archive mirror
 help / color / mirror / Atom feed
From: (David Mosberger-Tang)
To: Richard Henderson <>
Subject: Re: [PATCH] fix vsyscall unwind information
Date: Mon, 5 May 2003 09:55:43 -0700	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

>>>>> On Mon, 5 May 2003 09:34:44 -0700, Richard Henderson <> said:

  Richard> On Mon, May 05, 2003 at 08:05:58AM -0700, David
  Richard> Mosberger-Tang wrote: Why?  Certainly it isn't needed for
  Richard> x86.
  >>  Certain applications (such as debuggers) want to know.  Sure,
  >> you can do symbol matching (if you have the symbol table) or
  >> code-reading (assuming you know the exact sigreturn sequence),
  >> but having a marker would be more reliable and faster.

  Richard> Eh.  The whole point was to *eliminate* the special cases.

Signal handlers have special significance on UNIX-like operating
systems.  An application might want to know when it's in a signal
frame.  If it's a problem to do this with DWARF2 info, fine.  If not,
please consider adding a marker (my current version of libunwind for
x86 does code-reading to detect signal-frames; not pretty, but it
works reasonable well in practice; it would be nicer to get rid of the
code-reading though, in the future).


  reply	other threads:[~2003-05-05 16:53 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20030502004014$>
     [not found] ` <20030503210015$>
     [not found]   ` <20030504063010$>
2003-05-05  6:49     ` David Mosberger-Tang
2003-05-05  7:42       ` Richard Henderson
2003-05-05 15:05         ` David Mosberger-Tang
2003-05-05 16:34           ` Richard Henderson
2003-05-05 16:55             ` David Mosberger-Tang [this message]
2003-05-05 23:10             ` Mark Kettenis
2003-05-06  0:21               ` Richard Henderson
2003-05-06  6:16                 ` David Mosberger-Tang
2003-05-02  0:33 [PATCH] i386 vsyscall DSO implementation, take 2 Roland McGrath
2003-05-03 20:51 ` Richard Henderson
2003-05-04  6:21   ` [PATCH] fix vsyscall unwind information Richard Henderson
2003-05-04  7:34     ` Ulrich Drepper

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \
    --subject='Re: [PATCH] fix vsyscall unwind information' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

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).