Basically, I was hoping (maybe my fault?) that "volatile const" data would go to .rodata segment.
As described in the example for array1, that is not the case.
The example show array2, but to stop an asm message changing attribute of a section I need the dirty trick of array3.
I did not noticed that with previous compiler version.


etienne@debian-testing:~/projet$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i486-linux-gnu/4.6/lto-wrapper
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.6.1-15' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++,go --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-objc-gc --enable-targets=all --with-arch-32=i586 --with-tune=generic --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
Thread model: posix
gcc version 4.6.1 (Debian 4.6.1-15) 
etienne@debian-testing:~/projet$ cat text.c 
volatile const unsigned array1[3] = { 1, 2, 3 };
volatile const unsigned array2[3] __attribute__ ((section(".rodata"))) = { 1, 2, 3 };
volatile const unsigned array3[3] __attribute__ ((section(".rodata #"))) = { 1, 2, 3 };
etienne@debian-testing:~/projet$ gcc -S text.c -o -
	.file	"text.c"
	.globl	array1
	.data
	.align 4
	.type	array1, @object
	.size	array1, 12
array1:
	.long	1
	.long	2
	.long	3
	.globl	array2
	.section	.rodata,"aw",@progbits
	.align 4
	.type	array2, @object
	.size	array2, 12
array2:
	.long	1
	.long	2
	.long	3
	.globl	array3
	.section	.rodata #,"aw",@progbits
	.align 4
	.type	array3, @object
	.size	array3, 12
array3:
	.long	1
	.long	2
	.long	3
	.ident	"GCC: (Debian 4.6.1-15) 4.6.1"
	.section	.note.GNU-stack,"",@progbits
etienne@debian-testing:~/projet$