From: Brendan Simon <brendan@dgs.monash.edu.au>
To: binutils <binutils@sourceware.cygnus.com>,
Dan Malek <dmalek@jlc.net>,
Magnus Damm <eramdam@kieray1.p.y.ki.era.ericsson.se>,
gdb <gdb@sourceware.cygnus.com>
Subject: Using objdump to force a section to load with gdb.
Date: Thu, 01 Jul 1999 00:00:00 -0000 [thread overview]
Message-ID: <3766EA73.123505A6@dgs.monash.edu.au> (raw)
I have a linux kernel compiled for a mpc860 target and am trying to get
it to run by downloading it into memory using a background debugger
(BDM). The boot code gets to the point where it trys to uncompress the
kernel but fails because the image isn't loaded into memory (only .text,
.rodata and .data are loaded). I tried using objcopy to set the "image"
section to "load" but it does not seem to work. How can I get gdb to
load the image section (either using a gdb command or binutils) ?
Thanks,
Brendan Simon.
Here is a before/after trace using objcopy --set-section-flags. As you
can see, the load attribute is not set. I've tried all combinations of
attributes but I can't get it to work. Am I doing something wrong ?
powerpc-linux-objdump --section-headers myzimage
myzimage: file format elf32-powerpc
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00004324 00100000 00100000 00010000 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .rodata 00000460 00104330 00104330 00014330 2**4
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .data 000002f8 00105000 00105000 00015000 2**2
CONTENTS, ALLOC, LOAD, DATA
3 .bss 0000bbac 00106000 00106000 00016000 2**2
ALLOC
4 image 0006ccbf 00000000 00000000 00016000 2**0
CONTENTS, READONLY
powerpc-linux-objcopy --set-section-flags=image=load myzimage
powerpc-linux-objdump --section-headers myzimage
myzimage: file format elf32-powerpc
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00004324 00100000 00100000 00010000 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .rodata 00000460 00104330 00104330 00014330 2**4
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .data 000002f8 00105000 00105000 00015000 2**2
CONTENTS, ALLOC, LOAD, DATA
3 .bss 0000bbac 00106000 00106000 00016000 2**2
ALLOC
4 image 0006ccbf 00000000 00000000 00016000 2**0
CONTENTS
next reply other threads:[~1999-07-01 0:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-07-01 0:00 Brendan Simon [this message]
1999-07-01 0:00 ` Ian Lance Taylor
1999-07-01 0:00 ` Brendan Simon
1999-07-01 0:00 ` Ian Lance Taylor
1999-07-01 0:00 ` objdump or gdb to force a section to load ? Brendan Simon
1999-07-01 0:00 ` Jonathan Larmour
[not found] ` <376981EF.BE10D7C8@dgs.monash.edu.au>
[not found] ` <37699391.2CF83050@cygnus.co.uk>
1999-07-01 0:00 ` SOLVED: " Brendan Simon
1999-07-01 0:00 ` Ian Lance Taylor
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