------- Comment #19 from raj dot khem at gmail dot com 2010-05-30 05:58 ------- (In reply to comment #18) > Created an attachment (id=20773) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20773&action=view) [edit] > linux kernel workaround for attribute naked breakage > > This patch makes the Linux kernel add noinline and noclone attributes to > functions declared __naked. This allows gcc-4.5 to build a working 2.6.34 > Linux kernel for my mach-iop32x/n2100 ARM box. > > Khem: can you check if this kernel-side workaround fixes your problem?
I have tried using __noclone__ a couple of days ago to workaround the problem //static void __attribute__((__naked__, __noinline__, __noclone__, __no_instrument_function__)) static void __attribute__((__naked__, __no_instrument_function__)) v4wb_copy_user_page(void *kto, const void *kfrom) But my gcc seems to ignore it and its generating same code for both with Os and O2 for both above cases. Hence did not solve my issue. I am using snapshot of 4.5 branch from May 20 > > Eventually I'd like the kernel to not use __naked, but that is non-trivial. > This fix should work now and be easily backportable to older kernels. > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44290
