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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-09-27 09:16:33 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:17 +1100 |
| commit | 91bf695596f594e42d69d70deb2ae53cafecf77c (patch) | |
| tree | f227a7426c8e357087db461585f0d48b2969f6fb /arch/powerpc/kernel/vdso32/Makefile | |
| parent | 550e6074c106e1a6fb57dfef62f0daede12d832c (diff) | |
| download | lwn-91bf695596f594e42d69d70deb2ae53cafecf77c.tar.gz lwn-91bf695596f594e42d69d70deb2ae53cafecf77c.zip | |
powerpc/vdso: Retrieve sigtramp offsets at buildtime
This is copied from arm64.
Instead of using runtime generated signal trampoline offsets,
get offsets at buildtime.
If the said trampoline doesn't exist, build will fail. So no
need to check whether the trampoline exists or not in the VDSO.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/f8bfd6812c3e3678b1cdb4d55a52f9eb022b40d3.1601197618.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/vdso32/Makefile')
| -rw-r--r-- | arch/powerpc/kernel/vdso32/Makefile | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile index a119d9f84b08..59aa2944ecae 100644 --- a/arch/powerpc/kernel/vdso32/Makefile +++ b/arch/powerpc/kernel/vdso32/Makefile @@ -59,6 +59,14 @@ $(obj-vdso32): %.o: %.S FORCE $(obj)/vgettimeofday.o: %.o: %.c FORCE $(call if_changed_dep,vdso32cc) +# Generate VDSO offsets using helper script +gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh +quiet_cmd_vdsosym = VDSOSYM $@ + cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ + +include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE + $(call if_changed,vdsosym) + # actual build commands quiet_cmd_vdso32ld_and_check = VDSO32L $@ cmd_vdso32ld_and_check = $(VDSOCC) $(c_flags) $(CC32FLAGS) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) ; $(cmd_vdso_check) |