x86_64 UML is unable to load modules if more than 504MiB of memory are used. This happens because on x86_64 the UML process has a quite high start address (typically around 0x6000000). If UML's memory is larger than 504MiB VMALLOC_START happens to be after 0x8000000. This is no problem unless one loads a module which was built with R_X86_64_32S relocations. Symbols with a location > 0x8000000 cannot be used with R_X86_64_32S
To deal with this x86_64 UML has to be compiled with -mcmodel=large such that no R_X86_64_32S relocations are used. Signed-off-by: Richard Weinberger <rich...@nod.at> Reported-by: 전하늘 <allsk...@gmail.com> --- arch/um/Makefile | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/um/Makefile b/arch/um/Makefile index 28688e6..123f073 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -28,6 +28,7 @@ ifeq ($(SUBARCH),i386) endif ifeq ($(SUBARCH),x86_64) HEADER_ARCH := x86 + KBUILD_CFLAGS += -mcmodel=large endif HOST_DIR := arch/$(HEADER_ARCH) -- 1.7.8.3 ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel