Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.c > #125927
| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Toy code for currency handling |
| Date | 2018-01-29 18:29 +1300 |
| Message-ID | <fd7pqfFnvamU3@mid.individual.net> (permalink) |
| References | (8 earlier) <2aaf1f7f-89f3-4356-9117-cc1aae7e5143@googlegroups.com> <JDkbC.442765$p_5.359784@fx05.am4> <01785de0-4f3a-484f-8f0b-329df9d7cbab@googlegroups.com> <F9mbC.938921$g_1.442428@fx35.am4> <sh8t6d53drbs574ji4e0ogom5s3a8ta3jn@4ax.com> |
On 01/29/2018 06:23 PM, Robert Wessel wrote:
> On Sun, 28 Jan 2018 15:40:43 +0000, bartc <bc@freeuk.com> wrote:
>
>> On 28/01/2018 14:43, fir wrote:
>>> W dniu niedziela, 28 stycznia 2018 14:56:10 UTC+1 u?ytkownik Bart napisa?:
>>>>
>>>> I think the problem is that object formats don't have the connection
>>>> between import library name and import function name. All function names
>>>> must exist in a single global namespace.
>>>>
>>>> --
>>>> bartc
>>>
>>> no i was told you - object formats not only have that connection but this is obligatory (afair) i mean any object has that connection - so on binary level it is ok
>>> [check the import table specification it contains a way to encode module names then list of function names for each module]
>>
>> I don't think that's the case. Start with this program:
>>
>> #include <windows.h>
>>
>> int main(void) {
>> MessageBox(0,"hello","there",0);
>> }
>>
>> and compile to object format.
>>
>> MessageBoxA() is a function inside USER32.DLL. But there is no mention
>> of that DLL in the source code (not in windows.h). And there is no
>> mention of it in the object file.
>>
>> In the object file (from compiling with gcc), there is
>> "__imp__MessageBoxA@16" (32-bit) or "__imp_MessageBoxA" (64-bit), but no
>> owner module.
>>
>> (With my C compiler, the object file contains "MessageBoxA" (64-bit),
>> un-decorated; it still works. So what's the __imp_/__imp__ all about?)
>>
>> Anyway, it's the job of the linker to find which DLL contains MessageBoxA.
>
>
> No it's not. The linker will find MessageBoxA() in the import library
> user32.lib. The import library contains the specification of where
> MessageBoxA() is.
>
> Without the __declspec(dllimport) the compiler will just generate call
> to MessageBoxA:
>
> call MessageBoxA
>
> and the linker will create a thunk for that that contains one indirect
> jump:
>
> MessageBoxA: jmp drowd ptr __imp_MessageBoxA
>
> (Note: I've ignored some decorations on the above for simplicity.)
Why does windows make this stuff so hard? No wonder poor old bartc gets
confused.
--
Ian.
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar
Re: Toy code for currency handling David Thompson <dave.thompson2@verizon.net> - 2018-01-21 11:53 -0500
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-21 11:44 -0800
Re: Toy code for currency handling Keith Thompson <kst-u@mib.org> - 2018-01-21 12:24 -0800
Re: Toy code for currency handling herrmannsfeldt@gmail.com - 2018-01-23 21:03 -0800
Re: Toy code for currency handling Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-01-24 15:02 +0000
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-24 08:45 -0800
Re: Toy code for currency handling Keith Thompson <kst-u@mib.org> - 2018-01-24 11:40 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-24 14:52 -0600
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-24 13:05 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-24 13:12 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-25 01:04 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-24 19:17 -0600
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-24 17:33 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-25 12:14 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 04:31 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-25 13:03 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 05:28 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 05:37 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 05:43 -0800
Re: Toy code for currency handling mark.bluemel@gmail.com - 2018-01-25 05:57 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-25 15:48 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 08:32 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 10:56 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-25 21:28 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 15:10 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 06:14 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 06:38 -0800
Re: Toy code for currency handling gordonb.ma9h0@burditt.org (Gordon Burditt) - 2018-01-24 21:53 -0600
Re: Toy code for currency handling scott@slp53.sl.home (Scott Lurndal) - 2018-01-25 18:05 +0000
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-25 18:16 +0000
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-26 07:30 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-25 22:08 +0000
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-26 20:00 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-26 11:31 +0000
Re: Toy code for currency handling scott@slp53.sl.home (Scott Lurndal) - 2018-01-26 15:51 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-26 10:32 -0600
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-26 08:50 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-26 13:11 -0600
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-26 18:32 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-26 13:07 -0600
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-27 09:43 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-26 21:44 +0000
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-27 11:02 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-27 00:46 +0000
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-28 09:19 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-27 21:19 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-27 14:14 -0800
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-28 11:21 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-27 22:32 +0000
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-28 12:16 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-28 00:44 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 04:13 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-28 13:56 +0000
Re: Toy code for currency handling Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-01-28 06:12 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 06:43 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-28 15:40 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 07:56 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-28 16:12 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 08:34 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-28 16:53 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 09:30 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 09:48 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-28 23:23 -0600
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-29 18:29 +1300
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-28 23:45 -0600
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-29 19:54 +1300
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-29 01:38 -0600
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-29 20:56 +1300
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-29 20:34 -0600
Re: Toy code for currency handling "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-01-29 21:46 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-28 23:34 -0600
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-29 12:02 +0000
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-29 12:33 +0000
Re: Toy code for currency handling Richard Damon <Richard@Damon-Family.org> - 2018-01-29 08:30 -0500
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-29 14:08 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-29 19:36 -0600
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-30 11:49 +0000
Re: Toy code for currency handling already5chosen@yahoo.com - 2018-01-30 04:45 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-30 13:04 +0000
Re: Toy code for currency handling already5chosen@yahoo.com - 2018-01-30 05:17 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-30 14:23 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-30 11:39 -0600
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-30 18:23 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-30 18:25 -0600
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-31 07:56 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-31 12:56 -0600
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-31 13:09 -0800
Re: Toy code for currency handling scott@slp53.sl.home (Scott Lurndal) - 2018-01-31 21:35 +0000
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-31 16:45 -0800
Re: Toy code for currency handling David Brown <david.brown@hesbynett.no> - 2018-02-01 08:59 +0100
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-02-01 02:40 -0600
Re: Toy code for currency handling David Brown <david.brown@hesbynett.no> - 2018-02-01 10:13 +0100
Re: Toy code for currency handling scott@slp53.sl.home (Scott Lurndal) - 2018-02-01 14:49 +0000
Re: Toy code for currency handling David Brown <david.brown@hesbynett.no> - 2018-02-01 16:13 +0100
Re: Toy code for currency handling supercat@casperkitty.com - 2018-02-01 09:05 -0800
Re: Toy code for currency handling David Brown <david.brown@hesbynett.no> - 2018-02-01 22:07 +0100
Re: Toy code for currency handling supercat@casperkitty.com - 2018-02-01 15:49 -0800
Re: Toy code for currency handling David Brown <david.brown@hesbynett.no> - 2018-02-02 13:13 +0100
Re: Toy code for currency handling already5chosen@yahoo.com - 2018-01-30 05:30 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-30 10:48 -0600
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-29 12:59 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-29 20:26 -0600
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-29 20:36 -0600
Re: Toy code for currency handling mark.bluemel@gmail.com - 2018-01-30 00:34 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-30 11:33 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-30 11:49 -0600
Re: Toy code for currency handling jameskuyper@verizon.net - 2018-01-30 12:03 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-30 17:40 -0600
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-30 12:56 +0000
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-30 11:28 -0600
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-31 19:19 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 04:16 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-28 13:40 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 06:35 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 07:24 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-28 15:24 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-28 07:44 -0800
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-29 18:34 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-29 12:21 +0000
Re: Toy code for currency handling Ian Collins <ian-news@hotmail.com> - 2018-01-30 07:59 +1300
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-29 19:56 +0000
Re: Toy code for currency handling scott@slp53.sl.home (Scott Lurndal) - 2018-01-29 20:53 +0000
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-29 21:52 +0000
Re: Toy code for currency handling Richard Damon <Richard@Damon-Family.org> - 2018-01-27 18:32 -0500
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-27 13:22 -0600
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-26 13:23 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-26 13:41 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-26 14:12 -0800
Re: Toy code for currency handling bartc <bc@freeuk.com> - 2018-01-26 22:23 +0000
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-26 14:44 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-26 15:28 -0800
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-26 16:22 -0800
Re: Toy code for currency handling David Brown <david.brown@hesbynett.no> - 2018-01-25 09:11 +0100
Re: Toy code for currency handling fir <profesor.fir@gmail.com> - 2018-01-25 02:27 -0800
Re: Toy code for currency handling Robert Wessel <robertwessel2@yahoo.com> - 2018-01-24 15:23 -0600
Re: Toy code for currency handling Keith Thompson <kst-u@mib.org> - 2018-01-24 14:29 -0800
Re: Toy code for currency handling supercat@casperkitty.com - 2018-01-24 14:49 -0800
csiph-web