On 12/13/21 2:42 AM, Christophe Leroy wrote: > > Hello Joe, > > I'm implementing LIVEPATCH on PPC32 and I wanted to test with > STRICT_MODULE_RWX enabled so I took your branch as suggested, but I'm > getting the following errors on build. What shall I do ? > > CALL scripts/checksyscalls.sh > CALL scripts/atomic/check-atomics.sh > CHK include/generated/compile.h > KLP lib/livepatch/test_klp_convert1.ko > klp-convert: section .rela.klp.module_relocs.test_klp_convert_mod length > beyond nr_entries > > klp-convert: Unable to load user-provided sympos > make[2]: *** [scripts/Makefile.modfinal:79: > lib/livepatch/test_klp_convert1.ko] Error 255 > KLP lib/livepatch/test_klp_convert2.ko > klp-convert: section .rela.klp.module_relocs.test_klp_convert_mod length > beyond nr_entries > > klp-convert: Unable to load user-provided sympos > make[2]: *** [scripts/Makefile.modfinal:79: > lib/livepatch/test_klp_convert2.ko] Error 255 > KLP lib/livepatch/test_klp_convert_sections.ko > klp-convert: section .rela.klp.module_relocs.test_klp_convert_mod length > beyond nr_entries > > klp-convert: Unable to load user-provided sympos > make[2]: *** [scripts/Makefile.modfinal:79: > lib/livepatch/test_klp_convert_sections.ko] Error 255 > make[2]: Target '__modfinal' not remade because of errors. > make[1]: *** [scripts/Makefile.modpost:145: __modpost] Error 2 > make: *** [Makefile:1770: modules] Error 2 > Hi Christophe, Interesting failure mode. That's klp-convert complaining that it found more relocations in a .klp.module_relocs.<objname> section than expected, i.e. nr_entries = sec->size / sizeof(struct klp_module_reloc). A few possibilities: the ELF sec->size was incorrectly set/read by build/libelf (I doubt that). Or maybe the layout/size of struct klp_module_reloc is not consistent between kernel and userspace (I'm more suspicious of this). Can you post a copy of the build's symbols.klp and lib/livepatch/test_klp_convert1.tmp.ko somewhere? I should be able to start debug with those files. Thanks, -- Joe
