Problems with printing double-values with printf and sprintf

[Sebastian Huber]

The problem is in the function dtoa_r() in file dtoa.c line 430. Somehow the
value for _REENT_MP_RESULT(ptr) is to big and arbitrary memory will be overwritten.

Ralf Corsepius wrote:
> On 08/17/2009 12:34 PM, Christian Mauderer wrote:
> 
>> I'm using the newlib 1.17.0 with RTEMS 4.10 patches out of the
>> rtems-4.10-newlib-common-1.17.0-44.suse10.3 rpm.
>>
>> I'm using the following CFLAGS:
>> -mcpu=arm7tdmi-s -mstructure-size-boundary=8 -mapcs-frame -mthumb -Os -g
> 
> Well, that's a lot of obscure flags, of which each may cause your problem.
> 
> => We need to further isolate the problem.
> 
> Can you try to build and excute something similar to this:
> printf( "%f\n", 1.2345 );
> 
> while permuting the CFLAGS you are using, esp.
> -mcpu=arm7tdmi-s, -mapcs-frame and -mthumb?
> 
> Ralf
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Sebastian Huber, embedded brains GmbH

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