diff --git a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
--- a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
+++ b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
@@ -2258,6 +2258,8 @@
         symbol_size_valid,              // Symbol size is valid
         has_suffix,                     // Contains linker annotations?
         flags);                         // Symbol flags.
+    if (symbol.getBinding() == STB_WEAK)
+      dc_symbol.SetIsWeak(true);
     symtab->AddSymbol(dc_symbol);
   }
   return i;
diff --git a/lldb/source/Symbol/Symtab.cpp b/lldb/source/Symbol/Symtab.cpp
--- a/lldb/source/Symbol/Symtab.cpp
+++ b/lldb/source/Symbol/Symtab.cpp
@@ -928,7 +928,53 @@
         }
       }
 
+      // For each matching address range choose the most global symbol.
+      // Rewrite 'data' of all the less global symbols, Sort() below will
+      // discard those entries.
+      size_t b_ix;
+      for (size_t a_ix = 0; a_ix < num_entries; a_ix = b_ix) {
+        FileRangeToIndexMap::Entry &a = m_file_addr_to_index.GetEntryRef(a_ix);
+        for (b_ix = a_ix + 1; b_ix < num_entries; ++b_ix) {
+          FileRangeToIndexMap::Entry &b =
+              m_file_addr_to_index.GetEntryRef(b_ix);
+          if (a.GetRangeBase() != b.GetRangeBase() ||
+              a.GetByteSize() != b.GetByteSize())
+            break;
+        }
+        if (b_ix == a_ix + 1)
+          continue;
+        int val_max = -1;
+        FileRangeToIndexMap::Entry::DataType val_max_data;
+        for (size_t scan_ix = a_ix; scan_ix < b_ix; ++scan_ix) {
+          FileRangeToIndexMap::Entry &scan =
+              m_file_addr_to_index.GetEntryRef(scan_ix);
+          const Symbol &scan_symbol = *SymbolAtIndex(scan.data);
+          // Store to 'val' how much preferred is this symbol.
+          int val;
+          if (scan_symbol.IsExternal())
+            val = 3;
+          else if (scan_symbol.IsWeak())
+            val = 2;
+          else if (scan_symbol.IsDebug())
+            val = 0;
+          else
+            val = 1;
+          if (val > val_max) {
+            val_max = val;
+            val_max_data = scan.data;
+          }
+        }
+        // Set 'data' of the most preferred symbol to all symbols with the same
+        // address range.
+        for (size_t set_ix = a_ix; set_ix < b_ix; ++set_ix) {
+          FileRangeToIndexMap::Entry &set =
+              m_file_addr_to_index.GetEntryRef(set_ix);
+          set.data = val_max_data;
+        }
+      }
+
       // Sort again in case the range size changes the ordering
+      // Also discard duplicate 'data' from the selection above.
       m_file_addr_to_index.Sort();
     }
   }
diff --git a/lldb/test/Shell/SymbolFile/Inputs/symbol-binding.s b/lldb/test/Shell/SymbolFile/Inputs/symbol-binding.s
new file mode 100644
--- /dev/null
+++ b/lldb/test/Shell/SymbolFile/Inputs/symbol-binding.s
@@ -0,0 +1,22 @@
+        .text
+        .byte   0
+sizeless:
+sizeful:
+        .byte   0
+        .byte   0
+sizeend:
+        .size   sizeful, sizeend - sizeful
+        .byte   0
+global:
+globalX:
+        .globl  globalX
+        .byte   0
+weak:
+weakW:
+        .weak   weakW
+        .byte   0
+bothW:
+        .weak   bothW
+bothX:
+        .globl  bothX
+        .byte   0
diff --git a/lldb/test/Shell/SymbolFile/symbol-binding.test b/lldb/test/Shell/SymbolFile/symbol-binding.test
new file mode 100644
--- /dev/null
+++ b/lldb/test/Shell/SymbolFile/symbol-binding.test
@@ -0,0 +1,22 @@
+# Some targets do not have the .size directive.
+# RUN: %clang -target x86_64-unknown-unknown-elf %S/Inputs/symbol-binding.s -c -o %t.o
+# RUN: %lldb %t.o -s %s -o quit | FileCheck %s
+
+image lookup --address 4
+# CHECK: Summary: symbol-binding.test.tmp.o`globalX
+image lookup --address 5
+# CHECK: Summary: symbol-binding.test.tmp.o`weakW
+image lookup --address 6
+# CHECK: Summary: symbol-binding.test.tmp.o`bothX
+image dump symtab
+# CHECK:     Index   UserID DSX Type            File Address/Value Load Address       Size               Flags      Name
+# CHECK-NEXT:------- ------ --- --------------- ------------------ ------------------ ------------------ ---------- ----------------------------------
+# CHECK-NEXT:[    0]      1     Code            0x0000000000000004                    0x0000000000000001 0x00000000 global
+# CHECK-NEXT:[    1]      2     Code            0x0000000000000003                    0x0000000000000001 0x00000000 sizeend
+# CHECK-NEXT:[    2]      3     Code            0x0000000000000001                    0x0000000000000002 0x00000000 sizeful
+# CHECK-NEXT:[    3]      4     Code            0x0000000000000001                    0x0000000000000002 0x00000000 sizeless
+# CHECK-NEXT:[    4]      5     Code            0x0000000000000005                    0x0000000000000001 0x00000000 weak
+# CHECK-NEXT:[    5]      6     Code            0x0000000000000006                    0x0000000000000001 0x00000020 bothW
+# CHECK-NEXT:[    6]      7   X Code            0x0000000000000006                    0x0000000000000001 0x00000010 bothX
+# CHECK-NEXT:[    7]      8   X Code            0x0000000000000004                    0x0000000000000001 0x00000010 globalX
+# CHECK-NEXT:[    8]      9     Code            0x0000000000000005                    0x0000000000000001 0x00000020 weakW