https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968
--- Comment #41 from rguenther at suse dot de <rguenther at suse dot de> --- On Tue, 2 Jan 2018, ro at CeBiTec dot Uni-Bielefeld.DE wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81968 > > --- Comment #40 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot > Uni-Bielefeld.DE> --- > > --- Comment #39 from Richard Biener <rguenth at gcc dot gnu.org> --- > [...] > >> * On x86, of the previous 32 ld: fatal: has invalid sh_info errors, 16 > >> are now gone. > >> > >> However, I've many (1284 in g++.log) instances of > >> > >> ld: warning: symbol .symtab[2] has invalid section index; ignored: > >> (file /var/tmp//ccyttLYbdebugobjtem value=9); > >> > >> Those links end with > >> > >> ld: fatal: file /var/tmp//ccyttLYbdebugobjtem: section > >> [6].rel.gnu.debuglto_.debug_info: has invalid sh_info: 9 > >> > >> and ld SEGVing, again in the ld -r step. > >> > >> The warnings are from symtab entries like > >> > >> Symbol Table Section: .symtab > >> index value size type bind oth ver shndx name > >> [0] 0 0 NOTY LOCL D 0 UNDEF > >> [1] 0 0 FILE LOCL D 0 ABS pr42987_0.C > >> [2] 0 0 NOTY LOCL D 0 9 > >> > >> and section 9 doesn't exist, where the input object (cp_lto_pr42987_0.o) > >> has > > > > Just guessing that it maybe doesn't like NOTYPE on local defs? I would > > I don't think so. With your patch, the affected symbols are SECT > instead of LOCL, otherwise no difference. > > > expect that before the partial link step that section 9 would exist. > > It does indeed as I mentioned (cp_lto_pr42987_0.o is the input object > corresponding to ccyttLYbdebugobjtem). > > > Does > > > > Index: libiberty/simple-object-elf.c > > =================================================================== > > --- libiberty/simple-object-elf.c (revision 256070) > > +++ libiberty/simple-object-elf.c (working copy) > > @@ -1400,9 +1400,9 @@ simple_object_elf_copy_lto_debug_section > > gnu_lto - strings); > > ELF_SET_FIELD (type_functions, ei_class, Sym, > > ent, st_shndx, Elf_Half, > > SHN_UNDEF); > > + *st_info = ELF_ST_INFO (bind, STT_NOTYPE); > > } > > *st_other = other; > > - *st_info = ELF_ST_INFO (bind, STT_NOTYPE); > > ELF_SET_FIELD (type_functions, ei_class, Sym, > > ent, st_value, Elf_Addr, 0); > > ELF_SET_FIELD (type_functions, ei_class, Sym, > > > > fix these errors? > > Unfortunately not: it's really the section index pointing to the > non-existing (i.e. eliminated) .gnu.debuglto_.debug_info section. But that section shouldn't be eliminated :/
