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Groups > linux.kernel > #1718488
| From | Josh Poimboeuf <jpoimboe@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: gcc-8 objtool warnings |
| Date | 2017-08-23 18:10 +0200 |
| Message-ID | <uhGoa-2JU-21@gated-at.bofh.it> (permalink) |
| References | <uhCXh-u4-25@gated-at.bofh.it> <uhDgB-Aw-15@gated-at.bofh.it> <uhE30-17N-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Aug 23, 2017 at 03:38:02PM +0200, Arnd Bergmann wrote: > On Wed, Aug 23, 2017 at 2:48 PM, Josh Poimboeuf <jpoimboe@redhat.com> wrote: > > On Wed, Aug 23, 2017 at 02:22:34PM +0200, Arnd Bergmann wrote: > >> ... > >> > >> 0000000000000000 <put_cred_rcu.cold.1>: > >> 0: e8 00 00 00 00 callq 5 <put_cred_rcu.cold.1+0x5> > >> 1: R_X86_64_PC32 __sanitizer_cov_trace_pc-0x4 > >> 5: 44 8b 8b 64 ff ff ff mov -0x9c(%rbx),%r9d > >> c: 48 8b 8b 68 ff ff ff mov -0x98(%rbx),%rcx > >> 13: 44 89 e2 mov %r12d,%edx > >> 16: 44 8b 83 60 ff ff ff mov -0xa0(%rbx),%r8d > >> 1d: 4c 89 ee mov %r13,%rsi > >> 20: 48 c7 c7 00 00 00 00 mov $0x0,%rdi > >> 23: R_X86_64_32S .rodata.str1.8+0x28 > >> 27: e8 00 00 00 00 callq 2c <__kstrtab_creds_are_invalid+0x3> > >> 28: R_X86_64_PC32 panic-0x4 > > > > Thanks. Can you send me one of the .o files? > > Attached here now. Ok, looks like I'll need to add support for this new pattern (jumping to a .cold section in .text.unlikely). I'm also about to start work on fixing that other issue you found with GCC's inefficient update of the stack pointer. I really appreciate your finding all these warnings (and getting advance GCC 8 testing). Thanks again! -- Josh
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gcc-8 objtool warnings Arnd Bergmann <arnd@arndb.de> - 2017-08-23 14:30 +0200
Re: gcc-8 objtool warnings Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-23 14:50 +0200
Re: gcc-8 objtool warnings Arnd Bergmann <arnd@arndb.de> - 2017-08-23 15:40 +0200
Re: gcc-8 objtool warnings Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-23 18:10 +0200
Re: gcc-8 objtool warnings Arnd Bergmann <arnd@arndb.de> - 2017-08-24 12:20 +0200
Re: gcc-8 objtool warnings Josh Poimboeuf <jpoimboe@redhat.com> - 2017-08-24 21:20 +0200
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