>Number:         13927
>Category:       misc
>Synopsis:       bug in binutils >= 2.11 prevents generating correct shared libraries
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Sep 11 05:01:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Michael Rauch
>Release:        1.5
>Organization:
>Environment:
System: NetBSD europa 1.5 NetBSD 1.5 (GENERIC) #1: Wed Nov 29 00:29:52 MET 2000 root@flambard:/usr/src/sys/arch/sparc/compile/GENERIC sparc


>Description:
A bug in binutils >= 2.11 prevents generating correct shared libraries and
causes the dynamic linker to fail while trying to resolve symbols. 

binutils 2.11.2 now also uses R_SPARC_UA32 relocations instead of only 
R_SPARC_32 relocations. Code in ld mishandles these relocations, making 
programs not run anymore:
$ ./prog 
./libclass.so: Undefined symbol "" (reloc type = 23, symnum = 9)

>How-To-Repeat:

Install binutils-2.11.2 from ftp.gnu.org, unpack the shell archive below 
and compile the two files with
$ g++ -fPIC -shared -o libclass.so class.cpp --save-temps
$ g++ -L. -R. -lclass -o prog prog.cpp --save-temps


# This is a shell archive.  Save it in a file, remove anything before
# this line, and then unpack it by entering "sh file".  Note, it may
# create directories; files and directories will be owned by you and
# have default permissions.
#
# This archive contains:
#
#       class.cpp
#       prog.cpp
#
echo x - class.cpp
sed 's/^X//' >class.cpp << 'END-of-class.cpp'
X/* class.cpp 
X */
X
Xvoid nothing() {
X}
X
END-of-class.cpp
echo x - prog.cpp
sed 's/^X//' >prog.cpp << 'END-of-prog.cpp'
X
Xint main() {
X
X     exit(0);
X}
X
X
END-of-prog.cpp
exit


>Fix:

Apply the following patch to binutils 2.11.2, which has also been 
sent back to the binutils maintainers:


--- /aux/binutils-2.11.2/bfd/elf32-sparc.c      Mon Jun 11 12:04:13 2001
+++ bfd/elf32-sparc.c   Mon Sep 10 18:15:11 2001
@@ -1478,7 +1478,7 @@
                }
              else
                {
-                 if (r_type == R_SPARC_32)
+                 if (r_type == R_SPARC_32 || r_type == R_SPARC_UA32)
                    {
                      outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
                      outrel.r_addend = relocation + rel->r_addend;


>Release-Note:
>Audit-Trail:
>Unformatted: