Objtool changes for v6.1:
- Remove the "ANNOTATE_NOENDBR on ENDBR" warning: it's not really useful and only found a non-bug false positive so far. - Properly decode LOOP/LOOPE/LOOPNE, which were missing from the x86 decoder. Because these instructions are rather ineffective, they never showed up in compiler output, but they are simple enough to support, so add them for completeness. - A bit more cross-arch preparatory work. Signed-off-by: Ingo Molnar <mingo@kernel.org> -----BEGIN PGP SIGNATURE----- iQJFBAABCgAvFiEEBpT5eoXrXCwVQwEKEnMQ0APhK1gFAmM/4C4RHG1pbmdvQGtl cm5lbC5vcmcACgkQEnMQ0APhK1golg//cWCQqnPy1JDwQIF5zm1oNXAZlcyDDfgp 066NP8IlxajWgkPLunRSzId1ZQW4dppk7ccqI/J6mvNgKJe+nKGO1GXJ94aElxmr XJdJm8P3R+sYggfVtxMWqZr5cy9JTa7P/4bKDEC7hyP63FXZkOFA7Fk7PZTU/lKm gQ7IW8CKt+kSqygk8xBTS1gW7EfQWo0hA1mZN75ewwlJP0MJVlECKCfFEjQEVTJb z4M/iCybJolhiAGktGBM+bj8YijN2/ZvZ9zIC90neMaTLNFY6zMlUbV9WmVT5X+F 1UFlKczNpOxwk3/IGVlwn3IzDToxYk1LMkWc7W7bfcu15aPvJUSR/QJjsRoGsLtX R4Cpa8dKkvDkbnMEUV9Y93AUehF6WO5ZEzPieCxEQLLieZD+XWQdSIiCugoB3+Kr BD1n9iE/Gm7IMHAp1yVkNGcMclu4Co9Cc36v71SzfuJznqf+Nv6gm/qy4KCofrZR C1CCnP/y1Yez4Z0avsbsTqQtCr/TCE7Nf8GmV3fL4rMtxG5eTap7X1GswiGRuL/G uTe9oKBHuSYBwrVK14/cqtAaPkSy+tIXb2GZUMfdYwx6baLTnz9MGhhXaOyDEOMw uwt0qd4cXmUqmAhyi+SGRsP4v9HVdmyQFonm8v2gymUltBrb5hWteFOKVPXgt9E+ 4wo/pldrr+A= =D5iK -----END PGP SIGNATURE----- Merge tag 'objtool-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull objtool updates from Ingo Molnar: - Remove the "ANNOTATE_NOENDBR on ENDBR" warning: it's not really useful and only found a non-bug false positive so far. - Properly decode LOOP/LOOPE/LOOPNE, which were missing from the x86 decoder. Because these instructions are rather ineffective, they never showed up in compiler output, but they are simple enough to support, so add them for completeness. - A bit more cross-arch preparatory work. * tag 'objtool-core-2022-10-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: objtool,x86: Teach decode about LOOP* instructions objtool: Remove "ANNOTATE_NOENDBR on ENDBR" warning objtool: Use arch_jump_destination() in read_intra_function_calls()
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commit
65f109e199
@ -635,6 +635,12 @@ int arch_decode_instruction(struct objtool_file *file, const struct section *sec
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*type = INSN_CONTEXT_SWITCH;
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break;
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case 0xe0: /* loopne */
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case 0xe1: /* loope */
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case 0xe2: /* loop */
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*type = INSN_JUMP_CONDITIONAL;
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break;
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case 0xe8:
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*type = INSN_CALL;
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/*
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@ -2107,9 +2107,6 @@ static int read_noendbr_hints(struct objtool_file *file)
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return -1;
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}
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if (insn->type == INSN_ENDBR)
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WARN_FUNC("ANNOTATE_NOENDBR on ENDBR", insn->sec, insn->offset);
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insn->noendbr = 1;
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}
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@ -2238,7 +2235,7 @@ static int read_intra_function_calls(struct objtool_file *file)
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*/
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insn->type = INSN_JUMP_UNCONDITIONAL;
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dest_off = insn->offset + insn->len + insn->immediate;
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dest_off = arch_jump_destination(insn);
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insn->jump_dest = find_insn(file, insn->sec, dest_off);
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if (!insn->jump_dest) {
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WARN_FUNC("can't find call dest at %s+0x%lx",
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