- /* Can't use local-exec relocations in shared libraries. */
- if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared)
- return TRUE;
-
- if (r_type == R_ALPHA_LITERAL)
- disp = symval - info->gp;
- else
- {
- bfd_vma dtp_base, tp_base;
-
- BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
- dtp_base = alpha_get_dtprel_base (info->link_info);
- tp_base = alpha_get_tprel_base (info->link_info);
- disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
- }
-
- if (disp < -0x8000 || disp >= 0x8000)
- return TRUE;
-
- /* Exchange LDQ for LDA. In the case of the TLS relocs, we're loading
- a constant, so force the base register to be $31. */
- if (r_type == R_ALPHA_LITERAL)
- insn = (OP_LDA << 26) | (insn & 0x03ff0000);
- else
- insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
- info->changed_contents = TRUE;
-
- /* Reduce the use count on this got entry by one, possibly
- eliminating it. */
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (r_type);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
- }
-
- /* Smash the existing GOT relocation for its 16-bit immediate pair. */
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- r_type = R_ALPHA_GPREL16;
- break;
- case R_ALPHA_GOTDTPREL:
- r_type = R_ALPHA_DTPREL16;
- break;
- case R_ALPHA_GOTTPREL:
- r_type = R_ALPHA_TPREL16;
- break;
- default:
- BFD_ASSERT (0);
- return FALSE;
- }
-
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
- info->changed_relocs = TRUE;
-
- /* ??? Search forward through this basic block looking for insns
- that use the target register. Stop after an insn modifying the
- register is seen, or after a branch or call.
-
- Any such memory load insn may be substituted by a load directly
- off the GP. This allows the memory load insn to be issued before
- the calculated GP register would otherwise be ready.
-
- Any such jsr insn can be replaced by a bsr if it is in range.
-
- This would mean that we'd have to _add_ relocations, the pain of
- which gives one pause. */
-
- return TRUE;
-}
-
-static bfd_boolean
-elf64_alpha_relax_gprelhilo (info, symval, irel, hi)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel;
- bfd_boolean hi;
-{
- unsigned int insn;
- bfd_signed_vma disp;
- bfd_byte *pos = info->contents + irel->r_offset;
-
- /* ??? This assumes that the compiler doesn't render
-
- array[i]
- as
- ldah t, array(gp) !gprelhigh
- s8addl i, t, t
- ldq r, array(t) !gprellow
-
- which would indeed be the most efficient way to implement this. */
-
- return TRUE;
-
- disp = symval - info->gp;
- if (disp < -0x8000 || disp >= 0x8000)
- return TRUE;
-
- if (hi)
- {
- /* Nop out the high instruction. */
-
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos);
- info->changed_contents = TRUE;
-
- irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- irel->r_addend = 0;
- info->changed_relocs = TRUE;
- }
- else
- {
- /* Adjust the low instruction to reference GP directly. */
-
- insn = bfd_get_32 (info->abfd, pos);
- insn = (insn & 0xffe00000) | (29 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos);
- info->changed_contents = TRUE;
-
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPREL16);
- info->changed_relocs = TRUE;
- }
-
- return TRUE;
-}
-
-static bfd_boolean
-elf64_alpha_relax_tls_get_addr (info, symval, irel, is_gd)
- struct alpha_relax_info *info;
- bfd_vma symval;
- Elf_Internal_Rela *irel;
- bfd_boolean is_gd;
-{
- bfd_byte *pos[5];
- unsigned int insn;
- Elf_Internal_Rela *gpdisp, *hint;
- bfd_boolean dynamic, use_gottprel, pos1_unusable;
- unsigned long new_symndx;
-
- dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
-
- /* If a TLS symbol is accessed using IE at least once, there is no point
- to use dynamic model for it. */
- if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
- ;
-
- /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
- then we might as well relax to IE. */
- else if (info->link_info->shared && !dynamic
- && (info->link_info->flags & DF_STATIC_TLS))
- ;
-
- /* Otherwise we must be building an executable to do anything. */
- else if (info->link_info->shared)
- return TRUE;
-
- /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
- the matching LITUSE_TLS relocations. */
- if (irel + 2 >= info->relend)
- return TRUE;
- if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
- || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
- || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
- return TRUE;
-
- /* There must be a GPDISP relocation positioned immediately after the
- LITUSE relocation. */
- gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
- irel[2].r_offset + 4, R_ALPHA_GPDISP);
- if (!gpdisp)
projects / deliverable / binutils-gdb.git / blobdiff