printf of 64bit value on ARM
Tue Nov 29 14:49:00 GMT 2011
Did you make sure to include stdio.h in your test case? This can cause
problems with the variable parameter list. If you have already included
stdio.h, I would suggest debugging _VFPRINTF_R in vprintf.c and
verifying the variable list long long parameter is being passed and
restored correctly on the other end (look at the arg_val union). From
debugging, you should also verify that the long long code was enabled
-- Jeff J.
On 11/27/2011 05:14 PM, Franzi Edo. wrote:
> I am trying to build a newlib for a Cortex M3 ARM capable to support the printf.
> Everything works fine, but I have a strange behavior with the printf of 64bit values.
> If I execute this:
> uint64_t val = 1LL;
> printf("value = %llu\n", val);
> I got: value = 4294967296
> This sounds like a big-little endian problem. Any idea how to solve this problem?
> I uses the newlib 1.19.0 and gcc 4.6.2.
> For the newlib configure I use these switches:
> --enable-newlib-io-long-long \
> --enable-interwork \
> --disable-libgloss \
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