linux-kernel - [PATCH v3 0/3] objtool: Extend CFA updating/checking

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Date:   Wed, 14 Oct 2020 08:37:59 +0100
From:   Julien Thierry <jthierry@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     jpoimboe@...hat.com, peterz@...radead.org, mbenes@...e.cz,
        raphael.gault@....com, benh@...nel.crashing.org,
        Julien Thierry <jthierry@...hat.com>
Subject: [PATCH v3 0/3] objtool: Extend CFA updating/checking

Hi,

The following patches are the result of limitation found on the CFA
management code when trying to validate arm64 frames. I tried to keep
things simple and not contradict current CFA management logic nor
introduce too many corner cases.

Changes since V2[1]:
- Simplify cfa offset checking for BP and return address

[1] https://lkml.org/lkml/2020/9/28/354

Thanks,

Julien

Julien Thierry (3):
  objtool: check: Fully validate the stack frame
  objtool: check: Support addition to set CFA base
  objtool: check: Make SP memory operation match PUSH/POP semantics

 tools/objtool/check.c | 46 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 42 insertions(+), 4 deletions(-)

--
2.25.4