Mirror of the gdb mailing list
 help / color / mirror / Atom feed
From: Xiaozhu Meng <mxz297@gmail.com>
To: gdb@sourceware.org
Subject: icache-dcache coherence on ARM
Date: Mon, 06 May 2019 19:30:00 -0000	[thread overview]
Message-ID: <CALjUE3-2G9qiL+Ntp2QeCuY5aaiZQbo0YRAmo16ziFFN40KRwA@mail.gmail.com> (raw)

Hi,

I am reading gdb's source code to hopefully get answers for a question that
I have in my other project.

On ARM, the architecture does not guarantee that icache and dcache are
coherent. When GDB writes a software breakpoint into the inferior's address
space, is it possible that the inferior executes outdated code in icache
and thus miss the software breakpoint?

I try to search around the gdb code base to understand whether GDB flushes
icache or not, but could not find answers.

I appreciate any feedback!

Thanks,

--Xiaozhu


             reply	other threads:[~2019-05-06 19:30 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-06 19:30 Xiaozhu Meng [this message]
2019-05-06 20:52 ` John Baldwin
2019-05-06 21:17   ` Xiaozhu Meng
2019-05-06 21:37     ` John Baldwin
2019-05-07  2:52       ` Xiaozhu Meng

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=CALjUE3-2G9qiL+Ntp2QeCuY5aaiZQbo0YRAmo16ziFFN40KRwA@mail.gmail.com \
    --to=mxz297@gmail.com \
    --cc=gdb@sourceware.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