-------- Original-Nachricht --------
> Datum: Sun, 18 Dec 2011 22:21:55 +0100
> Von: "Petr Hluzín" <petr.hlu...@gmail.com>
> An: Klaus Rudolph <lts-rudo...@gmx.de>
> CC: "D. Laszlo Sitzer" <dlsit...@googlemail.com>, simulavr-devel@nongnu.org
> Betreff: Re: [Simulavr-devel] build fails
> On 14 December 2011 17:11, Klaus Rudolph <lts-rudo...@gmx.de> wrote:
> >
> > The problem with mi is not really clear to me but could be fixed by
> > removing auto with the correct data type from the iterator needed. I can
> > send a patch tomorrow. I actually could not access my other pc :-)
>
> The "auto" is a feature added in C++11, compiler is required to infer
> the type from the expression. Apparently C++11 is disabled by default
> in GCC.
I know, but I run also into trouble with enabled -std=c++11. Maybe I have used
a wrong compiler version. It was a very fast attempt to get the actual simulavr
running :-)
>
> >
> > But after all fixes I only could do one single step and the simulavr
> > crashes with an exception. Something with SP != 0 ??? Couldn't remember
> > the complete problem.
>
> I am interested in details, preferably a program which reproduces the
> crash.
I hope I could spend some time for avr this weak. If I run again into trouble,
I send a mail to this list with a hopefully much more detailed error message :-)
>
> > The next thing is, that gdb from 7.1 version is longer compatible with
> > simulavr. The disassembler output comes from ram and not longer from
> > flash, which really makes no sense.
>
> I am using gdb-7.3 and disassembly works fine, it reads from flash.
>
So I will describe what I have done:
Running a c/c++ program, target at90s8515. Running "my" very old version of
simulavr. Using a few different versions of gdb und ddd.
In detail:
#include <avr/io.h>
volatile int x;
int main()
{
x=0x1234;
return 0;
}
---------
avr-g++ -mmcu=at90s8515 -g -O3 -o go main.cpp
Version: avr-g++ (GCC) 4.6.1
simulavr -d at90s8515 -g -f ./go ( with my very old version)
ddd -debugger /opt/avr/bin/avr-gdb go
Version of gdb: GNU gdb (GDB) 7.1
Now in ddd:
View->Machine Code Window
Dump of assembler code for function __vectors:
=> 0x00000000 <+0>: rjmp .+24 ; 0x1a <__trampolines_start>
0x00000002 <+2>: rjmp .+78 ; 0x52 <__bad_interrupt>
0x00000004 <+4>: rjmp .+76 ; 0x52 <__bad_interrupt>
0x00000006 <+6>: rjmp .+74 ; 0x52 <__bad_interrupt>
0x00000008 <+8>: rjmp .+72 ; 0x52 <__bad_interrupt>
Look good!
now:
> stepi
Dump of assembler code from 0x80001a to 0x80011a:
0x0080001a: nop
0x0080001c: nop
0x0080001e: nop
0x00800020: nop
0x00800022: nop
0x00800024: nop
Which is simply wrong.
If I use gdb versions 7.0.1 or lower, all works fine!
--------------------
If I use the git-version:
~/work/simulavr_git/simulavr_test001/src/simulavr -d at90s8515 -g -f ./go
After the first stepi I run into:
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x20], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x21], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x22], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x23], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x24], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x25], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x26], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x27], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x40], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x42], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x43], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x46], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x47], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x50], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x51], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x54], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x56], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x57], PC=0x1a
WARNING: file rwmem.cpp: line 115: Invalid read access from IO[0x5c], PC=0x1a
simulavr: hwstack.cpp:282: void ThreadList::OnSPRead(int): Assertion `0 !=
SP_value' failed.
I hope this helps a bit.
Thanks
Klaus
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