From 19f9a34f87c48bbd270d617d1c986d0c23866a1a Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 27 Sep 2006 18:33:49 +0900 Subject: 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 --- arch/sh/kernel/vsyscall/Makefile | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 arch/sh/kernel/vsyscall/Makefile (limited to 'arch/sh/kernel/vsyscall/Makefile') diff --git a/arch/sh/kernel/vsyscall/Makefile b/arch/sh/kernel/vsyscall/Makefile new file mode 100644 index 000000000000..4bbce1cfa359 --- /dev/null +++ b/arch/sh/kernel/vsyscall/Makefile @@ -0,0 +1,36 @@ +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) -- cgit v1.2.1