Re: Error creating a PIC EXECUTABLE in a POWER-PC Debian

[Michel Dänzer <daenzer@debian.org>]

On Mon, 2011-02-21 at 23:43 +0100, Stefano Bonifazi wrote: 
> Hi all!
>   I am reposting the previous problem, as after some investigation the 
> problem is more clear:there is some error creating a PIC EXECUTABLE in a 
> POWER-PC Debian6!
> 
> Even when creating the simplest code:
> int main() {}
> 
> compiling with "gcc -fPIC" and then linking with "gcc -Wl,-pie" produces 
> non PIC code:
> 
> checking all the linked object files (also those added by gcc) with 
> "readelf -d myobjectfile | fgrep TEXT" all seem to be PIC as nothing is 
> produced by the previous command.
> Oddly giving the command "readelf -d mypie_executable | fgrep TEXT" to 
> my final 'PIC' output executable I get: "0x00000016 (TEXTREL) 0x0"
> Then if I try to load the file with QEMU-USER I get: "error while 
> loading shared libraries: R_PPC_REL24 relocation at 0xb31f95a0 for 
> symbol `__libc_start_main' out of range" !!!
> 
> If I link with "-shared" all is fine and the library is PIC.. Also if I 
> create a normal executable, or a normal executable relocated at linker 
> time with "-Wl,-Ttext-segment=myaddress" all is fine..
> I think the linker goes crazy as I want a PIC executable not a library!
> 
> I am creating the binaries using Debian 6 kernel 2.6.32.5 powerpc 
> running in a qemu VM, with gcc 4.4.5-8, binutils 2.20.1 eglibc 2.11.2-10
> 
> I have outputs of dumps of objdump, readelf, and Map here:
> 
> http://cid-9d0dd0f6c6e22fe8.office.live.com/browse.aspx/Public/Developing/master-degree-project?uc=2
> 
> 
> Please help!! I really dunno how to solve it!

You should probably file a bug against gcc or binutils.


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer