blob: 6e86644480488f692753a84950ea25e8235985c7 [file] [log] [blame]
# SPDX-License-Identifier: GPL-2.0
obj-y += vsyscall.o vsyscall-syscall.o vsyscall-syms.o
$(obj)/vsyscall-syscall.o: \
$(foreach F,trapa,$(obj)/vsyscall-$
# Teach kbuild about targets
targets += $(foreach F,trapa,vsyscall-$F.o vsyscall-$
targets += vsyscall-note.o vsyscall-dummy.o
# The DSO images are built using a special linker script
quiet_cmd_syscall = SYSCALL $@
cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \
-Wl,-T,$(filter-out FORCE,$^) -o $@
export += -P -C -Ush
vsyscall-flags = -shared -s -Wl, -Wl,--hash-style=sysv = $(vsyscall-flags)
$(obj)/ \
$(obj)/ $(src)/ $(obj)/vsyscall-%.o FORCE
$(call if_changed,syscall)
# We also create a special relocatable object that should mirror the symbol
# table and layout of the linked DSO. With ld -R we can then refer to
# these symbols in the kernel code rather than hand-coded addresses.
SYSCFLAGS_vsyscall-dummy.o = -r
$(obj)/vsyscall-dummy.o: $(src)/ \
$(obj)/vsyscall-trapa.o $(obj)/vsyscall-note.o FORCE
$(call if_changed,syscall)
LDFLAGS_vsyscall-syms.o := -r -R
$(obj)/vsyscall-syms.o: $(obj)/vsyscall-dummy.o FORCE
$(call if_changed,ld)