Seen on Ubuntu 23.04 x86_64-linux using gcc-12.2 and gcc-12.3 with
CFLAGS="-m32 -g -O2 -fsanitize=address,undefined".
CC objdump.o
In file included from /usr/include/stdio.h:906,
from /home/alan/src/binutils-gdb/binutils/sysdep.h:24,
from /home/alan/src/binutils-gdb/binutils/objdump.c:51:
In function 'sprintf',
inlined from 'display_utf8' at /home/alan/src/binutils-gdb/binutils/objdump.c:621:14,
inlined from 'sanitize_string.part.0' at /home/alan/src/binutils-gdb/binutils/objdump.c:742:11:
/usr/include/bits/stdio2.h:30:10: error: null destination pointer [-Werror=format-overflow=]
30 | return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
31 | __glibc_objsize (__s), __fmt,
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
32 | __va_arg_pack ());
| ~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
The warning is bogus of course. xmalloc is guaranteed to return
non-NULL, but apparently this isn't seen in display_utf6. The same
doesn't happen with -m64, maybe due to inlining differences, I haven't
investigated fully. Easily avoided as we hardly need to use sprintf
for a single char, or a two char string.
* objdump.c (display_utf8): Avoid bogus sprintf sanitizer warning.
Use hex ESC to switch back to default colour.
(sanitize_string): Comment. Bump buffer size by one. Fix overlong
line.
* nm.c (display_utf8, sanitize_string): As above.
Commit e3f450f3933d resulted in a nm -l segfault on object files
without undefined symbols. Fix that, and be paranoid about bfd
section count changing.
* nm.c (struct lineno_cache): Add seccount.
(free_lineno_cache): Don't segfault on NULL lc->relocs.
(print_symbol): Stash section count when creating arrays.
Many of the fatal errors in nm ought to be recoverable. This patch
downgrades most of them. The ones that are left are most likely due
to memory allocation failures.
* nm.c (print_symdef_entry): Don't bomb with a fatal error
on a corrupted archive symbol table.
(filter_symbols): Silently omit symbols that return NULL
from bfd_minisymbol_to_symbol rather than giving a fatal
error.
(display_rel_file): Don't give a fatal error on
bfd_read_minisymbols returning an error, or on not being able
to read dynamic symbols for synth syms.
(display_archive): Downgrade bfd_openr_next_archived_file
error.
(display_file): Don't bomb on a bfd_close failure.
Replace the static variables used by nm to cache line number info
with a struct attached to the bfd. Cleaner, and it avoids any concern
that lineno_cache_bfd is somehow left pointing at memory for a closed
bfd and that memory is later reused for another bfd, not that I think
this is possible. Also don't bomb via bfd_fatal on errors getting
the line number info, just omit the line numbers.
* nm.c (struct lineno_cache): Rename from get_relocs_info.
Add symcount.
(lineno_cache_bfd, lineno_cache_rel_bfd): Delete.
(get_relocs): Adjust for struct rename. Don't call bfd_fatal
on errors.
(free_lineno_cache): New function.
(print_symbol): Use lineno_cache in place of statics. Don't
call bfd_fatal on errors reading symbols, just omit the line
info.
(display_archive, display_file): Call free_lineno_cache.
I don't see much point in cluttering the source with the PROGRESS
macros, which of course do nothing at all with the definitions in
progress.h. progress.h is unchanged apart from the copyright comment
since commit d4d4c53c68f0 in 1994.
binutils/
* ar.c: Don't include progress.h, or invoke PROGRESS macros.
* nm.c: Likewise.
* objcopy.c: Likewise.
* objdump.c: Likewise.
gas/
* as.h: Don't include progress.h.
* as.c: Don't invoke PROGRESS macros.
* write.c: Likewise.
include/
* progress.h: Delete.
ld/
* ldmain.c: Don't include progress.h, or invoke PROGRESS macros.
The newer update-copyright.py fixes file encoding too, removing cr/lf
on binutils/bfdtest2.c and ld/testsuite/ld-cygwin/exe-export.exp, and
embedded cr in binutils/testsuite/binutils-all/ar.exp string match.
Requiring C99 means that uses of bfd_uint64_t can be replaced with
uint64_t, and similarly for bfd_int64_t, BFD_HOST_U_64_BIT, and
BFD_HOST_64_BIT. This patch does that, removes #ifdef BFD_HOST_*
and tidies a few places that print 64-bit values.
PR 29135
* nm.c (non_weak): New variable.
(filter_symbols): When non-weak is true, ignore weak symbols.
(long_options): Add --no-weak.
(usage): Mention --no-weak.
(main): Handle -W/--no-weak.
* doc/binutils.texi: Document new feature.
* NEWS: Mention the new feature.
* testsuite/binutils-all/nm.exp: Add test of new feature.
* testsuite/binutils-all/no-weak.s: New test source file.
The result of running etc/update-copyright.py --this-year, fixing all
the files whose mode is changed by the script, plus a build with
--enable-maintainer-mode --enable-cgen-maint=yes, then checking
out */po/*.pot which we don't update frequently.
The copy of cgen was with commit d1dd5fcc38ead reverted as that commit
breaks building of bfp opcodes files.
Extract allowed styles from libiberty, so we don't have to worry about
our help messages getting out of date. The function probably belongs
in libiberty/cplus-dem.c but it can be here for a while to iron out
bugs.
PR 28581
* demanguse.c: New file.
* demanguse.h: New file.
* nm.c (usage): Break up output. Use display_demangler_styles.
* objdump.c (usage): Use display_demangler_styles.
* readelf.c (usage): Likewise.
* Makefile.am: Add demanguse.c and demanguse.h.
* Makefile.in: Regenerate.
* po/POTFILESin: Regenerate.
* nm.c: Add --unicode option to control how unicode characters are
handled.
* objdump.c: Likewise.
* readelf.c: Likewise.
* strings.c: Likewise.
* binutils.texi: Document the new feature.
* NEWS: Document the new feature.
* testsuite/binutils-all/unicode.exp: New file.
* testsuite/binutils-all/nm.hex.unicode
* testsuite/binutils-all/strings.escape.unicode
* testsuite/binutils-all/objdump.highlight.unicode
* testsuite/binutils-all/readelf.invalid.unicode
bfd * linker.c (_bfd_generic_link_add_one_symbol): Test for a NULL
name before checking to see if the symbol is __gnu_lto_slim.
* archive.c (_bfd_compute_and_write_armap): Likewise.
binutils
* nm.c (filter_symbols): Test for a NULL name before checking to
see if the symbol is __gnu_lto_slim.
* objcopy.c (filter_symbols): Likewise.
PR 27487
* nm.c (FORMAT_JUST_SYMBOLS): Define.
(struct optput_fns): Add entry for FORMAT_JUST_SYMBOLS.
(long_options): Add just-symbols.
(set_output_format): Add support for just-symbols.
(get_print_format): Likewise.
(do_not_print_object_filename): New function.
(do_not_print_archive_filename): New function.
(do_not_print_archive_member): New function.
(do_not_print_symbol_filename): New function.
(just_print_symbol_name): New function.
(main): Handle --just-symbols.
* NEWS: Mention the new feature.
* doc/binutils.texi: Document the new feature.
PR binutils/27408
* readelf.c (quiet): New option flag.
(enum long_option_values): New enum to hold long option value.
(long_options): Add --quiet.
(usage): Mention --quiet.
(display_rel_file): If quiet is enabled, suppress "no symbols".
(main): Handle the new option.
* NEWS: Mention --quiet.
* docs/binutils.texi: Document --quiet.
binutils/
PR 27128
* nm.c (print_symname): Append version string to symbol name
before printing the lot under control of "form". Append version
to demangled names too.
ld/
PR 27128
* testsuite/ld-elf/pr27128.s: New file.
* testsuite/ld-elf/pr27128.t: Likewise.
* testsuite/ld-elf/pr27128a.d: Likewise.
* testsuite/ld-elf/pr27128b.d: Likewise.
* testsuite/ld-elf/pr27128c.d: Likewise.
* testsuite/ld-elf/pr27128d.d: Likewise.
* testsuite/ld-elf/pr27128e.d: Likewise.
PR 22967
* nm.c (ifunc_type_chars): New variable.
(long_options): Add --ifunc-chars.
(print_symbol): Use ifunc_type_chars for ifunc symbols.
(main): Handle the new option.
* doc/binutils.texi: Document the new option.
* configure.ac: Add --enable-f-for-ifunc-symbols option which
changes the default symbol displayed by nm.
* NEWS: Mention the new feature.
* testsuite/binutils-all/nm.exp: Test the new feature.
* config.in: Regenerate.
* configure: Regenerate.
The symbol string table in the .symtab section is optional and cosmetic.
Keep only one '@' for undefined versioned symbols, which are defined in
shared objects, in the symbol string table. Update "nm -D" to display
only one '@' for undefined versioned symbols.
bfd/
PR ld/26382
* elflink.c (elf_link_output_symstrtab): Keep only one '@' for
versioned symbols, which are defined in shared objects, in
symbol string table.
binutils/
PR ld/26382
* nm.c (print_symname): Display only one '@' for undefined
versioned symbols.
* doc/binutils.texi: Update nm version information.
ld/
PR ld/26382
* testsuite/ld-elf/pr26302.nd: Updated.
* testsuite/ld-elf/pr26302.rd: New file.
* testsuite/ld-elf/shared.exp: Add a test for readelf -sW.
Extend _bfd_elf_get_symbol_version_string for nm -D to display symbol
version. _bfd_elf_get_symbol_version_name is added to avoid updating
all XXX_get_symbol_version_string functions.
bfd/
PR binutils/25708
* elf-bfd.h (_bfd_elf_get_symbol_version_name): New.
* elf.c (_bfd_elf_get_symbol_version_name): New function. Based
on the previous _bfd_elf_get_symbol_version_string.
(_bfd_elf_get_symbol_version_string): Use it.
binutils/
PR binutils/25708
* nm.c (SYM_NAME): Removed.
(print_symname): Add a pointer to struct extended_symbol_info
argument. Call _bfd_elf_get_symbol_version_name to get symbol
version.
(print_symdef_entry): Pass NULL to print_symname.
(print_symbol_info_bsd): Update call to print_symname.
(print_symbol_info_sysv): Likewise.
(print_symbol_info_posix): Likewise.
ld/
PR binutils/25708
* testsuite/ld-elf/pr25708.d: New file.
Since ar and ranlib don't need to know symbol types to work properly,
we should avoid calling lto-wrapper for them to speed them up.
bfd/
PR binutils/25584
* plugin.c (need_lto_wrapper_p): New.
(bfd_plugin_set_program_name): Add an int argument to set
need_lto_wrapper_p.
(get_lto_wrapper): Return FALSE if need_lto_wrapper_p isn't
set.
* plugin.h (bfd_plugin_set_program_name): Add an int argument.
binutils/
PR binutils/25584
* ar.c (main): Pass 0 to bfd_plugin_set_program_name.
* nm.c (main): Pass 1 to bfd_plugin_set_program_name.
Using saved_format breaks when nm is presented with multiple object
files, some 32-bit and some 64-bit.
PR 25031
* nm.c (print_format_string): New.
(get_print_format): Delete saved_format. Move earlier.
(set_print_width): Call get_print_format.
(print_value): Use print_format_string.
PR 24507
* nm.c: (print_format): New variable.
(value_format_32bit, value_format_64bit): Delete.
(set_print_radix): Remove code to alter value_format strings.
(set_output_format): Record chosen format in print_format.
(get_print_format): New function - constructs a printf formatting
string according to the requirements of size, radix, and output
format.
(print_value): Use get_print_format.
* testsuite/binutils-all/nm.exp: Add tests of "nm --format=posix"
and "nm -t d".
bfd/
PR 23952
* syms.c (_bfd_generic_read_minisymbols): Free syms before
returning with zero symcount.
binutils/
* nm.c (display_rel_file): Use xrealloc to increase minisyms
for synthetic symbols.
This patch addresses the multitude of bug reports about resource exhaustion
in libiberty's name demangling code. It adds a limit to the amount of
recursion that is allowed, before an error is triggered. It also adds a
new demangling option to disable this limit. (The limit is enabled by
default).
PR 87681
PR 87675
PR 87636
PR 87335
libiberty * cp-demangle.h (struct d_info): Add recursion_limit field.
* cp-demangle.c (d_function_type): If the recursion limit is
enabled and reached, return with a failure result.
(d_demangle_callback): If the recursion limit is enabled, check
for a mangled string that is so long that there is not enough
stack space for the local arrays.
* cplus-dem.c (struct work): Add recursion_level field.
(demangle_nested_args): If the recursion limit is enabled and
reached, return with a failure result.
include * demangle.h (DMGL_RECURSE_LIMIT): Define.
(DEMANGLE_RECURSION_LIMIT): Prototype.
binutuils * addr2line.c (demangle_flags): New static variable.
(long_options): Add --recurse-limit and --no-recurse-limit.
(translate_address): Pass demangle_flags to bfd_demangle.
(main): Handle --recurse-limit and --no-recurse-limit options.
* cxxfilt.c (flags): Add DMGL_RECURSE_LIMIT.
(long_options): Add --recurse-limit and --no-recurse-limit.
(main): Handle new options.
* dlltool.c (gen_def_file): Include DMGL_RECURSE_LIMIT in flags
passed to cplus_demangle.
* nm.c (demangle_flags): New static variable.
(long_options): Add --recurse-limit and --no-recurse-limit.
(main): Handle new options.
* objdump.c (demangle_flags): New static variable.
(usage): Add --recurse-limit and --no-recurse-limit.
(long_options): Likewise.
(objdump_print_symname): Pass demangle_flags to bfd_demangle.
(disassemble_section): Likewise.
(dump_dymbols): Likewise.
(main): Handle new options.
* prdbg.c (demangle_flags): New static variable.
(tg_variable): Pass demangle_flags to demangler.
(tg_start_function): Likewise.
* stabs.c (demangle_flags): New static variable.
(stab_demangle_template): Pass demangle_flags to demangler.
(stab_demangle_v3_argtypes): Likewise.
(stab_demangle_v3_arg): Likewise.
* doc/binutuls.texi: Document new command line options.
* NEWS: Mention the new feature.
* testsuite/config/default.exp (CXXFILT): Define if not already
defined.
(CXXFILTFLAGS): Likewise.
* testsuite/binutils-all/cxxfilt.exp: New file. Runs a few
simple tests of the cxxfilt program.
This patch performs a run-time test that a shared libbfd.so has been
compiled with the same size bfd_vma as that of apps using the library.
On a 32-bit host it is easily possible to have one libbfd.so compiled
to support 64-bit targets (or configured with --enable-64-bit-bfd)
while another only supports 32-bit targets. The two libraries will
have differently sized bfd_vma types, and if the wrong one is loaded
all sorts of weird behaviour might be seen.
bfd/
PR 23534
* init.c (BFD_INIT_MAGIC): Define.
(bfd_init): Return BFD_INIT_MAGIC.
bfd-in2.h: Regenerate.
binutils/
PR 23534
* addr2line.c (main): Exit with fatal error if bfd_init
returns an unexpected value.
* ar.c (main): Likewise.
* dlltool.c (identify_dll_for_implib): Likewise.
* nm.c (main): Likewise.
* objcopy.c (main): Likewise.
* objdump.c (main): Likewise.
* size.c (main): Likewise.
* strings.c (main): Likewise.
* windmc.c (main): Likewise.
* windres.c (main): Likewise.
gas/
PR 23534
* as.c (main): Exit with fatal error if bfd_init returns an
unexpected value.
ld/
PR 23534
* ldmain.c (main): Exit with fatal error if bfd_init returns
an unexpected value.
Symbols like *ABS* defined in bfd/section.c:global_syms are not
elf_symbol_type. They can appear on relocs and perhaps other places
in an ELF bfd, so a number of places in nm.c and objdump.c are wrong
to cast an asymbol based on the bfd being ELF. I think we lose
nothing by excluding all section symbols, not just the global_syms.
PR 22443
* nm.c (sort_symbols_by_size): Don't attempt to access
section symbol internal_elf_sym.
(print_symbol): Likewise. Don't call bfd_get_symbol_version_string
for section symbols.
* objdump.c (compare_symbols): Don't attempt to access
section symbol internal_elf_sym.
(objdump_print_symname): Don't call bfd_get_symbol_version_string
for section symbols.
Some targets prefix global symbols with "_".
bfd/
* archive.c (_bfd_compute_and_write_armap): Match "__gnu_lto_slim"
optionally prefixed with "_".
* linker.c (_bfd_generic_link_add_one_symbol): Likewise.
binutils/
* nm.c (filter_symbols): Match "__gnu_lto_slim" optionally prefixed
with "_".
gold/
* symtab.cc (Symbol_table::add_from_relobj): Match "__gnu_lto_slim"
optionally prefixed with "_".
ld/
* testsuite/ld-plugin/lto-3r.d: Match "__gnu_lto_v" optionally
prefixed with "_".
* testsuite/ld-plugin/lto-5r.d: Likewise.
The attached patch fixes a problem where nm displays bogus information for
synthetic symbol sizes when --size-sort is used.
This happens because the synthetic symbols (dot symbols for ppc64) are
generated based on their non-dot symbols. The generation process doesn't copy
over the ELF-specific bits of the regular non-dot symbols.
When --size-sort is used, the code attempts to access the symbol size from
the ELF-specific bits and ends up reading gargabe, causing the size to be
displayed incorrectly.
With the patch, i can see dot and non-dot symbols having the same size with
--size-sort.
This doesn't fix the fact that we don't display size information for synthetic
symbols without --size-sort, which i may address in the future.
binutils/ChangeLog:
2016-12-01 Luis Machado <lgustavo@codesourcery.com>
* nm.c (sort_symbols_by_size): Don't read symbol size if symbol
is synthetic.
