Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-12 Thread Florian Klämpfl via fpc-devel 

Am 11.02.21 um 09:34 schrieb Dimitrios Chr. Ioannidis via fpc-devel:
You are probably right, I never checked if the pointer change of 
#33914 also fixed the original issue in the mailing list so the 
default dwarf version for AVR could be changed back to 2.  But then 
Florian does have a point, why not make the default for all targets 
dwarf 3?


I really don't know enough to have an opinion on this. As Florian wrote, 
Martin can answer this.


But if dwarf 3 is the default for avr, then IMHO, in avr link script 
generation are missing the following  :




Indeed, thanks, I added it.

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Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-11 Thread Dimitrios Chr. Ioannidis via fpc-devel 

Hi,

Στις 10/2/2021 11:12 μ.μ., ο/η Christo Crause έγραψε:
On Wed, Feb 10, 2021 at 3:16 PM Dimitrios Chr. Ioannidis via fpc-devel 
> wrote:


Hi,

Στις 10/2/2021 2:25 μ.μ., ο/η Christo Crause έγραψε:

On Wed, Feb 10, 2021 at 12:47 PM Dimitrios Chr. Ioannidis via
fpc-devel mailto:fpc-devel@lists.freepascal.org>> wrote:

Hi,

   I read at compiler/systems/i_embed.pas the AVR systeminfo,
is the
only one that, has as default "dbg : dbg_dwarf3". The other
embed
systems that uses dwarf ( ARM, MIPSEL, i8086, m68k,
RISCV32/64, XTENSA,
Z80 ), all have as default "dbg : dbg_dwarf2".

   The AVR has problems with dbg_dwarf2 ? If not, could you
please
change the AVR systeminfo to dwarf2 also for consistency ?


That was a fix for compiling controller units with lots of
symbols, refer to this discussion thread:
https://www.mail-archive.com/fpc-devel@lists.freepascal.org/msg35416.html

Dwarf2 is fine in general, unless the address (I think address in
dwarf debug section, the details are a bit hazy in my memory) of
symbols exceed 65535. Dwarf3 offers a larger data type for this
scenario.


 I'm using ppcrossavr with systeminfo default "dbg : dbg_dwarf2"
with no problems. If I remember correctly, IMHO, fixing the issue
33914 ( https://bugs.freepascal.org/view.php?id=33914
 ) had the
collateral effect to fixing also the above.

 For test, I just debugged a physical atmega32u2 mcu with Lazarus
with no problems at all. Also for test, I builded an avr35 subarch
ppcrossavr and also debugged a physical atmega32u2 mcu with no
problems.


You are probably right, I never checked if the pointer change of 
#33914 also fixed the original issue in the mailing list so the 
default dwarf version for AVR could be changed back to 2.  But then 
Florian does have a point, why not make the default for all targets 
dwarf 3?


I really don't know enough to have an opinion on this. As Florian wrote, 
Martin can answer this.


But if dwarf 3 is the default for avr, then IMHO, in avr link script 
generation are missing the following  :


===
--- t_embed.pas    (revision 48516)
+++ t_embed.pas    (working copy)
@@ -1074,6 +1074,11 @@
   Add('  .debug_str  0 : { *(.debug_str) }');
   Add('  .debug_loc  0 : { *(.debug_loc) }');
   Add('  .debug_macinfo  0 : { *(.debug_macinfo) }');
+  Add('  /* DWARF 3 */');
+  Add('  .debug_pubtypes 0 : { *(.debug_pubtypes) }');
+  Add('  .debug_ranges   0 : { *(.debug_ranges) }');
+  Add('  /* DWARF Extension.  */');
+  Add('  .debug_macro    0 : { *(.debug_macro) }');
   Add('}');
 end;
 {$endif AVR}

regards,

--

Dimitrios Chr. Ioannidis

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Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-10 Thread Christo Crause via fpc-devel 
On Wed, Feb 10, 2021 at 3:16 PM Dimitrios Chr. Ioannidis via fpc-devel <
fpc-devel@lists.freepascal.org> wrote:

> Hi,
> Στις 10/2/2021 2:25 μ.μ., ο/η Christo Crause έγραψε:
>
> On Wed, Feb 10, 2021 at 12:47 PM Dimitrios Chr. Ioannidis via fpc-devel <
> fpc-devel@lists.freepascal.org> wrote:
>
>> Hi,
>>
>>I read at compiler/systems/i_embed.pas the AVR systeminfo, is the
>> only one that, has as default "dbg : dbg_dwarf3". The other embed
>> systems that uses dwarf ( ARM, MIPSEL, i8086, m68k, RISCV32/64, XTENSA,
>> Z80 ), all have as default "dbg : dbg_dwarf2".
>>
>>The AVR has problems with dbg_dwarf2 ? If not, could you please
>> change the AVR systeminfo to dwarf2 also for consistency ?
>>
>
> That was a fix for compiling controller units with lots of symbols, refer
> to this discussion thread:
> https://www.mail-archive.com/fpc-devel@lists.freepascal.org/msg35416.html
> Dwarf2 is fine in general, unless the address (I think address in dwarf
> debug section, the details are a bit hazy in my memory) of symbols exceed
> 65535. Dwarf3 offers a larger data type for this scenario.
>
>  I'm using ppcrossavr with systeminfo default "dbg : dbg_dwarf2" with no
> problems. If I remember correctly, IMHO, fixing the issue 33914 (
> https://bugs.freepascal.org/view.php?id=33914 ) had the collateral effect
> to fixing also the above.
>
>  For test, I just debugged a physical atmega32u2 mcu with Lazarus with no
> problems at all. Also for test, I builded an avr35 subarch ppcrossavr and
> also debugged a physical atmega32u2 mcu with no problems.
>

You are probably right, I never checked if the pointer change of #33914
also fixed the original issue in the mailing list so the default dwarf
version for AVR could be changed back to 2.  But then Florian does have a
point, why not make the default for all targets dwarf 3?
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Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-10 Thread Florian Klämpfl via fpc-devel 


> Am 10.02.2021 um 11:46 schrieb Dimitrios Chr. Ioannidis via fpc-devel 
> :
> 
> Hi,
> 
>   I read at compiler/systems/i_embed.pas the AVR systeminfo, is the only one 
> that, has as default "dbg : dbg_dwarf3". The other embed systems that uses 
> dwarf ( ARM, MIPSEL, i8086, m68k, RISCV32/64, XTENSA, Z80 ), all have as 
> default "dbg : dbg_dwarf2".
> 
>   The AVR has problems with dbg_dwarf2 ? If not, could you please change the 
> AVR systeminfo to dwarf2 also for consistency ?

Actually, the others should be better changed to dwarf3. Dwarf3 should be 
widely usable meanwhile, but maybe Martin can shed light on it.

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Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-10 Thread Dimitrios Chr. Ioannidis via fpc-devel 

Hi,

Στις 10/2/2021 2:25 μ.μ., ο/η Christo Crause έγραψε:
On Wed, Feb 10, 2021 at 12:47 PM Dimitrios Chr. Ioannidis via 
fpc-devel > wrote:


Hi,

   I read at compiler/systems/i_embed.pas the AVR systeminfo, is the
only one that, has as default "dbg : dbg_dwarf3". The other embed
systems that uses dwarf ( ARM, MIPSEL, i8086, m68k, RISCV32/64,
XTENSA,
Z80 ), all have as default "dbg : dbg_dwarf2".

   The AVR has problems with dbg_dwarf2 ? If not, could you please
change the AVR systeminfo to dwarf2 also for consistency ?


That was a fix for compiling controller units with lots of symbols, 
refer to this discussion thread: 
https://www.mail-archive.com/fpc-devel@lists.freepascal.org/msg35416.html 

Dwarf2 is fine in general, unless the address (I think address in 
dwarf debug section, the details are a bit hazy in my memory) of 
symbols exceed 65535. Dwarf3 offers a larger data type for this scenario.


 I'm using ppcrossavr with systeminfo default "dbg : dbg_dwarf2" with 
no problems. If I remember correctly, IMHO, fixing the issue 33914 ( 
https://bugs.freepascal.org/view.php?id=33914 ) had the collateral 
effect to fixing also the above.


 For test, I just debugged a physical atmega32u2 mcu with Lazarus with 
no problems at all. Also for test, I builded an avr35 subarch ppcrossavr 
and also debugged a physical atmega32u2 mcu with no problems.


ppcrossavr ( from trunk ) builded on Windows 10 x64  ( with avr binutils 
2.34  from https://blog.zakkemble.net/avr-gcc-builds/ ) :


make.exe clean crossall crossinstall CPU_TARGET=avr OS_TARGET=embedded 
SUBARCH=avr35 INSTALL_PREFIX=G:\Programming\dimitris\tools\
fpc-trunk CROSSOPT="-g -godwarfsets -gw2 -O1 -dDEBUG" 
CROSSBINDIR=G:\Programming\dimitris\tools\fpc-trunk\bin\x86_64-win64 
BINUTILSPREFIX=avr-embedded-


regards,

--

Dimitrios Chr. Ioannidis

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Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-10 Thread Christo Crause via fpc-devel 
On Wed, Feb 10, 2021 at 12:47 PM Dimitrios Chr. Ioannidis via fpc-devel <
fpc-devel@lists.freepascal.org> wrote:

> Hi,
>
>I read at compiler/systems/i_embed.pas the AVR systeminfo, is the
> only one that, has as default "dbg : dbg_dwarf3". The other embed
> systems that uses dwarf ( ARM, MIPSEL, i8086, m68k, RISCV32/64, XTENSA,
> Z80 ), all have as default "dbg : dbg_dwarf2".
>
>The AVR has problems with dbg_dwarf2 ? If not, could you please
> change the AVR systeminfo to dwarf2 also for consistency ?
>

That was a fix for compiling controller units with lots of symbols, refer
to this discussion thread:
https://www.mail-archive.com/fpc-devel@lists.freepascal.org/msg35416.html
Dwarf2 is fine in general, unless the address (I think address in dwarf
debug section, the details are a bit hazy in my memory) of symbols exceed
65535. Dwarf3 offers a larger data type for this scenario.
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Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-10 Thread Dimitrios Chr. Ioannidis via fpc-devel 

Hi,

  sorry for the noise ... ( again )

  My mail client messed up the "To:" labels and I thought that I mailed 
directly to C Western...


  Apologies.

regards,

--

Dimitrios Chr. Ioannidis

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Re: [fpc-devel] AVR systeminfo defaults to dwarf 3

2021-02-10 Thread Dimitrios Chr. Ioannidis via fpc-devel 

Hi,

  I'm sorry for noise. This was intended for the fpc-devel list. Apologies.

Στις 10/2/2021 12:47 μ.μ., ο/η Dimitrios Chr. Ioannidis έγραψε:

Hi,

  I read at compiler/systems/i_embed.pas the AVR systeminfo, is the 
only one that, has as default "dbg : dbg_dwarf3". The other embed 
systems that uses dwarf ( ARM, MIPSEL, i8086, m68k, RISCV32/64, 
XTENSA, Z80 ), all have as default "dbg : dbg_dwarf2".


  The AVR has problems with dbg_dwarf2 ? If not, could you please 
change the AVR systeminfo to dwarf2 also for consistency ?


regards,



regards,

--

Dimitrios Chr. Ioannidis

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