diff --git a/injector.cpp b/injector.cpp index 1f0f38cfc..1b5951ebc 100644 --- a/injector.cpp +++ b/injector.cpp @@ -1,12 +1,14 @@ // injector.cpp – Android ptrace 注入器 (arm64) +// 使用 PTRACE_GETREGSET / PTRACE_SETREGSET 兼容 Android NDK // 编译: arm64-linux-android-clang++ -static -std=c++17 injector.cpp -o injector -// 运行: adb push injector /data/local/tmp/ && adb shell su -c /data/local/tmp/injector +// 运行: adb push injector /data/local/tmp/ && adb shell su -c /data/local/tmp/injector [so_path] [package_name] #include #include #include #include #include +#include #include #include #include @@ -15,6 +17,8 @@ #include #include #include +#include // NT_PRSTATUS +#include // user_pt_regs #include #include #include @@ -50,6 +54,27 @@ int find_pid_by_name(const char* proc_name) { return pid; } +// 读取远程进程内存 +long ptrace_readdata(int pid, unsigned long addr, void* buffer, size_t size) { + for (size_t i = 0; i < size; i += sizeof(long)) { + long data = ptrace(PTRACE_PEEKDATA, pid, addr + i, 0); + if (data == -1 && errno) return -1; + memcpy((char*)buffer + i, &data, std::min(sizeof(long), size - i)); + } + return 0; +} + +// 写入远程进程内存 +long ptrace_writedata(int pid, unsigned long addr, const void* buffer, size_t size) { + for (size_t i = 0; i < size; i += sizeof(long)) { + long data = 0; + memcpy(&data, (char*)buffer + i, std::min(sizeof(long), size - i)); + if (ptrace(PTRACE_POKEDATA, pid, addr + i, data) == -1) + return -1; + } + return 0; +} + // 在远程进程中调用 dlopen 并加载库 // 成功返回 0,失败返回 -1 int ptrace_inject(int pid, const char* so_path) { @@ -68,8 +93,9 @@ int ptrace_inject(int pid, const char* so_path) { // 2. 保存原始寄存器(用于恢复) struct user_pt_regs regs, orig_regs; - if (ptrace(PTRACE_GETREGS, pid, 0, ®s) == -1) { - perror("getregs"); + struct iovec iov = { ®s, sizeof(regs) }; + if (ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, &iov) == -1) { + perror("ptrace getregset"); ptrace(PTRACE_DETACH, pid, 0, 0); return -1; } @@ -78,7 +104,6 @@ int ptrace_inject(int pid, const char* so_path) { // 3. 在远程进程中分配内存,用于存放 so 路径 size_t path_len = strlen(so_path) + 1; // 使用 mmap 分配匿名内存 (ARM64 系统调用号 222) - // 参数:addr=0, length=path_len, prot=PROT_READ|PROT_WRITE, flags=MAP_PRIVATE|MAP_ANONYMOUS, fd=-1, offset=0 regs.regs[0] = 0; // addr regs.regs[1] = path_len; // length regs.regs[2] = PROT_READ | PROT_WRITE;// prot @@ -86,8 +111,9 @@ int ptrace_inject(int pid, const char* so_path) { regs.regs[4] = -1; // fd regs.regs[5] = 0; // offset regs.regs[8] = 222; // syscall number (mmap) - if (ptrace(PTRACE_SETREGS, pid, 0, ®s) == -1) { - perror("setregs for mmap"); + iov.iov_base = ®s; iov.iov_len = sizeof(regs); + if (ptrace(PTRACE_SETREGSET, pid, NT_PRSTATUS, &iov) == -1) { + perror("ptrace setregset for mmap"); ptrace(PTRACE_DETACH, pid, 0, 0); return -1; } @@ -105,8 +131,9 @@ int ptrace_inject(int pid, const char* so_path) { } // 获取返回值(分配的地址) struct user_pt_regs ret_regs; - if (ptrace(PTRACE_GETREGS, pid, 0, &ret_regs) == -1) { - perror("getregs after mmap"); + iov.iov_base = &ret_regs; iov.iov_len = sizeof(ret_regs); + if (ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, &iov) == -1) { + perror("ptrace getregset after mmap"); ptrace(PTRACE_DETACH, pid, 0, 0); return -1; } @@ -119,14 +146,10 @@ int ptrace_inject(int pid, const char* so_path) { printf("Allocated remote memory at 0x%lx\n", remote_addr); // 4. 将 so 路径写入远程内存 - for (size_t i = 0; i < path_len; i += sizeof(long)) { - long data = 0; - memcpy(&data, so_path + i, std::min(sizeof(long), path_len - i)); - if (ptrace(PTRACE_POKEDATA, pid, remote_addr + i, (void*)data) == -1) { - perror("ptrace pokedata"); - ptrace(PTRACE_DETACH, pid, 0, 0); - return -1; - } + if (ptrace_writedata(pid, remote_addr, so_path, path_len) == -1) { + perror("ptrace writedata"); + ptrace(PTRACE_DETACH, pid, 0, 0); + return -1; } // 5. 获取远程进程中 dlopen 的地址 @@ -181,15 +204,14 @@ int ptrace_inject(int pid, const char* so_path) { printf("Remote dlopen address: 0x%lx\n", remote_dlopen_addr); // 6. 调用远程 dlopen(so_path, RTLD_LAZY) - // ARM64 调用约定:x0=路径, x1=flag, PC=dlopen regs = orig_regs; // 恢复成刚 attach 时的状态 regs.regs[0] = remote_addr; // 路径指针 regs.regs[1] = RTLD_LAZY; // 第二个参数 regs.pc = remote_dlopen_addr; // 跳转到 dlopen - // 设置 LR 为一个无效地址,执行后触发段错误停下(我们会捕获) - regs.regs[30] = 0x0; // LR = 0,执行完会 crash,但没关系 - if (ptrace(PTRACE_SETREGS, pid, 0, ®s) == -1) { - perror("setregs for dlopen"); + regs.regs[30] = 0x0; // LR = 0,执行完会 crash + iov.iov_base = ®s; iov.iov_len = sizeof(regs); + if (ptrace(PTRACE_SETREGSET, pid, NT_PRSTATUS, &iov) == -1) { + perror("ptrace setregset for dlopen"); ptrace(PTRACE_DETACH, pid, 0, 0); return -1; } @@ -202,7 +224,7 @@ int ptrace_inject(int pid, const char* so_path) { } waitpid(pid, &status, 0); if (WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV) { - // 预期的段错误,因为 LR=0,dlopen 返回后跳转到 0 + // 预期的段错误,因为 LR=0 printf("dlopen executed (segfault expected)\n"); } else { fprintf(stderr, "unexpected stop: status=%d\n", status); @@ -210,12 +232,11 @@ int ptrace_inject(int pid, const char* so_path) { return -1; } - // 7. 清理:释放远程内存(可选) - // 可以不释放,因为进程会继续运行,so 已经加载。 - // 但为了干净,可调用 munmap,但这里省略。 + // 7. 清理:远程内存可以不释放,进程会继续运行,so 已加载 // 8. 恢复原始寄存器并 detach - if (ptrace(PTRACE_SETREGS, pid, 0, &orig_regs) == -1) { + iov.iov_base = &orig_regs; iov.iov_len = sizeof(orig_regs); + if (ptrace(PTRACE_SETREGSET, pid, NT_PRSTATUS, &iov) == -1) { perror("restore regs"); } if (ptrace(PTRACE_DETACH, pid, 0, 0) == -1) { @@ -229,7 +250,7 @@ int ptrace_inject(int pid, const char* so_path) { int main(int argc, char** argv) { const char* target_name = "com.tencent.jkchess"; - const char* so_path = "/data/local/tmp/libcheat.so"; // 请修改为实际路径 + const char* so_path = "/data/data/com.tencent.jkchess/libcheat.so"; // 默认路径 if (argc >= 2) so_path = argv[1]; if (argc >= 3) target_name = argv[2];