H.J. Lu [Sun, 11 Jan 2015 16:04:27 +0000 (08:04 -0800)]
Only discard space for pc-relative relocs symbols
When building PIE, we should only discard space for pc-relative relocs
symbols which turn out to need copy relocs.
bfd/
PR ld/17827
* elf64-x86-64.c (elf_x86_64_allocate_dynrelocs): For PIE,
only discard space for pc-relative relocs symbols which turn
out to need copy relocs.
H.J. Lu [Mon, 5 Jan 2015 12:42:37 +0000 (04:42 -0800)]
Assign file position for .strtab only if needed
bfd/
PR ld/17773
* elflink.c (bfd_elf_final_link): Assign the file position for
the symbol string table only there are symbols to be emitted.
ld/testsuite/
PR ld/17773
* ld-elf/binutils.exp (binutils_test): Add an optional
readelf_options. Replace -l with $readelf_options. Add a
gap test.
* ld/testsuite/ld-elf/gap.s: New file.
Matthew Fortune [Tue, 16 Dec 2014 12:39:22 +0000 (12:39 +0000)]
Rework the alignment check for BFD_RELOC_MIPS_18_PCREL_S3.
gas/
* config/tc-mips.c (md_apply_fix): Apply alignment check
to the symbol and offset rather than *valP for
BFD_RELOC_MIPS_18_PCREL_S3. Also update the error message
for BFD_RELOC_MIPS_19_PCREL_S2.
gas/testsuite/
* gas/mips/r6-64.s: Remove .align directives from LDPC
instructions and add further tests for LDPC.
* gas/mips/r6-64-n32.d: remove the NOPs from LDPC expected
output and update for new tests.
* gas/mips/r6-64-n64.d: Likewise.
* gas/mips/ldpc-unalign.l: New file.
* gas/mips/ldpc-unalign.s: Likewise.
* gas/mips/mips.exp: Run ldpc-unalign test.
Matthew Fortune [Thu, 18 Dec 2014 20:08:38 +0000 (20:08 +0000)]
Fix undefined weak symbol reloc tests
ld/testsuite/
* ld-mips-elf/mips-elf.exp: Update undefweak-overflow tests.
* ld-mips-elf/undefweak-overflow-n32.d: Remove.
* ld-mips-elf/undefweak-overflow-n64.d: Likewise.
* ld-mips-elf/undefweak-overflow.s: Set mips64r6, noreorder and
add a label to mark the micromips region.
* ld-mips-elf/undefweak-overflow.d: Update expected output.
Andrew Bennett [Thu, 20 Nov 2014 15:40:16 +0000 (15:40 +0000)]
[MIPS] When calculating a relocation using an undefined weak symbol don't check for overflow.
In MIPS the relocation calculation only ignores the overflow checks for undefined
weak symbols on relocations associated with j/jal. This patch extends this to
the relocations used by the: b* instructions; pc/gp relative symbol offsets; and the
lwpc/ldpc MIPS r6 instructions.
bfd/
* elfxx-mips.c (mips_elf_calculate_relocation): Only check for overflow
on non-weak undefined symbols.
ld/testsuite/
* ld-mips-elf/mips-elf.exp: Add in undefined weak overflow tests for
o32, n32 and n64.
* ld-mips-elf/undefweak-overflow.s: New test.
* ld-mips-elf/undefweak-overflow.d: New test.
* ld-mips-elf/undefweak-overflow-n32.d: New test.
* ld-mips-elf/undefweak-overflow-n64.d: New test.
H.J. Lu [Sun, 14 Dec 2014 07:37:22 +0000 (23:37 -0800)]
Handle weak alias for PIE with copy reloc
When there is a weak symbol with a real definition, the processor
independent code will have arranged for us to see the real definition
first. We need to copy the needs_copy bit from the real definition and
check it when allowing copy reloc in PIE.
bfd/
PR ld/17689
* elf64-x86-64.c (elf_x86_64_link_hash_entry): Add needs_copy.
Change has_bnd_reloc to bit field.
(elf_x86_64_link_hash_newfunc): Initialize needs_copy and
has_bnd_reloc to 0.
(elf_x86_64_check_relocs): Set has_bnd_reloc to 1 instead
of TRUE.
(elf_x86_64_adjust_dynamic_symbol): Copy needs_copy from the
real definition to a weak symbol.
(elf_x86_64_allocate_dynrelocs): Also check needs_copy of a
weak symbol for PIE when discarding space for relocs against
symbols which turn out to need copy relocs.
(elf_x86_64_relocate_section): Also check needs_copy of a
weak symbol for PIE with copy reloc.
H.J. Lu [Thu, 4 Dec 2014 22:19:41 +0000 (14:19 -0800)]
Add _bfd_elf_ifunc_get_synthetic_symtab
In i386 and x86-64 binaries with ifunc, relocations against .got.plt
section may not be in the same order as entries in PLT section. This
patch adds _bfd_elf_ifunc_get_synthetic_symtab. It takes a function
pointer which returns an array of PLT entry symbol values. It calls
the function pointer to get the PLT entry symbol value array indexed
by relocation index, instead of calling plt_sym_val on each relocation
index.
Mixing 64-bit and 32-bit types led to the wrong promotions. Keep
calculation in same type. Also fix a case where PLTREL24 reloc addend
should be ignored.
* Powerpc.cc (Target_powerpc::Branch_info::make_stub): Ignore
addend of PLTREL24 reloc when not generating a plt stub. Make
max_branch_offset an "Address".
(Target_powerpc::Relocate::relocate): Make max_branch_offset
an "Address".
Alan Modra [Wed, 3 Dec 2014 05:47:23 +0000 (16:17 +1030)]
powerpc gold, work around pr17670
pr17670 is about an assert triggering on a branch to an undefined
weak symbol, the symbol being undefined due to dropping its comdat
group section. (Well sort of. The symbol is actually defined in
an .opd section which isn't part of the group, but the code section
the opd entry points at is dropped.) So don't assert.
Also, don't make long branch stubs to such symbols, and arrange to
have target-reloc.h code warn when applying relocs that use the sym.
PR 17670
* symtab.cc (Symbol::set_undefined): Remove assertion.
* powerpc.cc (Target_powerpc::symval_for_branch): Don't assert
on symbols defined in discarded sections, instead return false.
Rearrange params, update all callers.
(Target_powerpc::Branch_info::make_stub): Don't make stubs for
branches to syms in discarded sections.
(Global_symbol_visitor_opd::operator()): Set discarded opd syms
undefined and flag as discarded.
(Target_powerpc::Relocate::relocate): Localize variable.
H.J. Lu [Tue, 2 Dec 2014 23:14:28 +0000 (15:14 -0800)]
X86-64: Allow copy relocs for building PIE
This patch allows copy relocs for non-GOT pc-relative relocation in PIE.
bfd/
* elf64-x86-64.c (elf_x86_64_create_dynamic_sections): Always
allow copy relocs for building executables.
(elf_x86_64_adjust_dynamic_symbol): Allocate copy relocs for
PIE.
(elf_x86_64_allocate_dynrelocs): For PIE, discard space for
relocs against symbols which turn out to need copy relocs.
(elf_x86_64_relocate_section): Don't copy a pc-relative
relocation into the output file if the symbol needs copy reloc.
Alan Modra [Thu, 27 Nov 2014 04:46:49 +0000 (15:16 +1030)]
Don't output symbol version definitions for non-DT_NEEDED libs
PR 16452, 16457
* elflink.c (_bfd_elf_link_find_version_dependencies): Exclude
symbols from libraries that won't be listed in DT_NEEDED.
(elf_link_output_extsym): Don't output verdefs for such symbols.
projects / thirdparty / binutils-gdb.git / log
