Is there anyway to get more information out of objcopy? When I run it,
I get the warnings I mentioned before, but no errors, however the target
file is empty. Here is an abridged copy of what I get:
[jvhorne@guava-lx linux]$ make orionboot
make -C arch/mips/orion orionboot
make: Entering directory `/dvlp/jvhorne/jvh_21_lx_mips_cross_test_sv/vobs/gpl/linux/arch/mips/orion'
mips-linux-objcopy -Obinary --verbose ../../../vmlinux orion.nosym
copy from ../../../vmlinux(elf32-bigmips) to orion.nosym(binary)
BFD: Warning: Writing section `.app_header' to huge (ie negative) file offset 0x800fec30.
BFD: Warning: Writing section `.text' to huge (ie negative) file offset 0x80100c30.
BFD: Warning: Writing section `.fixup' to huge (ie negative) file offset 0x80236930.
BFD: Warning: Writing section `.text.exit' to huge (ie negative) file offset 0x80237830.
mips-linux-objcopy: orion.nosym: File truncated
Do you think that the reason objcopy fails is because it isn't treating
the addresses as 32 bit addresses, or could it be something else?
From: Maciej W. Rozycki [mailto:firstname.lastname@example.org]
Sent: Thursday, January 04, 2001 8:23 AM
To: Ralf Baechle
Cc: John Van Horne; 'email@example.com'; 'firstname.lastname@example.org'
Subject: Re: your mail
On Thu, 4 Jan 2001, Ralf Baechle wrote:
> > I see that our start address of 0x80102584 has been turned into
> > 0xffffffff80102584. I'm thinking that
> > I need to tell ld something to stop it from doing this. Any ideas?
> That's be ok. 32-bit MIPS addresses are sign-extended into 64-bit addresses.
> Older binutils used to zero-extend addresses which was broken. So what
> you observe is actually the sympthom of a bug that got fixed.
I'm not sure that's the best solution, I'm afraid. For elf32-mips
addresses should be 32-bit and not 64-bit. It would be consistent with
other 32-bit platforms, it would make interoperability easier (ksymoops
cannot make use of System.map to grok kernel oopses which provide 32-bit
addresses) and it would make objdump outputs more readable.
Fixing this problem with BFD is on my to do list (but has a low priority
+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+ e-mail: email@example.com, PGP key available +