linux-kernel - [PATCH v4 0/4] objtool: Fix INSN_CONTEXT

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Message-ID: <cover.1744095216.git.jpoimboe@kernel.org>
Date: Tue,  8 Apr 2025 00:02:12 -0700
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Juergen Gross <jgross@...e.com>
Subject: [PATCH v4 0/4] objtool: Fix INSN_CONTEXT_SWITCH

I decided to keep the "unsupported instruction in callable function"
warning, it's not hurting anything.  As a result we now have
INSN_SYSCALL and INSN_SYSRET.

v4:
- split up patches
- don't get rid of "unsupported instruction in callable function" warning
- split INSN_CONTEXT_SWITCH -> INSN_SYSCALL / INSN_SYSRET

v3: https://lore.kernel.org/9b23e4413873bee38961e628b0c73f6d3a26d494.1743799705.git.jpoimboe@kernel.org

Josh Poimboeuf (4):
  objtool: Fix INSN_CONTEXT_SWITCH handling in validate_unret()
  objtool: Split INSN_CONTEXT_SWITCH into INSN_SYSCALL and INSN_SYSRET
  objtool: Stop UNRET validation on UD2
  objtool, xen: Fix INSN_SYSCALL / INSN_SYSRET semantics

 arch/x86/xen/xen-asm.S               |  4 +---
 tools/objtool/arch/x86/decode.c      | 18 ++++++++++-------
 tools/objtool/check.c                | 29 +++++++++++++++++++++-------
 tools/objtool/include/objtool/arch.h |  3 ++-
 4 files changed, 36 insertions(+), 18 deletions(-)

-- 
2.49.0