PowerPC64 localentry:0 plt calls
These don't need a following nop. Also, a localentry:0 plt call marked with an R_PPC64_TOCSAVE reloc should ignore the tocsave. There's no need to save r2 in the prologue for such calls. * elf64-ppc.c (ppc64_elf_size_stubs): Test for localentry:0 plt calls before tocsave calls. (ppc64_elf_relocate_section): Allow localentry:0 plt calls without following nop.
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@ -1,3 +1,10 @@
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2017-06-21 Alan Modra <amodra@gmail.com>
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* elf64-ppc.c (ppc64_elf_size_stubs): Test for localentry:0 plt
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calls before tocsave calls.
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(ppc64_elf_relocate_section): Allow localentry:0 plt calls without
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following nop.
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2017-06-21 Nick Clifton <nickc@redhat.com>
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PR binutils/21645
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@ -12634,18 +12634,19 @@ ppc64_elf_size_stubs (struct bfd_link_info *info)
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if (stub_type == ppc_stub_plt_call)
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{
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if (irela + 1 < irelaend
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&& irela[1].r_offset == irela->r_offset + 4
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&& ELF64_R_TYPE (irela[1].r_info) == R_PPC64_TOCSAVE)
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if (!htab->opd_abi
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&& htab->params->plt_localentry0 != 0
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&& is_elfv2_localentry0 (&hash->elf))
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htab->has_plt_localentry0 = 1;
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else if (irela + 1 < irelaend
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&& irela[1].r_offset == irela->r_offset + 4
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&& (ELF64_R_TYPE (irela[1].r_info)
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== R_PPC64_TOCSAVE))
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{
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if (!tocsave_find (htab, INSERT,
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&local_syms, irela + 1, input_bfd))
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goto error_ret_free_internal;
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}
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else if (!htab->opd_abi
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&& htab->params->plt_localentry0 != 0
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&& is_elfv2_localentry0 (&hash->elf))
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htab->has_plt_localentry0 = 1;
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else
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stub_type = ppc_stub_plt_call_r2save;
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}
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@ -14212,10 +14213,19 @@ ppc64_elf_relocate_section (bfd *output_bfd,
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{
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bfd_boolean can_plt_call = FALSE;
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if (stub_entry->stub_type == ppc_stub_plt_call
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&& !htab->opd_abi
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&& htab->params->plt_localentry0 != 0
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&& is_elfv2_localentry0 (&h->elf))
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{
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/* The function doesn't use or change r2. */
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can_plt_call = TRUE;
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}
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/* All of these stubs may modify r2, so there must be a
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branch and link followed by a nop. The nop is
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replaced by an insn to restore r2. */
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if (rel->r_offset + 8 <= input_section->size)
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else if (rel->r_offset + 8 <= input_section->size)
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{
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unsigned long br;
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@ -14237,13 +14247,6 @@ ppc64_elf_relocate_section (bfd *output_bfd,
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{
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/* Special stub used, leave nop alone. */
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}
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else if (stub_entry->stub_type == ppc_stub_plt_call
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&& !htab->opd_abi
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&& htab->params->plt_localentry0 != 0
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&& is_elfv2_localentry0 (&h->elf))
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{
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/* The function doesn't use or change r2. */
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}
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else
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bfd_put_32 (input_bfd,
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LD_R2_0R1 + STK_TOC (htab),
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