1999-05-03 15:29:11 +08:00
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-*- text -*-
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2018-01-12 16:15:55 +08:00
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2020-09-12 20:37:30 +08:00
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* Add -z unique-symbol to avoid duplicated local symbol names.
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2020-08-27 19:58:27 +08:00
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* The creation of PE format DLLs now defaults to using a more secure set of DLL
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characteristics.
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ld: new options --ctf-variables and --ctf-share-types
libctf recently changed to make it possible to not emit the CTF
variables section. Make this the default for ld: the variables section
is a simple name -> type mapping, and the names can be quite voluminous.
Nothing in the variables section appears in the symbol table, by
definition, so GDB cannot make use of them: special-purpose projects
that implement their own analogues of symbol table lookup can do so, but
they'll need to tell the linker to emit the variables section after all.
The new --ctf-variables option does this.
The --ctf-share-types option (valid values "share-duplicated" and
"share-unconflicted") allow the caller to specify the CTF link mode.
Most users will want share-duplicated, since it allows for more
convenient debugging: but very large projects composed of many decoupled
components may want to use share-unconflicted mode, which places types
that appear in only one TU into per-TU dicts. (They may also want to
relink the CTF using the ctf_link API and cu-mapping, to make their
"components" larger than a single TU. Right now the linker does not
expose the CU-mapping machinery. Perhaps it should in future to make
this use case easier.)
For now, giving the linker the ability to emit share-duplicated CTF lets
us add testcases for that mode to the testsuite.
ld/
* ldlex.h (option_values) <OPTION_CTF_VARIABLES,
OPTION_NO_CTF_VARIABLES, OPTION_CTF_SHARE_TYPES>: New.
* ld.h (ld_config_type) <ctf_variables, ctf_share_duplicated>:
New fields.
* ldlang.c (lang_merge_ctf): Use them.
* lexsup.c (ld_options): Add ctf-variables, no-ctf-variables,
ctf-share-types.
(parse_args) <OPTION_CTF_VARIABLES, OPTION_NO_CTF_VARIABLES,
OPTION_CTF_SHARE_TYPES>: New cases.
* ld.texi: Document new options.
* NEWS: Likewise.
2020-06-06 06:18:06 +08:00
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* The linker now deduplicates the types in .ctf sections. The new
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command-line option --ctf-share-types describes how to do this:
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its default value, share-unconflicted, produces the most compact
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output.
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* The linker now omits the "variable section" from .ctf sections by
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default, saving space. This is almost certainly what you want
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unless you are working on a project that has its own analogue
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of symbol tables that are not reflected in the ELF symtabs.
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2020-07-04 17:16:22 +08:00
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Changes in 2.35:
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2020-06-30 23:47:02 +08:00
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* X86 NaCl target support is removed.
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2020-06-03 21:37:39 +08:00
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* Add ELF linker command-line options, --export-dynamic-symbol and
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--export-dynamic-symbol-list, to make symbols dynamic.
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2020-05-28 19:21:04 +08:00
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* Add a configure option, --enable-textrel-check=[no|yes|warning|error],
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to decide what ELF linker should do by default with DT_TEXTREL in an
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2020-05-28 19:36:33 +08:00
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executable or shared library. Default to yes for Linux/x86 targets.
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2020-05-28 19:21:04 +08:00
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2020-05-28 00:49:17 +08:00
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* The -Map=<filename> command line option has been extended so that if
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2020-05-28 17:51:29 +08:00
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<filename> is a directory then <filename>/<output-filename>.map will be
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created.
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2020-05-28 00:49:17 +08:00
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2020-05-27 19:53:54 +08:00
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* Add a command-line option for ELF linker, --warn-textrel, to warn that
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DT_TEXTREL is set in a position-independent executable or shared object.
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2019-11-25 16:55:37 +08:00
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* Add command-line options --enable-non-contiguous-regions and
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--enable-non-contiguous-regions-warnings.
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Fixes for the magic number used in PDP11 AOUT binaries.
PR ld/25677
include * aout/aout64.h (N_DATADDR): Add IMAGIC case.
bfd * pdp11.c: Add implementation of --imagic option.
(adjust_o_magic): Fix objcopy --extract-symbol test.
* libaout.h (enum aout_magic): Add i_magic.
ld * emulparams/pdp11.sh (SCRIPT_NAME): Change to pdp11.
(EXTRA_EM_FILE): New, add emulation file pdp11.
* scripttempl/pdp11.sc: New, derived from aout.sc without
irrelevant input sections.
* emultempl/pdp11.em (_add_options, _handle_option)
(_list_options): New. Add options -z, --imagic for pdp11-aout.
(_before_parse): Make --omagic be default instead of --nmagic.
(_get_script): Modify special-case linker script for --imagic.
* lexsup.c (parse_args): Explictly set config.text_read_only for -n.
* ld.texi (Options): Add documentation of PDP11-specific options.
(Options): Fix unrelated typo to --no-compact-branches.
* gen-doc.texi: @set PDP11.
* testsuite/ld-pdp11/pdp11.exp: New, start pdp11 testing.
* testsuite/ld-pdp11/sections.s: New, source for options tests.
* testsuite/ld-pdp11/imagic.d: New, test --imagic format.
* testsuite/ld-pdp11/imagicz.d: New, test -z (imagic) format.
* testsuite/ld-pdp11/nmagic.d: New, test --nmagic format.
* testsuite/ld-pdp11/omagic.d: New, test --omagic format.
2020-04-14 21:41:27 +08:00
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* Add command-line option --imagic for the pdp11-aout target to output format
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IMAGIC (0411) for separate instruction and data spaces, and change the
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default format option for pdp11-aout to be --omagic.
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2020-04-22 23:20:02 +08:00
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* Relative pathnames in INPUT() and GROUP() directives in linker scripts are
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searched relative to the directory of the linker script before other search
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paths.
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2020-06-16 02:45:02 +08:00
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* Add ELF linker command-line option `-z start-stop-visibility=...' to control
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the visibility of synthetic `__start_SECNAME` and `__stop_SECNAME` symbols.
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2020-06-24 03:01:24 +08:00
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* Add command-line option --dependency-file to write a Make-style dependency
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file listing the input files consulted by the linker, like the files written
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by the compiler's -M -MP options.
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2020-01-18 21:50:25 +08:00
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Changes in 2.34:
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2020-02-22 10:16:33 +08:00
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* The ld check for "PHDR segment not covered by LOAD segment" is more
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effective, catching cases that were wrongly allowed by previous versions of
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ld. If you see this error it is likely you are linking with a bad linker
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script or the binary you are building is not intended to be loaded by a
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dynamic loader. In the latter case --no-dynamic-linker is appropriate.
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Remove CR16C support
I think it is past time to remove CR16C support. CR16C was added in
2004, and only for ld. gas and binutils support is lacking, and there
have been no commits to bfd/elf32-cr16c.c other than warning fixes or
global maintainers making changes to all targets. I see no maintainer
listed for CR16C, and no commits from anyone at NSC supporting the
target. Furthermore, at the time the CR16 support was added in 2007,
config.sub was changed upstream to no longer recognise cr16c as a
valid cpu. That means the CR16C ld support is only available as a
secondary target by configuring with, for example,
--enable-targets=all or --enable-targets=cr16c-unknown-elf. No
testing of the CR16C target is possible.
include/
* elf/cr16c.h: Delete.
bfd/
* cpu-cr16c.c: Delete.
* elf32-cr16c.c: Delete.
* Makefile.am,
* archures.c,
* config.bfd,
* configure.ac,
* reloc.c,
* targets.c: Remove cr16c support.
* Makefile.in,
* bfd-in2.h,
* configure,
* libbfd.h,
* po/SRC-POTFILES.in: Regenerate.
ld/
* emulparams/elf32cr16c.sh: Delete.
* scripttempl/elf32cr16c.sc: Delete.
* Makefile.am,
* configure.tgt: Remove cr16c support.
* NEWS: Mention removal of cr16c.
* Makefile.in,
* po/BLD-POTFILES.in: Regenerate.
2019-11-07 11:02:16 +08:00
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* cr16c support removed.
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2020-01-02 22:10:40 +08:00
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* Add support for z80-elf.
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* Add support for relocation of each byte or word of multibyte value to Z80
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targets.
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* Add support for Zilog eZ80 (both ADL and Z80 mode) and Zilog Z180 CPUs.
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2019-09-09 17:27:03 +08:00
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Changes in 2.33:
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2019-04-03 04:17:16 +08:00
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* Add command-line option --no-print-map-discarded.
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2019-05-21 20:04:08 +08:00
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* The Cortex-A53 Erratum 843419 workaround now supports a choice of which
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workaround to use. The option --fix-cortex-a53-843419 now takes an
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optional argument --fix-cortex-a53-843419[=full|adr|adrp] which can be
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used to force a particular workaround to be used. See --help for AArch64
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for more details.
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2019-03-13 18:42:27 +08:00
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* Add target handlers for AArch64 for ELF GNU program properties.
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* Add support for GNU_PROPERTY_AARCH64_FEATURE_1_BTI in ELF GNU program
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properties in the AArch64 ELF linker.
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* Add support for GNU_PROPERTY_AARCH64_FEATURE_1_PAC in ELF GNU program
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properties in the AArch64 ELF linker.
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2019-06-06 19:21:14 +08:00
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* Add -z force-bti for AArch64 to enable GNU_PROPERTY_AARCH64_FEATURE_1_BTI
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[BFD, LD, AArch64, 2/3] Add --force-bti to enable BTI and to select BTI enabled PLTs
This is part of the patch series to add support for BTI and
PAC in AArch64 linker.
1) This patch adds a new ld command line option: --force-bti.
In the presence of this option, the linker enables BTI with the
GNU_PROPERTY_AARCH64_FEATURE_1_BTI feature. This gives out warning
in case of missing gnu notes for BTI in inputs.
2) It also defines a new set of BTI enabled PLTs. These are used either
when all the inputs are marked with GNU_PROPERTY_AARCH64_FEATURE_1_BTI
or when the new --force-bti option is used. This required adding new
fields in elf_aarch64_link_hash_table so that we could make the PLT
related information more generic.
3) It also defines a dynamic tag DT_AARCH64_BTI_PLT. The linker uses
this whenever it picks BTI enabled PLTs.
All these are made according to the new AArch64 ELF ABI
https://developer.arm.com/docs/ihi0056/latest/elf-for-the-arm-64-bit-architecture-aarch64-abi-2018q4
*** bfd/ChangeLog ***
2019-03-13 Sudakshina Das <sudi.das@arm.com>
Szabolcs Nagy <szabolcs.nagy@arm.com>
* bfd-in.h (aarch64_plt_type, aarch64_enable_bti_type): New.
(aarch64_bti_pac_info): New.
(bfd_elf64_aarch64_set_options): Add aarch64_bti_pac_info argument.
(bfd_elf32_aarch64_set_options): Likewise.
* bfd-in2.h: Regenerate
* elfnn-aarch64.c (PLT_BTI_ENTRY_SIZE): New.
(PLT_BTI_SMALL_ENTRY_SIZE, PLT_BTI_TLSDESC_ENTRY_SIZE): New.
(elfNN_aarch64_small_plt0_bti_entry): New.
(elfNN_aarch64_small_plt_bti_entry): New.
(elfNN_aarch64_tlsdesc_small_plt_bti_entry): New.
(elf_aarch64_obj_tdata): Add no_bti_warn and plt_type fields.
(elf_aarch64_link_hash_table): Add plt0_entry, plt_entry and
tlsdesc_plt_entry_size fields.
(elfNN_aarch64_link_hash_table_create): Initialise the new fields.
(setup_plt_values): New helper function.
(bfd_elfNN_aarch64_set_options): Use new bp_info to set plt sizes and
bti enable type.
(elfNN_aarch64_allocate_dynrelocs): Use new size members instead of
fixed macros.
(elfNN_aarch64_size_dynamic_sections): Likewise and add checks.
(elfNN_aarch64_create_small_pltn_entry): Use new generic pointers
to plt stubs instead of fixed ones and update filling them according
to the need for bti.
(elfNN_aarch64_init_small_plt0_entry): Likewise.
(elfNN_aarch64_finish_dynamic_sections): Likewise.
(get_plt_type, elfNN_aarch64_get_synthetic_symtab): New.
(elfNN_aarch64_plt_sym_val): Update size accordingly.
(elfNN_aarch64_link_setup_gnu_properties): Set up plts if BTI GNU NOTE
is set.
(bfd_elfNN_get_synthetic_symtab): Define.
(elfNN_aarch64_merge_gnu_properties): Give out warning with --force-bti
and mising BTI NOTE SECTION.
*** binutils/ChangeLog ***
2019-03-13 Sudakshina Das <sudi.das@arm.com>
Szabolcs Nagy <szabolcs.nagy@arm.com>
* readelf.c (get_aarch64_dynamic_type): New.
(get_dynamic_type): Use above for EM_AARCH64.
(dynamic_section_aarch64_val): New.
(process_dynamic_section): Use above for EM_AARCH64.
*** include/ChangeLog ***
2019-03-13 Sudakshina Das <sudi.das@arm.com>
Szabolcs Nagy <szabolcs.nagy@arm.com>
* elf/aarch64.h (DT_AARCH64_BTI_PLT): New.
*** ld/ChangeLog ***
2019-03-13 Sudakshina Das <sudi.das@arm.com>
Szabolcs Nagy <szabolcs.nagy@arm.com>
* NEWS: Document --force-bti.
* emultempl/aarch64elf.em (plt_type, bti_type, OPTION_FORCE_BTI): New.
(PARSE_AND_LIST_SHORTOPTS, PARSE_AND_LIST_OPTIONS): Add force-bti.
(PARSE_AND_LIST_ARGS_CASES): Handle OPTION_FORCE_BTI.
* testsuite/ld-aarch64/aarch64-elf.exp: Add all the tests below.
* testsuite/ld-aarch64/bti-plt-1.d: New test.
* testsuite/ld-aarch64/bti-plt-1.s: New test.
* testsuite/ld-aarch64/bti-plt-2.s: New test.
* testsuite/ld-aarch64/bti-plt-2.d: New test.
* testsuite/ld-aarch64/bti-plt-3.d: New test.
* testsuite/ld-aarch64/bti-plt-4.d: New test.
* testsuite/ld-aarch64/bti-plt-5.d: New test.
* testsuite/ld-aarch64/bti-plt-6.d: New test.
* testsuite/ld-aarch64/bti-plt-7.d: New test.
* testsuite/ld-aarch64/bti-plt-so.s: New test.
* testsuite/ld-aarch64/bti-plt.ld: New test.
2019-03-13 18:54:30 +08:00
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on output while warning about missing GNU_PROPERTY_AARCH64_FEATURE_1_BTI
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on inputs and use PLTs protected with BTI.
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2019-06-06 19:21:14 +08:00
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* Add -z pac-plt for AArch64 to pick PAC enabled PLTs.
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2019-03-13 19:09:10 +08:00
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2019-01-20 00:51:42 +08:00
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Changes in 2.32:
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2018-12-08 00:30:30 +08:00
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* Report property change in linker map file when merging GNU properties.
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Add support for the C_SKY series of processors.
This patch series is a new binutils port for C-SKY processors, including support for both the V1 and V2 processor variants. V1 is derived from the MCore architecture while V2 is substantially different, with mixed 16- and 32-bit instructions, a larger register set, a different (but overlapping) ABI, etc. There is support for bare-metal ELF targets and Linux with both glibc and uClibc.
This code is being contributed jointly by C-SKY Microsystems and Mentor Graphics. C-SKY is responsible for the technical content and has proposed Lifang Xia and Yunhai Shang as port maintainers. (Note that C-SKY does have a corporate copyright assignment on file with the FSF.) Mentor Graphics' role has been cleaning up the code, adding documentation and additional test cases, etc, to address issues we anticipated reviewers would complain about.
bfd * Makefile.am (ALL_MACHINES, ALL_MACHINES_CFILES): Add C-SKY.
(BFD32_BACKENDS, BFD_BACKENDS_CFILES): Likewise.
* Makefile.in: Regenerated.
* archures.c (enum bfd_architecture): Add bfd_arch_csky and
related bfd_mach defines.
(bfd_csky_arch): Declare.
(bfd_archures_list): Add C-SKY.
* bfd-in.h (elf32_csky_build_stubs): Declare.
(elf32_csky_size_stubs): Declare.
(elf32_csky_next_input_section: Declare.
(elf32_csky_setup_section_lists): Declare.
* bfd-in2.h: Regenerated.
* config.bfd: Add C-SKY.
* configure.ac: Likewise.
* configure: Regenerated.
* cpu-csky.c: New file.
* elf-bfd.h (enum elf_target_id): Add C-SKY.
* elf32-csky.c: New file.
* libbfd.h: Regenerated.
* reloc.c: Add C-SKY relocations.
* targets.c (csky_elf32_be_vec, csky_elf32_le_vec): Declare.
(_bfd_target_vector): Add C-SKY target vector entries.
binutils* readelf.c: Include elf/csky.h.
(guess_is_rela): Handle EM_CSKY.
(dump_relocations): Likewise.
(get_machine_name): Likewise.
(is_32bit_abs_reloc): Likewise.
include * dis-asm.h (csky_symbol_is_valid): Declare.
* opcode/csky.h: New file.
opcodes * Makefile.am (TARGET_LIBOPCODES_CFILES): Add csky-dis.c.
* Makefile.in: Regenerated.
* configure.ac: Add C-SKY.
* configure: Regenerated.
* csky-dis.c: New file.
* csky-opc.h: New file.
* disassemble.c (ARCH_csky): Define.
(disassembler, disassemble_init_for_target): Add case for ARCH_csky.
* disassemble.h (print_insn_csky, csky_get_disassembler): Declare.
gas * Makefile.am (TARGET_CPU_CFILES): Add entry for C-SKY.
(TARGET_CPU_HFILES, TARGET_ENV_HFILES): Likewise.
* Makefile.in: Regenerated.
* config/tc-csky.c: New file.
* config/tc-csky.h: New file.
* config/te-csky_abiv1.h: New file.
* config/te-csky_abiv1_linux.h: New file.
* config/te-csky_abiv2.h: New file.
* config/te-csky_abiv2_linux.h: New file.
* configure.tgt: Add C-SKY.
* doc/Makefile.am (CPU_DOCS): Add entry for C-SKY.
* doc/Makefile.in: Regenerated.
* doc/all.texi: Set CSKY feature.
* doc/as.texi (Overview): Add C-SKY options.
(Machine Dependencies): Likewise.
* doc/c-csky.texi: New file.
* testsuite/gas/csky/*: New test cases.
ld * Makefile.am (ALL_EMULATION_SOURCES): Add C-SKY emulations.
(ecskyelf.c, ecskyelf_linux.c): New rules.
* Makefile.in: Regenerated.
* configure.tgt: Add C-SKY.
* emulparams/cskyelf.sh: New file.
* emulparams/cskyelf_linux.sh: New file.
* emultempl/cskyelf.em: New file.
* gen-doc.texi: Add C-SKY.
* ld.texi: Likewise.
(Options specific to C-SKY targets): New section.
* testsuite/ld-csky/*: New tests.
2018-07-30 19:24:14 +08:00
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* Add support for the C-SKY processor series.
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2019-01-31 09:07:44 +08:00
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* -t now doesn't report members within archives, unless -t is given twice.
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A single -t is now more useful when generating a list of files that should be
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packaged for a linker bug report. For example:
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gcc hello.c -save-temps -Wl,-t | xargs realpath | sort | uniq > files
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tar cJf test.tar.xz `cat files`
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2018-06-25 01:36:15 +08:00
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Changes in 2.31:
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2018-04-04 18:18:09 +08:00
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* Speed up direct linking with DLLs for Cygwin and Mingw targets.
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2018-02-28 03:34:20 +08:00
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* Add a configure option --enable-separate-code to decide whether
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-z separate-code should be enabled in ELF linker by default. Default
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to yes for Linux/x86 targets. Note that -z separate-code can increase
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disk and memory size.
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2018-01-13 21:20:55 +08:00
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Changes in 2.30:
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2018-01-12 11:01:39 +08:00
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* Add -z separate-code to generate separate code PT_LOAD segment.
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2018-07-02 18:18:24 +08:00
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* Add "-z undefs" command-line option as the inverse of the "-z defs" option.
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2018-01-12 16:15:55 +08:00
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2018-07-02 18:18:24 +08:00
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* Add -z globalaudit command-line option to force audit libraries to be run
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2017-08-11 23:36:28 +08:00
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for every dynamic object loaded by an executable - provided that the loader
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2017-10-12 18:58:30 +08:00
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supports this functionality.
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2015-11-13 16:30:08 +08:00
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2017-07-28 20:01:10 +08:00
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* Tighten linker script grammar around file name specifiers to prevent the use
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of SORT_BY_ALIGNMENT and SORT_BY_INIT_PRIORITY on filenames. These would
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previously be accepted but had no effect.
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* The EXCLUDE_FILE directive can now be placed within any SORT_* directive
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within input section lists.
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2017-07-04 17:06:02 +08:00
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Changes in 2.29:
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2017-06-22 20:50:20 +08:00
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* Support for -z shstk in the x86 ELF linker to generate
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GNU_PROPERTY_X86_FEATURE_1_SHSTK in ELF GNU program properties.
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* Add support for GNU_PROPERTY_X86_FEATURE_1_SHSTK in ELF GNU program
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properties in the x86 ELF linker.
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x86: Support Intel IBT with IBT property and IBT-enable PLT
To support IBT in Intel Control-flow Enforcement Technology (CET)
instructions:
https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf
#define GNU_PROPERTY_X86_FEATURE_1_AND 0xc0000002
#define GNU_PROPERTY_X86_FEATURE_1_IBT (1U << 0)
are added to GNU program properties to indicate that all executable
sections are compatible with IBT when ENDBR instruction starts each
valid target where an indirect branch instruction can land.
GNU_PROPERTY_X86_FEATURE_1_IBT is set on output only if it is set on
all relocatable inputs.
The followings changes are made to the Procedure Linkage Table (PLT):
1. For 64-bit x86-64, PLT is changed to
PLT0: push GOT[1]
bnd jmp *GOT[2]
nop
...
PLTn: endbr64
push namen_reloc_index
bnd jmp PLT0
together with the second PLT section:
PLTn: endbr64
bnd jmp *GOT[namen_index]
nop
BND prefix is also added so that IBT-enabled PLT is compatible with MPX.
2. For 32-bit x86-64 (x32) and i386, PLT is changed to
PLT0: push GOT[1]
jmp *GOT[2]
nop
...
PLTn: endbr64 # endbr32 for i386.
push namen_reloc_index
jmp PLT0
together with the second PLT section:
PLTn: endbr64 # endbr32 for i386.
jmp *GOT[namen_index]
nop
BND prefix isn't used since MPX isn't supported on x32 and BND registers
aren't used in parameter passing on i386.
GOT is an array of addresses. Initially, GOT[namen_index] is filled
with the address of the ENDBR instruction of the corresponding entry
in the first PLT section. The function, namen, is called via the
ENDBR instruction in the second PLT entry. GOT[namen_index] is updated
to the actual address of the function, namen, at run-time.
2 linker command line options are added:
1. -z ibtplt: Generate IBT-enabled PLT.
2. -z ibt: Generate GNU_PROPERTY_X86_FEATURE_1_IBT in GNU program
properties as well as IBT-enabled PLT.
bfd/
* elf32-i386.c (elf_i386_lazy_ibt_plt0_entry): New.
(elf_i386_lazy_ibt_plt_entry): Likewise.
(elf_i386_pic_lazy_ibt_plt0_entry): Likewise.
(elf_i386_non_lazy_ibt_plt_entry): Likewise.
(elf_i386_pic_non_lazy_ibt_plt_entry): Likewise.
(elf_i386_eh_frame_lazy_ibt_plt): Likewise.
(elf_i386_lazy_plt_layout): Likewise.
(elf_i386_non_lazy_plt_layout): Likewise.
(elf_i386_link_hash_entry): Add plt_second.
(elf_i386_link_hash_table): Add plt_second and
plt_second_eh_frame.
(elf_i386_allocate_dynrelocs): Use the second PLT if needed.
(elf_i386_size_dynamic_sections): Use .plt.got unwind info for
the second PLT. Check the second PLT.
(elf_i386_relocate_section): Use the second PLT to resolve
PLT reference if needed.
(elf_i386_finish_dynamic_symbol): Fill and use the second PLT if
needed.
(elf_i386_finish_dynamic_sections): Set sh_entsize on the
second PLT. Generate unwind info for the second PLT.
(elf_i386_plt_type): Add plt_second.
(elf_i386_get_synthetic_symtab): Support the second PLT.
(elf_i386_parse_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND.
(elf_i386_merge_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND. If info->ibt is set, turn
on GNU_PROPERTY_X86_FEATURE_1_IBT
(elf_i386_link_setup_gnu_properties): If info->ibt is set,
turn on GNU_PROPERTY_X86_FEATURE_1_IBT. Use IBT-enabled PLT
for info->ibtplt, info->ibt or GNU_PROPERTY_X86_FEATURE_1_IBT
is set on all relocatable inputs.
* elf64-x86-64.c (elf_x86_64_lazy_ibt_plt_entry): New.
(elf_x32_lazy_ibt_plt_entry): Likewise.
(elf_x86_64_non_lazy_ibt_plt_entry): Likewise.
(elf_x32_non_lazy_ibt_plt_entry): Likewise.
(elf_x86_64_eh_frame_lazy_ibt_plt): Likewise.
(elf_x32_eh_frame_lazy_ibt_plt): Likewise.
(elf_x86_64_lazy_ibt_plt): Likewise.
(elf_x32_lazy_ibt_plt): Likewise.
(elf_x86_64_non_lazy_ibt_plt): Likewise.
(elf_x32_non_lazy_ibt_plt): Likewise.
(elf_x86_64_get_synthetic_symtab): Support the second PLT.
(elf_x86_64_parse_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND.
(elf_x86_64_merge_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND. If info->ibt is set, turn
on GNU_PROPERTY_X86_FEATURE_1_IBT
(elf_x86_64_link_setup_gnu_properties): If info->ibt is set,
turn on GNU_PROPERTY_X86_FEATURE_1_IBT. Use IBT-enabled PLT
for info->ibtplt, info->ibt or GNU_PROPERTY_X86_FEATURE_1_IBT
is set on all relocatable inputs.
binutils/
* readelf.c (decode_x86_feature): New.
(print_gnu_property_note): Call decode_x86_feature on
GNU_PROPERTY_X86_FEATURE_1_AND.
* testsuite/binutils-all/i386/empty.d: New file.
* testsuite/binutils-all/i386/empty.s: Likewise.
* testsuite/binutils-all/i386/ibt.d: Likewise.
* testsuite/binutils-all/i386/ibt.s: Likewise.
* testsuite/binutils-all/x86-64/empty-x32.d: Likewise.
* testsuite/binutils-all/x86-64/empty.d: Likewise.
* testsuite/binutils-all/x86-64/empty.s: Likewise.
* testsuite/binutils-all/x86-64/ibt-x32.d: Likewise.
* testsuite/binutils-all/x86-64/ibt.d: Likewise.
* testsuite/binutils-all/x86-64/ibt.s: Likewise.
include/
* bfdlink.h (bfd_link_info): Add ibtplt and ibt.
* elf/common.h (GNU_PROPERTY_X86_FEATURE_1_AND): New.
(GNU_PROPERTY_X86_FEATURE_1_IBT): Likewise.
ld/
* Makefile.am (ELF_X86_DEPS): Add $(srcdir)/emulparams/cet.sh.
* Makefile.in: Regenerated.
* NEWS: Mention GNU_PROPERTY_X86_FEATURE_1_IBT, -z ibtplt
and -z ibt.
* emulparams/cet.sh: New file.
* testsuite/ld-i386/ibt-plt-1.d: Likewise.
* testsuite/ld-i386/ibt-plt-1.s: Likewise.
* testsuite/ld-i386/ibt-plt-2.s: Likewise.
* testsuite/ld-i386/ibt-plt-2a.d: Likewise.
* testsuite/ld-i386/ibt-plt-2b.d: Likewise.
* testsuite/ld-i386/ibt-plt-2c.d: Likewise.
* testsuite/ld-i386/ibt-plt-2d.d: Likewise.
* testsuite/ld-i386/ibt-plt-3.s: Likewise.
* testsuite/ld-i386/ibt-plt-3a.d: Likewise.
* testsuite/ld-i386/ibt-plt-3b.d: Likewise.
* testsuite/ld-i386/ibt-plt-3c.d: Likewise.
* testsuite/ld-i386/ibt-plt-3d.d: Likewise.
* testsuite/ld-i386/plt-main-ibt.dd: Likewise.
* testsuite/ld-i386/plt-pie-ibt.dd: Likewise.
* testsuite/ld-i386/property-x86-empty.s: Likewise.
* testsuite/ld-i386/property-x86-ibt.s: Likewise.
* testsuite/ld-i386/property-x86-ibt1a.d: Likewise.
* testsuite/ld-i386/property-x86-ibt1b.d: Likewise.
* testsuite/ld-i386/property-x86-ibt2.d: Likewise.
* testsuite/ld-i386/property-x86-ibt3a.d: Likewise.
* testsuite/ld-i386/property-x86-ibt3b.d: Likewise.
* testsuite/ld-i386/property-x86-ibt4.d: Likewise.
* testsuite/ld-i386/property-x86-ibt5.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-1-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-1.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-1.s: Likewise.
* testsuite/ld-x86-64/ibt-plt-2.s: Likewise.
* testsuite/ld-x86-64/ibt-plt-2a-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2a.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2b-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2b.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2c-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2c.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2d-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2d.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3.s: Likewise.
* testsuite/ld-x86-64/ibt-plt-3a-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3a.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3b-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3b.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3c-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3c.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3d-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3d.d: Likewise.
* testsuite/ld-x86-64/plt-main-ibt-now.rd: Likewise.
* testsuite/ld-x86-64/plt-main-ibt-x32.dd: Likewise.
* testsuite/ld-x86-64/plt-main-ibt.dd: Likewise.
* testsuite/ld-x86-64/property-x86-empty.s: Likewise.
* testsuite/ld-x86-64/property-x86-ibt.s: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1a-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1a.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1b-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1b.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt2-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt2.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3a-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3a.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3b-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3b.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt4-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt4.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt5-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt5.d: Likewise.
* emulparams/elf32_x86_64.sh: Source emulparams/cet.sh.
(TINY_READONLY_SECTION): Add .plt.sec.
* emulparams/elf_i386.sh: Likewise.
* emulparams/elf_x86_64.sh: Source emulparams/cet.sh.
* ld.texinfo: Document -z ibtplt and -z ibt.
* testsuite/ld-i386/i386.exp: Run IBT and IBT PLT tests.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-x86-64/pr21481b.S (check): Updated for x32.
2017-06-22 20:44:37 +08:00
|
|
|
|
* Add support for GNU_PROPERTY_X86_FEATURE_1_IBT in ELF GNU program
|
2017-06-22 20:50:20 +08:00
|
|
|
|
properties in the x86 ELF linker.
|
x86: Support Intel IBT with IBT property and IBT-enable PLT
To support IBT in Intel Control-flow Enforcement Technology (CET)
instructions:
https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf
#define GNU_PROPERTY_X86_FEATURE_1_AND 0xc0000002
#define GNU_PROPERTY_X86_FEATURE_1_IBT (1U << 0)
are added to GNU program properties to indicate that all executable
sections are compatible with IBT when ENDBR instruction starts each
valid target where an indirect branch instruction can land.
GNU_PROPERTY_X86_FEATURE_1_IBT is set on output only if it is set on
all relocatable inputs.
The followings changes are made to the Procedure Linkage Table (PLT):
1. For 64-bit x86-64, PLT is changed to
PLT0: push GOT[1]
bnd jmp *GOT[2]
nop
...
PLTn: endbr64
push namen_reloc_index
bnd jmp PLT0
together with the second PLT section:
PLTn: endbr64
bnd jmp *GOT[namen_index]
nop
BND prefix is also added so that IBT-enabled PLT is compatible with MPX.
2. For 32-bit x86-64 (x32) and i386, PLT is changed to
PLT0: push GOT[1]
jmp *GOT[2]
nop
...
PLTn: endbr64 # endbr32 for i386.
push namen_reloc_index
jmp PLT0
together with the second PLT section:
PLTn: endbr64 # endbr32 for i386.
jmp *GOT[namen_index]
nop
BND prefix isn't used since MPX isn't supported on x32 and BND registers
aren't used in parameter passing on i386.
GOT is an array of addresses. Initially, GOT[namen_index] is filled
with the address of the ENDBR instruction of the corresponding entry
in the first PLT section. The function, namen, is called via the
ENDBR instruction in the second PLT entry. GOT[namen_index] is updated
to the actual address of the function, namen, at run-time.
2 linker command line options are added:
1. -z ibtplt: Generate IBT-enabled PLT.
2. -z ibt: Generate GNU_PROPERTY_X86_FEATURE_1_IBT in GNU program
properties as well as IBT-enabled PLT.
bfd/
* elf32-i386.c (elf_i386_lazy_ibt_plt0_entry): New.
(elf_i386_lazy_ibt_plt_entry): Likewise.
(elf_i386_pic_lazy_ibt_plt0_entry): Likewise.
(elf_i386_non_lazy_ibt_plt_entry): Likewise.
(elf_i386_pic_non_lazy_ibt_plt_entry): Likewise.
(elf_i386_eh_frame_lazy_ibt_plt): Likewise.
(elf_i386_lazy_plt_layout): Likewise.
(elf_i386_non_lazy_plt_layout): Likewise.
(elf_i386_link_hash_entry): Add plt_second.
(elf_i386_link_hash_table): Add plt_second and
plt_second_eh_frame.
(elf_i386_allocate_dynrelocs): Use the second PLT if needed.
(elf_i386_size_dynamic_sections): Use .plt.got unwind info for
the second PLT. Check the second PLT.
(elf_i386_relocate_section): Use the second PLT to resolve
PLT reference if needed.
(elf_i386_finish_dynamic_symbol): Fill and use the second PLT if
needed.
(elf_i386_finish_dynamic_sections): Set sh_entsize on the
second PLT. Generate unwind info for the second PLT.
(elf_i386_plt_type): Add plt_second.
(elf_i386_get_synthetic_symtab): Support the second PLT.
(elf_i386_parse_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND.
(elf_i386_merge_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND. If info->ibt is set, turn
on GNU_PROPERTY_X86_FEATURE_1_IBT
(elf_i386_link_setup_gnu_properties): If info->ibt is set,
turn on GNU_PROPERTY_X86_FEATURE_1_IBT. Use IBT-enabled PLT
for info->ibtplt, info->ibt or GNU_PROPERTY_X86_FEATURE_1_IBT
is set on all relocatable inputs.
* elf64-x86-64.c (elf_x86_64_lazy_ibt_plt_entry): New.
(elf_x32_lazy_ibt_plt_entry): Likewise.
(elf_x86_64_non_lazy_ibt_plt_entry): Likewise.
(elf_x32_non_lazy_ibt_plt_entry): Likewise.
(elf_x86_64_eh_frame_lazy_ibt_plt): Likewise.
(elf_x32_eh_frame_lazy_ibt_plt): Likewise.
(elf_x86_64_lazy_ibt_plt): Likewise.
(elf_x32_lazy_ibt_plt): Likewise.
(elf_x86_64_non_lazy_ibt_plt): Likewise.
(elf_x32_non_lazy_ibt_plt): Likewise.
(elf_x86_64_get_synthetic_symtab): Support the second PLT.
(elf_x86_64_parse_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND.
(elf_x86_64_merge_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_1_AND. If info->ibt is set, turn
on GNU_PROPERTY_X86_FEATURE_1_IBT
(elf_x86_64_link_setup_gnu_properties): If info->ibt is set,
turn on GNU_PROPERTY_X86_FEATURE_1_IBT. Use IBT-enabled PLT
for info->ibtplt, info->ibt or GNU_PROPERTY_X86_FEATURE_1_IBT
is set on all relocatable inputs.
binutils/
* readelf.c (decode_x86_feature): New.
(print_gnu_property_note): Call decode_x86_feature on
GNU_PROPERTY_X86_FEATURE_1_AND.
* testsuite/binutils-all/i386/empty.d: New file.
* testsuite/binutils-all/i386/empty.s: Likewise.
* testsuite/binutils-all/i386/ibt.d: Likewise.
* testsuite/binutils-all/i386/ibt.s: Likewise.
* testsuite/binutils-all/x86-64/empty-x32.d: Likewise.
* testsuite/binutils-all/x86-64/empty.d: Likewise.
* testsuite/binutils-all/x86-64/empty.s: Likewise.
* testsuite/binutils-all/x86-64/ibt-x32.d: Likewise.
* testsuite/binutils-all/x86-64/ibt.d: Likewise.
* testsuite/binutils-all/x86-64/ibt.s: Likewise.
include/
* bfdlink.h (bfd_link_info): Add ibtplt and ibt.
* elf/common.h (GNU_PROPERTY_X86_FEATURE_1_AND): New.
(GNU_PROPERTY_X86_FEATURE_1_IBT): Likewise.
ld/
* Makefile.am (ELF_X86_DEPS): Add $(srcdir)/emulparams/cet.sh.
* Makefile.in: Regenerated.
* NEWS: Mention GNU_PROPERTY_X86_FEATURE_1_IBT, -z ibtplt
and -z ibt.
* emulparams/cet.sh: New file.
* testsuite/ld-i386/ibt-plt-1.d: Likewise.
* testsuite/ld-i386/ibt-plt-1.s: Likewise.
* testsuite/ld-i386/ibt-plt-2.s: Likewise.
* testsuite/ld-i386/ibt-plt-2a.d: Likewise.
* testsuite/ld-i386/ibt-plt-2b.d: Likewise.
* testsuite/ld-i386/ibt-plt-2c.d: Likewise.
* testsuite/ld-i386/ibt-plt-2d.d: Likewise.
* testsuite/ld-i386/ibt-plt-3.s: Likewise.
* testsuite/ld-i386/ibt-plt-3a.d: Likewise.
* testsuite/ld-i386/ibt-plt-3b.d: Likewise.
* testsuite/ld-i386/ibt-plt-3c.d: Likewise.
* testsuite/ld-i386/ibt-plt-3d.d: Likewise.
* testsuite/ld-i386/plt-main-ibt.dd: Likewise.
* testsuite/ld-i386/plt-pie-ibt.dd: Likewise.
* testsuite/ld-i386/property-x86-empty.s: Likewise.
* testsuite/ld-i386/property-x86-ibt.s: Likewise.
* testsuite/ld-i386/property-x86-ibt1a.d: Likewise.
* testsuite/ld-i386/property-x86-ibt1b.d: Likewise.
* testsuite/ld-i386/property-x86-ibt2.d: Likewise.
* testsuite/ld-i386/property-x86-ibt3a.d: Likewise.
* testsuite/ld-i386/property-x86-ibt3b.d: Likewise.
* testsuite/ld-i386/property-x86-ibt4.d: Likewise.
* testsuite/ld-i386/property-x86-ibt5.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-1-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-1.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-1.s: Likewise.
* testsuite/ld-x86-64/ibt-plt-2.s: Likewise.
* testsuite/ld-x86-64/ibt-plt-2a-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2a.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2b-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2b.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2c-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2c.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2d-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-2d.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3.s: Likewise.
* testsuite/ld-x86-64/ibt-plt-3a-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3a.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3b-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3b.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3c-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3c.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3d-x32.d: Likewise.
* testsuite/ld-x86-64/ibt-plt-3d.d: Likewise.
* testsuite/ld-x86-64/plt-main-ibt-now.rd: Likewise.
* testsuite/ld-x86-64/plt-main-ibt-x32.dd: Likewise.
* testsuite/ld-x86-64/plt-main-ibt.dd: Likewise.
* testsuite/ld-x86-64/property-x86-empty.s: Likewise.
* testsuite/ld-x86-64/property-x86-ibt.s: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1a-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1a.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1b-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt1b.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt2-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt2.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3a-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3a.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3b-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt3b.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt4-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt4.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt5-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-ibt5.d: Likewise.
* emulparams/elf32_x86_64.sh: Source emulparams/cet.sh.
(TINY_READONLY_SECTION): Add .plt.sec.
* emulparams/elf_i386.sh: Likewise.
* emulparams/elf_x86_64.sh: Source emulparams/cet.sh.
* ld.texinfo: Document -z ibtplt and -z ibt.
* testsuite/ld-i386/i386.exp: Run IBT and IBT PLT tests.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-x86-64/pr21481b.S (check): Updated for x32.
2017-06-22 20:44:37 +08:00
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* Support for -z ibtplt in the x86 ELF linker to generate IBT-enabled
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PLT.
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* Support for -z ibt in the x86 ELF linker to generate IBT-enabled
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PLT as well as GNU_PROPERTY_X86_FEATURE_1_IBT in ELF GNU program
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properties.
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Support ELF SHF_GNU_MBIND and PT_GNU_MBIND_XXX
Mark an ALLOC section, which should be placed in special memory area,
with SHF_GNU_MBIND. Its sh_info field indicates the special memory
type. GNU_MBIND section names start with ".mbind" so that they are
placed as orphan sections by linker. All input GNU_MBIND sections
with the same sh_type, sh_flags and sh_info are placed in one output
GNU_MBIND section. In executable and shared object, create a
GNU_MBIND segment for each GNU_MBIND section and its segment type is
PT_GNU_MBIND_LO plus the sh_info value. Each GNU_MBIND segment is
aligned at page boundary.
The assembler syntax:
.section .mbind.foo,"adx",%progbits
^ 0: Special memory type.
|
'd' for SHF_GNU_MBIND.
.section .mbind.foo,"adx",%progbits,0x1
^ 1: Special memory type.
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'd' for SHF_GNU_MBIND.
.section .mbind.bar,"adG",%progbits,.foo_group,comdat,0x2
^ 2: Special memory type.
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'd' for SHF_GNU_MBIND.
bfd/
* elf.c (get_program_header_size): Add a GNU_MBIND segment for
each GNU_MBIND section and align GNU_MBIND section to page size.
(_bfd_elf_map_sections_to_segments): Create a GNU_MBIND
segment for each GNU_MBIND section.
(_bfd_elf_init_private_section_data): Copy sh_info from input
for GNU_MBIND section.
binutils/
* NEWS: Mention support for ELF SHF_GNU_MBIND and
PT_GNU_MBIND_XXX.
* readelf.c (get_segment_type): Handle PT_GNU_MBIND_XXX.
(get_elf_section_flags): Handle SHF_GNU_MBIND.
(process_section_headers): Likewise.
* testsuite/binutils-all/mbind1.s: New file.
* testsuite/binutils-all/objcopy.exp: Run readelf test on
mbind1.s.
gas/
* NEWS: Mention support for ELF SHF_GNU_MBIND.
* config/obj-elf.c (section_match): New.
(get_section): Match both sh_info and group name.
(obj_elf_change_section): Add argument for sh_info. Pass both
sh_info and group name to get_section. Issue an error for
SHF_GNU_MBIND section without SHF_ALLOC. Set sh_info.
(obj_elf_parse_section_letters): Set SHF_GNU_MBIND for 'd'.
(obj_elf_section): Support SHF_GNU_MBIND section info.
* config/obj-elf.h (obj_elf_change_section): Add argument for
sh_info.
* config/tc-arm.c (start_unwind_section): Pass 0 as sh_info to
obj_elf_change_section.
* config/tc-ia64.c (obj_elf_vms_common): Likewise.
* config/tc-microblaze.c (microblaze_s_data): Likewise.
(microblaze_s_sdata): Likewise.
(microblaze_s_rdata): Likewise.
(microblaze_s_bss): Likewise.
* config/tc-mips.c (s_change_section): Likewise.
* config/tc-msp430.c (msp430_profiler): Likewise.
* config/tc-rx.c (parse_rx_section): Likewise.
* config/tc-tic6x.c (tic6x_start_unwind_section): Likewise.
* doc/as.texinfo: Document 'd' for SHF_GNU_MBIND.
* testsuite/gas/elf/elf.exp: Run section12a, section12b and
section13.
* testsuite/gas/elf/section10.d: Updated.
* testsuite/gas/elf/section10.s: Likewise.
* testsuite/gas/elf/section12.s: New file.
* testsuite/gas/elf/section12a.d: Likewise.
* testsuite/gas/elf/section12b.d: Likewise.
* testsuite/gas/elf/section13.l: Likewise.
* testsuite/gas/elf/section13.d: Likewise.
* testsuite/gas/elf/section13.s: Likewise.
include/
* elf/common.h (PT_GNU_MBIND_NUM): New.
(PT_GNU_MBIND_LO): Likewise.
(PT_GNU_MBIND_HI): Likewise.
(SHF_GNU_MBIND): Likewise.
ld/
* NEWS: Mention support for ELF SHF_GNU_MBIND and
PT_GNU_MBIND_XXX.
* emultempl/elf32.em (gld${EMULATION_NAME}_place_orphan): Place
input GNU_MBIND sections with the same type, attributes and
sh_info field into a single output GNU_MBIND section.
* testsuite/ld-elf/elf.exp: Run mbind2a and mbind2b.
* testsuite/ld-elf/mbind1.s: New file.
* testsuite/ld-elf/mbind1a.d: Likewise.
* testsuite/ld-elf/mbind1b.d: Likewise.
* testsuite/ld-elf/mbind1c.d: Likewise.
* testsuite/ld-elf/mbind2a.s: Likewise.
* testsuite/ld-elf/mbind2b.c: Likewise.
2017-04-05 00:05:48 +08:00
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* Add support for ELF SHF_GNU_MBIND and PT_GNU_MBIND_XXX.
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2017-04-03 23:03:14 +08:00
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* Add support for ELF GNU program properties.
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2016-12-30 18:39:49 +08:00
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* Add support for the Texas Instruments PRU processor.
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2017-01-26 18:33:23 +08:00
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* When configuring for arc*-*-linux* targets the default linker emulation will
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change if --with-cpu=nps400 is used at configure time.
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ld: better handling of lma region for orphan sections
When picking an lma_region for an orphan section we currently create a
new lang_output_section_statement_type and then populate this with the
orphan section.
The problem is that the lang_output_section_statement_type has a prev
pointer that links back to the previous output section. For non-orphan
output sections, that are created in linker script order, the prev
pointer will point to the output section that appears previous in linker
script order, as you'd probably expect.
The problem is that orphan sections are placed after processing the
linker script, and so, in the case of an output section created for an
orphan input section, the prev pointer actually points to the last
output section created.
This causes some unexpected behaviour when the orphan section is not
placed after the last non-orphan section that was created.
For example, consider this linker script:
MEMORY {
TEXT : ORIGIN = 0x200, LENGTH = 0x10
RODATA : ORIGIN = 0x400, LENGTH = 0x10
}
SECTIONS {
.text : {*(.text) } AT>TEXT
.data : AT(0x300) { *(.data) }
.rodata : { *(.rodata) } AT>RODATA
}
If we are processing an orphan section '.data.1' and decide to place
this after '.data', then the output section created will have a prev
pointer that references the '.rodata' output section. The result of
this is that '.data.1' will actually be assigned to the RODATA lma
region, which is probably not the expected behaviour.
The reason why '.data.1' is placed into the lma region of the '.rodata'
section is that lma region propagation is done at the time we create the
output section, based on the previous output section pointer, which is
really just a last-output-section-created pointer at that point in time,
though the prev point is fixed up later to reflect the true order of the
output sections.
The solution I propose in this commit is to move the propagation of lma
regions into a separate pass of the linker, rather than performing this
as part of the enter/exit of output sections during linker script
parsing.
During this later phase we have all of the output sections to hand, and
the prev/next points have been fixed up by this point to reflect the
actual placement ordering.
There's a new test to cover this issue that passes on a range of
targets, however, some targets generate additional sections, or have
stricter memory region size requirements that make it harder to come
up with a generic pass pattern, that still tests the required
features. For now I've set the test to ignore these targets.
ld/ChangeLog:
* ldlang.c (lang_leave_output_section_statement): Move lma_region
logic to...
(lang_propagate_lma_regions): ...this new function.
(lang_process): Call new function.
* testsuite/ld-elf/orphan-9.d: New file.
* testsuite/ld-elf/orphan-9.ld: New file.
* testsuite/ld-elf/orphan-9.s: New file.
* NEWS: Mention change in behaviour.
2017-01-18 03:12:54 +08:00
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* Improve assignment of LMAs to orphan sections in some edge cases where a
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mixture of both AT>LMA_REGION and AT(LMA) are used.
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ld: Track changes to default region LMA even for empty sections
Given a linker script fragment like this:
SECTIONS {
. = 0x1000;
.text : AT(0x100) { *(.text) }
.data : AT(0x200) { *(.data) }
.rodata : AT(0x300) { *(.rodata) }
}
and an input file containing sections, '.text', '.data.1', and
'.rodata', then we'd expect the linker to place '.text' and '.rodata' in
the obvious way, and the '.data.1' orphan section would be located after
the '.data' section (assuming similar section properties).
Further, I believe that the expectation would be that the LMA for the
orphan '.data.1' section would start from 0x200 (as there is no '.data'
content).
However, right now, the LMA for '.data.1' would be 0x101, following on
from the '.text' section, this is because the change in LMA for the
'.data' section is not noticed by the linker, if there's no content in
the '.data' section.
What can be even more confusing to a user (though the cause is obvious
once you understand what's going on) is that adding some content to
'.data' will cause the orphan '.data.1' to switch to an LMA based off of
0x200.
This commit changes the behaviour so that an empty section that is in
the default lma region, and sets its lma, will adjust the lma of the
default region, this change will then be reflected in following sections
within the default lma memory region.
There's a new test to cover this issue that passes on a range of
targets, however, some targets generate additional sections, or have
stricter memory region size requirements that make it harder to come
up with a generic pass pattern, that still tests the required
features. For now I've set the test to ignore these targets.
ld/ChangeLog:
* ldlang.c (lang_size_sections_1): Shortcut loop only after
tracking changes to the default regions LMA.
* testsuite/ld-elf/orphan-9.ld: Extend header comment.
* testsuite/ld-elf/orphan-10.d: New file.
* testsuite/ld-elf/orphan-10.s: New file.
* NEWS: Mention change in behaviour.
2017-01-18 03:13:29 +08:00
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* Orphan sections placed after an empty section that has an AT(LMA) will now
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take an load memory address starting from LMA.
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ld: Allow section groups to be resolved as part of a relocatable link
This commit adds a new linker feature: the ability to resolve section
groups as part of a relocatable link.
Currently section groups are automatically resolved when performing a
final link, and are carried through when performing a relocatable link.
By carried through this means that one copy of each section group (from
all the copies that might be found in all the input files) is placed
into the output file. Sections that are part of a section group will
not match input section specifiers within a linker script and are
forcibly kept as separate sections.
There is a slight resemblance between section groups and common
section. Like section groups, common sections are carried through when
performing a relocatable link, and resolved (allocated actual space)
only at final link time.
However, with common sections there is an ability to force the linker to
allocate space for the common sections when performing a relocatable
link, there's currently no such ability for section groups.
This commit adds such a mechanism. This new facility can be accessed in
two ways, first there's a command line switch --force-group-allocation,
second, there's a new linker script command FORCE_GROUP_ALLOCATION. If
one of these is used when performing a relocatable link then the linker
will resolve the section groups as though it were performing a final
link, the section group will be deleted, and the members of the group
will be placed like normal input sections. If there are multiple copies
of the group (from multiple input files) then only one copy of the group
members will be placed, the duplicate copies will be discarded.
Unlike common sections that have the --no-define-common command line
flag, and INHIBIT_COMMON_ALLOCATION linker script command there is no
way to prevent group resolution during a final link, this is because the
ELF gABI specifically prohibits the presence of SHT_GROUP sections in a
fully linked executable. However, the code as written should make
adding such a feature trivial, setting the new resolve_section_groups
flag to false during a final link should work as you'd expect.
bfd/ChangeLog:
* elf.c (_bfd_elf_make_section_from_shdr): Don't initially mark
SEC_GROUP sections as SEC_EXCLUDE.
(bfd_elf_set_group_contents): Replace use of abort with an assert.
(assign_section_numbers): Use resolve_section_groups flag instead
of relocatable link type.
(_bfd_elf_init_private_section_data): Use resolve_section_groups
flag instead of checking the final_link flag for part of the
checks in here. Fix white space as a result.
* elflink.c (elf_link_input_bfd): Use resolve_section_groups flag
instead of relocatable link type.
(bfd_elf_final_link): Likewise.
include/ChangeLog:
* bfdlink.h (struct bfd_link_info): Add new resolve_section_groups
flag.
ld/ChangeLog:
* ld.h (struct args_type): Add force_group_allocation field.
* ldgram.y: Add support for FORCE_GROUP_ALLOCATION.
* ldlex.h: Likewise.
* ldlex.l: Likewise.
* lexsup.c: Likewise.
* ldlang.c (unique_section_p): Check resolve_section_groups flag
not the relaxable link flag.
(lang_add_section): Discard section groups when we're resolving
groups. Clear the SEC_LINK_ONCE flag if we're resolving section
groups.
* ldmain.c (main): Initialise resolve_section_groups flag in
link_info based on command line flags.
* testsuite/ld-elf/group11.d: New file.
* testsuite/ld-elf/group12.d: New file.
* testsuite/ld-elf/group12.ld: New file.
* NEWS: Mention new features.
* ld.texinfo (Options): Document --force-group-allocation.
(Miscellaneous Commands): Document FORCE_GROUP_ALLOCATION.
2017-03-23 01:27:49 +08:00
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* Section groups can now be resolved (the group deleted and the group members
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placed like normal sections) at partial link time either using the new linker
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option --force-group-allocation or by placing FORCE_GROUP_ALLOCATION into the
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linker script.
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2016-12-23 16:43:13 +08:00
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Changes in 2.28:
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2016-09-20 21:21:05 +08:00
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* The EXCLUDE_FILE linker script construct can now be applied outside of the
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section list in order for the exclusions to apply over all input sections in
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the list.
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2016-11-02 00:45:57 +08:00
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* Add support for the RISC-V architecture.
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2016-07-16 00:49:08 +08:00
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2018-07-02 18:18:24 +08:00
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* The command-line option --no-eh-frame-hdr can now be used in ELF based
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2016-09-14 17:42:10 +08:00
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linkers to disable the automatic generation of .eh_frame_hdr sections.
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2016-08-26 17:59:26 +08:00
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* Add --in-implib=<infile> to the ARM linker to enable specifying a set of
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Secure Gateway veneers that must exist in the output import library specified
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by --out-implib=<outfile> and the address they must have. As such,
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--in-implib is only supported in combination with --cmse-implib.
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2016-07-16 00:49:08 +08:00
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* Extended the --out-implib=<file> option, previously restricted to x86 PE
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targets, to any ELF based target. This allows the generation of an import
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library for an ELF executable, which can then be used by another application
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to link against the executable.
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2016-07-01 16:57:46 +08:00
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Changes in 2.27:
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2016-06-22 20:37:24 +08:00
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* Add a configure option --enable-relro to decide whether -z relro should
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be enabled in ELF linker by default. Default to yes for all Linux
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2017-10-03 12:40:28 +08:00
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targets except FRV, HPPA, IA64 and MIPS. Note that -z relro can increase
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disk and memory size.
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2016-06-22 20:37:24 +08:00
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2016-03-16 02:07:06 +08:00
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* Support for -z noreloc-overflow in the x86-64 ELF linker to disable
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relocation overflow check.
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Properly implement STT_COMMON
The BFD configure option, --enable-elf-stt-common, can't be to used to
verify STT_COMMON implementation with the normal binutils build. Instead,
this patch removes it from BFD. It adds --elf-stt-common=[no|yes] to ELF
assembler/objcopy and adds -z common/-z nocommon to ld.
A configure option, --enable-elf-stt-common, is added to gas to specify
whether ELF assembler should generate common symbols with the STT_COMMON
type by default.
Since BSF_KEEP_G is never used, it is renamed to BSF_ELF_COMMON for ELF
common symbols.
bfd/
PR ld/19645
* bfd.c (bfd): Change flags to 20 bits.
(BFD_CONVERT_ELF_COMMON): New.
(BFD_USE_ELF_STT_COMMON): Likewise.
(BFD_FLAGS_SAVED): Add BFD_CONVERT_ELF_COMMON and
BFD_USE_ELF_STT_COMMON.
(BFD_FLAGS_FOR_BFD_USE_MASK): Likewise.
* configure.ac: Remove --enable-elf-stt-common.
* elf.c (swap_out_syms): Choose STT_COMMON or STT_OBJECT for
common symbol depending on BFD_CONVERT_ELF_COMMON and
BFD_USE_ELF_STT_COMMON.
* elfcode.h (elf_slurp_symbol_table): Set BSF_ELF_COMMON for
STT_COMMON.
* elflink.c (bfd_elf_link_mark_dynamic_symbol): Also check
STT_COMMON.
(elf_link_convert_common_type): New function.
(elf_link_output_extsym): Choose STT_COMMON or STT_OBJECT for
common symbol depending on BFD_CONVERT_ELF_COMMON and
BFD_USE_ELF_STT_COMMON. Set sym.st_info after sym.st_shndx.
* elfxx-target.h (TARGET_BIG_SYM): Add BFD_CONVERT_ELF_COMMON
and BFD_USE_ELF_STT_COMMON to object_flags.
(TARGET_LITTLE_SYM): Likewise.
* syms.c (BSF_KEEP_G): Renamed to ...
(BSF_ELF_COMMON): This.
* bfd-in2.h: Regenerated.
* config.in: Likewise.
* configure: Likewise.
binutils/
PR ld/19645
* NEWS: Mention --elf-stt-common= for objcopy.
* doc/binutils.texi: Document --elf-stt-common= for objcopy.
* objcopy.c (do_elf_stt_common): New.
(command_line_switch): Add OPTION_ELF_STT_COMMON.
(copy_options): Add --elf-stt-common=.
(copy_usage): Add --elf-stt-common=.
(copy_object): Also check do_elf_stt_common for ELF targets.
(copy_file): Handle do_elf_stt_common.
(copy_main): Handle OPTION_ELF_STT_COMMON.
* readelf.c (apply_relocations): Support STT_COMMON.
* testsuite/binutils-all/common-1.s: New file.
* testsuite/binutils-all/common-1a.d: Likewise.
* testsuite/binutils-all/common-1b.d: Likewise.
* testsuite/binutils-all/common-1c.d: Likewise.
* testsuite/binutils-all/common-1d.d: Likewise.
* testsuite/binutils-all/common-1e.d: Likewise.
* testsuite/binutils-all/common-1f.d: Likewise.
* testsuite/binutils-all/common-2.s: Likewise.
* testsuite/binutils-all/common-2a.d: Likewise.
* testsuite/binutils-all/common-2b.d: Likewise.
* testsuite/binutils-all/common-2c.d: Likewise.
* testsuite/binutils-all/common-2d.d: Likewise.
* testsuite/binutils-all/common-2e.d: Likewise.
* testsuite/binutils-all/common-2f.d: Likewise.
* testsuite/binutils-all/objcopy.exp
(objcopy_test_elf_common_symbols): New proc.
Run objcopy_test_elf_common_symbols for ELF targets
gas/
PR ld/19645
* NEWS: Mention --enable-elf-stt-common and --elf-stt-common=
for ELF assemblers.
* as.c (flag_use_elf_stt_common): New.
(show_usage): Add --elf-stt-common=.
(option_values): Add OPTION_ELF_STT_COMMON.
(std_longopts): Add --elf-stt-common=.
(parse_args): Handle --elf-stt-common=.
* as.h (flag_use_elf_stt_common): New.
* config.in: Regenerated.
* configure: Likewise.
* configure.ac: Add --enable-elf-stt-common and define
DEFAULT_GENERATE_ELF_STT_COMMON.
* gas/write.c (write_object_file): Set BFD_CONVERT_ELF_COMMON
and BFD_USE_ELF_STT_COMMON if flag_use_elf_stt_common is set.
* doc/as.texinfo: Document --elf-stt-common=.
* testsuite/gas/elf/common3.s: New file.
* testsuite/gas/elf/common3a.d: Likewise.
* testsuite/gas/elf/common3b.d: Likewise.
* testsuite/gas/elf/common4.s: Likewise.
* testsuite/gas/elf/common4a.d: Likewise.
* testsuite/gas/elf/common4b.d: Likewise.
* testsuite/gas/i386/dw2-compress-3b.d: Likewise.
* testsuite/gas/i386/dw2-compressed-3b.d: Likewise.
* testsuite/gas/elf/elf.exp: Run common3a, common3b, common4a
and common4b.
* testsuite/gas/i386/dw2-compress-3.d: Renamed to ...
* testsuite/gas/i386/dw2-compress-3a.d: This. Pass
--elf-stt-common=no to as.
* testsuite/gas/i386/dw2-compressed-3.d: Renamed to ...
* testsuite/gas/i386/dw2-compressed-3a.d: This. Pass
--elf-stt-common=no to as.
* testsuite/gas/i386/i386.exp: Run dw2-compress-3a,
dw2-compress-3b, dw2-compressed-3a and dw2-compressed-3b instead
of dw2-compress-3 and dw2-compressed-3.
include/
PR ld/19645
* bfdlink.h (bfd_link_elf_stt_common): New enum.
(bfd_link_info): Add elf_stt_common.
ld/
PR ld/19645
* NEWS: Mention -z common/-z nocommon for ELF targets.
* emultempl/elf32.em (gld${EMULATION_NAME}_handle_option): Handle
-z common and -z nocommon.
* ld.texinfo: Document -z common/-z nocommon.
* lexsup.c (elf_shlib_list_options): Add -z common/-z nocommon.
* testsuite/ld-elf/tls_common.exp: Test --elf-stt-common=no and
--elf-stt-common=yes with assembler.
* testsuite/ld-elfcomm/common-1.s: New file.
* testsuite/ld-elfcomm/common-1a.d: Likewise.
* testsuite/ld-elfcomm/common-1b.d: Likewise.
* testsuite/ld-elfcomm/common-1c.d: Likewise.
* testsuite/ld-elfcomm/common-1d.d: Likewise.
* testsuite/ld-elfcomm/common-1e.d: Likewise.
* testsuite/ld-elfcomm/common-1f.d: Likewise.
* testsuite/ld-elfcomm/common-2.s: Likewise.
* testsuite/ld-elfcomm/common-2a.d: Likewise.
* testsuite/ld-elfcomm/common-2b.d: Likewise.
* testsuite/ld-elfcomm/common-2c.d: Likewise.
* testsuite/ld-elfcomm/common-2d.d: Likewise.
* testsuite/ld-elfcomm/common-2e.d: Likewise.
* testsuite/ld-elfcomm/common-2f.d: Likewise.
* testsuite/ld-elfcomm/common-3a.rd: Likewise.
* testsuite/ld-elfcomm/common-3b.rd: Likewise.
* testsuite/ld-i386/pr19645.d: Likewise.
* testsuite/ld-i386/pr19645.s: Likewise.
* testsuite/ld-x86-64/largecomm-1.s: Likewise.
* testsuite/ld-x86-64/largecomm-1a.d: Likewise.
* testsuite/ld-x86-64/largecomm-1b.d: Likewise.
* testsuite/ld-x86-64/largecomm-1c.d: Likewise.
* testsuite/ld-x86-64/largecomm-1d.d: Likewise.
* testsuite/ld-x86-64/largecomm-1e.d: Likewise.
* testsuite/ld-x86-64/largecomm-1f.d: Likewise.
* testsuite/ld-x86-64/pr19645.d: Likewise.
* testsuite/ld-x86-64/pr19645.s: Likewise.
* testsuite/ld-elfcomm/elfcomm.exp: Test --elf-stt-common=yes
with assembler.
(assembler_generates_commons): Removed.
Run -z common/-z nocommon tests. Run *.d tests.
* testsuite/ld-i386/i386.exp: Run pr19645.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-x86-64/dwarfreloc.exp: Test --elf-stt-common with
assembler. Test STT_COMMON with readelf.
2016-02-23 01:18:52 +08:00
|
|
|
|
* Add -z common/-z nocommon options for ELF targets to control whether to
|
|
|
|
|
|
convert common symbols to the STT_COMMON type during a relocatable link.
|
|
|
|
|
|
|
2016-02-26 20:16:15 +08:00
|
|
|
|
* Support for -z nodynamic-undefined-weak in the x86 ELF linker, which
|
|
|
|
|
|
avoids dynamic relocations against undefined weak symbols in executable.
|
|
|
|
|
|
|
2016-04-14 18:49:53 +08:00
|
|
|
|
* The NOCROSSREFSTO command was added to the linker script language.
|
|
|
|
|
|
|
2016-05-03 18:59:37 +08:00
|
|
|
|
* Add --no-apply-dynamic-relocs to the AArch64 linker to do not apply link-time
|
|
|
|
|
|
values for dynamic relocations.
|
|
|
|
|
|
|
2015-11-13 16:30:08 +08:00
|
|
|
|
Changes in 2.26:
|
|
|
|
|
|
|
2015-10-27 21:20:33 +08:00
|
|
|
|
* Add --fix-stm32l4xx-629360 to the ARM linker to enable a link-time
|
|
|
|
|
|
workaround for a bug in the bus matrix / memory controller for some of
|
|
|
|
|
|
the STM32 Cortex-M4 based products (STM32L4xx)
|
2009-09-04 16:23:49 +08:00
|
|
|
|
|
2015-10-21 20:12:19 +08:00
|
|
|
|
* Add a configure option --enable-compressed-debug-sections={all,ld} to
|
|
|
|
|
|
decide whether DWARF debug sections should be compressed by default.
|
|
|
|
|
|
|
2015-10-07 21:20:19 +08:00
|
|
|
|
* Add support for the ARC EM/HS, and ARC600/700 architectures.
|
|
|
|
|
|
|
Add experimental support for --gc-sections with COFF and PE based targets.
PR ld/11539
bfd * coffcode.h (coff_bfd_gc_sections): Define default
to bfd_coff_gc_sections function.
* cofflink.c (init_reloc_cookie): Copy and adjust coff
related code about gc-sections from elflink.c to here.
(fini_reloc_cookie): Likewise.
(init_reloc_cookie_rels): Likewise.
(fini_reloc_cookie_rels): Likewise.
(init_reloc_cookie_for_section): Likewise.
(fini_reloc_cookie_for_section): Likewise.
(_bfd_coff_gc_mark_hook): Likewise.
(_bfd_coff_gc_mark_rsec): Likewise.
(_bfd_coff_gc_mark_reloc): Likewise.
(_bfd_coff_gc_mark): Likewise.
(_bfd_coff_gc_mark_extra_sections): Likewise.
(coff_gc_sweep_symbol_info): Likewise.
(coff_gc_sweep_symbol): Likewise.
(gc_sweep_hook_fn): Likewise.
(coff_gc_sweep): Likewise.
(bfd_coff_gc_sections): Likewise.
(_bfd_coff_gc_keep): Likewise.
* libcoff.h (coff_reloc_cookie): New struct.
(bfd_coff_gc_sections): New prototype.
(coff_gc_mark_hook_fn): New type.
ld * scripttempl/pep.sc: Mark .idata*, .CRT*, .tls*,
.rsrc*, .init, .ctor*, .dtor*, .fini, .jcr,
.eh_frame, .pdata. .xdata, and .gcc_except_table sections
as KEEP.
* scripttempl/pe.sc: Likewise.
2015-07-03 22:50:29 +08:00
|
|
|
|
* Experimental support for linker garbage collection (--gc-sections)
|
|
|
|
|
|
has been enabled for COFF and PE based targets.
|
|
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* New command-line option for ELF targets to compress DWARF debug
|
2015-04-15 20:25:58 +08:00
|
|
|
|
sections, --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi].
|
|
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* New command-line option, --orphan-handling=[place|warn|error|discard], to
|
ld: Extend options for altering orphan handling behaviour.
Replace the options --warn-orphan and --no-warn-orphan with a single
option --orphan-handling=MODE, where mode can be place, warn, error, and
discard.
Mode 'place' is the default, and is the current behaviour, placing the
orphan section into a suitable output section.
Mode 'warn' is the same as '--warn-orphan'. The orphan is also placed
using the same algorithm as for 'place'.
Mode 'error' is the same as '--warn-orphan' and '--fatal-warnings'.
Mode 'discard' assigns all output sections to the /DISCARD/ section.
ld/ChangeLog:
* ld.h (enum orphan_handling_enum): New.
(ld_config_type): Remove warn_orphan, add orphan_handling.
* ldemul.c (ldemul_place_orphan): Remove warning about orphan
sections.
* ldlang.c (ldlang_place_orphan): New function.
(lang_place_orphans): Call ldlang_place_orphan.
* ldlex.h (enum option_values): Remove OPTION_WARN_ORPHAN and
OPTION_NO_WARN_ORPHAN, add OPTION_ORPHAN_HANDLING.
* lexsup.c (ld_options): Remove 'warn-orphan' and
'no-warn-orphan', add 'orphan-handling'.
(parse_args): Remove handling for OPTION_WARN_ORPHAN and
OPTION_NO_WARN_ORPHAN, add handling for OPTION_ORPHAN_HANDLING.
* NEWS: Replace text about --warn-orphan with --orphan-handling.
* ld.texinfo (Options): Remove --warn-orphan entry and add
entry on --orphan-handling.
(Orphan Sections): Add reference to relevant command line options.
ld/testsuite/ChangeLog:
* ld-elf/elf.exp: Switch to rely on run_dump_test.
* ld-elf/orphan-5.l: Update expected output.
* ld-elf/orphan-5.d: New file.
* ld-elf/orphan-6.d: New file.
* ld-elf/orphan-6.l: New file.
* ld-elf/orphan-7.d: New file.
* ld-elf/orphan-7.map: New file.
* ld-elf/orphan-8.d: New file.
* ld-elf/orphan-8.map: New file.
2015-07-29 02:20:37 +08:00
|
|
|
|
adjust how orphan sections are handled. The default is 'place' which gives
|
|
|
|
|
|
the current behaviour, 'warn' and 'error' issue a warning or error
|
|
|
|
|
|
respectively when orphan sections are found, and 'discard' will discard all
|
|
|
|
|
|
orphan sections.
|
2015-04-07 23:29:41 +08:00
|
|
|
|
|
2015-02-13 23:54:21 +08:00
|
|
|
|
* Add support for LLVM plugin.
|
|
|
|
|
|
|
2015-06-05 21:09:31 +08:00
|
|
|
|
* Add --print-memory-usage option to report memory blocks usage.
|
|
|
|
|
|
|
2015-07-16 01:37:30 +08:00
|
|
|
|
* Add --require-defined option, it's like --undefined except the new symbol
|
|
|
|
|
|
must be defined by the end of the link.
|
|
|
|
|
|
|
2014-10-14 15:49:47 +08:00
|
|
|
|
Changes in 2.25:
|
|
|
|
|
|
|
2014-06-26 19:18:39 +08:00
|
|
|
|
* PE binaries now once again contain real timestamps by default. To disable
|
|
|
|
|
|
the inclusion of a timestamp in a PE binary, use the --no-insert-timestamp
|
2018-07-02 18:18:24 +08:00
|
|
|
|
command-line option.
|
2014-06-26 19:18:39 +08:00
|
|
|
|
|
2014-04-22 22:57:47 +08:00
|
|
|
|
* Replace support for openrisc and or32 with support for or1k.
|
|
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* Add support for the --build-id command-line option to COFF based targets.
|
Add support for generating and inserting build IDs into COFF binaries.
* peXXigen.c (pe_print_debugdata): New function: Displays the
contents of the debug directory and decodes codeview entries.
(_bfd_XXi_swap_debugdir_in, _bfd_XXi_swap_debugdir_out)
(_bfd_XXi_slurp_codeview_record, _bfd_XXi_write_codeview_record):
Add functions for reading and writing debugdir and codeview
records.
* libpei.h (_bfd_XXi_swap_debugdir_in, _bfd_XXi_swap_debugdir_out)
(_bfd_XXi_write_codeview_record): Add prototypes and macros.
* libcoff-in.h (pe_tdata): Add build-id data.
* libcoff.h: Regenerate.
* coffcode.h (coff_write_object_contents): Run build_id
after_write_object_contents hook.
* pe.h (external_IMAGE_DEBUG_DIRECTORY, _CV_INFO_PDB70)
(_CV_INFO_PDB20): Add structures and constants for debug directory
and codeview records.
* internal.h (internal_IMAGE_DEBUG_DIRECTORY, CODEVIEW_INFO):
Add structures and constants for internal representation of debug
directory and codeview records.
* emultempl/elf32.em (id_note_section_size, read_hex, write_build_id):
Move code for parsing build-id option and calculating the build-id to...
* ldbuildid.c: New file.
* ldbuildid.h: New file.
* Makefile.am (CFILES, HFILES, OFILES, ld_new_SOURCES): Add new
files.
* Makefile.in: Regenerate.
* ld.texinfo: Update --build-id description to mention COFF
support.
* NEWS: Mention support for COFF build ids.
* emultempl/pe.em (gld${EMULATION_NAME}_handle_option):
(pecoff_checksum_contents, write_build_id, setup_build_id)
(gld_${EMULATION_NAME}_after_open): Handle and implement
build-id option.
* emultempl/pep.em: Likewise.
2014-04-08 17:59:43 +08:00
|
|
|
|
|
|
|
|
|
|
* x86/x86_64 pe-coff now supports the --build-id option.
|
|
|
|
|
|
|
2013-12-13 19:52:32 +08:00
|
|
|
|
* Add support for the Andes NDS32.
|
|
|
|
|
|
|
2013-09-18 18:39:38 +08:00
|
|
|
|
Changes in 2.24:
|
|
|
|
|
|
|
2013-08-15 15:30:15 +08:00
|
|
|
|
* Add LOG2CEIL() builtin function to the linker script language
|
|
|
|
|
|
|
2013-05-03 05:06:15 +08:00
|
|
|
|
* Add support for the Texas Instruments MSP430X processor.
|
|
|
|
|
|
|
2013-02-07 07:22:26 +08:00
|
|
|
|
* Add support for Altera Nios II.
|
|
|
|
|
|
|
2013-01-24 19:14:05 +08:00
|
|
|
|
* Add support for the V850E3V5 architecture.
|
|
|
|
|
|
|
2013-01-10 17:49:22 +08:00
|
|
|
|
* Add support for the Imagination Technologies Meta processor.
|
|
|
|
|
|
|
2013-01-19 01:43:58 +08:00
|
|
|
|
* --enable-new-dtags no longer generates old dtags in addition to new dtags.
|
|
|
|
|
|
|
* configure.ac (mips*-*-bsd*, mips*-*-ultrix*, mips*-*-osf*)
(mips*-*-ecoff*, mips*-*-pe*, mips*-*-irix* [v4 and earlier])
(mips*-*-lnews*, mips*-*-riscos*): Add gas and ld to noconfigdirs.
* configure: Regenerate.
gas/
* NEWS: Note removal of ECOFF support.
* doc/as.texinfo (--emulation): Update for the removal of MIPS ECOFF.
* Makefile.am (TARG_ENV_HFILES): Remove config/te-lnews.h.
(MULTI_CFILES): Remove config/e-mipsecoff.c.
* Makefile.in: Regenerate.
* configure.in: Remove MIPS ECOFF references.
(mips-sony-bsd*, mips-*-bsd*, mips-*-lnews*-ecoff, mips-*-*-ecoff):
Delete cases.
(mips-*-irix5*-*, mips*-*-linux*-*, mips*-*-freebsd*)
(mips*-*-kfreebsd*-gnu, mips-*-*-elf): Fold into...
(mips-*-*): ...this single case.
(mipsbecoff, mipslecoff, mipsecoff): Remove emulations. Expect
MIPS emulations to be e-mipself*.
* configure: Regenerate.
* configure.tgt (mips-sony-bsd*, mips-*-ultrix*, mips-*-osf*)
(mips-*-ecoff*, mips-*-pe*, mips-*-irix*, ips-*-lnews*, mips-*-riscos*)
(mips-*-sysv*): Remove coff and ecoff cases.
* as.c (mipsbecoff, mipslecoff, mipsecoff): Remove.
* ecoff.c: Remove reference to MIPS ECOFF.
* config/e-mipsecoff.c, config/te-lnews.h: Delete files.
* config/tc-mips.c (ECOFF_LITTLE_FORMAT): Delete.
(RDATA_SECTION_NAME, mips_target_form): Remove COFF and ECOFF cases.
(mips_hi_fixup): Tweak comment.
(append_insn): Require a howto.
(mips_after_parse_args): Remove OBJ_MAYBE_ECOFF code.
gas/testsuite/
* gas/all/gas.exp: Remove reference to mips-ecoff.
* gas/mips/branch-misc-1.d, gas/mips/branch-misc-2.d,
gas/mips/branch-misc-2-64.d, gas/mips/branch-misc-2pic.d,
gas/mips/branch-misc-2pic-64.d, gas/mips/branch-swap.d: Remove
skips for mips-*-ecoff.
ld/
* NEWS: Document the removal of MIPS ECOFF targets.
* ld.texinfo (--gpsize=@var{value}): Use MIPS ELF rather than
MIPS ECOFF as an example of a target that supports small data.
* ldmain.c (g_switch_value): Likewise.
* configure.tgt (mips*-*-pe, mips*-dec-ultrix*, mips*-dec-osf*)
(mips*-sgi-irix* [v4 and earlier], mips*el-*-ecoff*, mips*-*-ecoff*)
(mips*-*-bsd*, mips*-*-lnews*): Remove cases.
* Makefile.am (ALL_EMULATION_SOURCES): Remove emipsbig.c, emipsbsd.c,
emipsidt.c, emipsidtl.c, emipslit.c, emipslnews.c and emipspe.c.
(emipsbig.c, emipsbsd.c, emipsidt.c, emipsidtl.c, emipslit.c)
(emipslnews.c, emipspe.c): Delete rules.
* Makefile.in: Regenerate.
* emulparams/mipsbig.sh, emulparams/mipsbsd.sh, emulparams/mipsidt.sh,
emulparams/mipsidtl.sh, emulparams/mipslit.sh, emulparams/mipslnews.sh,
emulparams/mipspe.sh, emultempl/mipsecoff.em: Delete.
* emultempl/m68kcoff.em: Update comment to say that MIPS ECOFF support
has now been removed.
* emultempl/pe.em: Remove TARGET_IS_mipspe checks.
2013-06-23 00:44:16 +08:00
|
|
|
|
* Remove linker support for MIPS ECOFF targets.
|
|
|
|
|
|
|
2013-07-19 18:39:51 +08:00
|
|
|
|
* Add ALIGN_WITH_INPUT to the linker script language to force the alignment of
|
|
|
|
|
|
an output section to use the maximum alignment of all its input sections.
|
|
|
|
|
|
|
2012-07-27 16:13:03 +08:00
|
|
|
|
Changes in 2.23:
|
|
|
|
|
|
|
2012-10-19 04:40:39 +08:00
|
|
|
|
* Enable compressed debug section feature for x86/x86_64 pe-coff.
|
|
|
|
|
|
|
2012-08-22 15:35:36 +08:00
|
|
|
|
* Add support for the 64-bit ARM architecture: AArch64.
|
|
|
|
|
|
|
2012-07-10 14:50:57 +08:00
|
|
|
|
* Added SORT_NONE to the linker script language to disable section sorting.
|
|
|
|
|
|
|
2012-06-23 00:52:33 +08:00
|
|
|
|
* Add a linker-provided symbol when producing ELF output, '__ehdr_start'
|
|
|
|
|
|
to point to the ELF file header (and nearby program headers) in the
|
|
|
|
|
|
program's memory image.
|
|
|
|
|
|
|
2012-05-15 20:55:51 +08:00
|
|
|
|
* Add support for S12X processor.
|
|
|
|
|
|
|
Add support for PowerPC VLE.
2012-05-14 Catherine Moore <clm@codesourcery.com>
* NEWS: Mention PowerPC VLE port.
2012-05-14 James Lemke <jwlemke@codesourcery.com>
Catherine Moore <clm@codesourcery.com>
bfd/
* bfd.c (bfd_lookup_section_flags): Add section parm.
* ecoff.c (bfd_debug_section): Remove flag_info initializer.
* elf-bfd.h (bfd_elf_section_data): Move in section_flag_info.
(bfd_elf_lookup_section_flags): Add section parm.
* elf32-ppc.c (is_ppc_vle): New function.
(ppc_elf_modify_segment_map): New function.
(elf_backend_modify_segment_map): Define.
(has_vle_insns): New define.
* elf32-ppc.h (ppc_elf_modify_segment_map): Declare.
* elflink.c (bfd_elf_lookup_section_flags): Add return value & parm.
Move in logic to omit / include a section.
* libbfd-in.h (bfd_link_info): Add section parm.
(bfd_generic_lookup_section_flags): Likewise.
* reloc.c (bfd_generic_lookup_section_flags): Likewise.
* section.c (bfd_section): Move out section_flag_info.
(BFD_FAKE_SECTION): Remove flag_info initializer.
* targets.c (_bfd_lookup_section_flags): Add section parm.
2012-05-14 Catherine Moore <clm@codesourcery.com>
bfd/
* archures.c (bfd_mach_ppc_vle): New.
* bfd-in2.h: Regenerated.
* cpu-powerpc.c (bfd_powerpc_archs): New entry for vle.
* elf32-ppc.c (split16_format_type): New enumeration.
(ppc_elf_vle_split16): New function.
(HOWTO): Add entries for R_PPC_VLE relocations.
(ppc_elf_reloc_type_lookup): Handle PPC_VLE relocations.
(ppc_elf_section_flags): New function.
(ppc_elf_lookup_section_flags): New function.
(ppc_elf_section_processing): New function.
(ppc_elf_check_relocs): Handle PPC_VLE relocations.
(ppc_elf_relocation_section): Likewise.
(elf_backend_lookup_section_flags_hook): Define.
(elf_backend_section_flags): Define.
(elf_backend_section_processing): Define.
* elf32-ppc.h (ppc_elf_section_processing): Declare.
* libbfd.h: Regenerated.
* reloc.c (BFD_RELOC_PPC_VLE_REL8, BFD_RELOC_PPC_VLE_REL15,
BFD_RELOC_PPC_VLE_REL24, BFD_RELOC_PPC_VLE_LO16A,
BFD_RELOC_PPC_VLE_LO16D, BFD_RELOC_PPC_VLE_HI16A,
BFD_RELOC_PPC_VLE_HI16D, BFD_RELOC_PPC_VLE_HA16A,
BFD_RELOC_PPC_VLE_HA16D, BFD_RELOC_PPC_VLE_SDA21,
BFD_RELOC_PPC_VLE_SDA21_LO, BFD_RELOC_PPC_VLE_SDAREL_LO16A,
BFD_RELOC_PPC_VLE_SDAREL_LO16D, BFD_RELOC_PPC_VLE_SDAREL_HI16A,
BFD_RELOC_PPC_VLE_SDAREL_HI16D, BFD_RELOC_PPC_VLE_SDAREL_HA16A,
BFD_RELOC_PPC_VLE_SDAREL_HA16D): New bfd relocations.
2012-05-14 James Lemke <jwlemke@codesourcery.com>
gas/
* config/tc-ppc.c (insn_validate): New func of existing code to call..
(ppc_setup_opcodes): ..from 2 places here.
Revise for second (VLE) opcode table.
Add #ifdef'd code to print opcode tables.
2012-05-14 James Lemke <jwlemke@codesourcery.com>
gas/
* config/tc-ppc.c (ppc_setup_opcodes): Allow out-of-order
for the VLE conditional branches.
2012-05-14 Catherine Moore <clm@codesourcery.com>
Maciej W. Rozycki <macro@codesourcery.com>
Rhonda Wittels <rhonda@codesourcery.com>
gas/
* config/tc-ppc.c (PPC_VLE_SPLIT16A): New macro.
(PPC_VLE_SPLIT16D): New macro.
(PPC_VLE_LO16A): New macro.
(PPC_VLE_LO16D): New macro.
(PPC_VLE_HI16A): New macro.
(PPC_VLE_HI16D): New macro.
(PPC_VLE_HA16A): New macro.
(PPC_VLE_HA16D): New macro.
(PPC_APUINFO_VLE): New definition.
(md_chars_to_number): New function.
(md_parse_option): Check for combinations of little
endian and -mvle.
(md_show_usage): Document -mvle.
(ppc_arch): Recognize VLE.
(ppc_mach): Recognize bfd_mach_ppc_vle.
(ppc_setup_opcodes): Print the opcode table if
* config/tc-ppc.h (ppc_frag_check): Declare.
* doc/c-ppc.texi: Document -mvle.
* NEWS: Mention PowerPC VLE port.
2012-05-14 Catherine Moore <clm@codesourcery.com>
gas/
* config/tc-ppc.h (ppc_dw2_line_min_insn_length): Declare.
(DWARF2_LINE_MIN_INSN_LENGTH): Redefine.
* config/tc-ppc.c (ppc_dw2_line_min_insn_length): New.
* dwarf2dbg.c (scale_addr_delta): Handle values of 1
for DWARF2_LINE_MIN_INSN_LENGTH.
2012-05-14 Catherine Moore <clm@codesourcery.com>
Maciej W. Rozycki <macro@codesourcery.com>
Rhonda Wittels <rhonda@codesourcery.com>
gas/testsuite/
* gas/ppc/ppc.exp: Run new tests.
* gas/ppc/vle-reloc.d: New test.
* gas/ppc/vle-reloc.s: New test.
* gas/ppc/vle-simple-1.d: New test.
* gas/ppc/vle-simple-1.s: New test.
* gas/ppc/vle-simple-2.d: New test.
* gas/ppc/vle-simple-2.s: New test.
* gas/ppc/vle-simple-3.d: New test.
* gas/ppc/vle-simple-3.s: New test.
* gas/ppc/vle-simple-4.d: New test.
* gas/ppc/vle-simple-4.s: New test.
* gas/ppc/vle-simple-5.d: New test.
* gas/ppc/vle-simple-5.s: New test.
* gas/ppc/vle-simple-6.d: New test.
* gas/ppc/vle-simple-6.s: New test.
* gas/ppc/vle.d: New test.
* gas/ppc/vle.s: New test.
2012-05-14 James Lemke <jwlemke@codesourcery.com>
include/elf/
* ppc.h (SEC_PPC_VLE): Remove.
2012-05-14 Catherine Moore <clm@codesourcery.com>
James Lemke <jwlemke@codesourcery.com>
include/elf/
* ppc.h (R_PPC_VLE_REL8): New reloction.
(R_PPC_VLE_REL15): Likewise.
(R_PPC_VLE_REL24): Likewise.
(R_PPC_VLE_LO16A): Likewise.
(R_PPC_VLE_LO16D): Likewise.
(R_PPC_VLE_HI16A): Likewise.
(R_PPC_VLE_HI16D): Likewise.
(R_PPC_VLE_HA16A): Likewise.
(R_PPC_VLE_HA16D): Likewise.
(R_PPC_VLE_SDA21): Likewise.
(R_PPC_VLE_SDA21_LO): Likewise.
(R_PPC_VLE_SDAREL_LO16A): Likewise.
(R_PPC_VLE_SDAREL_LO16D): Likewise.
(R_PPC_VLE_SDAREL_HI16A): Likewise.
(R_PPC_VLE_SDAREL_HI16D): Likewise.
(R_PPC_VLE_SDAREL_HA16A): Likewise.
(R_PPC_VLE_SDAREL_HA16D): Likewise.
(SEC_PPC_VLE): Remove.
(PF_PPC_VLE): New program header flag.
(SHF_PPC_VLE): New section header flag.
(vle_opcodes, vle_num_opcodes): New.
(VLE_OP): New macro.
(VLE_OP_TO_SEG): New macro.
2012-05-14 Catherine Moore <clm@codesourcery.com>
Maciej W. Rozycki <macro@codesourcery.com>
Rhonda Wittels <rhonda@codesourcery.com>
include/opcode/
* ppc.h (PPC_OPCODE_VLE): New definition.
(PPC_OP_SA): New macro.
(PPC_OP_SE_VLE): New macro.
(PPC_OP): Use a variable shift amount.
(powerpc_operand): Update comments.
(PPC_OPSHIFT_INV): New macro.
(PPC_OPERAND_CR): Replace with...
(PPC_OPERAND_CR_BIT): ...this and
(PPC_OPERAND_CR_REG): ...this.
2012-05-14 James Lemke <jwlemke@codesourcery.com>
ld/
* ldlang.c (walk_wild_consider_section): Don't copy section_flag_list.
Pass it to callback.
(walk_wild_section_general): Pass section_flag_list to callback.
(lang_add_section): Add sflag_list parm.
Move out logic to keep / omit a section & call bfd_lookup_section_flags.
(output_section_callback_fast): Add sflag_list parm.
Add new parm to lang_add_section calls.
(output_section_callback): Likewise.
(check_section_callback): Add sflag_list parm.
(lang_place_orphans): Add new parm to lang_add_section calls.
(gc_section_callback): Add sflag_list parm.
(find_relro_section_callback): Likewise.
* ldlang.h (callback_t): Add flag_info parm.
(lang_add_section): Add sflag_list parm.
* emultempl/armelf.em (elf32_arm_add_stub_section):
Add lang_add_section parm.
* emultempl/beos.em (gld*_place_orphan): Likewise.
* emultempl/elf32.em (gld*_place_orphan): Likewise.
* emultempl/hppaelf.em (hppaelf_add_stub_section): Likewise.
* emultempl/m68hc1xelf.em (m68hc11elf_add_stub_section): Likewise.
* emultempl/mipself.em (mips_add_stub_section): Likewise.
* emultempl/mmo.em (mmo_place_orphan): Likewise.
* emultempl/pe.em (gld_*_place_orphan): Likewise.
* emultempl/pep.em (gld_*_place_orphan): Likewise.
* emultempl/ppc64elf.em (ppc_add_stub_section): Likewise.
* emultempl/spuelf.em (spu_place_special_section): Likewise.
* emultempl/vms.em (vms_place_orphan): Likewise.
2012-05-14 James Lemke <jwlemke@codesourcery.com>
ld/testsuite/
* ld-powerpc/powerpc.exp: Create ppceabitests.
* ld-powerpc/vle-multiseg.s: New.
* ld-powerpc/vle-multiseg-1.d: New.
* ld-powerpc/vle-multiseg-1.ld: New.
* ld-powerpc/vle-multiseg-2.d: New.
* ld-powerpc/vle-multiseg-2.ld: New.
* ld-powerpc/vle-multiseg-3.d: New.
* ld-powerpc/vle-multiseg-3.ld: New.
* ld-powerpc/vle-multiseg-4.d: New.
* ld-powerpc/vle-multiseg-4.ld: New.
* ld-powerpc/vle-multiseg-5.d: New.
* ld-powerpc/vle-multiseg-5.ld: New.
* ld-powerpc/vle-multiseg-6.d: New.
* ld-powerpc/vle-multiseg-6.ld: New.
* ld-powerpc/vle-multiseg-6a.s: New.
* ld-powerpc/vle-multiseg-6b.s: New.
* ld-powerpc/vle-multiseg-6c.s: New.
* ld-powerpc/vle-multiseg-6d.s: New.
* ld-powerpc/powerpc.exp: Run new tests.
2012-05-14 Catherine Moore <clm@codesourcery.com>
ld/
* NEWS: Mention PowerPC VLE port.
2012-05-14 Catherine Moore <clm@codesourcery.com>
ld/testsuite/
* ld-powerpc/apuinfo.rd: Update for VLE.
* ld-powerpc/vle-reloc-1.d: New.
* ld-powerpc/vle-reloc-1.s: New.
* ld-powerpc/vle-reloc-2.d: New.
* ld-powerpc/vle-reloc-2.s: New.
* ld-powerpc/vle-reloc-3.d: New.
* ld-powerpc/vle-reloc-3.s: New.
* ld-powerpc/vle-reloc-def-1.s: New.
* ld-powerpc/vle-reloc-def-2.s: New.
* ld-powerpc/vle-reloc-def-3.s: New.
2012-05-14 James Lemke <jwlemke@codesourcery.com>
opcodes/
* ppc-dis.c (get_powerpc_dialect): Use is_ppc_vle.
(PPC_OPCD_SEGS, VLE_OPCD_SEGS): New defines.
(vle_opcd_indices): New array.
(lookup_vle): New function.
(disassemble_init_powerpc): Revise for second (VLE) opcode table.
(print_insn_powerpc): Likewise.
* ppc-opc.c: Likewise.
2012-05-14 Catherine Moore <clm@codesourcery.com>
Maciej W. Rozycki <macro@codesourcery.com>
Rhonda Wittels <rhonda@codesourcery.com>
Nathan Froyd <froydnj@codesourcery.com>
opcodes/
* ppc-opc.c (insert_arx, extract_arx): New functions.
(insert_ary, extract_ary): New functions.
(insert_li20, extract_li20): New functions.
(insert_rx, extract_rx): New functions.
(insert_ry, extract_ry): New functions.
(insert_sci8, extract_sci8): New functions.
(insert_sci8n, extract_sci8n): New functions.
(insert_sd4h, extract_sd4h): New functions.
(insert_sd4w, extract_sd4w): New functions.
(insert_vlesi, extract_vlesi): New functions.
(insert_vlensi, extract_vlensi): New functions.
(insert_vleui, extract_vleui): New functions.
(insert_vleil, extract_vleil): New functions.
(BI_MASK, BB_MASK, BT): Use PPC_OPERAND_CR_BIT.
(BI16, BI32, BO32, B8): New.
(B15, B24, CRD32, CRS): New.
(CRD, OBF, BFA, CR, CRFS): Use PPC_OPERAND_CR_REG.
(DB, IMM20, RD, Rx, ARX, RY, RZ): New.
(ARY, SCLSCI8, SCLSCI8N, SE_SD, SE_SDH): New.
(SH6_MASK): Use PPC_OPSHIFT_INV.
(SI8, UI5, OIMM5, UI7, BO16): New.
(VLESIMM, VLENSIMM, VLEUIMM, VLEUIMML): New.
(XT6, XA6, XB6, XB6S, XC6): Use PPC_OPSHIFT_INV.
(ALLOW8_SPRG): New.
(insert_sprg, extract_sprg): Check ALLOW8_SPRG.
(OPVUP, OPVUP_MASK OPVUP): New
(BD8, BD8_MASK, BD8IO, BD8IO_MASK): New.
(EBD8IO, EBD8IO1_MASK, EBD8IO2_MASK, EBD8IO3_MASK): New.
(BD15, BD15_MASK, EBD15, EBD15_MASK, EBD15BI, EBD15BI_MASK): New.
(BD24,BD24_MASK, C_LK, C_LK_MASK, C, C_MASK): New.
(IA16, IA16_MASK, I16A, I16A_MASK, I16L, I16L_MASK): New.
(IM7, IM7_MASK, LI20, LI20_MASK, SCI8, SCI8_MASK): New.
(SCI8BF, SCI8BF_MASK, SD4, SD4_MASK): New.
(SE_IM5, SE_IM5_MASK): New.
(SE_R, SE_R_MASK, SE_RR, SE_RR_MASK): New.
(EX, EX_MASK, BO16F, BO16T, BO32F, BO32T): New.
(BO32DNZ, BO32DZ): New.
(NO371, PPCSPE, PPCISEL, PPCEFS, MULHW): Include PPC_OPCODE_VLE.
(PPCVLE): New.
(powerpc_opcodes): Add new VLE instructions. Update existing
instruction to include PPCVLE if supported.
* ppc-dis.c (ppc_opts): Add vle entry.
(get_powerpc_dialect): New function.
(powerpc_init_dialect): VLE support.
(print_insn_big_powerpc): Call get_powerpc_dialect.
(print_insn_little_powerpc): Likewise.
(operand_value_powerpc): Handle negative shift counts.
(print_insn_powerpc): Handle 2-byte instruction lengths.
2012-05-15 03:45:30 +08:00
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* Add support for the VLE extension to the PowerPC architecture.
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2012-05-03 21:12:08 +08:00
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* Add support for the Freescale XGATE architecture.
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2011-11-03 00:28:31 +08:00
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* Add option -f FILE on AIX (for response file).
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2011-11-02 11:09:11 +08:00
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* Add support for the Renesas RL78 architecture.
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bfd:
* Makefile.am (ALL_MACHINES): Add cpu-epiphany.lo .
(ALL_MACHINES_CFILES): Add cpu-epiphany.c .
(BFD32_BACKENDS): Add elf32-epiphany.lo .
(BFD32_BACKENDS_CFILES): Add elf32-epiphany.c .
* Makefile.in, bfd-in2.h, configure, libbfd.h: Regenerate.
* archures.c (bfd_arch_epiphany): Add.
(bfd_mach_epiphany16, bfd_mach_epiphany32): Define.
(bfd_epiphany_arch): Declare.
(bfd_archures_list): Add &bfd_epiphany_arch.
* config.bfd (epiphany-*-elf): New target case.
* configure.in (bfd_elf32_epiphany_vec): New target vector case.
* reloc.c (BFD_RELOC_EPIPHANY_SIMM8): New relocation.
(BFD_RELOC_EPIPHANY_SIMM24, BFD_RELOC_EPIPHANY_HIGH): Likewise.
(BFD_RELOC_EPIPHANY_LOW, BFD_RELOC_EPIPHANY_SIMM11): Likewise.
(BFD_RELOC_EPIPHANY_IMM11, BFD_RELOC_EPIPHANY_IMM8): Likewise.
* targets.c (bfd_elf32_epiphany_vec): Declare.
(_bfd_target_vector): Add bfd_elf32_epiphany_vec.
* po/SRC-POTFILES.in, po/bfd.pot: Regenerate.
* cpu-epiphany.c, elf32-epiphany.c: New files.
binutils:
* readelf.c (include "elf/epiphany.h")
(guess_is_rela, dump_relocation): Handle EM_ADAPTEVA_EPIPHANY.
(get_machine_name, is_32bit_abs_reloc, is_32bit_pcrel_reloc): Likewise.
(is_16bit_abs_reloc, is_none_reloc): Likewise.
* po/binutils.pot: Regenerate.
cpu:
* cpu/epiphany.cpu, cpu/epiphany.opc: New files.
gas:
* NEWS: Mention addition of Adapteva Epiphany support.
* config/tc-epiphany.c, config/tc-epiphany.h: New files.
* Makefile.am (TARGET_CPU_CFILES): Add config/tc-epiphany.c .
(TARGET_CPU_HFILES): Add config/tc-epiphany.h .
* Makefile.in, configure, doc/Makefile.in, po/POTFILES.in: Regenerate.
* configure.in: Also set using_cgen for epiphany.
* configure.tgt: Handle epiphany.
* doc/Makefile.am (CPU_DOCS): Add c-epiphany.texi .
* doc/all.texi: Set EPIPHANY.
* doc/as.texinfo: Add EPIPHANY-specific text.
* doc/c-epiphany.texi: New file.
* po/gas.pot: Regenerate.
gas/testsuite:
* gas/epiphany: New directory.
include:
* dis-asm.h (print_insn_epiphany): Declare.
* elf/epiphany.h: New file.
* elf/common.h (EM_ADAPTEVA_EPIPHANY): Define.
ld:
* NEWS: Mention addition of Adapteva Epiphany support.
* Makefile.am (ALL_EMULATION_SOURCES): Add eelf32epiphany.c .
(eelf32epiphany.c): New rule.
* Makefile.in: Regenerate.
* configure.tgt: Handle epiphany-*-elf.
* po/ld.pot: Regenerate.
* testsuite/ld-srec/srec.exp: xfail epiphany.
* emulparams/elf32epiphany.sh: New file.
opcodes:
* Makefile.am (HFILES): Add epiphany-desc.h and epiphany-opc.h .
(TARGET_LIBOPCODES_CFILES): Add epiphany-asm.c, epiphany-desc.c,
epiphany-dis.c, epiphany-ibld.c and epiphany-opc.c .
(CLEANFILES): Add stamp-epiphany.
(EPIPHANY_DEPS): Set. Make CGEN-generated Epiphany files depend on it.
(stamp-epiphany): New rule.
* Makefile.in, configure, po/POTFILES.in, po/opcodes.pot: Regenerate.
* configure.in: Handle bfd_epiphany_arch.
* disassemble.c (ARCH_epiphany): Define.
(disassembler): Handle bfd_arch_epiphany.
* epiphany-asm.c, epiphany-desc.c, epiphany-desc.h: New files.
* epiphany-dis.c, epiphany-ibld.c, epiphany-opc.c: Likewise.
* epiphany-opc.h: Likewise.
2011-10-25 19:18:16 +08:00
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* Add support for the Adapteva EPIPHANY architecture.
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2011-09-22 16:11:16 +08:00
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Changes in 2.22:
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2011-08-26 20:48:08 +08:00
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* --copy-dt-needed-entries is no longer enabled by default. Instead
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--no-copy-dt-needed-entries is the default.
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2011-07-11 23:03:09 +08:00
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* INPUT_SECTION_FLAGS has been added to the linker script language
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bfd:
* Makefile.am (ALL_MACHINES): Add cpu-epiphany.lo .
(ALL_MACHINES_CFILES): Add cpu-epiphany.c .
(BFD32_BACKENDS): Add elf32-epiphany.lo .
(BFD32_BACKENDS_CFILES): Add elf32-epiphany.c .
* Makefile.in, bfd-in2.h, configure, libbfd.h: Regenerate.
* archures.c (bfd_arch_epiphany): Add.
(bfd_mach_epiphany16, bfd_mach_epiphany32): Define.
(bfd_epiphany_arch): Declare.
(bfd_archures_list): Add &bfd_epiphany_arch.
* config.bfd (epiphany-*-elf): New target case.
* configure.in (bfd_elf32_epiphany_vec): New target vector case.
* reloc.c (BFD_RELOC_EPIPHANY_SIMM8): New relocation.
(BFD_RELOC_EPIPHANY_SIMM24, BFD_RELOC_EPIPHANY_HIGH): Likewise.
(BFD_RELOC_EPIPHANY_LOW, BFD_RELOC_EPIPHANY_SIMM11): Likewise.
(BFD_RELOC_EPIPHANY_IMM11, BFD_RELOC_EPIPHANY_IMM8): Likewise.
* targets.c (bfd_elf32_epiphany_vec): Declare.
(_bfd_target_vector): Add bfd_elf32_epiphany_vec.
* po/SRC-POTFILES.in, po/bfd.pot: Regenerate.
* cpu-epiphany.c, elf32-epiphany.c: New files.
binutils:
* readelf.c (include "elf/epiphany.h")
(guess_is_rela, dump_relocation): Handle EM_ADAPTEVA_EPIPHANY.
(get_machine_name, is_32bit_abs_reloc, is_32bit_pcrel_reloc): Likewise.
(is_16bit_abs_reloc, is_none_reloc): Likewise.
* po/binutils.pot: Regenerate.
cpu:
* cpu/epiphany.cpu, cpu/epiphany.opc: New files.
gas:
* NEWS: Mention addition of Adapteva Epiphany support.
* config/tc-epiphany.c, config/tc-epiphany.h: New files.
* Makefile.am (TARGET_CPU_CFILES): Add config/tc-epiphany.c .
(TARGET_CPU_HFILES): Add config/tc-epiphany.h .
* Makefile.in, configure, doc/Makefile.in, po/POTFILES.in: Regenerate.
* configure.in: Also set using_cgen for epiphany.
* configure.tgt: Handle epiphany.
* doc/Makefile.am (CPU_DOCS): Add c-epiphany.texi .
* doc/all.texi: Set EPIPHANY.
* doc/as.texinfo: Add EPIPHANY-specific text.
* doc/c-epiphany.texi: New file.
* po/gas.pot: Regenerate.
gas/testsuite:
* gas/epiphany: New directory.
include:
* dis-asm.h (print_insn_epiphany): Declare.
* elf/epiphany.h: New file.
* elf/common.h (EM_ADAPTEVA_EPIPHANY): Define.
ld:
* NEWS: Mention addition of Adapteva Epiphany support.
* Makefile.am (ALL_EMULATION_SOURCES): Add eelf32epiphany.c .
(eelf32epiphany.c): New rule.
* Makefile.in: Regenerate.
* configure.tgt: Handle epiphany-*-elf.
* po/ld.pot: Regenerate.
* testsuite/ld-srec/srec.exp: xfail epiphany.
* emulparams/elf32epiphany.sh: New file.
opcodes:
* Makefile.am (HFILES): Add epiphany-desc.h and epiphany-opc.h .
(TARGET_LIBOPCODES_CFILES): Add epiphany-asm.c, epiphany-desc.c,
epiphany-dis.c, epiphany-ibld.c and epiphany-opc.c .
(CLEANFILES): Add stamp-epiphany.
(EPIPHANY_DEPS): Set. Make CGEN-generated Epiphany files depend on it.
(stamp-epiphany): New rule.
* Makefile.in, configure, po/POTFILES.in, po/opcodes.pot: Regenerate.
* configure.in: Handle bfd_epiphany_arch.
* disassemble.c (ARCH_epiphany): Define.
(disassembler): Handle bfd_arch_epiphany.
* epiphany-asm.c, epiphany-desc.c, epiphany-desc.h: New files.
* epiphany-dis.c, epiphany-ibld.c, epiphany-opc.c: Likewise.
* epiphany-opc.h: Likewise.
2011-10-25 19:18:16 +08:00
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to allow selection of input sections by section header section flags.
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2011-07-11 23:03:09 +08:00
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2011-10-28 22:37:30 +08:00
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* Add support for the Tilera TILEPro and TILE-Gx architectures.
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2011-06-15 17:12:09 +08:00
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2010-12-15 22:56:40 +08:00
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* Added SORT_BY_INIT_PRIORITY to the linker script language to permit
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bfd:
* Makefile.am (ALL_MACHINES): Add cpu-epiphany.lo .
(ALL_MACHINES_CFILES): Add cpu-epiphany.c .
(BFD32_BACKENDS): Add elf32-epiphany.lo .
(BFD32_BACKENDS_CFILES): Add elf32-epiphany.c .
* Makefile.in, bfd-in2.h, configure, libbfd.h: Regenerate.
* archures.c (bfd_arch_epiphany): Add.
(bfd_mach_epiphany16, bfd_mach_epiphany32): Define.
(bfd_epiphany_arch): Declare.
(bfd_archures_list): Add &bfd_epiphany_arch.
* config.bfd (epiphany-*-elf): New target case.
* configure.in (bfd_elf32_epiphany_vec): New target vector case.
* reloc.c (BFD_RELOC_EPIPHANY_SIMM8): New relocation.
(BFD_RELOC_EPIPHANY_SIMM24, BFD_RELOC_EPIPHANY_HIGH): Likewise.
(BFD_RELOC_EPIPHANY_LOW, BFD_RELOC_EPIPHANY_SIMM11): Likewise.
(BFD_RELOC_EPIPHANY_IMM11, BFD_RELOC_EPIPHANY_IMM8): Likewise.
* targets.c (bfd_elf32_epiphany_vec): Declare.
(_bfd_target_vector): Add bfd_elf32_epiphany_vec.
* po/SRC-POTFILES.in, po/bfd.pot: Regenerate.
* cpu-epiphany.c, elf32-epiphany.c: New files.
binutils:
* readelf.c (include "elf/epiphany.h")
(guess_is_rela, dump_relocation): Handle EM_ADAPTEVA_EPIPHANY.
(get_machine_name, is_32bit_abs_reloc, is_32bit_pcrel_reloc): Likewise.
(is_16bit_abs_reloc, is_none_reloc): Likewise.
* po/binutils.pot: Regenerate.
cpu:
* cpu/epiphany.cpu, cpu/epiphany.opc: New files.
gas:
* NEWS: Mention addition of Adapteva Epiphany support.
* config/tc-epiphany.c, config/tc-epiphany.h: New files.
* Makefile.am (TARGET_CPU_CFILES): Add config/tc-epiphany.c .
(TARGET_CPU_HFILES): Add config/tc-epiphany.h .
* Makefile.in, configure, doc/Makefile.in, po/POTFILES.in: Regenerate.
* configure.in: Also set using_cgen for epiphany.
* configure.tgt: Handle epiphany.
* doc/Makefile.am (CPU_DOCS): Add c-epiphany.texi .
* doc/all.texi: Set EPIPHANY.
* doc/as.texinfo: Add EPIPHANY-specific text.
* doc/c-epiphany.texi: New file.
* po/gas.pot: Regenerate.
gas/testsuite:
* gas/epiphany: New directory.
include:
* dis-asm.h (print_insn_epiphany): Declare.
* elf/epiphany.h: New file.
* elf/common.h (EM_ADAPTEVA_EPIPHANY): Define.
ld:
* NEWS: Mention addition of Adapteva Epiphany support.
* Makefile.am (ALL_EMULATION_SOURCES): Add eelf32epiphany.c .
(eelf32epiphany.c): New rule.
* Makefile.in: Regenerate.
* configure.tgt: Handle epiphany-*-elf.
* po/ld.pot: Regenerate.
* testsuite/ld-srec/srec.exp: xfail epiphany.
* emulparams/elf32epiphany.sh: New file.
opcodes:
* Makefile.am (HFILES): Add epiphany-desc.h and epiphany-opc.h .
(TARGET_LIBOPCODES_CFILES): Add epiphany-asm.c, epiphany-desc.c,
epiphany-dis.c, epiphany-ibld.c and epiphany-opc.c .
(CLEANFILES): Add stamp-epiphany.
(EPIPHANY_DEPS): Set. Make CGEN-generated Epiphany files depend on it.
(stamp-epiphany): New rule.
* Makefile.in, configure, po/POTFILES.in, po/opcodes.pot: Regenerate.
* configure.in: Handle bfd_epiphany_arch.
* disassemble.c (ARCH_epiphany): Define.
(disassembler): Handle bfd_arch_epiphany.
* epiphany-asm.c, epiphany-desc.c, epiphany-desc.h: New files.
* epiphany-dis.c, epiphany-ibld.c, epiphany-opc.c: Likewise.
* epiphany-opc.h: Likewise.
2011-10-25 19:18:16 +08:00
|
|
|
|
sorting sections by numerical value of the GCC init_priority attribute
|
|
|
|
|
|
encoded in the section name.
|
2010-12-15 22:56:40 +08:00
|
|
|
|
|
2010-11-05 16:33:51 +08:00
|
|
|
|
Changes in 2.21:
|
|
|
|
|
|
|
2010-08-26 00:03:58 +08:00
|
|
|
|
* Linker script expression evaluation is somewhat more sane. This may
|
|
|
|
|
|
break scripts that depend on quirks of the old expression evaluation.
|
|
|
|
|
|
|
2010-04-28 23:24:22 +08:00
|
|
|
|
* Turn off underscoring for x86_64 PE+-COFF targets. For old behavior the
|
|
|
|
|
|
option --enable-leading-mingw64-underscores can be used on configure of
|
|
|
|
|
|
bfd.
|
|
|
|
|
|
|
bfd:
* Makefile.am (ALL_MACHINES): Add cpu-tic6x.lo.
(ALL_MACHINES_CFILES): Add cpu-tic6x.c.
(BFD32_BACKENDS): Add elf32-tic6x.lo.
(BFD32_BACKENDS_CFILES): Add elf32-tic6x.c.
* Makefile.in: Regenerate.
* archures.c (bfd_arch_tic6x, bfd_tic6x_arch): New.
(bfd_archures_list): Update.
* config.bfd (tic6x-*-elf): New.
* configure.in (bfd_elf32_tic6x_be_vec, bfd_elf32_tic6x_le_vec):
New.
* configure: Regenerate.
* cpu-tic6x.c, elf32-tic6x.c: New.
* reloc.c (BFD_RELOC_C6000_PCR_S21, BFD_RELOC_C6000_PCR_S12,
BFD_RELOC_C6000_PCR_S10, BFD_RELOC_C6000_PCR_S7,
BFD_RELOC_C6000_ABS_S16, BFD_RELOC_C6000_ABS_L16,
BFD_RELOC_C6000_ABS_H16, BFD_RELOC_C6000_SBR_U15_B,
BFD_RELOC_C6000_SBR_U15_H, BFD_RELOC_C6000_SBR_U15_W,
BFD_RELOC_C6000_SBR_S16, BFD_RELOC_C6000_SBR_L16_B,
BFD_RELOC_C6000_SBR_L16_H, BFD_RELOC_C6000_SBR_L16_W,
BFD_RELOC_C6000_SBR_H16_B, BFD_RELOC_C6000_SBR_H16_H,
BFD_RELOC_C6000_SBR_H16_W, BFD_RELOC_C6000_SBR_GOT_U15_W,
BFD_RELOC_C6000_SBR_GOT_L16_W, BFD_RELOC_C6000_SBR_GOT_H16_W,
BFD_RELOC_C6000_DSBT_INDEX, BFD_RELOC_C6000_PREL31,
BFD_RELOC_C6000_COPY, BFD_RELOC_C6000_ALIGN,
BFD_RELOC_C6000_FPHEAD, BFD_RELOC_C6000_NOCMP): New.
* targets.c (bfd_elf32_tic6x_be_vec, bfd_elf32_tic6x_le_vec): New.
(_bfd_target_vector): Update.
* bfd-in2.h, libbfd.h: Regenerate.
binutils:
* MAINTAINERS: Add self as TI C6X maintainer.
* NEWS: Add news entry for TI C6X support.
* readelf.c: Include elf/tic6x.h.
(guess_is_rela): Handle EM_TI_C6000.
(dump_relocations): Likewise.
(get_tic6x_dynamic_type): New.
(get_dynamic_type): Call it.
(get_machine_flags): Handle EF_C6000_REL.
(get_osabi_name): Handle machine-specific values only for relevant
machines. Handle C6X values.
(get_tic6x_segment_type): New.
(get_segment_type): Call it.
(get_tic6x_section_type_name): New.
(get_section_type_name): Call it.
(is_32bit_abs_reloc, is_16bit_abs_reloc, is_none_reloc): Handle
EM_TI_C6000.
gas:
* Makefile.am (TARGET_CPU_CFILES): Add config/tc-tic6x.c.
(TARGET_CPU_HFILES): Add config/tc-tic6x.h.
* Makefile.in: Regenerate.
* NEWS: Add news entry for TI C6X support.
* app.c (do_scrub_chars): Handle "||^" for TI C6X. Handle
TC_PREDICATE_START_CHAR and TC_PREDICATE_END_CHAR. Keep spaces in
operands if TC_KEEP_OPERAND_SPACES.
* configure.tgt (tic6x-*-*): New.
* config/tc-ia64.h (TC_PREDICATE_START_CHAR,
TC_PREDICATE_END_CHAR): Define.
* config/tc-tic6x.c, config/tc-tic6x.h: New.
* doc/Makefile.am (CPU_DOCS): Add c-tic6x.texi.
* doc/Makefile.in: Regenerate.
* doc/all.texi (TIC6X): Define.
* doc/as.texinfo: Add TI C6X documentation. Include c-tic6x.texi.
* doc/c-tic6x.texi: New.
gas/testsuite:
* gas/tic6x: New directory and testcases.
include:
* dis-asm.h (print_insn_tic6x): Declare.
include/elf:
* common.h (ELFOSABI_C6000_ELFABI, ELFOSABI_C6000_LINUX): Define.
* tic6x.h: New.
include/opcode:
* tic6x-control-registers.h, tic6x-insn-formats.h,
tic6x-opcode-table.h, tic6x.h: New.
ld:
* Makefile.am (ALL_EMULATIONS): Add eelf32_tic6x_be.o and
eelf32_tic6x_le.o.
(eelf32_tic6x_be.c, eelf32_tic6x_le.c): New.
* NEWS: Add news entry for TI C6X support.
* configure.tgt (tic6x-*-*): New.
* emulparams/elf32_tic6x_be.sh, emulparams/elf32_tic6x_le.sh: New.
ld/testsuite:
* ld-elf/flags1.d, ld-elf/merge.d: XFAIL for tic6x-*-*.
* ld-elf/sec-to-seg.exp: Set B_test_same_seg to 0 for tic6x-*-*.
* ld-tic6x: New directory and testcases.
opcodes:
* Makefile.am (TARGET_LIBOPCODES_CFILES): Add tic6x-dis.c.
* Makefile.in: Regenerate.
* configure.in (bfd_tic6x_arch): New.
* configure: Regenerate.
* disassemble.c (ARCH_tic6x): Define if ARCH_all.
(disassembler): Handle TI C6X.
* tic6x-dis.c: New.
2010-03-26 05:12:36 +08:00
|
|
|
|
* Add support for the TMS320C6000 (TI C6X) processor family.
|
|
|
|
|
|
|
2009-11-05 23:35:50 +08:00
|
|
|
|
* --add-needed renamed to --copy-dt-needed-entries in order to avoid confusion
|
|
|
|
|
|
with --as-needed option.
|
|
|
|
|
|
|
2009-10-23 19:40:17 +08:00
|
|
|
|
* Extend .def file syntax by '== <ID>' for imports and exports. This allows
|
|
|
|
|
|
to alias the import/export table name written in PE image.
|
|
|
|
|
|
|
2011-11-03 00:28:31 +08:00
|
|
|
|
* Add --exclude-all-symbols option to PE based linkers. This prevents all
|
2009-10-16 23:15:39 +08:00
|
|
|
|
symbols from automatically being exported.
|
|
|
|
|
|
|
2009-09-29 22:17:19 +08:00
|
|
|
|
* Add support for the Renesas RX processor.
|
|
|
|
|
|
|
2010-09-09 18:46:33 +08:00
|
|
|
|
* Add support for alpha-vms target.
|
|
|
|
|
|
|
2009-09-04 16:23:49 +08:00
|
|
|
|
Changes in 2.20:
|
|
|
|
|
|
|
2009-07-23 21:00:30 +08:00
|
|
|
|
* GNU/Linux targets now support the STB_GNU_UNIQUE symbol binding. This is a
|
|
|
|
|
|
GNU extension to the standard set of ELF symbol bindings. The binding will
|
|
|
|
|
|
be passed on to the dynamic linker which will make sure that in the entire
|
|
|
|
|
|
process there is just one symbol with the given name and type in use.
|
2009-01-08 21:28:48 +08:00
|
|
|
|
|
2009-05-20 00:08:08 +08:00
|
|
|
|
* PE targets now support a GNU extension to allow the alignment of common
|
|
|
|
|
|
common symbols to be specified. This support uses custom options in
|
|
|
|
|
|
the .drectve section, which will be disregarded by the native tools.
|
|
|
|
|
|
|
2009-05-04 20:09:30 +08:00
|
|
|
|
* PE targets now add primitive support for ELF version scripts; symbols
|
|
|
|
|
|
are not versioned, but the local and global symbol visibility directives
|
|
|
|
|
|
are respected when filtering symbols in auto-export mode.
|
|
|
|
|
|
|
2009-04-30 01:24:27 +08:00
|
|
|
|
* New option --no-export-dynamic to undo the effect of the -E and
|
|
|
|
|
|
--export-dynamic options.
|
|
|
|
|
|
|
2009-04-09 00:04:50 +08:00
|
|
|
|
* ELF: --warn-alternate-em option to warn if an object has alternate
|
|
|
|
|
|
ELF machine code.
|
|
|
|
|
|
|
2009-03-03 01:27:36 +08:00
|
|
|
|
* New script function REGION_ALIAS to add alias names to memory regions.
|
|
|
|
|
|
|
2009-02-19 02:23:08 +08:00
|
|
|
|
* PE targets no longer make use of the long section names PE extension to
|
|
|
|
|
|
the COFF format when generating executable images, by default. The old
|
|
|
|
|
|
(slightly non-conformant) behaviour can still be invoked by using the
|
2009-03-04 02:22:11 +08:00
|
|
|
|
new '--enable-long-section-names' command-line option. It is also enabled
|
|
|
|
|
|
automatically in the presence of un-stripped debug information, as GDB
|
|
|
|
|
|
needs to be able to find the debug info sections by their full names.
|
2009-02-19 02:23:08 +08:00
|
|
|
|
|
2009-04-30 23:47:13 +08:00
|
|
|
|
* For GNU/Linux systems the linker will now avoid processing any relocations
|
|
|
|
|
|
made against symbols of the STT_GNU_IFUNC type and instead emit them into
|
|
|
|
|
|
the resulting binary for processing by the loader.
|
|
|
|
|
|
|
2009-02-03 23:56:59 +08:00
|
|
|
|
* --as-needed now links in a dynamic library if it satisfies undefined
|
|
|
|
|
|
symbols in regular objects, or in other dynamic libraries. In the
|
|
|
|
|
|
latter case the library is not linked if it is found in a DT_NEEDED
|
|
|
|
|
|
entry of one of the libraries already linked.
|
|
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* Add a new command-line option, -Ttext-segment ADDR, for ELF targets
|
2009-01-16 22:14:07 +08:00
|
|
|
|
to set the address of the first byte of the text segment.
|
|
|
|
|
|
|
2009-03-02 18:33:08 +08:00
|
|
|
|
* Add support for Sunplus score architecture.
|
|
|
|
|
|
|
2009-01-08 21:28:48 +08:00
|
|
|
|
* Add new option --use-nul-prefixed-import-tables to ld for PE targets to
|
|
|
|
|
|
allow fallback to old import table generation with null element prefix.
|
|
|
|
|
|
|
2009-01-04 02:04:16 +08:00
|
|
|
|
* Windows PE systems now support a new --exclude-modules-for-implib option,
|
|
|
|
|
|
allowing users to partition object files and archive members between a DLL
|
|
|
|
|
|
and its associated import library as they are generated during linking.
|
|
|
|
|
|
|
2008-12-24 03:10:25 +08:00
|
|
|
|
* Add support for Lattice Mico32 (lm32) architecture.
|
|
|
|
|
|
|
2012-06-23 00:52:33 +08:00
|
|
|
|
* Add CR16 ELF --embedded-relocs (used to embedded relocations into binaries
|
2008-11-27 20:41:14 +08:00
|
|
|
|
for Embedded-PIC code) option.
|
|
|
|
|
|
|
2008-11-14 23:13:05 +08:00
|
|
|
|
* Add to the PE/PE+ targets the support of two different kinds of
|
|
|
|
|
|
pseudo-relocations. They can be selected by the switches
|
|
|
|
|
|
--enable-runtime-pseudo-reloc-v1 and --enable-runtime-pseudo-reloc-v2.
|
|
|
|
|
|
For the switch --enable-runtime-pseudo-reloc it uses for 32-bit
|
|
|
|
|
|
runtime pseudo relocation version one, for 64-bit the version two.
|
|
|
|
|
|
|
2008-09-08 16:56:57 +08:00
|
|
|
|
Changes in 2.19:
|
|
|
|
|
|
|
2008-09-07 12:02:31 +08:00
|
|
|
|
* Linker scripts support a new INSERT command that makes it easier to
|
|
|
|
|
|
augment the default script.
|
|
|
|
|
|
|
2008-06-07 19:35:46 +08:00
|
|
|
|
* Linker script input section filespecs may now specify a file within an
|
2008-09-07 12:02:31 +08:00
|
|
|
|
archive by writing "archive:file".
|
2008-06-07 19:35:46 +08:00
|
|
|
|
|
2008-06-01 00:35:56 +08:00
|
|
|
|
* The --sort-common switch now has an optional argument which specifies the
|
|
|
|
|
|
direction of sorting.
|
|
|
|
|
|
|
Multi-GOT support for m68k.
bfd/
* elf32-m68k.c (struct elf_m68k_link_hash_entry: got_entry_key,
glist): New fields.
(struct elf_m68k_got_entry_key, struct elf_m68k_got_entry,
struct elf_m68k_got, struct elf_m68k_bfd2got_entry,
struct elf_m68k_multi_got): New data structures.
(struct elf_m68k_link_hash_table: local_gp_p, use_neg_got_offsets_p,
allow_multigot_p, multi_got_): New fields.
(elf_m68k_multi_got): New macro.
(elf_m68k_link_hash_newfunc): Initialize new fields of
struct elf_m68k_link_hash_entry.
(elf_m68k_link_hash_table_create): Initialize new fields of
struct elf_m68k_link_hash_table.
(elf_m68k_link_hash_table_free): New static function implementing hook.
(elf_m68k_init_got, elf_m68k_clear_got, elf_m68k_create_empty_got): New
static functions for struct elf_m68k_got.
(elf_m68k_init_got_entry_key, elf_m68k_got_entry_hash,
elf_m68k_got_entry_eq): New static functions for
struct elf_m68k_got_entry.
(ELF_M68K_REL_8O_MAX_N_ENTRIES_IN_GOT,
ELF_M68K_REL_8O_16O_MAX_N_ENTRIES_IN_GOT): New macros.
(enum elf_m68k_get_entry_howto): New enum.
(elf_m68k_get_got_entry, elf_m68k_update_got_entry_type,
elf_m68k_remove_got_entry_type): New static functions for
struct elf_m68k_got_entry.
(elf_m68k_add_entry_to_got): New static function.
(elf_m68k_bfd2got_entry_hash, elf_m68k_bfd2got_entry_eq,
elf_m68k_bfd2got_entry_del, elf_m68k_get_bfd2got_entry): New static
functions for struct elf_m68k_bfd2got_entry.
(struct elf_m68k_can_merge_gots_arg, elf_m68k_can_merge_gots_1,
elf_m68k_can_merge_gots): New traversal.
(struct elf_m68k_merge_gots_arg, elf_m68k_merge_gots_1,
elf_m68k_merge_gots): Ditto.
(struct elf_m68k_finalize_got_offsets_arg,
elf_m68k_finalize_got_offsets_1, elf_m68k_finalize_got_offsets): Ditto.
(struct elf_m68k_partition_multi_got_arg,
elf_m68k_partition_multi_got_1, elf_m68k_init_symndx2h_1,
elf_m68k_partition_multi_got): Ditto.
(elf_m68k_find_got_entry_ptr, elf_m68k_remove_got_entry): New static
functions.
(elf_m68k_copy_indirect_symbol): New static function implementing
a hook.
(elf_m68k_check_relocs): Update to add entries to multi-GOT.
(elf_m68k_gc_sweep_hook): Update to remove entries from multi-GOT.
(elf_m68k_always_size_sections): Assign BFDs to GOTs.
(elf_m68k_relocate_section): Update to properly handle GOT relocations.
(elf_m68k_finish_dynamic_symbol): Update to traverse all GOT entries
of a global symbol.
(bfd_elf_m68k_set_target_options): New function.
(bfd_elf32_bfd_link_hash_table_free): Define hook.
(bfd_elf32_bfd_final_link): Change expansion to bfd_elf_final_link
to skip generic calculation of GOT offsets.
(elf_backend_copy_indirect_symbol): Define hook.
* bfd-in.h (bfd_elf_m68k_set_target_options): Declare function.
* bfd-in2.h: Regenerate.
ld/
* configure.in (--enable-got): New option. Handle it.
* configure: Regenerate.
* config.in: Regenerate.
* emultempl/m68kelf.em: (got_handling_target_default): New shell
variable.
(GOT_HANDLING_TARGET_DEFAULT): New macro.
(GOT_HANDLING_DEFAULT): New macro. Initialize it from configure
option if one was given.
(got_handling): New static variable.
(elf_m68k_create_output_section_statements): New static function
implementing hook.
(PARSE_AND_LIST_PROLOGUE): Define shell variable.
(OPTION_GOT): New macro.
(PARSE_AND_LIST_LONGOPTS): Define shell variable. Specify
--got option.
(got): New linker option.
(PARSE_AND_LIST_OPTIONS): Define shell variable. Print help string
for --got option.
(PARSE_AND_LIST_ARGS_CASES): Define shell variable. Handle --got
option.
* ld.texinfo: Document --got=<type> option.
* gen-doc.texi: Add M68K.
* NEWS: Mention the new feature.
ld/testsuite/
* ld-m68k/got-12.s: New file.
* ld-m68k/got-13.s: New file.
* ld-m68k/got-14.s: New file.
* ld-m68k/got-15.s: New file.
* ld-m68k/got-34.s: New file.
* ld-m68k/got-35.s: New file.
* ld-m68k/got-single-12-ok.d: New dump test.
* ld-m68k/got-single-13-er.d: New dump test.
* ld-m68k/got-negative-14-ok.d: New dump test.
* ld-m68k/got-negative-15-er.d: New dump test.
* ld-m68k/got-negative-12-13-14-34-ok.d: New dump test.
* ld-m68k/got-negative-12-13-14-35-er.d: New dump test.
* ld-m68k/got-multigot-14-ok.d: New dump test.
* ld-m68k/got-multigot-15-er.d: New dump test.
* ld-m68k/got-multigot-12-13-14-34-35-ok.d: New dump test.
* ld-m68k/xgot-15.s: New source.
* ld-m68k/got-xgot-15-ok.d: New test.
* ld-m68k/got-xgot-12-13-14-15-34-35-ok.d: New test.
* ld-m68k/m68k.exp: Run new tests.
2008-05-21 20:01:37 +08:00
|
|
|
|
* The M68K linker now supports multiple GOT generation schemes controlled via
|
2018-07-02 18:18:24 +08:00
|
|
|
|
the --got=<type> command-line option.
|
Multi-GOT support for m68k.
bfd/
* elf32-m68k.c (struct elf_m68k_link_hash_entry: got_entry_key,
glist): New fields.
(struct elf_m68k_got_entry_key, struct elf_m68k_got_entry,
struct elf_m68k_got, struct elf_m68k_bfd2got_entry,
struct elf_m68k_multi_got): New data structures.
(struct elf_m68k_link_hash_table: local_gp_p, use_neg_got_offsets_p,
allow_multigot_p, multi_got_): New fields.
(elf_m68k_multi_got): New macro.
(elf_m68k_link_hash_newfunc): Initialize new fields of
struct elf_m68k_link_hash_entry.
(elf_m68k_link_hash_table_create): Initialize new fields of
struct elf_m68k_link_hash_table.
(elf_m68k_link_hash_table_free): New static function implementing hook.
(elf_m68k_init_got, elf_m68k_clear_got, elf_m68k_create_empty_got): New
static functions for struct elf_m68k_got.
(elf_m68k_init_got_entry_key, elf_m68k_got_entry_hash,
elf_m68k_got_entry_eq): New static functions for
struct elf_m68k_got_entry.
(ELF_M68K_REL_8O_MAX_N_ENTRIES_IN_GOT,
ELF_M68K_REL_8O_16O_MAX_N_ENTRIES_IN_GOT): New macros.
(enum elf_m68k_get_entry_howto): New enum.
(elf_m68k_get_got_entry, elf_m68k_update_got_entry_type,
elf_m68k_remove_got_entry_type): New static functions for
struct elf_m68k_got_entry.
(elf_m68k_add_entry_to_got): New static function.
(elf_m68k_bfd2got_entry_hash, elf_m68k_bfd2got_entry_eq,
elf_m68k_bfd2got_entry_del, elf_m68k_get_bfd2got_entry): New static
functions for struct elf_m68k_bfd2got_entry.
(struct elf_m68k_can_merge_gots_arg, elf_m68k_can_merge_gots_1,
elf_m68k_can_merge_gots): New traversal.
(struct elf_m68k_merge_gots_arg, elf_m68k_merge_gots_1,
elf_m68k_merge_gots): Ditto.
(struct elf_m68k_finalize_got_offsets_arg,
elf_m68k_finalize_got_offsets_1, elf_m68k_finalize_got_offsets): Ditto.
(struct elf_m68k_partition_multi_got_arg,
elf_m68k_partition_multi_got_1, elf_m68k_init_symndx2h_1,
elf_m68k_partition_multi_got): Ditto.
(elf_m68k_find_got_entry_ptr, elf_m68k_remove_got_entry): New static
functions.
(elf_m68k_copy_indirect_symbol): New static function implementing
a hook.
(elf_m68k_check_relocs): Update to add entries to multi-GOT.
(elf_m68k_gc_sweep_hook): Update to remove entries from multi-GOT.
(elf_m68k_always_size_sections): Assign BFDs to GOTs.
(elf_m68k_relocate_section): Update to properly handle GOT relocations.
(elf_m68k_finish_dynamic_symbol): Update to traverse all GOT entries
of a global symbol.
(bfd_elf_m68k_set_target_options): New function.
(bfd_elf32_bfd_link_hash_table_free): Define hook.
(bfd_elf32_bfd_final_link): Change expansion to bfd_elf_final_link
to skip generic calculation of GOT offsets.
(elf_backend_copy_indirect_symbol): Define hook.
* bfd-in.h (bfd_elf_m68k_set_target_options): Declare function.
* bfd-in2.h: Regenerate.
ld/
* configure.in (--enable-got): New option. Handle it.
* configure: Regenerate.
* config.in: Regenerate.
* emultempl/m68kelf.em: (got_handling_target_default): New shell
variable.
(GOT_HANDLING_TARGET_DEFAULT): New macro.
(GOT_HANDLING_DEFAULT): New macro. Initialize it from configure
option if one was given.
(got_handling): New static variable.
(elf_m68k_create_output_section_statements): New static function
implementing hook.
(PARSE_AND_LIST_PROLOGUE): Define shell variable.
(OPTION_GOT): New macro.
(PARSE_AND_LIST_LONGOPTS): Define shell variable. Specify
--got option.
(got): New linker option.
(PARSE_AND_LIST_OPTIONS): Define shell variable. Print help string
for --got option.
(PARSE_AND_LIST_ARGS_CASES): Define shell variable. Handle --got
option.
* ld.texinfo: Document --got=<type> option.
* gen-doc.texi: Add M68K.
* NEWS: Mention the new feature.
ld/testsuite/
* ld-m68k/got-12.s: New file.
* ld-m68k/got-13.s: New file.
* ld-m68k/got-14.s: New file.
* ld-m68k/got-15.s: New file.
* ld-m68k/got-34.s: New file.
* ld-m68k/got-35.s: New file.
* ld-m68k/got-single-12-ok.d: New dump test.
* ld-m68k/got-single-13-er.d: New dump test.
* ld-m68k/got-negative-14-ok.d: New dump test.
* ld-m68k/got-negative-15-er.d: New dump test.
* ld-m68k/got-negative-12-13-14-34-ok.d: New dump test.
* ld-m68k/got-negative-12-13-14-35-er.d: New dump test.
* ld-m68k/got-multigot-14-ok.d: New dump test.
* ld-m68k/got-multigot-15-er.d: New dump test.
* ld-m68k/got-multigot-12-13-14-34-35-ok.d: New dump test.
* ld-m68k/xgot-15.s: New source.
* ld-m68k/got-xgot-15-ok.d: New test.
* ld-m68k/got-xgot-12-13-14-15-34-35-ok.d: New test.
* ld-m68k/m68k.exp: Run new tests.
2008-05-21 20:01:37 +08:00
|
|
|
|
|
2008-09-07 12:02:31 +08:00
|
|
|
|
* The ARM EABI linker will now generate stubs for function calls to symbols
|
|
|
|
|
|
that are too far away. The placement of the stubs is controlled by a new
|
2018-07-02 18:18:24 +08:00
|
|
|
|
linker command-line option: --stub-group-size=N.
|
2008-05-21 16:09:38 +08:00
|
|
|
|
|
2007-08-10 21:21:40 +08:00
|
|
|
|
Changes in 2.18:
|
|
|
|
|
|
|
2007-07-06 22:09:45 +08:00
|
|
|
|
* Linker sources now released under version 3 of the GNU General Public
|
|
|
|
|
|
License.
|
|
|
|
|
|
|
2007-07-10 05:25:34 +08:00
|
|
|
|
* ELF: New --build-id option to generate a unique per-binary identifier
|
|
|
|
|
|
embedded in a note section.
|
|
|
|
|
|
|
2007-06-29 22:09:34 +08:00
|
|
|
|
* Added support for National Semicondutor CompactRISC (ie CR16) target.
|
2007-06-30 02:44:09 +08:00
|
|
|
|
|
2007-03-30 01:16:05 +08:00
|
|
|
|
* -l:foo now searches the library path for a filename called foo,
|
|
|
|
|
|
without converting it to libfoo.a or libfoo.so.
|
|
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* Add a new command-line option '--default-script=FILE' or '-dT FILE'
|
2007-01-19 22:51:27 +08:00
|
|
|
|
which specifies a replacement for the built in, default linker
|
|
|
|
|
|
script.
|
|
|
|
|
|
|
2007-01-16 22:56:32 +08:00
|
|
|
|
* ELF: Add -Bsymbolic-functions, --dynamic-list-cpp-new, which puts C++
|
|
|
|
|
|
operator new and delete on the dynamic list, and --dynamic-list-data,
|
|
|
|
|
|
builtin list for --dynamic-list, which puts global data symbols on the
|
|
|
|
|
|
dynamic list.
|
|
|
|
|
|
|
2006-09-20 19:35:11 +08:00
|
|
|
|
* Add support for x86_64 PE+ target.
|
|
|
|
|
|
|
2006-09-17 07:51:50 +08:00
|
|
|
|
* Add support for Score target.
|
|
|
|
|
|
|
2006-09-08 01:16:34 +08:00
|
|
|
|
* ELF: Add --dynamic-list option to specify a list of global symbols
|
|
|
|
|
|
whose references shouldn't be bound to the definition within the
|
|
|
|
|
|
shared library, or a list of symbols which should be added to the
|
|
|
|
|
|
symbol table in the executable.
|
|
|
|
|
|
|
2006-08-22 15:41:05 +08:00
|
|
|
|
* The default output section LMA has changed for allocatable sections from
|
|
|
|
|
|
being equal to VMA, to keeping the difference between LMA and VMA the same as
|
|
|
|
|
|
the previous output section in the same region. This is a more useful
|
|
|
|
|
|
default when using overlays and other cases where you specify an LMA
|
|
|
|
|
|
differing from the VMA for some sections.
|
|
|
|
|
|
|
2006-08-04 22:53:26 +08:00
|
|
|
|
* New switch: --print-gc-sections to list any sections removed by garabge
|
|
|
|
|
|
collection.
|
|
|
|
|
|
|
2007-01-30 00:28:40 +08:00
|
|
|
|
* ARM: Added --vfp11-denorm-fix option to work around an erratum in current
|
2007-07-06 22:09:45 +08:00
|
|
|
|
VFP11 coprocessors.
|
2007-01-30 00:28:40 +08:00
|
|
|
|
|
2006-08-04 22:53:26 +08:00
|
|
|
|
Changes in 2.17:
|
2002-07-17 22:15:52 +08:00
|
|
|
|
|
2006-02-17 22:36:28 +08:00
|
|
|
|
* Support for the Infineon XC16X has been added by KPIT Cummins Infosystems.
|
|
|
|
|
|
|
2006-04-05 23:40:40 +08:00
|
|
|
|
* Modify the Linux linker search order to better match ld.so search order.
|
|
|
|
|
|
Look for DT_NEEDED libraries in paths specified by ld.so.conf before
|
|
|
|
|
|
searching the default directories, rather than vice versa.
|
|
|
|
|
|
Use $prefix/etc/ld.so.conf if it exists, otherwise /etc/ld.so.conf.
|
2006-02-09 09:05:10 +08:00
|
|
|
|
|
2006-02-01 06:13:41 +08:00
|
|
|
|
* PE-COFF: Forward exports from DLL's can now be specified in .def files
|
|
|
|
|
|
passed directly to ld.
|
|
|
|
|
|
|
2005-10-26 01:40:19 +08:00
|
|
|
|
* Support for the Z80 processor family has been added.
|
|
|
|
|
|
|
2005-10-13 08:57:43 +08:00
|
|
|
|
* Add support for the "@<file>" syntax to the command line, so that extra
|
|
|
|
|
|
switches can be read from <file>.
|
|
|
|
|
|
|
2005-03-16 01:49:15 +08:00
|
|
|
|
Changes in 2.16:
|
|
|
|
|
|
|
2005-01-29 01:24:41 +08:00
|
|
|
|
* Support for the R_ARM_V4BX relocation as defined in the ARM AAELF
|
|
|
|
|
|
specification has been added via the --fix-v4bx command-line option.
|
|
|
|
|
|
|
2005-01-21 20:04:25 +08:00
|
|
|
|
* New linker script construct AS_NEEDED(), which sets the --as-needed flag
|
|
|
|
|
|
for input files listed inside of it.
|
|
|
|
|
|
|
2005-01-19 19:42:49 +08:00
|
|
|
|
* A new command-line option, --sysroot, can be used to override the
|
|
|
|
|
|
default sysroot location. It only applies to toolchains that were
|
|
|
|
|
|
configured using --with-sysroot.
|
|
|
|
|
|
|
2004-11-19 17:31:55 +08:00
|
|
|
|
* New linker script functions: ORIGIN() and LENGTH() which return information
|
|
|
|
|
|
about a specified memory region.
|
|
|
|
|
|
|
2004-11-08 21:17:43 +08:00
|
|
|
|
* Port to MAXQ processor contributed by HCL Tech.
|
|
|
|
|
|
|
2004-10-27 02:41:52 +08:00
|
|
|
|
* Added SEGMENT_START to the linker script language to permit the user to
|
|
|
|
|
|
override the base address for a segment from the command-line.
|
|
|
|
|
|
|
2004-10-07 22:45:24 +08:00
|
|
|
|
* ELF: --warn-shared-textrel option to warn if adding a DT_TEXTREL to a shared
|
|
|
|
|
|
object.
|
|
|
|
|
|
|
2004-10-05 00:45:51 +08:00
|
|
|
|
* Added SORT_BY_NAME and SORT_BY_ALIGNMENT to the linker script
|
|
|
|
|
|
language to permit sorting sections by section name or section
|
|
|
|
|
|
maximum alignment.
|
|
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* Added a new linker command-line switch, --sort-section name|alignment,
|
2004-10-05 00:45:51 +08:00
|
|
|
|
to sort sections by section name or maximum alignment.
|
|
|
|
|
|
|
2004-10-07 22:45:24 +08:00
|
|
|
|
* ELF: --add-needed/--no-add-needed options to control if a DT_NEEDED tag
|
|
|
|
|
|
should be added when a shared library comes from DT_NEEDED tags.
|
2004-07-20 03:14:51 +08:00
|
|
|
|
|
2004-07-08 01:28:53 +08:00
|
|
|
|
* Support for the crx-elf target added.
|
|
|
|
|
|
|
2004-07-09 20:32:35 +08:00
|
|
|
|
* Support for the sh-symbianelf target added.
|
2004-07-08 01:28:53 +08:00
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* A new linker command-line switch has been added which allows the hash table
|
2004-05-21 23:38:04 +08:00
|
|
|
|
size to be set to a suitable prime value near to its argument. This switch
|
|
|
|
|
|
is --hash-size=<NUMBER>. Also if the switch --reduce-memory-overheads is
|
|
|
|
|
|
used, and --hash-size has not been used, then the default value will be set
|
|
|
|
|
|
to 1021.
|
|
|
|
|
|
|
2004-05-19 22:15:55 +08:00
|
|
|
|
* Linker map files are now generated with an O(N) algorithm for finding symbols
|
|
|
|
|
|
that are defined in each section. This uses about 40% more memory for
|
|
|
|
|
|
symbols than the old O(N^2) algorithm. You can use the new
|
|
|
|
|
|
--reduce-memory-overheads option to select the old algorithm; this option
|
|
|
|
|
|
might also be used in the future to select similar tradeoffs.
|
|
|
|
|
|
|
2004-05-21 23:38:04 +08:00
|
|
|
|
Changes in 2.15:
|
2004-07-20 03:14:51 +08:00
|
|
|
|
|
2004-10-07 22:45:24 +08:00
|
|
|
|
* ELF: --as-needed/--no-as-needed options to control if a DT_NEEDED tag should
|
|
|
|
|
|
be added only when a shared library is referenced.
|
2007-07-10 05:25:34 +08:00
|
|
|
|
|
2004-10-07 22:45:24 +08:00
|
|
|
|
* PE: --large-address-aware option to indicate executables support virtual
|
2004-05-07 23:17:58 +08:00
|
|
|
|
addresses greater than 2 gigabytes.
|
|
|
|
|
|
|
2004-05-07 22:49:48 +08:00
|
|
|
|
* DWARF 2 support for i386pe added.
|
|
|
|
|
|
|
2004-04-21 18:04:02 +08:00
|
|
|
|
* The linker script operator DEFINED() will now yield 1 only for a symbol that
|
|
|
|
|
|
is defined before the statement where DEFINED is used.
|
|
|
|
|
|
|
2004-04-21 08:44:36 +08:00
|
|
|
|
* The MIPS --embedded-relocs (used to embed relocations into binaries for
|
|
|
|
|
|
Embedded-PIC code) is deprecated and will be removed in a future release.
|
|
|
|
|
|
|
2004-03-30 22:04:32 +08:00
|
|
|
|
* cr16c support added by NSC.
|
|
|
|
|
|
|
2003-12-19 19:44:01 +08:00
|
|
|
|
* m32r Linux (ELF) support added by Renesas.
|
|
|
|
|
|
|
2003-08-20 16:37:19 +08:00
|
|
|
|
* Improved linker's handling of unresolved symbols. The switch
|
|
|
|
|
|
--unresolved-symbols=<method> has been added to tell the linker when it
|
|
|
|
|
|
should report them and the switch --warn-unresolved-symbols has been added to
|
|
|
|
|
|
make reports be issued as warning messages rather than errors.
|
|
|
|
|
|
|
2003-10-01 00:44:04 +08:00
|
|
|
|
Changes in 2.14:
|
|
|
|
|
|
|
2003-04-03 15:37:41 +08:00
|
|
|
|
* Added support for Xtensa architecture.
|
|
|
|
|
|
|
2003-01-07 00:14:01 +08:00
|
|
|
|
* Added --with-sysroot configure switch to specify a target system root, for
|
|
|
|
|
|
linking against a target filesystem image.
|
|
|
|
|
|
|
2002-12-23 18:45:03 +08:00
|
|
|
|
* Added --accept-unknown-linker-format to restore old linker behaviour (pre
|
|
|
|
|
|
2.14) of silently accepting and linking in any files in an unknown binary
|
|
|
|
|
|
file format.
|
|
|
|
|
|
|
2002-10-23 21:24:10 +08:00
|
|
|
|
* Added --no-omagic to undo the effects of the -N option.
|
|
|
|
|
|
|
2002-09-11 22:42:45 +08:00
|
|
|
|
* Support for Texas Instruments TMS320C4x and TMS320C3x series of
|
|
|
|
|
|
DSP's contributed by Michael Hayes and Svein E. Seldal.
|
2007-07-10 05:25:34 +08:00
|
|
|
|
|
2002-08-23 16:03:32 +08:00
|
|
|
|
* Added --with-lib-path configure switch to specify default value for
|
|
|
|
|
|
LIB_PATH.
|
|
|
|
|
|
|
2002-07-31 01:32:30 +08:00
|
|
|
|
* ARM port to QNX operating system added by Graeme Peterson.
|
|
|
|
|
|
|
2002-07-17 22:15:52 +08:00
|
|
|
|
* IP2K support added by Denis Chertykov.
|
|
|
|
|
|
|
2002-07-16 15:58:34 +08:00
|
|
|
|
Changes in 2.13:
|
|
|
|
|
|
|
|
|
|
|
|
* Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400
|
|
|
|
|
|
and FR500 included.
|
2002-06-19 05:17:27 +08:00
|
|
|
|
|
2002-05-30 10:58:04 +08:00
|
|
|
|
Changes in version 2.13:
|
|
|
|
|
|
|
|
|
|
|
|
* DEC VAX ELF support, by Matt Thomas.
|
|
|
|
|
|
|
2002-02-20 18:46:54 +08:00
|
|
|
|
Changes in version 2.12:
|
|
|
|
|
|
|
2002-02-15 12:04:03 +08:00
|
|
|
|
* Support for Don Knuth's MMIX, by Hans-Peter Nilsson.
|
|
|
|
|
|
|
2002-02-01 01:33:08 +08:00
|
|
|
|
* Support for the OpenRISC 32-bit embedded processor by OpenCores.
|
|
|
|
|
|
|
2001-10-03 23:11:48 +08:00
|
|
|
|
* Support for -z nocopyreloc in the x86 ELF linker, which disables
|
|
|
|
|
|
production of copy relocs. Warning: using this option may result in
|
|
|
|
|
|
non-sharable applications.
|
2000-09-06 08:13:34 +08:00
|
|
|
|
|
2001-08-23 23:14:18 +08:00
|
|
|
|
* Support for -z combreloc in the ELF linker, which puts dynamic
|
|
|
|
|
|
relocations against the same symbol together, so that dynamic linker
|
|
|
|
|
|
can use an one-entry symbol lookup cache.
|
|
|
|
|
|
|
|
|
|
|
|
* Support for ELF SHF_MERGE section merging, by Jakub Jelinek.
|
|
|
|
|
|
|
2002-02-20 18:46:54 +08:00
|
|
|
|
Changes in version 2.11:
|
|
|
|
|
|
|
2000-12-11 21:49:46 +08:00
|
|
|
|
* Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs.
|
|
|
|
|
|
|
2000-09-03 05:35:47 +08:00
|
|
|
|
* Support added for eliminating duplicate DWARF2 debug information by
|
|
|
|
|
|
having the compiler generate the information in sections called
|
|
|
|
|
|
.gnu.linkonce.wi.XXXX where XXXX is a checksum for the contents. The
|
|
|
|
|
|
linker then merges these sections together into the normal .debug_info
|
|
|
|
|
|
section.
|
1999-05-03 15:29:11 +08:00
|
|
|
|
|
2000-08-23 03:34:37 +08:00
|
|
|
|
* The native ELF linker now searches the directories in DT_RUNPATH or
|
|
|
|
|
|
DT_RPATH of a shared library for shared libraries needed by it.
|
|
|
|
|
|
|
2000-06-20 21:31:59 +08:00
|
|
|
|
* TI C54x support, by Timothy Wall.
|
|
|
|
|
|
|
2018-07-02 18:18:24 +08:00
|
|
|
|
* Added command-line switch --section-start to set the start address of any
|
2007-07-10 05:25:34 +08:00
|
|
|
|
specified section.
|
2000-05-23 05:58:40 +08:00
|
|
|
|
|
2000-05-18 03:38:53 +08:00
|
|
|
|
* Added ability to emit full relocation information in linked executables,
|
|
|
|
|
|
enabled by --emit-relocs. Some post-linkage optimization tools need
|
|
|
|
|
|
this information in order to be able to correctly identify and perform
|
|
|
|
|
|
symbol relative addressing in the event of changes in section contents
|
|
|
|
|
|
(instructions being added or deleted, extending data sections, etc.)
|
|
|
|
|
|
|
2000-08-15 02:50:13 +08:00
|
|
|
|
* Support for i860, by Jason Eckhardt (preliminary, alpha quality).
|
|
|
|
|
|
|
2000-08-25 01:42:52 +08:00
|
|
|
|
* Support for CRIS (Axis Communications ETRAX series).
|
|
|
|
|
|
|
2002-07-31 17:59:03 +08:00
|
|
|
|
* Support for PDP-11 and 2.11BSD a.out format, by Lars Brinkhoff.
|
|
|
|
|
|
|
2000-06-19 10:36:45 +08:00
|
|
|
|
Changes in version 2.10:
|
|
|
|
|
|
|
2007-07-10 05:25:34 +08:00
|
|
|
|
* Added AT> to the linker script language to allow load-time allocation of
|
2000-04-08 01:04:19 +08:00
|
|
|
|
sections into regions.
|
|
|
|
|
|
|
2007-07-10 05:25:34 +08:00
|
|
|
|
* Added garbage collection of unused sections, enabled by --gc-sections.
|
1999-05-03 15:29:11 +08:00
|
|
|
|
It does require a bit of backend support; currently implemented are
|
2000-06-24 12:48:41 +08:00
|
|
|
|
arm-elf, avr-elf, d10v-elf, fr30-elf, i386-elf, m32r-elf, m68k-elf,
|
|
|
|
|
|
mcore-elf, mips-elf, mn10300-elf, ppc-elf, sh-elf, sparc-elf, and v850-elf.
|
2000-06-19 10:05:53 +08:00
|
|
|
|
Others will ignore the option.
|
1999-05-03 15:29:11 +08:00
|
|
|
|
|
|
|
|
|
|
* Added SORT to the linker script language to permit sorting sections by file
|
|
|
|
|
|
name or section name.
|
|
|
|
|
|
|
|
|
|
|
|
* Added EXTERN to the linker script language as an equivalent to the -u
|
|
|
|
|
|
command-line option.
|
|
|
|
|
|
|
|
|
|
|
|
* Added ASSERT to the linker script language.
|
|
|
|
|
|
|
1999-06-13 18:20:50 +08:00
|
|
|
|
* Added EXCLUDE_FILE to the linker script language for further control over
|
|
|
|
|
|
wildcard file names.
|
|
|
|
|
|
|
1999-05-03 15:29:11 +08:00
|
|
|
|
* Added -O option to optimize linker output (as of this writing, this only
|
2002-07-31 17:59:03 +08:00
|
|
|
|
affects ELF shared library generation).
|
1999-05-03 15:29:11 +08:00
|
|
|
|
|
|
|
|
|
|
* The -e option now accepts a number as well as a symbol name.
|
|
|
|
|
|
|
1999-06-14 03:25:57 +08:00
|
|
|
|
* Added --no-undefined option to disallow undefined symbols when creating a
|
|
|
|
|
|
shared library.
|
|
|
|
|
|
|
2000-03-02 09:26:27 +08:00
|
|
|
|
* The linker now issues a warning, not an error, for an undefined symbol when
|
|
|
|
|
|
using -Bsymbolic; use the new --no-undefined option to get the old
|
|
|
|
|
|
behaviour.
|
|
|
|
|
|
|
1999-05-03 15:29:11 +08:00
|
|
|
|
* Added --demangle and --no-demangle options.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.9:
|
|
|
|
|
|
|
|
|
|
|
|
* Added SQUAD to the linker script language.
|
|
|
|
|
|
|
|
|
|
|
|
* New option --no-warn-mismatch.
|
|
|
|
|
|
|
|
|
|
|
|
* The MEMORY command now parses the attributes to determine where sections that
|
|
|
|
|
|
are not placed in a specific memory region are placed.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.8:
|
|
|
|
|
|
|
|
|
|
|
|
* Linker scripts may now contain shell wildcard characters for file and section
|
|
|
|
|
|
names.
|
|
|
|
|
|
|
|
|
|
|
|
* The linker now supports symbol versions in ELF.
|
|
|
|
|
|
|
|
|
|
|
|
* The NOCROSSREFS command was added to the linker script language.
|
|
|
|
|
|
|
|
|
|
|
|
* The LOADADDR expression was added to the linker script language.
|
|
|
|
|
|
|
|
|
|
|
|
* MAX and MIN functions were added to the linker script language.
|
|
|
|
|
|
|
|
|
|
|
|
* The OVERLAY construct was added to the linker script language.
|
|
|
|
|
|
|
|
|
|
|
|
* New option --warn-section-align to warn when the address of an output section
|
|
|
|
|
|
changes due to alignment of an input section.
|
|
|
|
|
|
|
|
|
|
|
|
* New options --filter/-F and --auxiliary/-f.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.7:
|
|
|
|
|
|
|
|
|
|
|
|
* New option --cref to print out a cross reference table.
|
|
|
|
|
|
|
|
|
|
|
|
* New option --wrap SYMBOL.
|
|
|
|
|
|
|
|
|
|
|
|
* New option --no-whole-archive, to turn off the effect of --whole-archive.
|
|
|
|
|
|
|
|
|
|
|
|
* Input sections assigned to the output section /DISCARD/ in the linker script
|
|
|
|
|
|
are not included in the output file.
|
|
|
|
|
|
|
|
|
|
|
|
* The SunOS and ELF linkers now merge stabs debugging information which uses
|
|
|
|
|
|
the N_BINCL and N_EINCL stab types. This reduces the amount of debugging
|
|
|
|
|
|
information generated.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.6:
|
|
|
|
|
|
|
|
|
|
|
|
* When an ELF section name is representable as a C identifier (this is not true
|
2008-05-21 20:16:22 +08:00
|
|
|
|
of most ELF section names), the linker will automatically define symbols
|
|
|
|
|
|
__start_SECNAME and __stop_SECNAME, where SECNAME is the section name, at the
|
|
|
|
|
|
beginning and the end of the section. This is used by glibc.
|
|
|
|
|
|
|
|
|
|
|
|
Addendum: Current versions of the linker (at least for version 2.18 onwards
|
|
|
|
|
|
and possibly much earlier as well) place two restrictions on this feature: The
|
|
|
|
|
|
symbols are only implemented for orphaned sections, not for explicitly placed
|
|
|
|
|
|
sections and they are PROVIDEd rather than being defined.
|
1999-05-03 15:29:11 +08:00
|
|
|
|
|
|
|
|
|
|
* When an ELF section named .gnu.warning is encountered in an input file, the
|
|
|
|
|
|
contents of the section are displayed as an error message, and the section is
|
|
|
|
|
|
not copied into the output file. This is used by glibc.
|
|
|
|
|
|
|
|
|
|
|
|
* When an ELF section named .gnu.warning.SYMBOL is encountered in an input
|
|
|
|
|
|
file, and the symbol SYMBOL is referenced by some object file, the contents of
|
|
|
|
|
|
the section are displayed as an error message. The section is not copied into
|
2003-06-25 14:40:27 +08:00
|
|
|
|
the output file, unless doing a relocatable or shared link. This is used by
|
1999-05-03 15:29:11 +08:00
|
|
|
|
glibc.
|
|
|
|
|
|
|
|
|
|
|
|
* New options -split-by-reloc and -split-by-file.
|
|
|
|
|
|
|
|
|
|
|
|
* The linker now supports linking PIC compiled code on SPARC SunOS. It can
|
|
|
|
|
|
also create SPARC SunOS shared libraries, and, like the native SunOS linker,
|
|
|
|
|
|
will do so whenever there is an undefined symbol in the link and neither the -e
|
|
|
|
|
|
nor the -r option was used.
|
|
|
|
|
|
|
|
|
|
|
|
* The -rpath option may be used on SunOS to set the list of directories to be
|
|
|
|
|
|
searched at run time. This overrides the default of building the list from the
|
|
|
|
|
|
-L options.
|
|
|
|
|
|
|
|
|
|
|
|
* The COFF linker now combines debugging information for structs, unions, and
|
|
|
|
|
|
enums, so that even if the same type is defined in multiple input files it will
|
|
|
|
|
|
only be defined once in the output file. The --traditional-format switch will
|
|
|
|
|
|
prevent this optimization.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.5:
|
|
|
|
|
|
|
|
|
|
|
|
* The linker now supports linking against SunOS shared libraries. It still can
|
|
|
|
|
|
not link SunOS PIC (Position Independent Code) files, so it can not be used to
|
2003-10-26 00:26:30 +08:00
|
|
|
|
generate shared libraries.
|
1999-05-03 15:29:11 +08:00
|
|
|
|
|
|
|
|
|
|
* The linker now supports linking against ELF shared libraries for the i386
|
|
|
|
|
|
(UnixWare) and SPARC (Solaris). It can also link ELF PIC files, and can be
|
|
|
|
|
|
used to generate shared libraries. Shared library generation is not well
|
|
|
|
|
|
tested; please report any problems encountered. The linker is now enabled for
|
|
|
|
|
|
Solaris again.
|
|
|
|
|
|
|
|
|
|
|
|
* Eric Youngdale has contributed Linux support code, including linking against
|
|
|
|
|
|
Linux a.out shared libraries. The linker produces Linux QMAGIC binaries.
|
|
|
|
|
|
|
|
|
|
|
|
* The ELF backend has been converted to the new linker code. To use the new
|
|
|
|
|
|
ELF linker, each particular target requires a relocation function. So far,
|
|
|
|
|
|
this function has been written for i386 (UnixWare), SPARC (Solaris) MIPS (Irix
|
|
|
|
|
|
5), and HPPA ELF targets.
|
|
|
|
|
|
|
|
|
|
|
|
* The -( (--start-group) and -) (--end-group) options have been added to
|
|
|
|
|
|
support searching a group of archives as though they were a single archive.
|
|
|
|
|
|
This can also be used in a linker script, as GROUP ( files ).
|
|
|
|
|
|
|
|
|
|
|
|
* When a file is named on the command line, and the linker does not recognize
|
|
|
|
|
|
it as an object file, the linker will now treat the file as a linker script
|
|
|
|
|
|
file. A linker script named in this way augments, but does not replace, the
|
|
|
|
|
|
default linker script.
|
|
|
|
|
|
|
|
|
|
|
|
* The -warn-once option was added. It causes the linker to only warn once per
|
|
|
|
|
|
undefined symbol, rather than once per reference.
|
|
|
|
|
|
|
|
|
|
|
|
* The COFF backend has been converted to the new linker code. As with ELF, to
|
|
|
|
|
|
use the new linker, each particular target requires a relocation function. So
|
|
|
|
|
|
far, this function has been written for the i386, m68k, a29k and SH targets.
|
|
|
|
|
|
|
|
|
|
|
|
* The -V flag was made a synonym for -v, for SVR4 compatibility. The old -V
|
|
|
|
|
|
behaviour is available via --verbose.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.4:
|
|
|
|
|
|
|
|
|
|
|
|
* New linker code, by Steve Chamberlain and Ian Taylor. For a.out and ecoff
|
|
|
|
|
|
formats (so far), this should result in considerable savings in time
|
|
|
|
|
|
and memory used while linking; slightly poorer performance than
|
|
|
|
|
|
before for formats not converted yet.
|
|
|
|
|
|
|
|
|
|
|
|
* Command-line parsing is no longer done with flex. This means
|
|
|
|
|
|
oddball characters in filenames won't get treated as argument
|
|
|
|
|
|
separators.
|
|
|
|
|
|
|
|
|
|
|
|
* HP-PA ELF support, by Jeff Law. (No SOM support yet.)
|
|
|
|
|
|
|
|
|
|
|
|
* Mach i386 support, by David Mackenzie.
|
|
|
|
|
|
|
|
|
|
|
|
* Irix 4 shared libraries are now supported (Irix 5 uses ELF, and ELF shared
|
|
|
|
|
|
libraries are not yet supported).
|
|
|
|
|
|
|
|
|
|
|
|
* COFF shared libraries (as on SCO) should work as well.
|
|
|
|
|
|
|
|
|
|
|
|
* The linker is disabled for Solaris. (Actually, it was in 2.3 also, I just
|
|
|
|
|
|
forgot to note it.) Some of their C library routines don't work when
|
|
|
|
|
|
statically linked, and the GNU linker doesn't support dynamic linking yet.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.3:
|
|
|
|
|
|
|
|
|
|
|
|
* Weak symbols are now supported.
|
|
|
|
|
|
|
|
|
|
|
|
* ELF support has been added. The linker has been bootstrapped on
|
|
|
|
|
|
UnixWare and Solaris.
|
|
|
|
|
|
|
|
|
|
|
|
* Alpha OSF/1 support has been added (non dynamic linking only).
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.2:
|
|
|
|
|
|
|
|
|
|
|
|
* The `bfd' library has been updated to reduce a.out-format string
|
|
|
|
|
|
table size. The effect of this is that files linked from many input
|
|
|
|
|
|
files with duplicate symbols (`-g' debugging records, or identical
|
|
|
|
|
|
static symbols) should be much smaller.
|
|
|
|
|
|
|
|
|
|
|
|
Changes in version 2.1:
|
|
|
|
|
|
|
|
|
|
|
|
* The ld -ySYMBOL flag (to trace references to SYMBOL) is now implemented.
|
|
|
|
|
|
|
|
|
|
|
|
* There is now support for writing ECOFF files, so ld and the
|
|
|
|
|
|
other utilities should work on Risc/Ultrix and Irix.
|
|
|
|
|
|
|
|
|
|
|
|
|
2020-01-01 15:57:01 +08:00
|
|
|
|
Copyright (C) 2012-2020 Free Software Foundation, Inc.
|
2012-12-18 00:56:12 +08:00
|
|
|
|
|
|
|
|
|
|
Copying and distribution of this file, with or without modification,
|
|
|
|
|
|
are permitted in any medium without royalty provided the copyright
|
|
|
|
|
|
notice and this notice are preserved.
|
|
|
|
|
|
|
1999-05-03 15:29:11 +08:00
|
|
|
|
Local variables:
|
|
|
|
|
|
fill-column: 79
|
|
|
|
|
|
End:
|
