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macppc ld.so: move check for unsupported PLT
> Date: Fri, 21 Aug 2026 18:00:55 -0400
> From: George Koehler <kernigh@gmail.com>
>
> Pike from https://pike.lysator.liu.se gave a strange error on macppc,
>
> $ pike --features
> ld.so: pike: unsupported insecure BSS PLT object
> Killed
>
> The PLT is for relocating function calls. The old BSS PLT for powerpc
> is extinct. Pike used ld -nostartmodules to link a module with no
> function calls. This module has no PLT, and ld.so confused the
> absence of a PLT with the presence of a BSS PLT. This diff fixes it
> by moving the check for the secure PLT (if PPC_GOT is nonzero) after
> the check for any kind of PLT (if PLTREL is RELA). Now pike doesn't
> die, but if I make a BSS PLT, it still dies:
>
> $ cc -fuse-ld=bfd -Wl,--bss-plt -o here here.c
> $ ./here
> ld.so: here: unsupported insecure BSS PLT object
> Killed
>
> ok to commit?
ok kettenis@
> Index: powerpc/rtld_machine.c
> ===================================================================
> RCS file: /cvs/src/libexec/ld.so/powerpc/rtld_machine.c,v
> diff -u -p -r1.73 rtld_machine.c
> --- powerpc/rtld_machine.c 16 Jul 2026 11:21:37 -0000 1.73
> +++ powerpc/rtld_machine.c 21 Aug 2026 01:59:18 -0000
> @@ -74,9 +74,6 @@ _dl_md_reloc(elf_object_t *object, int r
> if (relrel > numrela)
> _dl_die("relcount > numrel: %ld > %d", relrel, numrela);
>
> - if (object->Dyn.info[DT_PROC(DT_PPC_GOT)] == 0)
> - _dl_die("unsupported insecure BSS PLT object");
> -
> /* tight loop for leading RELATIVE relocs */
> for (i = 0; i < relrel; i++, relas++) {
> Elf_Addr *r_addr;
> @@ -273,6 +270,9 @@ _dl_md_reloc_got(elf_object_t *object, i
>
> if (object->Dyn.info[DT_PLTREL] != DT_RELA)
> return 0;
> +
> + if (object->Dyn.info[DT_PROC(DT_PPC_GOT)] == 0)
> + _dl_die("unsupported insecure BSS PLT object");
>
> if (!lazy) {
> fails = _dl_md_reloc(object, DT_JMPREL, DT_PLTRELSZ);
>
>
macppc ld.so: move check for unsupported PLT