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#include <stdlib.h>
#include <stdio.h>
#include <sys/auxv.h>
#include <errno.h>
#include <dlfcn.h>
#include <cpuinfo.h>
typedef unsigned long (*getauxval_function_t)(unsigned long);
int main(int argc, char** argv) {
void* libc = dlopen("libc.so", RTLD_NOW);
if (libc == NULL) {
fprintf(stderr, "Error: failed to load libc.so: %s\n", dlerror());
exit(EXIT_FAILURE);
}
getauxval_function_t getauxval = (getauxval_function_t) dlsym(libc, "getauxval");
if (getauxval == NULL) {
fprintf(stderr, "Error: failed to locate getauxval in libc.so: %s", dlerror());
exit(EXIT_FAILURE);
}
printf("AT_HWCAP = 0x%08lX\n", getauxval(AT_HWCAP));
#if CPUINFO_ARCH_ARM
printf("AT_HWCAP2 = 0x%08lX\n", getauxval(AT_HWCAP2));
#endif
return 0;
}
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