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2024-06-27Rewrite SHT_GROUP handlingAlan Modra1-7/+0
This patch delays setting up elf_next_in_group, elf_sec_group and elf_group_name when reading ELF object files until after all ELF sections have been processed by bfd_section_from_shdr. This is simpler and more robust than the current scheme of driving the whole process on detecting a section with SHF_GROUP set. * elf-bfd.h (struct elf_obj_tdata): Delete group_sect_ptr, num_group and group_search_offset. * elf.c (Elf_Internal_Group): Delete. (setup_group): Delete function. (IS_VALID_GROUP_SECTION_HEADER): Delete macro. (is_valid_group_section_header), (process_sht_group_entries): New functions. (_bfd_elf_setup_sections): Handle group sections here.. (_bfd_elf_make_section_from_shdr): ..rather than here. (bfd_section_from_shdr): Don't check SHT_GROUP validity here.
2024-06-04LoongArch: Make align symbol be in same section with alignment directivemengqinggang1-4/+0
R_LARCH_ALIGN (psABI v2.30) requires a symbol index. The symbol is only created at the first time to handle alignment directive. This means that all other sections may use this symbol. If the section of this symbol is discarded, there may be problems. Search it in its own section. Remove elf_backend_data.is_rela_normal() function added at commit daeda14191c. Co-authored-by: Jinyang He <hejinyang@loongson.cn> Reported-by: WANG Xuerui <git@xen0n.name> Link: https://lore.kernel.org/loongarch/2abbb633-a10e-71cc-a5e1-4d9e39074066@loongson.cn/T/#t
2024-05-08Fix RELOC_FOR_GLOBAL_SYMBOLS macro so that it can cope with user defined ↵Nick Clifton1-2/+8
symbols that start with __wrap_. PR 31710
2024-04-18elf: Strip unreferenced weak undefined symbolsH.J. Lu1-0/+2
Linker will resolve an undefined symbol only if it is referenced by relocation. Unreferenced weak undefined symbols serve no purpose. Weak undefined symbols appear in the dynamic symbol table only when they are referenced by dynamic relocation. Mark symbols with relocation and strip undefined weak symbols if they don't have relocation and aren't in the dynamic symbol table. bfd/ PR ld/31652 * elf-bfd.h (elf_link_hash_entry): Add has_reloc. * elf-vxworks.c (elf_vxworks_emit_relocs): Set has_reloc. * elflink.c (_bfd_elf_link_output_relocs): Likewise. (elf_link_output_extsym): Strip undefined weak symbols if they don't have relocation and aren't in the dynamic symbol table. ld/ PR ld/31652 * testsuite/ld-elf/elf.exp: Run undefweak tests. * testsuite/ld-elf/undefweak-1.rd: New file. * testsuite/ld-elf/undefweak-1a.s: Likewise. * testsuite/ld-elf/undefweak-1b.s: Likewise. * testsuite/ld-x86-64/weakundef-1.nd: Likewise. * testsuite/ld-x86-64/weakundef-1a.s: Likewise. * testsuite/ld-x86-64/weakundef-1b.s: Likewise. * testsuite/ld-x86-64/x86-64.exp: Run undefweak tests.
2024-04-10elf: Fix a memory leak in _bfd_elf_add_dynamic_entryH.J. Lu1-0/+1
Normally, the section contents is allocated by bfd_alloc which is freed when the object is closed. But the .dynamic section contents is allocated by bfd_realloc, which should be freed by calling free. Add a dynamic field to elf_link_hash_table for the .dynamic section and free its contents in _bfd_elf_link_hash_table_free. * elf-bfd.h (elf_link_hash_table): Add dynamic. * elflink.c (_bfd_elf_link_create_dynamic_sections): Set the dynamic field in elf_link_hash_table. (_bfd_elf_add_dynamic_entry): Use hash_table->dynamic. (_bfd_elf_strip_zero_sized_dynamic_sections): Likewise. (bfd_elf_add_dt_needed_tag): Likewise. (elf_finalize_dynstr): Likewise. (_bfd_elf_link_hash_table_free): Free htab->dynamic->contents. (bfd_elf_final_link): Use htab->dynamic. * elfxx-x86.c (_bfd_x86_elf_finish_dynamic_sections): Use htab->elf.dynamic.
2024-04-05elf: Use elf_link_first_hash_entry for first_hashH.J. Lu1-1/+1
Add elf_link_first_hash_entry and use it for first_hash. Free first_hash before freeing the main hash table. PR ld/31482 PR ld/31489 * elf-bfd.h (elf_link_hash_table): Change first_hash to bfd_hash_table. * elflink.c (elf_link_first_hash_entry): New. (elf_link_first_hash_newfunc): Likewise. (elf_link_add_to_first_hash): Updated. (elf_link_add_object_symbols): Initialize first_hash with elf_link_first_hash_newfunc. (elf_link_add_object_symbols): Updated. (elf_link_add_archive_symbols): Likewise. (_bfd_elf_link_hash_table_free): Free first_hash before freeing the main hash table.
2024-04-05elf: Always honor the first definition in shared object and archiveH.J. Lu1-0/+4
GCC doesn't put builtin function symbol references, which are defined in the shared C library, in the IR symbol table. When linker rescans shared objects and archives for newly added symbol references generated from the IR inputs, it skips definitions of the builtin functions in shared objects and archives. Add first_hash to elf_link_hash_table to track unreferenced definitions defined first in shared objects and archives. Always use them to resolve any references. bfd/ PR ld/31482 PR ld/31489 * elf-bfd.h (elf_link_hash_table): Add first_hash. * elflink.c (elf_link_add_to_first_hash): New function. (elf_link_add_object_symbols): Initialize first_hash for an IR input. Always use the first definition in shared object. Add the first unreferenced dynamic definition to first_hash. (_bfd_elf_archive_symbol_lookup): Add the first unreferenced definition to first_hash.. (elf_link_add_archive_symbols): Use the symbol definition in archive if symbol is defined first in this archive. (_bfd_elf_link_hash_table_free): Also free first_hash. ld/ PR ld/31482 PR ld/31489 * testsuite/ld-plugin/lto.exp: Add PR ld/31482 and PR ld/31489 tests. * testsuite/ld-elf/pr31482a-no-lto.c: New file. * testsuite/ld-elf/pr31482b-no-lto.c: Likewise. * testsuite/ld-elf/pr31482c-no-lto.c: Likewise. * testsuite/ld-elf/pr31482d-no-lto.c: Likewise. * testsuite/ld-plugin/pass1.out: Likewise. * testsuite/ld-plugin/pr31482a.c: Likewise. * testsuite/ld-plugin/pr31482b.c: Likewise. * testsuite/ld-plugin/pr31482c.c: Likewise.
2024-04-03elf: Add _bfd_elf_link_m[un]map_section_contentsH.J. Lu1-0/+4
To copy input section contents, add _bfd_elf_link_mmap_section_contents and _bfd_elf_link_munmap_section_contents to mmap in the input sections. * elf-bfd.h (_bfd_elf_link_mmap_section_contents): New. (_bfd_elf_link_munmap_section_contents): Likewise. * elf.c (elf_mmap_section_contents): New. (_bfd_elf_mmap_section_contents): Use it. (_bfd_elf_link_mmap_section_contents): New. (_bfd_elf_link_munmap_section_contents): Likewise. * elflink.c (elf_link_input_bfd): Call _bfd_elf_link_mmap_section_contents instead of bfd_get_full_section_contents. Call _bfd_elf_link_munmap_section_contents to munmap the section contents. (bfd_elf_final_link): When mmap is used, initialize max_contents_size to _bfd_minimum_mmap_size and increase it for compressed or linker created sections or sections whose rawsize != size.
2024-04-03elf: Add _bfd_elf_m[un]map_section_contentsH.J. Lu1-0/+20
Add _bfd_elf_mmap_section_contents and _bfd_elf_munmap_section_contents. A backend must opt-in to use mmap. It should replace bfd_malloc_and_get_section -> _bfd_elf_mmap_section_contents free -> _bfd_elf_munmap_section_contents on section contents. * compress.c (bfd_get_full_section_contents): Don't allocate buffer if mmapped_p is true. * elf-bfd.h (elf_backend_data): Add use_mmap. (bfd_elf_section_data): Add contents_addr and contents_size. (_bfd_elf_mmap_section_contents): New. (_bfd_elf_munmap_section_contents): Likewise. * elf-eh-frame.c (_bfd_elf_parse_eh_frame): Replace bfd_malloc_and_get_section and free with _bfd_elf_mmap_section_contents and _bfd_elf_munmap_section_contents on section contents. * elf-sframe.c (_bfd_elf_parse_sframe): Likewise. * elf.c (_bfd_elf_make_section_from_shdr): Replace bfd_malloc_and_get_section and free with _bfd_elf_mmap_section_contents and _bfd_elf_munmap_section_contents on section contents. (_bfd_elf_print_private_bfd_data): Likewise. (_bfd_elf_mmap_section_contents): New. (_bfd_elf_munmap_section_contents): Likewise. * elf32-i386.c (elf_i386_scan_relocs): Replace bfd_malloc_and_get_section and free with _bfd_elf_mmap_section_contents and _bfd_elf_munmap_section_contents on section contents. * elf64-x86-64.c (elf_x86_64_scan_relocs): Likewise. (elf_x86_64_get_synthetic_symtab): Likewise. * elfcode.h (elf_checksum_contents): Likewise. * elflink.c (elf_link_add_object_symbols): Likewise. (bfd_elf_get_bfd_needed_list): Likewise. * elfxx-target.h (elf_backend_use_mmap): New. (elfNN_bed): Add elf_backend_use_mmap. * elfxx-x86.c (elf_x86_size_or_finish_relative_reloc): Replace bfd_malloc_and_get_section and free with _bfd_elf_mmap_section_contents and _bfd_elf_munmap_section_contents on section contents. (_bfd_x86_elf_get_synthetic_symtab): Replace free with _bfd_elf_munmap_section_contents. * elfxx-x86.h (elf_backend_use_mmap): New. * libbfd.c: Include "elf-bfd.h". (_bfd_generic_get_section_contents): Call bfd_mmap_local for mmapped_p. * opncls.c (_bfd_delete_bfd): Also munmap ELF section contents. * section.c (asection): Add mmapped_p. (BFD_FAKE_SECTION): Updated. (bfd_malloc_and_get_section): Add a sanity check for not mmapped_p. * bfd-in2.h: Regenerated.
2024-04-02PR31458, FAIL: MIPS eh-frame 3 with --no-keep-memoryH.J. Lu1-2/+2
PR 31458 bfd/ * elf-bfd.h (_bfd_elf_link_read_relocs), (_bfd_elf_link_info_read_relocs): Constify section. * elflink.c: Likewise. * elfxx-mips.c (_bfd_mips_elf_eh_frame_address_size): Read relocs again in case --no-keep-memory. ld/ * testsuite/ld-mips-elf/mips-elf.exp: Run --no-keep-memory version of eh-frame3 test.
2024-04-02PR 30569, always call elf_backend_size_dynamic_sectionsAlan Modra1-18/+17
This largely mechanical patch is preparation for a followup patch. For quite some time I've thought that it would be useful to call elf_backend_size_dynamic_sections even when no dynamic objects are seen by the linker. That's what this patch does, with some renaming. There are no functional changes to the linker, just a move of the dynobj test in bfd_elf_size_dynamic_sections to target backend functions, replacing the asserts/aborts already there. No doubt some of the current always_size_sections functions could be moved to size_dynamic_sections but I haven't made that change. Because both hooks are now always called, I have renamed always_size_sections to early_size_sections and size_dynamic_sections to late_size_sections. I condisdered calling late_size_sections plain size_sections, since this is the usual target dynamic section sizing hook, but decided that searching the sources for "size_sections" would then hit early_size_sections and other functions.
2024-03-31BFD: Fix the bug of R_LARCH_AGLIN caused by discard sectionmengqinggang1-0/+4
To represent the first and third expression of .align, R_LARCH_ALIGN need to associate with a symbol. We define a local symbol for R_LARCH_AGLIN. But if the section of the local symbol is discarded, it may result in a undefined symbol error. Instead, we use the section name symbols, and this does not need to add extra symbols. During partial linking (ld -r), if the symbol associated with a relocation is STT_SECTION type, the addend of relocation needs to add the section output offset. We prevent it for R_LARCH_ALIGN. The elf_backend_data.rela_normal only can set all relocations of a target to rela_normal. Add a new function is_rela_normal to elf_backend_data, it can set part of relocations to rela_normal.
2024-03-08bfd: Don't hard-code BFD_JUMP_TABLE_COPYH.J. Lu1-2/+0
In BFD_JUMP_TABLE_COPY, replace _bfd_generic_init_private_section_data with NAME##_init_private_section_data so that ELF targets can properly replace it with _bfd_elf_init_private_section_data. * aout-target.h (MY_init_private_section_data): New. * coff-rs6000.c (_bfd_xcoff_init_private_section_data): New. * coffcode.h (coff_init_private_section_data): New. * elfxx-target.h (bfd_elfNN_init_private_section_data): New. * libecoff.h (_bfd_ecoff_init_private_section_data): New. * mach-o-target.c (bfd_mach_o_init_private_section_data): New. * mmo.c (mmo_init_private_section_data): New. * plugin.c (bfd_plugin_init_private_section_data): New. * ppcboot.c (ppcboot_init_private_section_data): New. * som.c (som_init_private_section_data): New. * targets.c (BFD_JUMP_TABLE_COPY): Replace _bfd_generic_init_private_section_data with NAME##_init_private_section_data. * vms-alpha.c (vms_init_private_section_data): New. * elf-bfd.h (_bfd_generic_init_private_section_data): Removed. * bfd-in2.h: Regenerated.
2024-01-09elf: Add elf_backend_add_glibc_version_dependencyH.J. Lu1-0/+23
When -z mark-plt is used to add DT_X86_64_PLT, DT_X86_64_PLTSZ and DT_X86_64_PLTENT, the r_addend field of the R_X86_64_JUMP_SLOT relocation stores the offset of the indirect branch instruction. However, glibc versions which don't have this commit in glibc 2.36: commit f8587a61892cbafd98ce599131bf4f103466f084 Author: H.J. Lu <hjl.tools@gmail.com> Date: Fri May 20 19:21:48 2022 -0700 x86-64: Ignore r_addend for R_X86_64_GLOB_DAT/R_X86_64_JUMP_SLOT According to x86-64 psABI, r_addend should be ignored for R_X86_64_GLOB_DAT and R_X86_64_JUMP_SLOT. Since linkers always set their r_addends to 0, we can ignore their r_addends. Reviewed-by: Fangrui Song <maskray@google.com> won't ignore the r_addend value in the R_X86_64_JUMP_SLOT relocation. Although this commit has been backported to glibc 2.33/2.34/2.35 release branches, it is safer to require glibc 2.36 for such binaries. Extend the glibc version dependency of GLIBC_ABI_DT_RELR for DT_RELR to also add GLIBC_2.36 version dependency for -z mark-plt on the shared C library if it provides a GLIBC_2.XX symbol version. * elflink.c (elf_find_verdep_info): Moved to ... * elf-bfd.h (elf_find_verdep_info): Here. (elf_backend_data): Add elf_backend_add_glibc_version_dependency. (_bfd_elf_link_add_glibc_version_dependency): New function. (_bfd_elf_link_add_dt_relr_dependency): Likewise. * elf64-x86-64.c (elf_x86_64_add_glibc_version_dependency): Likewise. (elf_backend_add_glibc_version_dependency): New. * elflink.c (elf_link_add_dt_relr_dependency): Renamed to ... (elf_link_add_glibc_verneed): This. Modified to support other glibc dependencies. (_bfd_elf_link_add_glibc_version_dependency): Likewise. (_bfd_elf_link_add_dt_relr_dependency): Likewise. (bfd_elf_size_dynamic_sections): Call elf_backend_add_glibc_version_dependency instead of elf_link_add_dt_relr_dependency. * elfxx-target.h (elf_backend_add_glibc_version_dependency): New. (elfNN_bed): Add elf_backend_add_glibc_version_dependency. ld/ * testsuite/ld-x86-64/mark-plt-1a.rd: New file. * testsuite/ld-x86-64/mark-plt-1b.rd: Likewise. * testsuite/ld-x86-64/x86-64.exp: Run -z mark-plt test for GLIBC_2.36 dependency.
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.
2023-09-28Fix: nm: SEGV on unknow address at nm.c:718 in print_symnameNick Clifton1-1/+2
PR 30886 * elf-bfd.h (struct elf_obj_tdata): Add dt_strsz field. * elf.c (_bfd_elf_get_dynamic_symbols): Add a NUL byte at the end of the string table. Initialise the dt_strsz field. (_bfd_elf_slurp_version_tables): Only free the contents if they were malloc'ed. Add checks before setting string pointers in the dt_strtab buffer.
2023-09-20elf-attrs.c memory allocation failAlan Modra1-4/+6
Report errors rather than segfaulting. bfd/ * elf-attrs.c (elf_new_obj_attr): Return NULL on bfd_alloc fail. (bfd_elf_add_obj_attr_int): Handle NULL return from the above, and propagate return to callers. (elf_add_obj_attr_string, elf_add_obj_attr_int_string): Likewise. (bfd_elf_add_obj_attr_string): Similarly. (_bfd_elf_copy_obj_attributes): Report error on alloc fails. (_bfd_elf_parse_attributes): Likewise. * elf-bfd.h (bfd_elf_add_obj_attr_int): Update prototype. (bfd_elf_add_obj_attr_string): Likewise. (bfd_elf_add_obj_attr_int_string): Likewise. gas/ * config/obj-elf.c (obj_elf_vendor_attribute): Report fatal error on out of memory from bfd attribute functions. * config/tc-arc.c (arc_set_attribute_int): Likewise. (arc_set_attribute_string, arc_set_public_attributes): Likewise. * config/tc-arm.c (aeabi_set_attribute_int): Likewise. (aeabi_set_attribute_string): Likewise. * config/tc-mips.c (mips_md_finish): Likewise. * config/tc-msp430.c (msp430_md_finish): Likewise. * config/tc-riscv.c (riscv_write_out_attrs): Likewise. * config/tc-sparc.c (sparc_md_finish): Likewise. * config/tc-tic6x.c (tic6x_set_attribute_int): Likewise. * config/tc-csky.c (md_begin): Likewise. (set_csky_attribute): Return ok status.
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.
2023-08-21aarch64/sme: Core file supportEzra Sitorus1-0/+4
Add required code to support core file dumps with NT_ARM_ZA and NT_ARM_SSVE register sets in them. These new register sets are dumped when SME is supported.
2023-08-16kvx: New port.Paul Iannetta1-0/+1
2023-06-29bfd: Improve nm and objdump without section headerH.J. Lu1-0/+15
When there is no section header in an executable or shared library, we reconstruct dynamic symbol table from the PT_DYNAMIC segment, which contains DT_HASH/DT_GNU_HASH/DT_MIPS_XHASH, DT_STRTAB, DT_SYMTAB, DT_STRSZ, and DT_SYMENT entries, to improve nm and objdump. For DT_HASH, the number of dynamic symbol table entries equals the number of chains. For DT_GNU_HASH/DT_MIPS_XHASH, only defined symbols with non-STB_LOCAL indings are in hash table. Since DT_GNU_HASH/DT_MIPS_XHASH place all symbols with STB_LOCAL binding before symbols with other bindings and all undefined symbols defined ones in dynamic symbol table, the highest symbol index in DT_GNU_HASH/DT_MIPS_XHASH is the highest dynamic symbol table index. We can also get symbol version from DT_VERSYM, DT_VERDEF and DT_VERNEED entries. dt_symtab, dt_versym, dt_verdef, dt_verneed, dt_symtab_count, dt_verdef_count, dt_verneed_count and dt_strtab are added to elf_obj_tdata to store dynamic symbol table information. PR ld/25617 * elf-bfd.h (elf_obj_tdata): Add dt_symtab, dt_verdef, dt_verneed, dt_symtab_count, dt_verdef_count, dt_verneed_count and dt_strtab. (elf_use_dt_symtab_p): New. (_bfd_elf_get_dynamic_symbols): Likewise. (_bfd_elf_get_section_from_dynamic_symbol): Likewise. * elf.c (bfd_elf_get_elf_syms): Use dynamic symbol table if neeeded. (_bfd_elf_get_dynamic_symtab_upper_bound): Likewise. (_bfd_elf_slurp_version_tables): Likewise. (offset_from_vma): New function. (get_hash_table_data): Likewise. (_bfd_elf_get_dynamic_symbols): Likewise. (_bfd_elf_get_section_from_dynamic_symbol): Likewise. (_bfd_elf_get_symbol_version_name): Likewise. * elfcode.h (elf_object_p): Call _bfd_elf_get_dynamic_symbols to reconstruct dynamic symbol table from PT_DYNAMIC segment if there is no section header. (elf_slurp_symbol_table): Use dynamic symbol table if neeeded. Don't free isymbuf when dynamic symbol table is used. * elflink.c (elf_link_is_defined_archive_symbol): Return wrong format error when dynamic symbol table is used. (elf_link_add_object_symbols): Likewise.
2023-06-07_bfd_free_cached_infoAlan Modra1-1/+1
doc/bfdint.texi and comments in the aout and som code about this function are just wrong, and its name is not very apt. Better would be _bfd_mostly_destroy, and we certainly should not be saying anything about the possibility of later recreating anything lost by this function. What's more, if _bfd_free_cached_info is called when creating an archive map to reduce memory usage by throwing away symbols, the target _close_and_cleanup function won't have access to tdata or section bfd_user_data to tidy memory. This means most of the target _close_and_cleanup function won't do anything, and therefore sometimes will result in memory leaks. This patch fixes the documentation problems and moves most of the target _close_and_cleanup code to target _bfd_free_cached_info. Another notable change is that bfd_generic_bfd_free_cached_info is now defined as _bfd_free_cached_info rather than _bfd_bool_bfd_true, ie. the default now frees objalloc memory.
2023-03-24Tidy dwarf1 cached section contentsAlan Modra1-1/+1
* dwarf1.c (_bfd_dwarf1_cleanup_debug_info): New function. * libbfd-in.h (_bfd_dwarf1_cleanup_debug_info): Declare. * elf.c (_bfd_elf_close_and_cleanup): Call it. * elf-bfd.h (struct elf_obj_tdata): Make dwarf1_find_line_info a void*. * libbfd.h: Regenerate.
2023-02-02bfd: use "stack trace" instead of "unwind" for SFrameIndu Bhagat1-1/+1
SFrame format is meant for generating stack traces only. bfd/ * elf-bfd.h: Replace the use of "unwind" with "stack trace". * elf-sframe.c: Likewise. * elf64-x86-64.c: Likewise. * elfxx-x86.c: Likewise. include/ * elf/common.h: Likewise.
2023-01-01Update year range in copyright notice of binutils filesAlan Modra1-1/+1
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.
2022-11-15bfd: linker: merge .sframe sectionsIndu Bhagat1-0/+54
The linker merges all the input .sframe sections. When merging, the linker verifies that all the input .sframe sections have the same abi/arch. The linker uses libsframe library to perform key actions on the .sframe sections - decode, read, and create output data. This implies buildsystem changes to make and install libsframe before libbfd. The linker places the output .sframe section in a new segment of its own: PT_GNU_SFRAME. A new segment is not added, however, if the generated .sframe section is empty. When a section is discarded from the final link, the corresponding entries in the .sframe section for those functions are also deleted. The linker sorts the SFrame FDEs on start address by default and sets the SFRAME_F_FDE_SORTED flag in the .sframe section. This patch also adds support for generation of SFrame unwind information for the .plt* sections on x86_64. SFrame unwind info is generated for IBT enabled PLT, lazy/non-lazy PLT. The existing linker option --no-ld-generated-unwind-info has been adapted to include the control of whether .sframe unwind information will be generated for the linker generated sections like PLT. Changes to the linker script have been made as necessary. ChangeLog: * Makefile.def: Add install dependency on libsframe for libbfd. * Makefile.in: Regenerated. * bfd/Makefile.am: Add elf-sframe.c * bfd/Makefile.in: Regenerated. * bfd/bfd-in2.h (SEC_INFO_TYPE_SFRAME): Regenerated. * bfd/configure: Regenerate. * bfd/configure.ac: Add elf-sframe.lo. * bfd/elf-bfd.h (struct sframe_func_bfdinfo): New struct. (struct sframe_dec_info): Likewise. (struct sframe_enc_info): Likewise. (struct elf_link_hash_table): New member for encoded .sframe object. (struct output_elf_obj_tdata): New member. (elf_sframe): New access macro. (_bfd_elf_set_section_sframe): New declaration. * bfd/elf.c (get_segment_type): Handle new segment PT_GNU_SFRAME. (bfd_section_from_phdr): Likewise. (get_program_header_size): Likewise. (_bfd_elf_map_sections_to_segments): Likewise. * bfd/elf64-x86-64.c (elf_x86_64_link_setup_gnu_properties): Add contents to the .sframe sections or .plt* entries. * bfd/elflink.c (elf_section_ignore_discarded_relocs): Handle SEC_INFO_TYPE_SFRAME. (_bfd_elf_default_action_discarded): Handle .sframe section. (elf_link_input_bfd): Merge .sframe section. (bfd_elf_final_link): Write the output .sframe section. (bfd_elf_discard_info): Handle discarding .sframe section. * bfd/elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Create .sframe section for .plt and .plt.sec. (_bfd_x86_elf_finish_dynamic_sections): Handle .sframe from .plt* sections. * bfd/elfxx-x86.h (PLT_SFRAME_FDE_START_OFFSET): New definition. (SFRAME_PLT0_MAX_NUM_FRES): Likewise. (SFRAME_PLTN_MAX_NUM_FRES): Likewise. (struct elf_x86_sframe_plt): New structure. (struct elf_x86_link_hash_table): New member. (struct elf_x86_init_table): New members for .sframe creation. * bfd/section.c: Add new definition SEC_INFO_TYPE_SFRAME. * binutils/readelf.c (get_segment_type): Handle new segment PT_GNU_SFRAME. * ld/ld.texi: Update documentation for --no-ld-generated-unwind-info. * ld/scripttempl/elf.sc: Support .sframe sections. * ld/Makefile.am (TESTSFRAMELIB): Use it. (check-DEJAGNU): Likewise. * ld/Makefile.in: Regenerated. * ld/configure.ac (TESTSFRAMELIB): Set to the .so or .a like TESTBFDLIB. * ld/configure: Regenerated. * bfd/elf-sframe.c: New file. include/ChangeLog: * elf/common.h (PT_GNU_SFRAME): New definition. * elf/internal.h (struct elf_segment_map): Handle new segment type PT_GNU_SFRAME. ld/testsuite/ChangeLog: * ld/testsuite/ld-bootstrap/bootstrap.exp: Add SFRAMELIB. * ld/testsuite/ld-aarch64/aarch64-elf.exp: Add new test sframe-simple-1. * ld/testsuite/ld-aarch64/sframe-bar.s: New file. * ld/testsuite/ld-aarch64/sframe-foo.s: Likewise. * ld/testsuite/ld-aarch64/sframe-simple-1.d: Likewise. * ld/testsuite/ld-sframe/sframe-empty.d: New test. * ld/testsuite/ld-sframe/sframe-empty.s: New file. * ld/testsuite/ld-sframe/sframe.exp: New testsuite. * ld/testsuite/ld-x86-64/sframe-bar.s: New file. * ld/testsuite/ld-x86-64/sframe-foo.s: Likewise. * ld/testsuite/ld-x86-64/sframe-simple-1.d: Likewise. * ld/testsuite/ld-x86-64/sframe-plt-1.d: Likewise. * ld/testsuite/ld-x86-64/sframe-simple-1.d: Likewise. * ld/testsuite/ld-x86-64/x86-64.exp: Add new tests - sframe-simple-1, sframe-plt-1. * ld/testsuite/lib/ld-lib.exp: Add new proc to check if assembler supports SFrame section. * ld/testsuite/ld-sframe/discard.d: New file. * ld/testsuite/ld-sframe/discard.ld: Likewise. * ld/testsuite/ld-sframe/discard.s: Likewise.
2022-11-04Support multiple .eh_frame sectionsJojo R1-0/+3
This patch is based on MULTIPLE_FRAME_SECTIONS and EH_FRAME_LINKONCE, it allows backend to enable this feature and use '--gc-sections' simply. * gas/dw2gencfi.h (TARGET_MULTIPLE_EH_FRAME_SECTIONS): New. (MULTIPLE_FRAME_SECTIONS): Add TARGET_MULTIPLE_EH_FRAME_SECTIONS. * gas/dw2gencfi.c (EH_FRAME_LINKONCE): Add TARGET_MULTIPLE_EH_FRAME_SECTIONS. (is_now_linkonce_segment): Likewise. (get_cfi_seg): Create relocation info between .eh_frame.* and .text.* section. * bfd/elf-bfd.h (elf_backend_can_make_multiple_eh_frame): New. * bfd/elfxx-target.h (elf_backend_can_make_multiple_eh_frame): Likewise. * bfd/elflink.c (_bfd_elf_default_action_discarded): Add checking for elf_backend_can_make_multiple_eh_frame.
2022-09-06bfd: Add bfd_find_nearest_line_with_altAaron Merey1-0/+3
bfd_find_nearest_line_with_alt functions like bfd_find_nearest_line with the addition of a parameter for specifying the filename of a supplementary debug file such as one referenced by .gnu_debugaltlink or .debug_sup. This patch focuses on implementing bfd_find_nearest_line_with_alt support for ELF/DWARF2 .gnu_debugaltlink. For other targets this function simply sets the invalid_operation bfd_error.
2022-05-26ld: add --package-metadataLuca Boccassi1-0/+8
Generate a .note.package FDO package metadata ELF note, following the spec: https://systemd.io/ELF_PACKAGE_METADATA/ If the jansson library is available at build time (and it is explicitly enabled), link ld to it, and use it to validate that the input is correct JSON, to avoid writing garbage to the file. The configure option --enable-jansson has to be used to explicitly enable it (error out when not found). This allows bootstrappers (or others who are not interested) to seamlessly skip it without issues.
2022-04-01Use pseudosections for NT_FREEBSD_X86_SEGBASES core dump notes.John Baldwin1-0/+2
This includes adding pseudosections when reading a core dump as well as support for writing out a core dump note from a pseudosection. bfd/ChangeLog: * elf-bfd.h (elfcore_write_x86_segbases): New. * elf.c (elfcore_grok_freebsd_note): Add pseudosections for NT_FREEBSD_X86_SEGBASES register notes. (elfcore_write_x86_segbases): New. (elfcore_write_register_note): Write NT_FREEBSD_X86_SEGBASES register notes.
2022-03-16bfd: add AMDGCN architectureSimon Marchi1-0/+1
Add support for the AMDGCN architecture to BFD. This is the bare minimum to get $ ./configure --target=amdgcn-hsa-amdhsa --disable-gas $ make all-binutils working later in this series. The specific AMDGCN models added here are a bit arbitrary, based on what we intend to initially support in GDB. This list will need to be updated in the future anyway. The complete up-to-date list of existing AMDGPU models can be found here: https://llvm.org/docs/AMDGPUUsage.html#processors The ELF format for this architecture is documented here: https://llvm.org/docs/AMDGPUUsage.html#elf-code-object The flags for the "HSA" OS ABI are properly versioned and documented on that page. But the NONE, PAL and MESA3D OS ABIs are not well documented nor versioned. Taking a peek at the LLVM source code, we see that they encode their flags the same way as HSA v3. For example, for PAL: https://github.com/llvm/llvm-project/blob/c8b614cd74a92d85936aed5ac7c642af75ffdc29/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp#L601 So at least, we know that all AMDGPU objects (of which AMDGCN objects are a subset of) at the time of writing encode the specific GPU model in the EF_AMDGPU_MACH field of e_flags. bfd/ChangeLog: * Makefile.am (ALL_MACHINES, ALL_MACHINES_CFILES): Add cpu-amdgcn.c. (BFD64_BACKENDS): Add elf64-amdgcn.lo. (BFD64_BACKENDS_CFILES): Add elf64-amdgcn.c. * Makefile.in: Re-generate. * cpu-amdgcn.c: New. * elf64-amdgcn.c: New. * archures.c (bfd_architecture): Add bfd_arch_amdgcn and related mach defines. (bfd_amdgcn_arch): New. (bfd_archures_list): Add bfd_amdgcn_arch. * bfd-in2.h: Re-generate. * config.bfd: Handle amdgcn* target. * configure.ac: Handle amdgcn_elf64_le_vec. * configure: Re-generate. * elf-bfd.h (elf_target_id): Add AMDGCN_ELF_DATA. * targets.c (amdgcn_elf64_le_vec): New. (_bfd_target_vector): Add amdgcn_elf64_le_vec. include/ChangeLog: * elf/amdgpu.h: New. * elf/common.h (ELFOSABI_AMDGPU_HSA): Add. Change-Id: I969f7b14960797e88891c308749a6e341eece5b2
2022-03-09ld: Add a before_plugin_all_symbols_read hookH.J. Lu1-0/+3
Add a before_plugin_all_symbols_read hook to load symbol references from DT_NEEDED entries, included from --copy-dt-needed-entries, before reading plugin symbols to properly resolve plugin symbol references. bfd/ PR ld/28849 * elf-bfd.h (elf_link_hash_table): Add handling_dt_needed. * elflink.c (_bfd_elf_merge_symbol): Don't set non_ir_ref_dynamic before plugin 'all symbols read' hook is called. ld/ PR ld/28849 * ldelf.c (ldelf_handle_dt_needed): New function. (ldelf_before_plugin_all_symbols_read): Likewise. (ldelf_after_open): Call ldelf_handle_dt_needed. * ldelf.h (ldelf_before_plugin_all_symbols_read): New. * ldemul.c (ldemul_before_plugin_all_symbols_read): Likewise. * ldemul.h (ldemul_before_plugin_all_symbols_read): Likewise. (ld_emulation_xfer_struct): Add before_plugin_all_symbols_read. * ldlang.c (lang_process): Call ldemul_before_plugin_all_symbols_read before calling plugin_call_all_symbols_read. * emultempl/elf.em (gld${EMULATION_NAME}_before_plugin_all_symbols_read): New. (LDEMUL_BEFORE_PLUGIN_ALL_SYMBOLS_READ): New. * emultempl/emulation.em (ld_${EMULATION_NAME}_emulation): Initialize the before_plugin_all_symbols_read field. * testsuite/ld-plugin/lto.exp: Run PR ld/28849 tests. * testsuite/ld-plugin/pr28849.d: New file. * testsuite/ld-plugin/pr28849a.c: Likewise. * testsuite/ld-plugin/pr28849b.c: Likewise.
2022-02-13Remove bfd ELF_RELROPAGESIZEAlan Modra1-3/+0
Now that ld properly aligns the end of the relro segment, the hack to make relro work on powerpc can disappear. bfd/ * bfd.c (bfd_emul_get_commonpagesize): Remove relro param. Don't return bed->relropagesize. * elf-bfd.h (struct elf_backend_data): Remove relropagesize. * elfxx-target.h (ELF_RELROPAGESIZE): Remove. * elf32-ppc.c (ELF_RELROPAGESIZE): Don't define. * elf64-ppc.c: Likewise. * bfd-in2.h: Regenerate. ld/ * ldemul.c (after_parse_default): Adjust bfd_emul_get_commonpagesize call.
2022-02-05Detect .eh_frame_hdr earlier for SIZEOF_HEADERSAlan Modra1-6/+1
Current code detects the need for PT_GNU_EH_FRAME using a field set by _bfd_elf_discard_section_eh_frame_hdr, which is called fairly late in the linking process. Use the elf hash table eh_info instead, which is set up earlier by size_dynamic_sections. * elf-bfd.h (struct output_elf_obj_tdata): Delete eh_frame_hdr. (elf_eh_frame_hdr): Don't define. (_bfd_elf_discard_section_eh_frame_hdr): Update prototype. * elf-eh-frame.c (_bfd_elf_discard_section_eh_frame_hdr): Delete abfd parameter. Don't set elf_eh_frame_hdr. * elf.c (elf_eh_frame_hdr): New function. (get_program_header_size): Adjust elf_eh_frame_hdr call. (_bfd_elf_map_sections_to_segments): Likewise.
2022-01-18tweak __ehdr_start visibility and flags for check_relocsAlan Modra1-1/+4
bfd/ * elf-bfd.h (UNDEFWEAK_NO_DYNAMIC_RELOC): Test linker_def. ld/ * ldelf.c (ldelf_before_allocation): Don't force __ehdr_start local and hidden here.. * ldlang.c (lang_symbol_tweaks): ..do so here instead and set def_regular and linker_def for check_relocs. New function extracted from lang_process.
2022-01-12elf: Add size_relative_relocs and finish_relative_relocsH.J. Lu1-0/+10
On some targets, the DT_RELR section size can be computed only after all symbols addresses can be determined. Set the preliminary DT_RELR section size before mapping sections to segments and set the final DT_RELR section size after regular symbol processing is done. * elf-bfd.h (elf_backend_data): Add size_relative_relocs and finish_relative_relocs. * elf.c (_bfd_elf_map_sections_to_segments): Call size_relative_relocs if DT_RELR is enabled. * elflink.c (bfd_elf_final_link): Call finish_relative_relocs after regular symbol processing is finished if DT_RELR is enabled. * elfxx-target.h (elf_backend_size_relative_relocs): New. (elf_backend_finish_relative_relocs): Likewise. (elfNN_bed): Add elf_backend_size_relative_relocs and elf_backend_finish_relative_relocs.
2022-01-12ld: Initial DT_RELR supportH.J. Lu1-0/+1
Add a -z pack-relative-relocs option to enable DT_RELR and create a relr.dyn section for DT_RELR. DT_RELR is implemented with the linker relaxation infrastructure, but it doesn't require the --relax option enabled. -z pack-relative-relocs implies -z combreloc. -z nocombreloc implies -z nopack-relative-relocs. -z pack-relative-relocs is chosen over the similar option in lld, --pack-dyn-relocs=relr, to implement a glibc binary lockout mechanism with a special glibc version symbol, to avoid random crashes of DT_RELR binaries with the existing glibc binaries. bfd/ * elf-bfd.h (elf_link_hash_table): Add srelrdyn. * elflink.c (_bfd_elf_link_create_dynamic_sections): Create a .relr.dyn section for DT_RELR. include/ * bfdlink.h (bfd_link_info): Add enable_dt_relr. ld/ * News: Mention -z pack-relative-relocs and -z nopack-relative-relocs. * ld.texi: Document -z pack-relative-relocs and -z nopack-relative-relocs. * ldelf.c (ldelf_after_parse): Disable DT_RELR if not building PIE nor shared library. Add 3 spare dynamic tags for DT_RELR, DT_RELRSZ and DT_RELRENT. * ldlang.c (lang_relax_sections): Also enable relaxation if DT_RELR is enabled. * emulparams/elf32_x86_64.sh: Source dt-relr.sh. * emulparams/elf_i386.sh: Likewise. * emulparams/elf_x86_64.sh: Likewise. * emulparams/dt-relr.sh: New file. * scripttempl/elf.sc: Support .relr.dyn.
2022-01-12elf: Pass need_layout to _bfd_elf_map_sections_to_segmentsH.J. Lu1-1/+1
On some targets, the DT_RELR section size can be computed only after all symbols addresses can be determined. Update ldelf_map_segments to pass need_layout to _bfd_elf_map_sections_to_segments which will size DT_RELR section and set need_layout to true if the DT_RELR section size is changed. bfd/ * elf-bfd.h (_bfd_elf_map_sections_to_segments): Add a bool pointer argument. * elf.c (_bfd_elf_map_sections_to_segments): Add a bool pointer argument to indicate if section layout needs update. (assign_file_positions_for_load_sections): Pass NULL to _bfd_elf_map_sections_to_segments. * elflink.c (_bfd_elf_strip_zero_sized_dynamic_sections): Pass NULL to _bfd_elf_map_sections_to_segments. ld/ * ldelfgen.c (ldelf_map_segments): Pass &need_layout to _bfd_elf_map_sections_to_segments.
2022-01-07ld: Extract _bfd_elf_link_iterate_on_relocsH.J. Lu1-0/+4
DT_RELR encodes consecutive R_*_RELATIVE relocations in GOT (the global offset table) and data sections in a compact format: https://groups.google.com/g/generic-abi/c/bX460iggiKg On some targets, R_*_RELATIVE relocations are counted and the GOT offsets are allocated when setting the dynamic section sizes after seeing all relocations. R_*_RELATIVE relocations are generated while relocating sections after section layout has been finalized. To prepare for DT_RELR implementation on these targets, extract _bfd_elf_link_iterate_on_relocs from _bfd_elf_link_check_relocs so that a backend can scan relocations in elf_backend_always_size_sections For x86 targets, the old check_relocs is renamed to scan_relocs and a new check_relocs is added to chek input sections and create dynamic relocation sections so that they will be mapped to output sections. scan_relocs is now called from elf_backend_always_size_sections. Since relocations are scanned after __start, __stop, .startof. and .sizeof. symbols have been finalized on x86, __[start|stop]_SECNAME for --gc-sections -z start-stop-gc are now zero when all SECNAME sections been garbage collected. This is no need for elf_x86_start_stop_gc_p. bfd/ * elf-bfd.h (_bfd_elf_link_iterate_on_relocs): New. * elf32-i386.c (elf_i386_convert_load_reloc): Don't call elf_x86_start_stop_gc_p. (elf_i386_check_relocs): Renamed to ... (elf_i386_scan_relocs): This. Don't call _bfd_elf_make_dynamic_reloc_section. (elf_i386_always_size_sections): New. (elf_backend_check_relocs): Removed. (elf_backend_always_size_sections): New. * elf64-x86-64.c (elf_x86_64_convert_load_reloc): Don't call elf_x86_start_stop_gc_p. (elf_x86_64_check_relocs): Renamed to ... (elf_x86_64_scan_relocs): This. Don't call _bfd_elf_make_dynamic_reloc_section. (elf_x86_64_always_size_sections): New. (elf_backend_check_relocs): Removed. (elf_backend_always_size_sections): New. * elflink.c (elf_link_check_or_scan_relocs): New. Extracted from _bfd_elf_link_check_relocs. (_bfd_elf_link_check_relocs): Call elf_link_check_or_scan_relocs. * elfxx-x86.c (_bfd_x86_elf_check_relocs): New. * elfxx-x86.h (X86_64_NEED_DYNAMIC_RELOC_TYPE_P): New. (I386_NEED_DYNAMIC_RELOC_TYPE_P): Likewise. (X86_NEED_DYNAMIC_RELOC_TYPE_P): Likewise. (_bfd_x86_elf_check_relocs): Likewise. (elf_backend_check_relocs): Likewise. (elf_backend_always_size_sections): Removed. (elf_x86_start_stop_gc_p): Likewise. ld/ * testsuite/ld-i386/pr27491-1a.d: Updated. * testsuite/ld-x86-64/pr27491-1a.d: Likewise.
2022-01-05elf: Set p_align to the minimum page size if possibleH.J. Lu1-0/+4
Currently, on 32-bit and 64-bit ARM, it seems that ld generates p_align values of 0x10000 even if no section alignment is greater than 0x1000. The issue is more general and probably affects other targets with multiple page sizes. While file layout absolutely must take 64K page size into account, that does not have to be reflected in the p_align value. If running on a 64K kernel, the file will be loaded at a 64K page boundary by necessity. On a 4K kernel, 64K alignment is not needed. The glibc loader has been fixed to honor p_align: https://sourceware.org/bugzilla/show_bug.cgi?id=28676 similar to kernel: commit ce81bb256a224259ab686742a6284930cbe4f1fa Author: Chris Kennelly <ckennelly@google.com> Date: Thu Oct 15 20:12:32 2020 -0700 fs/binfmt_elf: use PT_LOAD p_align values for suitable start address This means that on 4K kernels, we will start to do extra work for 64K p_align, but this pointless for pretty much all binaries (whose section alignment rarely exceeds 16). The minimum page size is used, instead of the maximum section alignment due to this glibc bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28688 It has been fixed in glibc 2.35. But linker output must work on existing glibc binaries. 1. Set p_align to the minimum page size while laying out segments aligning to the maximum page size or section alignment. The run-time loader can align segments to the minimum page size or above, depending on system page size. 2. If -z max-page-size=NNN is used, p_align will be set to the maximum page size or the largest section alignment. 3. If a section requires alignment higher than the minimum page size, don't set p_align to the minimum page size. 4. If a section requires alignment higher than the maximum page size, set p_align to the section alignment. 5. For objcopy, when the minimum page size != the maximum page size, p_align may be set to the minimum page size while segments are aligned to the maximum page size. In this case, the input p_align will be ignored and the maximum page size will be used to align the ouput segments. 6. Update linker to disallow the common page size > the maximum page size. 7. Update linker to avoid the common page size > the maximum page size. 8. Adjust pru_irq_map-1.d to expect p_align == sh_addralign: Section Headers: [Nr] Name Type Addr Off Size ES Flg Lk Inf Al [ 0] NULL 00000000 000000 000000 00 0 0 0 [ 1] .text PROGBITS 20000000 00007c 000004 00 AX 0 0 4 ... Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000074 0x00000000 0x00000000 0x00008 0x00008 RW 0x1 LOAD 0x00007c 0x20000000 0x20000000 0x00004 0x00004 R E 0x4 vs. Section Headers: [Nr] Name Type Addr Off Size ES Flg Lk Inf Al [ 0] NULL 00000000 000000 000000 00 0 0 0 [ 1] .text PROGBITS 20000000 00007c 000004 00 AX 0 0 4 ... Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000074 0x00000000 0x00000000 0x00008 0x00008 RW 0x1 LOAD 0x00007c 0x20000000 0x20000000 0x00004 0x00004 R E 0x1 To enable this linker optimization, the backend should define ELF_P_ALIGN to ELF_MINPAGESIZE. bfd/ PR ld/28689 PR ld/28695 * elf-bfd.h (elf_backend_data): Add p_align. * elf.c (assign_file_positions_for_load_sections): Set p_align to the default p_align value while laying out segments aligning to maximum page size or section alignment. (elf_is_p_align_valid): New function. (copy_elf_program_header): Call elf_is_p_align_valid to determine if p_align is valid. * elfxx-target.h (ELF_P_ALIGN): New. Default to 0. (elfNN_bed): Add ELF_P_ALIGN. * elfxx-x86.h (ELF_P_ALIGN): New. Set to ELF_MINPAGESIZE. include/ PR ld/28689 PR ld/28695 * bfdlink.h (bfd_link_info): Add maxpagesize_is_set. ld/ PR ld/28689 PR ld/28695 * emultempl/elf.em (gld${EMULATION_NAME}_handle_option): Set link_info.maxpagesize_is_set for -z max-page-size=NNN. * ldelf.c (ldelf_after_parse): Disallow link_info.commonpagesize > link_info.maxpagesize. * testsuite/ld-elf/elf.exp: Pass -z max-page-size=0x4000 to linker to build mbind2a and mbind2b. * testsuite/ld-elf/header.d: Add -z common-page-size=0x100. * testsuite/ld-elf/linux-x86.exp: Add PR ld/28689 tests. * testsuite/ld-elf/p_align-1.c: New file. * testsuite/ld-elf/page-size-1.d: New test. * testsuite/ld-elf/pr26936.d: Add -z common-page-size=0x1000. * testsuite/ld-elf/seg.d: Likewise. * testsuite/ld-scripts/rgn-at5.d: Likewise. * testsuite/ld-pru/pru_irq_map-1.d: Append 1 to name. Adjust expected PT_LOAD segment alignment. * testsuite/ld-pru/pru_irq_map-2.d: Append 2 to name. * testsuite/ld-scripts/pr23571.d: Add -z max-page-size=0x1000.
2022-01-02Update year range in copyright notice of binutils filesAlan Modra1-1/+1
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.
2021-12-27elf: Update comments for check_relocs in elf_backend_dataH.J. Lu1-7/+5
Since commit 5c3261b0e834647cf9eb555320e20871b7854f98 Author: H.J. Lu <hjl.tools@gmail.com> Date: Mon Oct 16 03:49:54 2017 -0700 ELF: Call check_relocs after opening all inputs check_relocs is called after opening all inputs. * elf-bfd.h (elf_backend_data::check_relocs): Update comments.
2021-12-17asan: NULL dereference in bfd_elf_set_group_contentsAlan Modra1-1/+1
* elf-bfd.h (struct output_elf_obj_tdata): Make num_section_syms unsigned. * elf.c (bfd_elf_set_group_contents): Bounds check sec->index and check that entry in elf_section_syms for sec is non-NULL. (_bfd_elf_symbol_from_bfd_symbol): Adjust.
2021-10-24LoongArch bfd supportliuzhensong1-0/+9
2021-10-22 Chenghua Xu <xuchenghua@loongson.cn> Zhensong Liu <liuzhensong@loongson.cn> Weinan Liu <liuweinan@loongson.cn> bfd/ * Makefile.am: Add LoongArch. * archures.c: Likewise. * config.bfd: Likewise. * configure.ac: Likewise. * cpu-loongarch.c: New. * elf-bfd.h: Add LoongArch. * elf.c: Add LoongArch elfcore_grok_xxx. * elfnn-loongarch.c: New. * elfxx-loongarch.c: New. * elfxx-loongarch.h: New. * reloc.c: Add LoongArch BFD RELOC ENUM. * targets.c: Add LoongArch target. * Makefile.in: Regenerate. * bfd-in2.h: Regenerate. * configure: Regenerate. * libbfd.h: Regenerate. * po/BLD-POTFILES.in: Regenerate. * po/SRC-POTFILES.in: Regenerate. include/ * elf/common.h: Add NT_LARCH_{CPUCFG,CSR,LSX,LASX}. * elf/loongarch.h: New.
2021-10-01PATCH bfd: Fix linker warning for recently introduced arm attributesAndrea Corallo1-1/+1
2021-09-27 Andrea Corallo <andrea.corallo@arm.com> * elf-bfd.h (NUM_KNOWN_OBJ_ATTRIBUTES): Update value to cover 'Tag_BTI_use' and 'Tag_PACRET_use'.
2021-09-02SHT_SYMTAB_SHNDX handlingAlan Modra1-5/+0
.symtab_shndx section contents is an array, one entry for each symbol in .symtab, present when the number of symbols exceeds a little less than 64k. Since the mapping is 1-1 with symbols there is no need to keep both dest_index and destshndx_index in elf_sym_strtab. Instead, just make sure that the shndx pointers to the swap functions are kept NULL when .symtab_shndx does not exist. Also, strtabcount in the linker's elf hash table is incremented in lock-step with the output symcount, so that can disappear too.
2021-07-08elf: Add GNU_PROPERTY_1_NEEDED checkH.J. Lu1-0/+6
If GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS is set on any input relocatable files: 1. Don't generate copy relocations. 2. Turn off extern_protected_data since it implies GNU_PROPERTY_NO_COPY_ON_PROTECTED. 3. Treate reference to protected symbols with indirect external access as local. 4. Set GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS on output. 5. When generating executable, clear this bit when there are non-GOT or non-PLT relocations in input relocatable files without the bit set. 6. Add -z [no]indirect-extern-access to control indirect external access. bfd/ * elf-bfd (elf_obj_tdata): Add has_indirect_extern_access. (elf_has_indirect_extern_access): New. * elf-properties.c (_bfd_elf_parse_gnu_properties): Set elf_has_indirect_extern_access and elf_has_no_copy_on_protected when seeing GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS. (elf_write_gnu_propertie): Add an argument to pass link_info. Set needed_1_p for GNU_PROPERTY_1_NEEDED in memory. (_bfd_elf_link_setup_gnu_properties): Handle GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS for -z indirect-extern-access. Set nocopyreloc to true and extern_protected_data to false for indirect external access. (_bfd_elf_convert_gnu_properties): Updated. * elf32-i386.c (elf_i386_check_relocs): Set non_got_ref_without_indirect_extern_access on legacy non-GOT or non-PLT references. * elf64-x86-64.c (elf_x86_64_check_relocs): Likewise. * elflink.c (_bfd_elf_symbol_refs_local_p): Return true for STV_PROTECTED symbols with indirect external access. * elfxx-x86.c (_bfd_x86_elf_adjust_dynamic_symbol): Clear indirect_extern_access for legacy non-GOT/non-PLT references. * elfxx-x86.h (elf_x86_link_hash_entry): Add non_got_ref_without_indirect_extern_access. include/ * bfdlink.h (bfd_link_info): Add indirect_extern_access and needed_1_p. Change nocopyreloc to int. ld/ * NEWS: Mention -z [no]indirect-extern-access * ld.texi: Document -z [no]indirect-extern-access * ldmain.c (main): Initialize link_info.indirect_extern_access to -1. * emulparams/extern_protected_data.sh: Support -z [no]indirect-extern-access. * testsuite/ld-elf/indirect-extern-access-1.rd: New file * testsuite/ld-elf/indirect-extern-access-1a.c: Likewise. * testsuite/ld-elf/indirect-extern-access-1b.c: Likewise. * testsuite/ld-elf/indirect-extern-access-2.rd: Likewise. * testsuite/ld-elf/indirect-extern-access-2a.c: Likewise. * testsuite/ld-elf/indirect-extern-access-2b.c: Likewise. * testsuite/ld-elf/indirect-extern-access-3.rd: Likewise. * testsuite/ld-elf/indirect-extern-access.S: Likewise. * testsuite/ld-elf/property-1_needed-1b.d: Likewise. * testsuite/ld-elf/property-1_needed-1c.d: Likewise. * testsuite/ld-x86-64/indirect-extern-access.rd: Likewise. * testsuite/ld-x86-64/protected-data-1.h: Likewise. * testsuite/ld-x86-64/protected-data-1a.c: Likewise. * testsuite/ld-x86-64/protected-data-1b.c: Likewise. * testsuite/ld-x86-64/protected-data-2a.S: Likewise. * testsuite/ld-x86-64/protected-data-2b.S: Likewise. * testsuite/ld-x86-64/protected-func-2a.S: Likewise. * testsuite/ld-x86-64/protected-func-2b.S: Likewise. * testsuite/ld-x86-64/protected-func-2c.c: Likewise. * testsuite/ld-elf/linux-x86.exp: Run test with GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS. * testsuite/ld-x86-64/x86-64.exp: Run tests for protected function and data with indirect external access.
2021-07-08ld: Limit cache size and add --max-cache-size=SIZEH.J. Lu1-0/+3
When link_info.keep_memory is true, linker caches the relocation information and symbol tables of input files in memory. When there are many input files with many relocations, we may run out of memory. Add --max-cache-size=SIZE to set the maximum cache size. bfd/ PR ld/18028 * bfd.c (bfd): Add alloc_size. * elf-bfd.h (_bfd_elf_link_info_read_relocs): New. * elf32-i386.c (elf_i386_check_relocs): Use _bfd_link_keep_memory. Update cache_size. * elf64-x86-64.c (elf_x86_64_check_relocs): Likewise. * elflink.c (_bfd_elf_link_read_relocs): Renamed to ... (_bfd_elf_link_info_read_relocs): This. Update cache_size. (_bfd_elf_link_read_relocs): New. (_bfd_elf_link_check_relocs): Call _bfd_elf_link_info_read_relocs instead of _bfd_elf_link_read_relocs. (elf_link_add_object_symbols): Likewise. (elf_link_input_bfd): Likewise. (init_reloc_cookie_rels): Likewise. (init_reloc_cookie): Update cache_size. Call _bfd_elf_link_info_read_relocs instead of _bfd_elf_link_read_relocs. (link_info_ok): New. (elf_gc_smash_unused_vtentry_relocs): Updated. Call _bfd_elf_link_info_read_relocs instead of _bfd_elf_link_read_relocs. (bfd_elf_gc_sections): Use link_info_ok. Pass &link_info_ok to elf_gc_smash_unused_vtentry_relocs. * libbfd-in.h (_bfd_link_keep_memory): New. * linker.c (_bfd_link_keep_memory): New. * opncls.c (bfd_alloc): Update alloc_size. * bfd-in2.h: Regenerated. * libbfd.h: Likewise. include/ PR ld/18028 * bfdlink.h (bfd_link_info): Add cache_size and max_cache_size. ld/ PR ld/18028 * NEWS: Mention --max-cache-size=SIZE. * ld.texi: Document --max-cache-size=SIZE. * ldlex.h (option_values): Add OPTION_MAX_CACHE_SIZE. * ldmain.c: (main): Set link_info.max_cache_size to -1. * lexsup.c (ld_options): Add --max-cache-size=SIZE. (parse_args): Support OPTION_MAX_CACHE_SIZE. * testsuite/ld-bootstrap/bootstrap.exp: Add test for --max-cache-size=-1.
2021-06-11PR27952, Disallow ET_DYN DF_1_PIE linker inputAlan Modra1-0/+3
This patch adds a new elf_tdata flag, is_pie, set during the linker's open_input_bfds processing. The flag is then used to reject attempts to link a PIE as if it were a shared library. bfd/ PR 27952 * elf-bfd.h (struct elf_obj_tdata): Add is_pie. * elflink.c (elf_link_add_object_symbols): Set is_pie. ld/ PR 27952 * ldelf.c (ldelf_after_open): Error on input PIEs too.
2021-05-12Add MTE register set support for core filesLuis Machado1-0/+2
* elf-bfd.h (elfcore_write_aarch_mte): New prototype. * elf.c (elfcore_grok_aarch_mte, elfcore_write_aarch_mte): New functions. (elfcore_grok_note): Handle notes of type NT_ARM_TAGGED_ADDR_CTRL. (elfcore_write_register_note): Handle MTE notes.
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