gcc.ld does not align .data correctly

[Thomas Preud'homme]

David Robinson reported that gcc.ld as provided in samples/ldscripts does not align the .data section correctly. Indeed, it is assumed by samples/startup/startup_ARMCM0 .s that this section is 4byte aligned. However, the .text section can contain narrow Thumb instructions and thus is only guaranteed to be 4byte aligned.

David proposed the following modification:

                } > FLASH
                */

++ . = ALIGN(4);
                __etext = .;

                .data : AT (__etext)
                {

which fixes the problem for him. Attached file show the difference between a version with and without that patch applied.

[Thomas Preud'homme (thomas-preudhomme)]

The fix has been committed for the next update release.