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5446cbdf82
This implements a work-around for an icache bug on 476 that can cause
execution of stale instructions when control falls through from one
page to the next. The idea is to prevent such fall-through by
replacing the last instruction on a page with a branch to a patch
area containing the instruction, then branch to the next page.
The patch also fixes a number of bugs in the existing support for long
branch trampolines.
bfd/
* elf32-ppc.c (struct ppc_elf_link_hash_table): Add params.
Delete emit_stub_syms, no_tls_get_addr_opt. Update all uses.
(ppc_elf_link_params): New function.
(ppc_elf_create_glink): Align .glink to 64 bytes for ppc476
workaround.
(ppc_elf_select_plt_layout): Remove plt_style and emit_stub_syms
parameters. Use htab->params instead.
(ppc_elf_tls_setup): Remove no_tls_get_addr_opt parameter.
(ppc_elf_size_dynamic_sections): Align __glink_PLTresolve to
64 bytes for ppc476 workaround.
(struct ppc_elf_relax_info): New.
(ppc_elf_relax_section): Exclude linker created sections and
those too small to hold one instruction. Don't add another
branch around trampolines on later relax passes. Don't
generate trampolines for undefined symbols when !relocatable,
nor for plugin symbols. Allocate space for ppc476 workaround
patch area. Free fixups on error return path.
(ppc_elf_relocate_section): Handle ppc476 workaround patching.
* elf32-ppc.h (struct ppc_elf_params): New.
(ppc_elf_select_plt_layout, ppc_elf_tls_setup): Update prototype.
(ppc_elf_link_params): Declare.
* section.c (SEC_INFO_TYPE_TARGET): Define.
* bfd-in2.h: Regenerate.
ld/
* emultempl/ppc32elf.em (no_tls_get_addr_opt, emit_stub_syms)
plt_style): Delete. Adjust all refs to instead use..
(params): ..this. New variable.
(ppc_after_open_output): New function. Tweak params and pass to
ppc_elf_link_params.
(ppc_after_open): Adjust ppc_elf_select_plt_layout call.
(ppc_before_allocation): Adjust ppc_elf_tls_setup call. Enable
relaxation for ppc476 workaround.
(PARSE_AND_LIST_*): Add --{no-,}ppc476-workaround support.
(LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS): Define.
219 lines
7.3 KiB
Plaintext
219 lines
7.3 KiB
Plaintext
2014-02-03 Alan Modra <amodra@gmail.com>
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* emultempl/ppc32elf.em (no_tls_get_addr_opt, emit_stub_syms)
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plt_style): Delete. Adjust all refs to instead use..
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(params): ..this. New variable.
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(ppc_after_open_output): New function. Tweak params and pass to
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ppc_elf_link_params.
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(ppc_after_open): Adjust ppc_elf_select_plt_layout call.
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(ppc_before_allocation): Adjust ppc_elf_tls_setup call. Enable
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relaxation for ppc476 workaround.
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(PARSE_AND_LIST_*): Add --{no-,}ppc476-workaround support.
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(LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS): Define.
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2014-02-02 Sebastian Huber <sebastian.huber@embedded-brains.de>
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* ld/ld.texinfo: Change ALIGN_WITH_INPUT documentation.
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* ld/ldlang.c (lang_size_sections_1): Add dotdelta
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variable which reflects the VMA change due to alignment
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requirements. Use dotdelta do change the LMA if
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ALIGN_WITH_INPUT is requested.
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2014-02-01 Hans-Peter Nilsson <hp@bitrange.com>
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* emultempl/mmix-elfnmmo.em (mmix_after_allocation): Fix typo in
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call to bfd_set_section_vma exposed by recent bfd_set_section_vma
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change.
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2014-01-30 Sandra Loosemore <sandra@codesourcery.com>
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* Makefile.am (enios2elf.c, enios2linux.c): Update dependencies.
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* Makefile.in: Regenerated.
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* emulparams/nios2elf.sh (EXTRA_EM_FILE): Set.
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* emulparams/nios2linux.sh (EXTRA_EM_FILE): Set.
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* emultempl/nios2elf.em: New file.
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* gen-doc.texi (NIOSII): Set.
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* ld.texinfo (NIOSII): Set.
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2014-01-28 Nick Clifton <nickc@redhat.com>
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* Makefile.am: Remove obsolete MSP430 emulations.
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* configure.tgt: Likewise.
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* emulparams/msp430all.sh: Likewise.
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* Makefile.in: Regenerate.
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2014-01-24 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/16498
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* emultempl/elf32.em (gld${EMULATION_NAME}_place_orphan): Improve
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orphaned TLS section handling.
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2014-01-24 Alan Modra <amodra@gmail.com>
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* ldlang.c (lang_output_section_find_by_flags): Be careful to
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test look->bfd_section->flags if available rather than
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look->flags. Separate SEC_THREAD_LOCAL handling from
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SEC_READONLY loop, and rewrite.
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2014-01-22 Alan Modra <amodra@gmail.com>
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* ldlang.c (asneeded_list_head, asneeded_list_tail): New vars.
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(lang_init): Initialise them.
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(lang_print_asneeded): New function.
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(lang_process): Call lang_print_asneeded.
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* ldlang.h (struct asneeded_minfo): New.
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(asneeded_list_tail): Declare.
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* ldmain.c (add_archive_element): Improve archive map heading.
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* ldmisc.c (minfo): Stash --as-needed info.
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2014-01-22 Alan Modra <amodra@gmail.com>
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* ld.h (struct map_symbol_def): Move to..
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* ldlang.h: ..here.
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* ldlang.c (print_assignment): Don't set expld.assign_name to dot.
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2014-01-22 Alan Modra <amodra@gmail.com>
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* ld.texinfo (Output Section Discarding): Mention assigning to dot
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as a way of keeping otherwise empty sections.
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* ldexp.c (is_dot, is_value, is_sym_value, is_dot_ne_0,
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is_dot_plus_0, is_align_conditional): New predicates.
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(exp_fold_tree_1): Set SEC_KEEP when assigning to dot inside an
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output section, except for some special cases.
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* scripttempl/elfmicroblaze.sc: Use canonical form to align at
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end of .heap and .stack.
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2014-01-20 Marcus Shawcroft <marcus.shawcroft@arm.com>
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* emulparams/aarch64linuxb.sh (ELF_INTERPRETER_NAME): Define.
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2014-01-20 Marcus Shawcroft <marcus.shawcroft@arm.com>
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* emulparams/aarch64linux.sh (ELF_INTERPRETER_NAME): Define.
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2014-01-20 Alan Modra <amodra@gmail.com>
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* ldlang.h (struct lang_definedness_hash_entry): Add by_object and
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by_script. Make iteration a single bit field.
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(lang_track_definedness, lang_symbol_definition_iteration): Delete.
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(lang_symbol_defined): Declare.
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* ldlang.c (lang_statement_iteration): Expand comment a little.
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(lang_init <lang_definedness_table>): Make it bigger.
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(lang_track_definedness, lang_symbol_definition): Delete.
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(lang_definedness_newfunc): Update.
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(lang_symbol_defined): New function.
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(lang_update_definedness): Create entries here. Do track whether
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script definition of symbol is valid, even when also defined in
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an object file.
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* ldexp.c (fold_name <DEFINED>): Update.
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(fold_name <NAME>): Allow self-assignment for absolute symbols
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defined in a linker script.
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2014-01-20 Guy Martin <gmsoft@tuxicoman.be>
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Alan Modra <amodra@gmail.com>
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* ldlang.h (lang_output_section_get): Define.
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* ldlang.c (lang_output_section_get): Likewise.
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(init_os): Set the output_section userdata to the output
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section statement.
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* emultempl/hppaelf.em: Use lang_output_section_get instead of
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lang_output_section_find where applicable.
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* emultempl/aarch64elf.em: Likewise.
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* emultempl/aix.em: Likewise.
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* emultempl/armelf.em: Likewise.
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* emultempl/m68hc1xelf.em: Likewise.
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* emultempl/metagelf.em: Likewise.
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* emultempl/mipself.em: Likewise.
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* emultempl/ppc64elf.em: Likewise.
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* emultempl/spuelf.em: Likewise.
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2014-01-17 Alan Modra <amodra@gmail.com>
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* genscripts.sh (COMPILE_IN): Don't set if already set.
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* emulparams/nds32elf.sh: Don't clear EMULATION_LIBPATH, set
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COMPILE_IN=no.
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* emulparams/nds32elf16m.sh: Likewise.
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* emulparams/nds32elf_linux.sh: Likewise.
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* emultempl/aix.em: Test COMPILE_IN value is "yes".
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* emultempl/armcoff.em: Likewise.
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* emultempl/elf32.em: Likewise.
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* emultempl/generic.em: Likewise.
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* emultempl/gld960.em: Likewise.
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* emultempl/gld960c.em: Likewise.
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* emultempl/linux.em: Likewise.
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* emultempl/lnk960.em: Likewise.
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* emultempl/m68kcoff.em: Likewise.
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* emultempl/sunos.em: Likewise.
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* emultempl/ticoff.em: Likewise.
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2014-01-16 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/16456
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* genscripts.sh: Don't search directory with LIBPATH_SUFFIX_SKIP
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suffix.
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* emulparams/elf32_x86_64.sh (LIBPATH_SUFFIX_SKIP): Set to 64
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for elf32_x86_64 emulation.
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* emulparams/elf_i386.sh (LIBPATH_SUFFIX_SKIP): Set to 64
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for elf_i386 emulation.
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2014-01-16 Alan Modra <amodra@gmail.com>
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* ld.h (fat_section_userdata_type, get_userdata): Move to..
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* ldlang.h (input_section_userdata_type, get_userdata): ..here.
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* ldlang.c (init_map_userdata): Delete. Fold into..
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(sort_def_symbol): ..here. Don't attach input section userdata
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to output sections or global bfd sections.
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(lang_map): Don't pre-allocate input section userdata.
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(init_os): Don't allocate userdata for output sections.
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(print_all_symbols): Update.
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2014-01-15 H.J. Lu <hongjiu.lu@intel.com>
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* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
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Silence uninitialized warning on ehdr_start_save with older
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GCC.
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2014-01-15 Alan Modra <amodra@gmail.com>
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* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation): Define
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__ehdr_start before size_dynamic_sections and restore afterwards.
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2014-01-10 Alan Modra <amodra@gmail.com>
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PR ld/14207
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PR ld/16322
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PR binutils/16323
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* ldlang.c (lang_size_sections): Remove unneeded RELRO base
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adjust. Tidy comments.
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* ld.texinfo (DATA_SEGMENT_RELRO_END): Correct description.
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2014-01-10 Hans-Peter Nilsson <hp@axis.com>
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* emulparams/crislinux.sh (COMMONPAGESIZE): Define.
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2014-01-08 H.J. Lu <hongjiu.lu@intel.com>
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PR ld/14207
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PR ld/16322
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PR binutils/16323
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* ldlang.c (lang_size_sections): Properly align RELRO base.
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2014-01-08 H.J. Lu <hongjiu.lu@intel.com>
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* ldver.c (ldversion): Update copyright year to 2014.
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For older changes see ChangeLog-2013
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Copyright (C) 2014 Free Software Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.
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Local Variables:
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mode: change-log
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left-margin: 8
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fill-column: 74
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version-control: never
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End:
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