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-$(CONFIG_EARLY_PRINTK) += early_printk.o
35 EXTRA_AFLAGS := -traditional
37 obj-$(CONFIG_SCx200) += scx200.o
39 # vsyscall.o contains the vsyscall DSO images as __initdata.
40 # We must build both images before we can assemble it.
41 # Note: kbuild does not track this dependency due to usage of .incbin
42 $(obj)/vsyscall.o: $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so
43 targets += $(foreach F,int80 sysenter,vsyscall-$F.o vsyscall-$F.so)
45 # The DSO images are built using a special linker script.
46 quiet_cmd_syscall = SYSCALL $@
47 cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \
48 -Wl,-T,$(filter-out FORCE,$^) -o $@
50 vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1
51 SYSCFLAGS_vsyscall-sysenter.so = $(vsyscall-flags)
52 SYSCFLAGS_vsyscall-int80.so = $(vsyscall-flags)
54 $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so: \
55 $(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
56 $(call if_changed,syscall)
58 # We also create a special relocatable object that should mirror the symbol
59 # table and layout of the linked DSO. With ld -R we can then refer to
60 # these symbols in the kernel code rather than hand-coded addresses.
61 extra-y += vsyscall-syms.o
62 $(obj)/built-in.o: $(obj)/vsyscall-syms.o
63 $(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o
65 SYSCFLAGS_vsyscall-syms.o = -r
66 $(obj)/vsyscall-syms.o: $(src)/vsyscall.lds $(obj)/vsyscall-sysenter.o FORCE
67 $(call if_changed,syscall)