arch/sh/kernel/vsyscall/Makefile

   1 obj-y += vsyscall.o vsyscall-syscall.o
   2
   3 $(obj)/vsyscall-syscall.o: \
   4         $(foreach F,trapa,$(obj)/vsyscall-$F.so)
   5
   6 # Teach kbuild about targets
   7 targets += $(foreach F,trapa,vsyscall-$F.o vsyscall-$F.so)
   8 targets += vsyscall-note.o vsyscall.lds
   9
  10 # The DSO images are built using a special linker script
  11 quiet_cmd_syscall = SYSCALL $@
  12       cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \
  13                            -Wl,-T,$(filter-out FORCE,$^) -o $@
  14
  15 export CPPFLAGS_vsyscall.lds += -P -C -Ush
  16
  17 vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \
  18                 $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
  19
  20 SYSCFLAGS_vsyscall-trapa.so     = $(vsyscall-flags)
  21
  22 $(obj)/vsyscall-trapa.so: \
  23 $(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
  24         $(call if_changed,syscall)
  25
  26 # We also create a special relocatable object that should mirror the symbol
  27 # table and layout of the linked DSO.  With ld -R we can then refer to
  28 # these symbols in the kernel code rather than hand-coded addresses.
  29 extra-y += vsyscall-syms.o
  30 $(obj)/built-in.o: $(obj)/vsyscall-syms.o
  31 $(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o
  32
  33 SYSCFLAGS_vsyscall-syms.o = -r
  34 $(obj)/vsyscall-syms.o: $(src)/vsyscall.lds \
  35                         $(obj)/vsyscall-trapa.o $(obj)/vsyscall-note.o FORCE
  36         $(call if_changed,syscall)