| Age | Commit message (Collapse) | Author | Files | Lines |
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PR 29489
* dlltool.c (deterministic): New variable.
(gen_lib_file): If deterministic is true set the
BFD_DETERMINISTIC_OUTPUT flag.
(usage): Mention --deterministic-libraries and
--non-deterministic-libraries.
(long_options): Add new options.
(main): Parse new options.
* doc/binutils.texi: Document the new options.
* NEWS: Mention the new feature.
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binutils/
* MAINTAINERS (RISC-V): Updated my email address.
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safely.
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golang object file.
* readelf.c (check_magic_number): New function. Checks the magic
bytes at the start of a file. If they are not the ELF format
magic values, then attempts to generate a helpful error message.
(process_file_header): Call check_magic_number.
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2022-08-16 Alan Modra <amodra@gmail.com>
Cunlong Li <shenxiaogll@163.com>
PR 29362
* dwarf.c (free_debug_information): New function, extracted..
(free_debug_memory): ..from here.
(process_debug_info): Use it when before clearing out unit
debug_information. Clear all fields.
* objcopy.c (delete_symbol_htabs): New function.
(main): Call it via xatexit.
(copy_archive): Free "dir".
* objdump.c (free_debug_section): Free reloc_info.
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This changes readelf output a little, removing the 0x prefix on hex
output when the value is 0, except in cases where a fixed field
width is shown. %#010x is not a good replacement for 0x%08x.
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This replaces dwarf_vma, dwarf_size_type and dwarf_signed_vma with
uint64_t and int64_t everywhere. The patch also gets rid of
DWARF_VMA_FMT since we can't use that with uint64_t, and all of the
configure support for deciding the flavour of HOST_WIDEST_INT.
dwarf_vmatoa also disappears, replacing most uses with one of
PRIx64, PRId64 or PRIu64. Printing of size_t and ptrdiff_t values
now use %z and %t rather than by casting to unsigned long. Also,
most warning messages that used 0x%lx or similar now use %#lx and a
few that didn't print the 0x hex prefix now also use %#. The patch
doesn't change normal readelf output, except in odd cases where values
previously might have been truncated.
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This replaces bfd_vma with uint64_t in readelf, defines BFD64
unconditionally, removes tests of BFD64 and sizeof (bfd_vma), and
removes quite a few now unnecessary casts.
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Replacing bfd_size_type with dwarf_size_type or uint64_t is mostly
cosmetic. The point of the change is to avoid use of a BFD type
in readelf, where we'd like to keep as independent of BFD as
possible. Also, the patch is a step towards using standard types.
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This patch replaces all uses of elf_vma with uint64_t, removes
tests of sizeof (elf_vma), and does a little tidying of
byte_get_little_endian and byte_get_big_endian.
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After commit:
commit a88c79b77036e4778e70d62081c3cfd1044bb8e3
Date: Tue Aug 9 14:57:48 2022 +0100
Default to enabling colored disassembly if output is to a terminal.
The 256 extended-color support for --disassembler-color was broken.
This is fixed in this commit.
PR 29457
* objdump (objdump_styled_sprintf): Check disassembler_color
against an enum value, don't treat it as a bool.
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This adds support for efi-loongarch64 by virtue of adding a new PEI target
pei-loongarch64. This is not a full target and only exists to support EFI at
this time.
This means that this target does not support relocation processing and is mostly
a container format. This format has been added to elf based loongarch64 targets
such that efi images can be made natively on Linux.
However this target is not valid for use with gas but only with objcopy.
We should't limit addresses to 32-bits for 64-bit vma, otherwise there will be
"RVA truncated" error when using objcopy on loongarch64.
With these changes the resulting file is recognized as an efi image.
Any magic number is based on the Microsoft PE specification [1].
The test results are as follows:
$ make check-binutils RUNTESTFLAGS='loongarch64.exp'
PASS: Check if efi app format is recognized
$ objdump -h -f tmpdir/loongarch64copy.o
tmpdir/loongarch64copy.o: file format pei-loongarch64
architecture: Loongarch64, flags 0x00000132:
EXEC_P, HAS_SYMS, HAS_LOCALS, D_PAGED
start address 0x0000000000000000
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 0000003c 00000000200000b0 00000000200000b0 00000200 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
[1] https://docs.microsoft.com/en-us/windows/win32/debug/pe-format
bfd:
* .gitignore (pe-loongarch64igen.c): New.
* Makefile.am (pei-loongarch64.lo, pe-loongarch64igen.lo, pei-loongarch64.c,
pe-loongarch64igen.c): Add support.
* Makefile.in: Likewise.
* bfd.c (bfd_get_sign_extend_vma): Add pei-loongarch64.
* coff-loongarch64.c: New file.
* coffcode.h (coff_set_arch_mach_hook, coff_set_flags,
coff_write_object_contents) Add loongarch64 (loongarch64_pei_vec) support.
* config.bfd: Likewise.
* configure: Likewise.
* configure.ac: Likewise.
* libpei.h (GET_OPTHDR_IMAGE_BASE, PUT_OPTHDR_IMAGE_BASE,
GET_OPTHDR_SIZE_OF_STACK_RESERVE, PUT_OPTHDR_SIZE_OF_STACK_RESERVE,
GET_OPTHDR_SIZE_OF_STACK_COMMIT, PUT_OPTHDR_SIZE_OF_STACK_COMMIT,
GET_OPTHDR_SIZE_OF_HEAP_RESERVE, PUT_OPTHDR_SIZE_OF_HEAP_RESERVE,
GET_OPTHDR_SIZE_OF_HEAP_COMMIT, PUT_OPTHDR_SIZE_OF_HEAP_COMMIT,
GET_PDATA_ENTRY, _bfd_peLoongArch64_bfd_copy_private_bfd_data_common,
_bfd_peLoongArch64_bfd_copy_private_section_data,
_bfd_peLoongArch64_get_symbol_info, _bfd_peLoongArch64_only_swap_filehdr_out,
_bfd_peLoongArch64_print_private_bfd_data_common,
_bfd_peLoongArch64i_final_link_postscript,
_bfd_peLoongArch64i_only_swap_filehdr_out, _bfd_peLoongArch64i_swap_aouthdr_in,
_bfd_peLoongArch64i_swap_aouthdr_out, _bfd_peLoongArch64i_swap_aux_in,
_bfd_peLoongArch64i_swap_aux_out, _bfd_peLoongArch64i_swap_lineno_in,
_bfd_peLoongArch64i_swap_lineno_out, _bfd_peLoongArch64i_swap_scnhdr_out,
_bfd_peLoongArch64i_swap_sym_in, _bfd_peLoongArch64i_swap_sym_out,
_bfd_peLoongArch64i_swap_debugdir_in, _bfd_peLoongArch64i_swap_debugdir_out,
_bfd_peLoongArch64i_write_codeview_record,
_bfd_peLoongArch64i_slurp_codeview_record,
_bfd_peLoongArch64_print_ce_compressed_pdata): New.
* peXXigen.c (_bfd_XXi_swap_aouthdr_in, _bfd_XXi_swap_aouthdr_out,
_bfd_XXi_swap_scnhdr_out, pe_print_pdata, _bfd_XX_print_private_bfd_data_common,
_bfd_XX_bfd_copy_private_section_data, _bfd_XXi_final_link_postscript):
Support COFF_WITH_peLoongArch64,
* pei-loongarch64.c: New file.
* peicode.h (coff_swap_scnhdr_in, pe_ILF_build_a_bfd, pe_ILF_object_p):
Support COFF_WITH_peLoongArch64.
(jtab): Add dummy entry that traps.
* targets.c (loongarch64_pei_vec): New.
binutils
* testsuite/binutils-all/loongarch64/loongarch64.exp: New file.
* testsuite/binutils-all/loongarch64/pei-loongarch64.d: New test.
* testsuite/binutils-all/loongarch64/pei-loongarch64.s: New test.
include
* coff/loongarch64.h: New file.
* coff/pe.h (IMAGE_FILE_MACHINE_LOONGARCH64): New.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
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PR 29457
* objdump.c (disassembler_color): Change type to an enum.
(disassembler_extended_color): Remove.
(usage): Update.
(objdump_color_for_assembler_style): Update.
(main): Update initialisation of disassembler_color. If not
initialised via a command line option, set based upon terminal
output.
* doc/binutils.texi: Update description of disassmbler-color
option.
* testsuite/binutils-all/arc/objdump.exp: Add
--disassembler-color=off option when disassembling.
* testsuite/binutils-all/arm/objdump.exp: Likewise.
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bfd_set_section_alignment currently always returns true. This patch
changes it to return false on silly alignment values, avoiding yet
another way to trigger ubsan errors like coffcode.h:3192:12: runtime
error: shift exponent 299 is too large for 32-bit type 'int'. We'll
catch that one in objcopy.c:setup_sections. However, setup_sections
gives up on other setup operations that are necessary even after an
error of some sort. Change that to keep going, which might change the
error message but that shouldn't matter in the least.
bfd/
* section.c (bfd_set_section_alignment): Return false and
don't set alignment_power for stupidly large alignments.
* bfd-in2.h: Regenerate.
* coffcode.h (coff_compute_section_file_positions): Don't use
an int constant when calculating alignment.
binutils/
* objcopy.c (setup_section): Keep on going after hitting
non-fatal errors.
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Fixes a segfault found by the fuzzers.
* dwarf.c (fetch_indexed_value): Return -1 on error.
(read_and_display_attr_value): Don't display string when
fetch_indexed_value returns an error. Sanity check loc_offsets
index.
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As before: Old enough glibc has an (unguarded) declaration of index()
in string.h, which triggers a "shadows a global declaration" warning.
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There is more work to be done to actually support compression and
decompression using the zstd library, but I will leave that to the
champions of the new compression option.
binutils/
* binutils/readelf.c (process_section_headers): Add support for
ELFCOMPRESS_ZSTD.
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BFD_VMA_FMT can't be used in format strings that need to be
translated, because the translation won't work when the type of
bfd_vma differs from the machine used to compile .pot files. We've
known about this for a long time, but patches slip through review.
So just get rid of BFD_VMA_FMT, instead using the appropriate PRId64,
PRIu64, PRIx64 or PRIo64 and SCN variants for scanf. The patch is
mostly mechanical, the only thing requiring any thought is casts
needed to preserve PRId64 output from bfd_vma values, or to preserve
one of the unsigned output formats from bfd_signed_vma values.
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These two macros print either a 16 digit hex number or an 8 digit
hex number. Unfortunately they depend on both target and host, which
means that the output for 32-bit targets may be either 8 or 16 hex
digits.
Replace them in most cases with code that prints a bfd_vma using
PRIx64. In some cases, deliberately lose the leading zeros.
This change some output, notably in base/offset fields of m68k
disassembly which I think looks better that way, and in error
messages. I've kept leading zeros in symbol dumps (objdump -t)
and in PE header dumps.
bfd/
* bfd-in.h (fprintf_vma, sprintf_vma, printf_vma): Delete.
* bfd-in2.h: Regenerate.
* bfd.c (bfd_sprintf_vma): Don't use sprintf_vma.
(bfd_fprintf_vma): Don't use fprintf_vma.
* coff-rs6000.c (xcoff_reloc_type_tls): Don't use sprintf_vma.
Instead use PRIx64 to print bfd_vma values.
(xcoff_ppc_relocate_section): Likewise.
* cofflink.c (_bfd_coff_write_global_sym): Likewise.
* mmo.c (mmo_write_symbols_and_terminator): Likewise.
* srec.c (srec_write_symbols): Likewise.
* elf32-xtensa.c (print_r_reloc): Similarly for fprintf_vma.
* pei-x86_64.c (pex64_dump_xdata): Likewise.
(pex64_bfd_print_pdata_section): Likewise.
* som.c (som_print_symbol): Likewise.
* ecoff.c (_bfd_ecoff_print_symbol): Use bfd_fprintf_vma.
opcodes/
* dis-buf.c (perror_memory, generic_print_address): Don't use
sprintf_vma. Instead use PRIx64 to print bfd_vma values.
* i386-dis.c (print_operand_value, print_displacement): Likewise.
* m68k-dis.c (print_base, print_indexed): Likewise.
* ns32k-dis.c (print_insn_arg): Likewise.
* ia64-gen.c (_opcode_int64_low, _opcode_int64_high): Delete.
(opcode_fprintf_vma): Delete.
(print_main_table): Use PRIx64 to print opcode.
binutils/
* od-macho.c: Replace all uses of printf_vma with bfd_printf_vma.
* objcopy.c (copy_object): Don't use sprintf_vma. Instead use
PRIx64 to print bfd_vma values.
(copy_main): Likewise.
* readelf.c (CHECK_ENTSIZE_VALUES): Likewise.
(dynamic_section_mips_val): Likewise.
(print_vma): Don't use printf_vma. Instead use PRIx64 to print
bfd_vma values.
(dump_ia64_vms_dynamic_fixups): Likewise.
(process_version_sections): Likewise.
* rddbg.c (stab_context): Likewise.
gas/
* config/tc-i386.c (offset_in_range): Don't use sprintf_vma.
Instead use PRIx64 to print bfd_vma values.
(md_assemble): Likewise.
* config/tc-mips.c (load_register, macro): Likewise.
* messages.c (as_internal_value_out_of_range): Likewise.
* read.c (emit_expr_with_reloc): Likewise.
* config/tc-ia64.c (note_register_values): Don't use fprintf_vma.
Instead use PRIx64 to print bfd_vma values.
(print_dependency): Likewise.
* listing.c (list_symbol_table): Use bfd_sprintf_vma.
* symbols.c (print_symbol_value_1): Use %p to print pointers.
(print_binary): Likewise.
(print_expr_1): Use PRIx64 to print bfd_vma values.
* write.c (print_fixup): Use %p to print pointers. Don't use
fprintf_vma.
* testsuite/gas/all/overflow.l: Update expected output.
* testsuite/gas/m68k/mcf-mov3q.d: Likewise.
* testsuite/gas/m68k/operands.d: Likewise.
* testsuite/gas/s12z/truncated.d: Likewise.
ld/
* deffilep.y (def_file_print): Don't use fprintf_vma. Instead
use PRIx64 to print bfd_vma values.
* emultempl/armelf.em (gld${EMULATION_NAME}_finish): Don't use
sprintf_vma. Instead use PRIx64 to print bfd_vma values.
* emultempl/pe.em (gld${EMULATION_NAME}_finish): Likewise.
* ldlang.c (lang_map): Use %V to print region origin.
(lang_one_common): Don't use sprintf_vma.
* ldmisc.c (vfinfo): Don't use fprintf_vma or sprintf_vma.
* pe-dll.c (pe_dll_generate_def_file): Likewise.
gdb/
* remote.c (remote_target::trace_set_readonly_regions): Replace
uses of sprintf_vma with bfd_sprintf_vma.
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When adding libopcodes disassembler styling support for AArch64, it
feels like the results would be improved by having a new sub-mnemonic
style. This will be used in cases like:
add w16, w7, w1, uxtb #2
^^^^----- Here
And:
cinc w0, w1, ne
^^----- Here
This commit just adds the new style, and prepares objdump to handle
the style. A later commit will add AArch64 styling, and will actually
make use of the style.
As this style is currently unused, there should be no user visible
changes after this commit.
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Some R_LARCH_64 in section .eh_frame will to generate
R_LARCH_NONE, we change relocation to R_LARCH_32_PCREL
from R_LARCH_64 in setction .eh_frame and not generate
dynamic relocation for R_LARCH_32_PCREL.
Add New relocate type R_LARCH_32_PCREL for .eh_frame.
include/elf/
loongarch.h
bfd/
bfd/bfd-in2.h
libbfd.h
reloc.c
elfxx-loongarch.c
elfnn-loongarch.c
gas/config/
tc-loongarch.c
binutils/
readelf.c
ld/testsuite/ld-elf/
eh5.d
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sbrk hasn't been used in binutils/ or ld/ for quite some time (so the
PR was fixed a while ago). Tidy up configury.
PR 17122
binutils/
* configure.ac: Don't check for sbrk.
* sysdep.h (sbrk): Don't supply fallback declaration.
* config.in: Regenerate.
* configure: Regenerate.
ld/
* configure.ac: Don't check for sbrk.
* config.in: Regenerate.
* configure: Regenerate.
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PR 15951
* testsuite/binutils-all/objcopy.exp: Build testglue.o when
needs_status_wrapper.
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PR 29390
binutils/
* dwarf.c (is_aarch64, DW_CFA_GNU_window_save_name): New.
(display_debug_frames): Use them.
(init_dwarf_regnames_aarch64): Set is_aarch64.
(init_dwarf_regnames_by_elf_machine_code): Clear is_aarch64.
(init_dwarf_regnames_by_bfd_arch_and_mach): Likewise.
gas/
* testsuite/gas/aarch64/pac_ab_key.d: Adjust expected output.
* testsuite/gas/aarch64/pac_negate_ra_state.d: Likewise.
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Commit 244e19c79111 changed a number of variables in display_gdb_index
to count entries rather than words.
PR 29337
* dwarf.c (display_gdb_index): Correct use of cu_list_elements.
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The PR29370 testcase is a fuzzed object file with multiple
.trace_abbrev sections. Multiple .trace_abbrev or .debug_abbrev
sections are not a violation of the DWARF standard. The DWARF5
standard even gives an example of multiple .debug_abbrev sections
contained in groups. Caching and lookup of processed abbrevs thus
needs to be done by section and offset rather than base and offset.
(Why base anyway?) Or, since section contents are kept, by a pointer
into the contents.
PR 29370
* dwarf.c (struct abbrev_list): Replace abbrev_base and
abbrev_offset with raw field.
(find_abbrev_list_by_abbrev_offset): Delete.
(find_abbrev_list_by_raw_abbrev): New function.
(process_abbrev_set): Set list->raw and list->next.
(find_and_process_abbrev_set): Replace abbrev list lookup with
new function. Don't set list abbrev_base, abbrev_offset or next.
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I'm inclined to think that abbrev caching is counter-productive. The
time taken to search the list of abbrevs converted to internal form is
non-zero, and it's easy to decode the raw abbrevs. It's especially
silly to cache empty lists of decoded abbrevs (happens with zero
padding in .debug_abbrev), or abbrevs as they are displayed when there
is no further use of those abbrevs. This patch stops caching in those
cases.
* dwarf.c (record_abbrev_list_for_cu): Add free_list param.
Put abbrevs on abbrev_lists here.
(new_abbrev_list): Delete function.
(process_abbrev_set): Return newly allocated list. Move
abbrev base, offset and size checking to..
(find_and_process_abbrev_set): ..here, new function. Handle
lookup of cached abbrevs here, and calculate start and end
for process_abbrev_set. Return free_list if newly alloc'd.
(process_debug_info): Consolidate cached list lookup, new list
alloc and processing into find_and_process_abbrev_set call.
Free list when not cached.
(display_debug_abbrev): Similarly.
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* dwarf.c: Leading and trailing whitespace fixes.
(free_abbrev_list): New function.
(free_all_abbrevs): Use the above. Free cu_abbrev_map here too.
(process_abbrev_set): Print actual section name on error.
(get_type_abbrev_from_form): Add overflow check.
(free_debug_memory): Don't free cu_abbrev_map here..
(process_debug_info): ..or here. Warn on another case of not
finding a neeeded abbrev.
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The Linux kernel can dump memory tag segments to a core file, one segment
per mapped range. The format and documentation can be found in the Linux
kernel tree [1].
The following patch adjusts bfd and binutils so they can handle this new
segment type and display it accordingly. It also adds code required so GDB
can properly read/dump core file data containing memory tags.
Upon reading, each segment that contains memory tags gets mapped to a
section named "memtag". These sections will be used by GDB to lookup the tag
data. There can be multiple such sections with the same name, and they are not
numbered to simplify GDB's handling and lookup.
There is another patch for GDB that enables both reading
and dumping of memory tag segments.
Tested on aarch64-linux Ubuntu 20.04.
[1] Documentation/arm64/memory-tagging-extension.rst (Core Dump Support)
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Until we update the recommended versions of autoconf/automake, files
should be regenerated with automake-1.15.1 and autoconf-2.69. That's
not because we think those versions are golden, and newer versions are
bad. It's simply because maintainers want to be able to update
configury files without trouble, and if someone regenerates files with
automake-1.16.5 then --enable-maintainer-mode builds will hit errors:
checking that generated files are newer than configure... configure.ac:26: error: version mismatch. This is Automake 1.15.1,
configure.ac:26: but the definition used by this AM_INIT_AUTOMAKE
configure.ac:26: comes from Automake 1.16.5. You should recreate
configure.ac:26: aclocal.m4 with aclocal and run automake again.
WARNING: 'automake-1.15' is probably too old.
Correcting this requires regenerating the files by hand.
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DW_AT_rank is a dwarf-5 feature.
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Adding support for location and range lists for split-dwarf and dwarf-5.
Following issues are taken care.
1. Display of the index values for DW_FORM_loclistx and DW_FORM_rnglistx.
2. Display of .debug_loclists.dwo and .debug_rnglists.dwo sections.
* dwarf.c(read_and_display_attr_value): Handle DW_FORM_loclistx
and DW_FORM_rnglistx for .dwo files.
(process_debug_info): Load .debug_loclists.dwo and
.debug_rnglists.dwo if exists.
(load_separate_debug_files): Load .debug_loclists and
.debug_rnglists if exists.
Include 2 entries in debug_displays table.
* dwarf.h (enum dwarf_section_display_enum): Include 2 entries.
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This fixes an inconsequential objcopy memory leak. I'd normally
ignore reports of leaks like this one, that are merely one block or
fewer per section processed, since objcopy soon exits and frees all
memory. However I thought it worth providing support for allocating
memory on a bfd objalloc in objcopy and other utils.
PR 29233
* bucomm.c (bfd_xalloc): New function.
* bucomm.h (bfd_xalloc): Declare.
* objcopy.c (copy_relocations_in_section): Use it to allocate
array of reloc pointers. Rewrite code stripping relocs to do
without extra memory allocation.
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* dwarf.c(process_debug_info): Include DW_TAG_skeleton_unit.
(display_debug_str_offsets): While dumping .debug_str_offsets.dwo,
pass proper str_offsets_base to fetch_indexed_string().
(load_separate_debug_files): Skip DWO ID dump for dwarf-5.
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* dwarf.c (dwarf_select_sections_by_name): If the entry's value is
zero then clear the corresponding variable.
(dwarf_select_sections_by_letters): Likewise.
* testsuite/binutils-all/debuginfo.exp: Expect -WE and -wE
debuginfod tests to fail.
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This patch ensures that the gcc binary called by windres is quoted if
needed. Otherwise, errors can occur if the gcc is under a folder having
a name containing a space (eg "Program Files").
binutils/
* resrc.c (DEFAULT_PREPROCESSOR): Split into...
(DEFAULT_PREPROCESSOR_CMD): that...
(DEFAULT_PREPROCESSOR_ARGS): and that.
(look_for_default): Add quotes around the command if needed.
(read_rc_file): Adapt to new defines.
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DW_FORM_rnglistx. Correct the display of .debug.loclists sections.
PR 29267
* dwarf.c (display_debug_rnglists): New function, broken out of..
(display_debug_ranges): ... here.
(read_and_display_attr_value): Correct calculation of index
displayed for DW_FORM_loclistx and DW_FORM_rnglistx.
* testsuite/binutils-all/x86-64/pr26808.dump: Update expected
output.
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corrupt DWARF data.
PR 29289
* dwarf.c (display_debug_names): Replace assert with a warning
message.
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PR 29290
* dwarf.c (read_and_display_attr_value): Check that debug_info_p
is set before dereferencing it.
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* dwarf.c (fetch_indexed_string): Do not use length of first table
in string section as the length of every table in the section.
* testsuite/binutils-all/pr26112.r: Update expected output.
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Commit 04f096fb9e25 ("Move the xc16x target to the obsolete list") moved
the architecture from the "obsolete but still available" to the
"obsolete / support removed" list in config.bfd, making the architecture
impossible to enable (except maybe via "enable everything" options").
Note that I didn't touch */po/*.po{,t} on the assumption that these
would be updated by some (half)automatic means.
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For clang compiled objects with dwarf-5, location list offset address dump
under DW_AT_location is corrected, where DW_FORM_loclistx is used. While
dumping the location list offset, the address dumped is wrong where it was
refering to .debug_addr instead of .debug_loclists
* dwarf.c (fetch_indexed_value): Add base_address as parameter and
use it to access the section offset.
(read_and_display_attr_value): Handle DW_FORM_loclistx form separately.
Pass loclists_base to fetch_indexed_value().
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* dwarf.c (fetch_indexed_string): Added new parameter
str_offsets_base to calculate the string offset.
(read_and_display_attr_value): Read DW_AT_str_offsets_base
attribute.
(process_debug_info): While allocating memory and initializing
debug_information, do it for do_debug_info also, if its true.
(load_separate_debug_files): Load .debug_str_offsets if exists.
* dwarf.h (struct debug_info): Add str_offsets_base field.
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