On Sun, 25 Sep 2022 03:19:14 +0900 Masahiro Yamada wrote: > 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@xxxxxxxxxx> > --- Reviewed-by: Nicolas Schier <nicolas@xxxxxxxxx> > Changes in v3: > - Fix build error for m68k > - Fix the bug for llvm-ar <= 14 > > Documentation/kbuild/makefiles.rst | 18 +--------------- > Makefile | 23 ++++++++++++++++----- > 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 ++-- > scripts/Makefile.modpost | 5 ++--- > scripts/Makefile.vmlinux_o | 6 +++--- > scripts/clang-tools/gen_compile_commands.py | 19 +---------------- > scripts/link-vmlinux.sh | 10 ++++----- > 29 files changed, 91 insertions(+), 113 deletions(-) > > diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst > index ee7e3ea1fbe1..5a6a8426cc97 100644 > --- a/Documentation/kbuild/makefiles.rst > +++ b/Documentation/kbuild/makefiles.rst > @@ -340,19 +340,7 @@ more details, with real examples. > > Examples are: > > - 1) head objects > - > - Some objects must be placed at the head of vmlinux. They are > - directly linked to vmlinux without going through built-in.a > - A typical use-case is an object that contains the entry point. > - > - arch/$(SRCARCH)/Makefile should specify such objects as head-y. > - > - Discussion: > - Given that we can control the section order in the linker script, > - why do we need head-y? > - > - 2) vmlinux linker script > + 1) vmlinux linker script > > The linker script for vmlinux is located at > arch/$(SRCARCH)/kernel/vmlinux.lds > @@ -360,10 +348,6 @@ more details, with real examples. > Example:: > > # arch/x86/kernel/Makefile > - extra-y := head_$(BITS).o > - extra-y += head$(BITS).o > - extra-y += ebda.o > - extra-y += platform-quirks.o > extra-y += vmlinux.lds > > $(extra-y) should only contain targets needed for vmlinux. > diff --git a/Makefile b/Makefile > index cf9d7b1d8c14..a8c19f92ac9e 100644 > --- a/Makefile > +++ b/Makefile > @@ -645,6 +645,8 @@ else > __all: modules > endif > > +targets := > + > # Decide whether to build built-in, modular, or both. > # Normally, just do built-in. > > @@ -1107,7 +1109,7 @@ export ARCH_LIB := $(filter %/, $(libs-y)) > export ARCH_DRIVERS := $(drivers-y) $(drivers-m) > # Externally visible symbols (used by link-vmlinux.sh) > > -KBUILD_VMLINUX_OBJS := $(head-y) ./built-in.a > +KBUILD_VMLINUX_OBJS := ./built-in.a > ifdef CONFIG_MODULES > KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) > KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) > @@ -1115,7 +1117,7 @@ else > KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) > endif > > -export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS > +export KBUILD_VMLINUX_LIBS > export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds > > vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) > @@ -1142,7 +1144,18 @@ quiet_cmd_autoksyms_h = GEN $@ > $(autoksyms_h): > $(call cmd,autoksyms_h) > > -vmlinux.o: autoksyms_recursive $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE > +# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14 > +quiet_cmd_ar_vmlinux.a = AR $@ > + cmd_ar_vmlinux.a = \ > + rm -f $@; \ > + $(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \ > + $(AR) mPiT $$($(AR) t $@ | head -n1) $@ $(head-y) > + > +targets += vmlinux.a > +vmlinux.a: $(KBUILD_VMLINUX_OBJS) FORCE > + $(call if_changed,ar_vmlinux.a) > + > +vmlinux.o: autoksyms_recursive vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE > $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o > > ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) > @@ -1155,7 +1168,7 @@ cmd_link-vmlinux = \ > vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) modpost FORCE > +$(call if_changed_dep,link-vmlinux) > > -targets := vmlinux > +targets += vmlinux > > # The actual objects are generated when descending, > # make sure no implicit rule kicks in > @@ -1880,7 +1893,7 @@ quiet_cmd_gen_compile_commands = GEN $@ > cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) > > $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ > - $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ > + $(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \ > $(if $(CONFIG_MODULES), $(MODORDER)) FORCE > $(call if_changed,gen_compile_commands) > > 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 > > diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost > index 2daf760eeb25..ceb1d78140e7 100644 > --- a/scripts/Makefile.modpost > +++ b/scripts/Makefile.modpost > @@ -70,13 +70,12 @@ quiet_cmd_vmlinux_objs = GEN $@ > for f in $(real-prereqs); do \ > case $${f} in \ > *libgcc.a) ;; \ > - *.a) $(AR) t $${f} ;; \ > - *) echo $${f} ;; \ > + *) $(AR) t $${f} ;; \ > esac \ > done > $@ > > targets += .vmlinux.objs > -.vmlinux.objs: $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE > +.vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE > $(call if_changed,vmlinux_objs) > > vmlinux.o-if-present := $(wildcard vmlinux.o) > diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o > index 84019814f33f..81a4e0484457 100644 > --- a/scripts/Makefile.vmlinux_o > +++ b/scripts/Makefile.vmlinux_o > @@ -18,7 +18,7 @@ quiet_cmd_gen_initcalls_lds = GEN $@ > $(PERL) $(real-prereqs) > $@ > > .tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \ > - $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE > + vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE > $(call if_changed,gen_initcalls_lds) > > targets := .tmp_initcalls.lds > @@ -55,7 +55,7 @@ quiet_cmd_ld_vmlinux.o = LD $@ > cmd_ld_vmlinux.o = \ > $(LD) ${KBUILD_LDFLAGS} -r -o $@ \ > $(addprefix -T , $(initcalls-lds)) \ > - --whole-archive $(KBUILD_VMLINUX_OBJS) --no-whole-archive \ > + --whole-archive vmlinux.a --no-whole-archive \ > --start-group $(KBUILD_VMLINUX_LIBS) --end-group \ > $(cmd_objtool) > > @@ -64,7 +64,7 @@ define rule_ld_vmlinux.o > $(call cmd,gen_objtooldep) > endef > > -vmlinux.o: $(initcalls-lds) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE > +vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE > $(call if_changed_rule,ld_vmlinux.o) > > targets += vmlinux.o > diff --git a/scripts/clang-tools/gen_compile_commands.py b/scripts/clang-tools/gen_compile_commands.py > index 47da25b3ba7d..d800b2c0af97 100755 > --- a/scripts/clang-tools/gen_compile_commands.py > +++ b/scripts/clang-tools/gen_compile_commands.py > @@ -109,20 +109,6 @@ def to_cmdfile(path): > return os.path.join(dir, '.' + base + '.cmd') > > > -def cmdfiles_for_o(obj): > - """Generate the iterator of .cmd files associated with the object > - > - Yield the .cmd file used to build the given object > - > - Args: > - obj: The object path > - > - Yields: > - The path to .cmd file > - """ > - yield to_cmdfile(obj) > - > - > def cmdfiles_for_a(archive, ar): > """Generate the iterator of .cmd files associated with the archive. > > @@ -211,13 +197,10 @@ def main(): > for path in paths: > # If 'path' is a directory, handle all .cmd files under it. > # Otherwise, handle .cmd files associated with the file. > - # Most of built-in objects are linked via archives (built-in.a or lib.a) > - # but some objects are linked to vmlinux directly. > + # built-in objects are linked via vmlinux.a > # Modules are listed in modules.order. > if os.path.isdir(path): > cmdfiles = cmdfiles_in_dir(path) > - elif path.endswith('.o'): > - cmdfiles = cmdfiles_for_o(path) > elif path.endswith('.a'): > cmdfiles = cmdfiles_for_a(path, ar) > elif path.endswith('modules.order'): > diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh > index 6a197d8a88ac..23ac13fd9d89 100755 > --- a/scripts/link-vmlinux.sh > +++ b/scripts/link-vmlinux.sh > @@ -3,17 +3,15 @@ > # > # link vmlinux > # > -# vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_OBJS) and > -# $(KBUILD_VMLINUX_LIBS). Most are built-in.a files from top-level directories > -# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. > +# vmlinux is linked from the objects in vmlinux.a and $(KBUILD_VMLINUX_LIBS). > +# vmlinux.a contains objects that are linked unconditionally. > # $(KBUILD_VMLINUX_LIBS) are archives which are linked conditionally > # (not within --whole-archive), and do not require symbol indexes added. > # > # vmlinux > # ^ > # | > -# +--< $(KBUILD_VMLINUX_OBJS) > -# | +--< init/built-in.a drivers/built-in.a mm/built-in.a + more > +# +--< vmlinux.a > # | > # +--< $(KBUILD_VMLINUX_LIBS) > # | +--< lib/lib.a + more > @@ -67,7 +65,7 @@ vmlinux_link() > objs=vmlinux.o > libs= > else > - objs="${KBUILD_VMLINUX_OBJS}" > + objs=vmlinux.a > libs="${KBUILD_VMLINUX_LIBS}" > fi > > -- > 2.34.1 -- epost|xmpp: nicolas@xxxxxxxxx irc://oftc.net/nsc ↳ gpg: 18ed 52db e34f 860e e9fb c82b 7d97 0932 55a0 ce7f -- frykten for herren er opphav til kunnskap --
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