diff options
Diffstat (limited to 'arch/sh/kernel/vsyscall/Makefile')
| -rw-r--r-- | arch/sh/kernel/vsyscall/Makefile | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/sh/kernel/vsyscall/Makefile b/arch/sh/kernel/vsyscall/Makefile new file mode 100644 index 000000000..5db6579bc --- /dev/null +++ b/arch/sh/kernel/vsyscall/Makefile @@ -0,0 +1,37 @@ +# 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-$F.so) + +# Teach kbuild about targets +targets += $(foreach F,trapa,vsyscall-$F.o vsyscall-$F.so) +targets += vsyscall-note.o vsyscall.lds 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 CPPFLAGS_vsyscall.lds += -P -C -Ush + +vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \ + $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) + +SYSCFLAGS_vsyscall-trapa.so = $(vsyscall-flags) + +$(obj)/vsyscall-trapa.so: \ +$(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(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)/vsyscall.lds \ + $(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) |