[U-Boot] Instructions in TEXT section can not load data from other section

[U-Boot] Instructions in TEXT section can not load data from other section

[jrjr]

Hi, everyone. 

 I have got a problem when I porting U-BOOT to my board

with MPC8247. My configuration file is based on the MPC8260ADS_config.

The problem is : The instruction in TEXT section can not load data in

other (DATA) sections. It seems there is a relocation to the data section .  

For example:   If I use

    for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
        if ((*init_fnc_ptr) () != 0) {
            hang ();
        }
    }  

I can't jump to functions in  init_sequence[]  ;

If I called functions such as    get_clocks()  in board_init_f  , it works fine.

So the code in board_init_f can not load address in init_sequence[] , because

init_sequence[]  is out of TEXT section.   

The same thing happens with iop_conf_tab[][], and strings used by "puts".  

Anyone there has the same problem? Or know the point? Pls help!  

Great Great Thanks !  
-----------------------------------------------------------
-JRJR

 		 	   		  
_________________________________________________________________
SkyDrive????????????????????????!
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[U-Boot] Instructions in TEXT section can not load data from other section

[Joakim Tjernlund]

>
> Hi, everyone.
>
>  I have got a problem when I porting U-BOOT to my board
>
> with MPC8247. My configuration file is based on the MPC8260ADS_config.
>
> The problem is : The instruction in TEXT section can not load data in
>
> other (DATA) sections. It seems there is a relocation to the data section .
>
> For example:   If I use
>
>     for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
>         if ((*init_fnc_ptr) () != 0) {
>             hang ();
>         }
>     }
>
> I can't jump to functions in  init_sequence[]  ;
>
> If I called functions such as    get_clocks()  in board_init_f  , it works fine.
>
> So the code in board_init_f can not load address in init_sequence[] , because
>
> init_sequence[]  is out of TEXT section.
>
> The same thing happens with iop_conf_tab[][], and strings used by "puts".
>
> Anyone there has the same problem? Or know the point? Pls help!

Yes, that is a relocation problem. Do you compile with -mrelocatable?
If so, you might have a broken toolchain that don't produce .fixups

    jocke

[U-Boot] Instructions in TEXT section can not load data from other section

[jrjr]

Thanks for your advise, I compile with -mrelocatable. If I remove this flag, Error is shown:

ERROR: Your compiler doesn't generate .fixup sections!

My host gcc is  gcc 4.1.2 20080704 (Red Hat 4.1.2-44),
I try different toolchain:
powerpc-unknown-linux-gnu-gcc  gcc version 4.4.3 (crosstool-NG-1.6.0)
ppc_82xx-gcc gcc version 4.2.2   from ELDK
powerpc-603-linux-gnu-gcc gcc version 4.1.0 from crosstool 0.43

The problem is still there    : (       
----------------------------------------------------
--JRJR


> Subject: Re: [U-Boot] Instructions in TEXT section can not load data from other	section
> To: jason622 at hotmail.com
> CC: u-boot at lists.denx.de
> From: joakim.tjernlund at transmode.se
> Date: Tue, 16 Mar 2010 09:50:42 +0100
> 
> >
> > Hi, everyone.
> >
> >  I have got a problem when I porting U-BOOT to my board
> >
> > with MPC8247. My configuration file is based on the MPC8260ADS_config.
> >
> > The problem is : The instruction in TEXT section can not load data in
> >
> > other (DATA) sections. It seems there is a relocation to the data section .
> >
> > For example:   If I use
> >
> >     for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
> >         if ((*init_fnc_ptr) () != 0) {
> >             hang ();
> >         }
> >     }
> >
> > I can't jump to functions in  init_sequence[]  ;
> >
> > If I called functions such as    get_clocks()  in board_init_f  , it works fine.
> >
> > So the code in board_init_f can not load address in init_sequence[] , because
> >
> > init_sequence[]  is out of TEXT section.
> >
> > The same thing happens with iop_conf_tab[][], and strings used by "puts".
> >
> > Anyone there has the same problem? Or know the point? Pls help!
> 
> Yes, that is a relocation problem. Do you compile with -mrelocatable?
> If so, you might have a broken toolchain that don't produce .fixups
> 
>     jocke
> 
 		 	   		  
_________________________________________________________________
SkyDrive????????????????????????!
http://www.windowslive.cn/campaigns/e-magazine/ngmchina/?a=c

[U-Boot] Instructions in TEXT section can not load data from other section

[jrjr]

jocke,

Thanks for your advise,  my lds file is from cpu/mpc8260/u-boot.lds ; I don't change it.
Here is the fixup part:

------------------------------
  .reloc   :
  {
    *(.got)
    _GOT2_TABLE_ = .;
    *(.got2)
    _FIXUP_TABLE_ = .;
    *(.fixup)
  }
  __got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >> 2;
  __fixup_entries = (. - _FIXUP_TABLE_) >> 2;
--------------------------------------------

And my TEXT_BASE is 0xFFF80000 , because my boot flash is 0.5MB .
I can execute instructions in text section after power on reset.
Is there anything wrong with this configure?
Thanks for your help.

--JRJR


> Subject: RE: [U-Boot] Instructions in TEXT section can not load data from other	section
> To: jason622 at hotmail.com
> CC: u-boot at lists.denx.de
> From: joakim.tjernlund at transmode.se
> Date: Wed, 17 Mar 2010 08:05:23 +0100
> 
> jrjr <jason622@hotmail.com> wrote on 2010/03/17 07:28:04:
> >
> > Thanks for your advise, I compile with -mrelocatable. If I remove this flag,
> > Error is shown:
> >
> > ERROR: Your compiler doesn't generate .fixup sections!
> >
> > My host gcc is  gcc 4.1.2 20080704 (Red Hat 4.1.2-44),
> > I try different toolchain:
> > powerpc-unknown-linux-gnu-gcc  gcc version 4.4.3 (crosstool-NG-1.6.0)
> > ppc_82xx-gcc gcc version 4.2.2   from ELDK
> > powerpc-603-linux-gnu-gcc gcc version 4.1.0 from crosstool 0.43
> >
> > The problem is still there    : (
> > ----------------------------------------------------
> > --JRJR
> 
> Check your linker script(*.lds) for .fixup sections and compare
> that to a working working board.
> OR
> Your TEXT_BASE is wrong
> 
> >
> >
> > > Subject: Re: [U-Boot] Instructions in TEXT section can not load data from
> > other section
> > > To: jason622 at hotmail.com
> > > CC: u-boot at lists.denx.de
> > > From: joakim.tjernlund at transmode.se
> > > Date: Tue, 16 Mar 2010 09:50:42 +0100
> > >
> > > >
> > > > Hi, everyone.
> > > >
> > > > I have got a problem when I porting U-BOOT to my board
> > > >
> > > > with MPC8247. My configuration file is based on the MPC8260ADS_config.
> > > >
> > > > The problem is : The instruction in TEXT section can not load data in
> > > >
> > > > other (DATA) sections. It seems there is a relocation to the data section .
> > > >
> > > > For example: If I use
> > > >
> > > > for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
> > > > if ((*init_fnc_ptr) () != 0) {
> > > > hang ();
> > > > }
> > > > }
> > > >
> > > > I can't jump to functions in init_sequence[] ;
> > > >
> > > > If I called functions such as get_clocks() in board_init_f , it works fine.
> > > >
> > > > So the code in board_init_f can not load address in init_sequence[] , because
> > > >
> > > > init_sequence[] is out of TEXT section.
> > > >
> > > > The same thing happens wit h iop_conf_tab[][], and strings used by "puts".
> > > >
> > > > Anyone there has the same problem? Or know the point? Pls help!
> > >
> > > Yes, that is a relocation problem. Do you compile with -mrelocatable?
> > > If so, you might have a broken toolchain that don't produce .fixups
> > >
> > > jocke
> > >
> >
> > ??+??+?? ??????,??MSN????! ?????
 		 	   		  
_________________________________________________________________
?????????????????msn?????
http://ditu.live.com/?form=TL&swm=1

[U-Boot] Instructions in TEXT section can not load data from other section

[jrjr]

And I have made some change in cpu/mpc8260/start.S, I removed following lines:

#ifndef CONFIG_SYS_RAMBOOT
    /* When booting from ROM (Flash or EPROM), clear the        */
    /* Address Mask in OR0 so ROM appears everywhere        */
    /*--------------------------------------------------------------*/

    lis    r3, (CONFIG_SYS_IMMR+IM_REGBASE)@h
    lwz    r4, IM_OR0 at l(r3)
    li    r5, 0x7fff
    and    r4, r4, r5
    stw    r4, IM_OR0 at l(r3)

    /* Calculate absolute address in FLASH and jump there        */
    /*--------------------------------------------------------------*/

    lis    r3, CONFIG_SYS_MONITOR_BASE at h
    ori    r3, r3, CONFIG_SYS_MONITOR_BASE at l
    addi    r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
    mtlr    r3
    blr

in_flash:
#endif    /* CONFIG_SYS_RAMBOOT */

Becasue I don't think I need to clear the Address Mask in OR0, Is there anything wrong?

--JRJR

> Subject: RE: [U-Boot] Instructions in TEXT section can not load data from other	section
> To: jason622 at hotmail.com
> CC: u-boot at lists.denx.de
> From: joakim.tjernlund at transmode.se
> Date: Wed, 17 Mar 2010 08:05:23 +0100
> 
> jrjr <jason622@hotmail.com> wrote on 2010/03/17 07:28:04:
> >
> > Thanks for your advise, I compile with -mrelocatable. If I remove this flag,
> > Error is shown:
> >
> > ERROR: Your compiler doesn't generate .fixup sections!
> >
> > My host gcc is  gcc 4.1.2 20080704 (Red Hat 4.1.2-44),
> > I try different toolchain:
> > powerpc-unknown-linux-gnu-gcc  gcc version 4.4.3 (crosstool-NG-1.6.0)
> > ppc_82xx-gcc gcc version 4.2.2   from ELDK
> > powerpc-603-linux-gnu-gcc gcc version 4.1.0 from crosstool 0.43
> >
> > The problem is still there    : (
> > ----------------------------------------------------
> > --JRJR
> 
> Check your linker script(*.lds) for .fixup sections and compare
> that to a working working board.
> OR
> Your TEXT_BASE is wrong
> 
> >
> >
> > > Subject: Re: [U-Boot] Instructions in TEXT section can not load data from
> > other section
> > > To: jason622 at hotmail.com
> > > CC: u-boot at lists.denx.de
> > > From: joakim.tjernlund at transmode.se
> > > Date: Tue, 16 Mar 2010 09:50:42 +0100
> > >
> > > >
> > > > Hi, everyone.
> > > >
> > > > I have got a problem when I porting U-BOOT to my board
> > > >
> > > > with MPC8247. My configuration file is based on the MPC8260ADS_config.
> > > >
> > > > The problem is : The instruction in TEXT section can not load data in
> > > >
> > > > other (DATA) sections. It seems there is a relocation to the data section .
> > > >
> > > > For example: If I use
> > > >
> > > > for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
> > > > if ((*init_fnc_ptr) () != 0) {
> > > > hang ();
> > > > }
> > > > }
> > > >
> > > > I can't jump to functions in init_sequence[] ;
> > > >
> > > > If I called functions such as get_clocks() in board_init_f , it works fine.
> > > >
> > > > So the code in board_init_f can not load address in init_sequence[] , because
> > > >
> > > > init_sequence[] is out of TEXT section.
> > > >
> > > > The same thing happens wit h iop_conf_tab[][], and strings used by "puts".
> > > >
> > > > Anyone there has the same problem? Or know the point? Pls help!
> > >
> > > Yes, that is a relocation problem. Do you compile with -mrelocatable?
> > > If so, you might have a broken toolchain that don't produce .fixups
> > >
> > > jocke
> > >
> >
> > ??+??+?? ??????,??MSN????! ?????
 		 	   		  
_________________________________________________________________
SkyDrive????????????????????????!
http://www.windowslive.cn/campaigns/e-magazine/ngmchina/?a=c

[U-Boot] Instructions in TEXT section can not load data from other section

[Joakim Tjernlund]

jrjr <jason622@hotmail.com> wrote on 2010/03/17 09:45:08:
>
> And I have made some change in cpu/mpc8260/start.S, I removed following lines:
>
> #ifndef CONFIG_SYS_RAMBOOT
>     /* When booting from ROM (Flash or EPROM), clear the        */
>     /* Address Mask in OR0 so ROM appears everywhere        */
>     /*--------------------------------------------------------------*/
>
>     lis    r3, (CONFIG_SYS_IMMR+IM_REGBASE)@h
>     lwz    r4, IM_OR0 at l(r3)
>     li    r5, 0x7fff
>     and    r4, r4, r5
>     stw    r4, IM_OR0 at l(r3)
>
>     /* Calculate absolute address in FLASH and jump there        */
>     /*--------------------------------------------------------------*/
>
>     lis &nbs p;  r3, CONFIG_SYS_MONITOR_BASE at h
>     ori    r3, r3, CONFIG_SYS_MONITOR_BASE at l
>     addi    r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
>     mtlr    r3
>     blr
>
> in_flash:
> #endif    /* CONFIG_SYS_RAMBOOT */
>
> Becasue I don't think I need to clear the Address Mask in OR0, Is there anything wrong?

uhh, Why did you remove that? It is vital code, especially the
/* Calculate absolute address in FLASH and jump there  */ part.

[U-Boot] Instructions in TEXT section can not load data from other section

[jrjr]

Because I want to use LED controlled by OR3 to debug the code,so I don't want to clear OR0.

You remind me, so I enable the "Calculate absolute address in FLASH and jump there  " part,

It seems that I get close to the point:  jump to "in_flash:" failed.

Here is the start.S part:

    /* Calculate absolute address in FLASH and jump there        */
    /*--------------------------------------------------------------*/

    lis    r3, CONFIG_SYS_MONITOR_BASE at h
    ori    r3, r3, CONFIG_SYS_MONITOR_BASE at l
    addi    r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
    mtlr    r3
    blr

in_flash:
    ...
    ...

The disassemble part :

fff80158:    3c 60 ff f8     lis     r3,-8
fff8015c:    60 63 00 00     ori     r3,r3,0       /*r3 is 0xfff80000 */
fff80160:    38 63 01 6c     addi    r3,r3,364 /*   0xfff8016c    */
fff80164:    7c 68 03 a6     mtlr    r3
fff80168:    4e 80 00 20     blr

fff8016c <in_flash>:

And my text_base is 0xfff80000.  
Something is wrong with the "absolute address" and "relative address",   I am not sure about
that. Expect for your advise. 

--JRJR

> Subject: RE: [U-Boot] Instructions in TEXT section can not load data from other	section
> To: jason622 at hotmail.com
> CC: u-boot at lists.denx.de
> From: joakim.tjernlund at transmode.se
> Date: Wed, 17 Mar 2010 09:48:42 +0100
> 
> jrjr <jason622@hotmail.com> wrote on 2010/03/17 09:45:08:
> >
> > And I have made some change in cpu/mpc8260/start.S, I removed following lines:
> >
> > #ifndef CONFIG_SYS_RAMBOOT
> >     /* When booting from ROM (Flash or EPROM), clear the        */
> >     /* Address Mask in OR0 so ROM appears everywhere        */
> >     /*--------------------------------------------------------------*/
> >
> >     lis    r3, (CONFIG_SYS_IMMR+IM_REGBASE)@h
> >     lwz    r4, IM_OR0 at l(r3)
> >     li    r5, 0x7fff
> >     and    r4, r4, r5
> >     stw    r4, IM_OR0 at l(r3)
> >
> >     /* Calculate absolute address in FLASH and jump there        */
> >     /*--------------------------------------------------------------*/
> >
> >     lis &nbs p;  r3, CONFIG_SYS_MONITOR_BASE at h
> >     ori    r3, r3, CONFIG_SYS_MONITOR_BASE at l
> >     addi    r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
> >     mtlr    r3
> >     blr
> >
> > in_flash:
> > #endif    /* CONFIG_SYS_RAMBOOT */
> >
> > Becasue I don't think I need to clear the Address Mask in OR0, Is there anything wrong?
> 
> uhh, Why did you remove that? It is vital code, especially the
> /* Calculate absolute address in FLASH and jump there  */ part.
> 
 		 	   		  
_________________________________________________________________
MSN????????????????25???????????2010?????????
http://kaba.msn.com.cn/?k=1

[U-Boot] Instructions in TEXT section can not load data from other section

[Joakim Tjernlund]

jrjr <jason622@hotmail.com> wrote on 2010/03/17 10:49:15:
>
> Because I want to use LED controlled by OR3 to debug the code,so I don't want
> to clear OR0.
>
> You remind me, so I enable the "Calculate absolute address in FLASH and jump
> there " part,
>
> It seems that I get close to the point:  jump to "in_flash:" failed.

Did you read the comment?
   /* When booting from ROM (Flash or EPROM), clear the        */
    /* Address Mask in OR0 so ROM appears everywhere        */

Try with pristine source first.

[U-Boot] Instructions in TEXT section can not load data from other section

[Scott Wood]

On Wed, Mar 17, 2010 at 09:49:15AM +0000, jrjr wrote:
> 
> Because I want to use LED controlled by OR3 to debug the code,so I don't want to clear OR0.

It's temporary; you can use bank 3 after BRn/ORn are set to their final
values (confusingly named PRELIM) in cpu_init_f().

-Scott