Re: ld.gold: internal error in make_view, at fileread.cc:458

[Ian Lance Taylor]

Arkadiusz Miskiewicz <ar...@maven.pl> writes:

> uClibc does one test and checks exit status. For gold it causes internal 
> error.
>
> binutils 2.21.51.0.9 on x86_64 linux.
>
> $ ld.gold --hash-style=gnu -o /dev/null -b binary /dev/null
> ld.gold: internal error in make_view, at fileread.cc:458
> zsh: exit 1     ld.gold --hash-style=gnu -o /dev/null -b binary /dev/null
>
> $ ld.bfd --hash-style=gnu -o /dev/null -b binary /dev/null
> ld.bfd: warning: cannot find entry symbol _start; not setting start address

Thanks for the bug report.  Fixed with this patch, committed to both
mainline and the 2.21 branch.

Ian


2011-05-29  Ian Lance Taylor  <i...@google.com>

        * binary.cc (Binary_to_elf::sized_convert): Don't crash if the
        binary input file is empty.



Index: binary.cc
===================================================================
RCS file: /cvs/src/src/gold/binary.cc,v
retrieving revision 1.4
diff -p -u -r1.4 binary.cc
--- binary.cc	7 Feb 2009 01:03:32 -0000	1.4
+++ binary.cc	29 May 2011 17:08:52 -0000
@@ -132,7 +132,11 @@ Binary_to_elf::sized_convert(const Task*
     }
 
   section_size_type filesize = convert_to_section_size_type(f.filesize());
-  const unsigned char* fileview = f.get_view(0, 0, filesize, false, false);
+  const unsigned char* fileview;
+  if (filesize == 0)
+    fileview = NULL;
+  else
+    fileview = f.get_view(0, 0, filesize, false, false);
 
   unsigned int align;
   if (size == 32)
@@ -223,10 +227,13 @@ Binary_to_elf::sized_convert(const Task*
 					       shstrtab.get_strtab_size(),
 					       0, 0, 1, 0, &pout);
 
-  memcpy(pout, fileview, filesize);
-  pout += filesize;
-  memset(pout, 0, aligned_filesize - filesize);
-  pout += aligned_filesize - filesize;
+  if (filesize > 0)
+    {
+      memcpy(pout, fileview, filesize);
+      pout += filesize;
+      memset(pout, 0, aligned_filesize - filesize);
+      pout += aligned_filesize - filesize;
+    }
 
   this->write_symbol<size, big_endian>("", &strtab, 0, 0, &pout);
   this->write_symbol<size, big_endian>(start_symbol_name, &strtab, 0, 1,

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