https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106834
--- Comment #10 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Okay, so this should have been reported against Binutils, but since we are
having the conversation here: the current behavior is not good, gas is silently
selecting a different relocation kind for no clear reason. Why is it not a
warning or an error? Note that if you assemble such GOT reference via NASM:
extern _GLOBAL_OFFSET_TABLE_
default rel
f:
mov rax, [_GLOBAL_OFFSET_TABLE_ wrt ..gotpc]
ret
then t.o has
0000000000000000 <f>:
0: 48 8b 05 00 00 00 00 mov 0x0(%rip),%rax # 7 <f+0x7>
3: R_X86_64_GOTPCREL _GLOBAL_OFFSET_TABLE_-0x4
7: c3 ret
and ld -shared --no-relax -o t.so t.o does not reject it and t.so has
0000000000001000 <f>:
1000: 48 8b 05 f1 1f 00 00 mov 0x1ff1(%rip),%rax # 2ff8
<_DYNAMIC+0xe0>
1007: c3 ret
and without --no-relax:
0000000000001000 <f>:
1000: 48 8d 05 f9 1f 00 00 lea 0x1ff9(%rip),%rax # 3000
<_GLOBAL_OFFSET_TABLE_>
1007: c3 ret
So I don't see the reason why it's special-cased in gas.
