From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:40560 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729195AbeKVFpk (ORCPT ); Thu, 22 Nov 2018 00:45:40 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Vin=C3=ADcius=20Tinti?= , Behan Webster , Matthias Kaehlcke , Masahiro Yamada , Nick Desaulniers Subject: [PATCH 4.9 18/59] kbuild: Add support to generate LLVM assembly files Date: Wed, 21 Nov 2018 20:06:33 +0100 Message-Id: <20181121183508.966337846@linuxfoundation.org> In-Reply-To: <20181121183508.262873520@linuxfoundation.org> References: <20181121183508.262873520@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vinícius Tinti commit 433db3e260bc8134d4a46ddf20b3668937e12556 upstream. Add rules to kbuild in order to generate LLVM assembly files with the .ll extension when using clang. # from c code make CC=clang kernel/pid.ll Signed-off-by: Vinícius Tinti Signed-off-by: Behan Webster Signed-off-by: Matthias Kaehlcke Signed-off-by: Masahiro Yamada Signed-off-by: Nick Desaulniers Signed-off-by: Greg Kroah-Hartman --- .gitignore | 1 + Makefile | 5 +++++ scripts/Makefile.build | 8 ++++++++ 3 files changed, 14 insertions(+) --- a/.gitignore +++ b/.gitignore @@ -33,6 +33,7 @@ *.lzo *.patch *.gcno +*.ll modules.builtin Module.symvers *.dwo --- a/Makefile +++ b/Makefile @@ -1390,6 +1390,8 @@ help: @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' @echo ' dir/ - Build all files in dir and below' @echo ' dir/file.[ois] - Build specified target only' + @echo ' dir/file.ll - Build the LLVM assembly file' + @echo ' (requires compiler support for LLVM assembly generation)' @echo ' dir/file.lst - Build specified mixed source/assembly target only' @echo ' (requires a recent binutils and recent build (System.map))' @echo ' dir/file.ko - Build module including final link' @@ -1574,6 +1576,7 @@ clean: $(clean-dirs) -o -name '*.symtypes' -o -name 'modules.order' \ -o -name modules.builtin -o -name '.tmp_*.o.*' \ -o -name '*.c.[012]*.*' \ + -o -name '*.ll' \ -o -name '*.gcno' \) -type f -print | xargs rm -f # Generate tags for editors @@ -1677,6 +1680,8 @@ endif $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) %.symtypes: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.ll: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) # Modules /: prepare scripts FORCE --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -176,6 +176,14 @@ cmd_cc_symtypes_c = $(obj)/%.symtypes : $(src)/%.c FORCE $(call cmd,cc_symtypes_c) +# LLVM assembly +# Generate .ll files from .c +quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ + cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -o $@ $< + +$(obj)/%.ll: $(src)/%.c FORCE + $(call if_changed_dep,cc_ll_c) + # C (.c) files # The C file is compiled and updated dependency information is generated. # (See cmd_cc_o_c + relevant part of rule_cc_o_c)