This seems like a problem specific to the linker, but it's also so
specific to linux and MIPS that I decided to send it here first. If I was
wrong to do that let me know and I'll send it to bug-binutils@gnu.org
instead.
Anyway, I think I've found a problem in the ld scripts for MIPS.
Basically the built in script don't seem to fill in a .plt section. So if
I do this:
mips-linux-gcc prog.c
mips-linux-objdump -h a.out | grep plt
I get no output, but if I use my modified linker script I get this:
mips-linux-gcc -T tmp.ld prog.c
mips-linux-objdump -h a.out | grep plt
10 .plt 00000030 0040052c 0040052c 0000052c 2**2
which I believe is the correct output. The change that I made was to move
.stub sections into the .plt from the .text section. So this:
.plt : { *(.plt) }
.text :
{
_ftext = . ;
*(.text .stub .text.* .gnu.linkonce.t.*)
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
*(.mips16.fn.*) *(.mips16.call.*)
} =0
became this:
.plt : { *(.plt .stub) }
.text :
{
_ftext = . ;
*(.text .text.* .gnu.linkonce.t.*)
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
*(.mips16.fn.*) *(.mips16.call.*)
} =0
If anyone needs more information on this issue just let me know. It has
been in the MIPS tools for a while. I have been working from a recent
snapshot:
59) ./mips-linux-ld -v
GNU ld version 040121 20040121
but the same issue was around way back when (MontaVista preview kit 2.1):
61) /opt/hardhat/previewkit/mips/fp_be/bin/mips_fp_be-ld -v
GNU ld version 2.10.91 (with BFD 2.10.91.0.2)
Does anyone here have the knowledge to confirm that my changes are correct
and commit privileges to the binutils tree?
nathan
--
Nathan Field (ndf@ghs.com) All gone.
But the trouble with analogies is that analogies are like goldfish:
sometimes they have nothing to do with the topic at hand.
-- Crispin (from a posting to the Bugtraq mailing list)
