Linkage Kit Manual V6-00 - Fujitsu

5.4 Combining Sections
5.4 Combining Sections
For a linker, we often write "combining multiple objects" but more accurately we should
write "combining sections in objects".
A section may be combined through a simple connection combination (PUBLIC) and
shared combination (COMMON).
■ Simple Connection Combination of Sections
The REL sections with the same section name and contents type and the combination attribute of PUBLIC
are connected through simple connection combination.
Figure 5.4-1 is an overview of the simple connection combination of the same sections in two object files.
The entire size after combination is the total of the A-1 and A-2 sizes plus the gap size between A-1 and
A-2 generated due to boundary adjustment.
Figure 5.4-1 Simple Connection Combination of Sections
Section A-1
Section A-1
Section A-2
Section A-2
■ Shared Combination of Sections
The REL sections with the same section name and contents type and the combination attribute of
COMMON are connected through shared combination.
Use this function, for example, for a data section without initial values.
Figure 5.4-2 is an overview of shared combination of the same sections in two object files.
The entire size after combination is the larger one of the A-1 and A-2 sizes.
Figure 5.4-2 Shared Combination of Sections
Section A-1
Section A-2
A-1
Section A-2
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