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| author | Eduard Zingerman <eddyz87@gmail.com> | 2026-10-09 03:47:23 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-10-09 20:29:12 +0000 |
| commit | 0360ed8655cfe4ed25d5feb46c7f31addc59e63a (patch) | |
| tree | d01017d6fe704e1c6dd1afc92bcc39f33adc4128 /kernel/crash_dump_dm_crypt.c | |
| parent | ac43e0393f44931bd2d84ab682e78b1f08f9f1ec (diff) | |
bpf: Summarize may write stack slots in insn_aux_data
SCEV needs may-write information to invalidate stack expressions after
indirect writes. Liveness tracks this per function instance,
but SCEV is not callchain-sensitive and needs a summary across
calling contexts.
For each instruction, union the current-frame may_write masks from all
analyzed instances. Represent 8-byte slots as a summary of constituent
halves. Store the summary in insn_aux_data and expose it via a helper.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20261009-scev-minimal-rebase-v3-5-bcba9bc53ac9@gmail.com
Diffstat (limited to 'kernel/crash_dump_dm_crypt.c')
0 files changed, 0 insertions, 0 deletions