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>
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.
This patch is aimed at making __bss_start properly aligned with the
first of any bss-style sections following. Most of the work here
involves keeping track of the last output section seen when processing
the linker script.
You can almost align __bss_start properly by using
${RELOCATING+. = ALIGN(${DATA_SDATA-${NO_SMALL_DATA-ALIGNOF(.${SBSS_NAME}) != 0 ? ALIGNOF(.${SBSS_NAME}) : }}${BSS_PLT+ALIGNOF(.plt) != 0 ? ALIGNOF(.plt) : }ALIGNOF(.${BSS_NAME}));}
and changing every place that defines NO_SMALL_DATA to use " ", but
having two .plt sections (marked SPECIAL) on some backends foils that
idea. The problem is that you only want to pick up the following
.plt, not the one preceeding __bss_start in the data segment if the
backend decides that is the proper .plt section.
Perhaps that could be fixed too, but I decided instead to extend the
linker script a little. THIS_SECTION and PREV_SECTION could easily be
added too.
* ld.texi (ALIGNOF, SIZEOF): Update and mention NEXT_SECTION.
* ldexp.c (output_section_find): New function.
(fold_name <ALIGNOF, SIZEOF>): Use output_section_find.
(exp_fold_tree): Add os parameter. Adjust all calls.
(exp_fold_tree_no_dot, exp_get_vma, exp_get_power): Likewise.
* ldexp.h (struct ldexp_control): Add last_os.
(exp_fold_tree, exp_fold_tree_no_dot): Update prototypes.
(exp_get_vma, exp_get_power): Likewise.
* ldlang.c: Pass last output section to expression folder
calls throughout file.
(open_input_bfds): Add os parameter to track last os seen.
(lang_size_sections_1): Rename output_section_statement param
to current_os. Track last os.
(lang_do_assignments_1): Track last os.
* scripttempl/arclinux.sc: Align to ALIGNOF NEXT_SECTION
before defining __bss_start.
* scripttempl/elf.sc: Likewise.
* scripttempl/elf64bpf.sc: Likewise.
* scripttempl/elf64hppa.sc: Likewise.
* scripttempl/elf_chaos.sc: Likewise.
* scripttempl/elfarc.sc: Likewise.
* scripttempl/elfd10v.sc: Likewise.
* scripttempl/elfxtensa.sc: Likewise.
* scripttempl/epiphany_4x4.sc: Likewise.
* scripttempl/iq2000.sc: Likewise.
* scripttempl/mep.sc: Likewise.
* scripttempl/nds32elf.sc: Likewise.
* scripttempl/xstormy16.sc: Likewise.
* testsuite/ld-x86-64/pe-x86-64-5.od: Update expected __bss_start.
* testsuite/ld-x86-64/pe-x86-64-5.rd: Likewise.
Output sections without any input sections to initialise their flags
have their flags initialised by data statements to LOAD, ALLOC,
HAS_CONTENTS by default. This is wrong for .comment. Fix that by
making the script initialise the section type to INFO, one of the
noalloc section types. That also allows the address of .comment to be
set to zero, as is usual for non-alloc sections.
Also, use source_sh for all of the sourced scripts to set up make
dependencies.
PR 30187
* scripttempl/misc-sections.sc: Set .comment address to zero
and type to INFO.
* scripttempl/ft32.sc: Fix breakages from last edit.
* scripttempl/arclinux.sc: Use source_sh to source DWARF.sc
and misc-sections.sc.
* scripttempl/avr.sc: Likewise.
* scripttempl/dlx.sc: Likewise.
* scripttempl/elf.sc: Likewise.
* scripttempl/elf32cr16.sc: Likewise.
* scripttempl/elf32crx.sc: Likewise.
* scripttempl/elf32msp430.sc: Likewise.
* scripttempl/elf64bpf.sc: Likewise.
* scripttempl/elf64hppa.sc: Likewise.
* scripttempl/elf_chaos.sc: Likewise.
* scripttempl/elfarc.sc: Likewise.
* scripttempl/elfarcv2.sc: Likewise.
* scripttempl/elfd10v.sc: Likewise.
* scripttempl/elfd30v.sc: Likewise.
* scripttempl/elfm68hc11.sc: Likewise.
* scripttempl/elfm68hc12.sc: Likewise.
* scripttempl/elfm9s12z.sc: Likewise.
* scripttempl/elfmicroblaze.sc: Likewise.
* scripttempl/elfxgate.sc: Likewise.
* scripttempl/elfxtensa.sc: Likewise.
* scripttempl/epiphany_4x4.sc: Likewise.
* scripttempl/i386beos.sc: Likewise.
* scripttempl/i386go32.sc: Likewise.
* scripttempl/ia64vms.sc: Likewise.
* scripttempl/ip2k.sc: Likewise.
* scripttempl/iq2000.sc: Likewise.
* scripttempl/mep.sc: Likewise.
* scripttempl/mmo.sc: Likewise.
* scripttempl/nds32elf.sc: Likewise.
* scripttempl/pru.sc: Likewise.
* scripttempl/v850.sc: Likewise.
* scripttempl/v850_rh850.sc: Likewise.
* scripttempl/visium.sc: Likewise.
* scripttempl/xstormy16.sc: Likewise.
* scripttempl/z80.sc: Likewise.
* testsuite/ld-scripts/ld-version-2.d: Don't skip ft32 or pru.
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.
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.
The special case for .init and .fini in update_wild_statements is
ineffective for .init or .fini wildcards inside other output sections.
The special case needs to be on the wildcard, not the output section.
This patch is belt and braces, both fixing update_wild_statements and
the scripts.
* scripttempl/alpha.sc, * scripttempl/armbpabi.sc,
* scripttempl/crisaout.sc, * scripttempl/elf32cr16.sc,
* scripttempl/elf32crx.sc, * scripttempl/elf32xc16x.sc,
* scripttempl/elf32xc16xl.sc, * scripttempl/elf32xc16xs.sc,
* scripttempl/elf64hppa.sc, * scripttempl/elf_chaos.sc,
* scripttempl/elfarc.sc, * scripttempl/elfarcv2.sc,
* scripttempl/elfd30v.sc, * scripttempl/elfm68hc11.sc,
* scripttempl/elfm68hc12.sc, * scripttempl/elfm9s12z.sc,
* scripttempl/elfmicroblaze.sc, * scripttempl/elfxgate.sc,
* scripttempl/elfxtensa.sc, * scripttempl/epiphany_4x4.sc,
* scripttempl/ft32.sc, * scripttempl/i386beos.sc,
* scripttempl/iq2000.sc, * scripttempl/mcorepe.sc,
* scripttempl/mep.sc, * scripttempl/mips.sc, * scripttempl/moxie.sc,
* scripttempl/pe.sc, * scripttempl/pep.sc, * scripttempl/ppcpe.sc,
* scripttempl/tic4xcoff.sc, * scripttempl/tic80coff.sc,
* scripttempl/v850.sc, * scripttempl/v850_rh850.sc,
* scripttempl/visium.sc, * scripttempl/xstormy16.sc: Add KEEP and
SORT_NONE to .init and .fini wildcards.
* scripttempl/elf32xc16x.sc,
* scripttempl/elf32xc16xl.sc,
* scripttempl/elf32xc16xs.sc: Add .fini wildcard.
* scripttempl/elf_chaos.sc: Add .init output section.
* scripttempl/elfd30v.sc: Remove duplicate .init.
* scripttempl/elfm68hc11.sc, * scripttempl/elfm68hc12.sc,
* scripttempl/elfm9s12z.sc, * scripttempl/elfxgate.sc: Remove
duplicate .init, and add .fini wildcard.
* scripttempl/ppcpe.sc (INIT, FINI): Delete.
* ldlang.c (update_wild_statements): Special case .init and
.fini in the wildcard, not the output section.
For ld -r, we generally set the VMA of sections to zero. This is done
to make the output of ld -r most similar to that output by the
assembler, which generally has sections starting at VMA zero. In some
cases that covers for backend bugs which would mis-handle relocatable
object files with non-zero section VMAs.
This patch fixes a few sections that didn't have zero VMAs for ld -r.
A missing zero on .note.gnu.build-id and .eh_frame_hdr doesn't matter
much since these are linker generated symbols only output on final
link, but it's good to be consistent.
* Makefile.am (ei386beos.c, ei386go32.c): Correct dependencies.
* Makefile.in: Regenerate.
* scripttempl/elf.sc (.note.gnu.build-id, .eh_frame_hdr): Set
address with ${RELOCATING-0}.
* scripttempl/arclinux.sc: Likewise.
* scripttempl/armbpabi.sc: Likewise.
* scripttempl/avr.sc: Likewise.
* scripttempl/elf64hppa.sc: Likewise.
* scripttempl/elf_chaos.sc: Likewise.
* scripttempl/elfarc.sc: Likewise.
* scripttempl/elfxtensa.sc: Likewise.
* scripttempl/mep.sc: Likewise.
* scripttempl/nds32elf.sc: Likewise.
* scripttempl/pru.sc: Likewise.
* scripttempl/elf32msp430.sc: Likewise, and for other sections.
* scripttempl/epiphany_4x4.sc: Similarly.
* elf32-xtensa.c (xtensa_get_property_section_name): Delete.
(xtensa_get_property_section): New.
(xtensa_read_table_entries): Use xtensa_get_property_section.
(relax_property_section, xtensa_get_property_predef_flags): Handle
group name suffixes in property section names.
(match_section_group): New.
gas/
* config/tc-xtensa.c (FINI_LITERAL_SECTION_NAME): Delete.
(INIT_LITERAL_SECTION_NAME): Delete.
(lit_state struct): Remove segment names, init_lit_seg, and
fini_lit_seg. Add lit_prefix and current_text_seg.
(init_literal_head_h, init_literal_head): Delete.
(fini_literal_head_h, fini_literal_head): Delete.
(xtensa_begin_directive): Move argument parsing to
xtensa_literal_prefix function.
(xtensa_end_directive): Deallocate lit_prefix field of lit_state.
(xtensa_literal_prefix): Parse the directive argument here and
record it in the lit_prefix field. Remove code to derive literal
section names.
(linkonce_len): New.
(get_is_linkonce_section): Use linkonce_len. Check for any
".gnu.linkonce.*" section, not just text sections.
(md_begin): Remove initialization of deleted lit_state fields.
(xtensa_reorder_segments, xtensa_post_relax_hook): Remove references
to init_literal_head and fini_literal_head.
(xtensa_move_literals): Likewise. Skip literals for .init and .fini
when traversing literal_head list.
(match_section_group): New.
(cache_literal_section): Rewrite to determine the literal section
name on the fly, create the section and return it.
(xtensa_switch_to_literal_fragment): Adjust for cache_literal_section.
(xtensa_switch_to_non_abs_literal_fragment): Likewise.
(xtensa_create_property_segments, xtensa_create_xproperty_segments):
Use xtensa_get_property_section from bfd.
(retrieve_xtensa_section): Delete.
* doc/c-xtensa.texi (Xtensa Options): Fix --text-section-literals
description to refer to plural literal sections and add xref to
the Literal Directive section.
(Literal Directive): Describe new rules for deriving literal section
names. Add footnote for special case of .init/.fini with
--text-section-literals.
(Literal Prefix Directive): Replace old naming rules with xref to the
Literal Directive section.
ld/
* emulparams/elf32xtensa.sh (.xt.prop): Add .xt.prop.*.
* scripttempl/elfxtensa.sc (.text): Add .literal.*.
