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4 daysobjdump, readelf: sframe: apply relocations before textual dumpIndu Bhagat1-40/+10
PR libsframe/32589 - function start address is zero in SFrame section dump Currently, readelf and objdump display the SFrame sections in ET_REL object files with function start addresses of each function as 0. This makes it difficult to correlate SFrame stack trace information with the individual functions in the object file. For objdump, use the dump_dwarf () interface to dump SFrame section. Similarly, for readelf, use the display_debug_section () interface to dump SFrame section. These existing interfaces (for DWARF debug sections) already support relocating the section contents before dumping, so lets use them for SFrame sections as well. When adding a new entry for SFrame in debug_option_table[], use char 'nil' and the option name of "sframe-internal-only". This is done so that there is no additional (unnecessary) user-exposed ways of dumping SFrame sections. Additionally, we explicitly disallow the "sframe-internal-only" from external/user input in --dwarf (objdump). Similarly, "sframe-internal-only" is explicitly matched and disallowed from --debug-dump (readelf). For objdump and readelf, we continue to keep the same error messaging as earlier: $ objdump --sframe=sframe bubble_sort.o ... No sframe section present $ objdump --sframe=.sfram bubble_sort.o ... No .sfram section present $ objdump --sframe=sframe-internal-only sort ... No sframe-internal-only section present Similarly for readelf: $ readelf --sframe= bubble_sort.o readelf: Error: Section name must be provided $ readelf --sframe=.sfram bubble_sort.o readelf: Warning: Section '.sfram' was not dumped because it does not exist $ readelf --sframe=sframe bubble_sort.o readelf: Warning: Section 'sframe' was not dumped because it does not exist PS: Note how this patch adds a new entry to debug_displays[] with a relocate value set to FALSE. This will be set to TRUE in a subsequent patch ("bfd: gas: ld: libsframe: emit func start addr field as an offset from FDE") when fixes are made to emit the value of the 'sfde_func_start_address' field in the new encoding SFRAME_F_FDE_FUNC_START_PCREL across gas and ld. binutils/ * dwarf.c (display_sframe): New definition. (dwarf_select_sections_all): Enable SFrame section too. (struct dwarf_section_display): Add entry for SFrame section. * dwarf.h (enum dwarf_section_display_enum): Add enumerator for SFrame. * objdump.c (dump_section_sframe): Remove. (dump_sframe_section): Add new definition. (dump_bfd): Use dump_sframe_section. * binutils/readelf.c (dump_section_as_sframe): Remove.
2025-06-25readelf: invalid error message triggered when last tag is an empty stringMatthieu Longo1-2/+6
Disclaimer: this issue cannot occur with Object Attributes v1 (OAv1) while using the GNU binutils because a value of '\0' (empty string) for a tag with a string value is considered as the default value for the attribute, and consequently is eliminated by gas from the output object file during the serialization. An empty string is a valid value for a NTBS tag in both OAv1 and OAv2 [1] cases. However, contrarily to OAv1, a OAv2 subsection can be required and so, tags in this subsection might have to be present even if the value is the default. To comply with this requirement, the OAv2 serializer won't drop the default values. In the case where a NTBS tag has the value '\0' and is last in the object attributes section, the current code in readelf used for dumping the object attributes incorrectly detects an overflow, and prints out an error message for a corrupted string tag. This patch fixes the detection of the overflow so that it now accept an empty string in the last tag of the object attributes section. It also fixes the previous tests for the empty NTBS case and the non-null terminated string one. The fix was also tested in the context of OAv2's patch series [1] where the issue was originally detected. No regression was found. [1]: https://inbox.sourceware.org/binutils/20250509151319.88725-1-matthieu .longo@arm.com/
2025-06-24RISC-V: Add GNU_PROPERTY_RISCV_FEATURE_1_CFI_SS and ↵Kito Cheng1-0/+39
GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_UNLABELED This patch adds two new GNU properties for RISC-V: GNU_PROPERTY_RISCV_FEATURE_1_CFI_SS and GNU_PROPERTY_RISCV_FEATURE_1_CFI_LP_UNLABELED. We only add readelf and define the properties in this patch. Ref: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/417
2025-03-04clean-up readelf: simplify and flatten body of process_attributesMatthieu Longo1-164/+153
- use find_section_by_type() instead of a for-loop. - reindent the whole function accordingly. - move declaration of variables nearer from their usage. - prune else branch by using a goto in the error case. diff --git a/binutils/readelf.c b/binutils/readelf.c index 6d3ec65a8a1..878012da8f0 100644 --- a/binutils/readelf.c +++ b/binutils/readelf.c @@ -19268,42 +19268,32 @@ process_attributes (Filedata * filedata, unsigned char * (* display_pub_attribute) (unsigned char *, const unsigned char * const), unsigned char * (* display_proc_gnu_attribute) (unsigned char *, unsigned int, const unsigned char * const)) { - Elf_Internal_Shdr * sect; - unsigned i; - bool res = true; - /* Find the section header so that we get the size. */ - for (i = 0, sect = filedata->section_headers; - i < filedata->file_header.e_shnum; - i++, sect++) - { - unsigned char * contents; - unsigned char * p; + Elf_Internal_Shdr * sect = find_section_by_type (filedata, proc_type); + if (sect == NULL) + sect = find_section_by_type (filedata, SHT_GNU_ATTRIBUTES); - if (sect->sh_type != proc_type && sect->sh_type != SHT_GNU_ATTRIBUTES) - continue; + if (sect == NULL) + /* No section, exit without error. */ + return true; - contents = (unsigned char *) get_data (NULL, filedata, sect->sh_offset, 1, - sect->sh_size, _("attributes")); + unsigned char * contents = (unsigned char *) + get_data (NULL, filedata, sect->sh_offset, 1, sect->sh_size, _("attributes")); if (contents == NULL) - { - res = false; - continue; - } + return false; - p = contents; + bool res = true; + unsigned char * p = contents; /* The first character is the version of the attributes. Currently only version 1, (aka 'A') is recognised here. */ if (*p != 'A') { printf (_("Unknown attributes version '%c'(%d) - expecting 'A'\n"), *p, *p); res = false; + goto free_data; } - else - { - uint64_t section_len; - section_len = sect->sh_size - 1; + uint64_t section_len = sect->sh_size - 1; p++; while (section_len > 0) @@ -19456,10 +19446,9 @@ process_attributes (Filedata * filedata, attr_len = 0; } } - } +free_data: free (contents); - } return res; }
2025-03-04clean-up: fix conflicting symbol with unknown from bfd/elf-bfd.hMatthieu Longo1-8/+8
2025-03-04clean-up: fix annoying spaces in binutils/readelf.cMatthieu Longo1-27/+27
2025-02-28readelf, objdump: fix ctf dict leakNick Alcock1-1/+4
ctf_archive_next returns an opened dict, which must be closed by the caller. Thanks to Alan Modra for spotting this. binutils/ * objdump.c (dump_ctf): Close dict. * readelf.c (dump_section_as_ctf): Likewise.
2025-01-16Have readelf sanitize the program interpreter string before displaying it.Nick Clifton1-41/+68
2025-01-14elf: Add GNU_PROPERTY_MEMORY_SEAL gnu propertyAdhemerval Zanella1-0/+6
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
2025-01-14ld: Add LTO and none-LTO output support for ld -rH.J. Lu1-0/+1
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>
2025-01-01readelf memory leaksAlan Modra1-11/+21
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.
2025-01-01Update year range in copyright notice of binutils filesAlan Modra1-1/+1
2024-12-02aarch64: GCS feature check in GNU note properties for input objectsSrinath Parvathaneni1-0/+4
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>
2024-10-24Replace uses of asprintf with xasprintfAlan Modra1-13/+6
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.
2024-07-26Fix "Untranslated plural in readelf.c"Nick Clifton1-9/+10
PR 32002
2024-05-29readelf: Use section names for displaying RELR relocsSzabolcs Nagy1-8/+24
In some cases using section names instead of symbol names for displaying an address is more useful. If the symbol falls outside the section where the address is then likely it is not useful to display the address relative to. And if symbols are stripped from a binary then printing the section that contains the address is more useful than printing <no sym>.
2024-05-29readelf: Fix symbol display for RELR relocsSzabolcs Nagy1-17/+125
Filter symbols before binary searching for the right symbol to display for a given address, such that only displayable symbols are present and at most one per address. The current logic does not handle multiple symbols for the same address well if some of them are empty, the selected symbol is not stable with respect to an unrelated symbol table change and on aarch64 often mapping symbols are displayed which is not useful. Filtering solves these problems at the cost of a linear scan of the sorted symbol table. The heuristic to select the best symbol likely could be improved, this patch aims to improve symbol display for RELR without complex logic such that the output is useful and stable for ld tests.
2024-05-28Add new ELF section and segment types to readelf.Nick Clifton1-234/+383
2024-05-20readelf: add pretty printing for FDO Dlopen Metadata noteLuca Boccassi1-0/+7
2024-05-14arm: binutils: drop Maverick support.Richard Earnshaw1-4/+0
Remove the decoding of the Maverick flag from readelf.
2024-04-24Update readelf's display of RELR sections to include the number of locations ↵Nick Clifton1-20/+115
relocated
2024-04-16Simplify readelf's RELR relocation display.Fangrui Song1-17/+3
2024-04-11Improve readelf's display of RELR relocs.Nick Clifton1-129/+285
2024-04-11Add -j/--display-section option to readelf.Nick Clifton1-133/+238
2024-03-25bfd: make _bfd_section_size_insane part of the public APIAndrew Burgess1-1/+1
If a BFD user is making use of a function like bfd_get_section_contents to read a section into a pre-allocated buffer, then that BFD user might also want to make use of _bfd_section_size_insane prior to allocating the buffer they intend to use in order to validate that the buffer size that plan to allocate is sane. This commit makes _bfd_section_size_insane public, by renaming it to bfd_section_size_insane. I've updated the existing uses within bfd/, I don't believe this function is used outside of bfd/ currently. One place that I plan to make use of this function is in gdb/gdb_bfd.c, in the function gdb_bfd_get_full_section_contents. This change isn't included in this commit, but will come later if/when this has been merged into bfd. There should be no change in behaviour after this commit. bfd/ * bfd-in2.h (bfd_section_size_insane): Add declaration. * compress.c (bfd_get_full_section_contents): Update for new name of _bfd_section_size_insane. (bfd_init_section_compress_status): Likewise. * dwarf2.c (read_section): Likewise. (_bfd_dwarf2_slurp_debug_info): Likewise. * libbfd.h (_bfd_section_size_insane): Remove declaration. * section.c (_bfd_section_size_insane): Rename to ... (bfd_section_size_insane): ... this. binutils/ * readelf.c (uncompress_section_contents): Update comment to account for new name of _bfd_section_size_insane.
2024-03-19Remove redunant test of ELF size in core note decoder.Nick Clifton1-7/+0
PR 31469
2024-02-12Add support to readelf for the PT_OPENBSD_SYSCALLS segment type.Frederic Cambus1-0/+1
binutils * readelf.c (get_segment_type): Handle PT_OPENBSD_SYSCALLS segment type. include * elf/common.h (PT_OPENBSD_SYSCALLS): Define.
2024-01-19Update readelf's and objdump's debug frame displaying feature to include the ↵Nick Clifton1-0/+2
contents of the .eh_frame_hdr section, if present.
2024-01-04Update year range in copyright notice of binutils filesAlan Modra1-1/+1
Adds two new external authors to etc/update-copyright.py to cover bfd/ax_tls.m4, and adds gprofng to dirs handled automatically, then updates copyright messages as follows: 1) Update cgen/utils.scm emitted copyrights. 2) Run "etc/update-copyright.py --this-year" with an extra external author I haven't committed, 'Kalray SA.', to cover gas testsuite files (which should have their copyright message removed). 3) Build with --enable-maintainer-mode --enable-cgen-maint=yes. 4) Check out */po/*.pot which we don't update frequently.
2023-12-28x86: Add NT_X86_SHSTK noteSchimpe, Christina1-0/+2
Define NT_X86_SHSTK which is the note for x86 Shadow Stack (SHSTK) to support Intel SHSTK in Linux kernel. For now only userspace shadow stack and kernel IBT are supported by the linux kernel. This note should be used instead of NT_X86_CET introduced in the commit "x86: Add NT_X86_CET note", as it is outdated and only used by old binutils versions.
2023-11-14Improve objdump's handling of compressed sections.Nick Clifton1-146/+84
PR 31062 * objdump.c (decompressed_dumps): New local variable. (usage): Mention the -z/--decompress option. (long_options): Add --decompress. (dump_section_header): Add "COMPRESSED" to the Flags field of any compressed section. (dump_section): Warn users when dumping a compressed section. (display_any_bfd): Decompress the section if decompressed_dumps is true. (main): Handle the -z/--decompress option. * NEWS: Mention the new feature. * doc/binutils.texi: Document the new feature. * testsuite/binutils-all/objdump.s: Update expected output. * testsuite/binutils-all/objdump.exp: Add test of -Z -s. * testsuite/binutils-all/objdump.Zs: New file. * readelf.c (maybe_expand_or_relocate_section): New function. Contains common code found in dump functions. Adds a note message if a compressed section is not being decompressed. (dump_section_as_strings): Use new function. (dump_section_as_bytes): Likewise.
2023-11-10bfd, binutils: add gfx11 amdgpu architecturesSimon Marchi1-0/+3
Teach bfd and readelf about some recent gfx11 architectures. This code is taken from the rocgdb 5.7.x branch [1]. [1] https://github.com/rocm-Developer-Tools/rocgdb/tree/rocm-5.7.x bfd/ChangeLog: * archures.c (bfd_mach_amdgcn_gfx1100, bfd_mach_amdgcn_gfx1101, bfd_mach_amdgcn_gfx1102): New. * bfd-in2.h (bfd_mach_amdgcn_gfx1100, bfd_mach_amdgcn_gfx1101, bfd_mach_amdgcn_gfx1102): New. * cpu-amdgcn.c (arch_info_struct): Add entries for bfd_mach_amdgcn_gfx1100, bfd_mach_amdgcn_gfx1101, bfd_mach_amdgcn_gfx1102. binutils/ChangeLog: * readelf.c (decode_AMDGPU_machine_flags): Handle gfx1100, gfx1101, gfx1102. include/ChangeLog: * elf/amdgpu.h (EF_AMDGPU_MACH_AMDGCN_GFX1100, EF_AMDGPU_MACH_AMDGCN_GFX1101, EF_AMDGPU_MACH_AMDGCN_GFX1102): New. Change-Id: I95a8a62942e359781a1c9fa2079950fbcf2a78b8 Co-Authored-By: Laurent Morichetti <laurent.morichetti@amd.com> Cc: Lancelot Six <lancelot.six@amd.com>
2023-11-10MIPS: Change all E_MIPS_* to EF_MIPS_*Ying Huang1-38/+38
2023-10-20bfd: microblaze: Add 32_NONE reloc typeNeal Frager1-0/+4
This patch adds the R_MICROBLAZE_32_NONE relocation type. This is a 32-bit reloc that stores the 32-bit pc relative value in two words (with an imm instruction). Add test case to gas test suite. Signed-off-by: Neal Frager <neal.frager@amd.com> Signed-off-by: Michael J. Eager <eager@eagercon.com>
2023-10-07Revert "opcodes: microblaze: Add new bit-field instructions"Michael J. Eager1-4/+0
This reverts commit 6bbf249557ba17cfebe01c67370df4da9e6a56f9. Maciej W. Rozycki <macro@orcam.me.uk>: Yet it has caused numerous regressions: microblaze-elf +FAIL: unordered .debug_info references to .debug_ranges microblaze-elf +FAIL: binutils-all/pr26548 microblaze-elf +FAIL: readelf -Wwi pr26548e (reason: unexpected output) microblaze-elf +FAIL: readelf --debug-dump=loc locview-1 (reason: unexpected output) Yet it has caused numerous regressions: microblaze-elf +FAIL: unordered .debug_info references to .debug_ranges microblaze-elf +FAIL: binutils-all/pr26548 microblaze-elf +FAIL: readelf -Wwi pr26548e (reason: unexpected output) ...
2023-10-06opcodes: microblaze: Add new bit-field instructionsNeal Frager1-0/+4
This patches adds new bsefi and bsifi instructions. BSEFI- The instruction shall extract a bit field from a register and place it right-adjusted in the destination register. The other bits in the destination register shall be set to zero. BSIFI- The instruction shall insert a right-adjusted bit field from a register at another position in the destination register. The rest of the bits in the destination register shall be unchanged. Further documentation of these instructions can be found here: https://docs.xilinx.com/v/u/en-US/ug984-vivado-microblaze-ref This patch has been tested for years of AMD Xilinx Yocto releases as part of the following patch set: https://github.com/Xilinx/meta-xilinx/tree/master/meta-microblaze/recipes-devtools/binutils/binutils Signed-off-by: nagaraju <nagaraju.mekala@amd.com> Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@amd.com> Signed-off-by: Neal Frager <neal.frager@amd.com> Signed-off-by: Michael J. Eager <eager@eagercon.com>
2023-09-29x86-64: Add -z mark-plt and -z nomark-pltH.J. Lu1-0/+19
The PLT entry in executables and shared libraries contains an indirect branch, like jmp *foo@GOTPCREL(%rip) push $index_foo jmp .PLT0 or endbr64 jmp *foo@GOTPCREL(%rip) NOP padding which is used to branch to the function, foo, defined in another object. Each R_X86_64_JUMP_SLOT relocation has a corresponding PLT entry. The dynamic tags have been added to the x86-64 psABI to mark such PLT entries: https://gitlab.com/x86-psABIs/x86-64-ABI/-/commit/6d824a52a42d173eb838b879616c1be5870b593e Add an x86-64 linker option, -z mark-plt, to mark PLT entries with #define DT_X86_64_PLT (DT_LOPROC + 0) #define DT_X86_64_PLTSZ (DT_LOPROC + 1) #define DT_X86_64_PLTENT (DT_LOPROC + 3) 1. DT_X86_64_PLT: The address of the procedure linkage table. 2. DT_X86_64_PLTSZ: The total size, in bytes, of the procedure linkage table. 3. DT_X86_64_PLTENT: The size, in bytes, of a procedure linkage table entry. and set the r_addend field of the R_X86_64_JUMP_SLOT relocation to the memory offset of the indirect branch instruction. The dynamic linker can use these tags to update the PLT section to direct branch. bfd/ * elf-linker-x86.h (elf_linker_x86_params): Add mark_plt. * elf64-x86-64.c (elf_x86_64_finish_dynamic_symbol): Set the r_addend of R_X86_64_JUMP_SLOT to the indirect branch offset in PLT entry for -z mark-plt. * elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Add DT_X86_64_PLT, DT_X86_64_PLTSZ and DT_X86_64_PLTENT for -z mark-plt. (_bfd_x86_elf_finish_dynamic_sections): Set DT_X86_64_PLT, DT_X86_64_PLTSZ and DT_X86_64_PLTENT. (_bfd_x86_elf_get_synthetic_symtab): Ignore addend for JUMP_SLOT relocation. (_bfd_x86_elf_link_setup_gnu_properties): Set plt_indirect_branch_offset. * elfxx-x86.h (elf_x86_plt_layout): Add plt_indirect_branch_offset. binutils/ * readelf.c (get_x86_64_dynamic_type): New function. (get_dynamic_type): Call get_x86_64_dynamic_type. include/ * elf/x86-64.h (DT_X86_64_PLT): New. (DT_X86_64_PLTSZ): Likewise. (DT_X86_64_PLTENT): Likewise. ld/ * ld.texi: Document -z mark-plt and -z nomark-plt. * emulparams/elf32_x86_64.sh: Source x86-64-plt.sh. * emulparams/elf_x86_64.sh: Likewise. * emulparams/x86-64-plt.sh: New file. * testsuite/ld-x86-64/mark-plt-1.s: Likewise. * testsuite/ld-x86-64/mark-plt-1a-x32.d: Likewise. * testsuite/ld-x86-64/mark-plt-1a.d: Likewise. * testsuite/ld-x86-64/mark-plt-1b-x32.d: Likewise. * testsuite/ld-x86-64/mark-plt-1b.d: Likewise. * testsuite/ld-x86-64/mark-plt-1c-x32.d: Likewise. * testsuite/ld-x86-64/mark-plt-1c.d: Likewise. * testsuite/ld-x86-64/mark-plt-1d-x32.d: Likewise. * testsuite/ld-x86-64/mark-plt-1d.d: Likewise. * testsuite/ld-x86-64/x86-64.exp: Run -z mark-plt tests.
2023-09-28Add support to readelf for the PT_OPENBSD_NOBTCFI segment type.Frederic Cambus1-0/+1
2023-09-20readelf.c 'ext' may be used uninitializedAlan Modra1-1/+1
* readelf.c (display_lto_symtab): Init ext.
2023-09-05readelf: Add option to display the names of sections referenced by symbols.Nick Clifton1-195/+320
PR 30684 * readelf.c (extra_sym_info): New variable. (section_name_valid): Also check for filedata being NULL. (section_name_print): Delete. (section_index_real): New function. Returns true if the given section index references a real section. (print_symbol): Rename to print_sumbol_name. (printable_section_name): Use a rotating array of static buffers for the return string. (printable_section_name_from_index): Merge code from dump_relocations and get_symbol_index_type into here. (long_option_values): Add OPTION_NO_EXTRA_SYM_INFO. (options): Add "extra-sym-info" and "no-extra-sym-info". (usage): Mention new options. (parse_args): Parse new options. (get_symbol_index_type): Delete. (print_dynamic_symbol_size): Rename to print_symbol_size. (print_dynamic_symbol): Rename to print_symbol. (print_symbol_table_heading): New function. (process_symbol_table): Use new function. * doc/binutils.texi: Document the new option. * NEWS: Mention the new feature.
2023-08-29readelf: typos in user messagesNicolas Boulenguez1-2/+2
2023-08-21aarch64/sme2: Teach binutils/BFD about the NT_ARM_ZT register setLuis Machado1-0/+2
The Scalable Matrix Extension v2 (SME2) defines a new register, ZT0, that the Linux Kernel handles through a new NT_ARM_ZT register set. Teach binutils/BFD about it so that gdb can make use of it for reading and writing core files. This also enables readelf/objdump to show the correct identification for the NT_ARM_ZT register set. Validated under Fast Models.
2023-08-16kvx: New port.Paul Iannetta1-0/+26
2023-08-03readelf sprintf optimisationAlan Modra1-721/+1050
This replaces sprintf and strcat calls with stpcpy, and makes use of sprintf return value rather than using strlen, for get_machine_flags. decode_NDS32_machine_flags made use of snprintf, which is arguably the "correct" way to do things if there can be a buffer overflow. In this case I don't think there can be, the buffer is 1k in size which is at least 5 times more than needed. What's more, snprintf returns the count of chars that would be output given no buffer limit, which means code like r += snprintf (buf + r, size - r, ...); r += snprintf (buf + r, size - r, ...); is just wrong. There needs to be a check on the return value in order to prevent buf + r being out of bounds for the second snprintf call. BTW, if you look closely you'll see the return value of the decode functions is unused. I admit to getting a little carried away with writing "out = stpcpy (out, ...):" in each of the decode functions and didn't notice that until get_machine_flags was trimmed down to a much smaller size. When I did notice, I decided it's not such a bad thing. * readelf.c (decode_ARC_machine_flags, decode_ARM_machine_flags), (decode_AVR_machine_flags, decode_NDS32_machine_flags), (decode_AMDGPU_machine_flags): Use stpcpy and sprintf return value. Return end of string. (decode_BLACKFIN_machine_flags, decode_FRV_machine_flags), (decode_IA64_machine_flags, decode_LOONGARCH_machine_flags), (decode_M68K_machine_flags, decode_MeP_machine_flags), (decode_MIPS_machine_flags, decode_MSP430_machine_flags), (decode_PARISC_machine_flags, decode_RISCV_machine_flags), (decode_RL78_machine_flags, decode_RX_machine_flags), (decode_SH_machine_flags, decode_SPARC_machine_flags), (decode_V800_machine_flags, decode_V850_machine_flags), (decode_Z80_machine_flags): New functions, split out from.. (get_machine_flags): ..here. Similarly use stpcpy.
2023-08-02Revert "2.41 Release sources"Sam James1-2/+34
This reverts commit 675b9d612cc59446e84e2c6d89b45500cb603a8d. See https://sourceware.org/pipermail/binutils/2023-August/128761.html.
2023-08-022.41 Release sourcesbinutils-2_41-releaseNick Clifton1-34/+2
2023-07-30bpf: include, bfd, opcodes: add EF_BPF_CPUVER ELF header flagsJose E. Marchesi1-0/+6
This patch adds support for EF_BPF_CPUVER bits in the ELF machine-dependent header flags. These bits encode the BPF CPU version for which the object file has been compiled for. The BPF assembler is updated so it annotates the object files it generates with these bits. The BPF disassembler is updated so it honors EF_BPF_CPUVER to use the appropriate ISA version if the user didn't specify an explicit ISA version in the command line. Note that a value of zero in EF_BPF_CPUVER is interpreted by the disassembler as "use the later supported version" (the BPF CPU versions start with v1.) The readelf utility is updated to pretty print EF_BPF_CPUVER when it prints out the ELF header: $ readelf -h a.out ELF Header: ... Flags: 0x4, CPU Version: 4 Tested in bpf-unknown-none. include/ChangeLog: 2023-07-30 Jose E. Marchesi <jose.marchesi@oracle.com> * elf/bpf.h (EF_BPF_CPUVER): Define. * opcode/bpf.h (BPF_XBPF): Change from 0xf to 0xff so it fits in EF_BPF_CPUVER. binutils/ChangeLog: 2023-07-30 Jose E. Marchesi <jose.marchesi@oracle.com> * readelf.c (get_machine_flags): Recognize and pretty print BPF machine flags. opcodes/ChangeLog: 2023-07-30 Jose E. Marchesi <jose.marchesi@oracle.com> * bpf-dis.c: Initialize asm_bpf_version to -1. (print_insn_bpf): Set BPF ISA version from the cpu version ELF header flags if no explicit version set in the command line. * disassemble.c (disassemble_init_for_target): Remove unused code. gas/ChangeLog: 2023-07-30 Jose E. Marchesi <jose.marchesi@oracle.com> * config/tc-bpf.h (elf_tc_final_processing): Define. * config/tc-bpf.c (bpf_elf_final_processing): New function.
2023-07-07arc: Update/Add ARCv3 support.Claudiu Zissulescu1-2/+28
The ARC HS5x and ARC HS6x processors are based on the new ARCv3 ISA that implements a full range of 32-bit and 64-bit instructions. These processors feature a high-speed 10-stage, dual-issue pipeline that offers increased utilization of functional units with a limited increase in power and area. The HS5x processors feature a 32-bit pipeline that can execute all ARCv3 32-bit instructions, while the HS6x processors feature a full 64-bit pipeline and register file that can execute both 32-bit and 64-bit instructions. In addition, the ARC HS6x supports 64-bit virtual and 52-bit physical address spaces to enable direct addressing of current and future large memories, as well as 128-bit loads and stores for efficient data movement. This readelf patch updates/adds Synopsys ARCv3 machine name fileds and supported relocations. Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>
2023-06-15Add MIPS Allegrex CPU as a MIPS2-based CPUDavid Guillen Fandos1-0/+1
The Allegrex CPU was created by Sony Interactive Entertainment to power their portable console, the PlayStation Portable. The pspdev organization maintains all sorts of tools to create software for said device including documentation. Signed-off-by: David Guillen Fandos <david@davidgf.net>
2023-06-06Re: loongarch readelf supportAlan Modra1-1/+1
Commit 89c70cd358b8 apparently results in a bogus "value may be used uninitialized" warning with some combination of compiler and optimisation options. * readelf.c (target_specific_reloc_handling): Init value.
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