1 # SPDX-License-Identifier: GPL-2.0 <<
2 # 1 #
3 # Makefile for the linux kernel. 2 # Makefile for the linux kernel.
4 # 3 #
5 4
6 extra-y := vmlinux.lds !! 5 extra-y := head.o init_task.o vmlinux.lds.s
7 6
8 obj-y := head.o setup.o or32_ksyms.o process !! 7 obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \
9 traps.o time.o irq.o entry.o ptrace !! 8 ptrace.o i8259.o ioport.o ldt.o setup.o time.o sys_i386.o \
10 sys_call_table.o unwinder.o !! 9 pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \
>> 10 doublefault.o
11 11
12 obj-$(CONFIG_SMP) += smp.o sync- !! 12 obj-y += cpu/
13 obj-$(CONFIG_STACKTRACE) += stacktrace. !! 13 obj-y += timers/
>> 14 obj-$(CONFIG_ACPI_BOOT) += acpi/
>> 15 obj-$(CONFIG_X86_BIOS_REBOOT) += reboot.o
>> 16 obj-$(CONFIG_MCA) += mca.o
>> 17 obj-$(CONFIG_X86_MSR) += msr.o
>> 18 obj-$(CONFIG_X86_CPUID) += cpuid.o
>> 19 obj-$(CONFIG_MICROCODE) += microcode.o
>> 20 obj-$(CONFIG_APM) += apm.o
>> 21 obj-$(CONFIG_X86_SMP) += smp.o smpboot.o
>> 22 obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o
>> 23 obj-$(CONFIG_X86_MPPARSE) += mpparse.o
>> 24 obj-$(CONFIG_X86_LOCAL_APIC) += apic.o nmi.o
>> 25 obj-$(CONFIG_X86_IO_APIC) += io_apic.o
>> 26 obj-$(CONFIG_X86_NUMAQ) += numaq.o
>> 27 obj-$(CONFIG_X86_SUMMIT) += summit.o
>> 28 obj-$(CONFIG_EDD) += edd.o
14 obj-$(CONFIG_MODULES) += module.o 29 obj-$(CONFIG_MODULES) += module.o
15 obj-$(CONFIG_OF) += prom.o !! 30 obj-y += sysenter.o vsyscall.o
>> 31 obj-$(CONFIG_ACPI_SRAT) += srat.o
>> 32 obj-$(CONFIG_HPET_TIMER) += time_hpet.o
16 33
17 clean: !! 34 EXTRA_AFLAGS := -traditional
>> 35
>> 36 obj-$(CONFIG_SCx200) += scx200.o
>> 37
>> 38 # vsyscall.o contains the vsyscall DSO images as __initdata.
>> 39 # We must build both images before we can assemble it.
>> 40 # Note: kbuild does not track this dependency due to usage of .incbin
>> 41 $(obj)/vsyscall.o: $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so
>> 42 targets += $(foreach F,int80 sysenter,vsyscall-$F.o vsyscall-$F.so)
>> 43
>> 44 # The DSO images are built using a special linker script.
>> 45 quiet_cmd_syscall = SYSCALL $@
>> 46 cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \
>> 47 -Wl,-T,$(filter-out FORCE,$^) -o $@
>> 48
>> 49 vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1
>> 50 SYSCFLAGS_vsyscall-sysenter.so = $(vsyscall-flags)
>> 51 SYSCFLAGS_vsyscall-int80.so = $(vsyscall-flags)
>> 52
>> 53 $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so: \
>> 54 $(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
>> 55 $(call if_changed,syscall)
>> 56
>> 57 # We also create a special relocatable object that should mirror the symbol
>> 58 # table and layout of the linked DSO. With ld -R we can then refer to
>> 59 # these symbols in the kernel code rather than hand-coded addresses.
>> 60 extra-y += vsyscall-syms.o
>> 61 $(obj)/built-in.o: $(obj)/vsyscall-syms.o
>> 62 $(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o
>> 63
>> 64 SYSCFLAGS_vsyscall-syms.o = -r
>> 65 $(obj)/vsyscall-syms.o: $(src)/vsyscall.lds $(obj)/vsyscall-sysenter.o FORCE
>> 66 $(call if_changed,syscall)
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