linux-kernel - Re: [PATCH v6 00/30] objtool: Function validation tracing

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Message-ID: <20251121103632.GM4067720@noisy.programming.kicks-ass.net>
Date: Fri, 21 Nov 2025 11:36:32 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Alexandre Chartre <alexandre.chartre@...cle.com>
Cc: linux-kernel@...r.kernel.org, mingo@...nel.org, jpoimboe@...nel.org,
	david.laight.linux@...il.com
Subject: Re: [PATCH v6 00/30] objtool: Function validation tracing

On Fri, Nov 21, 2025 at 10:53:10AM +0100, Alexandre Chartre wrote:
> Alexandre Chartre (30):
>   objtool: Move disassembly functions to a separated file
>   objtool: Create disassembly context
>   objtool: Disassemble code with libopcodes instead of running objdump
>   tool build: Remove annoying newline in build output
>   objtool: Print symbol during disassembly
>   objtool: Store instruction disassembly result
>   objtool: Disassemble instruction on warning or backtrace
>   objtool: Extract code to validate instruction from the validate branch
>     loop
>   objtool: Record symbol name max length
>   objtool: Add option to trace function validation
>   objtool: Trace instruction state changes during function validation
>   objtool: Improve register reporting during function validation
>   objtool: Identify the different types of alternatives
>   objtool: Add functions to better name alternatives
>   objtool: Improve tracing of alternative instructions
>   objtool: Do not validate IBT for .return_sites and .call_sites
>   objtool: Add the --disas=<function-pattern> action
>   objtool: Preserve alternatives order
>   objtool: Print headers for alternatives
>   objtool: Disassemble group alternatives
>   objtool: Print addresses with alternative instructions
>   objtool: Disassemble exception table alternatives
>   objtool: Disassemble jump table alternatives
>   objtool: Fix address references in alternatives
>   objtool: Provide access to feature and flags of group alternatives
>   objtool: Function to get the name of a CPU feature
>   objtool: Improve naming of group alternatives
>   objtool: Compact output for alternatives with one instruction
>   objtool: Add wide output for disassembly
>   objtool: Trim trailing NOPs in alternative

I've pushed out these patches to queue/objtool/core, however when
building defconfig I get this:

  CC      /mnt/hirez/usr/src/linux-2.6/defconfig-build/tools/objtool/librbtree.o
arch/x86/special.c:10:10: fatal error: lib/cpu-feature-names.c: No such file or directory
   10 | #include "lib/cpu-feature-names.c"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

:-(