[lld] r327645 - Add a comment about ELF spec and the symbol table's sh_info.

[Rui Ueyama via llvm-commits]

Author: ruiu
Date: Thu Mar 15 10:10:50 2018
New Revision: 327645

URL: http://llvm.org/viewvc/llvm-project?rev=327645&view=rev
Log:
Add a comment about ELF spec and the symbol table's sh_info.

Modified:
    lld/trunk/ELF/InputFiles.cpp

Modified: lld/trunk/ELF/InputFiles.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/ELF/InputFiles.cpp?rev=327645&r1=327644&r2=327645&view=diff
==============================================================================
--- lld/trunk/ELF/InputFiles.cpp (original)
+++ lld/trunk/ELF/InputFiles.cpp Thu Mar 15 10:10:50 2018
@@ -866,6 +866,10 @@ template <class ELFT> void SharedFile<EL
       continue;
     }
 
+    // ELF spec requires that all local symbols precede weak or global
+    // symbols in each symbol table, and the index of first non-local symbol
+    // is stored to sh_info. If a local symbol appears after some non-local
+    // symbol, that's a violation of the spec.
     if (Sym.getBinding() == STB_LOCAL) {
       warn("found local symbol '" + Name +
            "' in global part of symbol table in file " + toString(this));