c49d51fa81
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. |
||
|---|---|---|
| .. | ||
| aclocal.m4 | ||
| ChangeLog | ||
| config.h.in | ||
| configure | ||
| configure.ac | ||
| lto-plugin.c | ||
| lto-plugin.map | ||
| Makefile.am | ||
| Makefile.in | ||