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42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
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/*
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* Compile with (on x86_64 archs):
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* gcc -m32 -DV1 -shared -o test21_v1.so test21.c
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* gcc -m32 -DV2 -shared -o test21_v2.so test21.c
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* gcc -m32 -o test21 test21.c -ldl -Wl,-z,origin,-rpath='$ORIGIN'
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*/
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#if defined(V1)
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int __attribute__((noinline)) getVersion() { asm(""); return 1; }
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int acquireVersion() { return getVersion(); }
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#elif defined(V2)
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int __attribute__((noinline)) getVersion() { asm(""); return 2; }
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int returnVersion() { return getVersion(); }
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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typedef int(*iFv_t)(void);
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int main(int argc, char **argv) {
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void* v1 = dlopen("test21_v1.so", RTLD_NOW);
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void* v2 = dlopen("test21_v2.so", RTLD_NOW);
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if(!v1 || !v2) {
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printf("Error openning libs: v1=%p, v2=%p\n", v1, v2);
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exit(-1);
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}
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iFv_t returnVersion = (iFv_t)dlsym(v2, "returnVersion");
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iFv_t acquireVersion = (iFv_t)dlsym(v1, "acquireVersion");
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if(!returnVersion || !acquireVersion) {
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printf("Error getting symbol return=%p/acquire=%p\n", returnVersion, acquireVersion);
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exit(-2);
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}
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printf("%d/%d\n", returnVersion(), acquireVersion()); return 0;
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dlclose(v2);
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dlclose(v1);
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}
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#endif
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