| #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; |
| } |