arch/sh/kernel/vsyscall/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 obj-y += vsyscall.o vsyscall-syscall.o vsyscall-syms.o
   3
   4 $(obj)/vsyscall-syscall.o: $(obj)/vsyscall-trapa.so
   5
   6 # Teach kbuild about targets
   7 targets += vsyscall-trapa.o vsyscall-traps.so
   8 targets += vsyscall-note.o vsyscall.lds vsyscall-dummy.o
   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 -Wl,--hash-style=sysv
  18
  19 SYSCFLAGS_vsyscall-trapa.so     = $(vsyscall-flags)
  20
  21 $(obj)/vsyscall-trapa.so: \
  22 $(obj)/vsyscall-%.so: $(obj)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
  23         $(call if_changed,syscall)
  24
  25 # We also create a special relocatable object that should mirror the symbol
  26 # table and layout of the linked DSO.  With ld -R we can then refer to
  27 # these symbols in the kernel code rather than hand-coded addresses.
  28 SYSCFLAGS_vsyscall-dummy.o = -r
  29 $(obj)/vsyscall-dummy.o: $(obj)/vsyscall.lds \
  30                         $(obj)/vsyscall-trapa.o $(obj)/vsyscall-note.o FORCE
  31         $(call if_changed,syscall)
  32
  33 LDFLAGS_vsyscall-syms.o := -r -R
  34 $(obj)/vsyscall-syms.o: $(obj)/vsyscall-dummy.o FORCE
  35         $(call if_changed,ld)