| commit | fe8d9571dc50232b569242fac7ea6332a654f186 | [log] [tgz] |
|---|---|---|
| author | Alexei Starovoitov <ast@kernel.org> | Fri Jun 14 15:43:28 2019 -0700 |
| committer | Alexei Starovoitov <ast@kernel.org> | Fri Jun 14 18:02:25 2019 -0700 |
| tree | 5278d30db2ccb8b0b61d787ab9c867482b1de0a7 | |
| parent | 86723c8640633bee4b4588d3c7784ee7a0032f65 [diff] |
bpf, x64: fix stack layout of JITed bpf code
Since commit 177366bf7ceb the %rbp stopped pointing to %rbp of the
previous stack frame. That broke frame pointer based stack unwinding.
This commit is a partial revert of it.
Note that the location of tail_call_cnt is fixed, since the verifier
enforces MAX_BPF_STACK stack size for programs with tail calls.
Fixes: 177366bf7ceb ("bpf: change x86 JITed program stack layout")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>