Hello All At Wine-Devel!
I am trying to convert a win32 DLL to a unix SO.
The dll named if32dt is basically a wrapper over the serial port, interfacing some custom hardware. It is therefore a driver to the custom hw.
This is part of a project to port a windows sales app to linux.
There are about 6 DLLs with similar structure and my aim is to show my superiors that using winelib is much better than simply rewriting the DLL to use unix system calls.
1) I have sucessfully copied my project over to unix and built the so file The project is basicaly a couple of headers and the c file ifdt32.cpp
bash# cd ifdt32/ bash# mv ifdt32.cpp ifdt32.c #the file is plain C , cpp was confusing gcc bash# winemaker --nomfc -imsvcrt.dll -I/usr/local/include/wine/msvcrt --dll . bash# ./configure bash# make bash# make install
The DLL uses msvcrt so I added it. => I read some issues between msvcrt and crt in winehq.com
After changing a couple lines of ifdt.c I was able to build libifdt.so .
I had a lot of warnings like ifdt32.c:176: warning: comparison between pointer and integer
My ifdt32.spec file is unchanged from what winemaker created name ifdt32 type win32 mode dll init DllMain
import msvcrt.dll import advapi32.dll import comdlg32.dll import gdi32.dll import kernel32.dll import ntdll.dll import odbc32.dll import ole32.dll import oleaut32.dll import shell32.dll import user32.dll import winspool.drv
ifdt32.c only uses msvcrt.dll, ntdll.dll , kernel32.dll, user32.dll
I added simple printf calls to DllMain to see if it was being called when the SO is loaded
make install correctly put libifdt.so in /usr/local/lib
I ran ldconfig in /usr/local/lib with bash# ldconfig -v -n . libifdt32.so -> libifdt32.so libwine_unicode.so -> libwine_unicode.so.1.0 libwine_tsx11.so -> libwine_tsx11.so.1.0 libwine.so -> libwine.so.1.0
2) I created a trivial program to test libifdt.so
bash# cat test.c #include "windows.h" #include "stdio.h" #include "stdlib.h" #include "string.h" #include "io.h" #include "conio.h" #include "fcntl.h" #include "direct.h" #include "time.h" #include "IFfunc32.h"
printf("before start");
int main(void) {
printf("before start"); if( IF_IFDT32_OPEN("COM2") == 0 ) { printf("We are working") ;
} else { printf("Oh no!"); }
}
bash# make gcc -g -c test.c -I/usr/local/include/wine -I/usr/local/include/wine/msvcrt -I/home/nwine/ifdt32/ifdt32 gcc -o test test.o -lifdt32 -L/usr/local/lib This program seg faults. I have not been able to debug it with winedbg, it simply hangs with message "Starting with pid 0"
bash# gdb test (gdb) b 1 Breakpoint 1 at 0x8048556: file test.c, line 1. (gdb) r Starting program: /home/nwine/ifdt32/test/test Breakpoint 1, main () at test.c:15 15 printf("before start"); (gdb) n Program received signal SIGSEGV, Segmentation fault. 0x400387cb in dllname () from /usr/local/lib/libifdt32.so (gdb) bt #0 0x400387cb in dllname () from /usr/local/lib/libifdt32.so #1 0x8048563 in main () at test.c:15 #2 0x40057f9b in __libc_start_main () from /lib/libc.so.6 (gdb) p dllname $1 = "ifdt32" In this trace, it seems that a function named dllname is causing a segfault There is a string named dllname and it's contents are correct
I think the winelib initialisation code has not been correctly called For example: the Dllmain function to start the DLL has not been called
I have tried a great many things to work around this problem with no success.
It is hard to debug because the seg fault happens very early and I havent been able to get winedbg to work.
I have tried this on wine-20020509 and wine-20020122 with exactly the same problem.
Thanks a lot for any help or pointers.
Miguel Feitosa Sao Paulo - Brasil
P.S> output of bash# ldd ifdt.dll libwine.so => /usr/local/lib/libwine.so (0x40010000) libwine_unicode.so => /usr/local/lib/libwine_unicode.so (0x40026000) libm.so.6 => /lib/libm.so.6 (0x40103000) libc.so.6 => /lib/libc.so.6 (0x40125000) libdl.so.2 => /lib/libdl.so.2 (0x40245000) /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x2aaaa000)
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