Sometimes when I add a bit of code and build I get an error message
during linking:

***********************************************************
     IAR Universal Linker V4.56E/386
     Copyright 1987-2003 IAR Systems. All rights reserved.
Internal Error: In function: unknown
Diagnostic: unexpected exception
P0: 1    P1: 0
***********************************************************


Compiler version is:   IAR MSP430 C Compiler V2.21B/W32

It seems to be possibly related to constant char strings ("like this")
but I am not sure.  I can add or comment out code to get rid of the
error.  For instance I have the code in a state where with a section
like:

   if(fDumpDebug)
   {
     DumpDebugString("Debugs enabled", 14);
   }

generates the link error but 

   if(fDumpDebug)
   {
     DumpDebugString("Debugs enabled", 14);
     DumpDebugString("Debugs enabled", 14);
   }

does not.

There is more to it than I have shown but this gives the idea.  The
code above would probably compile OK by itself - it seems to depend on
how many other constant char strings there are. The above is just a
very cut down example.

I am generating debug information (both compile and link).  Target is
 'F147. I am no where near filling code space.

Any ideas?

This may be related to odd/even addressing. Using "" around
strings adds 
a 0 to the end of the string, whereas  using ' ' around strings does 
not. It may well be that the linker isn't correcting for these when they 
are inlined with code. This is certaily a problem with assembler.

Al

joeblogss84 wrote:

> Sometimes when I add a bit of code and build I get
an error message
> during linking:
> 
> ***********************************************************
>      IAR Universal Linker V4.56E/386
>      Copyright 1987-2003 IAR Systems. All rights reserved.
> Internal Error: In function: unknown
> Diagnostic: unexpected exception
> P0: 1    P1: 0
> ***********************************************************
> 
> 
> Compiler version is:   IAR MSP430 C Compiler V2.21B/W32
> 
> It seems to be possibly related to constant char strings ("like
this")
> but I am not sure.  I can add or comment out code to get rid of the
> error.  For instance I have the code in a state where with a section
> like:
> 
>    if(fDumpDebug)
>    {
>      DumpDebugString("Debugs enabled", 14);
>    }
> 
> generates the link error but 
> 
>    if(fDumpDebug)
>    {
>      DumpDebugString("Debugs enabled", 14);
>      DumpDebugString("Debugs enabled", 14);
>    }
> 
> does not.
> 
> There is more to it than I have shown but this gives the idea.  The
> code above would probably compile OK by itself - it seems to depend on
> how many other constant char strings there are. The above is just a
> very cut down example.
> 
> I am generating debug information (both compile and link).  Target is
>  'F147. I am no where near filling code space.
> 
> Any ideas?
> 
> 
> 
> 
> .
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 

joeblogss84 wrote:

> Sometimes when I add a bit of code and build I get
an error message
> during linking:

>
***********************************************************
>      IAR Universal Linker V4.56E/386
>      Copyright 1987-2003 IAR Systems. All rights reserved.
> Internal Error: In function: unknown
> Diagnostic: unexpected exception
> P0: 1    P1: 0
> ***********************************************************

> Compiler version is:   IAR MSP430 C Compiler
V2.21B/W32
> [...]
> Any ideas?

Unfortunately this seems to be a tricky, non-reproducable bug in IAR's
compiler and/or linker.
I also encountered this message quite frequently, once the programm
had reached a certain degree of compexity.

But from my point of view, the occurence of this bug has nothing to do
with a certain code you write.  The behaviour is rather chaotic.

Once you got this message, any smallest change makes it disappear,
even if this change does not change the assembly code at all.

I had situations where changing "int a, b;" to "int b, a;"
solved the
problem.

From my experience it should be no problem to just ignore this bug and
do some minor cosmetic changes to your code as a workaround.

Regards
Dirk

IAR's response 22.3.2004: "This should not occure, please try to
use 
the new version of our Linker, http://www.iar.com/Support/?note492
"


>
***********************************************************
>      IAR Universal Linker V4.56E/386
>      Copyright 1987-2003 IAR Systems. All rights reserved.
> Internal Error: In function: unknown
> Diagnostic: unexpected exception
> P0: 1    P1: 0
> ***********************************************************

Maybe it sounds strange, I had this problem also, but only if I had
started (by mistake) the Embedded Workbench twice.

Stefan


--- In msp430@msp4..., "joeblogss84" <i.wilson@c...> wrote:
> Sometimes when I add a bit of code and build I get
an error message
> during linking:
> 
> ***********************************************************
>      IAR Universal Linker V4.56E/386
>      Copyright 1987-2003 IAR Systems. All rights reserved.
> Internal Error: In function: unknown
> Diagnostic: unexpected exception
> P0: 1    P1: 0
> ***********************************************************
> 
> 
> Compiler version is:   IAR MSP430 C Compiler V2.21B/W32
> 
> It seems to be possibly related to constant char strings ("like
this")
> but I am not sure.  I can add or comment out code to get rid of the
> error.  For instance I have the code in a state where with a section
> like:
> 
>    if(fDumpDebug)
>    {
>      DumpDebugString("Debugs enabled", 14);
>    }
> 
> generates the link error but 
> 
>    if(fDumpDebug)
>    {
>      DumpDebugString("Debugs enabled", 14);
>      DumpDebugString("Debugs enabled", 14);
>    }
> 
> does not.
> 
> There is more to it than I have shown but this gives the idea.  The
> code above would probably compile OK by itself - it seems to depend on
> how many other constant char strings there are. The above is just a
> very cut down example.
> 
> I am generating debug information (both compile and link).  Target is
>  'F147. I am no where near filling code space.
> 
> Any ideas?