wireguard-linux/tools/objtool/arch/x86/include/arch_elf.h, branch jd/orphan-parallel WireGuard for the Linux kernel https://git.zx2c4.com/wireguard-linux/atom/tools/objtool/arch/x86/include/arch_elf.h?h=jd%2Forphan-parallel 2020-06-18T15:36:33Z objtool: Fix noinstr vs KCOV 2020-06-18T15:36:33Z Peter Zijlstra peterz@infradead.org 2020-06-12T14:05:26Z urn:sha1:0f1441b44e823a74f3f3780902a113e07c73fbf6 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>