1. 根目录:
2. arch
3. ia64
4. kernel
5. Makefile

#
# Makefile for the linux kernel.
#

ifdef CONFIG_DYNAMIC_FTRACE
CFLAGS_REMOVE_ftrace.o = -pg
endif

extra-y	:= head.o init_task.o vmlinux.lds

obj-y := entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o	\
	 irq_lsapic.o ivt.o machvec.o pal.o paravirt_patchlist.o patch.o process.o perfmon.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

obj-$(CONFIG_ACPI)		+= acpi.o acpi-ext.o
obj-$(CONFIG_IA64_BRL_EMU)	+= brl_emu.o

obj-$(CONFIG_IA64_PALINFO)	+= palinfo.o
obj-$(CONFIG_IOSAPIC)		+= iosapic.o
obj-$(CONFIG_MODULES)		+= module.o
obj-$(CONFIG_SMP)		+= smp.o smpboot.o
obj-$(CONFIG_NUMA)		+= numa.o
obj-$(CONFIG_PERFMON)		+= perfmon_default_smpl.o
obj-$(CONFIG_IA64_CYCLONE)	+= cyclone.o
obj-$(CONFIG_IA64_MCA_RECOVERY)	+= mca_recovery.o
obj-$(CONFIG_KPROBES)		+= kprobes.o jprobes.o
obj-$(CONFIG_DYNAMIC_FTRACE)	+= ftrace.o
obj-$(CONFIG_KEXEC)		+= machine_kexec.o relocate_kernel.o crash.o
obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o
obj-$(CONFIG_IA64_UNCACHED_ALLOCATOR)	+= uncached.o
obj-$(CONFIG_AUDIT)		+= audit.o
obj-$(CONFIG_PCI_MSI)		+= msi_ia64.o
mca_recovery-y			+= mca_drv.o mca_drv_asm.o
obj-$(CONFIG_IA64_MC_ERR_INJECT)+= err_inject.o
obj-$(CONFIG_STACKTRACE)	+= stacktrace.o

obj-$(CONFIG_PARAVIRT)		+= paravirt.o paravirtentry.o \
				   paravirt_patch.o

obj-$(CONFIG_IA64_ESI)		+= esi.o
ifneq ($(CONFIG_IA64_ESI),)
obj-y				+= esi_stub.o	# must be in kernel proper
endif
obj-$(CONFIG_INTEL_IOMMU)	+= pci-dma.o
obj-$(CONFIG_SWIOTLB)		+= pci-swiotlb.o

obj-$(CONFIG_BINFMT_ELF)	+= elfcore.o

# fp_emulate() expects f2-f5,f16-f31 to contain the user-level state.
CFLAGS_traps.o  += -mfixed-range=f2-f5,f16-f31

# The gate DSO image is built using a special linker script.
include $(srctree)/arch/ia64/kernel/Makefile.gate
# tell compiled for native
CPPFLAGS_gate.lds += -D__IA64_GATE_PARAVIRTUALIZED_NATIVE

# Calculate NR_IRQ = max(IA64_NATIVE_NR_IRQS, XEN_NR_IRQS, ...) based on config
define sed-y
	"/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
endef
quiet_cmd_nr_irqs = GEN     $@
define cmd_nr_irqs
	(set -e; \
	 echo "#ifndef __ASM_NR_IRQS_H__"; \
	 echo "#define __ASM_NR_IRQS_H__"; \
	 echo "/*"; \
	 echo " * DO NOT MODIFY."; \
	 echo " *"; \
	 echo " * This file was generated by Kbuild"; \
	 echo " *"; \
	 echo " */"; \
	 echo ""; \
	 sed -ne $(sed-y) $<; \
	 echo ""; \
	 echo "#endif" ) > $@
endef

# We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/kernel/nr-irqs.s: arch/$(SRCARCH)/kernel/nr-irqs.c
	$(Q)mkdir -p $(dir $@)
	$(call if_changed_dep,cc_s_c)

include/generated/nr-irqs.h: arch/$(SRCARCH)/kernel/nr-irqs.s
	$(Q)mkdir -p $(dir $@)
	$(call cmd,nr_irqs)

#
# native ivt.S, entry.S and fsys.S
#
ASM_PARAVIRT_OBJS = ivt.o entry.o fsys.o
define paravirtualized_native
AFLAGS_$(1) += -D__IA64_ASM_PARAVIRTUALIZED_NATIVE
AFLAGS_pvchk-sed-$(1) += -D__IA64_ASM_PARAVIRTUALIZED_PVCHECK
extra-y += pvchk-$(1)
endef
$(foreach obj,$(ASM_PARAVIRT_OBJS),$(eval $(call paravirtualized_native,$(obj))))

#
# Checker for paravirtualizations of privileged operations.
#
quiet_cmd_pv_check_sed = PVCHK   $@
define cmd_pv_check_sed
	sed -f $(srctree)/arch/$(SRCARCH)/scripts/pvcheck.sed $< > $@
endef

$(obj)/pvchk-sed-%.s: $(src)/%.S $(srctree)/arch/$(SRCARCH)/scripts/pvcheck.sed FORCE
	$(call if_changed_dep,as_s_S)
$(obj)/pvchk-%.s: $(obj)/pvchk-sed-%.s FORCE
	$(call if_changed,pv_check_sed)
$(obj)/pvchk-%.o: $(obj)/pvchk-%.s FORCE
	$(call if_changed,as_o_S)
.PRECIOUS: $(obj)/pvchk-sed-%.s $(obj)/pvchk-%.s $(obj)/pvchk-%.o