1*19f9a34fSPaul Mundtobj-y += vsyscall.o vsyscall-syscall.o 2*19f9a34fSPaul Mundt 3*19f9a34fSPaul Mundt$(obj)/vsyscall-syscall.o: \ 4*19f9a34fSPaul Mundt $(foreach F,trapa,$(obj)/vsyscall-$F.so) 5*19f9a34fSPaul Mundt 6*19f9a34fSPaul Mundt# Teach kbuild about targets 7*19f9a34fSPaul Mundttargets += $(foreach F,trapa,vsyscall-$F.o vsyscall-$F.so) 8*19f9a34fSPaul Mundttargets += vsyscall-note.o vsyscall.lds 9*19f9a34fSPaul Mundt 10*19f9a34fSPaul Mundt# The DSO images are built using a special linker script 11*19f9a34fSPaul Mundtquiet_cmd_syscall = SYSCALL $@ 12*19f9a34fSPaul Mundt cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \ 13*19f9a34fSPaul Mundt -Wl,-T,$(filter-out FORCE,$^) -o $@ 14*19f9a34fSPaul Mundt 15*19f9a34fSPaul Mundtexport CPPFLAGS_vsyscall.lds += -P -C -Ush 16*19f9a34fSPaul Mundt 17*19f9a34fSPaul Mundtvsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \ 18*19f9a34fSPaul Mundt $(call ld-option, -Wl$(comma)--hash-style=sysv) 19*19f9a34fSPaul Mundt 20*19f9a34fSPaul MundtSYSCFLAGS_vsyscall-trapa.so = $(vsyscall-flags) 21*19f9a34fSPaul Mundt 22*19f9a34fSPaul Mundt$(obj)/vsyscall-trapa.so: \ 23*19f9a34fSPaul Mundt$(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE 24*19f9a34fSPaul Mundt $(call if_changed,syscall) 25*19f9a34fSPaul Mundt 26*19f9a34fSPaul Mundt# We also create a special relocatable object that should mirror the symbol 27*19f9a34fSPaul Mundt# table and layout of the linked DSO. With ld -R we can then refer to 28*19f9a34fSPaul Mundt# these symbols in the kernel code rather than hand-coded addresses. 29*19f9a34fSPaul Mundtextra-y += vsyscall-syms.o 30*19f9a34fSPaul Mundt$(obj)/built-in.o: $(obj)/vsyscall-syms.o 31*19f9a34fSPaul Mundt$(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o 32*19f9a34fSPaul Mundt 33*19f9a34fSPaul MundtSYSCFLAGS_vsyscall-syms.o = -r 34*19f9a34fSPaul Mundt$(obj)/vsyscall-syms.o: $(src)/vsyscall.lds \ 35*19f9a34fSPaul Mundt $(obj)/vsyscall-trapa.o $(obj)/vsyscall-note.o FORCE 36*19f9a34fSPaul Mundt $(call if_changed,syscall) 37