1 obj-y += vsyscall.o vsyscall-syscall.o
3 $(obj)/vsyscall-syscall.o: \
4 $(foreach F,trapa,$(obj)/vsyscall-$F.so)
6 # Teach kbuild about targets
7 targets += $(foreach F,trapa,vsyscall-$F.o vsyscall-$F.so)
8 targets += vsyscall-note.o vsyscall.lds
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 $@
15 export CPPFLAGS_vsyscall.lds += -P -C -Ush
17 vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \
18 $(call ld-option, -Wl$(comma)--hash-style=sysv)
20 SYSCFLAGS_vsyscall-trapa.so = $(vsyscall-flags)
22 $(obj)/vsyscall-trapa.so: \
23 $(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
24 $(call if_changed,syscall)
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
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)