Hi! UserModeLinux is using the arch specific module functions from arch/x86/kernel/module.c. On i386 this works perfectly fine but on x86_64 it causes problems.
apply_relocate_add() assumes modules compiled with -mcmodel=kernel because the kernel lives in the negative 2GiB of the address space. This assumption is not true for UML. On an UML instance with more than 512MiB of memory no modules can be loaded because vmalloc() locates the module near the 2GiB limit and the ELF relocations causes an overflow. (Detected by "if ((s64)val != *(s32 *)loc)" in apply_relocate_add()). Now I'm not sure how to fix this. Mostly because I'm not a module loader nor an ELF expert. 8-) Is there an easy way to adjust the current x86_64 module loader to deal with UML "positive" relocations? Thanks, //richard P.s: Just removing the overflow-check does not fix the problem. ;-) ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
