From: afiskon@devzen.ru (Aleksander Alekseev)
To: kernelnewbies@lists.kernelnewbies.org
Subject: How to compile Linux kernel with -O0 flag
Date: Sat, 13 Aug 2016 21:15:16 +0300 [thread overview]
Message-ID: <20160813211516.7a8dace1@e733> (raw)
Hello
I'm currently exploring different ways of debugging Linux kernel. And I
noticed that for many variables gdb displays <optimized out>. Also from
experience of debugging ring3 code I know that sometimes debugger may
act crazy unless -O0 was used.
Apparently there is no corresponding option in `make menuconfig`. So
how do you solve this problem? Just `CFLAGS=-O0 make ...` or somehow
else? I wonder what is the "right" way of doing it because you know,
it's a kernel, it can accidentally break something unless you are
careful :)
--
Best regards,
Aleksander Alekseev
next reply other threads:[~2016-08-13 18:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-13 18:15 Aleksander Alekseev [this message]
2016-08-13 18:35 ` How to compile Linux kernel with -O0 flag Greg KH
2016-08-13 18:56 ` Aleksander Alekseev
2016-08-13 19:12 ` Greg KH
2016-08-13 19:15 ` Mike Krinkin
2016-08-14 11:11 ` Hao Lee
2016-08-14 11:31 ` Greg KH
2016-08-14 12:05 ` Hao Lee
2016-08-14 14:20 ` Yann Droneaud
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160813211516.7a8dace1@e733 \
--to=afiskon@devzen.ru \
--cc=kernelnewbies@lists.kernelnewbies.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).