Behavior when .ANY sections overflow because of linker-generated content
Because linker-generated content might cause
.ANY regions to overflow, a contingency algorithm is included in the linker.
The linker does not know the address of a section until it is assigned to a
region. Therefore, when filling
.ANY regions, the linker
cannot calculate the contingency space and cannot determine if calling functions require
veneers. The linker provides a contingency algorithm that gives a worst-case estimate for
padding and an additional two percent for veneers. To enable this algorithm use the
--any_contingency command-line option.
The following diagram represents the notional image layout during
Figure 8-5 .ANY contingency
The downward arrows for prospective padding show that the prospective padding continues to
grow as more sections are added to the
Prospective padding is dealt with before the two percent veneer contingency.
When the prospective padding is cleared the priority is set to zero. When the two percent is cleared the priority is decremented again.
You can also use the
ANY_SIZE keyword on an execution region to specify
the maximum amount of space in the region to set aside for