objtool: Create backup on error and print args

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Recreating objtool errors can be a manual process.  Kbuild removes the
object, so it has to be compiled or linked again before running objtool.
Then the objtool args need to be reversed engineered.

Make that all easier by automatically making a backup of the object file
on error, and print a modified version of the args which can be used to
recreate.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/7571e30636359b3e173ce6e122419452bb31882f.1741975349.git.jpoimboe@kernel.org

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Josh Poimboeuf 2025-03-14 12:29:10 -07:00 • committed by Peter Zijlstra

parent a307dd28b1

commit aa8b3e64fd

3 changed files with 65 additions and 67 deletions

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68

tools/objtool/builtin-check.c

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1

tools/objtool/include/objtool/builtin.h

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63

tools/objtool/objtool.c

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