94 lines
3.0 KiB
Diff
94 lines
3.0 KiB
Diff
From d66deb71f1537e2e30dccdfda22eed5d46ec47eb Mon Sep 17 00:00:00 2001
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From: Alan Modra <amodra@gmail.com>
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Date: Wed, 14 Mar 2018 22:09:33 +1030
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Subject: [PATCH] PowerPC64 debian bug 886264, out-of-line save/restore
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functions
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This calculation in relocate_section
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if (stub_entry->stub_type == ppc_stub_save_res)
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relocation += (stub_sec->output_offset
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+ stub_sec->output_section->vma
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+ stub_sec->size - htab->sfpr->size
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- htab->sfpr->output_offset
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- htab->sfpr->output_section->vma);
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to adjust from the original out-of-line save/restore function address
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in sfpr to a copy at the end of stub_sec goes wrong when stub_sec is
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padded, because the copy is no longer at the end of stub_sec. The
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solution is to pad before copying sfpr, so the copy is always at the
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end of stub_sec.
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* elf64-ppc.c (sfpr_define): Adjust for stub_sec size having
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sfpr size added before defining alias symbols.
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(ppc64_elf_build_stubs): Add stub section padding before
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copying sfpr contents and defining save/restore alias symbols.
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(cherry picked from commit 7dda8d3cf3b089bb7e03c4cdbec827fc6a188c88)
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---
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bfd/ChangeLog | 9 +++++++++
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bfd/elf64-ppc.c | 33 ++++++++++++++++++---------------
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2 files changed, 27 insertions(+), 15 deletions(-)
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diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
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index 6fcdff0..039294f 100644
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--- a/bfd/elf64-ppc.c
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+++ b/bfd/elf64-ppc.c
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@@ -6645,7 +6645,7 @@ sfpr_define (struct bfd_link_info *info,
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{
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s->root.type = bfd_link_hash_defined;
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s->root.u.def.section = stub_sec;
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- s->root.u.def.value = (stub_sec->size
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+ s->root.u.def.value = (stub_sec->size - htab->sfpr->size
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+ h->elf.root.u.def.value);
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s->ref_regular = 1;
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s->def_regular = 1;
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@@ -13232,20 +13232,7 @@ ppc64_elf_build_stubs (struct bfd_link_info *info,
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for (group = htab->group; group != NULL; group = group->next)
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if (group->needs_save_res)
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- {
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- stub_sec = group->stub_sec;
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- memcpy (stub_sec->contents + stub_sec->size, htab->sfpr->contents,
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- htab->sfpr->size);
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- if (htab->params->emit_stub_syms)
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- {
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- unsigned int i;
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-
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- for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
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- if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
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- return FALSE;
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- }
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- stub_sec->size += htab->sfpr->size;
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- }
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+ group->stub_sec->size += htab->sfpr->size;
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if (htab->relbrlt != NULL)
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htab->relbrlt->reloc_count = 0;
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@@ -13259,6 +13246,22 @@ ppc64_elf_build_stubs (struct bfd_link_info *info,
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}
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for (group = htab->group; group != NULL; group = group->next)
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+ if (group->needs_save_res)
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+ {
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+ stub_sec = group->stub_sec;
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+ memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size,
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+ htab->sfpr->contents, htab->sfpr->size);
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+ if (htab->params->emit_stub_syms)
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+ {
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+ unsigned int i;
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+
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+ for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++)
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+ if (!sfpr_define (info, &save_res_funcs[i], stub_sec))
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+ return FALSE;
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+ }
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+ }
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+
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+ for (group = htab->group; group != NULL; group = group->next)
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if ((stub_sec = group->stub_sec) != NULL)
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{
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stub_sec_count += 1;
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--
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2.9.3
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