I am trying to understand some parts of the linker files provided. As an example, the one in *openmsp430/fpga/xilinx_diligent_s3board/software/hw_uart*. Especially the part below. What is its purpose. Moreover why are there two linker files in this directory.

SECTIONS
{
__interrupt_vector_1 : { KEEP (*(__interrupt_vector_1 )) } > VECT1
__interrupt_vector_2 : { KEEP (*(__interrupt_vector_2 )) } > VECT2
__interrupt_vector_3 : { KEEP (*(__interrupt_vector_3 )) KEEP (*(__interrupt_vector_port1)) } > VECT3
__interrupt_vector_4 : { KEEP (*(__interrupt_vector_4 )) KEEP (*(__interrupt_vector_port2)) } > VECT4
__interrupt_vector_5 : { KEEP (*(__interrupt_vector_5 )) } > VECT5
__interrupt_vector_6 : { KEEP (*(__interrupt_vector_6 )) } > VECT6
__interrupt_vector_7 : { KEEP (*(__interrupt_vector_7 )) } > VECT7
__interrupt_vector_8 : { KEEP (*(__interrupt_vector_8 )) } > VECT8
__interrupt_vector_9 : { KEEP (*(__interrupt_vector_9 )) KEEP (*(__interrupt_vector_timera1)) } > VECT9
__interrupt_vector_10 : { KEEP (*(__interrupt_vector_10)) KEEP (*(__interrupt_vector_timera0)) } > VECT10
__interrupt_vector_11 : { KEEP (*(__interrupt_vector_11)) KEEP (*(__interrupt_vector_wdt)) } > VECT11
__interrupt_vector_12 : { KEEP (*(__interrupt_vector_12)) } > VECT12
__interrupt_vector_13 : { KEEP (*(__interrupt_vector_13)) } > VECT13
__interrupt_vector_14 : { KEEP (*(__interrupt_vector_14)) } > VECT14
__interrupt_vector_15 : { KEEP (*(__interrupt_vector_15)) KEEP (*(__interrupt_vector_nmi)) } > VECT15
__reset_vector :
{
KEEP (*(__interrupt_vector_16))
KEEP (*(__interrupt_vector_reset))
KEEP (*(.resetvec))
} > RESETVEC