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Fix linking mixed SHF_LINK_ORDER and non-SHF_LINK_ORDER sections. (#1907945)

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This commit is contained in:
Nick Clifton 2021-01-04 14:24:14 +00:00
parent 1c6ed47920
commit 4b3b7c0eda
3 changed files with 261 additions and 42 deletions
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223
binutils-SHF_LINK_ORDER.patch Normal file
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@ -0,0 +1,223 @@
diff -rup binutils.orig/bfd/bfd-in2.h binutils-2.35.1/bfd/bfd-in2.h
--- binutils.orig/bfd/bfd-in2.h 2021-01-04 13:18:10.234368481 +0000
+++ binutils-2.35.1/bfd/bfd-in2.h 2021-01-04 13:18:20.596301287 +0000
@@ -1177,6 +1177,9 @@ typedef struct bfd_section
struct bfd_symbol *symbol;
struct bfd_symbol **symbol_ptr_ptr;
+ /* The matching section name pattern in linker script. */
+ const char *pattern;
+
/* Early in the link process, map_head and map_tail are used to build
a list of input sections attached to an output section. Later,
output sections use these fields for a list of bfd_link_order
@@ -1370,8 +1373,8 @@ discarded_section (const asection *sec)
/* target_index, used_by_bfd, constructor_chain, owner, */ \
0, NULL, NULL, NULL, \
\
- /* symbol, symbol_ptr_ptr, */ \
- (struct bfd_symbol *) SYM, &SEC.symbol, \
+ /* symbol, symbol_ptr_ptr, pattern, */ \
+ (struct bfd_symbol *) SYM, &SEC.symbol, NULL, \
\
/* map_head, map_tail, already_assigned */ \
{ NULL }, { NULL }, NULL \
diff -rup binutils.orig/bfd/elflink.c binutils-2.35.1/bfd/elflink.c
--- binutils.orig/bfd/elflink.c 2021-01-04 13:18:10.223368552 +0000
+++ binutils-2.35.1/bfd/elflink.c 2021-01-04 13:18:20.599301268 +0000
@@ -11662,8 +11662,21 @@ compare_link_order (const void *a, const
const struct bfd_link_order *blo = *(const struct bfd_link_order **) b;
asection *asec = elf_linked_to_section (alo->u.indirect.section);
asection *bsec = elf_linked_to_section (blo->u.indirect.section);
- bfd_vma apos = asec->output_section->lma + asec->output_offset;
- bfd_vma bpos = bsec->output_section->lma + bsec->output_offset;
+ bfd_vma apos, bpos;
+
+ /* Check if any sections are unordered. */
+ if (asec == NULL || bsec == NULL)
+ {
+ /* Place ordered sections before unordered sections. */
+ if (bsec != NULL)
+ return 1;
+ else if (asec != NULL)
+ return -1;
+ return 0;
+ }
+
+ apos = asec->output_section->lma + asec->output_offset;
+ bpos = bsec->output_section->lma + bsec->output_offset;
if (apos < bpos)
return -1;
@@ -11698,14 +11711,14 @@ compare_link_order (const void *a, const
sections. Ideally we'd do this in the linker proper. */
static bfd_boolean
-elf_fixup_link_order (bfd *abfd, asection *o)
+elf_fixup_link_order (struct bfd_link_info *info, bfd *abfd, asection *o)
{
size_t seen_linkorder;
size_t seen_other;
size_t n;
struct bfd_link_order *p;
bfd *sub;
- struct bfd_link_order **sections;
+ struct bfd_link_order **sections, **indirect_sections;
asection *other_sec, *linkorder_sec;
bfd_vma offset; /* Octets. */
@@ -11736,7 +11749,9 @@ elf_fixup_link_order (bfd *abfd, asectio
else
seen_other++;
- if (seen_other && seen_linkorder)
+ /* Allow mixed ordered and unordered input sections for
+ non-relocatable link. */
+ if (bfd_link_relocatable (info) && seen_other && seen_linkorder)
{
if (other_sec && linkorder_sec)
_bfd_error_handler
@@ -11756,6 +11771,10 @@ elf_fixup_link_order (bfd *abfd, asectio
if (!seen_linkorder)
return TRUE;
+ /* Non-relocatable output can have both ordered and unordered input
+ sections. */
+ seen_linkorder += seen_other;
+
sections = bfd_malloc (seen_linkorder * sizeof (*sections));
if (sections == NULL)
return FALSE;
@@ -11764,22 +11783,51 @@ elf_fixup_link_order (bfd *abfd, asectio
for (p = o->map_head.link_order; p != NULL; p = p->next)
sections[seen_linkorder++] = p;
- /* Sort the input sections in the order of their linked section. */
- qsort (sections, seen_linkorder, sizeof (*sections), compare_link_order);
+ for (indirect_sections = sections, n = 0; n < seen_linkorder;)
+ {
+ /* Find the first bfd_indirect_link_order section. */
+ if (indirect_sections[0]->type == bfd_indirect_link_order)
+ {
+ /* Count the consecutive bfd_indirect_link_order sections
+ with the same pattern. */
+ size_t i, n_indirect;
+ const char *pattern
+ = indirect_sections[0]->u.indirect.section->pattern;
+ for (i = n + 1; i < seen_linkorder; i++)
+ if (sections[i]->type != bfd_indirect_link_order
+ || sections[i]->u.indirect.section->pattern != pattern)
+ break;
+ n_indirect = i - n;
+ /* Sort the bfd_indirect_link_order sections in the order of
+ their linked section. */
+ qsort (indirect_sections, n_indirect, sizeof (*sections),
+ compare_link_order);
+ indirect_sections += n_indirect;
+ n += n_indirect;
+ }
+ else
+ {
+ indirect_sections++;
+ n++;
+ }
+ }
- /* Change the offsets of the sections. */
+ /* Change the offsets of the bfd_indirect_link_order sections. */
offset = 0;
for (n = 0; n < seen_linkorder; n++)
- {
- bfd_vma mask;
- asection *s = sections[n]->u.indirect.section;
- unsigned int opb = bfd_octets_per_byte (abfd, s);
-
- mask = ~(bfd_vma) 0 << s->alignment_power * opb;
- offset = (offset + ~mask) & mask;
- sections[n]->offset = s->output_offset = offset / opb;
- offset += sections[n]->size;
- }
+ if (sections[n]->type == bfd_indirect_link_order)
+ {
+ bfd_vma mask;
+ asection *s = sections[n]->u.indirect.section;
+ unsigned int opb = bfd_octets_per_byte (abfd, s);
+
+ mask = ~(bfd_vma) 0 << s->alignment_power * opb;
+ offset = (offset + ~mask) & mask;
+ sections[n]->offset = s->output_offset = offset / opb;
+ offset += sections[n]->size;
+ }
+ else
+ offset = sections[n]->offset + sections[n]->size;
free (sections);
return TRUE;
@@ -12408,7 +12456,7 @@ bfd_elf_final_link (bfd *abfd, struct bf
/* Reorder SHF_LINK_ORDER sections. */
for (o = abfd->sections; o != NULL; o = o->next)
{
- if (!elf_fixup_link_order (abfd, o))
+ if (!elf_fixup_link_order (info, abfd, o))
return FALSE;
}
diff -rup binutils.orig/bfd/section.c binutils-2.35.1/bfd/section.c
--- binutils.orig/bfd/section.c 2021-01-04 13:18:10.233368487 +0000
+++ binutils-2.35.1/bfd/section.c 2021-01-04 13:18:20.599301268 +0000
@@ -541,6 +541,9 @@ CODE_FRAGMENT
. struct bfd_symbol *symbol;
. struct bfd_symbol **symbol_ptr_ptr;
.
+. {* The matching section name pattern in linker script. *}
+. const char *pattern;
+.
. {* Early in the link process, map_head and map_tail are used to build
. a list of input sections attached to an output section. Later,
. output sections use these fields for a list of bfd_link_order
@@ -734,8 +737,8 @@ CODE_FRAGMENT
. {* target_index, used_by_bfd, constructor_chain, owner, *} \
. 0, NULL, NULL, NULL, \
. \
-. {* symbol, symbol_ptr_ptr, *} \
-. (struct bfd_symbol *) SYM, &SEC.symbol, \
+. {* symbol, symbol_ptr_ptr, pattern, *} \
+. (struct bfd_symbol *) SYM, &SEC.symbol, NULL, \
. \
. {* map_head, map_tail, already_assigned *} \
. { NULL }, { NULL }, NULL \
diff -rup binutils.orig/gas/config/obj-elf.c binutils-2.35.1/gas/config/obj-elf.c
--- binutils.orig/gas/config/obj-elf.c 2021-01-04 13:18:09.942370375 +0000
+++ binutils-2.35.1/gas/config/obj-elf.c 2021-01-04 13:18:20.599301268 +0000
@@ -659,7 +659,9 @@ obj_elf_change_section (const char *name
}
}
- if (old_sec == NULL && ((attr & ~(SHF_MASKOS | SHF_MASKPROC))
+ if (old_sec == NULL && ((attr & ~(SHF_LINK_ORDER
+ | SHF_MASKOS
+ | SHF_MASKPROC))
& ~ssect->attr) != 0)
{
/* As a GNU extension, we permit a .note section to be
diff -rup binutils.orig/ld/ldlang.c binutils-2.35.1/ld/ldlang.c
--- binutils.orig/ld/ldlang.c 2021-01-04 13:18:09.691372002 +0000
+++ binutils-2.35.1/ld/ldlang.c 2021-01-04 13:18:20.600301261 +0000
@@ -7421,7 +7421,7 @@ lang_reset_memory_regions (void)
static void
gc_section_callback (lang_wild_statement_type *ptr,
- struct wildcard_list *sec ATTRIBUTE_UNUSED,
+ struct wildcard_list *sec,
asection *section,
struct flag_info *sflag_info ATTRIBUTE_UNUSED,
lang_input_statement_type *file ATTRIBUTE_UNUSED,
@@ -7431,6 +7431,8 @@ gc_section_callback (lang_wild_statement
should be as well. */
if (ptr->keep_sections)
section->flags |= SEC_KEEP;
+ if (sec)
+ section->pattern = sec->spec.name;
}
/* Iterate over sections marking them against GC. */

17
binutils.spec
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@ -39,7 +39,7 @@
Summary: A GNU collection of binary utilities
Name: binutils%{?name_cross}%{?_with_debug:-debug}
Version: 2.35.1
Release: 16%{?dist}
Release: 17%{?dist}
License: GPLv3+
URL: https://sourceware.org/binutils
@ -48,6 +48,8 @@ URL: https://sourceware.org/binutils
# Binutils SPEC file. Can be invoked with the following parameters to change
# the default behaviour:
# --define "binutils_target arm-linux-gnu" to create arm-linux-gnu-binutils.
#
# --with bootstrap Build with minimal dependencies.
# --with debug Build without optimizations and without splitting
# the debuginfo into a separate file.
@ -138,14 +140,13 @@ URL: https://sourceware.org/binutils
# too many controversial patches so we stick with the official FSF version
# instead.
Source: https://ftp.gnu.org/gnu/binutils/binutils-%%{version}.tar.xz
Source: https://ftp.gnu.org/gnu/binutils/binutils-%{version}.tar.xz
Source2: binutils-2.19.50.0.1-output-format.sed
#----------------------------------------------------------------------------
Patch00: binutils-2.35.1-update.patch
# Purpose: Use /lib64 and /usr/lib64 instead of /lib and /usr/lib in the
# default library search path of 64-bit targets.
# Lifetime: Permanent, but it should not be. This is a bug in the libtool
@ -286,12 +287,9 @@ Patch26: binutils-plugin-as-needed.patch
# Lifetime: Fixed in 2.36
Patch27: binutils-recursive-debuglink-following.patch
# Purpose: Fix the DWARF parser to skip DW_FORM_ref_addr types
# when attempting to determine a type's signedness.
# Purpose: Correctly handle mixed SHF_LINK_ORDER and non-SHF_LINK_ORDER sections.
# Lifetime: Fixed in 2.36
# Patch28: binutils-dwarf-type-sign.patch
# Patch29: binutils-dwarf-type-sign-2.patch
# Patch30: binutils-dwarf-DW_FORM_ref8.patch
Patch28: binutils-SHF_LINK_ORDER.patch
#----------------------------------------------------------------------------
@ -872,6 +870,9 @@ exit 0
#----------------------------------------------------------------------------
%changelog
* Mon Jan 04 2021 Nick Clifton <nickc@redhat.com> - 2.35.1-17
- Fix linking mixed SHF_LINK_ORDER and non-SHF_LINK_ORDER sections. (#1907945)
* Thu Nov 26 2020 Florian Weimer <fweimer@redhat.com> - 2.35.1-16
- NVR bump for toolchain rebuild

63
spec.binutils.cross
View File

@ -2,70 +2,65 @@
# Note - this is an rpm spec file, but it has been renamed in order to avoid
# conflict with the real binutils.spec file.
#
# Its only use is to build a set of cross-binutils rpms by installing it
# into an rpmbuild tree where the binutils source rpm has already been placed.
# It should be run as:
# Its only use is to build a set of cross-binutils rpms by putting it into
# the SPECS directory of an rpmbuild tree, installing the binutils source
# rpm into the SOURCES directory and then running:
#
# rpmbuild -bb spec.binutils.cross
Summary: A meta collection of GNU binutils executables for cross builds
Name: cross-binutils
# Note: KEEP THE Version and Release fields IN SYNC with binutils.spec
Version: 2.35.1
Release: 14%{?dist}
License: GPLv3+
URL: https://sourceware.org/binutils
Source: binutils.spec
#----------------------------------------------------------------------------
#
# Configurable settings - adjust to match your needs:
#
Version: 2.30
Release: 89.el8
# The list of cross architectures to build.
# Note: this list assumes that we are building on an x86_64-linux-gnu host.
%define arch_list aarch64-linux-gnu ppc64le-linux-gnu s390x-linux-gnu
#----------------------------------------------------------------------------
%define binutils_source_rpm binutils-%{version}-%{release}.src.rpm
Source: %{binutils_source_rpm}
# Provides: bundled(libiberty)
BuildRequires: autoconf automake
BuildRequires: perl, sed, coreutils
BuildRequires: gcc
BuildRequires: gcc, bison
BuildRequires: gettext, flex, zlib-devel
BuildRequires: findutils
BuildRequires: findutils, texinfo
BuildRequires: dejagnu, zlib-static, glibc-static, sharutils, bc
BuildRequires: elfutils-debuginfod-client-devel
# BuildRequires: elfutils-debuginfod-client-devel
BuildRequires: rpm-build
Requires(post): %{_sbindir}/alternatives
Requires(post): coreutils
Requires(preun): %{_sbindir}/alternatives
#----------------------------------------------------------------------------
%description
Provides a collection of cross built binutils for the targets
supported by RHEL (aarch64, i686, ppc64le, s390x).
# Note - this list assumes that we are building on an x86_64-linux-gnu host.
%define arch_list aarch64-linux-gnu i686-linux-gnu ppc64le-linux-gnu s390x-linux-gnu
#----------------------------------------------------------------------------
%prep
supported by RHEL (aarch64, ppc64le, s390x).
#----------------------------------------------------------------------------
%build
# Install the binutils sources.
rpm -ivh %{_sourcedir}/%{binutils_source_rpm}
# Build each set of cross binutils individually.
for f in %{arch_list}; do
rpmbuild -bb --define "binutils_target $f" %{_specdir}/binutils.spec --without testsuite
rpmbuild -bb --define "binutils_target $f" %{_specdir}/binutils.spec --without testsuite --without gold
done
#----------------------------------------------------------------------------
%install
#----------------------------------------------------------------------------
%files
#----------------------------------------------------------------------------
%changelog
* Wed Nov 11 2020 Nick Clifton <nickc@redhat.com> - 2.35.1-14