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author | Peter Zijlstra <peterz@infradead.org> | 2020-06-12 17:05:26 +0300 |
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committer | Peter Zijlstra <peterz@infradead.org> | 2020-06-18 18:36:33 +0300 |
commit | 0f1441b44e823a74f3f3780902a113e07c73fbf6 (patch) | |
tree | 5ef3755754810974096c758d5878dc31d23d7c20 /tools/objtool/elf.c | |
parent | fdabdd0b05e0bdf232340d5da86563ed142a99a7 (diff) |
objtool: Fix noinstr vs KCOV
Since many compilers cannot disable KCOV with a function attribute,
help it to NOP out any __sanitizer_cov_*() calls injected in noinstr
code.
This turns:
12: e8 00 00 00 00 callq 17 <lockdep_hardirqs_on+0x17>
13: R_X86_64_PLT32 __sanitizer_cov_trace_pc-0x4
into:
12: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
13: R_X86_64_NONE __sanitizer_cov_trace_pc-0x4
Just like recordmcount does.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Diffstat (limited to 'tools/objtool/elf.c')
0 files changed, 0 insertions, 0 deletions