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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-10-10 09:56:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-10-10 09:56:19 -0700 |
| commit | 65f109e19976a833c18820e3950c8f2bb8bd19b4 (patch) | |
| tree | cd43551eb1136c0074edf3bedc8e299cd6e851c0 /tools/objtool | |
| parent | 3e71f0167b3db4e4b3d0d8353c375f6587323052 (diff) | |
| parent | 7a7621dfa417aa3715d2a3bd1bdd6cf5018274d0 (diff) | |
| download | linux-65f109e19976a833c18820e3950c8f2bb8bd19b4.tar.bz2 | |
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()
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/arch/x86/decode.c | 6 | ||||
| -rw-r--r-- | tools/objtool/check.c | 5 |
2 files changed, 7 insertions, 4 deletions
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index c260006106be..1c253b4b7ce0 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -635,6 +635,12 @@ int arch_decode_instruction(struct objtool_file *file, const struct section *sec *type = INSN_CONTEXT_SWITCH; break; + case 0xe0: /* loopne */ + case 0xe1: /* loope */ + case 0xe2: /* loop */ + *type = INSN_JUMP_CONDITIONAL; + break; + case 0xe8: *type = INSN_CALL; /* diff --git a/tools/objtool/check.c b/tools/objtool/check.c index a8cf38639fe8..715f35a8cc00 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2107,9 +2107,6 @@ static int read_noendbr_hints(struct objtool_file *file) return -1; } - if (insn->type == INSN_ENDBR) - WARN_FUNC("ANNOTATE_NOENDBR on ENDBR", insn->sec, insn->offset); - insn->noendbr = 1; } @@ -2238,7 +2235,7 @@ static int read_intra_function_calls(struct objtool_file *file) */ insn->type = INSN_JUMP_UNCONDITIONAL; - dest_off = insn->offset + insn->len + insn->immediate; + dest_off = arch_jump_destination(insn); insn->jump_dest = find_insn(file, insn->sec, dest_off); if (!insn->jump_dest) { WARN_FUNC("can't find call dest at %s+0x%lx", |