diff options
| 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/perf/callchain_64.c | |
| parent | 550e6074c106e1a6fb57dfef62f0daede12d832c (diff) | |
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/perf/callchain_64.c')
| -rw-r--r-- | arch/powerpc/perf/callchain_64.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/perf/callchain_64.c b/arch/powerpc/perf/callchain_64.c index 6b9c06058c33..8d0df4226328 100644 --- a/arch/powerpc/perf/callchain_64.c +++ b/arch/powerpc/perf/callchain_64.c @@ -68,8 +68,8 @@ static int is_sigreturn_64_address(unsigned long nip, unsigned long fp) { if (nip == fp + offsetof(struct signal_frame_64, tramp)) return 1; - if (vdso64_rt_sigtramp && current->mm->context.vdso && - nip == (unsigned long)current->mm->context.vdso + vdso64_rt_sigtramp) + if (current->mm->context.vdso && + nip == VDSO64_SYMBOL(current->mm->context.vdso, sigtramp_rt64)) return 1; return 0; } |