On Mon, Jan 29, 2018 at 12:43:10PM +0000, Wei Liu wrote: > On Mon, Jan 29, 2018 at 12:26:43PM +0000, Roger Pau Monne wrote: > > Clang assembler doesn't support using .skip with non-absolute > > expressions: > > > > But so is GNU as. From its manual for .skip: > > "This directive emits size bytes, each of value fill. Both size and fill > are absolute expressions."
I guess clang and as have different interpretations of what's an absolute expression. Sadly I don't seem to be able to find neither definitions. I've already reported this to upstream clang long time ago, but it doesn't seem to make any progress: https://bugs.llvm.org/show_bug.cgi?id=27369 And I don't think I can hack this myself. > > entry.S:109:15: error: expected absolute expression > > .skip .Lcr4_alt_end - .Lcr4_alt, 0x90 > > ^ > > > > OOI what makes .Lcr4_alt_end - .Lcr4_alt non-absolute? Clang doesn't consider symbols as absolute expressions, at least in the context of .skip. Thanks, Roger. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
