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| <?xml version="1.0" encoding="UTF-8"?> | ||
| <projectDescription> | ||
| <name>TestDlopen</name> | ||
| <comment></comment> | ||
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| libcalc.so: lib_calc.o | ||
| gcc -o libcalc.so lib_calc.c lib_calc.h -fPIC -shared | ||
|
|
||
| TestDlopen: TestDlopen.c | ||
| gcc -o TestDlopen TestDlopen.c -ldl | ||
|
|
||
| clean: | ||
| rm -rf *.so *.o *.gch TestDlopen |
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| /* | ||
| * TestDlopen.c | ||
| * | ||
| * Created on: Dec 8, 2016 | ||
| * Author: root | ||
| */ | ||
|
|
||
| #include<dlfcn.h> | ||
| #include<string.h> | ||
| #include<signal.h> | ||
| #include<unistd.h> | ||
|
|
||
| void (*fp_swap)(int*, int *); | ||
|
|
||
| int main(int argc, char **argv) | ||
| { | ||
| void *dl_hdl = NULL; | ||
| int x = 8, y = 10; | ||
| dl_hdl = dlopen("./libcalc.so", RTLD_LAZY); | ||
| fp_swap = dlsym(dl_hdl, "swap"); | ||
|
|
||
| printf("before swap: x = %d, y = %d\n", x, y); | ||
| fp_swap(&x, &y); | ||
| printf("after swap: x = %d, y = %d\n", x, y); | ||
|
|
||
| dlclose(dl_hdl); | ||
| return 0; | ||
| } | ||
|
|
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| /* | ||
| * lib_calc.c | ||
| * | ||
| * Created on: Dec 8, 2016 | ||
| * Author: root | ||
| */ | ||
| #include <stdio.h> | ||
| #include "lib_calc.h" | ||
|
|
||
| void swap(int *x, int *y) | ||
| { | ||
| printf("enter swap of dynamic library......\n"); | ||
| int temp = *x; | ||
| *x = *y; | ||
| *y = temp; | ||
| } | ||
|
|
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| /* | ||
| * lib_calc.h | ||
| * | ||
| * Created on: Dec 8, 2016 | ||
| * Author: root | ||
| */ | ||
|
|
||
| #ifndef LIB_CALC_H_ | ||
| #define LIB_CALC_H_ | ||
|
|
||
| void swap(int *, int *); | ||
|
|
||
| #endif /* LIB_CALC_H_ */ |