[coldfire-gnu-discuss] Linux debug with P&E BDM - Toolchain Sourcery G++ Lite 4.2-125

Wed Oct 1 22:14:56 UTC 2008

We are doing the same thing with windows, eclipse and GDB.  We ran into the same issue and the set solib-absolute-prefix fixed us.  

Looking at your line you point to your libs source directory.  I believe the shared libraries use the root as a starting path in the debugger (I may be wrong).  We set "solib-absolute-prefix" to our root directory.  

These are indicating your path is wrong and I think its assuming root because of the '/lib':

&"Error while mapping shared library sections:\n"
&"/lib/libc.so.6: No such file or directory.\n"
Error while mapping shared library sections:
/lib/libc.so.6: No such file or directory.
Error while mapping shared library sections:
&"Error while mapping shared library sections:\n"
&"/lib/ld.so.1: No such file or directory.\n"
/lib/ld.so.1: No such file or directory.

Try changing the path followed by the gdb command "info shared" to see if it found the libraries. 

-----Original Message-----
From: raul.moreno at telvent.com [mailto:raul.moreno at telvent.com] 
Sent: Wednesday, October 01, 2008 8:30 AM
To: coldfire-gnu-discuss at codesourcery.com
Subject: [coldfire-gnu-discuss] Linux debug with P&E BDM - Toolchain Sourcery G++ Lite 4.2-125

Hi everybody!

Currently I have two different problem, but both related to the debugging.

I am using a M5484Lite EVB. I downloaded the Sourcery G++ Lite 4.2-125
toolchain and I want to use Linux as the operating system, so I use the
m68k-linux-gnu- commands.

I know it sounds weird, but the team works in Windows. We installed the
Eclipse on Windows, in spite of developing to a Linux target. We followed
as a guide a pair of example I found in internet about how to add a CDT
plug to Eclipse (document "Open source Coldfire IDE" and "ARM cross
development with GNU Toolchain and Eclipse").

Here the problem goes:

1. Applications debug. First of all I have to say I have been able to debug
a simple application! But I still have a doubt about the libraries.
I use the gdbserver in the target and m68k-linux-gnu-gdb in the host.
Next I show what appears in the console:

189-gdb-set confirm off

189^done

(gdb)

190-gdb-set width 0

190^done

(gdb)

191-gdb-set height 0

191^done

192-interpreter-exec console echo

(gdb)

192^done

(gdb)

193-gdb-show prompt

193^done,value="(gdb) "

(gdb)

194 set solib-absolute-prefix
C:\\Toolchain_CodeSourcery\\m68k-linux-gnu\\libc\\usr\\lib

&"set solib-absolute-prefix
C:\\\\Toolchain_CodeSourcery\\\\m68k-linux-gnu\\\\libc\\\\usr\\\\lib \n"

set solib-absolute-prefix
C:\Toolchain_CodeSourcery\m68k-linux-gnu\libc\usr\lib

194^done

195 set remote exec-file Hello.elf

(gdb)

&"set remote exec-file Hello.elf \n"

195^done

set remote exec-file Hello.elf

196 target remote 172.19.134.100:2345

(gdb)

&"target remote 172.19.134.100:2345\n"

target remote 172.19.134.100:2345

~"[New Thread 206]\n"

[New Thread 206]

warning: Unable to find dynamic linker breakpoint function.

GDB will be unable to debug shared library initializers

and track explicitly loaded dynamic code.

&"warning: Unable to find dynamic linker breakpoint function.\nGDB will be
unable to debug shared library initializers\nand track explicitly loaded
dynamic code."

&"\n"

~"0x80005cdc in ?? ()\n"

0x80005cdc in ?? ()

196^done

197-stack-list-frames

(gdb)

197^done,stack=[frame={level="0",addr="0x80005cdc",func="??"},frame={level="1",addr="0x00000001",func="??"},frame={level="2",addr="0xbfe9df6d",func="??"},frame={level="3",addr="0x00000000",func="??"}]

...

217 c

&"c\n"

c

&"Error while mapping shared library sections:\n"

&"/lib/libc.so.6: No such file or directory.\n"

Error while mapping shared library sections:

/lib/libc.so.6: No such file or directory.

Error while mapping shared library sections:

&"Error while mapping shared library sections:\n"

&"/lib/ld.so.1: No such file or directory.\n"

/lib/ld.so.1: No such file or directory.

~"\nBreakpoint "

Breakpoint ~"1, main (arg=1, argv=0xbfe9dec4) at main.c:15\n"

1, main (arg=1, argv=0xbfe9dec4) at main.c:15

~"15\t\tint a = 2;\n"

15          int a = 2;

217^done

...

Red lines show the probems I've got. I thought I would solve the first red
errors using "set solib-absolute-prefix" or "set sysroot", but it didn't. I
am not sure if it just says I can't debug the shared libraries.
The second one I don't know what it means (error mapping libraries???).
However, I can debug right.

2. Linux kernel debug. First I try to to debug the Linux kernel from the
command-line and after that I'll try to do it with Eclipse. I continue
working on Windows, although if it was completely necessary, I would do on
Linux, only for the kernel.
I have a P&E Parallel Port Cable BDM and a USBMultilink and it seems, both
work:

C:\Toolchain_CodeSourcery\bin>m68k-linux-gnu-sprite.exe -i

CodeSourcery ColdFire Debug Sprite (Sourcery G++ Lite 4.2-125)

pe: [speed=<n:0-31>&memory-timeout=<n:0-99>] P&E Adaptor

  pe://USBMultilink/PE6015776 - USB1 : USB-ML-CF Rev C (PE6015776)

  pe://CycloneProMaxSerial:1 - COM1 : Serial Port 1

  pe://ParallelPortCable:1 - LPT1 : Parallel Port 1 (Address $0378)

ccs: [timeout=<n>&speed=<n>] CCS Adaptor

  ccs://$Host:$Port/$Chain_position - CCS address

tblcf: TBLCF Interface

I am trying with the parallel one. I create the xml for my board
m5484Liteevb.xml:

<?xml version="1.0"?>

<!DOCTYPE board SYSTEM "board.dtd">

<!-- Description for m54854Lite Evaluation Board

     Version:Sourcery G++ Lite 4.2-125

     BugURL:https://support.codesourcery.com/GNUToolchain/

     Copyright 2007, 2008 CodeSourcery.

     The authors hereby grant permission to use, copy, modify, distribute,

     and license this software and its documentation for any purpose,
provided

     that existing copyright notices are retained in all copies and that
this

     notice is included verbatim in any distributions. No written
agreement,

     license, or royalty fee is required for any of the authorized uses.

     Modifications to this software may be copyrighted by their authors

     and need not follow the licensing terms described here, provided that

     the new terms are clearly indicated on the first page of each file
where

     they apply. -->

<board>

  <properties>

    <property name="cache"/>

  </properties>

  <initialize>

    <!-- If MBAR changes all following writes must change

         and if a memory configuration file is used,

         the reserved areas in the register block must

         change also. -->

    <!-- Turn on MBAR at 0x1000_0000 -->

    <write-register address="0xc0f" value="0x10000000"/>

    <!-- Turn on RAMBAR0 at address 2000_0000 -->

    <write-register address="0xc04" value="0x20000021"/>

    <!-- Turn on RAMBAR1 at address 2000_1000  -->

    <write-register address="0xc05" value="0x20001021"/>

    <!-- Init CS0 (BootFLASH @ FE00_0000 - FE1F_FFFF 2Mbytes) -->

    <write-memory address="0x10000500" value="0xfe000000"/>

    <write-memory address="0x10000508" value="0x1980"/>

    <write-memory address="0x10000504" value="0x1f0001"/>

    <!-- SDRAM Initialization @ 0000_0000 - 03FF_FFFF 64Mbytes -->

    <write-memory address="0x10000004" value="0x2aa"/>

    <write-memory address="0x10000020" value="0x19"/>

    <write-memory address="0x10000024" value="0x0"/>

    <write-memory address="0x10000108" value="0x53722930"/>

    <write-memory address="0x1000010c" value="0x24330000"/>

    <write-memory address="0x10000104" value="0xe10f0002"/>

    <write-memory address="0x10000100" value="0x40010000"/>

    <write-memory address="0x10000100" value="0x5890000"/>

    <write-memory address="0x10000104" value="0xe10f0002"/>

    <write-memory address="0x10000104" value="0xe10f0004"/>

    <write-memory address="0x10000104" value="0xe10f0004"/>

    <write-memory address="0x10000100" value="0x1890000"/>

    <write-memory address="0x10000104" value="0x710f0f00"/>

    <delay time="100ms"/>

  </initialize>

  <memory-map>

    <memory-device address="0x00000000" size="64MB" type="ram">

      <description>64MBytes DDR SDRAM</description>

    </memory-device>

    <memory-device address="0x20000000" size="4KB" type="ram">

      <description>4KBytes Internal SRAM</description>

    </memory-device>

    <memory-device address="0x20001000" size="4KB" type="ram">

      <description>4KBytes Internal SRAM</description>

    </memory-device>

    <memory-device address="0xfe000000" size="4MB" type="flash"
device="cfi">

      <description>4MBytes External BootFlash, 16bit wide</description>

    </memory-device>

  </memory-map>

</board>

Next

C:\Toolchain_CodeSourcery\bin>m68k-linux-gnu-gdb.exe
C:\\Proyectos\\workspace_Ec

lipseCF\\Linux_kernel\\vmlinux

GNU gdb (Sourcery G++ Lite 4.2-125) 6.7.50.20080107-cvs

License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law.  Type "show copying"

and "show warranty" for details.

This GDB was configured as "--host=i686-mingw32 --target=m68k-linux-gnu".

For bug reporting instructions, please see:

<https://support.codesourcery.com/GNUToolchain/>.

..

<-linux-gnu-sprite.exe pe://ParallelPortCable m5484Liteevb

Remote debugging using | m68k-linux-gnu-sprite.exe pe://ParallelPortCable
m5484L

iteevb

m68k-linux-gnu-sprite: Opening P&E ParallelPortCable port 1 (LPT1 :
Parallel Por

t 1 (Address $0378))

m68k-linux-gnu-sprite: Target reset

0x00000000 in ?? ()

(gdb) load

Loading section .text.head, size 0x102a lma 0x20000

Loading section .text, size 0x1a1512 lma 0x2102c

Loading section .cpuinit.text, size 0xa26 lma 0x1c2540

Loading section .meminit.text, size 0x1aa lma 0x1c2f66

Loading section __ex_table, size 0x26d0 lma 0x1c3110

Loading section .rodata, size 0x4a943 lma 0x1c6000

Loading section .pci_fixup, size 0x580 lma 0x210944

Loading section __ksymtab, size 0x3ee8 lma 0x210ec4

Loading section __ksymtab_gpl, size 0x14f0 lma 0x214dac

Loading section __ksymtab_strings, size 0xb172 lma 0x21629c

Loading section __param, size 0xbf0 lma 0x221410

Loading section .data, size 0x10b40 lma 0x222000

Loading section .cpuinit.data, size 0x32 lma 0x232b40

Loading section .meminit.data, size 0xc lma 0x232b72

Loading section .data.cacheline_aligned, size 0xb0 lma 0x232b80

Loading section .notes, size 0x24 lma 0x232c30

Loading section .init.text, size 0x1223e lma 0x234000

Loading section .init.data, size 0x168c lma 0x24623e

Loading section .init.setup, size 0x264 lma 0x2478d0

Loading section .initcall.init, size 0x1f4 lma 0x247b34

Loading section .con_initcall.init, size 0x8 lma 0x247d28

Loading section .init.ramfs, size 0x86 lma 0x248000

Loading section .data.init_task, size 0x2000 lma 0x24a000

Start address 0x20000, load size 2261467

Transfer rate: 6 KB/sec, 7463 bytes/write.

(gdb) break start_kernel

Breakpoint 1 at 0x2347f8: file init/main.c, line 512.

(gdb) l

1       init/main.c: No such file or directory.

        in init/main.c

(gdb) c

Continuing.

Breakpoint 1, start_kernel () at init/main.c:512

512     in init/main.c

(gdb) c

Continuing.

m68k-linux-gnu-sprite: error: Hardware device not ready

Error from remote target: Hardware device not ready

(gdb)

You  can see at the beginning it seems  that all is OK, but after loading
the image in RAM, I try to debug but the main.c is not found.
I also tried to debug with Eclipse, but an error occurs.

Could you help with these problems?

Thanks in advance and sorry for the long message.

Raúl Moreno

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