Section alignment with the linker
The linker ensures each input section starts at an address that is a multiple of the input section alignment.
When input sections have been ordered and before the base addresses are fixed, armlink inserts padding, if required, to force each input section to start at an address that is a multiple of the input section alignment.
armlink supports strict conformance with the ELF
specification with the default option
The linker faults the base address of a region if it is not aligned so padding might be
inserted to ensure compliance. With
region alignment is the maximum alignment of any input section contained by the
If you use the option
linker permits ELF program headers and output sections to be aligned on a four-byte
boundary regardless of the maximum alignment of the input sections. This enables armlink to minimize the amount of padding that it inserts into
If you are using scatter-loading, you can increase the alignment of a load
region or execution region with the
ALIGN attribute. For
example, you can change an execution region that is normally four-byte aligned to be
eight-byte aligned. However, you cannot reduce the natural alignment. For example, you
cannot force two-byte alignment on a region that is normally four-byte aligned.