X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type :content-transfer-encoding; q=dns; s=default; b=y6Q4+XnNXZPvvfkf H3ydJFbts0Dwbq9scKT9NSuJHPc4AzuhdaLhy5mjIZHoFwqinuPPRLW/DuJTyn/I tqitZJr45P6S0u0IqxASdA8I0kOhZ7GWL9Tn/j23ay+PuIFnJHEW0fibYZaPXPUm pScjjXz/AM/T5u/ZrSxAmiAmpgA= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type :content-transfer-encoding; s=default; bh=XZoCzOkdu3S+z/1feXbWij OY9RM=; b=H+qvm5A6YRcxMNW/iO8GBVlSsdQwzfxZIERXDy6mTckNLHpt1T3wxz jpEKXAWO7HQq+qqNHmby4ZCuO/wxockSi5HlSgMLiF42yCrl8eNw7lZ3gtd+vfnk Zr2gR9/xaJPLbitTUfSOPjkZG88rwDlP0+OOYL5kEHbWe8InWMh6k= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.3 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mail-pa0-f53.google.com MIME-Version: 1.0 X-Received: by 10.70.90.4 with SMTP id bs4mr3659794pdb.38.1411501977114; Tue, 23 Sep 2014 12:52:57 -0700 (PDT) In-Reply-To: <5421CCA1.6000502@gmail.com> References: <5421CCA1 DOT 6000502 AT gmail DOT com> Date: Tue, 23 Sep 2014 16:52:57 -0300 Message-ID: Subject: Re: problem with dlsym to fetch address of some functions From: =?UTF-8?Q?Paulo_C=C3=A9sar_Pereira_de_Andrade?= To: cygwin AT cygwin DOT com Content-Type: text/plain; charset=UTF-8 X-IsSubscribed: yes Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id s8NJrG6v023328 2014-09-23 16:40 GMT-03:00 Marco Atzeri : > On 23/09/2014 20:43, Paulo César Pereira de Andrade wrote: >> >> Hi, >> >> Forgive me if this is expected. I am probably abusing dlsym >> behavior on other systems. > > > It will be much more clear if you Sorry for not clear initial problem description. > 1) produce a simple small complete test case, $ cat x.c extern int sprintf(char*,char*, ...); extern int puts(char*); extern void *dlsym(void*, char*); char buff[128]; int main(void) { int (*fn)(char*,char*,...); sprintf(buff, "%.1f", 1.0); puts(buff); fn = dlsym((void*)0, "sprintf"); (*fn)(buff, "%.1f", 1.0); puts(buff); return 0; } $ gcc -O0 -g3 x.c > 2) explain the outcome you obtain (or not) $ ./a.exe 1.0 f > 3) explain the result you are expecting. The expected result would be: $ ./a.exe 1.0 1.0 > I had difficulties to understand what you are asking us. > > Marco Thanks, Paulo > -- > Problem reports: http://cygwin.com/problems.html > FAQ: http://cygwin.com/faq/ > Documentation: http://cygwin.com/docs.html > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple