2 # Makefile for the linux kernel.
5 extra-y := head.o init_task.o vmlinux.lds.s
7 obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \
8 ptrace.o i8259.o ioport.o ldt.o setup.o time.o sys_i386.o \
9 pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \
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_NUMA) += summit.o
28 obj-$(CONFIG_MODULES) += module.o
29 obj-y += sysenter.o vsyscall.o
30 obj-$(CONFIG_ACPI_SRAT) += srat.o
31 obj-$(CONFIG_HPET_TIMER) += time_hpet.o
32 obj-$(CONFIG_EFI) += efi.o efi_stub.o
33 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
34 obj-$(CONFIG_X86_STD_RESOURCES) += std_resources.o
36 EXTRA_AFLAGS := -traditional
38 obj-$(CONFIG_SCx200) += scx200.o
40 # vsyscall.o contains the vsyscall DSO images as __initdata.
41 # We must build both images before we can assemble it.
42 # Note: kbuild does not track this dependency due to usage of .incbin
43 $(obj)/vsyscall.o: $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so
44 targets += $(foreach F,int80 sysenter,vsyscall-$F.o vsyscall-$F.so)
46 # The DSO images are built using a special linker script.
47 quiet_cmd_syscall = SYSCALL $@
48 cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \
49 -Wl,-T,$(filter-out FORCE,$^) -o $@
51 vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1
52 SYSCFLAGS_vsyscall-sysenter.so = $(vsyscall-flags)
53 SYSCFLAGS_vsyscall-int80.so = $(vsyscall-flags)
55 $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so: \
56 $(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
57 $(call if_changed,syscall)
59 # We also create a special relocatable object that should mirror the symbol
60 # table and layout of the linked DSO. With ld -R we can then refer to
61 # these symbols in the kernel code rather than hand-coded addresses.
62 extra-y += vsyscall-syms.o
63 $(obj)/built-in.o: $(obj)/vsyscall-syms.o
64 $(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o
66 SYSCFLAGS_vsyscall-syms.o = -r
67 $(obj)/vsyscall-syms.o: $(src)/vsyscall.lds $(obj)/vsyscall-sysenter.o FORCE
68 $(call if_changed,syscall)