crazy linker: convert relocation unpacking to Android style.

third_party/android_crazy_linker/src/src/crazy_linker_elf_loader.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "crazy_linker_elf_loader.h"
 
 #include <limits.h>  // For PAGE_SIZE and PAGE_MASK
 
 #include "crazy_linker_debug.h"
 #include "linker_phdr.h"
@@ skipping 177 matching lines @@
 // it overlaps an existing, possibly system, mapping.
 bool ElfLoader::ReserveAddressSpace(Error* error) {
   ELF::Addr min_vaddr;
   load_size_ =
       phdr_table_get_load_size(phdr_table_, phdr_num_, &min_vaddr, NULL);
   if (load_size_ == 0) {
     error->Set("No loadable segments");
     return false;
   }
 
-  uint8_t* addr = reinterpret_cast<uint8_t*>(min_vaddr);
+  uint8_t* addr = NULL;
   int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS;
 
   // Support loading at a fixed address.
   if (wanted_load_address_) {
     addr = static_cast<uint8_t*>(wanted_load_address_);
   }
 
   LOG("%s: address=%p size=%p\n", __FUNCTION__, addr, load_size_);
   void* start = mmap(addr, load_size_, PROT_NONE, mmap_flags, -1, 0);
   if (start == MAP_FAILED) {
@@ skipping 186 matching lines @@
       if (zeromap == MAP_FAILED) {
         error->Format("Could not zero-fill gap: %s", strerror(errno));
         return false;
       }
     }
   }
   return true;
 }
 
 }  // namespace crazy