Use the pattern from other projects where we generate the html pages
in a dir named the same as the project. So now we have:
gas/doc/gas.html - single html page
gas/doc/gas/ - multiple html pages
This works for projects that have a doc/ subdir already, but gprof &
ld require a little tweaking since they generate their docs in their
respective toplevels.
This better matches other GNU projects like autoconf/automake where
the html manual is the single page form. We'll support the multi-page
form in a follow up change.
x86-64 uses rela relocations. The comment next to the field's declaration
says "Non-zero values for ELF USE_RELA targets should be viewed with
suspicion ..." And indeed the fields being non-zero causes section
contents to be accumulated into the final relocated values in addition to
the relocations' addends, which is contrary to the ELF spec.
The current PLT generation code will generate invalid code when the PLT
relocation offset exceeds 64k. This fixes the issue by detecting large
plt_reloc offsets and generare code sequences to create larger plt
relocations.
The "large" plt code needs 2 extra instructions to create 32-bit offsets.
bfd/ChangeLog:
PR 27746
* elf32-or1k.c (PLT_ENTRY_SIZE_LARGE, PLT_MAX_INSN_COUNT,
OR1K_ADD, OR1K_ORI): New macros to help with plt creation.
(elf_or1k_link_hash_table): New field plt_count.
(elf_or1k_link_hash_entry): New field plt_index.
(elf_or1k_plt_entry_size): New function.
(or1k_write_plt_entry): Update to support variable size PLTs.
(or1k_elf_finish_dynamic_sections): Use new or1k_write_plt_entry
API.
(or1k_elf_finish_dynamic_symbol): Update to write large PLTs
when needed.
(allocate_dynrelocs): Use elf_or1k_plt_entry_size to account for
PLT size.
ld/ChangeLog:
PR 27746
testsuite/ld-or1k/or1k.exp (or1kplttests): Add tests for linking
along with gotha() relocations.
testsuite/ld-or1k/gotha1.dd: New file.
testsuite/ld-or1k/gotha1.s: New file.
testsuite/ld-or1k/gotha2.dd: New file.
testsuite/ld-or1k/gotha2.s: New file
testsuite/ld-or1k/pltlib.s (x): Define size to avoid link
failure.
Now that we support R_OR1K_GOT_AHI16 we can relax the R_OR1K_GOT16
overflow validation check if the section has R_OR1K_GOT_AHI16.
We cannot simple disable R_OR1K_GOT16 overflow validation as there will
still be binaries that will have only R_OR1K_GOT16. The
R_OR1K_GOT_AHI16 relocation will only be added by GCC when building with
the option -mcmodel=large.
This assumes that R_OR1K_GOT_AHI16 will come before R_OR1K_GOT16, which
is the code pattern that will be emitted by GCC.
bfd/ChangeLog:
PR 21464
* elf32-or1k.c (or1k_elf_relocate_section): Relax R_OR1K_GOT16
overflow check if we have R_OR1K_GOT_AHI16 followed by
R_OR1K_GOT16.
The gotha() relocation mnemonic will be outputted by OpenRISC GCC when
using the -mcmodel=large option. This relocation is used along with
got() to generate 32-bit GOT offsets. This increases the previous GOT
offset limit from the previous 16-bit (64K) limit.
This is needed on large binaries where the GOT grows larger than 64k.
bfd/ChangeLog:
PR 21464
* bfd-in2.h: Add BFD_RELOC_OR1K_GOT_AHI16 relocation.
* elf32-or1k.c (or1k_elf_howto_table, or1k_reloc_map): Likewise.
(or1k_final_link_relocate, or1k_elf_relocate_section,
or1k_elf_check_relocs): Likewise.
* libbfd.h (bfd_reloc_code_real_names): Likewise.
* reloc.c: Likewise.
cpu/ChangeLog:
PR 21464
* or1k.opc (or1k_imm16_relocs, parse_reloc): Define parse logic
for gotha() relocation.
include/ChangeLog:
PR 21464
* elf/or1k.h (elf_or1k_reloc_type): Define R_OR1K_GOT_AHI16 number.
opcodes/ChangeLog:
PR 21464
* or1k-asm.c: Regenerate.
gas/ChangeLog:
PR 21464
* testsuite/gas/or1k/reloc-1.s: Add test for new relocation.
* testsuite/gas/or1k/reloc-1.d: Add test result for new
relocation.
Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
fixup reloc, add tests
When building protobuf we were seeing the assert failure:
/home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
/home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
/home/giuliobenetti/git/upstream/or1k-binutils-2.36.1/host/lib/gcc/or1k-buildroot-linux-uclibc/9.3.0/../../../../or1k-buildroot-linux-uclibc/bin/ld:
BFD (GNU Binutils) 2.36.1 assertion fail elf32-or1k.c:2377
collect2: error: ld returned 1 exit status
This failure happens while writing out PLT entries, there is a check
"BFD_ASSERT (h->dynindx != -1)" to confirm all plt entries have dynamic
symbol attributes. This was failing for symbols that were
"forced_local" in previous linking code.
The fix adds logic to or1k_elf_adjust_dynamic_symbol to identify
"forced_local" symbols and exclude them from the the PLT.
bfd/ChangeLog:
PR 27624
* elf32-or1k.c (or1k_elf_adjust_dynamic_symbol): Change
condition used to cleanup plt entries to cleanup forced local
entries.
Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
* libbfd.c (bfd_malloc): Provide some documenation. Treat a size
of 0 as 1.
(bfd_realloc): Likewise.
(bfd_zmalloc): Likewise.
(bfd_realloc_or_free): Provide some documentation. Treat a size
of 0 as a request to free.
* libbfd-in.h (bfd_realloc): Remove prototype.
(bfd_realloc_or_free): Remove prototype.
(bfd_zmalloc): Remove prototype.
* libbfd.h: Regenerate.
Relocations with a bitsize matching the architecture's address width
can't usefully use an overflow checking approach other than "dont" or
"signed": All others involve perhaps complex calculations in
_bfd_relocate_contents() (or, not as severe, in bfd_check_overflow())
without ever finding anything to complain about - because of the address
width masking applied. Avoid this unnecessary overhead and switch all
such reloc types to "dont".
Note that "signed" checking with rela relocations (i.e. x86-64 here) is
only going to be useful if the addend actually got passed to
_bfd_relocate_contents() (and maybe others) instead of bogusly adding in
prior section contents (which apparently is assumed to be zero, and
hence again no overflow would ever be detected). See
https://sourceware.org/pipermail/binutils/2021-April/116164.html.
This makes the default for ppc to keep dynamic relocs on undefweak
symbols when the code won't cause DT_TEXTREL (for instance when -fPIE
or -fPIC). If ld is given -z dynamic-undefined-weak then dynamic
relocations will be created for non-PIC at the expense of possibly
causing DT_TEXTREL to be set on ppc32. Note that DT_TEXTREL and GNU
indirect functions are incompatible.
* elf32-ppc.c (allocate_dynrelocs): Keep dyn_relocs for undefweak
symbols when -z dynamic-undefined-weak or when there are no
dynamic relocs in read-only sections and -z nodynamic-undefined-weak
is not given.
* elf64-ppc.c (allocate_dynrelocs): Likewise.
It's slightly weird to have a call to a weak function not protected by
a test of that function being non-NULL, but the non-NULL test might be
covered by a test of another function. For example:
if (func1)
{
func1 ();
func2 ();
}
where func2 is known to exist if func1 exists.
* elf32-ppc.c (allocate_dynrelocs): Call ensure_undef_dynamic for
weak undefined symols that only appear on PLT relocs.
* elf64-ppc.c (allocate_dynrelocs): Likewise.
PR 27793
* som.c (som_slurp_symbol_table): Assign symbols without any scope
to the undefined section.
(som_decode_symclass): Check for a missing symbol section.
* syms.c (bfd_decode_symclass): Likewise.
PR 27792
* som.c (som_slurp_string_table): Place a terminating NUL byte at
the end of the table.
(som_slurp_symbol_table): Check for an over-large offset into the
string string table.
bfd * elf.c (_bfd_elf_maybe_function_sym): Do not accept annobin
symbols as potential function symbols.
* elfnn-aarch64.c (elfNN_aarch64_maybe_function_sym): Likewise.
* elf64-ppc.c (ppc64_elf_maybe_function_sym): Likewise.
* elf32-arm.c (elf32_arm_maybe_function_sym): Likewise.
ld * testsuite/ld-elf/anno-sym.s: New test source file.
* testsuite/ld-elf/anno-sym.d: New test driver.
* testsuite/ld-elf/anno-sym.l: New test error output.
The only insn requiring a truly 16-bit PC-relative relocation outside of
16-bit mode is XBEGIN (with an operand size override). For it, the
relocation generated should behave similar to 8- and (for 64-bit) 32-bit
PC-relatives ones, i.e. be checked for a signed value to fit the field.
This same mode is also correct for 16-bit code. Outside of 16-bit code,
branches with operand size overrides act in a truly PC-relative way only
when living in the low 32k of address space, as they truncate rIP to 16
bits. This can't be expressed by a PC-relative relocation.
Putting in place a new testcase, I'd like to note that the two existing
ones (pcrel16 and pcrel16abs) appear to be pretty pointless: They don't
expect any error despite supposedly checking for overflow, and in fact
there can't possibly be any error for the
- former since gas doesn't emit any relocation in the first place there,
- latter because the way the relocation gets expressed by gas doesn't
allow the linker to notice the overflow; it should be detected by gas
if at all, but see above (an error would be reported here for x86-64
afaict, but this test doesn't get re-used there).
The change implementing the .persistent family of sections broke the
existing support for the .persistent.bss section in the compiler:
int a __attribute__ ((section (".persistent.bss")));
t.s: Assembler messages:
t.s:4: Warning: setting incorrect section type for .persistent.bss
The compiler encodes it as @nobits but the assembler expects @progbits.
The assembler is incorrect and should treat the section like the compiler.
bfd/
* elf.c (special_sections_p): Add .persistent.bss.
gas/
* testsuite/gas/elf/section25.d: Run it everywhere.
* testsuite/gas/elf/section26.d: Likewise.
* testsuite/gas/elf/section26.s: Add test for .persistent.bss.
These are marker relocations, so together with their bit size being zero
their byte size should be zero as well. This is expressed by a value of
3, not 0.
bfd/ChangeLog:
* coff-rs6000.c (_bfd_xcoff_swap_aux_in): Add errors for
unsupported storage class or auxialiry entries.
Improve and adapt to new aux structures.
Add C_DWARF support.
(_bfd_xcoff_swap_aux_out): Likewise.
* coff64-rs6000.c (_bfd_xcoff64_swap_aux_in): Likewise.
(_bfd_xcoff64_swap_aux_out): Likewise.
binutils/ChangeLog:
* od-xcoff.c (dump_xcoff32_symbols): Adapt to new
aux structures.
include/ChangeLog:
* coff/internal.h (union internal_auxent):
Add x_sect structure.
* coff/rs6000.h (union external_auxent): Rework to
match official documentation.
* coff/rs6k64.h (union external_auxent): Likewise.
(_AUX_SECT): New define.
PR 27760
include * coff/pe.h (IMAGE_DLLCHARACTERISTICS_APPCONTAINER): Define.
(IMAGE_DLLCHARACTERISTICS_GUARD_CF): Define.
bfd * peXXigen.c (_bfd_XX_print_private_bfd_data_common): Add display
of IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP,
IMAGE_FILE_NET_RUN_FROM_SWAP and IMAGE_FILE_UP_SYSTEM_ONLY flags.
Decode the contents of the DllCharacteristics field.
