Commit | Line | Data |
---|---|---|
b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
8f5ef7c7 | 2 | obj-y += vsyscall.o vsyscall-syscall.o vsyscall-syms.o |
19f9a34f PM |
3 | |
4 | $(obj)/vsyscall-syscall.o: \ | |
5 | $(foreach F,trapa,$(obj)/vsyscall-$F.so) | |
6 | ||
7 | # Teach kbuild about targets | |
8 | targets += $(foreach F,trapa,vsyscall-$F.o vsyscall-$F.so) | |
8f5ef7c7 | 9 | targets += vsyscall-note.o vsyscall.lds vsyscall-dummy.o |
19f9a34f PM |
10 | |
11 | # The DSO images are built using a special linker script | |
12 | quiet_cmd_syscall = SYSCALL $@ | |
13 | cmd_syscall = $(CC) -nostdlib $(SYSCFLAGS_$(@F)) \ | |
14 | -Wl,-T,$(filter-out FORCE,$^) -o $@ | |
15 | ||
16 | export CPPFLAGS_vsyscall.lds += -P -C -Ush | |
17 | ||
18 | vsyscall-flags = -shared -s -Wl,-soname=linux-gate.so.1 \ | |
f86fd306 | 19 | $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) |
19f9a34f PM |
20 | |
21 | SYSCFLAGS_vsyscall-trapa.so = $(vsyscall-flags) | |
22 | ||
23 | $(obj)/vsyscall-trapa.so: \ | |
24 | $(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE | |
25 | $(call if_changed,syscall) | |
26 | ||
27 | # We also create a special relocatable object that should mirror the symbol | |
28 | # table and layout of the linked DSO. With ld -R we can then refer to | |
29 | # these symbols in the kernel code rather than hand-coded addresses. | |
8f5ef7c7 NP |
30 | SYSCFLAGS_vsyscall-dummy.o = -r |
31 | $(obj)/vsyscall-dummy.o: $(src)/vsyscall.lds \ | |
19f9a34f PM |
32 | $(obj)/vsyscall-trapa.o $(obj)/vsyscall-note.o FORCE |
33 | $(call if_changed,syscall) | |
8f5ef7c7 NP |
34 | |
35 | LDFLAGS_vsyscall-syms.o := -r -R | |
36 | $(obj)/vsyscall-syms.o: $(obj)/vsyscall-dummy.o FORCE | |
37 | $(call if_changed,ld) |