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59 lines
1.5 KiB
59 lines
1.5 KiB
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/* Code to test runtime linking functionality.
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* Load a shared object at runtime and verify that arguments passed to
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* and from a function that is dynamically looked up make sense.
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* This tests that (a) dynamic linking works at all (otherwise all the dl*
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* functions don't work) and (b) the dynamic loading functionality works
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* and (c) the PLT is sane and calling convention makes sense.
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*
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* We have to pass an absolute path to dlopen() for which we rely on
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* the test run script.
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*
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* The module we load is in mod.c.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <dlfcn.h>
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int max_error = 2;
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#include "common.h"
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#include "magic.h"
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int main (int argc, char *argv[])
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{
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void *dlhandle;
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long (*modf) (long, long *, long);
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long v, *cookie = NULL, cookie2 = 0;
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start(63);
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if(argc != 2) {
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fprintf(stderr, "Usage: %s <module>\n", argv[0]);
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exit(1);
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}
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if(!(dlhandle = dlopen(argv[1], RTLD_LAZY))) e(1);
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if(!(modf = dlsym(dlhandle, "modfunction"))) e(2);
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if(!(cookie = (long *) dlsym(dlhandle, "cookie"))) e(3);
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if(*cookie == MAGIC2) { fprintf(stderr, "cookie already set\n"); e(4); }
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if(cookie2 == MAGIC3) { fprintf(stderr, "cookie2 already set\n"); e(5); }
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v = modf(MAGIC4, &cookie2, MAGIC5);
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if(v != MAGIC1) { fprintf(stderr, "return value wrong\n"); e(9); }
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if(*cookie != MAGIC2) { fprintf(stderr, "cookie set wrongly\n"); e(6); }
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if(cookie2 != MAGIC3) { fprintf(stderr, "cookie2 set wrongly\n"); e(7); }
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dlclose(dlhandle);
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if(v != MAGIC1) { fprintf(stderr, "wrong return value.\n"); e(8); }
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quit();
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return(0);
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}
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