* Re: .lib files to .a
@ 1999-02-22 17:59 Suhaib M. Siddiqi
1999-02-28 23:02 ` Suhaib M. Siddiqi
0 siblings, 1 reply; 6+ messages in thread
From: Suhaib M. Siddiqi @ 1999-02-22 17:59 UTC (permalink / raw)
To: Russell K. Thompson II, cygwin list
Do you really have to for glut37 and Opengl? There is a Cygwin port
available for download at http://www.i21.com/~tjump
-----Original Message-----
From: Russell K. Thompson II <rkthomps@students.uwf.edu>
To: cygwin list <cygwin@sourceware.cygnus.com>
Date: Monday, February 22, 1999 7:42 PM
Subject: .lib files to .a
> I know there is a section on this topic on the FAQ however I do not
>fully understand it. I want to convert the .lib files for glut and
>opengl. I tried a method I found searching the list archive but it did
>not work for me. It suggested using nm to create a .def file and then
>using dlltool to create the library file. But when I tried this I got
>syntax errors from dlltool.
>
>--
>Want to unsubscribe from this list?
>Send a message to cygwin-unsubscribe@sourceware.cygnus.com
>
>
--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe@sourceware.cygnus.com
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: .lib files to .a 1999-02-22 17:59 .lib files to .a Suhaib M. Siddiqi @ 1999-02-28 23:02 ` Suhaib M. Siddiqi 0 siblings, 0 replies; 6+ messages in thread From: Suhaib M. Siddiqi @ 1999-02-28 23:02 UTC (permalink / raw) To: Russell K. Thompson II, cygwin list Do you really have to for glut37 and Opengl? There is a Cygwin port available for download at http://www.i21.com/~tjump -----Original Message----- From: Russell K. Thompson II <rkthomps@students.uwf.edu> To: cygwin list <cygwin@sourceware.cygnus.com> Date: Monday, February 22, 1999 7:42 PM Subject: .lib files to .a > I know there is a section on this topic on the FAQ however I do not >fully understand it. I want to convert the .lib files for glut and >opengl. I tried a method I found searching the list archive but it did >not work for me. It suggested using nm to create a .def file and then >using dlltool to create the library file. But when I tried this I got >syntax errors from dlltool. > >-- >Want to unsubscribe from this list? >Send a message to cygwin-unsubscribe@sourceware.cygnus.com > > -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com ^ permalink raw reply [flat|nested] 6+ messages in thread
* .lib files to .a @ 1999-02-22 16:45 Russell K. Thompson II 1999-02-23 3:31 ` Gary V. Vaughan 1999-02-28 23:02 ` Russell K. Thompson II 0 siblings, 2 replies; 6+ messages in thread From: Russell K. Thompson II @ 1999-02-22 16:45 UTC (permalink / raw) To: cygwin list I know there is a section on this topic on the FAQ however I do not fully understand it. I want to convert the .lib files for glut and opengl. I tried a method I found searching the list archive but it did not work for me. It suggested using nm to create a .def file and then using dlltool to create the library file. But when I tried this I got syntax errors from dlltool. -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: .lib files to .a 1999-02-22 16:45 Russell K. Thompson II @ 1999-02-23 3:31 ` Gary V. Vaughan 1999-02-28 23:02 ` Gary V. Vaughan 1999-02-28 23:02 ` Russell K. Thompson II 1 sibling, 1 reply; 6+ messages in thread From: Gary V. Vaughan @ 1999-02-23 3:31 UTC (permalink / raw) To: Russell K. Thompson II; +Cc: cygwin list "Russell K. Thompson II" wrote: > > I know there is a section on this topic on the FAQ however I do not > fully understand it. I want to convert the .lib files for glut and > opengl. I tried a method I found searching the list archive but it did > not work for me. It suggested using nm to create a .def file and then > using dlltool to create the library file. But when I tried this I got > syntax errors from dlltool. I am in the process of enhancing libtool so that it can create a def file and cygwin .a library on the fly for linking dlls (i.e. you don't even need the .lib file). The guts of this process is a short program adapted from DJ Delories similar work for gld which I have attached. Compile the attached program and run it with the dll as an argument and redirect the output to a file, say opengl.def, and then use dlltool as follows: dlltool --dllname /path/to/opengl.dll --def /path/to/opengl.def \ --output-lib opengl.a When you link a program with the newly created import library (.a file), it will load the associated dll when it is executed. Please report any problems to me if you have an interest in seeing this work in an upcoming release of libtool... Cheers, Gary V. Vaughan #include <stdio.h> /* for printf() */ #include <unistd.h> /* for open(), lseek(), read() */ #include <fcntl.h> /* for O_RDONLY, O_BINARY */ #include <string.h> /* for strdup() */ static unsigned int pe_get16 (fd, offset) int fd; int offset; { unsigned char b[2]; lseek (fd, offset, SEEK_SET); read (fd, b, 2); return b[0] + (b[1]<<8); } static unsigned int pe_get32 (fd, offset) int fd; int offset; { unsigned char b[4]; lseek (fd, offset, SEEK_SET); read (fd, b, 4); return b[0] + (b[1]<<8) + (b[2]<<16) + (b[3]<<24); } static unsigned int pe_as32 (ptr) void *ptr; { unsigned char *b = ptr; return b[0] + (b[1]<<8) + (b[2]<<16) + (b[3]<<24); } int main (argc, argv) int argc; char *argv[]; { int dll; unsigned long pe_header_offset, opthdr_ofs, num_entries, i; unsigned long export_rva, export_size, nsections, secptr, expptr; unsigned long name_rvas, nexp; unsigned char *expdata, *erva; char *filename, *dll_name; filename = argv[1]; dll = open(filename, O_RDONLY|O_BINARY); if (!dll) return 1; dll_name = filename; for (i=0; filename[i]; i++) if (filename[i] == '/' || filename[i] == '\\' || filename[i] == ':') dll_name = filename + i +1; pe_header_offset = pe_get32 (dll, 0x3c); opthdr_ofs = pe_header_offset + 4 + 20; num_entries = pe_get32 (dll, opthdr_ofs + 92); if (num_entries < 1) /* no exports */ return 1; export_rva = pe_get32 (dll, opthdr_ofs + 96); export_size = pe_get32 (dll, opthdr_ofs + 100); nsections = pe_get16 (dll, pe_header_offset + 4 +2); secptr = (pe_header_offset + 4 + 20 + pe_get16 (dll, pe_header_offset + 4 + 16)); expptr = 0; for (i = 0; i < nsections; i++) { char sname[8]; unsigned long secptr1 = secptr + 40 * i; unsigned long vaddr = pe_get32 (dll, secptr1 + 12); unsigned long vsize = pe_get32 (dll, secptr1 + 16); unsigned long fptr = pe_get32 (dll, secptr1 + 20); lseek(dll, secptr1, SEEK_SET); read(dll, sname, 8); if (vaddr <= export_rva && vaddr+vsize > export_rva) { expptr = fptr + (export_rva - vaddr); if (export_rva + export_size > vaddr + vsize) export_size = vsize - (export_rva - vaddr); break; } } expdata = (unsigned char*)malloc(export_size); lseek (dll, expptr, SEEK_SET); read (dll, expdata, export_size); erva = expdata - export_rva; nexp = pe_as32 (expdata+24); name_rvas = pe_as32 (expdata+32); printf ("EXPORTS\n"); for (i = 0; i<nexp; i++) { unsigned long name_rva = pe_as32 (erva+name_rvas+i*4); printf ("\t%s @ %ld ;\n", erva+name_rva, 1+ i); } return 0; } ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: .lib files to .a 1999-02-23 3:31 ` Gary V. Vaughan @ 1999-02-28 23:02 ` Gary V. Vaughan 0 siblings, 0 replies; 6+ messages in thread From: Gary V. Vaughan @ 1999-02-28 23:02 UTC (permalink / raw) To: Russell K. Thompson II; +Cc: cygwin list "Russell K. Thompson II" wrote: > > I know there is a section on this topic on the FAQ however I do not > fully understand it. I want to convert the .lib files for glut and > opengl. I tried a method I found searching the list archive but it did > not work for me. It suggested using nm to create a .def file and then > using dlltool to create the library file. But when I tried this I got > syntax errors from dlltool. I am in the process of enhancing libtool so that it can create a def file and cygwin .a library on the fly for linking dlls (i.e. you don't even need the .lib file). The guts of this process is a short program adapted from DJ Delories similar work for gld which I have attached. Compile the attached program and run it with the dll as an argument and redirect the output to a file, say opengl.def, and then use dlltool as follows: dlltool --dllname /path/to/opengl.dll --def /path/to/opengl.def \ --output-lib opengl.a When you link a program with the newly created import library (.a file), it will load the associated dll when it is executed. Please report any problems to me if you have an interest in seeing this work in an upcoming release of libtool... Cheers, Gary V. Vaughan #include <stdio.h> /* for printf() */ #include <unistd.h> /* for open(), lseek(), read() */ #include <fcntl.h> /* for O_RDONLY, O_BINARY */ #include <string.h> /* for strdup() */ static unsigned int pe_get16 (fd, offset) int fd; int offset; { unsigned char b[2]; lseek (fd, offset, SEEK_SET); read (fd, b, 2); return b[0] + (b[1]<<8); } static unsigned int pe_get32 (fd, offset) int fd; int offset; { unsigned char b[4]; lseek (fd, offset, SEEK_SET); read (fd, b, 4); return b[0] + (b[1]<<8) + (b[2]<<16) + (b[3]<<24); } static unsigned int pe_as32 (ptr) void *ptr; { unsigned char *b = ptr; return b[0] + (b[1]<<8) + (b[2]<<16) + (b[3]<<24); } int main (argc, argv) int argc; char *argv[]; { int dll; unsigned long pe_header_offset, opthdr_ofs, num_entries, i; unsigned long export_rva, export_size, nsections, secptr, expptr; unsigned long name_rvas, nexp; unsigned char *expdata, *erva; char *filename, *dll_name; filename = argv[1]; dll = open(filename, O_RDONLY|O_BINARY); if (!dll) return 1; dll_name = filename; for (i=0; filename[i]; i++) if (filename[i] == '/' || filename[i] == '\\' || filename[i] == ':') dll_name = filename + i +1; pe_header_offset = pe_get32 (dll, 0x3c); opthdr_ofs = pe_header_offset + 4 + 20; num_entries = pe_get32 (dll, opthdr_ofs + 92); if (num_entries < 1) /* no exports */ return 1; export_rva = pe_get32 (dll, opthdr_ofs + 96); export_size = pe_get32 (dll, opthdr_ofs + 100); nsections = pe_get16 (dll, pe_header_offset + 4 +2); secptr = (pe_header_offset + 4 + 20 + pe_get16 (dll, pe_header_offset + 4 + 16)); expptr = 0; for (i = 0; i < nsections; i++) { char sname[8]; unsigned long secptr1 = secptr + 40 * i; unsigned long vaddr = pe_get32 (dll, secptr1 + 12); unsigned long vsize = pe_get32 (dll, secptr1 + 16); unsigned long fptr = pe_get32 (dll, secptr1 + 20); lseek(dll, secptr1, SEEK_SET); read(dll, sname, 8); if (vaddr <= export_rva && vaddr+vsize > export_rva) { expptr = fptr + (export_rva - vaddr); if (export_rva + export_size > vaddr + vsize) export_size = vsize - (export_rva - vaddr); break; } } expdata = (unsigned char*)malloc(export_size); lseek (dll, expptr, SEEK_SET); read (dll, expdata, export_size); erva = expdata - export_rva; nexp = pe_as32 (expdata+24); name_rvas = pe_as32 (expdata+32); printf ("EXPORTS\n"); for (i = 0; i<nexp; i++) { unsigned long name_rva = pe_as32 (erva+name_rvas+i*4); printf ("\t%s @ %ld ;\n", erva+name_rva, 1+ i); } return 0; } ^ permalink raw reply [flat|nested] 6+ messages in thread
* .lib files to .a 1999-02-22 16:45 Russell K. Thompson II 1999-02-23 3:31 ` Gary V. Vaughan @ 1999-02-28 23:02 ` Russell K. Thompson II 1 sibling, 0 replies; 6+ messages in thread From: Russell K. Thompson II @ 1999-02-28 23:02 UTC (permalink / raw) To: cygwin list I know there is a section on this topic on the FAQ however I do not fully understand it. I want to convert the .lib files for glut and opengl. I tried a method I found searching the list archive but it did not work for me. It suggested using nm to create a .def file and then using dlltool to create the library file. But when I tried this I got syntax errors from dlltool. -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~1999-02-28 23:02 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 1999-02-22 17:59 .lib files to .a Suhaib M. Siddiqi 1999-02-28 23:02 ` Suhaib M. Siddiqi -- strict thread matches above, loose matches on Subject: below -- 1999-02-22 16:45 Russell K. Thompson II 1999-02-23 3:31 ` Gary V. Vaughan 1999-02-28 23:02 ` Gary V. Vaughan 1999-02-28 23:02 ` Russell K. Thompson II
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