linux-syscall-support: pull in latest version

src/common/linux/memory_mapped_file.cc

 // Copyright (c) 2011, Google Inc.
 // 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
@@ skipping 69 matching lines @@
   // Strangely file size can be negative, but we check above that it is not.
   size_t file_len = static_cast<size_t>(st.st_size);
   // If the file does not extend beyond the offset, simply use an empty
   // MemoryRange and return true. Don't bother to call mmap()
   // even though mmap() can handle an empty file on some platforms.
   if (offset >= file_len) {
     sys_close(fd);
     return true;
   }
 
-#if defined(__x86_64__) || defined(__aarch64__) || \
-   (defined(__mips__) && _MIPS_SIM == _ABI64)
   void* data = sys_mmap(NULL, file_len, PROT_READ, MAP_PRIVATE, fd, offset);
-#else
-  if ((offset & 4095) != 0) {
-    // Not page aligned.
-    sys_close(fd);
-    return false;
-  }
-  void* data = sys_mmap2(
-      NULL, file_len, PROT_READ, MAP_PRIVATE, fd, offset >> 12);
-#endif
   sys_close(fd);
   if (data == MAP_FAILED) {
     return false;
   }
 
   content_.Set(data, file_len - offset);
   return true;
 }
 
 void MemoryMappedFile::Unmap() {
   if (content_.data()) {
     sys_munmap(const_cast<uint8_t*>(content_.data()), content_.length());
     content_.Set(NULL, 0);
   }
 }
 
 }  // namespace google_breakpad