Re: [Qemu-devel] Re: [OpenBIOS] building openbios-qemu.elf?

[Hollis Blanchard <hollisb@us.ibm.com>]

On Tue, 2009-02-24 at 00:07 +0100, Laurent Vivier wrote:
> Hi,
> 
> Do you use source from SVN head ?

Yes.

> Do you have any information in obj-ppc/build.log ?

This is somewhat interesting:

powerpc-440-linux-gnu-strip openbios-qemu.elf
BFD: st4PszLi: warning: allocated section `.bss' not in segment
BFD: st4PszLi: warning: allocated section `.sbss' not in segment

The "nostrip" version of openbios-qemu.elf looks much better:

Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  LOAD           0x000094 0xfff00000 0xfff00000 0x42044 0x4bcb4 RWE 0x4
  LOAD           0x0420d8 0xfffffffc 0xfffffffc 0x00004 0x00004 R E 0x1
  GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4

 Section to Segment mapping:
  Segment Sections...
   00     .text.vectors .text .rodata .data .sdata 
   01     .romentry 
   02     

So something goes wrong in the strip process.

-- 
Hollis Blanchard
IBM Linux Technology Center

> I use gcc-4.3.2 on my powerPC G4, powerpc-linux-gnu-gcc-4.2.4 on intel  
> T5500 and size is fine.
> 
> Regards,
> Laurent
> 
> Le 23 févr. 09 à 20:52, Hollis Blanchard a écrit :
> 
> > Hi, I just tried to build openbios-qemu.elf, but it is a little too  
> > big
> > (1MB + 4 bytes):
> >
> > Elf file type is EXEC (Executable file)
> > Entry point 0xfff08000
> > There are 3 program headers, starting at offset 52
> >
> > Program Headers:
> >  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg  
> > Align
> >  LOAD           0x000094 0xfff00000 0xfff00000 0x100000 0x100000 RWE  
> > 0x4
> >  LOAD           0x100094 0xfffffffc 0xfffffffc 0x00004 0x00004 R E 0x1
> >  GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4
> >
> > Section to Segment mapping:
> >  Segment Sections...
> >   00     .text.vectors .text .rodata .data .sdata .bss .sbss
> >   01     .romentry
> >   02
> >
> > In contrast, the openbios-ppc binary in qemu looks like this:
> >
> > Elf file type is EXEC (Executable file)
> > Entry point 0xfff08000
> > There are 2 program headers, starting at offset 52
> >
> > Program Headers:
> >  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg  
> > Align
> >  LOAD           0x000074 0xfff00000 0xfff00000 0x41044 0x4bc44 RWE 0x4
> >  LOAD           0x0410b8 0xfffffffc 0xfffffffc 0x00004 0x00004 R E 0x1
> >
> > Section to Segment mapping:
> >  Segment Sections...
> >   00     .text.vectors .text .rodata .data .sdata .bss .sbss.1 .sbss. 
> > 2 .sbss.3 .sbss.4 .sbss.5 .sbss.6 .sbss.7 .sbss.8
> >   01     .romentry
> >
> > I'm building with gcc 4.2.3. Any ideas?
> >
> > -- 
> > Hollis Blanchard
> > IBM Linux Technology Center
> >
> >
> > --
> > OpenBIOS                 http://openbios.org/
> > Mailinglist:  http://lists.openbios.org/mailman/listinfo
> > Free your System - May the Forth be with you
> 
>