All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jan Kiszka <jan.kiszka@siemens.com>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] Fragile MAX_OP_PER_INSTR
Date: Tue, 22 Apr 2008 12:19:06 +0200	[thread overview]
Message-ID: <480DBB9A.2050905@siemens.com> (raw)

Hi,

we ran into a weird SEGFAULT of QEMU which turned out to be a corruption
of tcg_ctx due to writing beyond gen_opc_buf. The reason for this was a
too small MAX_OP_PER_INSTR, given a particular toolchain (here the one
of SLES 10 for x86-32). So far it runs fine with

#define MAX_OP_PER_INSTR 64

Does anyone have an idea how to resolve the related comment in exec-all.h?

/* XXX: make safe guess about sizes */

Or should we just increase the safety margin?

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux

             reply	other threads:[~2008-04-22 10:19 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-22 10:19 Jan Kiszka [this message]
2008-05-06 12:39 ` [Qemu-devel] Fragile MAX_OP_PER_INSTR Edgar E. Iglesias

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=480DBB9A.2050905@siemens.com \
    --to=jan.kiszka@siemens.com \
    --cc=qemu-devel@nongnu.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.