https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95671
--- Comment #4 from Maxim Britov <ungift-ed at ya dot ru> --- (In reply to Martin Liška from comment #1) > Can you please attach a pre-processed file for an object that fails with > objtool? Heh... I'm afraid I need some howto for this... :( But I made some minimal reproducible .config for kernel 5.7 $ tar xf linux-5.7.tar.xz $ cd linux-5.7 $ curl https://raw.githubusercontent.com/graysky2/kernel_gcc_patch/master/enable_additional_cpu_optimizations_for_gcc_v9.1%2B_kernel_v5.7%2B.patch | patch -p1 $ copy .config10 .config $ make oldconfig $ make I will attach my .config10 For me it fails: CC arch/x86/entry/vdso/vma.o LDS arch/x86/entry/vdso/vdso.lds AS arch/x86/entry/vdso/vdso-note.o CC arch/x86/entry/vdso/vclock_gettime.o CC arch/x86/entry/vdso/vgetcpu.o VDSO arch/x86/entry/vdso/vdso64.so.dbg OBJCOPY arch/x86/entry/vdso/vdso64.so HOSTCC arch/x86/entry/vdso/vdso2c VDSO2C arch/x86/entry/vdso/vdso-image-64.c CC arch/x86/entry/vdso/vdso-image-64.o AR arch/x86/entry/vdso/built-in.a CC arch/x86/entry/vsyscall/vsyscall_64.o arch/x86/entry/vsyscall/vsyscall_64.o: warning: objtool: emulate_vsyscall()+0x60: can't find jump dest instruction at .text+0x10a make[3]: *** [scripts/Makefile.build:267: arch/x86/entry/vsyscall/vsyscall_64.o] Error 255 make[3]: *** Deleting file 'arch/x86/entry/vsyscall/vsyscall_64.o' make[2]: *** [scripts/Makefile.build:488: arch/x86/entry/vsyscall] Error 2 make[1]: *** [scripts/Makefile.build:488: arch/x86/entry] Error 2 make: *** [Makefile:1729: arch/x86] Error 2
