1 obj-y
+= vsyscall.o vsyscall-syscall.o
3 $(obj
)/vsyscall-syscall.o
: \
4 $(foreach F
,trapa
,$(obj
)/vsyscall-
$F.so
)
6 # Teach kbuild about targets
7 targets
+= $(foreach F
,trapa
,vsyscall-
$F.o vsyscall-
$F.so
)
8 targets
+= vsyscall-note.o vsyscall.lds
10 # The DSO images are built using a special linker script
11 quiet_cmd_syscall
= SYSCALL
$@
12 cmd_syscall
= $(CC
) -nostdlib
$(SYSCFLAGS_
$(@F
)) \
13 -Wl
,-T
,$(filter-out FORCE
,$^
) -o
$@
15 export CPPFLAGS_vsyscall.lds
+= -P
-C
-Ush
17 vsyscall-flags
= -shared
-s
-Wl
,-soname
=linux-gate.so
.1 \
18 $(call ld-option
, -Wl
$(comma
)--hash-style
=sysv
)
20 SYSCFLAGS_vsyscall-trapa.so
= $(vsyscall-flags
)
22 $(obj
)/vsyscall-trapa.so
: \
23 $(obj
)/vsyscall-
%.so
: $(src
)/vsyscall.lds
$(obj
)/vsyscall-
%.o FORCE
24 $(call if_changed
,syscall
)
26 # We also create a special relocatable object that should mirror the symbol
27 # table and layout of the linked DSO. With ld -R we can then refer to
28 # these symbols in the kernel code rather than hand-coded addresses.
29 extra-y
+= vsyscall-syms.o
30 $(obj
)/built-in.o
: $(obj
)/vsyscall-syms.o
31 $(obj
)/built-in.o
: ld_flags
+= -R
$(obj
)/vsyscall-syms.o
33 SYSCFLAGS_vsyscall-syms.o
= -r
34 $(obj
)/vsyscall-syms.o
: $(src
)/vsyscall.lds \
35 $(obj
)/vsyscall-trapa.o
$(obj
)/vsyscall-note.o FORCE
36 $(call if_changed
,syscall
)
