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Demos: Print out ELF Auxiliary Vector in LinkDemo

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This is a test program anyway, so let's double check that the auxv
is done properly here.
This commit is contained in:
Andrew Kaster 2020-07-04 17:39:27 -06:00 • committed by Andreas Kling
parent f96b827990
commit 02018af0cc
1 changed files with 26 additions and 1 deletions
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27
Demos/DynamicLink/LinkDemo/main.cpp
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@ -25,12 +25,37 @@
*/
#include <AK/String.h>
#include <LibELF/AuxiliaryVector.h>
#include <dlfcn.h>
#include <stdio.h>
int main()
int main(int argc, char** argv, char** envp)
{
for (int i = 0; i < argc; ++i) {
printf("argv[%d]: %s\n", i, argv[i]);
}
char** env;
for (env = envp; *env; ++env) {
printf("env: %s\n", *env);
}
for (auxv_t* auxvp = (auxv_t*)++env; auxvp->a_type != AT_NULL; ++auxvp) {
printf("AuxVal: Type=%ld, Val/Ptr=%p\n", auxvp->a_type, auxvp->a_un.a_ptr);
if (auxvp->a_type == AT_PLATFORM) {
printf(" Platform: %s\n", (char*)auxvp->a_un.a_ptr);
} else if (auxvp->a_type == AT_EXECFN) {
printf(" Filename: %s\n", (char*)auxvp->a_un.a_ptr);
} else if (auxvp->a_type == AT_RANDOM) {
auto byte_ptr = (uint8_t*)auxvp->a_un.a_ptr;
printf(" My Random bytes are: ");
for (size_t i = 0; i < 16; ++i) {
printf("0x%2x ", byte_ptr[i]);
}
printf("\n");
}
}
void* handle = dlopen("/usr/lib/libDynamicLib.so", RTLD_LAZY | RTLD_GLOBAL);
if (!handle) {