1*8f5ef7c7SNicholas Pigginobj-y += vsyscall.o vsyscall-syscall.o vsyscall-syms.o 219f9a34fSPaul Mundt 319f9a34fSPaul Mundt$(obj)/vsyscall-syscall.o: \ 419f9a34fSPaul Mundt $(foreach F,trapa,$(obj)/vsyscall-$F.so) 519f9a34fSPaul Mundt 619f9a34fSPaul Mundt# Teach kbuild about targets 719f9a34fSPaul Mundttargets += $(foreach F,trapa,vsyscall-$F.o vsyscall-$F.so) 8*8f5ef7c7SNicholas Piggintargets += vsyscall-note.o vsyscall.lds vsyscall-dummy.o 919f9a34fSPaul Mundt 1019f9a34fSPaul Mundt# The DSO images are built using a special linker script 1119f9a34fSPaul Mundtquiet_cmd_syscall = SYSCALL $@ 1219f9a34fSPaul Mundt cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \ 1319f9a34fSPaul Mundt -Wl,-T,$(filter-out FORCE,$^) -o $@ 1419f9a34fSPaul Mundt 1519f9a34fSPaul Mundtexport CPPFLAGS_vsyscall.lds += -P -C -Ush 1619f9a34fSPaul Mundt 1719f9a34fSPaul Mundtvsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \ 18f86fd306SSam Ravnborg $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) 1919f9a34fSPaul Mundt 2019f9a34fSPaul MundtSYSCFLAGS_vsyscall-trapa.so = $(vsyscall-flags) 2119f9a34fSPaul Mundt 2219f9a34fSPaul Mundt$(obj)/vsyscall-trapa.so: \ 2319f9a34fSPaul Mundt$(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE 2419f9a34fSPaul Mundt $(call if_changed,syscall) 2519f9a34fSPaul Mundt 2619f9a34fSPaul Mundt# We also create a special relocatable object that should mirror the symbol 2719f9a34fSPaul Mundt# table and layout of the linked DSO. With ld -R we can then refer to 2819f9a34fSPaul Mundt# these symbols in the kernel code rather than hand-coded addresses. 29*8f5ef7c7SNicholas PigginSYSCFLAGS_vsyscall-dummy.o = -r 30*8f5ef7c7SNicholas Piggin$(obj)/vsyscall-dummy.o: $(src)/vsyscall.lds \ 3119f9a34fSPaul Mundt $(obj)/vsyscall-trapa.o $(obj)/vsyscall-note.o FORCE 3219f9a34fSPaul Mundt $(call if_changed,syscall) 33*8f5ef7c7SNicholas Piggin 34*8f5ef7c7SNicholas PigginLDFLAGS_vsyscall-syms.o := -r -R 35*8f5ef7c7SNicholas Piggin$(obj)/vsyscall-syms.o: $(obj)/vsyscall-dummy.o FORCE 36*8f5ef7c7SNicholas Piggin $(call if_changed,ld) 37