On Wed, Jun 26, 2013 at 10:59:24PM +0200, Dimitry Andric wrote: > On Jun 26, 2013, at 22:45, Konstantin Belousov <kostik...@gmail.com> wrote: > > On Wed, Jun 26, 2013 at 09:26:09PM +0200, Dimitry Andric wrote: > >> This revision is not in 9.1-RELEASE, but it is in 9-STABLE, so the > >> problem can also be reproduced there. > > ... > >> This is roughly gcc 4.3.0 and later. For example, gcc 4.8 generates: > > I just tested the thing with gcc 4.8 on up to date stable/9 and HEAD. > > In both cases, major tom did not fail, at least not in the peculiar way. > > The gcc-generated code passed the PLT address of the corresponding > > destructor. > > That is strange, did you compile the main program with -fPIC? That is > the problem case. If you don't compile the main program with -fPIC, the > problem will indeed not occur.
I just used the Makefile provided by the earlier message, and it contains the -fPIC flag (which is strange thing to do on its own, binaries should use -fPIE). This is how the registration for the outer dtr looks for me, gcc 4.8.1/i386: 0x08048763 <+42>: call 0x8048520 <_ZN5OuterC1Ev@plt> 0x08048768 <+47>: lea 0x28(%ebx),%eax 0x0804876e <+53>: mov %eax,0x8(%esp) 0x08048772 <+57>: lea 0x34(%ebx),%eax 0x08048778 <+63>: mov %eax,0x4(%esp) 0x0804877c <+67>: mov -0x4(%ebx),%eax 0x08048782 <+73>: mov %eax,(%esp) 0x08048785 <+76>: call 0x8048500 <__cxa_atexit@plt> ebx was set up earlier as the GOT pointer.
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