target_object_address().
+  Object *reconstructed_obj_ptr_;
+  // External-reference pointers may also be split across instruction-pairs
+  // in mips, but are accessed via indirect pointers. This location provides
+  // a place for that pointer to exist naturally. Its address is returned by
+  // RelocInfo::target_reference_address().
+  Address reconstructed_adr_ptr_;
   friend class RelocIterator;
 };