The direct references in objcopy kind of look like a hack to me, so
I'm calling these symbols internal too. Certainly they aren't named
and documented as a public BFD symbol today anyway.
So ... give these bfd-internal symbols with external linkage a _bfd_
prefix to avoid collisions in the global symbol namespace.
While at it, give them names that more closely match the corresponding
option name that toggles them.
Also while at it, fix a few related comment typos.
gdb/ChangeLog:
2017-02-17 Pedro Alves <palves@redhat.com>
* srec.c (Chunk): Rename to ...
(_bfd_srec_len): ... this.
(S3Forced): Rename to ...
(_bfd_srec_forceS3): ... this.
* objcopy.c: Adjust all references.
Give these bfd-internal symbols with external linkage a _bfd_ prefix
to avoid collisions in the global symbol namespace.
bfd/ChangeLog:
2017-02-17 Pedro Alves <palves@redhat.com>
* archive.c (bsd_write_armap): Rename to ...
(_bfd_bsd_write_armap): ... this.
(coff_write_armap): Rename to ...
(_bfd_coff_write_armap): ... this.
* libbfd-in.h (bsd_write_armap): Rename to ...
(_bfd_bsd_write_armap): ... this.
(coff_write_armap): Rename to ...
(_bfd_coff_write_armap): ... this.
* aout-target.h, aout-tic30.c: Adjust all users.
* libbfd.h: Regenerate.
Give this bfd-internal symbol with external linkage a _bfd_ prefix to
avoid collisions in the global symbol namespace.
bfd/ChangeLog:
2017-02-17 Pedro Alves <palves@redhat.com>
* bfd-in.h (bfd_read, bfd_write): Adjust to rename.
(warn_deprecated): Rename to ...
(_bfd_warn_deprecated): ... this.
* libbfd.c (warn_deprecated): Rename to ...
(_bfd_warn_deprecated): ... this.
* bfd-in2.h: Regenerate.
Give these bfd-internal symbols with external linkage a _bfd_ prefix
to avoid collisions in the global symbol namespace.
bfd/ChangeLog:
2017-02-17 Pedro Alves <palves@redhat.com>
* bfdio.c (real_ftell): Rename to ...
(_bfd_real_ftell): ... this.
(real_fseek): Rename to ...
(_bfd_real_fseek): ... this.
(real_fopen): Rename to ...
(_bfd_real_fopen): ... this.
* libbfd-in.h (real_ftell): Rename to ...
(_bfd_real_ftell): ... this.
(real_fseek): Rename to ...
(_bfd_real_fseek): ... this.
(real_fopen): Rename to ...
(_bfd_real_fopen): ... this.
* cache.c, dwarf2.c, opncls.c: Adjust all callers.
* libbfd.h: Regenerate.
Give these bfd-internal symbols with external linkage a _bfd_ prefix
to avoid collisions in the global symbol namespace.
bfd/ChangeLog:
2017-02-17 Pedro Alves <palves@redhat.com>
* dwarf2.c, elf-attrs.c, elf32-nds32.c: Adjust all callers.
* libbfd.c (read_unsigned_leb128): Rename to ...
(_bfd_read_unsigned_leb128): ... this.
(read_signed_leb128): Rename to ...
(_bfd_read_signed_leb128): ... this.
(safe_read_leb128): Rename to ...
(_bfd_safe_read_leb128): ... this.
* libbfd-in.h (read_unsigned_leb128): Rename to ...
(_bfd_read_unsigned_leb128): ... this.
(read_signed_leb128): Rename to ...
(_bfd_read_signed_leb128): ... this.
(safe_read_leb128): Rename to ...
(_bfd_safe_read_leb128): ... this.
* libbfd.h: Renegerate.
When looking up file and line information (used from the linker to
report error messages) if no symbol is passed in, then use the symbol
list to look for a matching symbol.
If a matching symbol is found then use this to look up the file / line
information.
This should improve errors when looking up file / line information for
data sections. Hopefully we should find a matching data symbol, which
should, in turn (we hope) match a DW_TAG_variable in the DWARF, this
should allow us to give accurate file / line errors for data symbols.
As the hope is to find a matching DW_TAG_variable in the DWARF then we
ignore section symbols, and prefer global symbols to locals.
bfd/ChangeLog:
* dwarf2.c (_bfd_dwarf2_find_nearest_line): Perform symbol lookup
before trying to fine matching file and line information.
ld/ChangeLog:
* testsuite/ld-elf/shared.exp: Update expected results.
* testsuite/ld-elf/dwarf2.err: Likewise
When parsing DWARF data in order to report file/line type error messages
we perform section placement to make section addresses unique within
relocatable object files.
Currently, if we reuse previously loaded (and cached) dwarf data then we
neglect to perform section placement, the result is that the section
addresses will not be unique, and we might, incorrectly associate an
address with the wrong debug information, and so report an incorrect
file and line number.
Further we neglect to check that that bfd for which we are looking up
debug information is actually the bfd for which the previous debug
information was loaded, it is possible that we will reuse previously
loaded debug information for a different bfd.
And finally, due to following of gnu_debuglink links in one bfd to
another, the process of checking that the cached debug information is
valid requires us to track the original bfd in the cached debug
information. The original debug information here is either the bfd that
we're interested in, not the bfd we finally load the debug information
from.
bfd/ChangeLog:
* dwarf2.c (struct dwarf2_debug): Add orig_bfd member.
(_bfd_dwarf2_slurp_debug_info): If stashed debug information does
not match current bfd, then reload debug information. Record bfd
we're loading debug info for in the stash. If we have debug
informatin in the cache then perform section placement before
returning.
ld/ChangeLog:
* testsuite/ld-elf/dwarf.exp (build_tests): Add new tests.
* testsuite/ld-elf/dwarf2.err: New file.
* testsuite/ld-elf/dwarf2a.c: New file.
* testsuite/ld-elf/dwarf2b.c: New file.
* testsuite/ld-elf/dwarf3.c: New file.
* testsuite/ld-elf/dwarf3.err: New file.
I misunderstood the hppa alias problem. File offsets of segments need
to be such that no page is mapped twice with different permissions.
(Which still seems to me like something the kernel could fix, but
anyhow, this is not so difficult to achieve in ld.)
PR 21000
bfd/
* elf-bfd.h (struct elf_backend_data): Add no_page_alias.
* elfxx-target.h (elf_backend_no_page_alias): Define.
(elfNN_bed): Init new field.
* elf.c (assign_file_positions_for_load_sections): If no_page_alias
ensure PT_LOAD segment starts on a new page.
* elf32-hppa.c (elf_backend_no_page_alias): Define.
ld/
* testsuite/ld-elf/loadaddr1.d: Adjust for hppa file offsets.
* testsuite/ld-elf/loadaddr2.d: Likewise.
* testsuite/ld-elf/loadaddr3a.d: Likewise.
* testsuite/ld-scripts/rgn-at5.d: Likewise.
This fixes a long-standing hppa bug seen when generating PIEs, and I
think possible to trigger with forced local symbols in shared
libraries. Not allocating enough space for PLT relocs results in ld
writing outside of the buffer.
PR 21132
* elf32-hppa.c (allocate_plt_static): Allocate space for relocs
if pic.
"lea foo@GOT, %reg" is OK in PIC since it only loads the GOT offset
into register, which can be used later with a GOT base register to
get the value in the GOT entry.
bfd/
PR ld/21168
* elf32-i386.c (elf_i386_relocate_section): Allow
"lea foo@GOT, %reg" in PIC.
ld/
PR ld/21168
* testsuite/ld-i386/i386.exp: Run pr21168.
* testsuite/ld-i386/pr21168a.c: New file.
* testsuite/ld-i386/pr21168b.S: Likewise.
bfd/
PR ld/20244
* elf32-i386.c (elf_i386_relocate_section): Properly get IFUNC
symbol name when reporting R_386_GOT32/R_386_GOT32X relocation
error against local IFUNC symbol without a base register for
PIC.
ld/
PR ld/20244
* testsuite/ld-i386/i386.exp: Run pr20244-4a, pr20244-4b and
pr20244-4c.
* testsuite/ld-i386/pr20244-4.s: New file.
* testsuite/ld-i386/pr20244-4a.d: Likewise.
* testsuite/ld-i386/pr20244-4b.d: Likewise.
* testsuite/ld-i386/pr20244-4c.d: Likewise.
Remove an inconsistency in BFD linker error messages across the PowerPC
backends, where in the presence of line information the `%P: %H:' format
sequence makes the first error message produced for any given function
different from subsequent ones.
Taking the `ld/testsuite/ld-powerpc/tocopt7.s' test case source as an
example and the `powerpc-linux' target we have:
$ as -gdwarf2 -o tocopt.o -a64 tocopt.s
$ ld -o tocopt -melf64ppc tocopt.o
ld: tocopt.o: In function `_start':
tocopt.s:35:(.text+0x14): toc optimization is not supported for 0x3fa00000 instruction.
ld: tocopt.s:49:(.text+0x34): toc optimization is not supported for 0x3fa00000 instruction.
$
where the first error message does not have the source file name
prefixed with the linker program executable's name, i.e. `ld:', whereas
the second error message does, as would any subsequent.
This is because with a multiple-line error message such as `%H' produces
`%P' only prints the program executable's name on the first line and not
any later ones. Also the PowerPC backend is the only part of BFD which
uses `%P' along with one of the clever `%C', `%D', `%G', `%H' format
specifiers. And last but not least this breaks a GNU Coding Standard's
requirement that error messages from compilers should look like this:
source-file-name:lineno: message
also quoted in `vfinfo' code handling these specifiers.
Convert `%P: %H:' to `%H:' in error messages across the PowerPC backends
then, yielding:
$ as -gdwarf2 -o tocopt.o -a64 tocopt.s
$ ld -o tocopt -melf64ppc tocopt.o
tocopt.o: In function `_start':
tocopt.s:35:(.text+0x14): toc optimization is not supported for 0x3fa00000 instruction.
tocopt.s:49:(.text+0x34): toc optimization is not supported for 0x3fa00000 instruction.
$
instead, making it consistent and matching the GNU Coding Standard's
requirement.
bfd/
* elf32-ppc.c (ppc_elf_check_relocs): Use `%H:' rather than
`%P: %H:' with `info->callbacks->einfo'.
(ppc_elf_relocate_section): Likewise.
* elf64-ppc.c (ppc64_elf_check_relocs): Likewise.
(ppc64_elf_edit_toc): Likewise.
(ppc64_elf_relocate_section): Likewise.
"_gp" could conflict with ABI-complient code. While it's probably OK
because MIPS uses this name, we figured it'd be good to clean this up
before a release with RISC-V in it.
ld/ChangeLog:
2017-02-13 Palmer Dabbelt <palmer@dabbelt.com>
* emulparams/elf32lriscv-defs.sh (SDATA_START_SYMBOLS): Change
_gp to __global_pointer$.
bfd/ChangeLog:
2017-02-13 Palmer Dabbelt <palmer@dabbelt.com>
* elfnn-riscv.c (riscv_global_pointer_value): Change _gp to
__global_pointer$.
bfd/ChangeLog
2017-02-07 Andrew Waterman <andrew@sifive.com>
* elfnn-riscv.c (riscv_elf_finish_dynamic_sections): Only write PLT
entry size if PLT header is written.
Fixes ld/testsuite/ld-elf/shared.exp "Build libpr16496b.so".
The root cause is in bfd/elf64-sparc.c, elf64_sparc_slurp_one_reloc_table(),
bfd_get_symcount() was used for dynamic mode as well. The fix is to use
bfd_get_dynamic_symcount().
This has been tested with sparc64-linux-gnu, and it does not introduce any
regressions.
bfd/ChangeLog:
2017-02-06 Sheldon Lobo <sheldon.lobo@oracle.com>
Fix sparc64 dynamic relocation processing to use the dynamic
symbol count.
* elf64-sparc.c (elf64_sparc_slurp_one_reloc_table): Use 'dynamic'
to determine if bfd_get_symcount() or bfd_get_dynamic_symcount()
should be used.
PR 21096
bfd * coffcode.h (coff_write_object_contents): Enlarge size of
s_name_buf in order to avoid compile time warning about possible
integer truncation.
* elf32-nds32.c (nds32_elf_ex9_import_table): Mask off lower
32-bits of insn value before printing into buffer.
opcodes * aarch64-opc.c (print_register_list): Ensure that the register
list index will fir into the tb buffer.
(print_register_offset_address): Likewise.
* tic6x-dis.c (print_insn_tic6x): Increase size of func_unit_buf.
Ensure all local symbols precede external symbols in the dynamic symbol
table.
No local symbols are expected to make it to the dynamic symbol table
except for section symbols already taken care of, so this is really a
safeguard only against a potential BFD bug otherwise not so harmful,
which may become a grave one due to a symbol table sorting requirement
violation (see PR ld/20828 for an example). This means however that no
test suite coverage is possible for this change as code introduced here
is not normally expected to trigger.
Logically split then the part of the dynamic symbol table which is not
global offset table mapped, into a local area at the beginning and an
external area following. By the time `mips_elf_sort_hash_table' is
called we have the number of local dynamic symbol table entries (section
and non-section) already counted in `local_dynsymcount', so use it to
offset the external area from the beginning.
bfd/
* elfxx-mips.c (mips_elf_hash_sort_data): Add
`max_local_dynindx'.
(mips_elf_sort_hash_table): Handle it.
(mips_elf_sort_hash_table_f) <GGA_NONE>: For forced local
symbols bump up `max_local_dynindx' rather than
`max_non_got_dynindx'.
Use the `bfd_size_type' data type for dynamic symbol table indices in
the MIPS backend, in line with generic code and removing the need to use
a cast.
bfd/
* elfxx-mips.c (mips_elf_hash_sort_data): Convert the
`min_got_dynindx', `max_unref_got_dynindx' and
`max_non_got_dynindx' members to the `bfd_size_type' data type.
(mips_elf_sort_hash_table): Adjust accordingly.
Make all hash table references throughout `mips_elf_sort_hash_table' use
`htab', simplifying code and improving readability.
bfd/
* elfxx-mips.c (mips_elf_sort_hash_table): Use `htab' throughout
to access the hash table.
Move the assertion on non-NULL `htab' in `mips_elf_sort_hash_table' to
the beginning, before the pointer is dereferenced (`mips_elf_hash_table
(info)' and `elf_hash_table (info)' both point to the same memory
location, differently typed).
bfd/
* elfxx-mips.c (mips_elf_sort_hash_table): Move assertion on
non-NULL `htab' to the beginning.
Complement commit 9d862524f6 ("MIPS: Verify the ISA mode and alignment
of branch and jump targets") and add GAS and LD options to control the
checks for invalid branches between ISA modes introduced there, to help
with some handwritten code lacking `.insn' annotation for labels used as
branch targets and code produced by older versions of GCC which suffers
from the issue with branches to code that has been optimized away,
addressed with GCC commit 242424 ("MIPS/GCC: Mark trailing labels with
`.insn'"), <https://gcc.gnu.org/ml/gcc-patches/2016-11/msg01061.html>.
bfd/
* elfxx-mips.h (_bfd_mips_elf_insn32): Rename prototype to...
(_bfd_mips_elf_linker_flags): ... this. Add another parameter.
* elfxx-mips.c (mips_elf_link_hash_table): Add
`ignore_branch_isa' member.
(mips_elf_perform_relocation): Do not treat an ISA mode mismatch
in branch relocation calculation as an error if
`ignore_branch_isa' has been set.
(_bfd_mips_elf_insn32): Rename to...
(_bfd_mips_elf_linker_flags): ... this. Rename the `on'
parameter to `insn32' and add an `ignore_branch_isa' parameter.
Handle the new parameter.
gas/
* config/tc-mips.c (mips_ignore_branch_isa): New variable.
(options): Add OPTION_IGNORE_BRANCH_ISA and
OPTION_NO_IGNORE_BRANCH_ISA enum values.
(md_longopts): Add "mignore-branch-isa" and
"mno-ignore-branch-isa" options.
(md_parse_option): Handle OPTION_IGNORE_BRANCH_ISA and
OPTION_NO_IGNORE_BRANCH_ISA.
(fix_bad_cross_mode_branch_p): Return FALSE if
`mips_ignore_branch_isa' has been set.
(md_show_usage): Add `-mignore-branch-isa' and
`-mno-ignore-branch-isa'.
* doc/as.texinfo (Target MIPS options): Add
`-mignore-branch-isa' and `-mno-ignore-branch-isa' options.
(-mignore-branch-isa, -mno-ignore-branch-isa): New options.
* doc/c-mips.texi (MIPS Options): Add `-mignore-branch-isa' and
`-mno-ignore-branch-isa' options.
* testsuite/gas/mips/branch-local-ignore-2.d: New test.
* testsuite/gas/mips/branch-local-ignore-3.d: New test.
* testsuite/gas/mips/branch-local-ignore-n32-2.d: New test.
* testsuite/gas/mips/branch-local-ignore-n32-3.d: New test.
* testsuite/gas/mips/branch-local-ignore-n64-2.d: New test.
* testsuite/gas/mips/branch-local-ignore-n64-3.d: New test.
* testsuite/gas/mips/mips.exp: Run the new tests.
ld/
* emultempl/mipself.em (ignore_branch_isa): New variable.
(mips_create_output_section_statements): Rename
`_bfd_mips_elf_insn32' called to `_bfd_mips_elf_linker_flags',
add `ignore_branch_isa' argument.
(PARSE_AND_LIST_PROLOGUE): Add OPTION_IGNORE_BRANCH_ISA and
OPTION_NO_IGNORE_BRANCH_ISA enum values.
(PARSE_AND_LIST_LONGOPTS): Add "ignore-branch-isa" and
"no-ignore-branch-isa" options.
(PARSE_AND_LIST_OPTIONS): Add `--ignore-branch-isa' and
`--no-ignore-branch-isa'.
(PARSE_AND_LIST_ARGS_CASES): Handle OPTION_IGNORE_BRANCH_ISA and
OPTION_NO_IGNORE_BRANCH_ISA.
* ld.texinfo (Options specific to MIPS targets): Add
`--ignore-branch-isa' and `--no-ignore-branch-isa' options.
(ld and the MIPS family): Likewise.
* testsuite/ld-mips-elf/bal-jalx-pic-ignore.d: New test.
* testsuite/ld-mips-elf/bal-jalx-pic-ignore-n32.d: New test.
* testsuite/ld-mips-elf/bal-jalx-pic-ignore-n64.d: New test.
* testsuite/ld-mips-elf/unaligned-branch-ignore-2.d: New test.
* testsuite/ld-mips-elf/unaligned-branch-ignore-r6-1: New test.
* testsuite/ld-mips-elf/unaligned-branch-ignore-mips16: New
test.
* testsuite/ld-mips-elf/unaligned-branch-ignore-micromips: New
test.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
PR ld/20995
* elf32-cris.c (elf_cris_size_dynamic_sections): Handle sdynrelro.
(elf_cris_adjust_dynamic_symbol): Place variables copied into the
executable from read-only sections into sdynrelro.
(elf_cris_finish_dynamic_symbol): Select sreldynrelro for
dynamic relocs in sdynrelro.
(elf_backend_want_dynrelro): Define.
bfd/
* config.bfd (powerpcle-*-rtems*): Do not mark as removed.
(arm-*-rtems*): Move to (arm*-*-eabi*).
(i[3-7]86-*-rtems*): Move to (i[3-7]86-*-elf*).
(m68-*-rtems*): Move to (m68*-*-elf*).
ld/
* configure.tgt (arm-*-rtems*): Move to (arm*-*-eabi*).
(bfin-*-rtems*): Move to (bfin*-*-elf*).
(i[3-7]86-*-rtems*): Move to (i[3-7]86*-*-elf*).
(m68*-*-rtems*): Move to (m68*-*-elf*).
(mips*-*-rtems*): Move to (mips*-*-elf*).
(or1k*-*-rtems*): Move to (or1k*-*-elf*).
(powerpc*-*-rtems*): Move to (powerpc*-*-elf*).
(sparc*-*-rtems*): Move to (sparc*-*-elf*).
(sparc64*-*-rtems*): Move to (sparc64*-*-elf*).
Complement commit 81ff47b3a5 ("PR ld/20828: Fix linker script symbols
wrongly forced local with section GC") and move the symbol sweep stage
of section GC from `elf_gc_sweep' to `bfd_elf_size_dynamic_sections',
avoiding the need to clear the `forced_local' marker, problematic for
targets that have special processing in their `elf_backend_hide_symbol'
handler. Set `mark' instead in `bfd_elf_record_link_assignment' and,
matching changes from commit 3bd43ebcb6 ("ld --gc-sections fail with
__tls_get_addr_opt"), also in PowerPC `__tls_get_addr_opt' handling
code, removing a:
FAIL: PR ld/20828 dynamic symbols with section GC (version script)
test suite failure with the `score-elf' target.
The rationale is it is enough if symbols are swept at the beginning of
`bfd_elf_size_dynamic_sections' as it is only in this function that the
size of the GOT, the dynamic symbol table and other dynamic sections is
determined, which will depend on the number of symbols making it to the
dynamic symbol table. It is also appropriate to do the sweep at this
point as it is already after any changes have been made to symbols with
`bfd_elf_record_link_assignment', and not possible any earlier as calls
to that function are only made just beforehand -- barring audit entry
processing -- via `gld${EMULATION_NAME}_find_statement_assignment'
invoked from `gld${EMULATION_NAME}_before_allocation' which is the ELF
handler for `ldemul_before_allocation'.
bfd/
PR ld/20828
* elflink.c (bfd_elf_record_link_assignment): Revert last
change and don't ever clear `forced_local'. Set `mark'
unconditionally.
(elf_gc_sweep_symbol_info, elf_gc_sweep_symbol): Reorder within
file.
(elf_gc_sweep): Move the call to `elf_gc_sweep_symbol'...
(bfd_elf_size_dynamic_sections): ... here.
* elf32-ppc.c (ppc_elf_tls_setup): Don't clear `forced_local'
and set `mark' instead in `__tls_get_addr_opt' processing.
* elf64-ppc.c (ppc64_elf_tls_setup): Likewise.
This patch fixes a number of issues with powerpc dynamic relocations.
1) Both ppc and ppc64 were emitting more dynamic symbols and
relocations than necessary, due to not supporting static linker
resolution of tls_index entries for __tls_get_addr_opt. This meant
that any @got@tlsgd or @got@tlsld reloc needed to make their symbols
dynamic and generate dptmod and dtprel relocs for the dynamic linker.
That would have been passable, but what happened was that practically
all @got relocations resulted in their symbols being made dynamic and
dynamic relocations emitted against the GOT entries. (Mostly visible
on ppc32 executables since ppc64 gcc really only uses @got style
relocs for TLS.)
2) The PowerOpen syntax was not supported with __tls_get_addr_opt.
DTPMOD/DTPREL relocs on tls_index TOC entries did not use the trick of
forcing dynamic symbols and relocations so those entries always
resulted in the full __tls_get_addr processing. gcc doesn't use the
PowerOpen syntax for TLS, and normally such code would be optimized to
TLS IE or LE so the impact of missing this support was minimal.
3) In an executable, relocations against GNU indirect functions always
used the value of their PLT stub. While this is correct, it is
better in some cases to use a dynamic relocation. An extra dynamic
relocation can mean that calls via function pointers need not bounce
through the PLT stub at runtime.
The patch also tidies the PLT handling code in ppc32
allocate_dynrelocs. Allocating PLT entries after other dynamic relocs
allows the PLT loop to omit special handling for undefined weak
symbols, and that in turn allows the loop to be simplified.
bfd/
* elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Merge two cases
where dynamic relocs are preferable. Allow ifunc too.
(ensure_undefweak_dynamic): New function.
(allocate_dynrelocs): Use it here. Move plt handling last and
don't make symbols dynamic, simplifying loop. Only make undef
weak symbols with GOT entries dynamic. Correct condition
for GOT relocs. Handle dynamic relocs on ifuncs. Correct
comments. Remove goto.
(ppc_elf_relocate_section): Correct test for using dynamic
symbol on GOT relocs. Rearrange test for emitting GOT relocs
to suit. Set up explicit tls_index entries and implicit GOT
tls_index entries resolvable at link time for
__tls_get_addr_opt. Simplify test to clear mem for prelink.
* elf64-ppc.c (allocate_got): Correct condition for GOT relocs.
(ensure_undefweak_dynamic): New function.
(allocate_dynrelocs): Use it here. Only make undef weak symbols
with GOT entries dynamic. Remove unnecessary test of
WILL_CALL_FINISH_DYNAMIC_SYMBOL in PLT handling.
(ppc64_elf_relocate_section): Correct test for using dynamic
symbol on GOT relocs. Rearrange test for emitting GOT relocs
to suit. Set up explicit tls_index entries and implicit GOT
tls_index entries resolvable at link time for __tls_get_addr_opt.
Simplify expression to clear mem for prelink.
ld/
* testsuite/ld-powerpc/tlsexe.r: Update for fewer dynamic relocs
and symbols.
* testsuite/ld-powerpc/tlsexe.d: Likewise.
* testsuite/ld-powerpc/tlsexe.g: Likewise.
bfd * elfnn-aarch64.c: Fix relaxations for ILP32 mode.
ld * testsuite/ld-aarch64/aarch64-elf.exp: Run new tests.
* testsuite/ld-aarch64/tls-desc-ie-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-all-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-gd-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-gdesc-le-2-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-gdesc-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-ie-le-2-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-ie-le-3-ilp32.d: New test.
* testsuite/ld-aarch64/tls-relax-ie-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-desc-ie-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-desc-le-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-gd-ie-ilp32.d: New test.
* testsuite/ld-aarch64/tls-tiny-gd-le-ilp32.d: New test.
bfd/
* elfnn-aarch64.c (elf_aarch64_hash_symbol): New function.
(elf_backend_hash_symbol): Define.
ld/
* testsuite/ld-aarch64/aarch64-elf.exp (aarch64elflinktests): New tests.
* testsuite/ld-aarch64/func-in-so.s: New test source file.
* testsuite/ld-aarch64/func-sym-hash-opt.s: Likewise.
* testsuite/ld-aarch64/func-sym-hash-opt.d: New expected test result.
Fix a generic ELF linker regression introduced with a chain of changes
made to unused input section garbage collection:
- commit 1a766c6843 ("Also hide symbols without PLT nor GOT
references."),
<https://sourceware.org/ml/binutils/2011-09/msg00076.html>,
- commit 1d5316ab67 ("PR ld/13177: garbage collector retains zombie
references to external libraries"),
<https://sourceware.org/ml/binutils/2011-10/msg00161.html>,
- commit 6673f753c0 ("Fix PR 12772, garbage collection of dynamic
syms"), <https://sourceware.org/ml/binutils/2011-12/msg00077.html>,
causing the garbage collection of unused symbols present in a DSO
involved in a link to make identically named symbols ordinarily defined
(i.e. not hidden or PROVIDEd) by a linker script local, even though the
latter symbols are supposed to be global as if no DSO defined them as
well.
This is because linker script assignments are processed very late as
`lang_process' proceeds, down in the call to `ldemul_before_allocation',
which is made after the call to `lang_gc_sections' to do input section
garbage collecting. Consequently if unused, then any such DSO-defined
symbol has already been garbage-collected and internally marked local.
It would ordinarily be removed from dynamic symbol table output, however
a linker script assignment correctly replaces its original definition
with the new one and enters it into the dynamic symbol table produced as
it is supposed to be exported. The original local marking is however
retained making the symbol local in the dynamic symbol table and
therefore not available externally. This also causes a sorting problem
with the MIPS target, which does not expect non-section local dynamic
symbols to be output and produces an invalid binary.
Fix the problem then, by removing the `forced_local' marking for the
offending case and add suitable test cases. First to verify that unused
symbols ordinarily defined with linker script assignments remain
exported in the context of input section garbage collection whether or
not a DSO defining identically named symbols is present in the link.
Second that a linker version script still correctly retains or removes
such symbols as requested.
bfd/
PR ld/20828
* elflink.c (bfd_elf_record_link_assignment): Clear any
`forced_local' marking for DSO symbols that are not being
provided.
ld/
PR ld/20828
* testsuite/ld-elf/pr20828-1.sd: New test.
* testsuite/ld-elf/pr20828-2a.sd: New test.
* testsuite/ld-elf/pr20828-2b.sd: New test.
* testsuite/ld-elf/pr20828.ld: New test linker script.
* testsuite/ld-elf/pr20828.ver: New test version script.
* testsuite/ld-elf/pr20828.s: New test source.
* testsuite/ld-elf/shared.exp: Run the new test.
Also generate unwind info for the .plt.bnd section. Sine it is the same
as unwind info for the .plt.got section, we use unwind info for the
.plt.got section to cover the the .plt.bnd section.
bfd/
PR ld/21038
* elf64-x86-64.c (elf_x86_64_link_hash_table): Add
plt_bnd_eh_frame.
(elf_x86_64_check_relocs): Create .eh_frame section for the
.plt.bnd section.
(elf_x86_64_size_dynamic_sections): Allocate and initialize
.eh_frame section for the .plt.bnd section.
(elf_x86_64_finish_dynamic_sections): Adjust .eh_frame section
for the .plt.bnd section.
ld/
PR ld/21038
* testsuite/ld-x86-64/pr21038b.d: Updated.
* testsuite/ld-x86-64/pr21038c.d: New file.
* testsuite/ld-x86-64/pr21038c.s: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run pr21038c.
PR binutils/20876
bfd * opncls.c (find_separate_debug_file): Add include_dirs
parameter. Only include the directory part of the bfd's filename
in search paths if include_dirs is true. Add a couple of extra
locations for looking for debug files.
( bfd_follow_gnu_debuglink): Update invocation of
find_separate_debug_file.
(bfd_follow_gnu_debugaltlink): Likewise.
(get_build_id): New function: Finds the build-id of the given bfd.
(get_build_id_name): New function: Computes the name of the
separate debug info file for a bfd, based upon its build-id.
(check_build_id_file): New function: Checks to see if a separate
debug info file exists at the given location, and that its
build-id matches that of the original bfd.
(bfd_follow_build_id_debuglink): New function: Finds a separate
debug info file for a given bfd by using the build-id method.
* dwarf2.c (_bfd_dwarf2_slurp_debug_info): Try using the build-id
method of locating a separate debug info file before using the
debuglink method.
* bfd-in2.h: Regenerate.
binutils * NEWS: Mention the new feature.
* testsuite/binutils-all/objdump.exp (test_build_id_debuglink):
New proc to test the location of separate debug info files using
the build-id method.
bfd * config.bfd: Add entries for i686-redox and x86_64-redox.
gas * configure.tgt: Add entry for i386-redox.
ld * configure.tgt: Add entries for x86-redox and x86_64-redox.
When there are both PLT and GOT references to the same function symbol,
linker combines GOTPLT and GOT slots into a single GOT slot and create
an entry in .plt.got section for PLT access via the GOT slot. This
patch adds unwind info for .plt.got section.
bfd/
PR ld/20830
* elf32-i386.c (elf_i386_eh_frame_plt_got): New.
(PLT_GOT_FDE_LENGTH): Likewise.
(elf_i386_plt_layout): Add eh_frame_plt_got and
eh_frame_plt_got_size.
(elf_i386_plt): Updated.
(elf_i386_link_hash_table): Add plt_got_eh_frame.
(elf_i386_check_relocs): Create .eh_frame section for .plt.got.
(elf_i386_size_dynamic_sections): Allocate and initialize
.eh_frame section for .plt.got.
(elf_i386_finish_dynamic_sections): Adjust .eh_frame section for
.plt.got.
(elf_i386_nacl_plt): Add FIXME for eh_frame_plt_got and
eh_frame_plt_got_size.
* elf64-x86-64.c (elf_x86_64_eh_frame_plt_got): New.
(PLT_GOT_FDE_LENGTH): Likewise.
(elf_x86_64_backend_data): Add eh_frame_plt_got and
eh_frame_plt_got_size.
(elf_x86_64_arch_bed): Updated.
(elf_x86_64_bnd_arch_bed): Add FIXME for eh_frame_plt_got and
eh_frame_plt_got_size.
(elf_x86_64_nacl_arch_bed): Likewise.
(elf_x86_64_link_hash_table): Add plt_got_eh_frame.
(elf_x86_64_check_relocs): Create .eh_frame section for .plt.got.
(elf_x86_64_size_dynamic_sections): Allocate and initialize
.eh_frame section for .plt.got.
(elf_x86_64_finish_dynamic_sections): Adjust .eh_frame section
for .plt.got.
ld/
PR ld/20830
* testsuite/ld-i386/i386.exp: Run pr20830.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-i386/pr20830.d: New file.
* testsuite/ld-i386/pr20830.s: Likewise.
* testsuite/ld-x86-64/pr20830.d: Likewise.
* testsuite/ld-x86-64/pr20830.s: Likewise.
Use eh_frame_plt_size and eh_frame_plt from elf_i386_plt_layout for
.eh_frame covering the .plt section.
* elf32-i386.c (elf_i386_size_dynamic_sections): Set
plt_eh_frame->size to eh_frame_plt_size and use eh_frame_plt.
bfd * dwarf2.c (lookup_address_in_function_table): Return early if
there are no functions in the given comp unit, or if the high
address of the last function in the comp unit is less than the
desired address.
binutils * objdump.c (display_file): Add new parameter 'last_file'. If
last_file is true, do not call bfd_close at the end of the
function.
(main): Set the value of the last_file parameter when calling
display_file.
Without this, ld has been seen to crash in libc when freeing tsec_free:
*** Error in `/usr/bin/ld': double free or corruption (!prev): 0x0000000120ceb6a0 ***
_bfd_elf_link_read_relocs will always return the cached value if
present, even if keep_memory is false, therefore setting tsec_free to
NULL only when keep_memory is true is not sufficient.
* elf64-alpha.c (elf64_alpha_relax_opt_call): Don't set tsec_free
if relocs are cached.
Fixes: tmpdir/pr14525: symbol lookup error: tmpdir/pr14525: undefined
symbol: __executable_start
FAIL: PIE PR ld/14525
* elf32-hppa.c (ensure_undef_weak_dynamic): New function.
(allocate_plt_static, allocate_dynrelocs): Use it.
This flag should be set for any section header using sh_info to
point to another section.
Fixes a readelf warning about an unexpected value in info field,
resulting in FAIL: Build warn libbar.so
* elf-hppa.h (elf_hppa_fake_sections): Set SHF_INFO_LINK for
.PARISC.unwind section.
