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Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kEBq1-0003dq-Nj; Fri, 04 Sep 2020 13:33:09 +0000 Received: from conuserg-11.nifty.com ([210.131.2.78]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kEBpv-0003bs-SE; Fri, 04 Sep 2020 13:33:05 +0000 Received: from oscar.flets-west.jp (softbank126090211135.bbtec.net [126.90.211.135]) (authenticated) by conuserg-11.nifty.com with ESMTP id 084DVRDU018232; Fri, 4 Sep 2020 22:31:27 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-11.nifty.com 084DVRDU018232 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1599226289; bh=KhuHwbVOnaHwR/5Po5h9g9JE1ia7wMs0KH0UYL7hjd4=; h=From:To:Cc:Subject:Date:From; b=TnOeU5OotpjJG/3yzqnn14+3m1xxcfFCaY5s9pZCclr0d/QAjBYBzlWdez9P01L6m bxQpfit6PIhtd4+auw0orDB+byH8dvLG+zNYn6xwzn2Ye/3/RHWKQ+5s7Hg4maBaap gK86ISfHlAxBXIai9JqpqsDg7NdAcIeA+saiXsWlLTsAjT3CWUUp/g79sm22vLxDV0 FlOBRqtz3uBSf8G43FISiKpdJB9AW0nIzIZi695E2UoAvhFmGOFpgiXG3cygRaved8 C+No/iOvGQcDCp9jUXBY73wpFGore0tmzO7ESnlkKZthVOjSxSTPA5xkes2Owv/2M9 G7KJpFVICFZIQ== X-Nifty-SrcIP: [126.90.211.135] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Subject: [PATCH] kbuild: preprocess module linker script Date: Fri, 4 Sep 2020 22:31:21 +0900 Message-Id: <20200904133122.133071-1-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200904_093304_327759_9A6A1383 X-CRM114-Status: GOOD ( 21.81 ) X-Spam-Score: 1.0 (+) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (1.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [210.131.2.78 listed in list.dnswl.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-ia64@vger.kernel.org, Peter Zijlstra , Catalin Marinas , Paul Mackerras , linux-riscv@lists.infradead.org, Will Deacon , Ard Biesheuvel , Anton Ivanov , linux-arch@vger.kernel.org, Mauro Carvalho Chehab , Richard Weinberger , Masahiro Yamada , Russell King , Ingo Molnar , Geert Uytterhoeven , Benjamin Herrenschmidt , Fenghua Yu , Albert Ou , Kees Cook , Arnd Bergmann , Jeff Dike , Jessica Yu , linux-um@lists.infradead.org, linux-m68k@lists.linux-m68k.org, Tony Luck , Paul Walmsley , linux-arm-kernel@lists.infradead.org, Michal Marek , linux-kernel@vger.kernel.org, Palmer Dabbelt , Michael Ellerman , linuxppc-dev@lists.ozlabs.org Sender: "linux-um" Errors-To: linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org There was a request to preprocess the module linker script like we do for the vmlinux one (https://lkml.org/lkml/2020/8/21/512). The difference between vmlinux.lds and module.lds is that the latter is needed for external module builds, thus must be cleaned up by 'make mrproper' instead of 'make clean' (also, it must be created by 'make modules_prepare'). You cannot put it in arch/*/kernel/ because 'make clean' descends into it. I moved arch/*/kernel/module.lds to arch/*/include/asm/module.lds.h, which is included from scripts/module.lds.S. scripts/module.lds is fine because 'make clean' keeps all the build artifacts under scripts/. You can add arch-specific sections in . Signed-off-by: Masahiro Yamada Tested-by: Jessica Yu Acked-by: Will Deacon --- Makefile | 1 - arch/arm/Makefile | 4 ---- .../{kernel/module.lds => include/asm/module.lds.h} | 2 ++ arch/arm64/Makefile | 4 ---- .../{kernel/module.lds => include/asm/module.lds.h} | 2 ++ arch/ia64/Makefile | 1 - arch/ia64/{module.lds => include/asm/module.lds.h} | 0 arch/m68k/Makefile | 1 - .../{kernel/module.lds => include/asm/module.lds.h} | 0 arch/powerpc/Makefile | 1 - .../{kernel/module.lds => include/asm/module.lds.h} | 0 arch/riscv/Makefile | 3 --- .../{kernel/module.lds => include/asm/module.lds.h} | 3 ++- arch/um/include/asm/Kbuild | 1 + include/asm-generic/Kbuild | 1 + include/asm-generic/module.lds.h | 10 ++++++++++ scripts/.gitignore | 1 + scripts/Makefile | 2 ++ scripts/Makefile.modfinal | 5 ++--- scripts/{module-common.lds => module.lds.S} | 3 +++ scripts/package/builddeb | 2 +- 21 files changed, 27 insertions(+), 20 deletions(-) rename arch/arm/{kernel/module.lds => include/asm/module.lds.h} (72%) rename arch/arm64/{kernel/module.lds => include/asm/module.lds.h} (76%) rename arch/ia64/{module.lds => include/asm/module.lds.h} (100%) rename arch/m68k/{kernel/module.lds => include/asm/module.lds.h} (100%) rename arch/powerpc/{kernel/module.lds => include/asm/module.lds.h} (100%) rename arch/riscv/{kernel/module.lds => include/asm/module.lds.h} (84%) create mode 100644 include/asm-generic/module.lds.h rename scripts/{module-common.lds => module.lds.S} (93%) diff --git a/Makefile b/Makefile index 9cac6fde3479..3d9b56c6b47e 100644 --- a/Makefile +++ b/Makefile @@ -506,7 +506,6 @@ KBUILD_CFLAGS_KERNEL := KBUILD_AFLAGS_MODULE := -DMODULE KBUILD_CFLAGS_MODULE := -DMODULE KBUILD_LDFLAGS_MODULE := -export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds KBUILD_LDFLAGS := CLANG_FLAGS := diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 4e877354515f..a0cb15de9677 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -16,10 +16,6 @@ LDFLAGS_vmlinux += --be8 KBUILD_LDFLAGS_MODULE += --be8 endif -ifeq ($(CONFIG_ARM_MODULE_PLTS),y) -KBUILD_LDS_MODULE += $(srctree)/arch/arm/kernel/module.lds -endif - GZFLAGS :=-9 #KBUILD_CFLAGS +=-pipe diff --git a/arch/arm/kernel/module.lds b/arch/arm/include/asm/module.lds.h similarity index 72% rename from arch/arm/kernel/module.lds rename to arch/arm/include/asm/module.lds.h index 79cb6af565e5..0e7cb4e314b4 100644 --- a/arch/arm/kernel/module.lds +++ b/arch/arm/include/asm/module.lds.h @@ -1,5 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 */ +#ifdef CONFIG_ARM_MODULE_PLTS SECTIONS { .plt : { BYTE(0) } .init.plt : { BYTE(0) } } +#endif diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 55bc8546d9c7..232547ec07d8 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -115,10 +115,6 @@ endif CHECKFLAGS += -D__aarch64__ -ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) -KBUILD_LDS_MODULE += $(srctree)/arch/arm64/kernel/module.lds -endif - ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y) KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY CC_FLAGS_FTRACE := -fpatchable-function-entry=2 diff --git a/arch/arm64/kernel/module.lds b/arch/arm64/include/asm/module.lds.h similarity index 76% rename from arch/arm64/kernel/module.lds rename to arch/arm64/include/asm/module.lds.h index 22e36a21c113..691f15af788e 100644 --- a/arch/arm64/kernel/module.lds +++ b/arch/arm64/include/asm/module.lds.h @@ -1,5 +1,7 @@ +#ifdef CONFIG_ARM64_MODULE_PLTS SECTIONS { .plt (NOLOAD) : { BYTE(0) } .init.plt (NOLOAD) : { BYTE(0) } .text.ftrace_trampoline (NOLOAD) : { BYTE(0) } } +#endif diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile index 2876a7df1b0a..703b1c4f6d12 100644 --- a/arch/ia64/Makefile +++ b/arch/ia64/Makefile @@ -20,7 +20,6 @@ CHECKFLAGS += -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__ OBJCOPYFLAGS := --strip-all LDFLAGS_vmlinux := -static -KBUILD_LDS_MODULE += $(srctree)/arch/ia64/module.lds KBUILD_AFLAGS_KERNEL := -mconstant-gp EXTRA := diff --git a/arch/ia64/module.lds b/arch/ia64/include/asm/module.lds.h similarity index 100% rename from arch/ia64/module.lds rename to arch/ia64/include/asm/module.lds.h diff --git a/arch/m68k/Makefile b/arch/m68k/Makefile index 4438ffb4bbe1..ea14f2046fb4 100644 --- a/arch/m68k/Makefile +++ b/arch/m68k/Makefile @@ -75,7 +75,6 @@ KBUILD_CPPFLAGS += -D__uClinux__ endif KBUILD_LDFLAGS := -m m68kelf -KBUILD_LDS_MODULE += $(srctree)/arch/m68k/kernel/module.lds ifdef CONFIG_SUN3 LDFLAGS_vmlinux = -N diff --git a/arch/m68k/kernel/module.lds b/arch/m68k/include/asm/module.lds.h similarity index 100% rename from arch/m68k/kernel/module.lds rename to arch/m68k/include/asm/module.lds.h diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index 3e8da9cf2eb9..8935658fcd06 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -65,7 +65,6 @@ UTS_MACHINE := $(subst $(space),,$(machine-y)) ifdef CONFIG_PPC32 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o else -KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds ifeq ($(call ld-ifversion, -ge, 225000000, y),y) # Have the linker provide sfpr if possible. # There is a corresponding test in arch/powerpc/lib/Makefile diff --git a/arch/powerpc/kernel/module.lds b/arch/powerpc/include/asm/module.lds.h similarity index 100% rename from arch/powerpc/kernel/module.lds rename to arch/powerpc/include/asm/module.lds.h diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index fb6e37db836d..8edaa8bd86d6 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -53,9 +53,6 @@ endif ifeq ($(CONFIG_CMODEL_MEDANY),y) KBUILD_CFLAGS += -mcmodel=medany endif -ifeq ($(CONFIG_MODULE_SECTIONS),y) - KBUILD_LDS_MODULE += $(srctree)/arch/riscv/kernel/module.lds -endif ifeq ($(CONFIG_PERF_EVENTS),y) KBUILD_CFLAGS += -fno-omit-frame-pointer endif diff --git a/arch/riscv/kernel/module.lds b/arch/riscv/include/asm/module.lds.h similarity index 84% rename from arch/riscv/kernel/module.lds rename to arch/riscv/include/asm/module.lds.h index 295ecfb341a2..4254ff2ff049 100644 --- a/arch/riscv/kernel/module.lds +++ b/arch/riscv/include/asm/module.lds.h @@ -1,8 +1,9 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (C) 2017 Andes Technology Corporation */ - +#ifdef CONFIG_MODULE_SECTIONS SECTIONS { .plt (NOLOAD) : { BYTE(0) } .got (NOLOAD) : { BYTE(0) } .got.plt (NOLOAD) : { BYTE(0) } } +#endif diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild index 8d435f8a6dec..1c63b260ecc4 100644 --- a/arch/um/include/asm/Kbuild +++ b/arch/um/include/asm/Kbuild @@ -16,6 +16,7 @@ generic-y += kdebug.h generic-y += mcs_spinlock.h generic-y += mm-arch-hooks.h generic-y += mmiowb.h +generic-y += module.lds.h generic-y += param.h generic-y += pci.h generic-y += percpu.h diff --git a/include/asm-generic/Kbuild b/include/asm-generic/Kbuild index 74b0612601dd..7cd4e627e00e 100644 --- a/include/asm-generic/Kbuild +++ b/include/asm-generic/Kbuild @@ -40,6 +40,7 @@ mandatory-y += mmiowb.h mandatory-y += mmu.h mandatory-y += mmu_context.h mandatory-y += module.h +mandatory-y += module.lds.h mandatory-y += msi.h mandatory-y += pci.h mandatory-y += percpu.h diff --git a/include/asm-generic/module.lds.h b/include/asm-generic/module.lds.h new file mode 100644 index 000000000000..f210d5c1b78b --- /dev/null +++ b/include/asm-generic/module.lds.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef __ASM_GENERIC_MODULE_LDS_H +#define __ASM_GENERIC_MODULE_LDS_H + +/* + * can specify arch-specific sections for linking modules. + * Empty for the asm-generic header. + */ + +#endif /* __ASM_GENERIC_MODULE_LDS_H */ diff --git a/scripts/.gitignore b/scripts/.gitignore index 0d1c8e217cd7..a6c11316c969 100644 --- a/scripts/.gitignore +++ b/scripts/.gitignore @@ -8,3 +8,4 @@ asn1_compiler extract-cert sign-file insert-sys-cert +/module.lds diff --git a/scripts/Makefile b/scripts/Makefile index bc018e4b733e..a5058bfdd0f6 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -29,6 +29,8 @@ endif # The following programs are only built on demand hostprogs += unifdef +always-$(CONFIG_MODULES) += module.lds + subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins subdir-$(CONFIG_MODVERSIONS) += genksyms subdir-$(CONFIG_SECURITY_SELINUX) += selinux diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal index 411c1e600e7d..ae01baf96f4e 100644 --- a/scripts/Makefile.modfinal +++ b/scripts/Makefile.modfinal @@ -33,11 +33,10 @@ quiet_cmd_ld_ko_o = LD [M] $@ cmd_ld_ko_o = \ $(LD) -r $(KBUILD_LDFLAGS) \ $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ - $(addprefix -T , $(KBUILD_LDS_MODULE)) \ - -o $@ $(filter %.o, $^); \ + -T scripts/module.lds -o $@ $(filter %.o, $^); \ $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) -$(modules): %.ko: %.o %.mod.o $(KBUILD_LDS_MODULE) FORCE +$(modules): %.ko: %.o %.mod.o scripts/module.lds FORCE +$(call if_changed,ld_ko_o) targets += $(modules) $(modules:.ko=.mod.o) diff --git a/scripts/module-common.lds b/scripts/module.lds.S similarity index 93% rename from scripts/module-common.lds rename to scripts/module.lds.S index d61b9e8678e8..69b9b71a6a47 100644 --- a/scripts/module-common.lds +++ b/scripts/module.lds.S @@ -24,3 +24,6 @@ SECTIONS { __jump_table 0 : ALIGN(8) { KEEP(*(__jump_table)) } } + +/* bring in arch-specific sections */ +#include diff --git a/scripts/package/builddeb b/scripts/package/builddeb index 6df3c9f8b2da..44f212e37935 100755 --- a/scripts/package/builddeb +++ b/scripts/package/builddeb @@ -55,7 +55,7 @@ deploy_kernel_headers () { cd $srctree find . arch/$SRCARCH -maxdepth 1 -name Makefile\* find include scripts -type f -o -type l - find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform + find arch/$SRCARCH -name Kbuild.platforms -o -name Platform find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f ) > debian/hdrsrcfiles