Print Page - A good question on CRT startup library

Title: A good question on CRT startup library
Post by: ToutEnMasm on February 14, 2008, 02:25:40 PM

Hello,
How can be write in masm the same thing that the crt library do ?
That is:

masm source:

Quote
;.....
includelib MasmStartup.lib
.code
StartupMasm Proc
StartupMasm endp
..other proc
end

The thing I don't know how to write,that made the MasmStartup.lib

Quote
Some Idea for that ?

Title: Re: A good question on CRT startup library
Post by: drizz on February 14, 2008, 05:29:58 PM

It's as simple as declaring StartupMasm in MasmStartup.lib as extern,
and put entrypoint in MasmStartup.lib

Title: Re: A good question on CRT startup library
Post by: ToutEnMasm on February 14, 2008, 08:05:04 PM

Thanks,
It work

Title: Re: A good question on CRT startup library
Post by: ToutEnMasm on February 14, 2008, 08:50:28 PM

But.....
LINK : error LNK2001: unresolved external symbol _WinMainCRTStartup

How to avoid this,I have no use of libcmt.lib,at this time

Title: Re: A good question on CRT startup library
Post by: drizz on February 14, 2008, 11:06:30 PM

Yes, you can't call entrypoint "start:", you have to specify two labels mainCRTStartup & WinMainCRTStartup

Code Select

.686
.model flat,stdcall
option casemap:none
option proc:private
include kernel32.inc
includelib kernel32.lib

EXTERN STDCALL StartupMasm:PROTO STDCALL

.code

mainCRTStartup proc c public
	;SUBSYSTEM:CONSOLE
	invoke StartupMasm
	invoke ExitProcess,eax
mainCRTStartup endp

WinMainCRTStartup proc c public
	;SUBSYSTEM:WINDOWS
	invoke StartupMasm
	invoke ExitProcess,eax
WinMainCRTStartup endp

end

HtH

Title: Re: A good question on CRT startup library
Post by: ToutEnMasm on February 15, 2008, 07:24:36 AM

Ok,
Like that it's work,thanks

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