Recent gcc commit b4371b277f1e ("[ARC] Enable init_array support")
inhibits DT_"INIT,FINI} in favor of DT_{INIT,FINI}ARRAY.
Even prior to that, it seems ARC port is the only one with this
special DT_INIT/FINI handling in linker emulation. Removing it
doesn't seem to change any uClibc/glibc testsuite results,
so this can RIP anyways.
bfd/
2019-02-01 Vineet Gupta <vgupta@synopsys.com>
* elf32-arc.c: Delete init_str, fini_str
ld/
2019-02-01 Vineet Gupta <vgupta@synopsys.com>
* emultempl/arclinux.em : Delete special INIT/FINI handling.
This was always supposed to be an error. Code emitted by gcc for
inline PLT calls assumes PLT is an array of addresses.
* elf32-ppc.c (ppc_elf_relocate_section): Add %X to "unsupported
for bss-plt" warning to make it an error.
This fixes the last ld failures on SPARC64/Linux:
FAIL: Run pr18841 with libpr18841b.so
FAIL: Run pr18841 with libpr18841c.so
FAIL: Run pr18841 with libpr18841bn.so (-z now)
FAIL: Run pr18841 with libpr18841cn.so (-z now)
by mimicing what has been done on x86-64 and Aarch64 to fix the PR.
bfd/
PR ld/18841
* elf32-sparc.c (elf32_sparc_reloc_type_class): Return
reloc_class_ifunc for ifunc symbols.
* elf64-sparc.c (elf64_sparc_reloc_type_class): Likewise.
bfd * config.bfd: Move the powerpc-lynxos and powerpc-windiss targets
into the definitely obsolete list.
binutils * README-how-to-make-a-release: Add a note about updating the
obsolete targets in the bfd/config.bfd file.
commit bd7ab16b45
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Feb 13 07:34:22 2018 -0800
x86-64: Generate branch with PLT32 relocation
removed check R_X86_64_PC32 relocation against protected symbols in
shared objects. Since elf_x86_64_check_relocs is called after we
have seen all input files, we can check for PC-relative relocations in
elf_x86_64_check_relocs. We should not allow PC-relative relocations
against protected symbols since address of protected function and
location of protected data may not be in the shared object.
bfd/
PR ld/24151
* elf64-x86-64.c (elf_x86_64_need_pic): Check
SYMBOL_DEFINED_NON_SHARED_P instead of def_regular.
(elf_x86_64_relocate_section): Move PIC check for PC-relative
relocations to ...
(elf_x86_64_check_relocs): Here.
(elf_x86_64_finish_dynamic_symbol): Use SYMBOL_DEFINED_NON_SHARED_P
to check if a symbol is defined in a non-shared object.
* elfxx-x86.h (SYMBOL_DEFINED_NON_SHARED_P): New.
ld/
PR ld/24151
* testsuite/ld-x86-64/pr24151a-x32.d: New file.
* testsuite/ld-x86-64/pr24151a.d: Likewise.
* testsuite/ld-x86-64/pr24151a.s: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run pr24151a and pr24151a-x32.
Fedora Rawhide has just switched to GCC9, and now GDB doesn't compile
because of a BFD warning:
BUILDSTDERR: ../../bfd/elf32-arm.c: In function 'elf32_arm_final_link_relocate':
BUILDSTDERR: ../../bfd/elf32-arm.c:10907:10: error: absolute value function 'labs' given an argument of type 'bfd_signed_vma' {aka 'long long int'} but has parameter of type 'long int' which may cause truncation of value [-Werror=absolute-value]
BUILDSTDERR: 10907 | value = labs (relocation);
BUILDSTDERR: | ^~~~
You can take a look at the full build log here:
https://kojipkgs.fedoraproject.org//work/tasks/4828/32174828/build.log
The fix is (apparently) simple: instead of using 'labs', we should use
'llabs', since we're passing a 'bfd_signed_vma' to it, which is at
least a 'long long int', as far as I have checked. This is what this
patch does.
bfd/ChangeLog:
2019-01-25 Sergio Durigan Junior <sergiodj@redhat.com>
* elf32-arm.c (elf32_arm_final_link_relocate): Use 'llabs' instead
of 'labs' (and fix GCC warning).
2019-01-16 Kito Cheng <kito@andestech.com>
bfd/
* elf-attrs.c (vendor_obj_attr_size): Return 0 if size is 0 even
for OBJ_ATTR_PROC.
gas/
* testsuite/gas/riscv/attribute-empty.d: New.
Mode field should be read in octal, all the rest in decimal. Do so.
PR 24061
PR 21786
* coff-rs6000.c (GET_VALUE_IN_FIELD): Add base parameter and
adjust all callers.
(EQ_VALUE_IN_FIELD): Likewise.
* coff64-rs6000.c (GET_VALUE_IN_FIELD): Likewise.
When optimising inline plt calls to __tls_get_addr without tls marker
relocs, ld should zap any toc restore insn after the bctrl, to stop a
load-hit-store stall.
* elf64-ppc.c (ppc64_elf_relocate_section <tls_ldgd_opt>): When
editing an old-style __tls_get_addr call, replace a toc restore
insn with a nop.
Commit 2bf2bf23da exposed a bug on targets that create common sections
other than the standard ELF SHN_COMMON. If these are output by ld -r,
then their type becomes SHT_PROGBITS unless the target handles them
specially (eg. by elf_backend_special_sections), and if they are
merged into .bss/.sbss by ld -r then that section becomes SHT_PROGBITS.
Worse, if they are output by ld -r, then their size is increased by
bfd_generic_define_common_symbol during final link, which leads to
bogus file contents being copied to output.
For mips, it seems to me that the .scommon section should not be
output for ld -r, but I haven't made that change in this patch.
PR 24015
* elf.c (bfd_elf_get_default_section_type): Make common sections
SHT_NOBITS.
* linker.c (bfd_generic_define_common_symbol): Clear
SEC_HAS_CONTENTS.
PR 23966
* libbfd.c (SSIZE_MAX): Define.
(bfd_malloc, bfd_realloc): Don't cast size to long to check for
"negative" values, compare against SSIZE_MAX instead.
* elf32-i386.c (elf_i386_relocate_section): Call
elf_i386_rtype_to_howto to get reloc_howto_type pointer.
* elf64-x86-64.c (elf_x86_64_relocate_section): Call
elf_x86_64_rtype_to_howto to get reloc_howto_type pointer.
All of the backend relocate_section functions that interpret reloc
numbers assuming the input file is of the expected type (ie. same as
output or very similar) really ought to be checking input file type.
Not many do, and those that do currently just assert. This patch
replaces the assertion with a more graceful exit.
PR 23980
* elf32-i386.c (elf_i386_relocate_section): Exit with wrong format
error rather than asserting input file is as expected.
* elf32-s390.c (elf_s390_relocate_section): Likewise.
* elf32-sh.c (sh_elf_relocate_section): Likewise.
* elf32-xtensa.c (elf_xtensa_relocate_section): Likewise.
* elf64-ppc.c (ppc64_elf_relocate_section): Likewise.
* elf64-s390.c (elf_s390_relocate_section): Likewise.
* elf64-x86-64.c (elf_x86_64_relocate_section): Likewise.
* elf32-ppc.c (ppc_elf_relocate_section): Exit with wrong format
error if input file is not ppc32 ELF.
PR 23994
* aoutx.h: Include limits.h.
(get_reloc_upper_bound): Detect long overflow and return a file
too big error if it occurs.
* elf.c: Include limits.h.
(_bfd_elf_get_symtab_upper_bound): Detect long overflow and return
a file too big error if it occurs.
(_bfd_elf_get_dynamic_symtab_upper_bound): Likewise.
(_bfd_elf_get_dynamic_reloc_upper_bound): Likewise.
Linkers group input note sections with the same name into one output
note section with the same name. One output note section is placed in
one PT_NOTE segment. New linkers merge all input .note.gnu.property
sections into one output .note.gnu.property section with a single
NT_GNU_PROPERTY_TYPE_0 note in a single PT_NOTE segment. Since older
linkers treat input .note.gnu.property section as a generic note section
and just concatenate all input .note.gnu.property sections into one
output .note.gnu.property section without merging them, we may
see one or more NT_GNU_PROPERTY_TYPE_0 notes in PT_NOTE segment, which
are invalid.
GNU_PROPERTY_X86_UINT32_VALID was defined to address this issue such
that linker sets the bit for non-relocatable outputs. But it isn't
sufficient:
1. It doesn't cover generic properties.
2. When -mx86-used-note=yes is passed to x86 assembler, the
GNU_PROPERTY_X86_UINT32_VALID bit is set in GNU_PROPERTY_X86_ISA_1_USED
property in object file and older linkers generate invalid
NT_GNU_PROPERTY_TYPE_0 notes with the GNU_PROPERTY_X86_UINT32_VALID bit
set.
I am proposing the following changes:
1. Add PT_GNU_PROPERTY segment type:
# define PT_GNU_PROPERTY (PT_LOOS + 0x474e553)
which covers .note.gnu.property section.
2. Remove GNU_PROPERTY_X86_UINT32_VALID.
bfd/
PR ld/23900
* elf.c (get_program_header_size): Add a PT_GNU_PROPERTY
segment for NOTE_GNU_PROPERTY_SECTION_NAME.
(_bfd_elf_map_sections_to_segments): Create a PT_GNU_PROPERTY
segment for NOTE_GNU_PROPERTY_SECTION_NAME.
* elfxx-x86.c (_bfd_elf_link_setup_gnu_properties): Don't set
GNU_PROPERTY_X86_UINT32_VALID.
binutils/
PR ld/23900
* readelf.c (get_segment_type): Support PT_GNU_PROPERTY.
(decode_x86_isa): Don't check GNU_PROPERTY_X86_UINT32_VALID.
(decode_x86_feature_1): Likewise.
(decode_x86_feature_2): Likewise.
(print_gnu_property_note): Remove GNU_PROPERTY_X86_UINT32_VALID
check.
* testsuite/binutils-all/i386/empty.d: Updated.
* testsuite/binutils-all/x86-64/empty-x32.d: Likewise.
* testsuite/binutils-all/x86-64/empty.d: Likewise.
* testsuite/binutils-all/i386/pr21231b.s: Change
GNU_PROPERTY_X86_ISA_1_USED bits to 0x7fffffff.
* testsuite/binutils-all/x86-64/pr21231b.s: Likewise.
gas/
PR ld/23900
* config/tc-i386.c (x86_cleanup): Don't set
GNU_PROPERTY_X86_UINT32_VALID.
* testsuite/gas/i386/property-1.s: Change
GNU_PROPERTY_X86_ISA_1_USED bits to 0.
include/
PR ld/23900
* elf/common.h (PT_GNU_PROPERTY): New.
(GNU_PROPERTY_X86_UINT32_VALID): Removed.
ld/
PR ld/23900
* testsuite/ld-elf/elf.exp: Run PR ld/23900 test.
* testsuite/ld-elf/pr23900-1-32.rd: New file.
* testsuite/ld-elf/pr23900-1-64.rd: Likewise.
* testsuite/ld-elf/pr23900-1.d: Likewise.
* testsuite/ld-elf/pr23900-1.s: Likewise.
* testsuite/ld-elf/pr23900-2.s: Likewise.
* testsuite/ld-elf/pr23900-2a.d: Likewise.
* testsuite/ld-elf/pr23900-2b.d: Likewise.
* testsuite/ld-i386/ibt-plt-1.d: Adjusted.
* testsuite/ld-i386/ibt-plt-2c.d: Likewise.
* testsuite/ld-i386/ibt-plt-2d.d: Likewise.
* testsuite/ld-i386/ibt-plt-3d.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-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-2c.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-i386/pr23372c.d: Expect <None>
for GNU_PROPERTY_X86_ISA_1_USED.
* testsuite/ld-x86-64/pr23372c-x32.d: Likewise.
* testsuite/ld-x86-64/pr23372c.d: Likewise.
* testsuite/ld-x86-64/pr23372d-x32.d: Likewise.
* testsuite/ld-x86-64/pr23372d.d: Likewise.
* testsuite/ld-x86-64/property-x86-5a.s: Change
GNU_PROPERTY_X86_ISA_1_USED bits to 0.
* testsuite/ld-x86-64/property-x86-5b.s: Likewise.
32-bit constants loaded by two const16 opcodes that involve relocation
(e.g. calculated as a sum of a symbol and a constant) may overflow,
resulting in linking error with the following message:
dangerous relocation: const16: cannot encode: (_start+0x70000000)
They should wrap around instead. Limit const16 opcode immediate field to
16 least significant bits to implement this wrap around.
bfd/
2018-12-11 Max Filippov <jcmvbkbc@gmail.com>
* elf32-xtensa.c (elf_xtensa_do_reloc): Limit const16 opcode
immediate field to 16 least significant bits.
Add elf32_xc16x_rtype_to_howto to get reloc_howto_type pointer from
ELF32_R_TYPE.
* elf32-xc16x.c (elf32_xc16x_rtype_to_howto): New function.
(elf32_xc16x_relocate_section): Call elf32_xc16x_rtype_to_howto
instead of xc16x_reloc_type_lookup to get reloc_howto_type.
Mark the previous definition from IR object as undefined so that the
generic linker will override it.
bfd/
PR ld/23958
* elflink.c (_bfd_elf_add_default_symbol): Override the previous
definition from IR object.
ld/
PR ld/23958
* testsuite/ld-plugin/lto.exp: Run PR ld/23958 test.
* testsuite/ld-plugin/pr23958.c: New file.
* testsuite/ld-plugin/pr23958.t: Likewise.
Up until now OpenRISC GDB only has supported bare metal debugging. This
patch adds linux userspace debugging and core dump analysis support.
The changes are loosely based on nios2 and riscv implementations.
This was tested with linux 4.20 core dumps for executables linked
against musl libc.
bfd/ChangeLog:
* elf32-or1k.c (or1k_grok_prstatus): New function.
(or1k_grok_psinfo): Likewise.
gdb/ChangeLog:
* Makefile.in (ALL_TARGET_OBS): Add or1k-linux-tdep.o.
* configure.tgt: Add or1k*-*-linux*.
* or1k-linux-tdep.c: New file.
* or1k-tdep.c (or1k_gdbarch_init): Call gdbarch_init_osabi.
bfd/
PR 23952
* syms.c (_bfd_generic_read_minisymbols): Free syms before
returning with zero symcount.
binutils/
* nm.c (display_rel_file): Use xrealloc to increase minisyms
for synthetic symbols.
This patch started off just adding the warnings in tc-ppc.c about
incorrect usage of @l, @h and @ha in instructions that don't have
16-bit D-form fields. That unfortunately showed up three warnings in
ld/testsuite/ld-powerpc/vle-multiseg.s on instructions like
e_li r3, IV_table@l+0x00
which was being assembled to
8: 70 60 00 00 e_li r3,0
a: R_PPC_ADDR16_LO IV_table
The ADDR16_LO reloc is of course completely bogus on e_li, which has
a split 20-bit signed integer field in bits 0x1f7fff, the low 11 bit
in 0x7ff, the next 5 bits in 0x1f0000, and the high 4 bits in 0x7800.
Applying an ADDR16_LO reloc to the instruction potentially changes
the e_li instruction to e_add2i., e_add2is, e_cmp16i, e_mull2i,
e_cmpl16i, e_cmph16i, e_cmphl16i, e_or2i, e_and2i., e_or2is, e_lis,
e_and2is, or some invalid encodings.
Now there is a relocation that suits e_li, R_PPC_VLE_ADDR20, which was
added 2017-09-05 but I can't see code in gas to generate the
relocation. In any case, VLE_ADDR20 probably doesn't have the correct
semantics for @l since ideally you'd want an @l to pair with @h or @ha
to generate a 32-bit constant. Thus @l should only produce a 16-bit
value, I think. So we need some more relocations to handle e_li it
seems, or as I do in this patch, modify the behaviour of existing
relocations when applied to e_li instructions.
include/
* opcode/ppc.h (E_OPCODE_MASK, E_LI_MASK, E_LI_INSN): Define.
bfd/
* elf32-ppc.c (ppc_elf_howto_raw <R_PPC_VLE_ADDR20>): Correct
mask and shift value.
(ppc_elf_vle_split16): Use E_OPCODE_MASK. Handle e_li
specially.
gas/
* config/tc-ppc.c (md_assemble): Adjust relocs for VLE before
TLS tweaks. Handle e_li. Warn on unexpected operand field
for lo16/hi16/ha16 relocs.
Armv8.3-A has another key used in pointer authentication called the
B-key (other than the A-key that is already supported). In order for
stack unwinders to work it is necessary to be able to identify frames
that have been signed with the B-key rather than the A-key and it was
felt that keeping this as an augmentation character in the CIE was the
best bet. The DWARF extensions for ARM therefore propose to add a new
augmentation character 'B' to the CIE augmentation string and the
corresponding cfi directive ".cfi_b_key_frame". I've made the relevant
changes to GAS and LD to add support for B-key unwinding, which required
modifying LD to check for 'B' in the augmentation string, adding the
".cfi_b_key_frame" directive to GAS and adding a "pauth_key" field to
GAS's fde_entry and cie_entry structs.
The pointer authentication instructions will behave as NOPs on
architectures that don't support them, and so a check for the
architecture being assembled for is not necessary since there will be no
behavioural difference between augmentation strings with and without the
'B' character on such architectures.
2018-12-05 Sam Tebbs <sam.tebbs@arm.com>
bfd/
* elf-eh-frame.c (_bfd_elf_parse_eh_frame): Add check for 'B'.
gas/
* dw2gencfi.c (struct cie_entry): Add tc_cie_entry_extras invocation.
(alloc_fde_entry): Add tc_fde_entry_init_extra invocation.
(output_cie): Add tc_output_cie_extra invocation.
(select_cie_for_fde): Add tc_cie_fde_equivalent_extra and
tc_cie_entry_init_extra invocation.
(frch_cfi_data, cfa_save_data): Move to dwgencfi.h.
* config/tc-aarch64.c (s_aarch64_cfi_b_key_frame): Declare.
(md_pseudo_table): Add "cfi_b_key_frame".
* config/tc-aarch64.h (tc_fde_entry_extras, tc_cie_entry_extras,
tc_fde_entry_init_extra, tc_output_cie_extra,
tc_cie_fde_equivalent_extra, tc_cie_entry_init_extra): Define.
* dw2gencfi.h (struct fde_entry): Add tc_fde_entry_extras invocation.
(pointer_auth_key): Define.
(frch_cfi_data, cfa_save_data): Move from dwgencfi.c.
* doc/c-aarch64.texi (.cfi_b_key_frame): Add documentation.
* testsuite/gas/aarch64/(pac_ab_key.d, pac_ab_key.s): New file.
For GNU_PROPERTY_X86_COMPAT_ISA_1_USED and GNU_PROPERTY_X86_UINT32_OR_AND
properties, a bit in the output pr_data field is set if it is set in any
relocatable input pr_data fields and this property is present in all
relocatable input files. A missing property implies that its bits have
unknown values. When all bits in the the output pr_data field are zero,
this property should not be removed from output to indicate it has zero
in all bits.
bfd/
PR ld/23372
* elfxx-x86.c (_bfd_x86_elf_merge_gnu_properties): Don't remove
empty properties for GNU_PROPERTY_X86_COMPAT_ISA_1_USED and
GNU_PROPERTY_X86_UINT32_OR_AND.
(_bfd_x86_elf_link_fixup_gnu_properties): Likewise.
ld/
PR ld/23372
* testsuite/ld-i386/pr23372a.d: Updated.
* testsuite/ld-i386/pr23372c.d: Likewise.
* testsuite/ld-x86-64/pr23372a-x32.d: Likewise.
* testsuite/ld-x86-64/pr23372a.d: Likewise.
* testsuite/ld-x86-64/pr23372c-x32.d: Likewise.
* testsuite/ld-x86-64/pr23372c.d: Likewise.
Delay setting its alignment until we know it is non-empty. Otherwise an
empty iplt section may change vma and lma of the following sections, which
triggers moving dot of the following section backwards, resulting in a
warning and section lma not being set properly. It later leads to a
"File truncated" error.
bfd/
PR ld/23930
* elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Update
the iplt section alignment if it is non-empty.
(_bfd_x86_elf_link_setup_gnu_properties): Set plt.iplt_alignment
and delay setting the iplt section alignment.
* elfxx-x86.h (elf_x86_plt_layout): Add iplt_alignment.
ld/
PR ld/23930
* testsuite/ld-i386/i386.exp: Run pr23930.
* testsuite/ld-i386/pr23930.d: New file.
* testsuite/ld-x86-64/pr23930-32.t: Likewise.
* testsuite/ld-x86-64/pr23930-x32.d: Likewise.
* testsuite/ld-x86-64/pr23930.d: Likewise.
* testsuite/ld-x86-64/pr23930.t: Likewise.
* testsuite/ld-x86-64/pr23930a.s: Likewise.
* testsuite/ld-x86-64/pr23930b.s: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run pr23930 and pr23930-x32.