If given input sections with differing flags, we'd like to place the
section according to the final output section flags.
bfd/
PR ld/19162
* elflink.c (_bfd_elf_gc_mark_reloc): Move code iterating over
linker input bfds..
* section.c (bfd_get_next_section_by_name): ..to here. Add ibfd param.
(bfd_get_linker_section): Adjust bfd_get_next_section_by_name call.
* tekhex.c (first_phase): Likewise.
* elflink.c (bfd_elf_gc_sections): Likewise.
* bfd-in2.h: Regenerate.
ld/
PR ld/19162
* emultempl/elf32.em (gld${EMULATION_NAME}_place_orphan): Check flags
before calling _bfd_elf_match_sections_by_type. Merge flags for
any other input sections that might match a new output section to
decide placement.
bfd * bfd-in2.h: Regenerate.
* bfd-in.h (bfd_arm_stm32l4xx_fix): New enum. Specify how
STM32L4XX instruction scanning should be done.
(bfd_elf32_arm_set_stm32l4xx_fix)
(bfd_elf32_arm_stm32l4xx_erratum_scan)
(bfd_elf32_arm_stm32l4xx_fix_veneer_locations): Add prototypes.
(bfd_elf32_arm_set_target_relocs): Add stm32l4xx fix type argument
to prototype.
* elf32-arm.c (STM32L4XX_ERRATUM_VENEER_SECTION_NAME)
(STM32L4XX_ERRATUM_VENEER_ENTRY_NAME): Define macros.
(elf32_stm32l4xx_erratum_type): New enum.
(elf32_stm32l4xx_erratum_list): New struct. List of veneers or
jumps to veneers.
(_arm_elf_section_data): Add stm32l4xx_erratumcount,
stm32l4xx_erratumlist.
(elf32_arm_link_hash_table): Add stm32l4xx_erratum_glue_size,
stm32l4xx_fix and num_stm32l4xx_fixes fields.
(ctz): New function.
(popcount): New function.
(elf32_arm_link_hash_table_create): Initialize stm32l4xx_fix.
(put_thumb2_insn): New function.
(STM32L4XX_ERRATUM_LDM_VENEER_SIZE): Define. Size of a veneer for
LDM instructions.
(STM32L4XX_ERRATUM_VLDM_VENEER_SIZE): Define. Size of a veneer for
VLDM instructions.
(bfd_elf32_arm_allocate_interworking_sections): Initialise erratum
glue section.
(record_stm32l4xx_erratum_veneer) : New function. Create a single
veneer, and its associated symbols.
(bfd_elf32_arm_add_glue_sections_to_bfd): Add STM32L4XX erratum glue.
(bfd_elf32_arm_set_stm32l4xx_fix): New function. Set the type of
erratum workaround required.
(bfd_elf32_arm_stm32l4xx_fix_veneer_locations): New function. Find
out where veneers and branches to veneers have been placed in
virtual memory after layout.
(is_thumb2_ldmia): New function.
(is_thumb2_ldmdb): Likewise.
(is_thumb2_vldm ): Likewise.
(stm32l4xx_need_create_replacing_stub): New function. Decide if a
veneer must be emitted.
(bfd_elf32_arm_stm32l4xx_erratum_scan): Scan the sections of an
input BFD for potential erratum-triggering insns. Record results.
(bfd_elf32_arm_set_target_relocs): Set stm32l4xx_fix field in
global hash table.
(elf32_arm_size_dynamic_sections): Collect glue information.
(create_instruction_branch_absolute): New function.
(create_instruction_ldmia): Likewise.
(create_instruction_ldmdb): Likewise.
(create_instruction_mov): Likewise.
(create_instruction_sub): Likewise.
(create_instruction_vldmia): Likewise.
(create_instruction_vldmdb): Likewise.
(create_instruction_udf_w): Likewise.
(create_instruction_udf): Likewise.
(push_thumb2_insn32): Likewise.
(push_thumb2_insn16): Likewise.
(stm32l4xx_fill_stub_udf): Likewise.
(stm32l4xx_create_replacing_stub_ldmia): New function. Expands the
replacing stub for ldmia instructions.
(stm32l4xx_create_replacing_stub_ldmdb): Likewise for ldmdb.
(stm32l4xx_create_replacing_stub_vldm): Likewise for vldm.
(stm32l4xx_create_replacing_stub): New function. Dispatches the
stub emission to the appropriate functions.
(elf32_arm_write_section): Output veneers, and branches to veneers.
ld * ld.texinfo: Description of the STM32L4xx erratum workaround.
* emultempl/armelf.em (stm32l4xx_fix): New.
(arm_elf_before_allocation): Choose the type of fix, scan for
erratum.
(gld${EMULATION_NAME}_finish): Fix veneer locations.
(arm_elf_create_output_section_statements): Propagate
stm32l4xx_fix value.
(PARSE_AND_LIST_PROLOGUE): Define OPTION_STM32L4XX_FIX.
(PARSE_AND_LIST_LONGOPTS): Add entry for handling
--fix-stm32l4xx-629360.
(PARSE_AND_LIST_OPTION): Add entry for helping on
--fix-stm32l4xx-629360.
(PARSE_AND_LIST_ARGS_CASES): Treat OPTION_STM32L4XX_FIX.
tests * ld-arm/arm-elf.exp (armelftests_common): Add STM32L4XX
tests.
* ld-arm/stm32l4xx-cannot-fix-far-ldm.d: New.
* ld-arm/stm32l4xx-cannot-fix-far-ldm.s: Likewise.
* ld-arm/stm32l4xx-cannot-fix-it-block.d: Likewise.
* ld-arm/stm32l4xx-cannot-fix-it-block.s: Likewise.
* ld-arm/stm32l4xx-fix-all.d: Likewise.
* ld-arm/stm32l4xx-fix-all.s: Likewise.
* ld-arm/stm32l4xx-fix-it-block.d: Likewise.
* ld-arm/stm32l4xx-fix-it-block.s: Likewise.
* ld-arm/stm32l4xx-fix-ldm.d: Likewise.
* ld-arm/stm32l4xx-fix-ldm.s: Likewise.
* ld-arm/stm32l4xx-fix-vldm.d: Likewise.
* ld-arm/stm32l4xx-fix-vldm.s: Likewise.
Makes these symbols defined before bfd_elf_size_dynamic_sections, to
avoid horrible hacks elsewhere. The exp_fold_tree undefweak change
is necessary to define undefweak symbols early too. The comment was
wrong. PROVIDE in fact defines undefweak symbols, via
bfd_elf_record_link_assignment.
PR ld/19175
* ldlang.c (lang_insert_orphan): Evaluate __start_* and __stop_*
symbol PROVIDE expressions.
* ldexp.c (exp_fold_tree_1 <etree_provide>): Define undefweak
references.
PR gas/19109
. * configure.ac: Note the 'none' is an acceptable argument to
--enable-compressed-debug-sections.
* configure: Regenerate.
gas * configure.ac: Restore --enable-compressed-debug-sections.
Do not enable compressed debug sections by default for x86 Linux
targets.
* configure: Regenerate.
ld * configure.ac: Add --enable-compressed-debug-sections.
* configure: Regenerate.
* config.in: Regenerate.
* ld.texinfo: Document how to determine the default action for
debug sections.
* ldmain.c (main): If DEFAULT_FLAG_COMPRESS_DEBUG is defined then
set the compress_debug field of the link_info structure to
zlib-gabi.
* lexsup.c (elf_static_list_options): Output the default setting
for the --compress-debug-sections option.
* NEWS: Mention the new configure option.
This fixes two problems. First, the --sysroot option wasn't available
with a ld configured without --with-sysroot, a historical accident.
This led to people configuring binutils with --with-sysroot=/ in order
to enable sysroot support, which exposes a case where ld wrongly
prepends the sysroot to a relative path.
PR ld/18992
* ldmain.c (main): Always enable --sysroot.
* emultempl/elf32.em (gld${EMULATION_NAME}_after_open): Don't
prepend sysroot to relative rpath/runpath.
Sometimes it may be of benefit to force use of the __tls_get_addr_opt
call stub even when the glibc being used during linking does not
advertise __tls_get_addr_opt.
bfd/
* elf64-ppc.h (struct ppc64_elf_params <tls_get_addr_opt>): Rename
from no_tls_get_addr_opt.
* elf64-ppc.c: Update for rename and inversion of tls_get_addr_opt.
(ppc64_elf_tls_setup): Set tls_get_addr_opt to 0 only when at
default of -1.
ld/
* emultempl/ppc64elf.em (params): Init tls_get_addr_opt field to -1.
(OPTION_TLS_GET_ADDR_OPT): Define.
(PARSE_AND_LIST_LONGOPTS): Handle --tls-get-addr-opt.
(PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Likewise.
* ld.texinfo: Document --tls-get-addr-optimize and
--no-tls-get-addr-optimize.
Giving linker script symbols defined outside of output sections a
section-relative value early, leads to them being used in expressions
as if they were defined inside an output section. This can mean loss
of the section VMA, and wrong results.
ld/
PR ld/18963
* ldexp.h (struct ldexp_control): Add rel_from_abs.
(ldexp_finalize_syms): Declare.
* ldexp.c (new_rel_from_abs): Keep absolute for expressions
outside of output section statements. Set rel_from_abs.
(make_abs, exp_fold_tree, exp_fold_tree_no_dot): Clear rel_from_abs.
(struct definedness_hash_entry): Add final_sec, and comment.
(update_definedness): Set final_sec.
(set_sym_sections, ldexp_finalize_syms): New functions.
* ldlang.c (lang_process): Call ldexp_finalize_syms.
ld/testsuite
PR ld/18963
* ld-scripts/pr18963.d,
* ld-scripts/pr18963.t: New test.
* ld-scripts/expr.exp: Run it.
* ld-elf/provide-hidden-2.ld: Explicitly make "dot" absolute.
* ld-mips-elf/gp-hidden.sd: Don't care about _gp section.
* ld-mips-elf/no-shared-1-n32.d: Don't care about symbol shown at
start of .data section.
* ld-mips-elf/no-shared-1-n64.d: Likewise.
* ld-mips-elf/no-shared-1-o32.d: Likewise.
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.
bfd/
* elf64-ppc.c (ppc64_elf_func_desc_adjust): Don't redefine .TOC.
if already defined, and set linker_def.
(ppc64_elf_set_toc): Use .TOC. value if defined other than by
the backend.
ld/
* ldexp.c (exp_fold_tree_1): Clear linker_def on symbol assignment.
Reverts a2c59f28 and e474ab13. Since the unary form of ALIGN only
references "dot" implicitly, there isn't really a strong argument for
making ALIGN use a relative value when inside an output section.
* ldexp.c (align_dot_val): Delete.
(fold_unary <ALIGN_K, NEXT>): Revert 2015-07-10 change.
(is_align_conditional): Revert 2015-07-20 change.
(exp_fold_tree_1): Likewise, but keep expanded comment.
* scripttempl/elf.sc (.ldata, .bss): Revert 2015-07-20 change.
* ld.texinfo (<ALIGN>): Correct description.
Add a new command line option '--require-defined' to the linker. This
option operates identically to the '--undefined' option, except that if
the symbol is not defined in the final output file then the linker will
exit with an error.
When making use of --gc-section, or just when trying to pull in parts of
a library, it is not uncommon for a user to use the '--undefined'
command line option to specify a symbol that the user then expects to be
defined by one of the object files supplied to the link.
However, if for any reason the symbol is not satisfied by an object
provided to the link the user will be left with an undefined symbol in
the output file, instead of a defined symbol.
In some cases the above behaviour is what the user wants, in other cases
though we can do better. The '--require-defined' option tries to fill
this gap. The symbol passed to the '--require-defined' option is
treated exactly as if the symbol was passed to '--undefined', however,
before the linker exits a check is made that all symbols passed to
'--require-defined' are actually defined, if any are not then the link
will fail with an error.
ld/ChangeLog:
* ld.texinfo (Options): Document --require-defined option.
* ldlang.c (struct require_defined_symbol): New structure.
(require_defined_symbol_list): New variable.
(ldlang_add_require_defined): New function.
(ldlang_check_require_defined_symbols): New function.
(lang_process): Check required symbols are defined.
* ldlang.h (ldlang_add_require_defined): Declare.
* ldlex.h (enum option_values): Add OPTION_REQUIRE_DEFINED_SYMBOL.
* lexsup.c (ld_options): Add '--require-defined' entry.
(parse_args): Handle '--require-defined' entry.
* NEWS: Mention new '--require-defined' option.
ld/testsuite/ChangeLog:
* ld-undefined/require-defined-1.d: New file.
* ld-undefined/require-defined-2.d: New file.
* ld-undefined/require-defined-3.d: New file.
* ld-undefined/require-defined-4.d: New file.
* ld-undefined/require-defined-5.d: New file.
* ld-undefined/require-defined.exp: New file.
* ld-undefined/require-defined.s: New file.
The linker documentation explicitly states that there can be only one
MEMORY command. This is not true. Multiple MEMORY commands are
allowed, the contents of all will be treated as if a single MEMORY
command was given.
Update the documentation to make this clear to the users.
ld/ChangeLog:
* ld.texinfo (MEMORY): Explain that multiple MEMORY commands are
acceptable.
This patch changes "ld -r" not to set link_info.executable. It
removes !info->relocatable check for info->executable and adds it
for !info->executable in elflink.c.
bfd/
* elflink.c (elf_link_add_object_symbols): Remove
!info->relocatable check for info->executable. Add
!info->relocatable check for !info->executable.
(elf_link_output_extsym): Remove
!info->relocatable check for info->executable.
ld/
* lexsup.c (parse_args): Don't set link_info.executable to
TRUE for link_info.relocatable.
gas * config/tc-rl78.c (rl78_abs_sym): New local variable.
(md_begin): Initialise the new symbol.
(OPIMM): Define the value to be relative to the new symbol and not
the absolute section symbol.
ld * emulparams/elf32rl78.sh (OTHER_SECTIONS): Provide a value for
the _-rl78_abs__ symbol.
tests * gas/all/struct.d: Allow for extra symbols in the output.
* gas/macros/test1.d: Likewise.
* gas/elf/elf.exp: Add an rl78 machine.
* gas/elf/sections2e-rl78: New file.
tests * binutils-all/localize-hidden-1.d: Allow for extra symbols in the
output.
* binutils-all/strip-11.d: Skip for the RL78.
More fallout from a2c59f28. This one could have been fixed by simply
using ". = ALIGN (ABSOLUTE (.), 2);" but it's nicer to align the
section.
* emulparams/criself.sh (INIT_ADDR, FINI_ADDR): Define.
(INIT_START, FINI_START): Don't ALIGN.
* scriptempl/elf.sc (.init, .fini): Apply INIT_ADDR/FINI_ADDR.
a2c59f28 changed the way the unary ALIGN behaved inside output sections,
resulting in cris-elf testsuite regressions. This patch pads out .bss
in the same manner as it was prior to the ALIGN change.
* scripttempl/elf.sc (.ldata, .bss): Align absolute value of dot.
* ldexp.c (is_align_conditional): Handle binary ALIGN.
(exp_fold_tree_1): Move code setting SEC_KEEP for assignments to
dot inside output sections. Handle absolute expressions.
All programs in binutils+gdb git repo now support gABI compression
with the SHF_COMPRESSED bit. This patch makes the zlib-gabi option
as compression default for gas, gold, ld and objcopy, instead of the
zlib-gnu option whose outputs are incompatible with gABI.
binutils/
* objcopy.c (copy_file): Set BFD_COMPRESS_GABI if not
zlib-gnu.
* doc/binutils.texi: Change --compress-debug-sections and
--compress-debug-sections=zlib to zlib-gabi.
binutils/testsuite/
* binutils-all/compress.exp: Update.
gas/
* as.c (parse_args): Make --compress-debug-sections and
--compress-debug-sections=zlib the same as
--compress-debug-sections=zlib-gabi.
* doc/as.texinfo: Change --compress-debug-sections and
--compress-debug-sections=zlib to zlib-gabi.
gold/
* compressed_output.cc (Output_compressed_section::set_final_data_size):
Make --compress-debug-sections=zlib the same as
--compress-debug-sections=zlib-gabi.
* testsuite/Makefile.am (flagstest_compress_debug_sections.check):
Expect ".debug_.*" with the SHF_COMPRESSED bit, instead of
".zdebug_".
* testsuite/Makefile.in: Regenerated.
ld/
* emultempl/elf32.em (gld${EMULATION_NAME}_handle_option): Make
--compress-debug-sections=zlib the same as
--compress-debug-sections=zlib-gabi.
* ld.texinfo: Change --compress-debug-sections=zlib to zlib-gabi.
ld/testsuite/
* ld-elf/zlibbegin.rS: Updated to .debug_.* with the
SHF_COMPRESSED bit.
* ld-elf/zlibnormal.rS: Likewise.
Inside output sections, ALIGN(.,x) uses a section-relative value for
dot. The unary ALIGN always used the absolute value of dot.
* ldexp.c (align_dot_val): New function.
(fold_unary <ALIGN_K, NEXT>): Use it.
