On Fri, Jan 22, 2021 at 05:32:43PM -0800, Nick Desaulniers wrote: > > In this specific case, find_func_by_offset returns NULL for > > .text..L.cfi.jumptable.43 at addend 0x8, because Clang doesn't emit > > jump table symbols for static functions: > > > > 0000000000000000 <__typeid__ZTSFjmiE_global_addr>: > > 0: e9 00 00 00 00 jmpq 5 > > <__typeid__ZTSFjmiE_global_addr+0x5> > > 1: R_X86_64_PLT32 io_serial_in-0x4 > > 5: cc int3 > > 6: cc int3 > > 7: cc int3 > > 8: e9 00 00 00 00 jmpq d > > <__typeid__ZTSFjmiE_global_addr+0xd> > > 9: R_X86_64_PLT32 mem32_serial_in-0x4 > > d: cc int3 > > e: cc int3 > > f: cc int3 > > > > Nick, do you remember if there were plans to change this? > > Do you have a link to any previous discussion to help jog my mind; I > don't really remember this one. > > Is it that `__typeid__ZTSFjmiE_global_addr` is the synthesized jump > table, and yet there is no `__typeid__ZTSFjmiE_global_addr` entry in > the symbol table?
I think he means there's not a 'mem32_serial_in.cfi_jt' symbol at '__typeid__ZTSFjmiE_global_addr+8'. Probably more aggressive symbol pruning from the assembler. It's fine though. I just need to rewrite the CFI support a bit. But that can come later. For now I'll just drop the two CFI-related patches from this set so I can merge the others next week. -- Josh
