Problem for using __attribute__((section(".text")))

Arnaud Lacombe lacombar@gmail.com
Fri Sep 10 05:04:00 GMT 2010


Hi,

On Thu, Sep 9, 2010 at 9:52 PM, Heyu Zhu <zhu.heyu@gmail.com> wrote:
> Hi everyone,
>
> File boot.c is like below:
>
>          int val[] __attribute__ ((section(".text"))) = {1, 2, 3, 4, 5 ,6};
>          int getval(int i) {
>               return val[i];
>          }
>
> Then i compile it use gcc-4.2.4 and binutils2.20
>
>        arm-elf-gcc boot.c -c -o boot.o
>
> It gives a warning:
>
>   /tmp/ccIlHjum.s: Assembler message:
>   /tmp/ccIlHjum.s:4: Warning: ignoring changed section attributes for .text
>
> What's wrong?  What should i do to remove the warning?
>
AFAIR, "__attribute__ ((section(".text")))" will make gcc emits
`,"aw",@progbits' after the '.text' to alter the section attributes.
If you use: "__attribute__ ((section(".text#")))" (notice the extra
'#') this suffix will be commented in the assembly and the warning
will disappear.

 - Arnaud



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