Hi Glynn,
On Tue, May 24, 2011 at 1:48 PM, Glynn Clements
<glynn@xxxxxxxxxxxxxxxxxx> wrote:
>
> Fawad Lateef wrote:
>
>> For now I added two more temporary arguments between 1st and 2nd
>> arguments and the required arguments getting correct values thats
>> why I am assuming that by adding temporary variables we moved the
>> memory corruption from real arguments into temporary arguments.
>> After adding these arguments my function is behaving correctly so
>> for now this is a work-around _but_ I want to figure-out its proper
>> fix (as the same sort of issue we faced in our cgi based web-pages
>> code some weeks earlier).
>>
>> Hence I needs suggestion that is this really a memory corruption or
>> some compiler issues ? If its a compiler issue then its not a big
>> problem but if its memory corruption issue then we have to _fix_ it
>> asap.
>
> Check the assembler output ("gcc -S ...").
>
Nice idea, will look into this.
> Personally, I'd be more inclined to suspect register corruption. Are
> you calling a library function which use a different ABI? E.g. if your
> code is compiled for an ABI where certain registers are preserved but
> calling a function using an ABI which doesn't preserver those
> registers, then you'll have problems.
>
humm, Can you give some suggestion about how to verify this ? Using
readelf or objdump on different libraries and executables can give
some clue ? As we are using some pre-compiled libraries provided by
some stack we are using.
Thanks for the help.
Regards,
Fawad Lateef
> --
> Glynn Clements <glynn@xxxxxxxxxxxxxxxxxx>
>
--
To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
