1 #include <stdio.h>
2 #include <stdlib.h>
3
4 #include <dlfcn.h>
5 #include <errno.h>
6 #include <sys/auxv.h>
7
8 #include <cpuinfo.h>
9
10 typedef unsigned long (*getauxval_function_t)(unsigned long);
11
main(int argc,char ** argv)12 int main(int argc, char** argv) {
13 void* libc = dlopen("libc.so", RTLD_NOW);
14 if (libc == NULL) {
15 fprintf(stderr, "Error: failed to load libc.so: %s\n", dlerror());
16 exit(EXIT_FAILURE);
17 }
18
19 getauxval_function_t getauxval = (getauxval_function_t)dlsym(libc, "getauxval");
20 if (getauxval == NULL) {
21 fprintf(stderr, "Error: failed to locate getauxval in libc.so: %s", dlerror());
22 exit(EXIT_FAILURE);
23 }
24
25 printf("AT_HWCAP = 0x%08lX\n", getauxval(AT_HWCAP));
26 #if CPUINFO_ARCH_ARM
27 printf("AT_HWCAP2 = 0x%08lX\n", getauxval(AT_HWCAP2));
28 #endif
29
30 return 0;
31 }
32