xerox
4 years ago
parent
5b0da954a1
commit
b31c7bfce7
@ -1,46 +0,0 @@
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#include <elf.h>
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#include <cstdint>
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#include <dlfcn.h>
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#include <map>
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#include <android/log.h>
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#define LOGI(...) ((void)__android_log_print(4, "ligma", __VA_ARGS__))
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#define LOGW(...) ((void)__android_log_print(5, "ligma", __VA_ARGS__))
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namespace ligma
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{
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namespace hook
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{
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//
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// TODO this doesnt work yet, needs to be debugged!
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//
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inline void* got_hook(elf32_hdr* module_base, const std::pair<const char*, const char*>& module_info, void* new_ptr)
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{
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if (!module_base || !module_info.first || !module_info.second || !new_ptr)
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return {};
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const auto orig_module_base = dlopen(module_info.first, RTLD_NOW);
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const auto orig_ptr = dlsym(orig_module_base, module_info.second);
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const auto shstrtab_header_offset = module_base->e_shoff + module_base->e_shstrndx * sizeof(elf32_shdr);
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const auto shstr_header = reinterpret_cast<elf32_shdr*>(reinterpret_cast<std::uintptr_t>(module_base) + shstrtab_header_offset);
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const auto shstr_section = reinterpret_cast<const char*>(module_base) + shstr_header->sh_offset;
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auto section_header = reinterpret_cast<elf32_shdr*>(reinterpret_cast<std::uintptr_t>(module_base) + module_base->e_shoff);
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for (auto idx = 0u; idx < module_base->e_shnum; ++idx)
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{
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if (strcmp(shstr_section + section_header->sh_name, ".got"))
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{
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for (auto section_value = reinterpret_cast<std::uintptr_t>(module_base) + section_header->sh_offset;
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section_value < reinterpret_cast<std::uintptr_t>(module_base) + section_header->sh_size; section_value += 0x8)
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if (*reinterpret_cast<void**>(section_value) == orig_ptr)
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*reinterpret_cast<void**>(section_value) = new_ptr;
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break;
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}
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section_header++;
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}
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return orig_ptr;
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}
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}
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}
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@ -0,0 +1,50 @@
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// Copyright (c) 2018-present, iQIYI, Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// Created by caikelun on 2018-04-11.
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#ifndef XHOOK_H
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#define XHOOK_H 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define XHOOK_EXPORT __attribute__((visibility("default")))
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int xhook_register(const char *pathname_regex_str, const char *symbol,
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void *new_func, void **old_func) XHOOK_EXPORT;
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int xhook_ignore(const char *pathname_regex_str, const char *symbol) XHOOK_EXPORT;
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int xhook_refresh(int async) XHOOK_EXPORT;
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void xhook_clear() XHOOK_EXPORT;
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void xhook_enable_debug(int flag) XHOOK_EXPORT;
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void xhook_enable_sigsegv_protection(int flag) XHOOK_EXPORT;
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#ifdef __cplusplus
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}
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#endif
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#endif
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