On Fri, Oct 11, 2019 at 01:50:44PM +0200, Jiri Slaby wrote:
> Place SYM_*_START_NOALIGN and SYM_*_END around the THUNK macro body.
> Preserve @function by FUNC (64bit) and CODE (32bit). Given it was not
> marked as aligned, use NOALIGN.
Yeah, I guess the NOALIGN is causing some relaxing of alignment because
the symbols all "move up", from looking at the addresses:
before:
$ readelf -a vmlinux | grep -E "\W(trace_hardirqs_o(n|ff)_thunk|lockdep_sys_exit_thunk|___preempt_schedule)"
70007: ffffffff81001c60 28 FUNC GLOBAL DEFAULT 1 trace_hardirqs_off_thunk
78467: ffffffff81001c40 28 FUNC GLOBAL DEFAULT 1 trace_hardirqs_on_thunk
82067: ffffffff81001cc0 24 FUNC GLOBAL DEFAULT 1 ___preempt_schedule_notra
86509: ffffffff81001c80 24 FUNC GLOBAL DEFAULT 1 lockdep_sys_exit_thunk
87594: ffffffff81001ca0 24 FUNC GLOBAL DEFAULT 1 ___preempt_schedule
after:
$ readelf -a vmlinux | grep -E "\W(trace_hardirqs_o(n|ff)_thunk|lockdep_sys_exit_thunk|___preempt_schedule)"
70007: ffffffff81001c50 28 FUNC GLOBAL DEFAULT 1 trace_hardirqs_off_thunk
78467: ffffffff81001c34 28 FUNC GLOBAL DEFAULT 1 trace_hardirqs_on_thunk
82067: ffffffff81001c9c 24 FUNC GLOBAL DEFAULT 1 ___preempt_schedule_notra
86509: ffffffff81001c6c 24 FUNC GLOBAL DEFAULT 1 lockdep_sys_exit_thunk
87594: ffffffff81001c84 24 FUNC GLOBAL DEFAULT 1 ___preempt_schedule
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
