118 lines
4.8 KiB
Diff
118 lines
4.8 KiB
Diff
--- binutils.orig/ld/emultempl/elf32.em 2017-09-14 15:35:45.971100712 +0100
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+++ binutils-2.29/ld/emultempl/elf32.em 2017-09-14 15:40:30.315782167 +0100
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@@ -2011,6 +2011,29 @@ output_rel_find (asection *sec, int isdy
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static int orphan_init_done = 0;
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+/* Return whether IN is suitable to be part of OUT. */
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+
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+static bfd_boolean
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+elf_orphan_compatible (asection *in, asection *out)
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+{
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+ /* Non-zero sh_info implies a section with SHF_INFO_LINK with
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+ unknown semantics for the generic linker, or a SHT_REL/SHT_RELA
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+ section where sh_info specifies a symbol table. (We won't see
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+ SHT_GROUP, SHT_SYMTAB or SHT_DYNSYM sections here.) We clearly
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+ can't merge SHT_REL/SHT_RELA using differing symbol tables, and
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+ shouldn't merge sections with differing unknown semantics. */
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+ if (elf_section_data (out)->this_hdr.sh_info
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+ != elf_section_data (in)->this_hdr.sh_info)
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+ return FALSE;
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+ /* We can't merge two sections with differing SHF_EXCLUDE when doing
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+ a relocatable link. */
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+ if (bfd_link_relocatable (&link_info)
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+ && ((elf_section_flags (out) ^ elf_section_flags (in)) & SHF_EXCLUDE) != 0)
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+ return FALSE;
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+ return _bfd_elf_match_sections_by_type (link_info.output_bfd, out,
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+ in->owner, in);
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+}
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+
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/* Place an orphan section. We use this to put random SHF_ALLOC
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sections in the right segment. */
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@@ -2067,8 +2090,9 @@ gld${EMULATION_NAME}_place_orphan (asect
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lang_output_section_statement_type *os;
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lang_output_section_statement_type *match_by_name = NULL;
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int isdyn = 0;
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- int iself = s->owner->xvec->flavour == bfd_target_elf_flavour;
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- unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL;
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+ int elfinput = s->owner->xvec->flavour == bfd_target_elf_flavour;
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+ int elfoutput = link_info.output_bfd->xvec->flavour == bfd_target_elf_flavour;
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+ unsigned int sh_type = elfinput ? elf_section_type (s) : SHT_NULL;
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flagword flags;
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asection *nexts;
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@@ -2076,7 +2100,7 @@ gld${EMULATION_NAME}_place_orphan (asect
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&& link_info.combreloc
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&& (s->flags & SEC_ALLOC))
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{
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- if (iself)
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+ if (elfinput)
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switch (sh_type)
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{
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case SHT_RELA:
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@@ -2098,6 +2122,8 @@ gld${EMULATION_NAME}_place_orphan (asect
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}
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if (!bfd_link_relocatable (&link_info)
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+ && elfinput
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+ && elfoutput
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&& (s->flags & SEC_ALLOC) != 0
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&& (elf_section_flags (s) & SHF_GNU_MBIND) != 0)
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{
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@@ -2148,23 +2174,18 @@ gld${EMULATION_NAME}_place_orphan (asect
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lang_insert_orphan to create a new output section. */
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constraint = SPECIAL;
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- /* SEC_EXCLUDE is cleared when doing a relocatable link. But
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- we can't merge 2 input sections with the same name when only
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- one of them has SHF_EXCLUDE. Don't merge 2 sections with
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- different sh_info. */
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+ /* Check to see if we already have an output section statement
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+ with this name, and its bfd section has compatible flags.
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+ If the section already exists but does not have any flags
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+ set, then it has been created by the linker, possibly as a
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+ result of a --section-start command line switch. */
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if (os->bfd_section != NULL
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- && (elf_section_data (os->bfd_section)->this_hdr.sh_info
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- == elf_section_data (s)->this_hdr.sh_info)
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&& (os->bfd_section->flags == 0
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- || ((!bfd_link_relocatable (&link_info)
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- || (iself && (((elf_section_flags (s)
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- ^ elf_section_flags (os->bfd_section))
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- & SHF_EXCLUDE) == 0)))
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- && ((s->flags ^ os->bfd_section->flags)
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+ || (((s->flags ^ os->bfd_section->flags)
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& (SEC_LOAD | SEC_ALLOC)) == 0
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- && _bfd_elf_match_sections_by_type (link_info.output_bfd,
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- os->bfd_section,
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- s->owner, s))))
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+ && (!elfinput
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+ || !elfoutput
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+ || elf_orphan_compatible (s, os->bfd_section)))))
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{
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/* We already have an output section statement with this
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name, and its bfd section has compatible flags.
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@@ -2253,8 +2274,8 @@ gld${EMULATION_NAME}_place_orphan (asect
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else if ((flags & SEC_ALLOC) == 0)
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;
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else if ((flags & SEC_LOAD) != 0
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- && ((iself && sh_type == SHT_NOTE)
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- || (!iself && CONST_STRNEQ (secname, ".note"))))
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+ && ((elfinput && sh_type == SHT_NOTE)
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+ || (!elfinput && CONST_STRNEQ (secname, ".note"))))
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place = &hold[orphan_interp];
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else if ((flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0)
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place = &hold[orphan_bss];
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@@ -2264,8 +2285,8 @@ gld${EMULATION_NAME}_place_orphan (asect
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place = &hold[orphan_tdata];
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else if ((flags & SEC_READONLY) == 0)
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place = &hold[orphan_data];
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- else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL))
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- || (!iself && CONST_STRNEQ (secname, ".rel")))
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+ else if (((elfinput && (sh_type == SHT_RELA || sh_type == SHT_REL))
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+ || (!elfinput && CONST_STRNEQ (secname, ".rel")))
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&& (flags & SEC_LOAD) != 0)
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place = &hold[orphan_rel];
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else if ((flags & SEC_CODE) == 0)
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