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#define _GNU_SOURCE |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <dlfcn.h> |
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#ifndef __USE_GNU |
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#define __USE_GNU |
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#endif |
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#include <link.h> |
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typedef long long (*func)(char*, unsigned char*, int, int, unsigned char*); |
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char* module_path; |
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uintptr_t offset; |
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func sign; |
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static uintptr_t module_base; |
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static void* module; |
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int callback(struct dl_phdr_info* info, size_t, void*) { |
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if (info->dlpi_name && strstr(info->dlpi_name, "wrapper.node")) { |
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module_base = info->dlpi_addr; |
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printf("Found wrapper.node at base: 0x%lx\n", module_base); |
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return 1; |
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} |
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return 0; |
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} |
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int load_module() { |
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module = dlopen(module_path, RTLD_LAZY); |
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if (!module) { |
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fprintf(stderr, "dlopen failed: %s\n", dlerror()); |
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return 1; |
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} |
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printf("Module handle: %p\n", module); |
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dl_iterate_phdr(callback, NULL); |
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if (module_base == 0) { |
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fprintf(stderr, "Failed to find module base\n"); |
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dlclose(module); |
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return 1; |
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} |
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sign = (func)(module_base + offset); |
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printf("Calculated function address: %p\n", (void*)sign); |
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if ((uintptr_t)sign < 0x10000) { |
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fprintf(stderr, "Invalid function pointer: %p\n", (void*)sign); |
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dlclose(module); |
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return 1; |
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} |
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return 0; |
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} |
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void unload_module() { |
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dlclose(module); |
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} |
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