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Peter Anvin" , Jason Wessel , Douglas Anderson , Lorena Kretzschmar , Stefan Saecherl , Peter Zijlstra , Christophe JAILLET , Randy Dunlap , Masami Hiramatsu , Andrew Morton , Linux Memory Management List , Christophe Leroy , Geert Uytterhoeven , kgdb-bugreport@lists.sourceforge.net, x86@kernel.org, linux-kernel@vger.kernel.org, Kees Cook , Florian Rommel Subject: Re: [PATCH WIP] x86/kgdb: trampolines for shadowed instructions Message-ID: <202408160303.FvgjFUth-lkp@intel.com> References: <20240814085141.171564-1-mail@florommel.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240814085141.171564-1-mail@florommel.de> X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: D1CAC1C0018 X-Stat-Signature: xikxhdui8ayc9q856c45m1ujmuhruzxy X-HE-Tag: 1723751547-530808 X-HE-Meta: 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 yPr2KI+U s6VYXVBJ4RIF9tw20KJe7Kkz+0ZQdH2LMZyU3bTXfP7azo2CANvoa2yue6QskMAWp8hUVqTJyCeuO+IS8LpGn6FHBbkexQBJOLUzASJ72qxGGnLsNtgdWVRfqHLIpjXUm2b0mp959u3xL1lY33fkZpZ6ilxbOekhPQ8NNoHvqI3h52hRb96hCeiqdWteHfUkU/ojfhFm02NmNrzWo/W/Z/jSQgZRl5Pz1+tIGu0D+9DVs0jGf1RPv+JK//ZdQ38xwogjlaHjHj3XCRdf3/jBUPDVS50TAtX76Wm0BCCFYG01HmKYGnvLJwRQjBbdOsVZzEl+Myqfzp8ga0OQq38d4yIm9H9EmdrWTLFfdMbyH9sswd3/2DdsIhvoJnmF3HqGZjLBgZ1LQ7+ennPLjkVJ11NLCSSydSMPHR+BT92jpFtODnqjPbEvjyLi+Kp/SlgyBgVjzDyvAybTGpIxU6lw1Gganaiq4OHYRY5lQ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Florian, kernel test robot noticed the following build errors: [auto build test ERROR on tip/master] [also build test ERROR on tip/x86/core linus/master v6.11-rc3 next-20240815] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Florian-Rommel/x86-kgdb-trampolines-for-shadowed-instructions/20240814-230936 base: tip/master patch link: https://lore.kernel.org/r/20240814085141.171564-1-mail%40florommel.de patch subject: [PATCH WIP] x86/kgdb: trampolines for shadowed instructions config: x86_64-buildonly-randconfig-004-20240815 (https://download.01.org/0day-ci/archive/20240816/202408160303.FvgjFUth-lkp@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240816/202408160303.FvgjFUth-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202408160303.FvgjFUth-lkp@intel.com/ All errors (new ones prefixed by >>): ld: vmlinux.o: in function `kgdb_arch_init': >> arch/x86/kernel/kgdb.c:416: undefined reference to `execmem_alloc' vim +416 arch/x86/kernel/kgdb.c 410 411 static int kgdb_init_trampolines(void) 412 { 413 /* FIXME: We should reserve enough space for all breakpoints 414 or make the trampoline table dynamic somehow.. */ 415 /* FIXME: Currently borrowing EXECMEM_KPROBES */ > 416 kgdb_trampoline_page = execmem_alloc(EXECMEM_KPROBES, PAGE_SIZE); 417 if (!kgdb_trampoline_page) 418 return 1; 419 memset(kgdb_trampoline_page, INT3_INSN_OPCODE, PAGE_SIZE); 420 set_memory_rox((unsigned long)kgdb_trampoline_page, 1); 421 kgdb_trampoline_page_curr_slot = kgdb_trampoline_page; 422 return 0; 423 } 424 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki