mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-21 01:54:51 +08:00
bce74491c3
vgettimeofday.o is unnecessarily rebuilt. Adding it to 'targets' is not
enough to fix the issue. Kbuild is correctly rebuilding it because the
command line is changed.
PowerPC builds each vdso directory twice; first in vdso_prepare to
generate vdso{32,64}-offsets.h, second as part of the ordinary build
process to embed vdso{32,64}.so.dbg into the kernel.
The problem shows up when CONFIG_PPC_WERROR=y due to the following line
in arch/powerpc/Kbuild:
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
In the preparation stage, Kbuild directly visits the vdso directories,
hence it does not inherit subdir-ccflags-y. In the second descend,
Kbuild adds -Werror, which results in the command line flipping
with/without -Werror.
It implies a potential danger; if a more critical flag that would impact
the resulted vdso, the offsets recorded in the headers might be different
from real offsets in the embedded vdso images.
Removing the unneeded second descend solves the problem.
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/linuxppc-dev/87tuslxhry.fsf@mpe.ellerman.id.au/
Link: https://lore.kernel.org/r/20201223171142.707053-1-masahiroy@kernel.org
194 lines
6.2 KiB
Makefile
194 lines
6.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# Makefile for the linux kernel.
|
|
#
|
|
|
|
ifdef CONFIG_PPC64
|
|
CFLAGS_prom_init.o += $(NO_MINIMAL_TOC)
|
|
endif
|
|
ifdef CONFIG_PPC32
|
|
CFLAGS_prom_init.o += -fPIC
|
|
CFLAGS_btext.o += -fPIC
|
|
endif
|
|
|
|
CFLAGS_cputable.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
|
|
CFLAGS_prom_init.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
|
|
CFLAGS_btext.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
|
|
CFLAGS_prom.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
|
|
|
|
CFLAGS_prom_init.o += -fno-stack-protector
|
|
CFLAGS_prom_init.o += -DDISABLE_BRANCH_PROFILING
|
|
CFLAGS_prom_init.o += -ffreestanding
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
# Do not trace early boot code
|
|
CFLAGS_REMOVE_cputable.o = $(CC_FLAGS_FTRACE)
|
|
CFLAGS_REMOVE_prom_init.o = $(CC_FLAGS_FTRACE)
|
|
CFLAGS_REMOVE_btext.o = $(CC_FLAGS_FTRACE)
|
|
CFLAGS_REMOVE_prom.o = $(CC_FLAGS_FTRACE)
|
|
endif
|
|
|
|
KASAN_SANITIZE_early_32.o := n
|
|
KASAN_SANITIZE_cputable.o := n
|
|
KASAN_SANITIZE_prom_init.o := n
|
|
KASAN_SANITIZE_btext.o := n
|
|
|
|
ifdef CONFIG_KASAN
|
|
CFLAGS_early_32.o += -DDISABLE_BRANCH_PROFILING
|
|
CFLAGS_cputable.o += -DDISABLE_BRANCH_PROFILING
|
|
CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
|
|
endif
|
|
|
|
obj-y := cputable.o syscalls.o \
|
|
irq.o align.o signal_$(BITS).o pmc.o vdso.o \
|
|
process.o systbl.o idle.o \
|
|
signal.o sysfs.o cacheinfo.o time.o \
|
|
prom.o traps.o setup-common.o \
|
|
udbg.o misc.o io.o misc_$(BITS).o \
|
|
of_platform.o prom_parse.o firmware.o \
|
|
hw_breakpoint_constraints.o
|
|
obj-y += ptrace/
|
|
obj-$(CONFIG_PPC64) += setup_64.o \
|
|
paca.o nvram_64.o note.o syscall_64.o
|
|
obj-$(CONFIG_COMPAT) += sys_ppc32.o signal_32.o
|
|
obj-$(CONFIG_VDSO32) += vdso32_wrapper.o
|
|
obj-$(CONFIG_PPC_WATCHDOG) += watchdog.o
|
|
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
|
|
obj-$(CONFIG_PPC_DAWR) += dawr.o
|
|
obj-$(CONFIG_PPC_BOOK3S_64) += cpu_setup_ppc970.o cpu_setup_pa6t.o
|
|
obj-$(CONFIG_PPC_BOOK3S_64) += cpu_setup_power.o
|
|
obj-$(CONFIG_PPC_BOOK3S_64) += mce.o mce_power.o
|
|
obj-$(CONFIG_PPC_BOOK3E_64) += exceptions-64e.o idle_book3e.o
|
|
obj-$(CONFIG_PPC_BARRIER_NOSPEC) += security.o
|
|
obj-$(CONFIG_PPC64) += vdso64_wrapper.o
|
|
obj-$(CONFIG_ALTIVEC) += vecemu.o
|
|
obj-$(CONFIG_PPC_BOOK3S_IDLE) += idle_book3s.o
|
|
procfs-y := proc_powerpc.o
|
|
obj-$(CONFIG_PROC_FS) += $(procfs-y)
|
|
rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI) := rtas_pci.o
|
|
obj-$(CONFIG_PPC_RTAS) += rtas.o rtas-rtc.o $(rtaspci-y-y)
|
|
obj-$(CONFIG_PPC_RTAS_DAEMON) += rtasd.o
|
|
obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
|
|
obj-$(CONFIG_RTAS_PROC) += rtas-proc.o
|
|
obj-$(CONFIG_PPC_DT_CPU_FTRS) += dt_cpu_ftrs.o
|
|
obj-$(CONFIG_EEH) += eeh.o eeh_pe.o eeh_cache.o \
|
|
eeh_driver.o eeh_event.o eeh_sysfs.o
|
|
obj-$(CONFIG_GENERIC_TBSYNC) += smp-tbsync.o
|
|
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
|
|
obj-$(CONFIG_FA_DUMP) += fadump.o
|
|
obj-$(CONFIG_PRESERVE_FA_DUMP) += fadump.o
|
|
ifdef CONFIG_PPC32
|
|
obj-$(CONFIG_E500) += idle_e500.o
|
|
endif
|
|
obj-$(CONFIG_PPC_BOOK3S_32) += idle_6xx.o l2cr_6xx.o cpu_setup_6xx.o
|
|
obj-$(CONFIG_TAU) += tau_6xx.o
|
|
obj-$(CONFIG_HIBERNATION) += swsusp.o suspend.o
|
|
ifdef CONFIG_FSL_BOOKE
|
|
obj-$(CONFIG_HIBERNATION) += swsusp_booke.o
|
|
else
|
|
obj-$(CONFIG_HIBERNATION) += swsusp_$(BITS).o
|
|
endif
|
|
obj64-$(CONFIG_HIBERNATION) += swsusp_asm64.o
|
|
obj-$(CONFIG_MODULES) += module.o module_$(BITS).o
|
|
obj-$(CONFIG_44x) += cpu_setup_44x.o
|
|
obj-$(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
|
|
extra-y += vmlinux.lds
|
|
|
|
obj-$(CONFIG_RELOCATABLE) += reloc_$(BITS).o
|
|
|
|
obj-$(CONFIG_PPC32) += entry_32.o setup_32.o early_32.o
|
|
obj-$(CONFIG_PPC64) += dma-iommu.o iommu.o
|
|
obj-$(CONFIG_KGDB) += kgdb.o
|
|
obj-$(CONFIG_BOOTX_TEXT) += btext.o
|
|
obj-$(CONFIG_SMP) += smp.o
|
|
obj-$(CONFIG_KPROBES) += kprobes.o
|
|
obj-$(CONFIG_OPTPROBES) += optprobes.o optprobes_head.o
|
|
obj-$(CONFIG_KPROBES_ON_FTRACE) += kprobes-ftrace.o
|
|
obj-$(CONFIG_UPROBES) += uprobes.o
|
|
obj-$(CONFIG_PPC_UDBG_16550) += legacy_serial.o udbg_16550.o
|
|
obj-$(CONFIG_STACKTRACE) += stacktrace.o
|
|
obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o
|
|
obj-$(CONFIG_ARCH_HAS_DMA_SET_MASK) += dma-mask.o
|
|
|
|
pci64-$(CONFIG_PPC64) += pci_dn.o pci-hotplug.o isa-bridge.o
|
|
obj-$(CONFIG_PCI) += pci_$(BITS).o $(pci64-y) \
|
|
pci-common.o pci_of_scan.o
|
|
obj-$(CONFIG_PCI_MSI) += msi.o
|
|
|
|
obj-$(CONFIG_AUDIT) += audit.o
|
|
obj64-$(CONFIG_AUDIT) += compat_audit.o
|
|
|
|
obj-$(CONFIG_PPC_IO_WORKAROUNDS) += io-workarounds.o
|
|
|
|
obj-y += trace/
|
|
|
|
ifneq ($(CONFIG_PPC_INDIRECT_PIO),y)
|
|
obj-y += iomap.o
|
|
endif
|
|
|
|
obj64-$(CONFIG_PPC_TRANSACTIONAL_MEM) += tm.o
|
|
|
|
obj-$(CONFIG_PPC64) += $(obj64-y)
|
|
obj-$(CONFIG_PPC32) += $(obj32-y)
|
|
|
|
ifneq ($(CONFIG_XMON)$(CONFIG_KEXEC_CORE)(CONFIG_PPC_BOOK3S),)
|
|
obj-y += ppc_save_regs.o
|
|
endif
|
|
|
|
obj-$(CONFIG_EPAPR_PARAVIRT) += epapr_paravirt.o epapr_hcalls.o
|
|
obj-$(CONFIG_KVM_GUEST) += kvm.o kvm_emul.o
|
|
ifneq ($(CONFIG_PPC_POWERNV)$(CONFIG_PPC_SVM),)
|
|
obj-y += ucall.o
|
|
endif
|
|
|
|
obj-$(CONFIG_PPC_SECURE_BOOT) += secure_boot.o ima_arch.o secvar-ops.o
|
|
obj-$(CONFIG_PPC_SECVAR_SYSFS) += secvar-sysfs.o
|
|
|
|
# Disable GCOV, KCOV & sanitizers in odd or sensitive code
|
|
GCOV_PROFILE_prom_init.o := n
|
|
KCOV_INSTRUMENT_prom_init.o := n
|
|
UBSAN_SANITIZE_prom_init.o := n
|
|
GCOV_PROFILE_kprobes.o := n
|
|
KCOV_INSTRUMENT_kprobes.o := n
|
|
UBSAN_SANITIZE_kprobes.o := n
|
|
GCOV_PROFILE_kprobes-ftrace.o := n
|
|
KCOV_INSTRUMENT_kprobes-ftrace.o := n
|
|
UBSAN_SANITIZE_kprobes-ftrace.o := n
|
|
GCOV_PROFILE_syscall_64.o := n
|
|
KCOV_INSTRUMENT_syscall_64.o := n
|
|
UBSAN_SANITIZE_syscall_64.o := n
|
|
UBSAN_SANITIZE_vdso.o := n
|
|
|
|
# Necessary for booting with kcov enabled on book3e machines
|
|
KCOV_INSTRUMENT_cputable.o := n
|
|
KCOV_INSTRUMENT_setup_64.o := n
|
|
KCOV_INSTRUMENT_paca.o := n
|
|
|
|
CFLAGS_setup_64.o += -fno-stack-protector
|
|
CFLAGS_paca.o += -fno-stack-protector
|
|
|
|
extra-$(CONFIG_PPC_FPU) += fpu.o
|
|
extra-$(CONFIG_ALTIVEC) += vector.o
|
|
extra-$(CONFIG_PPC64) += entry_64.o
|
|
extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init.o
|
|
|
|
extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init_check
|
|
|
|
quiet_cmd_prom_init_check = PROMCHK $@
|
|
cmd_prom_init_check = $(CONFIG_SHELL) $< "$(NM)" $(obj)/prom_init.o; touch $@
|
|
|
|
$(obj)/prom_init_check: $(src)/prom_init_check.sh $(obj)/prom_init.o FORCE
|
|
$(call if_changed,prom_init_check)
|
|
targets += prom_init_check
|
|
|
|
clean-files := vmlinux.lds
|