Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT sources DOT redhat DOT com
Delivered-To: mailing list cygwin AT sources DOT redhat DOT com
Message-ID: <20010723223138.91617.qmail@web13901.mail.yahoo.com>
Date: Mon, 23 Jul 2001 15:31:38 -0700 (PDT)
From: "Justin K. M. Sowers" <jickums AT yahoo DOT com>
Reply-To: jsowers AT alum DOT mit DOT edu
Subject: Building a dll for a RIM pager - any ideas?
To: cygwin AT sources DOT redhat DOT com
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

Hello Cygwin.

I have been trying to build a hello world dll for my RIM pager (that's how you
send apps to the little 386-brained gadget) and the compilation has been going
great.  However, the dll does not seem to look and smell like the dll the
device is expecting so it won't get past the loader and onto the machine.  I
have objdump-ed the sample dlls built with VC++ and seen a few differences.  I
do not link in cygwin.dll or mingw32 (the gizmo has it's own stdlibs).

My dllwrap invocation looks like:
//c/cygwin/bin/dllwrap.exe --target=i386 --image-base 0x10000000
--entry=_PagerMain --verbose --machine i386 --no-idata4 --no-idata5
--export-all-symbols --def ./HelloWorld.def --driver-flags '-mi386
-nostartfiles -nostdlib -Wl,--dll -Wl,--traditional-format
-Wl,--discard-locals -Wl,--entry=_PagerMain -Wl,--file-alignment,0x1000
-Wl,--heap,0x100000 -Wl,--stack,0x100000' --dllname HelloWorld.dll 

My HelloWorld:

HelloWorld.dll:     file format pei-i386
HelloWorld.dll
architecture: i386, flags 0x00000133:
HAS_RELOC, EXEC_P, HAS_SYMS, HAS_LOCALS, D_PAGED
start address 0x100011c0

Characteristics 0x2206
	executable
	line numbers stripped
	debugging information removed
	DLL

...My section names are very different...
Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         00001000  10001000  10001000  00001000  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE, DATA
  1 .data         00001000  10002000  10002000  00002000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  2 .rimdep       00001000  10003000  10003000  00003000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  3 .version      00001000  10004000  10004000  00004000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  4 .bss          00000010  10005000  10005000  00000000  2**2
                  ALLOC
  5 .edata        00001000  10006000  10006000  00005000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  6 .idata        00001000  10007000  10007000  00006000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  7 .CRT          00001000  10008000  10008000  00007000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  8 .reloc        00001000  10009000  10009000  00008000  2**2
                  CONTENTS, ALLOC, LOAD, DATA



Their App built with MSVC++:

sparrow20.dll:     file format pei-i386
sparrow20.dll
architecture: i386, flags 0x0000010b:
HAS_RELOC, EXEC_P, HAS_DEBUG, D_PAGED
start address 0x10001000

Characteristics 0x210e
	executable
	line numbers stripped
	symbols stripped
	32 bit words  <===== mine doesn't have this - what flags do I feed ld?
	DLL

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         0000c600  10001000  10001000  00000400  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .rdata        00005400  1000e000  1000e000  0000ca00  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  2 .data         00000200  10014000  10014000  00011e00  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  3 .version      00000200  10015000  10015000  00012000  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  4 .rimdep       00000200  10016000  10016000  00012200  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  5 .reloc        00001e00  10017000  10017000  00012400  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA, DEBUGGING

Any ideas on how to make my dll more like what VC++ spits out.  I don't have a
binary spec from the RIM pagers designers, and they only sanction the use of
their SDK headers and dlls with VC++ 5.0 and beyond so I'm getting very little
help there...

-Justin.

__________________________________________________
Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/