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From: Colin Paul Gloster <Colin_Paul_Gloster@ACM.org>
Newsgroups: comp.lang.ada
Subject: Re: LLVM--Low Level Virtual Machine--and Ada
Date: 24 Jul 2007 09:50:03 GMT
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Date: 2007-07-24T09:50:03+00:00
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On 2007-07-24, Duncan Sands <baldrick@free.fr> wrote:

|-----------------------------------------------------------------------------|
|" Hi Randy,                                                                  |
|                                                                             |
|> Janus/Ada has never used any executable data/stack in its 32-bit versions; |
|> such code would save no more than a clock cycle or two (out of hundreds or |
|> thousands) and as such could not be significant. We use compiler-generated |
|> thunks rather than run-time generated trampolines, and I'm not sure why    |
|> anyone would use the latter (given that they increase the exploitability of|
|> a program). Most be something I don't understand...                        |
|                                                                             |
| how do these thunks work?                                                   |
|                                                                             |
| Thanks,                                                                     |
|                                                                             |
| Duncan."                                                                    |
|-----------------------------------------------------------------------------|

You should pay RR Software for a source code license to obtain that
information.

Regards,
Colin Paul Gloster