From 3216484550610470013b7ce1c9ed272da0a74589 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada <masahiroy@kernel.org> Date: Sun, 25 Sep 2022 03:19:14 +0900 Subject: kbuild: use obj-y instead extra-y for objects placed at the head The objects placed at the head of vmlinux need special treatments: - arch/$(SRCARCH)/Makefile adds them to head-y in order to place them before other archives in the linker command line. - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of obj-y to avoid them going into built-in.a. This commit gets rid of the latter. Create vmlinux.a to collect all the objects that are unconditionally linked to vmlinux. The objects listed in head-y are moved to the head of vmlinux.a by using 'ar m'. With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y for builtin objects. There is no *.o that is directly linked to vmlinux. Drop unneeded code in scripts/clang-tools/gen_compile_commands.py. $(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested by Nathan Chancellor [1]. [1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/ Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu> --- arch/alpha/kernel/Makefile | 4 ++-- arch/arc/kernel/Makefile | 4 ++-- arch/arm/kernel/Makefile | 4 ++-- arch/arm64/kernel/Makefile | 4 ++-- arch/csky/kernel/Makefile | 4 ++-- arch/hexagon/kernel/Makefile | 3 ++- arch/ia64/kernel/Makefile | 4 ++-- arch/loongarch/kernel/Makefile | 4 ++-- arch/m68k/68000/Makefile | 2 +- arch/m68k/coldfire/Makefile | 2 +- arch/m68k/kernel/Makefile | 23 ++++++++++++----------- arch/microblaze/kernel/Makefile | 4 ++-- arch/mips/kernel/Makefile | 4 ++-- arch/nios2/kernel/Makefile | 2 +- arch/openrisc/kernel/Makefile | 4 ++-- arch/parisc/kernel/Makefile | 4 ++-- arch/powerpc/kernel/Makefile | 20 ++++++++++---------- arch/riscv/kernel/Makefile | 2 +- arch/s390/kernel/Makefile | 4 ++-- arch/sh/kernel/Makefile | 4 ++-- arch/sparc/kernel/Makefile | 3 +-- arch/x86/kernel/Makefile | 10 +++++----- arch/xtensa/kernel/Makefile | 4 ++-- 23 files changed, 62 insertions(+), 61 deletions(-) (limited to 'arch') diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile index 5a74581bf0ee..5a5b0a8b7c6a 100644 --- a/arch/alpha/kernel/Makefile +++ b/arch/alpha/kernel/Makefile @@ -3,11 +3,11 @@ # Makefile for the linux kernel. # -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds asflags-y := $(KBUILD_CFLAGS) ccflags-y := -Wno-sign-compare -obj-y := entry.o traps.o process.o osf_sys.o irq.o \ +obj-y := head.o entry.o traps.o process.o osf_sys.o irq.o \ irq_alpha.o signal.o setup.o ptrace.o time.o \ systbls.o err_common.o io.o bugs.o diff --git a/arch/arc/kernel/Makefile b/arch/arc/kernel/Makefile index 8c4fc4b54c14..0723d888ac44 100644 --- a/arch/arc/kernel/Makefile +++ b/arch/arc/kernel/Makefile @@ -3,7 +3,7 @@ # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) # -obj-y := arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o +obj-y := head.o arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o obj-$(CONFIG_ISA_ARCOMPACT) += entry-compact.o intc-compact.o obj-$(CONFIG_ISA_ARCV2) += entry-arcv2.o intc-arcv2.o @@ -31,4 +31,4 @@ else obj-y += ctx_sw_asm.o endif -extra-y := vmlinux.lds head.o +extra-y := vmlinux.lds diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 553866751e1a..8feaa3217ec5 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -89,7 +89,7 @@ obj-$(CONFIG_VDSO) += vdso.o obj-$(CONFIG_EFI) += efi.o obj-$(CONFIG_PARAVIRT) += paravirt.o -head-y := head$(MMUEXT).o +obj-y += head$(MMUEXT).o obj-$(CONFIG_DEBUG_LL) += debug.o obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_ARM_PATCH_PHYS_VIRT) += phys2virt.o @@ -109,4 +109,4 @@ obj-$(CONFIG_HAVE_ARM_SMCCC) += smccc-call.o obj-$(CONFIG_GENERIC_CPU_VULNERABILITIES) += spectre.o -extra-y := $(head-y) vmlinux.lds +extra-y := vmlinux.lds diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 1add7b01efa7..b619ff207a57 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -85,8 +85,8 @@ $(obj)/vdso-wrap.o: $(obj)/vdso/vdso.so $(obj)/vdso32-wrap.o: $(obj)/vdso32/vdso.so obj-y += probes/ -head-y := head.o -extra-y += $(head-y) vmlinux.lds +obj-y += head.o +extra-y += vmlinux.lds ifeq ($(CONFIG_DEBUG_EFI),y) AFLAGS_head.o += -DVMLINUX_PATH="\"$(realpath $(objtree)/vmlinux)\"" diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile index 6f14c924b20d..8a868316b912 100644 --- a/arch/csky/kernel/Makefile +++ b/arch/csky/kernel/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y += entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/ +obj-y += head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/ obj-y += power.o syscall.o syscall_table.o setup.o io.o obj-y += process.o cpu-probe.o ptrace.o stacktrace.o obj-y += probes/ diff --git a/arch/hexagon/kernel/Makefile b/arch/hexagon/kernel/Makefile index fae3dce32fde..e73cb321630e 100644 --- a/arch/hexagon/kernel/Makefile +++ b/arch/hexagon/kernel/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds +obj-y += head.o obj-$(CONFIG_SMP) += smp.o obj-y += setup.o irq_cpu.o traps.o syscalltab.o signal.o time.o diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile index 08d4a2ba0652..4a1fcb121dda 100644 --- a/arch/ia64/kernel/Makefile +++ b/arch/ia64/kernel/Makefile @@ -7,9 +7,9 @@ ifdef CONFIG_DYNAMIC_FTRACE CFLAGS_REMOVE_ftrace.o = -pg endif -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y := entry.o efi.o efi_stub.o gate-data.o fsys.o irq.o irq_ia64.o \ +obj-y := head.o entry.o efi.o efi_stub.o gate-data.o fsys.o irq.o irq_ia64.o \ irq_lsapic.o ivt.o pal.o patch.o process.o ptrace.o sal.o \ salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \ unwind.o mca.o mca_asm.o topology.o dma-mapping.o iosapic.o acpi.o \ diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile index e5be17009fe8..6c33b5c45573 100644 --- a/arch/loongarch/kernel/Makefile +++ b/arch/loongarch/kernel/Makefile @@ -3,9 +3,9 @@ # Makefile for the Linux/LoongArch kernel. # -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y += cpu-probe.o cacheinfo.o env.o setup.o entry.o genex.o \ +obj-y += head.o cpu-probe.o cacheinfo.o env.o setup.o entry.o genex.o \ traps.o irq.o idle.o process.o dma.o mem.o io.o reset.o switch.o \ elf.o syscall.o signal.o time.o topology.o inst.o ptrace.o vdso.o diff --git a/arch/m68k/68000/Makefile b/arch/m68k/68000/Makefile index 674541fdf5b8..279560add577 100644 --- a/arch/m68k/68000/Makefile +++ b/arch/m68k/68000/Makefile @@ -17,4 +17,4 @@ obj-$(CONFIG_DRAGEN2) += dragen2.o obj-$(CONFIG_UCSIMM) += ucsimm.o obj-$(CONFIG_UCDIMM) += ucsimm.o -extra-y := head.o +obj-y += head.o diff --git a/arch/m68k/coldfire/Makefile b/arch/m68k/coldfire/Makefile index 9419a6c1f036..c56bc0dc7f2e 100644 --- a/arch/m68k/coldfire/Makefile +++ b/arch/m68k/coldfire/Makefile @@ -45,4 +45,4 @@ obj-$(CONFIG_STMARK2) += stmark2.o obj-$(CONFIG_PCI) += pci.o obj-y += gpio.o -extra-y := head.o +obj-y += head.o diff --git a/arch/m68k/kernel/Makefile b/arch/m68k/kernel/Makefile index c0833da6a2ca..af015447dfb4 100644 --- a/arch/m68k/kernel/Makefile +++ b/arch/m68k/kernel/Makefile @@ -3,19 +3,20 @@ # Makefile for the linux kernel. # -extra-$(CONFIG_AMIGA) := head.o -extra-$(CONFIG_ATARI) := head.o -extra-$(CONFIG_MAC) := head.o -extra-$(CONFIG_APOLLO) := head.o -extra-$(CONFIG_VME) := head.o -extra-$(CONFIG_HP300) := head.o -extra-$(CONFIG_Q40) := head.o -extra-$(CONFIG_SUN3X) := head.o -extra-$(CONFIG_VIRT) := head.o -extra-$(CONFIG_SUN3) := sun3-head.o extra-y += vmlinux.lds -obj-y := entry.o irq.o module.o process.o ptrace.o +obj-$(CONFIG_AMIGA) := head.o +obj-$(CONFIG_ATARI) := head.o +obj-$(CONFIG_MAC) := head.o +obj-$(CONFIG_APOLLO) := head.o +obj-$(CONFIG_VME) := head.o +obj-$(CONFIG_HP300) := head.o +obj-$(CONFIG_Q40) := head.o +obj-$(CONFIG_SUN3X) := head.o +obj-$(CONFIG_VIRT) := head.o +obj-$(CONFIG_SUN3) := sun3-head.o + +obj-y += entry.o irq.o module.o process.o ptrace.o obj-y += setup.o signal.o sys_m68k.o syscalltable.o time.o traps.o obj-$(CONFIG_MMU_MOTOROLA) += ints.o vectors.o diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile index 15a20eb814ce..4393bee64eaf 100644 --- a/arch/microblaze/kernel/Makefile +++ b/arch/microblaze/kernel/Makefile @@ -12,9 +12,9 @@ CFLAGS_REMOVE_ftrace.o = -pg CFLAGS_REMOVE_process.o = -pg endif -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y += dma.o exceptions.o \ +obj-y += head.o dma.o exceptions.o \ hw_exception_handler.o irq.o \ process.o prom.o ptrace.o \ reset.o setup.o signal.o sys_microblaze.o timer.o traps.o unwind.o diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 7c96282bff2e..5d1addac5e28 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -3,9 +3,9 @@ # Makefile for the Linux/MIPS kernel. # -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y += branch.o cmpxchg.o elf.o entry.o genex.o idle.o irq.o \ +obj-y += head.o branch.o cmpxchg.o elf.o entry.o genex.o idle.o irq.o \ process.o prom.o ptrace.o reset.o setup.o signal.o \ syscall.o time.o topology.o traps.o unaligned.o watch.o \ vdso.o cacheinfo.o diff --git a/arch/nios2/kernel/Makefile b/arch/nios2/kernel/Makefile index 0b645e1e3158..78a913181fa1 100644 --- a/arch/nios2/kernel/Makefile +++ b/arch/nios2/kernel/Makefile @@ -3,9 +3,9 @@ # Makefile for the nios2 linux kernel. # -extra-y += head.o extra-y += vmlinux.lds +obj-y += head.o obj-y += cpuinfo.o obj-y += entry.o obj-y += insnemu.o diff --git a/arch/openrisc/kernel/Makefile b/arch/openrisc/kernel/Makefile index 2d172e79f58d..79129161f3e0 100644 --- a/arch/openrisc/kernel/Makefile +++ b/arch/openrisc/kernel/Makefile @@ -3,9 +3,9 @@ # Makefile for the linux kernel. # -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y := setup.o or32_ksyms.o process.o dma.o \ +obj-y := head.o setup.o or32_ksyms.o process.o dma.o \ traps.o time.o irq.o entry.o ptrace.o signal.o \ sys_call_table.o unwinder.o diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile index d0bfac89a842..3d138c9cf9ce 100644 --- a/arch/parisc/kernel/Makefile +++ b/arch/parisc/kernel/Makefile @@ -3,9 +3,9 @@ # Makefile for arch/parisc/kernel # -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y := cache.o pacache.o setup.o pdt.o traps.o time.o irq.o \ +obj-y := head.o cache.o pacache.o setup.o pdt.o traps.o time.o irq.o \ pa7300lc.o syscall.o entry.o sys_parisc.o firmware.o \ ptrace.o hardware.o inventory.o drivers.o alternative.o \ signal.o hpmc.o real2.o parisc_ksyms.o unaligned.o \ diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 06d2d1f78f71..ad3decb9f20b 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -118,12 +118,12 @@ obj-$(CONFIG_PPC_FSL_BOOK3E) += cpu_setup_fsl_booke.o obj-$(CONFIG_PPC_DOORBELL) += dbell.o obj-$(CONFIG_JUMP_LABEL) += jump_label.o -extra-$(CONFIG_PPC64) := head_64.o -extra-$(CONFIG_PPC_BOOK3S_32) := head_book3s_32.o -extra-$(CONFIG_40x) := head_40x.o -extra-$(CONFIG_44x) := head_44x.o -extra-$(CONFIG_FSL_BOOKE) := head_fsl_booke.o -extra-$(CONFIG_PPC_8xx) := head_8xx.o +obj-$(CONFIG_PPC64) += head_64.o +obj-$(CONFIG_PPC_BOOK3S_32) += head_book3s_32.o +obj-$(CONFIG_40x) += head_40x.o +obj-$(CONFIG_44x) += head_44x.o +obj-$(CONFIG_FSL_BOOKE) += head_fsl_booke.o +obj-$(CONFIG_PPC_8xx) += head_8xx.o extra-y += vmlinux.lds obj-$(CONFIG_RELOCATABLE) += reloc_$(BITS).o @@ -198,10 +198,10 @@ KCOV_INSTRUMENT_paca.o := n CFLAGS_setup_64.o += -fno-stack-protector CFLAGS_paca.o += -fno-stack-protector -extra-$(CONFIG_PPC_FPU) += fpu.o -extra-$(CONFIG_ALTIVEC) += vector.o -extra-$(CONFIG_PPC64) += entry_64.o -extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init.o +obj-$(CONFIG_PPC_FPU) += fpu.o +obj-$(CONFIG_ALTIVEC) += vector.o +obj-$(CONFIG_PPC64) += entry_64.o +obj-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init.o extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init_check diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile index 33bb60a354cd..db6e4b1294ba 100644 --- a/arch/riscv/kernel/Makefile +++ b/arch/riscv/kernel/Makefile @@ -28,9 +28,9 @@ KASAN_SANITIZE_cpufeature.o := n endif endif -extra-y += head.o extra-y += vmlinux.lds +obj-y += head.o obj-y += soc.o obj-$(CONFIG_RISCV_ALTERNATIVE) += alternative.o obj-y += cpu.o diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 3cbfa9fddd9a..7ce00816b8df 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -33,7 +33,7 @@ CFLAGS_stacktrace.o += -fno-optimize-sibling-calls CFLAGS_dumpstack.o += -fno-optimize-sibling-calls CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls -obj-y := traps.o time.o process.o earlypgm.o early.o setup.o idle.o vtime.o +obj-y := head64.o traps.o time.o process.o earlypgm.o early.o setup.o idle.o vtime.o obj-y += processor.o syscall.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o cpufeature.o obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o @@ -42,7 +42,7 @@ obj-y += entry.o reipl.o relocate_kernel.o kdebugfs.o alternative.o obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o unwind_bc.o obj-y += smp.o text_amode31.o stacktrace.o -extra-y += head64.o vmlinux.lds +extra-y += vmlinux.lds obj-$(CONFIG_SYSFS) += nospec-sysfs.o CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE) diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile index aa0fbc9202b1..69cd9ac4b2ab 100644 --- a/arch/sh/kernel/Makefile +++ b/arch/sh/kernel/Makefile @@ -3,7 +3,7 @@ # Makefile for the Linux/SuperH kernel. # -extra-y := head_32.o vmlinux.lds +extra-y := vmlinux.lds ifdef CONFIG_FUNCTION_TRACER # Do not profile debug and lowlevel utilities @@ -12,7 +12,7 @@ endif CFLAGS_REMOVE_return_address.o = -pg -obj-y := debugtraps.o dumpstack.o \ +obj-y := head_32.o debugtraps.o dumpstack.o \ idle.o io.o irq.o irq_32.o kdebugfs.o \ machvec.o nmi_debug.o process.o \ process_32.o ptrace.o ptrace_32.o \ diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile index d3a0e072ebe8..b328e4a0bd57 100644 --- a/arch/sparc/kernel/Makefile +++ b/arch/sparc/kernel/Makefile @@ -7,8 +7,6 @@ asflags-y := -ansi ccflags-y := -Werror -extra-y := head_$(BITS).o - # Undefine sparc when processing vmlinux.lds - it is used # And teach CPP we are doing $(BITS) builds (for this case) CPPFLAGS_vmlinux.lds := -Usparc -m$(BITS) @@ -22,6 +20,7 @@ CFLAGS_REMOVE_perf_event.o := -pg CFLAGS_REMOVE_pcr.o := -pg endif +obj-y := head_$(BITS).o obj-$(CONFIG_SPARC64) += urtt_fill.o obj-$(CONFIG_SPARC32) += entry.o wof.o wuf.o obj-$(CONFIG_SPARC32) += etrap_32.o diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index a20a5ebfacd7..956e50ca06e0 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -3,10 +3,6 @@ # Makefile for the linux kernel. # -extra-y := head_$(BITS).o -extra-y += head$(BITS).o -extra-y += ebda.o -extra-y += platform-quirks.o extra-y += vmlinux.lds CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE) @@ -42,7 +38,11 @@ KCOV_INSTRUMENT := n CFLAGS_irq.o := -I $(srctree)/$(src)/../include/asm/trace -obj-y := process_$(BITS).o signal.o +obj-y += head_$(BITS).o +obj-y += head$(BITS).o +obj-y += ebda.o +obj-y += platform-quirks.o +obj-y += process_$(BITS).o signal.o obj-$(CONFIG_COMPAT) += signal_compat.o obj-y += traps.o idt.o irq.o irq_$(BITS).o dumpstack_$(BITS).o obj-y += time.o ioport.o dumpstack.o nmi.o diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile index 897c1c741058..f28b8e3d717e 100644 --- a/arch/xtensa/kernel/Makefile +++ b/arch/xtensa/kernel/Makefile @@ -3,9 +3,9 @@ # Makefile for the Linux/Xtensa kernel. # -extra-y := head.o vmlinux.lds +extra-y := vmlinux.lds -obj-y := align.o coprocessor.o entry.o irq.o platform.o process.o \ +obj-y := head.o align.o coprocessor.o entry.o irq.o platform.o process.o \ ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \ vectors.o -- cgit v1.2.3