http://sourceware.org/bugzilla/show_bug.cgi?id=15056
Bug #: 15056
Summary: gld 2.23.1 mishandles R_SPARC_TLS_LDM_CALL
Product: binutils
Version: 2.23
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: unassig...@sourceware.org
ReportedBy: r...@techfak.uni-bielefeld.de
CC: da...@davemloft.net, ebotca...@gcc.gnu.org
Classification: Unclassified
Host: sparc*-*-solaris2*
After upgrading my binutils installation from 2.22 to 2.23.1, many (all?) C++
EH tests on Solaris/SPARC started failing like this:
Program received signal SIGILL, Illegal instruction.
[Switching to Thread 1 (LWP 1)]
0xff2e4f60 in __CTOR_LIST__ ()
from ../../../sparc-sun-solaris2.11/libstdc++-v3/src/.libs/libstdc++.so.6
(gdb) where
#0 0xff2e4f60 in __CTOR_LIST__ ()
from ../../../sparc-sun-solaris2.11/libstdc++-v3/src/.libs/libstdc++.so.6
#1 0xff249618 in __cxxabiv1::__cxa_get_globals ()
at /vol/gcc/src/hg/trunk/local/libstdc++-v3/libsupc++/eh_globals.cc:63
#2 0xff248660 in __cxxabiv1::__cxa_allocate_exception (thrown_size=134464)
at /vol/gcc/src/hg/trunk/local/libstdc++-v3/libsupc++/eh_alloc.cc:136
#3 0x000108d4 in h ()
at /vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/eh/alias1.C:25
#4 0x00010918 in main ()
at /vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/eh/alias1.C:34
If I relink libstdc++.so with gld 2.22 (no other changes), the test passes.
Looking at the __cxa_get_globals call site with gdb, I find (with gld 2.23.1):
=> 0xff249610 <__cxxabiv1::__cxa_get_globals()+32>: call 0xff2e4f60
0xff249614 <__cxxabiv1::__cxa_get_globals()+36>: xor %i0, 0, %i0
(gdb)
1: x/i $pc
=> 0xff249614 <__cxxabiv1::__cxa_get_globals()+36>: xor %i0, 0, %i0
(gdb)
0xff2e4f60 in __CTOR_LIST__ () from
../../../sparc-sun-solaris2.11/libstdc++-v3/src/.libs/save/libstdc++.so.6
1: x/i $pc
=> 0xff2e4f60: unknown
Instead, with libstdc++.so relinked with gld 2.22, I see
=> 0xff2496a4 <__cxxabiv1::__cxa_get_globals()+32>: call 0xff2e987c
<__tls_get_addr@plt>
0xff2496a8 <__cxxabiv1::__cxa_get_globals()+36>: xor %i0, 0, %i0
In the input object (eh_globals.o), elfdump -r shows (mangled and unmangled
respectively):
R_SPARC_TLS_LDM_CALL 0x20 0 .rela.text.__c
_ZZN12_GLOBAL__
N_110get_globalEvE6global
R_SPARC_TLS_LDM_CALL 0x20 0 .rela.text.(char) (anonymous
n
amespace)::get_global()::global
I don't yet have an idea what gld change is causing this, but it's a gld 2.23
regression that makes binutils 2.23 unusable on Solaris/SPARC.
Rainer
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