On Mon, Jul 25, 2011 at 12:55:54PM +0200, Daniel Lezcano wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > > Hi All, > > I was trying to compile the kernel tree located at: > > http://git.linaro.org/gitweb?p=people/amitk/linux-linaro-pmwg.git;a=summary
What branch and what tag or head commit were you building? > > for a beagleboardXM but the compilation fails with the error > > > /tmp/ccnUvsew.s: Assembler messages: > /tmp/ccnUvsew.s:298: Error: r13 not allowed here -- `bic r7,sp,#8128' > /tmp/ccnUvsew.s:567: Error: r13 not allowed here -- `bic r3,sp,#8128' > /tmp/ccnUvsew.s:642: Error: r13 not allowed here -- `bic r3,sp,#8128' > /tmp/ccnUvsew.s:808: Error: r13 not allowed here -- `bic r4,sp,#8128' > /tmp/ccnUvsew.s:1459: Error: r13 not allowed here -- `bic r3,sp,#8128' > > I suspected the problem was related to the thumb instruction, I disabled > it in the config but I have still the error. Your suspicions are correct -- use of sp as a general-purpose register operand is much more restricted in Thumb-2 than in ARM. (Most of those fancy uses of sp are deprecated in ARM also, since ARMv7.) (Possibly, you disabled CONFIG_ARM_THUMB instead of CONFIG_THUMB2_KERNEL. CONFIG_ARM_THUMB just controls whether Thumb binaries in userspace are supported. However, we do want all code to be buildable in Thumb-2 for ARMv7-capable platforms.) It looks like the above code comes from the the act_mm macro in arch/arm/mm/proc-macros.S, which only seems to be used for fairly old processors, so I wouldn't expect to see a problem when building for Beagle xM (or using omap2plus_defconfig). Are you sure you're building with the correct kernel config? What file is being built when you get these errors? Cheers ---Dave _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
