Internal handling of interrupt vectors and jump table

Hi,

can someone explain how interrupt vectors are handled in gcc internally?

OK, I saw that in  /opt/avr_5.2.0/lib/gcc/avr/5.2.0/../../../../avr/lib/avr5/crtatmega32.o

the empty vector table is included, like:

Disassembly of section .vectors:
00000000 <__vectors>:
0:   0c 94 00 00     jmp     0       ; 0x0 <__vectors>
4:   0c 94 00 00     jmp     0       ; 0x0 <__vectors>
8:   0c 94 00 00     jmp     0       ; 0x0 <__vectors>

And I also can see, that my code results in:

Disassembly of section .text:
00000000 <__vector_7>:
...

but where can I see that __vector_7 goes to the correct place in the table?

I can't see the relocations nor the symbols for that! Is this hardcoded somewhere in binutils?

It would be nice that someone can give me some hints to where I can find the details of getting the vectors into the table.

Thanks!

Klaus