| Date | Wed, 09 Aug 2023 09:12:32 +0200 | From | Peter Zijlstra <> | Subject | [RFC][PATCH 14/17] objtool: Add comments to the arch_is_$foo() magic symbols |
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Clarification was asked for...
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- tools/objtool/check.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
--- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1292,16 +1292,28 @@ static int add_ignore_alternatives(struc return 0; } +/* + * Symbols that replace INSN_CALL_DYNAMIC, every (tail) call to such a symbol + * will be added to the .retpoline_sites section. + */ __weak bool arch_is_retpoline(struct symbol *sym) { return false; } +/* + * Symbols that replace INSN_RETURN, every (tail) call to such a symbol + * will be added to the .return_sites section. + */ __weak bool arch_is_rethunk(struct symbol *sym) { return false; } +/* + * Symbols that are embedded inside other instructions, because sometimes crazy + * code exists. These are mostly ignored for validation purposes. + */ __weak bool arch_is_offset_insn(struct symbol *sym) { return false;
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