Hi,
I am porting one Linux library.
This library loads other shared libraries(.so) using dlopen() , dlclose(),
dlsym().
So I have
1. loader-Lib.so
2. tobe-loaded-lib.so
written in C.
I am referring to tech note:
http://developer.apple.com/technotes/tn2002/tn2071.html
I want to convert both
1. loader-Lib.so
2. tobe-loaded-lib.so
to cocoa frameworks.
Number of tobe-loaded-lib.so libraries are not fixed. their paths are
supplied in one list.conf file.
I converted .so to Cocoa Frameworks.
loader-lib.framework contains the code I shown below.
As per tn2071.html dlopen() /dlclose()/ dlsym() should not be used.
So I am using NSModule.
But I am not able to load/link the tobe-loaded-lib.framework 's Mach-o
dynamic lib using this NSModule.
NSCreateObjectFileImageFromFile() returns -
NSObjectFileImageInappropriateFile.
I look in the <mach-o/dyld.h> for function
NSCreateObjectFileImageFromFile().
there is says this function is supported for only MH_BUNDLE type of Mach-o
files.
Limitation to me is I don't know how may frameworks are there to be loaded
at compile time.
I have to take path of frameworks from list.conf file.
How can I load the framework's shared library at runtime using C program and
execute its code?
Do I have to use some other APIs?
Here is the code i tried.
int
LoadLibrary()
{
/* 1 */
const char *filename =
"/Users/user1/Library/Frameworks/SDMLib.framework/Versions/Current/SDMLib";
/* 2 */
//const char *filename =
"/Users/user1/project/qlogic/test_fw/NSM/UseSDM/build/test.o";
/* I compile a test c file by gcc -bundle -o test.o test.c ,
this test.o gets loaded NSCreateObjectFileImageFromFile()
successfully.
*/
NSObjectFileImage *fileImage;
NSModule handle;
NSObjectFileImageReturnCode returnCode;
int result;
NSSymbol nssym;
void (*address)();
printf("Entered - %s()\n",__func__);
printf("File name = %s\n",filename);
returnCode = NSCreateObjectFileImageFromFile(filename, &fileImage);
switch (returnCode) {
case NSObjectFileImageSuccess:
printf("Return code = NSObjectFileImageSuccess\n");
break;
case NSObjectFileImageFailure:
printf("Return code = NSObjectFileImageFailure\n");
break;
case NSObjectFileImageInappropriateFile:
printf("Return code = NSObjectFileImageInappropriateFile\n");
break;
case NSObjectFileImageArch:
printf("Return code = NSObjectFileImageArch\n");
break;
case NSObjectFileImageFormat:
printf("Return code = NSObjectFileImageFormat\n");
break;
case NSObjectFileImageAccess:
printf("Return code = NSObjectFileImageAccess\n");
break;
default:
printf("Unkown return status\n");
break;
};
if(returnCode == NSObjectFileImageSuccess)
{
handle = NSLinkModule(fileImage,filename,
NSLINKMODULE_OPTION_RETURN_ON_ERROR | NSLINKMODULE_OPTION_PRIVATE);
if (handle) {
printf("Valid Handle - \n");
nssym = NSLookupSymbolInModule(handle, "test_display");
/* this doesn't work event for test.o */
address = NSAddressOfSymbol(nssym);
printf("Address = %p\n",address);
(*address)();
} else {
printf("INVALID HANDLE\n");
}
NSDestroyObjectFileImage(fileImage);
result = NSUnLinkModule(handle, 0);
}
printf("Leaving - %s()\n",__func__);
return 0;
}
Am I posting this message to correct mailing list?
If not please direct me to correct mailing list.
Regards,
Parav Pandit
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