* Josh Poimboeuf <[email protected]> wrote:
> This is a major rewrite of objtool. Instead of only tracking frame
> pointer changes, it now tracks all stack-related operations, including
> all register saves/restores.
>
> In addition to making stack validation more robust, this also paves the
> way for undwarf generation.
>
> Signed-off-by: Josh Poimboeuf <[email protected]>
Note, I have applied the first 3 patches, and got a bunch of new warnings on
x86
64-bit allmodconfig:
arch/x86/kernel/alternative.o: warning: objtool: do_sync_core()+0x1b:
unsupported instruction in callable function
arch/x86/kernel/alternative.o: warning: objtool: text_poke()+0x1a8:
unsupported instruction in callable function
arch/x86/kernel/ftrace.o: warning: objtool: do_sync_core()+0x16: unsupported
instruction in callable function
arch/x86/kernel/cpu/mcheck/mce.o: warning: objtool:
machine_check_poll()+0x166: unsupported instruction in callable function
arch/x86/kernel/cpu/mcheck/mce.o: warning: objtool: do_machine_check()+0x147:
unsupported instruction in callable function
(That's the vmlinux build - plus 4 more warnings in the modules build.)
That's with GCC 5.3.1.
Let me know if you need any more info.
Thanks,
Ingo
