binutils/bfd/elf32-ppc.c

60 /* For new-style .glink and .plt.  */
64 /* VxWorks uses its own plt layout, filled in by the static linker.  */
121    .rela.plt.unloaded, for the kernel loader.  */
1730   /* Flags used to auto-detect plt type.  */
1902 		     const asection *plt ATTRIBUTE_UNUSED,
1980   { STRING_COMMA_LEN (".plt"),             0, SHT_NOBITS,   SHF_ALLOC + SHF_EXECINSTR },
1992 /* This is what we want for new plt/got.  */
1994   { STRING_COMMA_LEN (".plt"),             0, SHT_PROGBITS, SHF_ALLOC };
2347     } plt;
2414   asection *plt;
2423   /* The (unloaded but important) .rela.plt.unloaded on VxWorks.  */
2426   /* The .got.plt section (VxWorks only)*/
2561       htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2635   htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2636   htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2715   /* And plt entries.  */
2716   if (eind->elf.plt.plist != NULL)
2718       if (edir->elf.plt.plist != NULL)
2723 	  for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2727 	      for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2730 		    dent->plt.refcount += ent->plt.refcount;
2737 	  *entp = edir->elf.plt.plist;
2740       edir->elf.plt.plist = eind->elf.plt.plist;
2741       eind->elf.plt.plist = NULL;
2991   for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3000       ent->next = h->plt.plist;
3003       ent->plt.refcount = 0;
3004       h->plt.plist = ent;
3006   ent->plt.refcount += 1;
3017   for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3465 	      /* We may need a plt entry if the symbol turns out to be
3756 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3779 	     Use the old style bss plt if a file makes plt calls
3781 	     --secure-plt and we never see REL16 relocs.  */
3800     info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3812       if (htab->plt != NULL
3813 	  && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3853 /* Update the got, plt and dynamic reloc reference counts for the
3979 	      if (ent->plt.refcount > 0)
3980 		ent->plt.refcount -= 1;
4001       && htab->plt != NULL
4002       && htab->plt->output_section != NULL)
4004       elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4005       elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4132 			if (ent != NULL && ent->plt.refcount > 0)
4133 			  ent->plt.refcount -= 1;
4240 	 won't need a .plt entry.  */
4242       for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4243 	if (ent->plt.refcount > 0)
4260 	  h->plt.plist = NULL;
4266     h->plt.plist = NULL;
4365 /* Generate a symbol to mark plt call stubs.  For non-PIC code the sym is
4367    specifying the addend on the plt relocation.  For -fpic code, the sym
4480       for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4481 	if (ent->plt.refcount > 0)
4494 		asection *s = htab->plt;
4503 		    ent->plt.offset = plt_offset;
4528 			/* If this is the first .plt entry, make room
4546 			   in the .plt.  This is required to make
4566 		    ent->plt.offset = plt_offset;
4569 		/* We also need to make an entry in the .rela.plt section.  */
4579 			    if (ent->plt.offset
4593 			   .got.plt.  */
4600 	      ent->plt.offset = (bfd_vma) -1;
4603 	  ent->plt.offset = (bfd_vma) -1;
4607 	  h->plt.plist = NULL;
4613       h->plt.plist = NULL;
4681 	 resolve directly to the function rather than going via the plt.
4923 	 for old plt/got the got size will be 0 to 32764 (not allocated),
4924 	 or 32780 to 65536 (header allocated).  For new plt/got, the
4992       if (s == htab->plt
5003 	  if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5035 	     .rela.plt.  We must create both sections in
5071       if (htab->plt != NULL && htab->plt->size != 0)
5260 	      && htab->plt != NULL)
5273 		      tsec = htab->plt;
5274 		      toff = ent->plt.offset;
5380 	  if (tsec == htab->plt
6497 	      relocation = (htab->plt->output_section->vma
6498 			    + htab->plt->output_offset
6499 			    + ent->plt.offset);
6573 		|| htab->plt == NULL)
6587 	      relocation = (htab->plt->output_section->vma
6588 			    + htab->plt->output_offset
6589 			    + ent->plt.offset);
6897   for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6898     if (ent->plt.offset != (bfd_vma) -1)
6907 	      reloc_index = ent->plt.offset / 4;
6910 		reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6924 		/* The first three entries in .got.plt are reserved.  */
6931 		/* Fill in the .plt on VxWorks.  */
6939 				htab->plt->contents + ent->plt.offset + 0);
6942 				htab->plt->contents + ent->plt.offset + 4);
6956 				htab->plt->contents + ent->plt.offset + 0);
6959 				htab->plt->contents + ent->plt.offset + 4);
6963 			    htab->plt->contents + ent->plt.offset + 8);
6965 			    htab->plt->contents + ent->plt.offset + 12);
6969 		   start of the .rela.plt section.  The value is stored in the
6975 			    htab->plt->contents + ent->plt.offset + 16);
6984 			     | (-(ent->plt.offset + 20) & 0x03fffffc)),
6985 			    htab->plt->contents + ent->plt.offset + 20);
6987 			    htab->plt->contents + ent->plt.offset + 24);
6989 			    htab->plt->contents + ent->plt.offset + 28);
6994 		bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6995 					 + htab->plt->output_offset
6996 					 + ent->plt.offset + 16),
7001 		    /* Fill in a couple of entries in .rela.plt.unloaded.  */
7008 		    rela.r_offset = (htab->plt->output_section->vma
7009 				     + htab->plt->output_offset
7010 				     + ent->plt.offset + 2);
7018 		    rela.r_offset = (htab->plt->output_section->vma
7019 				     + htab->plt->output_offset
7020 				     + ent->plt.offset + 6);
7028 		       PLT slot.  Point it at the middle of the .plt entry.  */
7034 		    rela.r_addend = ent->plt.offset + 16;
7050 		rela.r_offset = (htab->plt->output_section->vma
7051 				 + htab->plt->output_offset
7052 				 + ent->plt.offset);
7055 		    /* We don't need to fill in the .plt.  The ppc dynamic
7060 		    bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7064 				htab->plt->contents + ent->plt.offset);
7068 	    /* Fill in the entry in the .rela.plt section.  */
7079 		   the .plt section.  Leave the value alone.  */
7093 	    bfd_vma plt;
7096 	    plt = (ent->plt.offset
7097 		   + htab->plt->output_section->vma
7098 		   + htab->plt->output_offset);
7114 		plt -= got;
7116 		if (plt + 0x8000 < 0x10000)
7118 		    bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7129 		    bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7131 		    bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7141 		bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7143 		bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7242     splt = bfd_get_section_by_name (dynobj, ".plt");
7256       BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7273 		s = htab->plt;
7367 	  rela.r_offset = (htab->plt->output_section->vma
7368 			   + htab->plt->output_offset
7376 	  rela.r_offset = (htab->plt->output_section->vma
7377 			   + htab->plt->output_offset
7420        *   addis 11,30,(plt+(i-1)*4-got)@ha
7421        *   lwz 11,(plt+(i-1)*4-got)@l(11)
7425        * # A table of branches, one for each plt entry.
7426        * # The idea is that the plt call stub loads ctr (and r11) with these
7427        * # addresses, so (r11 - res_0) gives the plt index * 4.
7497       /* Build the branch table, one for each plt entry (less one),
7666 /* VxWorks uses the elf default section flags for .plt.  */
7673   if (strcmp (sec->name, ".plt") == 0)