CTF functions return zero on success or an extended errno value which
can be translated into a string via the functions in this commit.
The errno numbers start at -CTF_BASE.
libctf/
* ctf-error.c: New file.
include/
* ctf-api.h (ctf_errno): New declaration.
(ctf_errmsg): Likewise.
These utilities are a bit of a ragbag of small things needed by more
than one TU: list manipulation, ELF32->64 translators, routines to look
up strings in string tables, dynamically-allocated string appenders, and
routines to set the specialized errno values previously committed in
<ctf-api.h>.
We do still need to dig around in raw ELF symbol tables in places,
because libctf allows the caller to pass in the contents of string and
symbol sections without telling it where they come from, so we cannot
use BFD to get the symbols (BFD reasonably demands the entire file). So
extract minimal ELF definitions from glibc into a private header named
libctf/elf.h: later, we use those to get symbols. (The start-of-
copyright range on elf.h reflects this glibc heritage.)
libctf/
* ctf-util.c: New file.
* elf.h: Likewise.
* ctf-impl.h: Include it, and add declarations.
The memory-allocation wrappers are simple things to allow malloc
interposition: they are only used inconsistently at present, usually
where malloc debugging was required in the past.
These provide a default implementation that is environment-variable
triggered (initialized on the first call to the libctf creation and
file-opening functions, the first functions people will use), and
a ctf_setdebug()/ctf_getdebug() pair that allows the caller to
explicitly turn debugging off and on. If ctf_setdebug() is called,
the automatic setting from an environment variable is skipped.
libctf/
* ctf-impl.h: New file.
* ctf-subr.c: New file.
include/
* ctf-api.h (ctf_setdebug): New.
(ctf_getdebug): Likewise.
This non-installed header is the means by which libctf consumers
communicate with libctf.
This header will be extended in subsequent commits.
include/
* ctf-api.h: New file.
The data structures and macros in this header can be used, if desired,
to access or create CTF files directly, without going through libctf,
though this should rarely be necessary in practice.
libctf relies on this header as its description of the CTF file format.
include/
* ctf.h: New file.
PR 24596
* emultempl/pe.em (gld_${EMULATION_NAME}_after_open): Check that
the output is coff before accessing coff tdata.
* emultempl/pep.em (gld_${EMULATION_NAME}_after_open): Likewise.
Force sysv hash style for reliable symbol table layout.
ld/ChangeLog:
* testsuite/ld-aarch64/variant_pcs-now.d: Use --hash-style=sysv.
* testsuite/ld-aarch64/variant_pcs-shared.d: Likewise.
Calls to error () can cause SIGTTOU to send gdb to the background.
For example, on an Arm build:
(gdb) b main
Breakpoint 1 at 0x10774: file /build/gdb/testsuite/../../../src/binutils-gdb/gdb/testsuite/gdb.base/watchpoint.c, line 174.
(gdb) r
Starting program: /build/gdb/testsuite/outputs/gdb.base/watchpoint/watchpoint
[1]+ Stopped ../gdb ./outputs/gdb.base/watchpoint/watchpoint
localhost$ fg
../gdb ./outputs/gdb.base/watchpoint/watchpoint
Cannot parse expression `.L1199 4@r4'.
warning: Probes-based dynamic linker interface failed.
Reverting to original interface.
The SIGTTOU is raised whilst inside a syscall during the call to tcdrain.
Fix is to use scoped_ignore_sigttou to ensure SIGTTOU is blocked.
In addition fix include comments - job_control is not included via terminal.h
gdb/ChangeLog:
* event-top.c: Remove include comment.
* inflow.c (class scoped_ignore_sigttou): Move from here...
* inflow.h (class scoped_ignore_sigttou): ...to here.
* ser-unix.c (hardwire_drain_output): Block SIGTTOU during drain.
* top.c: Remove include comment.
A plugin can change the element, so call the generic
bfd_link_add_symbols.
PR 24596
* cofflink.c (coff_link_check_archive_element): Don't assume
element is a coff object file after calling add_archive_element.
This patch cures a linker segfault, and "FAIL: Build pr22263-1".
PR 24596
* elf64-alpha.c (elf64_alpha_relocate_section): Don't attempt
to emit R_ALPHA_GOTTPREL in PIEs, for which no space is
allocated in alpha_dynamic_entries_for_reloc.
This doesn't fix the underlying bug, but an abort is better than a
segfault.
PR 24596
* elf32-m68k.c (elf_m68k_get_got_entry): Don't create a new
entry when MUST_FIND. Abort when MUST_FIND not found.
(elf_m68k_get_bfd2got_entry): Likewise.
(elf_m68k_relocate_section): Remove now useless assert.
One of the ld tests produces:
failed with: <Segmentation fault>, no expected output
FAIL: Discarded dynamic relocation section
This patch cures the segv. (The test still fails with ld producing
a really messed up output, DT_RELA at address 0!)
PR 24596
* elf64-hppa.c (elf64_hppa_finalize_dynreloc): Get the output bfd
from bfd_link_info, not an output section owner.
(elf64_hppa_finish_dynamic_symbol, elf64_hppa_finalize_opd): Likewise.
(elf_hppa_final_link_relocate): Likewise.
See also the FIXME. tic30-aout linker support is so bad (and has been
that way since the initial tic30-aout commit) that I'm obsoleting the
target. This patch fixes numerous linker testsuite segmentation faults.
PR 24596
* aout-tic30.c (MY_bfd_final_link): Don't segfault on missing
create_object_symbols_section, obj_textsec, obj_datasec or
obj_bsssec. Fix other errors in placement.
* config.bfd: Obsolete tic30-aout.
The XCOFF linker temporarily trims the output bfd section list,
without adjusting section_count to suit. This is a little rude, but
the dwarf line number code can easily cope with this situation. So
check for a NULL end of list as well as limiting the saved section
VMAs to the first section_count list entries.
Also fixes
-FAIL: Weak test 3 (main, static) (32-bit)
-FAIL: Weak test 3 (main, static) (64-bit)
PR 24596
* dwarf2.c (save_section_vma, section_vma_same): Check for NULL
end of section list as well as section_count.
* xcofflink.c (xcoff_link_add_symbols): Fix temporarily changed
section list before returning error.
Targets that lack ppc64 support were failing the new prefix-reloc
test. This patch adds some test infrastructure to deal with that, and
changes the powerpc gas usage info so that "-a64" is omitted when
unsupported.
I've been meaning to break up the usage message for a long time;
While doing so causes translators some work now, it should make it
easier next time a new powerpc option is added.
* config/tc-ppc.c (is_ppc64_target): New function.
(md_show_usage): Split up usage message. Don't show -a64 when
unsupported.
testsuite/gas/ppc/ppc.exp (supports_ppc64): New.
(prefix-reloc): Only run for ppc64.
I noticed that one of the readelf errors stopped processing of further
group sections. This patch makes readelf continue on to other groups,
like it does with the other errors.
* readelf.c (process_section_groups): Continue processing groups
when sh_entsize exceeds group size.
After fixing the ld-elf/pr22836-1a segmentation fault we run into an
assertion failure due to the generic ELF target not removing empty
SHT_GROUP sections. Avoid that.
* elf.c (bfd_elf_set_group_contents): Exit on zero size section.
Even though the generic ELF target doesn't handle groups correctly,
this helps avoid a segfault in bfd_elf_set_group_contents seen on
d30v-elf, dlx-elf, pj-elf, and xgate-elf when linking the pr22836
testcase.
PR 24596
bfd/
* linker.c (_bfd_generic_link_output_symbols): Heed BSF_KEEP.
ld/
* emultempl/genelf.em (gld${EMULATION_NAME}_after_open): Set
BFS_KEEP on group signature symbol.
Propagate STO_AARCH64_VARIANT_PCS st_other attribute to the output and
add DT_AARCH64_VARIANT_PCS dynamic tag if necessary.
Mismatching attributes are not diagnosed.
bfd/ChangeLog:
* elfnn-aarch64.c (elfNN_aarch64_merge_symbol_attribute): New function.
(struct elf_aarch64_link_hash_table): Add variant_pcs member.
(elfNN_aarch64_allocate_dynrelocs): Update variant_pcs.
(elfNN_aarch64_size_dynamic_sections): Add DT_AARCH64_VARIANT_PCS.
(elf_backend_merge_symbol_attribute): Define.
ld/ChangeLog:
* testsuite/ld-aarch64/aarch64-elf.exp: Add new tests.
* testsuite/ld-aarch64/variant_pcs-1.s: New asm for tests.
* testsuite/ld-aarch64/variant_pcs-2.s: New asm for tests.
* testsuite/ld-aarch64/variant_pcs-now.d: New test.
* testsuite/ld-aarch64/variant_pcs-r.d: New test.
* testsuite/ld-aarch64/variant_pcs-shared.d: New test.
* testsuite/ld-aarch64/variant_pcs.ld: New linker script for tests.
Allow st_other values such as STO_AARCH64_VARIANT_PCS to be set for alias
symbols independently. This is needed for ifunc symbols which are
aliased to the resolver using .set and don't expect resolver attributes
to override the ifunc symbol attributes. This means .variant_pcs must be
added explicitly to aliases.
gas/ChangeLog:
* config/tc-aarch64.c (aarch64_elf_copy_symbol_attributes): Define.
* config/tc-aarch64.h (aarch64_elf_copy_symbol_attributes): Declare.
(OBJ_COPY_SYMBOL_ATTRIBUTES): Define.
* testsuite/gas/aarch64/symbol-variant_pcs-3.d: New test.
* testsuite/gas/aarch64/symbol-variant_pcs-3.s: New test.
In ELF objects the specified symbol is marked with STO_AARCH64_VARIANT_PCS.
gas/ChangeLog:
* config/tc-aarch64.c (s_variant_pcs): New function.
* doc/c-aarch64.texi: Document .variant_pcs.
* testsuite/gas/aarch64/symbol-variant_pcs-1.d: New test.
* testsuite/gas/aarch64/symbol-variant_pcs-1.s: New test.
* testsuite/gas/aarch64/symbol-variant_pcs-2.d: New test.
* testsuite/gas/aarch64/symbol-variant_pcs-2.s: New test.
The bottom 2 bits of st_other are used for visibility, the top 6 bits are
de facto reserved for processor specific use. This patch defines a
bits to mark function symbols that follow a variant procedure call standard
with different register usage convention.
A dynamic tag is also defined that marks modules with R_<CLS>_JUMP_SLOT
relocations referencing symbols marked with STO_AARCH64_VARIANT_PCS.
This can be used by dynamic linkers that support lazy binding to decide
what registers need to be preserved during symbol resolution.
binutils/ChangeLog:
* readelf.c (get_aarch64_dynamic_type): Handle DT_AARCH64_VARIANT_PCS.
(get_aarch64_symbol_other): New, handles STO_AARCH64_VARIANT_PCS.
(get_symbol_other): Call get_aarch64_symbol_other.
include/ChangeLog:
* elf/aarch64.h (DT_AARCH64_VARIANT_PCS): Define.
(STO_AARCH64_VARIANT_PCS): Define.
Add a test-case gdb.dwarf2/gdb-add-index.exp to test
gdb/contrib/gdb-add-index.sh.
Tested with x86_64-linux.
gdb/testsuite/ChangeLog:
2019-05-24 Tom de Vries <tdevries@suse.de>
* gdb.dwarf2/gdb-add-index.exp: New file.
bfd/
* elf64-ppc.c (ppc64_elf_check_relocs): Set has_gotrel for
R_PPC64_GOT_PCREL34.
(xlate_pcrel_opt): New function.
(ppc64_elf_edit_toc): Handle R_PPC64_GOT_PCREL34.
(ppc64_elf_relocate_section): Edit GOT indirect to GOT relative
for R_PPC64_GOT_PCREL34. Implement R_PPC64_PCREL_OPT optimisation.
ld/
* testsuite/ld-powerpc/pcrelopt.s,
* testsuite/ld-powerpc/pcrelopt.d,
* testsuite/ld-powerpc/pcrelopt.sec: New test.
* testsuite/ld-powerpc/powerpc.exp: Run it.
This patch adds initial 64-bit insn assembler/disassembler support.
The only instruction added is "pnop" along with the automatic aligning
of prefix instruction so they do not cross 64-byte boundaries.
include/
* dis-asm.h (WIDE_OUTPUT): Define.
* opcode/ppc.h (prefix_opcodes, prefix_num_opcodes): Declare.
(PPC_OPCODE_POWERXX, PPC_GET_PREFIX, PPC_GET_SUFFIX),
(PPC_PREFIX_P, PPC_PREFIX_SEG): Define.
opcodes/
* ppc-dis.c (ppc_opts): Add "future" entry.
(PREFIX_OPCD_SEGS): Define.
(prefix_opcd_indices): New array.
(disassemble_init_powerpc): Initialize prefix_opcd_indices.
(lookup_prefix): New function.
(print_insn_powerpc): Handle 64-bit prefix instructions.
* ppc-opc.c (PREFIX_OP, PREFIX_FORM, SUFFIX_MASK, PREFIX_MASK),
(PMRR, POWERXX): Define.
(prefix_opcodes): New instruction table.
(prefix_num_opcodes): New constant.
binutils/
* objdump.c (disassemble_bytes): Set WIDE_OUTPUT in flags.
gas/
* config/tc-ppc.c (ppc_setup_opcodes): Handle prefix_opcodes.
(struct insn_label_list): New.
(insn_labels, free_insn_labels): New variables.
(ppc_record_label, ppc_clear_labels, ppc_start_line_hook): New funcs.
(ppc_frob_label, ppc_new_dot_label): Move functions earlier in file
and call ppc_record_label.
(md_assemble): Handle 64-bit prefix instructions. Align labels
that are on the same line as a prefix instruction.
* config/tc-ppc.h (tc_frob_label, ppc_frob_label): Move to
later in the file.
(md_start_line_hook): Define.
(ppc_start_line_hook): Declare.
* testsuite/gas/ppc/prefix-align.d,
* testsuite/gas/ppc/prefix-align.s: New test.
* testsuite/gas/ppc/ppc.exp: Run new test.
This patch avoids for bpf_elf64_le_vec to be referenced in targmatch.h
when building a BFD without BFD64, resulting in an undefined symbol.
This was a regression introduced along with the BPF target.
bfd/ChangeLog:
2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com>
* config.bfd (targ_cpu): Process bpf-*-none only if BFD64.
* configure.ac: Set target_size=64 for bpf_elf64_le_vec and
bpf_elf64_be_vec.
* configure: Regenerate.
This patch adds support for ELF64 eBPF to readelf, and fixes a `nm'
test to run properly in bpf-*-* targets.
binutils/ChangeLog:
2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com>
* readelf.c: Include elf/bpf.h.
(guess_is_rela): Hanle EM_BPF.
(dump_relocations): Likewise.
(is_32bit_abs_reloc): Likewise.
* testsuite/binutils-all/nm.exp: Add bpf-*-* to the list of
ELF targets.
This patch adds support to the linker for the Linux eBPF architecture.
A minimal testsuite is included.
ld/ChangeLog:
2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com>
* Makefile.am (ALL_64_EMULATION_SOURCES): Add eelf64bpf.c.
* Makefile.in (prefix): Regenerate.
* configure.tgt (targ_extra_ofiles): Add case for bpf-*-* targets.
* emulparams/elf64bpf.sh: New file.
* testsuite/lib/ld-lib.exp (check_gc_sections_available): Add
bpf-*-* to the list of targets not supporting gc-sections.
* testsuite/ld-bpf/bar.s: New file.
* testsuite/ld-bpf/jump-1.d: Likewise.
* testsuite/ld-bpf/foo.s: Likewise.
* testsuite/ld-bpf/call-1.d: Likewise.
* testsuite/ld-bpf/bpf.exp: Likewise.
* testsuite/ld-bpf/baz.s: Likewise.
This patch adds support for the Linux kernel eBPF architecture to the
opcodes. The port is based on CGEN.
opcodes/ChangeLog:
2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com>
* configure.ac (SHARED_DEPENDENCIES): Add case for bfd_bpf_arch.
* configure: Regenerated.
* Makefile.am: Add rules for the files generated from cpu/bpf.cpu
and cpu/bpf.opc.
(HFILES): Add bpf-desc.h and bpf-opc.h.
(TARGET_LIBOPCODES_CFILES): Add bpf-asm.c, bpf-desc.c, bpf-dis.c,
bpf-ibld.c and bpf-opc.c.
(BPF_DEPS): Define.
* Makefile.in: Regenerated.
* disassemble.c (ARCH_bpf): Define.
(disassembler): Add case for bfd_arch_bpf.
(disassemble_init_for_target): Likewise.
(enum epbf_isa_attr): Define.
* disassemble.h: extern print_insn_bpf.
* bpf-asm.c: Generated.
* bpf-opc.h: Likewise.
* bpf-opc.c: Likewise.
* bpf-ibld.c: Likewise.
* bpf-dis.c: Likewise.
* bpf-desc.h: Likewise.
* bpf-desc.c: Likewise.
This patch adds a CPU description for the Linux kernel eBPF virtual
machine, plus supporting code for disassembler and assembler.
cpu/ChangeLog:
2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com>
* bpf.cpu: New file.
* bpf.opc: Likewise.
This patch adds a header file with BPF-specific ELF definitions. In
particular, the architecture relocations.
include/ChangeLog:
2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com>
* elf/bpf.h: New file.
This is to bring in the newly introduced support for bpf-*-* targets.
ChangeLog:
2019-05-23 Jose E. Marchesi <jose.marchesi@oracle.com>
* config.guess: Synchronize with config project master sources.
* config.sub: Likewise.
* readline/support/config.guess: Likewise.
* readline/support/config.sub: Likewise.
git commit 6ec6968b1b results in
... error: linker script file '/usr/local/lib64/libgcc_s.so' appears multiple times
collect2: error: ld returned 1 exit status
FAIL: bootstrap
This patch changes things so that an error is given only when a -T
script or the default script is invoked more than once. I'm still a
little nervous that we match script file names, not the entire path.
PR 24576
* ldfile.c (enum script_open_style): New.
(struct script_name_list): New.
(ldfile_open_command_file_1): Take a script_open_style param
rather than booleans. Adjust callers. Only fail when -T or
default -T script is invoked twice.
(ldfile_try_open_bfd): Revert last change.
I noticed that target_ops::follow_exec took a "char *" parameter,
where "const char *" would be more correct. This patch changes this
(and related functions) to be constified.
Tested by rebuilding.
gdb/ChangeLog
2019-05-22 Tom Tromey <tromey@adacore.com>
* target.c (target_follow_exec): Constify parameter.
* target-delegates.c: Rebuild.
* remote.c (remote_target::follow_exec): Constify parameter.
* infrun.c (follow_exec): Constify parameter.
* target.h (struct target_ops) <follow_exec>: Constify parameter.
(target_follow_exec): Likewise.
