separate string and other stuff in const section

Hi,

.const section includes string and some const data stuff. Is that possible
to move string to some other memory without moving const data? Thanks

On Sep 5, 8:46*am, "Jiandong Xu" <jiandong...@nsn.com> wrote:
> Hi,
>
> .const section includes string and some const data stuff. Is that possible
> to move string to some other memory without moving const data? Thanks

There is a missing piece of information here. Can you provide it?

John

Depending on the platform.. look for #pragma or similar compiler directives,
or provide more info about the development environment and target device.
When you search for the directives, keep in mind they may not be #commands..
one compiler I worked with long ago used specifically formatted comments to
control memory layout.

"John" <sampson164@gmail.com> wrote in message
news:6187cd3f-aeb8-4bbb-b5d6-c52b4b14530b@k13g2000hse.googlegroups.com...
On Sep 5, 8:46 am, "Jiandong Xu" <jiandong...@nsn.com> wrote:
> Hi,
>
> .const section includes string and some const data stuff. Is that possible
> to move string to some other memory without moving const data? Thanks

There is a missing piece of information here. Can you provide it?

John

Jiandong Xu wrote:
> Hi,
>
> .const section includes string and some const data stuff. Is that possible
> to move string to some other memory without moving const data? Thanks
>
>

Hi,
Yes.

Nils

Jiandong Xu wrote:

> Hi,
>
> const section includes string and some const data stuff. Is that possible
> to move string to some other memory without moving const data? Thanks

In the most of the embedded compilers, you can explicitly define memory
section for every particular object. Many compilers have an option if
the strings are kept in RAM (as required by C standard) or stored in the
constant memory.


Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com

On Fri, 05 Sep 2008 20:32:53 -0500, Vladimir Vassilevsky
<antispam_bogus@hotmail.com> wrote in comp.dsp:

>
>
> Jiandong Xu wrote:
>
> > Hi,
> >
> > const section includes string and some const data stuff. Is that possible
> > to move string to some other memory without moving const data? Thanks
>
> In the most of the embedded compilers, you can explicitly define memory
> section for every particular object. Many compilers have an option if
> the strings are kept in RAM (as required by C standard) or stored in the
> constant memory.

There is nothing in the C standard that requires all strings to be
stored in RAM. Given:

char *s1 = "string one";
char s2[] = "string two";
const char s3[] = "string three";

....only the character array s2 needs to be stored in RAM. The string
literal and the array of const chars can be stored in read-only memory
or in RAM.

--
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://c-faq.com/
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.club.cc.cmu.edu/~ajo/docs/FAQ-acllc.html

Jack Klein wrote:
(snip)

> There is nothing in the C standard that requires all strings to be
> stored in RAM.

In K&R C, string constants were writable. That ability
was removed in ANSI C, but many compilers support it for
back compatibility.

> Given:

> char *s1 = "string one";
> char s2[] = "string two";
> const char s3[] = "string three";

> ...only the character array s2 needs to be stored in RAM. The string
> literal and the array of const chars can be stored in read-only memory
> or in RAM.

-- glen

Thanks for your reply.

sure, it is TI compiler: TI C6000 Code Generation Tools: v6.0.5, from Code
Composer Studio v3.3

I do remember some compilers can put string section somewhere. But I can't
find any information from TI manual.

>Depending on the platform.. look for #pragma or similar compiler
directives,
>or provide more info about the development environment and target device.

>When you search for the directives, keep in mind they may not be
#commands..
>one compiler I worked with long ago used specifically formatted comments
to
>control memory layout.
>
>"John" <sampson164@gmail.com> wrote in message
>news:6187cd3f-aeb8-4bbb-b5d6-c52b4b14530b@k13g2000hse.googlegroups.com...
>On Sep 5, 8:46 am, "Jiandong Xu" <jiandong...@nsn.com> wrote:
>> Hi,
>>
>> .const section includes string and some const data stuff. Is that
possible
>> to move string to some other memory without moving const data? Thanks
>
>There is a missing piece of information here. Can you provide it?
>
>John
>
>
>