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This allows you to specify a run_dump_test warning that may or may not
be present using
warning: (warning_text_goes_here)?
ie. the regexp matches an empty string.
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ChangeLog
2025-01-16 Vladimir Mezentsev <vladimir.mezentsev@oracle.com>
* binutils/NEWS: Updated.
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* objdump.c (main): Free disassembler_options.
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There's always someone pushing the boundaries.
PR 32560
* objdump.c (MAX_INSN_WIDTH): Define.
(insn_width): Make it an unsigned long.
(disassemble_bytes): Use MAX_INSN_WIDTH to size buffer.
(main <OPTION_INSN_WIDTH>): Restrict size of insn_width.
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Add --enable-memory-seal linker configure option to enable memory
sealing (GNU_PROPERTY_MEMORY_SEAL) by default.
Change-Id: I4ce4ff33657f0f09b1ceb06210b6fcaa501f1799
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The GNU_PROPERTY_MEMORY_SEAL gnu property is a way to mark binaries
to be memory sealed by the loader, to avoid further changes of
PT_LOAD segments (such as unmapping or change permission flags).
This is done along with Linux kernel (the mseal syscall [1]), and
C runtime supports to instruct the kernel on the correct time during
program startup (for instance, after RELRO handling). This support
is added along the glibc support to handle the new gnu property [2].
This is a opt-in security features, like other security hardening
ones like NX-stack or RELRO.
The new property is ignored if present on ET_REL objects, and only
added on ET_EXEC/ET_DYN if the linker option is used. A gnu property
is used instead of DT_FLAGS_1 flag to allow memory sealing to work
with ET_EXEC without PT_DYNAMIC support (at least on glibc some ports
still do no support static-pie).
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8be7258aad44b5e25977a98db136f677fa6f4370
[2] https://sourceware.org/pipermail/libc-alpha/2024-September/160291.html
Change-Id: Id47fadabecd24be0e83cff45653f7ce9a900ecf4
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This patch adds a new CFI directive (cfi_negate_ra_state_with_pc) which
set an additional bit in the RA state to inform that RA was signed with
SP but also PC as an additional diversifier.
RA state | Description
0b00 | Return address not signed (default if no cfi_negate_ra_state*)
0b01 | Return address signed with SP (cfi_negate_ra_state)
0b10 | Invalid state
0b11 | Return address signed with SP+PC (cfi_negate_ra_state_with_pc)
Approved-by: Indu Bhagat <indu.bhagat@oracle.com>
Approved-by: Jan Beulich <jbeulich@suse.com>
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Link with mixed IR/non-IR objects
* 2 kinds of object files
o non-IR object file has
* non-IR sections
o IR object file has
* IR sections
* non-IR sections
* The output of "ld -r" with mixed IR/non-IR objects should work with:
o Compilers/linkers with IR support.
o Compilers/linkers without IR support.
* Add the mixed object file which has
o IR sections
o non-IR sections:
* Object codes from IR sections.
* Object codes from non-IR object files.
o Object-only section:
* With section name ".gnu_object_only" and SHT_GNU_OBJECT_ONLY type
on ELF:
https://gitlab.com/x86-psABIs/Linux-ABI
#define SHT_GNU_OBJECT_ONLY 0x6ffffff8 /* Object only */
* Contain non-IR object file.
* Input is discarded after link.
* Linker action:
o Classify each input object file:
* If there is a ".gnu_object_only" section, it is a mixed object file.
* If there is a IR section, it is an IR object file.
* Otherwise, it is a non-IR object file.
o Relocatable non-IR link:
* Prepare for an object-only output.
* Prepare for a regular output.
* For each mixed object file:
* Add IR and non-IR sections to the regular output.
* For object-only section:
* Extract object only file.
* Add it to the object-only output.
* Discard object-only section.
* For each IR object file:
* Add IR and non-IR sections to the regular output.
* For each non-IR object file:
* Add non-IR sections to the regular output.
* Add non-IR sections to the object-only output.
* Final output:
* If there are IR objects, non-IR objects and the object-only
output isn't empty:
* Put the object-only output into the object-only section.
* Add the object-only section to the regular output.
* Remove the object-only output.
o Normal link and relocatable IR link:
* Prepare for output.
* IR link:
* For each mixed object file:
* Compile and add IR sections to the output.
* Discard non-IR sections.
* Object-only section:
* Extract object only file.
* Add it to the output.
* Discard object-only section.
* For each IR object file:
* Compile and add IR sections to the output.
* Discard non-IR sections.
* For each non-IR object file:
* Add non-IR sections to the output.
* Non-IR link:
* For each mixed object file:
* Add non-IR sections to the output.
* Discard IR sections and object-only section.
* For each IR object file:
* Add non-IR sections to the output.
* Discard IR sections.
* For each non-IR object file:
* Add non-IR sections to the output.
This is useful for Linux kernel build with LTO.
bfd/
PR ld/12291
PR ld/12430
PR ld/13298
* bfd.c (bfd_lto_object_type): Add lto_mixed_object.
(bfd): Add object_only_section.
(bfd_group_signature): New.
* elf.c (special_sections_g): Add .gnu_object_only.
* format.c: Include "plugin-api.h" and "plugin.h" if
BFD_SUPPORTS_PLUGINS is defined.
(bfd_set_lto_type): Set type to lto_mixed_object for
GNU_OBJECT_ONLY_SECTION_NAME section.
(bfd_check_format_matches): Don't check the plugin target twice
if the plugin target is explicitly specified.
* opncls.c (bfd_extract_object_only_section): New.
* plugin.c (bfd_plugin_fake_text_section): New.
(bfd_plugin_fake_data_section): Likewise.
(bfd_plugin_fake_bss_section): Likewise.
(bfd_plugin_fake_common_section): Likewise.
(bfd_plugin_get_symbols_in_object_only): Likewise.
* plugin.c (add_symbols): Call
bfd_plugin_get_symbols_in_object_only and count
plugin_data->object_only_nsyms.
(bfd_plugin_get_symtab_upper_bound): Count
plugin_data->object_only_nsyms.
bfd_plugin_get_symbols_in_object_only and add symbols from
object only section.
(bfd_plugin_canonicalize_symtab): Remove fake_section,
fake_data_section, fake_bss_section and fake_common_section.
Set udata.p to NULL. Use bfd_plugin_fake_text_section,
bfd_plugin_fake_data_section, bfd_plugin_fake_bss_section and
bfd_plugin_fake_common_section.
Set udata.p to NULL.
* plugin.h (plugin_data_struct): Add object_only_nsyms and
object_only_syms.
* section.c (GNU_OBJECT_ONLY_SECTION_NAME): New.
* bfd-in2.h: Regenerated.
binutils/
PR ld/12291
PR ld/12430
PR ld/13298
* objcopy.c (group_signature): Removed.
(is_strip_section): Replace group_signature with
bfd_group_signature.
(setup_section): Likewise.
* readelf.c (get_os_specific_section_type_name): Handle
SHT_GNU_OBJECT_ONLY.
gas/
PR ld/12291
PR ld/12430
PR ld/13298
* testsuite/gas/elf/section9.s: Add the .gnu_object_only test.
* testsuite/gas/elf/section9.d: Updated.
include/
PR ld/12291
PR ld/12430
PR ld/13298
* elf/common.h (SHT_GNU_OBJECT_ONLY): New.
ld/
PR ld/12291
PR ld/12430
PR ld/13298
* ld.h (ld_config_type): Add emit_gnu_object_only and
emitting_gnu_object_only.
* ldelf.c (orphan_init_done): Make it file scope.
(ldelf_place_orphan): Rename hold to orig_hold. Initialize hold
from orig_hold at run-time.
(ldelf_finish): New.
* ldelf.h (ldelf_finish): New.
* ldexp.c (ldexp_init): Take a bfd_boolean argument to supprt
object-only output.
(ldexp_finish): Likewise.
* ldexp.h (ldexp_init): Take a bfd_boolean argument.
(ldexp_finish): Likewise.
* ldfile.c (ldfile_try_open_bfd): Call
cmdline_check_object_only_section.
* ldlang.c: Include "ldwrite.h" and elf-bfd.h.
* ldlang.c (cmdline_object_only_file_list): New.
(cmdline_object_only_archive_list): Likewise.
(cmdline_temp_object_only_list): Likewise.
(cmdline_lists_init): Likewise.
(cmdline_list_new): Likewise.
(cmdline_list_append): Likewise.
(print_cmdline_list): Likewise.
(cmdline_on_object_only_archive_list_p): Likewise.
(cmdline_object_only_list_append): Likewise.
(cmdline_get_object_only_input_files): Likewise.
(cmdline_arg): Likewise.
(setup_section): Likewise.
(copy_section): Likewise.
(cmdline_fopen_temp): Likewise.
(cmdline_add_object_only_section): Likewise.
(cmdline_emit_object_only_section): Likewise.
(cmdline_extract_object_only_section): Likewise.
(cmdline_check_object_only_section): Likewise.
(cmdline_remove_object_only_files): Likewise.
(lang_init): Take a bfd_boolean argument to supprt object-only
output. Call cmdline_lists_init.
(load_symbols): Call cmdline_on_object_only_archive_list_p
to check if an archive member should be loaded.
(lang_process): Handle object-only link.
* ldlang.h (lang_init): Take a bfd_boolean argument.
(cmdline_enum_type): New.
(cmdline_header_type): Likewise.
(cmdline_file_type): Likewise.
(cmdline_bfd_type): Likewise.
(cmdline_union_type): Likewise.
(cmdline_list_type): Likewise.
(cmdline_emit_object_only_section): Likewise.
(cmdline_check_object_only_section): Likewise.
(cmdline_remove_object_only_files): Likewise.
* ldmain.c (main): Call xatexit with
cmdline_remove_object_only_files. Pass FALSE to lang_init,
ldexp_init and ldexp_finish. Use ld_parse_linker_script.
Set link_info.output_bfd to NULL after close. Call
cmdline_emit_object_only_section if needed.
(add_archive_element): Call cmdline_check_object_only_section.
(ld_parse_linker_script): New.
* ldmain.h (ld_parse_linker_script): New.
* plugin.c (plugin_maybe_claim): Call
cmdline_check_object_only_section on claimed IR files.
* scripttempl/elf.sc: Also discard .gnu_object_only sections.
* scripttempl/elf64hppa.sc: Likewise.
* scripttempl/elfxtensa.sc: Likewise.
* scripttempl/mep.sc: Likewise.
* scripttempl/pe.sc: Likewise.
* scripttempl/pep.sc: Likewise.
* emultempl/aarch64elf.em (gld${EMULATION_NAME}_finish): Replace
finish_default with ldelf_finish.
* emultempl/alphaelf.em (alpha_finish): Likewise.
* emultempl/avrelf.em (avr_finish): Likewise.
* emultempl/elf.em (ld_${EMULATION_NAME}_emulation): Likewise.
* emultempl/ppc32elf.em (ppc_finish): Likewise.
* emultempl/ppc64elf.em (gld${EMULATION_NAME}_finish): Likewise.
* emultempl/spuelf.em (gld${EMULATION_NAME}_finish): Likewise.
* testsuite/ld-plugin/lto-10.out: New file.
* testsuite/ld-plugin/lto-10a.c: Likewise.
* testsuite/ld-plugin/lto-10b.c: Likewise.
* testsuite/ld-plugin/lto-10r.d: Likewise.
* testsuite/ld-plugin/lto-4.out: Likewise.
* testsuite/ld-plugin/lto-4a.c: Likewise.
* testsuite/ld-plugin/lto-4b.c: Likewise.
* testsuite/ld-plugin/lto-4c.c: Likewise.
* testsuite/ld-plugin/lto-4r-a.d: Likewise.
* testsuite/ld-plugin/lto-4r-b.d: Likewise.
* testsuite/ld-plugin/lto-4r-c.d: Likewise.
* testsuite/ld-plugin/lto-4r-d.d: Likewise.
* testsuite/ld-plugin/lto.exp (lto_link_tests): Prepare for
"LTO 4[acd]", "lto-4r-[abcd]" and "LTO 10" tests.
(lto_run_tests): Add "LTO 4[acd]" and "LTO 10" tests.
Build liblto-4.a. Run "lto-4r-[abcd]" tests.
Run lto-10r and create tmpdir/lto-10.o.
Add test for nm on mixed LTO/non-LTO object.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
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ar is supposed to make archives containing any sort of file, and it
generally does that. It also tries to make archives suited to target
object files stored. Some targets have peculiar archives.
In one particular case we get into trouble trying to suit archives to
object files: where the target object file is recognised but that
target doesn't happen to support archives, and the default target has
a special archive format. For example, we'll get failures on
rs6000-aix if trying to add tekhex objects to a new archive. What
happens in that the tekhex object is recognised and its target vector
used to create an empty archive, ie. with _bfd_generic_mkarchive and
_bfd_write_archive_contents. An attempt is then made to open the
newly created archive. The tekhex target vector does not have a
check_format function to recognise generic archives, nor as it happens
do any of the xcoff or other targets built for rs6000-aix.
It seems to me the simplest fix is to not use any target vector to
create archives where that vector can't also recognise them. That's
what this patch does, and to reinforce that I've removed target vector
support for creating empty archives from such targets.
bfd/
* i386msdos.c (i386_msdos_vec): Remove support for creating
empty archives.
* ihex.c (ihex_vec): Likewise.
* srec.c (srec_vec, symbolsrec_vec): Likewise.
* tekhex.c (tekhex_vec): Likewise.
* wasm-module.c (wasm_vec): Likewise.
* ptrace-core.c (core_ptrace_vec): Tidy.
* targets.c (bfd_target_supports_archives): New inline function.
* bfd-in2.h: Regenerate.
binutils/
* ar.c (open_inarch): Don't select a target from the first
object file that can't read archives. Set output_filename
earlier.
* testsuite/binutils-all/ar.exp (thin_archive_with_nested):
Don't repeat --thin test using T.
(foreign_object): New test.
* testsuite/binutils-all/tek1.obj,
* testsuite/binutils-all/tek2.obj: New files.
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This fixes multiple readelf memory leaks:
- The check functions used to validate separate debug info files
opened and read file data but didn't release the memory nor close
the file.
- A string table was being re-read into a buffer, leaking the old
contents.
- Decompressed section contents leaked.
* dwarf.c (check_gnu_debuglink): Always call close_debug_file.
(check_gnu_debugaltlink): Likewise.
* readelf.c (process_section_headers): Don't read string_table
again if we already have it.
(maybe_expand_or_relocate_section): Add decomp_buf param to
return new uncompressed buffer.
(dump_section_as_strings, filedata->string_table): Free any
uncompressed buffer.
(process_file): Call close_debug_file rather than freeing
various filedata components.
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The sym array should be freed even with a symcount of zero.
* objdump.c (dump_bfd): Free syms before replacing with
extra_syms. Free extra_syms after adding to syms.
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When cleaning up an archive, close all its elements. This fixes a
number of ar memory leaks.
bfd/
* archive.c (_bfd_archive_close_and_cleanup): Close elements
of an archive open for writing.
binutils/
* objcopy.c (copy_archive): Don't close output archive
elements here.
* dlltool.c (gen_lib_file): Likewise.
ld/
* pe-dll.c (pe_dll_generate_implib): Don't close output
archive elements here.
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Cure the leak by always mallocing the string in output_filename,
and freeing the old one any time we assign output_filename.
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Add a check that next_archived_file doesn't return the same element.
Seen with the following, which I think shows a bug with "ar r" and
thin archives as you get two copies of artest.a in artest2.a.
$ rm tmpdir/artest*
$ ./ar rc tmpdir/artest.a tmpdir/bintest.o
$ ./ar rcT tmpdir/artest2.a tmpdir/artest.a
$ ./bfdtest1 tmpdir/artest.a
$ ./bfdtest1 tmpdir/artest2.a
$ ./ar rcT tmpdir/artest2.a tmpdir/artest.a
$ ./bfdtest1 tmpdir/artest2.a
oops: next_archived_file
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version info.
PR 32467
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Describe all the new post DWARF5 language codes from the latest sync
of include/dwarf.h with gcc.
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This field is always set to point to asection.symbol, and no code ever
changes it from its initial value. With one exception. elfxx-mips.c
creates two sections with separate pointers to their symbols, and uses
those as asection.symbol_ptr_ptr. Those pointers aren't modified,
so they disappear in this patch too.
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In commit cd6581da62c3, Nick made an optimisation that was reasonable
at the time, but then pr22032 came along and commit 7c0ed39626e3 made
bfd_close_all_done free memory. So Nick's optimisation is now
ineffective, and the comment wrong.
* objdump.c (display_file): Delete last_file param. Update
caller. Call bfd_close always.
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This also reduces peak memory a little.
* dlltool.c (identify_search_archive): Close last_arfile earlier.
Report an error if bfd_openr_next_archived_file returns the same
bfd. Localise variables.
* nm.c (display_archive): Likewise.
* objdump.c (display_any_bfd): Likewise.
* size.c (display_archive): Likewise.
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free_lineno_cache frees symbol and relocation data used when displaying
line number info for symbols (nm -l). Currently that is done when
closing the bfd, but that's not ideal for archives since that results
in two bfds worth of memory in use.
* nm.c (display_rel_file): Call free_lineno_cache here..
(display_archive, display_file): ..not here.
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.cfi directives only support the use of register numbers and not
register names or aliases.
This commit adds support for 4 formats, for example:
.cfi_offset r1, 8
.cfi_offset ra, 8
.cfi_offset $r1,8
.cfi_offset $ra,8
The above .cfi directives are equivalent and all represent dwarf
register number 1.
Display register aliases as specified in the psABI during disassembly.
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This patch adds support for Guarded Control Stack in AArch64 linker.
This patch implements the following:
1) Defines GNU_PROPERTY_AARCH64_FEATURE_1_GCS bit for GCS in
GNU_PROPERTY_AARCH64_FEATURE_1_AND macro.
2) Adds readelf support to read and print the GCS feature in GNU
properties in AArch64.
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS
3) Adds support for the "-z gcs" linker option and document all the values
allowed with this option (-z gcs[=always|never|implicit]) where "-z gcs" is
equivalent to "-z gcs=always". When '-z gcs' option is omitted from the
command line, it defaults to "implicit" and relies on the GCS feature
marking in GNU properties.
4) Adds support for the "-z gcs-report" linker option and document all the
values allowed with this option (-z gcs-report[=none|warning|error]) where
"-z gcs-report" is equivalent to "-z gcs-report=warning". When this option
is omitted from the command line, it defaults to "warning".
The ABI changes adding GNU_PROPERTY_AARCH64_FEATURE_1_GCS to the GNU
property GNU_PROPERTY_AARCH64_FEATURE_1_AND is merged into main and
can be found in [1].
[1] https://github.com/ARM-software/abi-aa/blob/main/sysvabi64/sysvabi64.rst
Co-authored-by: Matthieu Longo <matthieu.longo@arm.com>
Co-authored-by: Yury Khrustalev <yury.khrustalev@arm.com>
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Remove another adjustment for section address, this time for the
offset into .debug_str{,.dwo} read from .debug_str_offsets{,.dwo} by
fetch_indexed_string.
Signed-off-by: oltolm <oleg.tolmatcev@gmail.com>
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The Nios II architecture has been EOL'ed by the vendor. This patch
removes all binutils, bfd, gas, binutils, and opcodes support for this
target with the exception of the readelf utility. (The ELF EM_*
number remains valid and the relocation definitions from the Nios II
ABI will never change in future, so retaining the readelf support
seems consistent with its purpose as a utility that tries to parse the
headers in any ELF file provided as an argument regardless of target.)
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This won't have any useful effect, so is at best marginally less bogus
than a negative value.
The change actually points out a flawed (for Arm) testcase: @ is a
comment character there.
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GCC trunk now defaults to -std=gnu23. We return false in a few places
which can't work when true/false are a proper type (_Bool). Return NULL
where appropriate instead of false. All callers handle this appropriately.
ChangeLog:
PR ld/32372
* prdbg.c (visibility_name): Return NULL.
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Since QEMU have supported -Max option to to enable all normal extensions,
the dis-assembler should also add an option, -M,max to do the same thing.
For the instruction, which have overlapped encodings like zfinx, will not
be considered by the -M,max option.
opcodes/
* riscv-dis.c (all_ext): New static boolean. If set, disassemble
without checking architectire string.
(riscv_disassemble_insn): Likewise.
(parse_riscv_dis_option_without_args): Recognized -M,max option.
binutils/
* NEWS: Updated.
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xasprintf has a nicer interface and behaves like xmalloc as far as
memory is concerned, ie. no need to check a return status and the
program exits with an error on OOM.
binutils/
* dwarf.c (load_debug_sup_file): Replace asprintf with xasprintf.
* nm.c (get_elf_symbol_type, get_coff_symbol_type): Likewise.
* objdump.c (dump_ctf_indent_lines): Likewise.
* readelf.c (display_lto_symtab, dump_ctf_indent_lines): Likewise.
* windres.c (main): Likewise.
* configure.ac: Remove asprintf from AC_CHECK_DECLS.
* config.in: Regenerate.
* configure: Regenerate.
gas/
* config/tc-kvx.c (kvx_emit_single_noop): Simplify.
* config/tc-riscv.c (md_assemblef): Replace asprintf with xasprintf.
* read.c (s_nop, do_s_func): Likewise.
* stabs.c (stabs_generate_asm_func): Likewise.
(stabs_generate_asm_endfunc): Likewise.
* configure.ac: Remove asprintf from AC_CHECK_DECLS.
* config.in: Regenerate.
* configure: Regenerate.
ld/
* ldlang.c (lang_leave_overlay_section): Replace xmalloc+sprintf
with xasprintf. Localise vars.
* lexsup.c (parse_args): Replace asprintf with xasprintf.
* pe-dll.c (make_head, make_tail, make_one): Likewise.
(make_singleton_name_thunk, make_import_fixup_entry): Likewise.
(make_runtime_pseudo_reloc): Likewise.
(pe_create_runtime_relocator_reference): Likewise.
* configure.ac: Remove asprintf from AC_CHECK_DECLS.
* config.in: Regenerate.
* configure: Regenerate.
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The noxfail option is useful in situations like pr23658-1e which
fails on all microblaze ELF targets except microblaze-linux. This was
possible to handle by writing a small proc and use that as an xfail
predicate, or painstakingly listing all microblaze ELF targets, but
this is simpler. The patch also fixes some other FAILs and XPASSes of
the pr23658 tests.
binutils/
* testsuite/lib/binutils-common.exp (run_dump_test): Support
noxfail.
ld/
* testsuite/ld-elf/pr23658-1a.d: Don't xfail m68hc12.
* testsuite/ld-elf/pr23658-1e.d: Likewise. xfail xstormy16
and correct microblaze xfails.
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While for executables properly aligning sections within the file can be
quite relevant, the same is of pretty little importance for relocatable
object files. Avoid passing "true" into
_bfd_elf_assign_file_position_for_section() when dealing with object
files, but compensate minimally by applying log_file_align in such
cases as a cap to the alignment put in place.
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PR 32243
* dlltool.c: Move forward decls. Delete unnecessary ones.
(bfd_errmsg): Delete macro, define as inline function.
(PATHMAX): Delete.
(NAME_MAX): Define.
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Commit 68bbe1183379 results in a lot of follow up work, much of which
likely is still to be done. (And yes, since this is all for corrupted
or fuzzed object files, a whole lot of work doesn't much benefit
anyone. It was a bad idea to put NULL in asymbol->name.) So I'm
changing the approach to instead put a unique empty string for symbols
with a corrupted st_name. An empty string won't require much work to
ensure nm, objcopy, objdump etc. won't crash, since these tools
already must work with unnamed local symbols.
The unique empty string is called bfd_symbol_error_name. This patch
uses that name string for corrupted symbols in the ELF and COFF
backends. Such symbols are displayed by nm and objdump as the
translated string "<corrupt>", which is what the COFF backend used to
put directly into corrupted symbols.
ie. it's the way I should have written the original patch, plus a few
tides and cleanups I retained from the reverted patches.
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This reverts commit 06116013f80e474800cfb122924bc2a6f060606a.
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This reverts commit ef166f451fbc2c7b251a251ab23cd35b36c5ee23.
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* objcopy.c (is_specified_symbol): Handle NULL name.
(filter_symbols): Drop syms with a NULL name.
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For some reason, dlltool supports mcore-elf input files.
* dlltool.c (filter_symbols): Drop symbols with NULL names.
(identify_member_contains_symname): Don't consider symbols
with NULL names.
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