2 # Makefile for the linux kernel.
5 extra-y := head.o init_task.o vmlinux.lds
7 obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \
8 ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \
9 pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \
14 obj-$(CONFIG_ACPI) += acpi/
15 obj-$(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-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups.o
27 obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o crash.o
28 obj-$(CONFIG_X86_NUMAQ) += numaq.o
29 obj-$(CONFIG_X86_SUMMIT_NUMA) += summit.o
30 obj-$(CONFIG_KPROBES) += kprobes.o
31 obj-$(CONFIG_MODULES) += module.o
32 obj-y += sysenter.o vsyscall.o
33 obj-$(CONFIG_ACPI_SRAT) += srat.o
34 obj-$(CONFIG_HPET_TIMER) += time_hpet.o
35 obj-$(CONFIG_EFI) += efi.o efi_stub.o
36 obj-$(CONFIG_DOUBLEFAULT) += doublefault.o
37 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
39 EXTRA_AFLAGS := -traditional
41 obj-$(CONFIG_SCx200) += scx200.o
43 # vsyscall.o contains the vsyscall DSO images as __initdata.
44 # We must build both images before we can assemble it.
45 # Note: kbuild does not track this dependency due to usage of .incbin
46 $(obj)/vsyscall.o: $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so
47 targets += $(foreach F,int80 sysenter,vsyscall-$F.o vsyscall-$F.so)
48 targets += vsyscall-note.o vsyscall.lds
50 # The DSO images are built using a special linker script.
51 quiet_cmd_syscall = SYSCALL $@
52 cmd_syscall = $(CC) -m elf_i386 -nostdlib $(SYSCFLAGS_$(@F)) \
53 -Wl,-T,$(filter-out FORCE,$^) -o $@
55 export CPPFLAGS_vsyscall.lds += -P -C -U$(ARCH)
57 vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1
58 SYSCFLAGS_vsyscall-sysenter.so = $(vsyscall-flags)
59 SYSCFLAGS_vsyscall-int80.so = $(vsyscall-flags)
61 $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so: \
62 $(obj)/vsyscall-%.so: $(src)/vsyscall.lds \
63 $(obj)/vsyscall-%.o $(obj)/vsyscall-note.o FORCE
64 $(call if_changed,syscall)
66 # We also create a special relocatable object that should mirror the symbol
67 # table and layout of the linked DSO. With ld -R we can then refer to
68 # these symbols in the kernel code rather than hand-coded addresses.
69 extra-y += vsyscall-syms.o
70 $(obj)/built-in.o: $(obj)/vsyscall-syms.o
71 $(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o
73 SYSCFLAGS_vsyscall-syms.o = -r
74 $(obj)/vsyscall-syms.o: $(src)/vsyscall.lds \
75 $(obj)/vsyscall-sysenter.o $(obj)/vsyscall-note.o FORCE
76 $(call if_changed,syscall)