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https://github.com/geode-sdk/geode.git
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94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
#include <stdlib.h> /* getenv */
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#include <stdio.h>
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#include <string.h>
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#include <iostream>
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#include <fstream>
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#include <set>
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#include <unordered_map>
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#include <dlfcn.h>
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#include <sys/param.h>
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#include "dobby.h"
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#include "common_header.h"
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#define LOG_TAG "DynamicLoaderMonitor"
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std::unordered_map<void *, const char *> traced_dlopen_handle_list;
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static void *(*orig_dlopen)(const char *__file, int __mode);
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static void *fake_dlopen(const char *__file, int __mode) {
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void *result = orig_dlopen(__file, __mode);
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if (result != NULL && __file) {
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char *traced_filename = (char *)malloc(MAXPATHLEN);
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// FIXME: strncpy
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strcpy(traced_filename, __file);
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LOG(1, "[-] dlopen handle: %s", __file);
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traced_dlopen_handle_list.insert(std::make_pair(result, (const char *)traced_filename));
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}
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return result;
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}
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static void *(*orig_loader_dlopen)(const char *filename, int flags, const void *caller_addr);
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static void *fake_loader_dlopen(const char *filename, int flags, const void *caller_addr) {
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void *result = orig_loader_dlopen(filename, flags, caller_addr);
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if (result != NULL) {
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char *traced_filename = (char *)malloc(MAXPATHLEN);
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// FIXME: strncpy
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strcpy(traced_filename, filename);
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LOG(1, "[-] dlopen handle: %s", filename);
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traced_dlopen_handle_list.insert(std::make_pair(result, (const char *)traced_filename));
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}
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return result;
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}
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static const char *get_traced_filename(void *handle, bool removed) {
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std::unordered_map<void *, const char *>::iterator it;
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it = traced_dlopen_handle_list.find(handle);
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if (it != traced_dlopen_handle_list.end()) {
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if (removed)
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traced_dlopen_handle_list.erase(it);
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return it->second;
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}
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return NULL;
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}
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static void *(*orig_dlsym)(void *__handle, const char *__symbol);
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static void *fake_dlsym(void *__handle, const char *__symbol) {
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const char *traced_filename = get_traced_filename(__handle, false);
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if (traced_filename) {
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LOG(1, "[-] dlsym: %s, symbol: %s", traced_filename, __symbol);
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}
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return orig_dlsym(__handle, __symbol);
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}
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static int (*orig_dlclose)(void *__handle);
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static int fake_dlclose(void *__handle) {
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const char *traced_filename = get_traced_filename(__handle, true);
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if (traced_filename) {
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LOG(1, "[-] dlclose: %s", traced_filename);
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free((void *)traced_filename);
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}
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return orig_dlclose(__handle);
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}
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#if 0
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__attribute__((constructor)) static void ctor() {
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#if defined(__ANDROID__)
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#if 0
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void *dl = dlopen("libdl.so", RTLD_LAZY);
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void *__loader_dlopen = dlsym(dl, "__loader_dlopen");
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#endif
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DobbyHook((void *)DobbySymbolResolver(NULL, "__loader_dlopen"), (void *)fake_loader_dlopen,
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(void **)&orig_loader_dlopen);
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#else
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DobbyHook((void *)DobbySymbolResolver(NULL, "dlopen"), (void *)fake_dlopen, (void **)&orig_dlopen);
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#endif
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DobbyHook((void *)dlsym, (void *)fake_dlsym, (void **)&orig_dlsym);
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DobbyHook((void *)dlclose, (void *)fake_dlclose, (void **)&orig_dlclose);
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}
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#endif
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