| 1 | # |
| 2 | # Makefile for the linux kernel. |
| 3 | # |
| 4 | |
| 5 | extra-y := head.o init_task.o vmlinux.lds |
| 6 | |
| 7 | obj-y := process.o semaphore.o signal.o entry.o traps.o irq.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 \ |
| 10 | quirks.o i8237.o |
| 11 | |
| 12 | obj-y += cpu/ |
| 13 | obj-y += timers/ |
| 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-$(CONFIG_VM86) += vm86.o |
| 38 | obj-$(CONFIG_EARLY_PRINTK) += early_printk.o |
| 39 | |
| 40 | EXTRA_AFLAGS := -traditional |
| 41 | |
| 42 | obj-$(CONFIG_SCx200) += scx200.o |
| 43 | |
| 44 | # vsyscall.o contains the vsyscall DSO images as __initdata. |
| 45 | # We must build both images before we can assemble it. |
| 46 | # Note: kbuild does not track this dependency due to usage of .incbin |
| 47 | $(obj)/vsyscall.o: $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so |
| 48 | targets += $(foreach F,int80 sysenter,vsyscall-$F.o vsyscall-$F.so) |
| 49 | targets += vsyscall-note.o vsyscall.lds |
| 50 | |
| 51 | # The DSO images are built using a special linker script. |
| 52 | quiet_cmd_syscall = SYSCALL $@ |
| 53 | cmd_syscall = $(CC) -m elf_i386 -nostdlib $(SYSCFLAGS_$(@F)) \ |
| 54 | -Wl,-T,$(filter-out FORCE,$^) -o $@ |
| 55 | |
| 56 | export CPPFLAGS_vsyscall.lds += -P -C -U$(ARCH) |
| 57 | |
| 58 | vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 |
| 59 | SYSCFLAGS_vsyscall-sysenter.so = $(vsyscall-flags) |
| 60 | SYSCFLAGS_vsyscall-int80.so = $(vsyscall-flags) |
| 61 | |
| 62 | $(obj)/vsyscall-int80.so $(obj)/vsyscall-sysenter.so: \ |
| 63 | $(obj)/vsyscall-%.so: $(src)/vsyscall.lds \ |
| 64 | $(obj)/vsyscall-%.o $(obj)/vsyscall-note.o FORCE |
| 65 | $(call if_changed,syscall) |
| 66 | |
| 67 | # We also create a special relocatable object that should mirror the symbol |
| 68 | # table and layout of the linked DSO. With ld -R we can then refer to |
| 69 | # these symbols in the kernel code rather than hand-coded addresses. |
| 70 | extra-y += vsyscall-syms.o |
| 71 | $(obj)/built-in.o: $(obj)/vsyscall-syms.o |
| 72 | $(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o |
| 73 | |
| 74 | SYSCFLAGS_vsyscall-syms.o = -r |
| 75 | $(obj)/vsyscall-syms.o: $(src)/vsyscall.lds \ |
| 76 | $(obj)/vsyscall-sysenter.o $(obj)/vsyscall-note.o FORCE |
| 77 | $(call if_changed,syscall) |