This is one part of the fix for PR109128, along with a corresponding
binutils's linker change. Without this patch, what happens in the
linker, when an unused object in a .a file has offload data, is that
elf_link_is_defined_archive_symbol calls bfd_link_plugin_object_p,
which ends up calling the plugin's claim_file_handler, which then
records the object as one with offload data. That is, the linker never
decides to use the object in the first place, but use of this _p
interface (called as part of trying to decide whether to use the
object) results in the plugin deciding to use its offload data (and a
consequent mismatch in the offload data present at runtime).
The new hook allows the linker plugin to distinguish calls to
claim_file_handler that know the object is being used by the linker
(from ldmain.c:add_archive_element), from calls that don't know it's
being used by the linker (from elf_link_is_defined_archive_symbol); in
the latter case, the plugin should avoid recording the object as one
with offload data.
PR middle-end/109128
include/
* plugin-api.h (ld_plugin_claim_file_handler_v2)
(ld_plugin_register_claim_file_v2)
(LDPT_REGISTER_CLAIM_FILE_HOOK_V2): New.
(struct ld_plugin_tv): Add tv_register_claim_file_v2.
lto-plugin/
* lto-plugin.c (register_claim_file_v2): New.
(claim_file_handler_v2): New.
(claim_file_handler): Wrap claim_file_handler_v2.
(onload): Handle LDPT_REGISTER_CLAIM_FILE_HOOK_V2.
This was approved for the binutils gold linker.
2018-05-01 Sriraman Tallam <tmsriram@google.com>
* plugin-api.h: Add plugin API to get the list of wrap
symbols.
From-SVN: r259820
Gold plugins may wish to further process an input file added by a plugin. For
example, the plugin may need to assign a unique segment for sections in a
plugin-generated input file. This patch adds a plugin callback that the linker
will call when reading symbols from a new input file added after the
all_symbols_read event (i.e. an input file added by a plugin).
2017-11-10 Stephen Crane <sjc@immunant.com>
* plugin-api.h: Add plugin API for processing plugin-added
input files.
From-SVN: r254640
2016-03-03 Than McIntosh <thanm@google.com>
* plugin-api.h: Add new hooks to the plugin transfer vector to
to support querying section alignment and section size.
(ld_plugin_get_input_section_alignment): New hook.
(ld_plugin_get_input_section_size): New hook.
(ld_plugin_tag): Add LDPT_GET_INPUT_SECTION_ALIGNMENT
and LDPT_GET_INPUT_SECTION_SIZE.
(ld_plugin_tv): Add tv_get_input_section_alignment and
tv_get_input_section_size.
2016-03-03 Evgenii Stepanov <eugenis@google.com>
* plugin-api.h (enum ld_plugin_tag): Add LDPT_GET_SYMBOLS_V3.
From-SVN: r233986
http://sourceware.org/ml/binutils/2013-02/msg00136.html
for a change committed to plugin-api.h
2013-02-11 Sriraman Tallam <tmsriram@google.com>
* plugin-api.h (enum ld_plugin_level): Assign integers
explicitly for all values.
From-SVN: r195953
* plugin-api.h (ld_plugin_allow_unique_segment_for_sections):
New interface.
(ld_plugin_unique_segment_for_sections): New interface.
(LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS): New enum val.
(LDPT_UNIQUE_SEGMENT_FOR_SECTIONS): New enum val.
(tv_allow_unique_segment_for_sections): New member.
(tv_unique_segment_for_sections): New member.
From-SVN: r190654
* plugin-api.h
(ld_plugin_section): New struct.
(ld_plugin_get_section_count): New typedef.
(ld_plugin_get_section_type): New typedef.
(ld_plugin_get_section_name): New typedef.
(ld_plugin_get_section_contents): New typedef.
(ld_plugin_update_section_order): New typedef.
(ld_plugin_allow_section_ordering): New typedef.
(LDPT_GET_SECTION_COUNT): New enum value.
(LDPT_GET_SECTION_TYPE): New enum value.
(LDPT_GET_SECTION_NAME): New enum value.
(LDPT_GET_SECTION_CONTENTS): New enum value.
(LDPT_UPDATE_SECTION_ORDER): New enum value.
(LDPT_ALLOW_SECTION_ORDERING): New enum value.
(tv_get_section_count): New struct members.
(tv_get_section_type): New struct members.
(tv_get_section_name): New struct members.
(tv_get_section_contents): New struct members.
(tv_update_section_order): New struct members.
(tv_allow_section_ordering): New struct members.
From-SVN: r176260
Joseph Myers