linux/arch/sh/kernel/vsyscall/Makefile
Paul Mundt 19f9a34f87 sh: Initial vsyscall page support.
This implements initial support for the vsyscall page on SH.
At the moment we leave it configurable due to having nommu
to support from the same code base. We hook it up for the
signal trampoline return at present, with more to be added
later, once uClibc catches up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 18:33:49 +09:00

37 lines
1.2 KiB
Makefile

obj-y += vsyscall.o vsyscall-syscall.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
# 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 \
$(call ld-option, -Wl$(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.
extra-y += vsyscall-syms.o
$(obj)/built-in.o: $(obj)/vsyscall-syms.o
$(obj)/built-in.o: ld_flags += -R $(obj)/vsyscall-syms.o
SYSCFLAGS_vsyscall-syms.o = -r
$(obj)/vsyscall-syms.o: $(src)/vsyscall.lds \
$(obj)/vsyscall-trapa.o $(obj)/vsyscall-note.o FORCE
$(call if_changed,syscall)