Le 22/06/2023 à 08:31, Josh Poimboeuf a écrit :

On Wed, Jun 21, 2023 at 05:20:31PM +0200, Christophe Leroy wrote:

quoted

Most of the time objtool warnings are useless without the
absolute address within the section.

Today there is --sec-address option to get it printed, but
that option is nowhere used and requires a change in Makefile
to use it.

Having the address inside the section at all time in addition
to the address within the object doesn't hurt and will help.

Remove the --sec-address option and print it at all time.

This option actually feels like clutter to me.  The func+offset format
works fine, combined with scripts like objdump-func and faddr2line.  And
we also have a new OBJTOOL_VERBOSE=1 option which auto-disassembles the
affected function.

On x86 we've been using func+offset for console stack traces for many
years, due to KASLR.  So maybe we're just more used to it.  But the
scripts make it fine.

Ah right, I didn't know that script, I was struggling with objtool -dr

Therefore the patch is not needed, and neither is the --sec-address 
option, maybe we can remove it completely.

Also it helps with identifying the same warning across different
configs/compilers.

Good point.

Christophe