Re: 3.0 bootstrap failure linux-sparc (gen-num-limits): PATCH

[Benoît Sibaud <benoit dot sibaud at rd dot francetelecom dot com>]

> Same here. Seems to be something with the shared version of libstdc++.  If
> you link static (or link shared against everything but libstdc++, e.g. by
> simply removing libstdc++.so), it is much better.  If I have time, I'll
> take a closer look at it.
Assertion failed in
glibc-2.1.3/glibc-2.1.3/sysdeps/sparc/sparc32/dl-machine.h in this
function [switch case massively snipped].

I think it's the best I can do with my poor knowledge ld.so mecanisms.

##########
/* Perform the relocation specified by RELOC and SYM (which is fully
resolved).
   MAP is the object containing the reloc.  */

static inline void
elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
                  const Elf32_Sym *sym, const struct r_found_version
*version,
                  Elf32_Addr *const reloc_addr)
{
#ifndef RTLD_BOOTSTRAP
  /* This is defined in rtld.c, but nowhere in the static libc.a; make
the
     reference weak so static programs can still link.  This declaration
     cannot be done when compiling rtld.c (i.e.  #ifdef RTLD_BOOTSTRAP)
     because rtld.c contains the common defn for _dl_rtld_map, which is
     incompatible with a weak decl in the same file.  */
  weak_extern (_dl_rtld_map);
#endif

  if (ELF32_R_TYPE (reloc->r_info) == R_SPARC_RELATIVE)
    {
#ifndef RTLD_BOOTSTRAP
      if (map != &_dl_rtld_map) /* Already done in rtld itself. */
#endif
        *reloc_addr += map->l_addr + reloc->r_addend;
    }
  else
    {
      const Elf32_Sym *const refsym = sym;
      Elf32_Addr value;
      if (sym->st_shndx != SHN_UNDEF &&
          ELF32_ST_BIND (sym->st_info) == STB_LOCAL)
        value = map->l_addr;
      else
        {
          value = RESOLVE (&sym, version, ELF32_R_TYPE (reloc->r_info));
          if (sym)
            value += sym->st_value;
        }
      value += reloc->r_addend; /* Assume copy relocs have zero addend. 
*/

      switch (ELF32_R_TYPE (reloc->r_info))
        {
        case R_SPARC_COPY:
        case R_SPARC_GLOB_DAT:
        case R_SPARC_32:
        case R_SPARC_JMP_SLOT:
        case R_SPARC_8:
        case R_SPARC_16:
        case R_SPARC_DISP8:
        case R_SPARC_DISP16:
        case R_SPARC_DISP32:
        case R_SPARC_LO10:
        case R_SPARC_WDISP30:
        case R_SPARC_HI22:
        case R_SPARC_NONE:              /* Alright, Wilbur.  */
        default:
          assert (! "unexpected dynamic reloc type");
          break;
        }
    }
}

--
Benoît Sibaud
R&D Engineer - France Telecom