[Lldb-commits] [PATCH] D19252: Handle invalid values of PLT entry size generated by ld + gcc on arm linux targets.

Muhammad Omair Javaid via lldb-commits lldb-commits at lists.llvm.org
Mon Apr 25 06:51:29 PDT 2016

This revision was automatically updated to reflect the committed changes.
Closed by commit rL267405: Handle invalid values of PLT entry size generated by linker (authored by omjavaid).

Changed prior to commit:




Index: lldb/trunk/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
--- lldb/trunk/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
+++ lldb/trunk/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
@@ -2610,7 +2610,10 @@
     elf_xword plt_entsize = plt_hdr->sh_addralign ?
         llvm::alignTo (plt_hdr->sh_entsize, plt_hdr->sh_addralign) : plt_hdr->sh_entsize;
-    if (plt_entsize == 0)
+    // Some linkers e.g ld for arm, fill plt_hdr->sh_entsize field incorrectly.
+    // PLT entries relocation code in general requires multiple instruction and
+    // should be greater than 4 bytes in most cases. Try to guess correct size just in case.
+    if (plt_entsize <= 4)
         // The linker haven't set the plt_hdr->sh_entsize field. Try to guess the size of the plt
         // entries based on the number of entries and the size of the plt section with the

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