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From: Julien Thierry <jthierry@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: jpoimboe@redhat.com, peterz@infradead.org, mbenes@suse.cz,
	raphael.gault@arm.com, benh@kernel.crashing.org,
	Julien Thierry <jthierry@redhat.com>
Subject: [PATCH v3 0/3] objtool: Extend CFA updating/checking
Date: Wed, 14 Oct 2020 08:37:59 +0100	[thread overview]
Message-ID: <20201014073802.436630-1-jthierry@redhat.com> (raw)

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


             reply	other threads:[~2020-10-14  7:38 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-14  7:37 Julien Thierry [this message]
2020-10-14  7:38 ` [PATCH v3 1/3] objtool: check: Fully validate the stack frame Julien Thierry
2020-10-14  7:38 ` [PATCH v3 2/3] objtool: check: Support addition to set CFA base Julien Thierry
2020-10-14  7:38 ` [PATCH v3 3/3] objtool: check: Make SP memory operation match PUSH/POP semantics Julien Thierry
2020-10-14 12:30 ` [PATCH v3 0/3] objtool: Extend CFA updating/checking Peter Zijlstra

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