Josh Poimboeuf <[email protected]> writes: > On Fri, May 22, 2020 at 02:48:53PM -0400, Boris Ostrovsky wrote: >> > Yes. They just make objtool very unhappy: >> > >> > arch/x86/entry/entry_64.o: warning: objtool: .entry.text+0xfd0: special: >> > can't find orig instruction >> > >> > Peter suggested to use: >> > >> > .pos = . >> > .byte.. >> > jmp >> > .nops (pos + 8) - . >> >> >> Unfortunately this (.nops directive) only works for newer assemblers >> (2.31, per >> https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=gas/NEWS;h=9a3f352108e439754688e19e63a6235b38801182;hb=5eb617a71463fa6810cd14f57adfe7a1efc93a96) >> >> >> I have 2.27 and things don't go well. > > A single nop should be fine, since gas will complain if it tries to move > the IP backwards.
Yes. That's what I posted in the V9 thread :) > (Also I'd vote for normal indentation instead of the "assembler magic > at 4 spaces" thing.) let me fix that
