From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id DDB3F3858D3C; Fri, 8 Apr 2022 12:29:25 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DDB3F3858D3C From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/105169] Compiling C++ code with -fpatchable-function-entry=16,14 results in references to discarded sections Date: Fri, 08 Apr 2022 12:29:25 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 11.2.1 X-Bugzilla-Keywords: link-failure X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Apr 2022 12:29:26 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105169 --- Comment #11 from Richard Biener --- (In reply to Richard Biener from comment #10) > Btw, a good example might be how we handle .vtable_map_vars for VTV which > uses handle_vtv_comdat_section instead of switch_to_section. It might ha= ve > more specialities but then it should serve as a recipie how to handle > non-ELF. So sth like the following would do the trick for ELF. But maybe better abstract a switch_to_comdat_section and re-use that from the vtv handler and this place to avoid touching in_section directly. diff --git a/gcc/targhooks.cc b/gcc/targhooks.cc index e22bc66a6c8..632c9486ccb 100644 --- a/gcc/targhooks.cc +++ b/gcc/targhooks.cc @@ -1995,8 +1995,13 @@ default_print_patchable_function_entry_1 (FILE *file, patch_area_number++; ASM_GENERATE_INTERNAL_LABEL (buf, "LPFE", patch_area_number); - switch_to_section (get_section ("__patchable_function_entries", - flags, current_function_decl)); + section *sect =3D get_section ("__patchable_function_entries", + flags, current_function_decl); + targetm.asm_out.named_section (sect->named.name, + sect->named.common.flags + | SECTION_LINKONCE, + current_function_decl); + in_section =3D sect; assemble_align (POINTER_SIZE); fputs (asm_op, file); assemble_name_raw (file, buf);=