Age | Commit message (Collapse) | Author | Files | Lines |
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On powerpc32, making ifuncs have non-default visibility in shared
libraries or pies can result in runtime failures. The problem is that
if gcc is told that a given function has non-default visibility, then
calls to that function are assumed to be local (which is true) and
thus need not go via a plt call stub (which is false for ifunc). If
the caller has no other reason to set up the got pointer (r30), code
won't be emitted to do so. However, a pic plt call stub makes use of
r30 to load the plt entry. So a call to an ifunc, which always needs
a plt entry, will fail.
This patch makes ld emit an error for the problem case, and allows
calls to non-default visibility ifuncs to work in normal executables.
I also fix some cases where ifuncs fail when using the old bss-plt.
* elf32-ppc.c (ppc_elf_check_relocs): For @local call to ifunc,
error when shared and force a plt call otherwise.
(ppc_elf_size_dynamic_sections): Don't emit DT_PPC_GOT unless
plt_type == PLT_NEW.
(ppc_elf_relocate_section): Add missing test to resolve ifuncs to
the appropriate call stub.
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Instead, fix Jakub's original code setting up the PR_GNU_RELRO header
from the PT_LOAD header.
PR ld/14207
PR ld/16322
PR binutils/16323
bfd/
* elf.c (assign_file_positions_for_load_sections): Revert last change.
(assign_file_positions_for_non_load_sections): When setting up
PT_GNU_RELRO header, don't require a corresponding PT_LOAD
header that completely covers the relro region.
ld/
* ldlang.c (lang_size_sections): Remove unneeded RELRO base
adjust. Tidy comments.
* ld.texinfo (DATA_SEGMENT_RELRO_END): Correct description.
ld/testsuite/
* ld-x86-64/pr14207.d: Adjust
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bfd/
2014-01-09 Tristan Gingold <gingold@adacore.com>
* coff-rs6000.c (rs6000coff_vec, pmac_xcoff_vec): use jump
table macros and add macros to initializa the structure.
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This patch fixes 2 GNU_RELRO segment bugs:
1. lang_size_sections didn't properly align base to the maximum
alignment power of sections between DATA_SEGMENT_ALIGN and
DATA_SEGMENT_RELRO_END.
2. ld failed to adjust LOAD segment to generate GNU_RELRO segment
when LOAD segment doesn't fit GNU_RELRO segment. This is
https://sourceware.org/bugzilla/show_bug.cgi?id=14207
We "fixed" ld by not generating GNU_RELRO segment. This patch
adjusts LOAD segment to generate GNU_RELRO segment. It fixes
PR ld/16322 and at the same time it also fixes PR binutils/16323
since now we can adjust LOAD segment if it is too small.
bfd/
PR ld/14207
PR ld/16322
PR binutils/16323
* elf.c (_bfd_elf_map_sections_to_segments): Don't check section
size for PT_GNU_RELRO segment.
(assign_file_positions_for_load_sections): If PT_LOAD segment
doesn't fit PT_GNU_RELRO segment, adjust its p_filesz and p_memsz.
ld/
PR ld/14207
PR ld/16322
PR binutils/16323
* ldlang.c (lang_size_sections): Properly align RELRO base.
ld/testsuite/
PR ld/14207
PR ld/16322
PR binutils/16323
* ld-elf/pr16322.d: New file.
* ld-elf/pr16322.s: Likewise.
* ld-x86-64/pr14207.d: Expect PT_GNU_RELRO segment.
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This removes the last uses of the obsolete VA_* macros from binutils.
All the binutils and bfd changes were tested by rebuilding.
I didn't rebuild the gas change but I think it is obviously correct.
2014-01-07 Tom Tromey <tromey@redhat.com>
* elf32-xtensa.c (vsprint_msg): Don't use old VA_* compatibility
wrappers.
2014-01-07 Tom Tromey <tromey@redhat.com>
* bucomm.c (fatal, non_fatal): Replace obsolete VA_* macros with
stdarg macros.
* dlltool.c (inform): Replace obsolete VA_* macros with stdarg
macros.
* dllwrap.c (inform, warn): Replace obsolete VA_* macros with
stdarg macros.
2014-01-07 Tom Tromey <tromey@redhat.com>
* config/tc-tic30.c (debug): Avoid old VA_* compatibility
wrappers.
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* elf.c (vma_page_aligned_bias): Handle a maxpagesize value of
zero.
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* pef.c (bfd_pef_xlib_read_header): Increase buffer size to 80.
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* archive.c (_bfd_get_elt_at_filepos): Store a copy of the
filename in the bfd's filename field.
* elfcode.h (bfd_from_remote_memory): Likewise.
* ieee.c (ieee_object_p): Likewise.
* mach-o.c (bfd_mach_o_fat_member_init): Likewise.
* oasys.c (oasys_openr_next_archived_file): Likewise.
* vms-lib.c (_bfd_vms_lib_get_module): Likewise.
* opncls.c (bfd_fopen): Likewise.
(bfd_openstreamr): Likewise.
(bfd_openr_iovec): Likewise.
(bfd_openw): Likewise.
(bfd_create): Likewise.
(_bfd_delete_bfd): Free filename.
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pointer arithmetic.
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Don't attempt to merge CIEs with a larger number of insns than will
fit in the buffer.
* elf-eh-frame.c (cie_eq): Return false when initial_insn_length
is too large.
(cie_compute_hash): Don't exceed bounds of initial_instructions.
(_bfd_elf_parse_eh_frame): Always set initial_insn_length, and
save as much of insns to initial_instructions[] as will fit.
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It is a good pratice to set the SHF_INFO_LINK bit when the sh_info field
represents a section header index.
bfd/
PR binutils/16317
* elf.c (assign_section_numbers): Set the SHF_INFO_LINK bit for
SHT_REL/SHT_RELA sections when setting the sh_info field.
binutils/testsuite/
PR binutils/16317
* binutils-all/readelf.s: Updated.
* binutils-all/readelf.s-64: Likewise.
ld/testsuite/
PR binutils/16317
* ld-elf/linkinfo1.s: New file.
* ld-elf/linkinfo1a.d: Likewise.
* ld-elf/linkinfo1b.d: Likewise.
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so that it is shorter than 80.
peXXigen.c (rsrc_cmp): Fix unused variable warning.
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__CYGWIN__ or __MINGW32__ macro is defined.
(rsrc_cmp): Fix Windows host version and version without wchar header.
[__CYGWIN__, __MINGW32__]: Introduce rsrccmp macro.
Fix coding standard issues.
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* elf32-m68k.c (elf_m68k_add_symbol_hook): New function.
(elf_backend_add_symbol_hook): Define.
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pointer arithmetic.
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* elf32-arm.c (elf32_arm_post_process_headers): Call
_bfd_elf_post_process_headers.
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* elf32-spu.c (spu_elf_post_process_headers): Call
_bfd_elf_post_process_headers.
* elfxx-mips.c (_bfd_mips_post_process_headers): Likewise.
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* elf-bfd.h (_bfd_elf_set_osabi): Renamed to ...
(_bfd_elf_post_process_headers): This.
* elf.c (_bfd_elf_compute_section_file_positions): Always
call elf_backend_post_process_headers.
(_bfd_elf_set_osabi): Renamed to ...
(_bfd_elf_post_process_headers): This.
* elf32-hppa.c (elf_backend_post_process_headers): Removed.
* elf32-i370.c (elf_backend_post_process_headers): Likewise.
* elf32-msp430.c (elf_backend_post_process_headers): Likewise.
* elf32-ppc.c (elf_backend_post_process_headers): Likewise.
* elf32-sparc.c (elf_backend_post_process_headers): Likewise.
* elf64-hppa.c (elf_backend_post_process_headers): Likewise.
* elf64-ppc.c (elf_backend_post_process_headers): Likewise.
* elf64-sparc.c (elf_backend_post_process_headers): Likewise.
* elf64-x86-64.c (elf_backend_post_process_headers): Likewise.
* (elf_backend_post_process_headers): Likewise.
* (elf_backend_post_process_headers): Likewise.
* elf32-i386.c (elf_backend_post_process_headers): Don't
define as _bfd_elf_set_osabi.
(elf_i386_fbsd_post_process_headers): Updated.
* elf32-mips.c (elf_fbsd_post_process_headers): Removed.
(elf_backend_post_process_headers): Likewise.
* elf32-tic6x.c (elf32_tic6x_set_osabi): Removed.
(elf_backend_post_process_headers): Likewise.
* elf64-mips.c (elf_fbsd_post_process_headers): Removed.
(elf_backend_post_process_headers): Likewise.
* elfn32-mips.c (elf_fbsd_post_process_headers): Removed.
(elf_backend_post_process_headers): Likewise.
* elfnn-aarch64.c (elfNN_aarch64_post_process_headers): Updated.
* elfxx-target.h (elf_backend_post_process_headers): Default
to _bfd_elf_post_process_headers.
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PR binutils/16318
* elf32-arm.c (elf32_arm_copy_private_bfd_data): Call
_bfd_elf_copy_private_bfd_data.
* elf32-bfin.c (bfin_elf_copy_private_bfd_data): Removed.
(elf32_bfinfdpic_copy_private_bfd_data): Likewise.
(bfd_elf32_bfd_copy_private_bfd_data): Don't define.
* elf32-frv.c (frv_elf_copy_private_bfd_data): Removed.
(elf32_frvfdpic_copy_private_bfd_data): Likewise.
(bfd_elf32_bfd_copy_private_bfd_data): Don't define.
* elf32-iq2000.c (iq2000_elf_copy_private_bfd_data): Removed.
(bfd_elf32_bfd_copy_private_bfd_data): Don't define.
* elf32-lm32.c (lm32_elf_copy_private_bfd_data): Removed.
(lm32_elf_fdpic_copy_private_bfd_data): Call
_bfd_elf_copy_private_bfd_data.
* elf32-mep.c (mep_elf_copy_private_bfd_data): Removed.
(bfd_elf32_bfd_copy_private_bfd_data): Don't define.
* elf32-msp430.c (elf32_msp430_copy_private_bfd_data): Removed.
(bfd_elf32_bfd_copy_private_bfd_data): Don't define.
* elf32-mt.c (mt_elf_copy_private_bfd_data): Removed.
(bfd_elf32_bfd_copy_private_bfd_data): Don't define.
* elf32-sh.c (sh_elf_set_private_flags): Removed.
(sh_elf_copy_private_data): Call _bfd_elf_copy_private_bfd_data
and sh_elf_set_mach_from_flags.
* elfnn-aarch64.c (elfNN_aarch64_copy_private_bfd_data): Removed.
(bfd_elfNN_bfd_copy_private_bfd_data): Don't define.
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* peXXigen.c (rsrc_process_section): Rename index to indx.
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Include safe-ctype.h.
(HighBitSet, SetHighBit, WithoutHighBit): New macros.
(pe_print_resource_entries): Rename to
rsrc_print_resource_entries. Handle names that are not RVAs.
(pe_print_resource_directory): Rename to
rsrc_print_resource_directory.
(pe_print_rsrc): Rename to rsrc_print_section. Corrupt
computation of RVA bias.
(rsrc_count_entries): New function.
(rsrc_count_directory): New function.
(rsrc_parse_entry): New function.
(rsrc_parse_entries): New function.
(rsrc_parse_directory): New function.
(rsrc_write_string): New function.
(rsrc_compute_rva): New function.
(rsrc_write_leaf): New function.
(rsrc_write_entry): New function.
(rsrc_write_directory): New function.
(u16_mbtouc): New function.
(rsrc_cmp): New function.
(rsrc_print_name): New function.
(rsrc_resource_name): New function.
(rsrc_merge_string_entries): New function.
(rsrc_sort_entries): New function.
(rsrc_attach_chain): New function.
(rsrc_merge): New function.
(rsrc_process_section): New function - merges the contents of a
.rsrc section.
(_bfd_XXi_final_link_postscript): Call rsrc_process_section.
* configure.in (AC_CHECK_HEADERS): Add wchar.h
* config.in: Regenerate.
* configure: Regenerate.
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