From: Tom Tromey <tromey@redhat.com>
To: "Pierre Muller" <pierre.muller@ics-cnrs.unistra.fr>
Cc: <gdb-patches@sourceware.org>
Subject: Re: [RFC] pascal: also handle Free Pascal longjump function.
Date: Wed, 18 Dec 2013 15:02:00 -0000 [thread overview]
Message-ID: <87vbymmcck.fsf@fleche.redhat.com> (raw)
In-Reply-To: <5512.41819416663$1387235536@news.gmane.org> (Pierre Muller's message of "Tue, 17 Dec 2013 00:11:48 +0100")
>>>>> "Pierre" == Pierre Muller <pierre.muller@ics-cnrs.unistra.fr> writes:
Pierre> I suspect that it would at least require some init_abi function
Pierre> to set this... But then the question is, how do we recognize
Pierre> such executables...
You'll at least need different code to extract the target PC from the
jump buffer.
Tom> What about PC mangling?
Pierre> I am not sure what you mean here...
Pierre> There is no operation on pc value.
On some platforms glibc mangles the PC value that is saved in the
buffer.
Tom> and why is it not just
Tom> a simple wrapper for the C library longjmp?
Pierre> Because, by default, Free Pascal compiler generates code that is
Pierre> independent of any library (static code on Linux for instance)
Pierre> with only direct calls to System Calls.
Makes sense. I guess some deeper change is needed, not just adding
fpc_longjmp to the list.
Tom
next prev parent reply other threads:[~2013-12-18 15:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <37888.8297280811$1386971648@news.gmane.org>
2013-12-16 21:48 ` Tom Tromey
2013-12-16 23:12 ` Pierre Muller
[not found] ` <5512.41819416663$1387235536@news.gmane.org>
2013-12-18 15:02 ` Tom Tromey [this message]
2013-12-13 21:53 Pierre Muller
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