917 lines
33 KiB
C++
917 lines
33 KiB
C++
/*
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* TNG eWallet — Zygisk companion.
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*
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* stable: PLT + ABRT/SIGTRAP swallow + exit_group seccomp@400ms.
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* Promon worker SIGSEGV (libtngdigital_ewallet.so null deref): LR-return skip (cap N).
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* pc==lr 循环 SEGV 也 skip；libc++abi __cxa_guard_acquire → SIGABRT 吞掉。
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*/
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#include <android/log.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <linux/audit.h>
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#include <linux/filter.h>
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#include <linux/seccomp.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stddef.h>
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#include <sys/mman.h>
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#include <sys/prctl.h>
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#include <sys/syscall.h>
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#include <sys/sysmacros.h>
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#include <ucontext.h>
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#include <unistd.h>
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#include <atomic>
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#include <cstdint>
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#include <cstdio>
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#include <cstring>
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#include "zygisk.hpp"
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#define SC_RET_ALLOW 0x7fff0000U
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#define SC_RET_ERRNO_EPERM (0x00050000U | 1U)
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#define LOG_TAG "TngExitGuard"
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#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
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#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
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static constexpr const char *kTargetPkg = "my.com.tngdigital.ewallet";
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static constexpr const char *kPromonSo = "libtngdigital_ewallet.so";
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static bool g_enabled = false;
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static zygisk::Api *g_api = nullptr;
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static std::atomic<int> g_cxx_plt{0};
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static std::atomic<int> g_seccomp_ok{0};
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static std::atomic<int> g_stack_chk{0};
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static std::atomic<int> g_promon_segv{0};
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static std::atomic<uintptr_t> g_promon_start{0};
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static std::atomic<uintptr_t> g_promon_end{0};
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static std::atomic<pid_t> g_main_tid{0};
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static std::atomic<int> g_abrt_swallow{0};
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static std::atomic<pid_t> g_abrt_last_tid{0};
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static std::atomic<uintptr_t> g_abrt_last_pc{0};
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static std::atomic<int> g_abrt_streak{0};
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/* 隔离进程 :goacqowmmt 会循环 SEGV；主进程 worker 也狂刷。cap 后 freeze 该线程 */
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static constexpr int kMaxPromonSegvSkip = 200;
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static constexpr int kMaxAbrtStreak = 3;
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static std::atomic<int> g_soft_sig_logged{0};
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static void freeze_forever() {
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for (;;) pause();
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}
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static void refresh_promon_so_range() {
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FILE *fp = fopen("/proc/self/maps", "r");
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if (!fp) return;
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char line[1024];
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uintptr_t start = 0, end = 0;
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while (fgets(line, sizeof(line), fp)) {
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unsigned long s = 0, e = 0;
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char path[512] = {};
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int n = sscanf(line, "%lx-%lx %*s %*s %*s %*s %511[^\n]", &s, &e, path);
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if (n < 3) continue;
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char *p = path;
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while (*p == ' ') ++p;
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if (strstr(p, kPromonSo) == nullptr) continue;
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if (start == 0 || s < start) start = s;
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if (e > end) end = e;
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}
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fclose(fp);
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if (start != 0 && end > start) {
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g_promon_start.store(start);
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g_promon_end.store(end);
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}
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}
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static bool pc_in_promon_so(uintptr_t pc) {
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uintptr_t start = g_promon_start.load();
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uintptr_t end = g_promon_end.load();
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return start != 0 && pc >= start && pc < end;
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}
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static void promon_segv_handler(int sig, siginfo_t *info, void *ctx) {
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(void)sig;
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(void)info;
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ucontext_t *uc = reinterpret_cast<ucontext_t *>(ctx);
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#if defined(__aarch64__)
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uintptr_t pc = uc->uc_mcontext.pc;
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uintptr_t lr = uc->uc_mcontext.regs[30];
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#else
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uintptr_t pc = 0;
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uintptr_t lr = 0;
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#endif
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refresh_promon_so_range();
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/* Promon 典型 pc==lr 自旋 null deref；maps 尚未刷新时也按此 skip */
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if (pc != 0 && pc == lr) {
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int n = ++g_promon_segv;
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if (n <= 3 || n % 50 == 0) {
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LOGI("promon pc==lr SIGSEGV tid=%d pc=%lx n=%d — skip to pc+4",
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(int)gettid(), (unsigned long)pc, n);
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}
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uc->uc_mcontext.pc = pc + 4;
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return;
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}
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if (pc_in_promon_so(pc) || pc_in_promon_so(lr)) {
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int n = ++g_promon_segv;
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uintptr_t target = lr;
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if (target == 0 || target == pc) {
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target = pc + 4;
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}
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if (kMaxPromonSegvSkip <= 0 || n <= kMaxPromonSegvSkip) {
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if (n <= 3 || n % 50 == 0) {
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LOGI("promon SIGSEGV tid=%d pc=%lx lr=%lx n=%d — skip to %lx",
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(int)gettid(), (unsigned long)pc, (unsigned long)lr, n,
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(unsigned long)target);
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}
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uc->uc_mcontext.pc = target;
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return;
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}
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LOGI("promon SIGSEGV tid=%d n=%d — cap hit, freeze", (int)gettid(), n);
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freeze_forever();
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}
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/* 1.9.10：Login 后出现 Promon so 外 SEGV → 旧逻辑 re-raise 直接闪退 */
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{
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int n = ++g_promon_segv;
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pid_t tid = gettid();
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if (n <= 5 || n % 50 == 0) {
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LOGI("non-promon SIGSEGV tid=%d pc=%lx lr=%lx n=%d — pc+4",
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(int)tid, (unsigned long)pc, (unsigned long)lr, n);
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}
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if (n > 200 && tid != g_main_tid.load()) {
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LOGI("non-promon SEGV storm tid=%d — freeze", (int)tid);
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freeze_forever();
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}
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if (pc != 0) {
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uc->uc_mcontext.pc = pc + 4;
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return;
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}
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}
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freeze_forever();
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}
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/**
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* ABRT/TRAP：一律 pc+4。跳远距 LR 会弄坏主线程 Looper（闪退观感）。
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* 工作线程同 PC 连 abort 超限 → freeze；主线程始终 pc+4。
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*/
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static void fatal_skip_handler(int sig, siginfo_t *info, void *ctx) {
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(void)info;
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ucontext_t *uc = reinterpret_cast<ucontext_t *>(ctx);
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#if defined(__aarch64__)
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uintptr_t pc = uc->uc_mcontext.pc;
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uintptr_t lr = uc->uc_mcontext.regs[30];
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pid_t tid = gettid();
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if (sig == SIGABRT) {
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int streak = 1;
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if (g_abrt_last_tid.load() == tid && g_abrt_last_pc.load() == pc) {
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streak = g_abrt_streak.fetch_add(1) + 1;
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} else {
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g_abrt_last_tid.store(tid);
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g_abrt_last_pc.store(pc);
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g_abrt_streak.store(1);
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}
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if (streak > kMaxAbrtStreak && tid != g_main_tid.load()) {
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LOGI("ABRT streak cap tid=%d pc=%lx n=%d — freeze worker", (int)tid,
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(unsigned long)pc, streak);
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freeze_forever();
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}
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int n = ++g_abrt_swallow;
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/* 主线程：abort 后 _exit 被 seccomp 拦 → abort 内部死循环（还复位 handler）→
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* 主线程永久卡死 → 黑屏/ANR。主线程 ABRT 时跳回 lr（Looper pollOnce）恢复；
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* 仅当 lr 距 pc 远（不在 abort 内部）才跳，否则仍在 abort epilogue 内跳 LR 会再 abort。 */
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uintptr_t target = pc + 4;
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if (tid == g_main_tid.load() && lr != 0 && pc != 0
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&& (lr < pc - 0x1000 || lr > pc + 0x1000)) {
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target = lr;
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}
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if (n <= 5 || n % 50 == 0) {
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LOGI("ABRT tid=%d pc=%lx lr=%lx streak=%d -> %lx", (int)tid,
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(unsigned long)pc, (unsigned long)lr, streak,
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(unsigned long)target);
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}
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uc->uc_mcontext.pc = target;
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return;
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}
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if (sig == SIGTRAP) {
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int n = ++g_abrt_swallow;
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if (n <= 5 || n % 50 == 0) {
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LOGI("TRAP pc+4 tid=%d pc=%lx", (int)tid, (unsigned long)pc);
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}
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uc->uc_mcontext.pc = pc != 0 ? pc + 4 : lr;
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return;
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}
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#endif
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freeze_forever();
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}
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static void install_fatal_skip_handlers() {
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struct sigaction sa {};
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sa.sa_sigaction = fatal_skip_handler;
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sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGABRT, &sa, nullptr);
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sigaction(SIGTRAP, &sa, nullptr);
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LOGI("fatal skip handlers (ABRT/TRAP always pc+4)");
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}
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static void install_promon_segv_handler() {
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refresh_promon_so_range();
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struct sigaction sa {};
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sa.sa_sigaction = promon_segv_handler;
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sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
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sigemptyset(&sa.sa_mask);
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if (sigaction(SIGSEGV, &sa, nullptr) != 0) {
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LOGE("SIGSEGV handler install failed errno=%d", errno);
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return;
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}
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LOGI("promon SIGSEGV handler armed range=%lx-%lx",
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(unsigned long)g_promon_start.load(),
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(unsigned long)g_promon_end.load());
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}
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static void install_soft_signals() {
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struct sigaction sa {};
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sa.sa_sigaction = fatal_skip_handler;
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sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGABRT, &sa, nullptr);
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sigaction(SIGTRAP, &sa, nullptr);
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if (g_soft_sig_logged.fetch_add(1) == 0) {
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LOGI("soft signals (ABRT/TRAP always pc+4)");
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}
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}
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#if defined(__aarch64__)
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#define _BPFI(code, jt, jf, k) \
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((struct sock_filter){(unsigned short)(code), (jt), (jf), (unsigned int)(k)})
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static int install_seccomp_exit_group_only() {
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/* exit_group 拦 + 精准拦 Promon 自杀 kill(SIGABRT)（SI_USER）。
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* 只拦 kill()（nr=129）：Promon 自杀是 kill(pid,SIGABRT) → si_code=SI_USER。
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* 不拦 tgkill/tkill：ART 的 abort() 用 tgkill(self) → si_code=SI_TKILL，
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* 拦它会让 libart 状态错乱 → 进程崩（之前验证）。 */
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struct sock_filter filter[] = {
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// 0: arch
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_BPFI(BPF_LD | BPF_W | BPF_ABS, 0, 0, offsetof(struct seccomp_data, arch)),
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_BPFI(BPF_JMP | BPF_JEQ | BPF_K, 1, 0, AUDIT_ARCH_AARCH64),
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_BPFI(BPF_RET | BPF_K, 0, 0, SC_RET_ALLOW), // 2: not aarch64
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_BPFI(BPF_LD | BPF_W | BPF_ABS, 0, 0, offsetof(struct seccomp_data, nr)),
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_BPFI(BPF_JMP | BPF_JEQ | BPF_K, 0, 1, __NR_exit_group), // 4: exit_group? true→5
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_BPFI(BPF_RET | BPF_K, 0, 0, SC_RET_ERRNO_EPERM), // 5: EPERM exit_group
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_BPFI(BPF_JMP | BPF_JEQ | BPF_K, 0, 3, __NR_kill), // 6: kill? true→7
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_BPFI(BPF_LD | BPF_W | BPF_ABS, 0, 0, offsetof(struct seccomp_data, args) + 8), // 7: args[1]=sig
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_BPFI(BPF_JMP | BPF_JEQ | BPF_K, 0, 1, SIGABRT), // 8: sig==SIGABRT? true→9
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_BPFI(BPF_RET | BPF_K, 0, 0, SC_RET_ERRNO_EPERM), // 9: EPERM kill ABRT
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_BPFI(BPF_RET | BPF_K, 0, 0, SC_RET_ALLOW), // 10: allow
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};
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struct sock_fprog prog = {
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.len = (unsigned short)(sizeof(filter) / sizeof(filter[0])),
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.filter = filter,
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};
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prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0);
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long rc = syscall(__NR_seccomp, SECCOMP_SET_MODE_FILTER,
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SECCOMP_FILTER_FLAG_TSYNC, &prog);
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if (rc != 0) {
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rc = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog);
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if (rc != 0) {
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LOGE("seccomp failed errno=%d", errno);
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return -1;
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}
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LOGI("seccomp exit_group+kill-ABRT via prctl");
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} else {
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LOGI("seccomp exit_group+kill-ABRT via TSYNC");
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}
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g_seccomp_ok.store(1);
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return 0;
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}
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#else
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static int install_seccomp_exit_group_only() { return -1; }
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#endif
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using exit_fn = void (*)(int);
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using kill_fn = int (*)(pid_t, int);
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using tgkill_fn = int (*)(int, int, int);
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using raise_fn = int (*)(int);
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using pthread_kill_fn = int (*)(pthread_t, int);
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using cxa_guard_acquire_fn = int (*)(void *);
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using cxa_guard_abort_fn = void (*)();
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using dlopen_fn = void *(*)(const char *, int);
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using android_dlopen_ext_fn = void *(*)(const char *, int, const void *);
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using sphal_load_fn = void *(*)(const char *, int);
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using open_passthrough_hal_fn = void *(*)(const char *, const char *, int);
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static cxa_guard_acquire_fn orig_cxa_guard_acquire = nullptr;
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static cxa_guard_abort_fn orig_cxa_guard_abort = nullptr;
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static dlopen_fn orig_dlopen = nullptr;
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static android_dlopen_ext_fn orig_android_dlopen_ext = nullptr;
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static sphal_load_fn orig_sphal_load = nullptr;
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static open_passthrough_hal_fn orig_open_passthrough_hal = nullptr;
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static void *g_libandroid_handle = nullptr;
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static void *g_mapper_pixel_handle = nullptr;
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#ifndef RTLD_NOW
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#define RTLD_NOW 2
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#endif
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#ifndef RTLD_GLOBAL
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#define RTLD_GLOBAL 0x100
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#endif
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#ifndef RTLD_NOLOAD
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#define RTLD_NOLOAD 0x4
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#endif
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#ifndef RTLD_DEFAULT
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#define RTLD_DEFAULT reinterpret_cast<void *>(static_cast<uintptr_t>(-1))
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#endif
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static exit_fn orig_exit = nullptr;
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static exit_fn orig__exit = nullptr;
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static void (*orig_abort)() = nullptr;
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static void (*orig_stack_chk_fail)() = nullptr;
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static kill_fn orig_kill = nullptr;
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static tgkill_fn orig_tgkill = nullptr;
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static raise_fn orig_raise = nullptr;
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||
static pthread_kill_fn orig_pthread_kill = nullptr;
|
||
|
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static bool deadly(int sig) {
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return sig == SIGKILL || sig == SIGABRT || sig == SIGTERM ||
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sig == SIGTRAP || sig == SIGILL ||
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sig == 9 || sig == 6 || sig == 5 || sig == 4 || sig == 15;
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}
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static void hooked_exit(int code) { LOGI("blocked exit(%d)", code); }
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static void hooked__exit(int code) { LOGI("blocked _exit(%d)", code); }
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||
static void hooked_abort() {
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LOGI("blocked abort() tid=%d", (int)gettid());
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}
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static void hooked_stack_chk_fail() {
|
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int n = ++g_stack_chk;
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LOGI("blocked __stack_chk_fail tid=%d n=%d", (int)gettid(), n);
|
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}
|
||
static int hooked_raise(int sig) {
|
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if (deadly(sig)) {
|
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LOGI("blocked raise(%d)", sig);
|
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return 0;
|
||
}
|
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return orig_raise ? orig_raise(sig) : -1;
|
||
}
|
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static int hooked_kill(pid_t pid, int sig) {
|
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if (deadly(sig)) {
|
||
LOGI("blocked kill(%d,%d)", (int)pid, sig);
|
||
return 0;
|
||
}
|
||
return orig_kill ? orig_kill(pid, sig) : -1;
|
||
}
|
||
static int hooked_tgkill(int tgid, int tid, int sig) {
|
||
if (deadly(sig)) {
|
||
LOGI("blocked tgkill(%d,%d,%d)", tgid, tid, sig);
|
||
return 0;
|
||
}
|
||
return orig_tgkill ? orig_tgkill(tgid, tid, sig) : -1;
|
||
}
|
||
static int hooked_pthread_kill(pthread_t thread, int sig) {
|
||
if (deadly(sig)) {
|
||
LOGI("blocked pthread_kill(sig=%d)", sig);
|
||
return 0;
|
||
}
|
||
return orig_pthread_kill ? orig_pthread_kill(thread, sig) : -1;
|
||
}
|
||
|
||
/** 仅打断递归初始化；系统 libc++ 静态 ctor（含 gralloc）必须真实执行。 */
|
||
static thread_local void *tl_cxa_guard = nullptr;
|
||
static thread_local int tl_cxa_depth = 0;
|
||
|
||
static int hooked_cxa_guard_acquire(void *guard) {
|
||
if (guard != nullptr && tl_cxa_guard == guard) {
|
||
LOGI("cxa_guard recursive skip tid=%d", (int)gettid());
|
||
return 1;
|
||
}
|
||
if (!orig_cxa_guard_acquire) {
|
||
return 1;
|
||
}
|
||
void *prev = tl_cxa_guard;
|
||
tl_cxa_guard = guard;
|
||
++tl_cxa_depth;
|
||
int r = orig_cxa_guard_acquire(guard);
|
||
--tl_cxa_depth;
|
||
tl_cxa_guard = prev;
|
||
return r;
|
||
}
|
||
static void hooked_cxa_guard_abort() {
|
||
LOGI("blocked __cxa_guard_abort tid=%d depth=%d", (int)gettid(), tl_cxa_depth);
|
||
}
|
||
|
||
static void *try_dlopen_noload(const char *name) {
|
||
if (!orig_dlopen || name == nullptr) {
|
||
return nullptr;
|
||
}
|
||
void *h = orig_dlopen(name, RTLD_NOW | RTLD_NOLOAD);
|
||
if (h != nullptr) {
|
||
return h;
|
||
}
|
||
const char *base = strrchr(name, '/');
|
||
if (base != nullptr && base[1] != '\0') {
|
||
h = orig_dlopen(base + 1, RTLD_NOW | RTLD_NOLOAD);
|
||
}
|
||
return h;
|
||
}
|
||
|
||
/** 校验 dlopen 句柄：拒绝空/明显毒化指针，并用 dlsym 探活。 */
|
||
static bool libandroid_handle_ok(void *h) {
|
||
if (h == nullptr) return false;
|
||
uintptr_t p = reinterpret_cast<uintptr_t>(h);
|
||
// 用户态典型映射；排除明显垃圾（如 0x...c5c5 / 高熵毒化）
|
||
if (p < 0x10000UL) return false;
|
||
if ((p & 0xffffUL) == 0xc5c5UL) return false;
|
||
void *sym = dlsym(h, "ANativeWindow_fromSurface");
|
||
if (sym == nullptr) {
|
||
sym = dlsym(h, "AAssetManager_fromJava");
|
||
}
|
||
return sym != nullptr;
|
||
}
|
||
|
||
static void preload_hwui_libs() {
|
||
if (!orig_dlopen) {
|
||
// PLT 尚未拿到 orig 时，用 libc 直调
|
||
orig_dlopen = reinterpret_cast<dlopen_fn>(dlsym(RTLD_DEFAULT, "dlopen"));
|
||
}
|
||
if (!orig_sphal_load) {
|
||
orig_sphal_load = reinterpret_cast<sphal_load_fn>(
|
||
dlsym(RTLD_DEFAULT, "android_load_sphal_library"));
|
||
}
|
||
if (g_libandroid_handle != nullptr && !libandroid_handle_ok(g_libandroid_handle)) {
|
||
LOGI("drop invalid cached libandroid %p", g_libandroid_handle);
|
||
g_libandroid_handle = nullptr;
|
||
}
|
||
if (g_libandroid_handle == nullptr && orig_dlopen) {
|
||
static const char *kPaths[] = {
|
||
"libandroid.so",
|
||
"/system/lib64/libandroid.so",
|
||
"/apex/com.android.runtime/lib64/libandroid.so",
|
||
};
|
||
for (const char *path : kPaths) {
|
||
void *h = orig_dlopen(path, RTLD_NOW | RTLD_GLOBAL);
|
||
if (h == nullptr) {
|
||
h = try_dlopen_noload(path);
|
||
}
|
||
if (libandroid_handle_ok(h)) {
|
||
g_libandroid_handle = h;
|
||
LOGI("preload libandroid ok path=%s -> %p", path, h);
|
||
break;
|
||
}
|
||
if (h != nullptr) {
|
||
LOGI("preload libandroid reject path=%s -> %p", path, h);
|
||
}
|
||
}
|
||
if (g_libandroid_handle == nullptr) {
|
||
LOGI("preload libandroid FAILED");
|
||
}
|
||
}
|
||
if (g_mapper_pixel_handle == nullptr) {
|
||
if (orig_sphal_load) {
|
||
g_mapper_pixel_handle = orig_sphal_load("mapper.pixel.so", RTLD_NOW);
|
||
LOGI("preload mapper via sphal -> %p", g_mapper_pixel_handle);
|
||
}
|
||
if (g_mapper_pixel_handle == nullptr && orig_dlopen) {
|
||
g_mapper_pixel_handle = orig_dlopen(
|
||
"/vendor/lib64/hw/mapper.pixel.so", RTLD_NOW | RTLD_GLOBAL);
|
||
LOGI("preload mapper via path -> %p", g_mapper_pixel_handle);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void *hooked_dlopen(const char *name, int flags) {
|
||
void *handle = orig_dlopen ? orig_dlopen(name, flags) : nullptr;
|
||
if (name == nullptr) {
|
||
return handle;
|
||
}
|
||
if (handle != nullptr) {
|
||
// 命名空间下偶发返回毒化非空句柄，HWUI 随后 FATAL
|
||
if (strstr(name, "libandroid.so") != nullptr && !libandroid_handle_ok(handle)) {
|
||
LOGI("dlopen got bad handle %p for %s — recover", handle, name);
|
||
handle = nullptr;
|
||
} else {
|
||
if (strstr(name, "libandroid.so") != nullptr) {
|
||
g_libandroid_handle = handle;
|
||
}
|
||
return handle;
|
||
}
|
||
}
|
||
// 已映射库：命名空间下按名 dlopen 会失败，RTLD_NOLOAD 可取回句柄
|
||
handle = try_dlopen_noload(name);
|
||
if (handle != nullptr) {
|
||
if (strstr(name, "libandroid.so") == nullptr || libandroid_handle_ok(handle)) {
|
||
LOGI("dlopen NOLOAD hit name=%s -> %p", name, handle);
|
||
if (strstr(name, "libandroid.so") != nullptr) {
|
||
g_libandroid_handle = handle;
|
||
}
|
||
return handle;
|
||
}
|
||
}
|
||
if (strstr(name, "libandroid.so") != nullptr) {
|
||
if (g_libandroid_handle != nullptr && !libandroid_handle_ok(g_libandroid_handle)) {
|
||
LOGI("drop bad cached libandroid %p", g_libandroid_handle);
|
||
g_libandroid_handle = nullptr;
|
||
}
|
||
if (g_libandroid_handle != nullptr) {
|
||
LOGI("dlopen return cached libandroid %p (from %s)",
|
||
g_libandroid_handle, name);
|
||
return g_libandroid_handle;
|
||
}
|
||
static const char *kAndroidPaths[] = {
|
||
"/system/lib64/libandroid.so",
|
||
"libandroid.so",
|
||
};
|
||
LOGI("dlopen miss name=%s flags=0x%x tid=%d — try fallback",
|
||
name, flags, (int)gettid());
|
||
for (const char *path : kAndroidPaths) {
|
||
handle = try_dlopen_noload(path);
|
||
if (handle == nullptr && orig_dlopen) {
|
||
handle = orig_dlopen(path, flags | RTLD_GLOBAL);
|
||
}
|
||
if (libandroid_handle_ok(handle)) {
|
||
g_libandroid_handle = handle;
|
||
LOGI("dlopen fallback %s -> %p (from %s)", path, handle, name);
|
||
return handle;
|
||
}
|
||
if (handle != nullptr) {
|
||
LOGI("dlopen fallback reject %s -> %p", path, handle);
|
||
}
|
||
}
|
||
LOGI("dlopen fallback failed name=%s tid=%d", name, (int)gettid());
|
||
return nullptr;
|
||
}
|
||
if (strstr(name, "mapper.pixel") != nullptr
|
||
|| strstr(name, "mapper.") != nullptr) {
|
||
if (g_mapper_pixel_handle != nullptr) {
|
||
LOGI("dlopen return cached mapper %p (from %s)",
|
||
g_mapper_pixel_handle, name);
|
||
return g_mapper_pixel_handle;
|
||
}
|
||
if (orig_sphal_load) {
|
||
handle = orig_sphal_load("mapper.pixel.so", RTLD_NOW);
|
||
if (handle != nullptr) {
|
||
g_mapper_pixel_handle = handle;
|
||
LOGI("dlopen sphal mapper -> %p (from %s)", handle, name);
|
||
return handle;
|
||
}
|
||
}
|
||
if (orig_dlopen) {
|
||
handle = orig_dlopen("/vendor/lib64/hw/mapper.pixel.so",
|
||
flags | RTLD_GLOBAL);
|
||
if (handle != nullptr) {
|
||
g_mapper_pixel_handle = handle;
|
||
LOGI("dlopen path mapper -> %p (from %s)", handle, name);
|
||
return handle;
|
||
}
|
||
}
|
||
LOGI("dlopen mapper failed name=%s tid=%d", name, (int)gettid());
|
||
}
|
||
return handle;
|
||
}
|
||
|
||
static void *hooked_android_dlopen_ext(const char *name, int flags, const void *extinfo) {
|
||
void *handle = orig_android_dlopen_ext
|
||
? orig_android_dlopen_ext(name, flags, extinfo)
|
||
: nullptr;
|
||
if (handle != nullptr || name == nullptr) {
|
||
return handle;
|
||
}
|
||
if (strstr(name, "libandroid.so") != nullptr
|
||
|| strstr(name, "mapper") != nullptr) {
|
||
LOGI("android_dlopen_ext miss name=%s — try dlopen fallback", name);
|
||
return hooked_dlopen(name, flags);
|
||
}
|
||
return handle;
|
||
}
|
||
|
||
static bool find_lib_match(const char *suffix, const char *contains,
|
||
dev_t *dev, ino_t *ino) {
|
||
FILE *fp = fopen("/proc/self/maps", "r");
|
||
if (!fp) return false;
|
||
char line[1024];
|
||
bool ok = false;
|
||
while (fgets(line, sizeof(line), fp)) {
|
||
uintptr_t start = 0, end = 0;
|
||
char perms[8] = {};
|
||
unsigned long long offset = 0;
|
||
char deststr[32] = {};
|
||
unsigned long inode = 0;
|
||
char path[512] = {};
|
||
int n = sscanf(line, "%lx-%lx %7s %llx %31s %lu %511[^\n]",
|
||
&start, &end, perms, &offset, deststr, &inode, path);
|
||
if (n < 7 || inode == 0) continue;
|
||
char *p = path;
|
||
while (*p == ' ') ++p;
|
||
bool match = false;
|
||
if (suffix != nullptr) {
|
||
size_t plen = strlen(p);
|
||
size_t slen = strlen(suffix);
|
||
match = plen >= slen && strcmp(p + plen - slen, suffix) == 0;
|
||
} else if (contains != nullptr) {
|
||
match = strstr(p, contains) != nullptr;
|
||
}
|
||
if (!match) continue;
|
||
unsigned maj = 0, min = 0;
|
||
if (sscanf(deststr, "%x:%x", &maj, &min) != 2) continue;
|
||
*dev = makedev(maj, min);
|
||
*ino = inode;
|
||
ok = true;
|
||
break;
|
||
}
|
||
fclose(fp);
|
||
return ok;
|
||
}
|
||
|
||
static bool find_lib_by_suffix(const char *suffix, dev_t *dev, ino_t *ino) {
|
||
return find_lib_match(suffix, nullptr, dev, ino);
|
||
}
|
||
|
||
static bool find_libc(dev_t *dev, ino_t *ino) {
|
||
return find_lib_by_suffix("libc.so", dev, ino);
|
||
}
|
||
|
||
/** 收集 maps 里所有匹配后缀的已加载库（去重）。Zygisk commit 前必须覆盖全部副本，
|
||
* 否则 libc++ 多副本（/system、/vendor、/apex）时只 hook 一份，调用点仍走原生实现。 */
|
||
struct lib_devino {
|
||
dev_t dev;
|
||
ino_t ino;
|
||
};
|
||
|
||
static int find_all_lib_by_suffix(const char *suffix, lib_devino *out, int max) {
|
||
FILE *fp = fopen("/proc/self/maps", "r");
|
||
if (!fp) return 0;
|
||
char line[1024];
|
||
int n = 0;
|
||
while (fgets(line, sizeof(line), fp)) {
|
||
uintptr_t start = 0, end = 0;
|
||
char perms[8] = {};
|
||
unsigned long long offset = 0;
|
||
char deststr[32] = {};
|
||
unsigned long inode = 0;
|
||
char path[512] = {};
|
||
int got = sscanf(line, "%lx-%lx %7s %llx %31s %lu %511[^\n]",
|
||
&start, &end, perms, &offset, deststr, &inode, path);
|
||
if (got < 7 || inode == 0) continue;
|
||
char *p = path;
|
||
while (*p == ' ') ++p;
|
||
size_t plen = strlen(p);
|
||
size_t slen = strlen(suffix);
|
||
if (plen < slen || strcmp(p + plen - slen, suffix) != 0) continue;
|
||
unsigned maj = 0, min = 0;
|
||
if (sscanf(deststr, "%x:%x", &maj, &min) != 2) continue;
|
||
dev_t d = makedev(maj, min);
|
||
ino_t in = inode;
|
||
bool dup = false;
|
||
for (int i = 0; i < n; i++) {
|
||
if (out[i].dev == d && out[i].ino == in) {
|
||
dup = true;
|
||
break;
|
||
}
|
||
}
|
||
if (dup) continue;
|
||
if (n < max) {
|
||
out[n].dev = d;
|
||
out[n].ino = in;
|
||
n++;
|
||
}
|
||
}
|
||
fclose(fp);
|
||
return n;
|
||
}
|
||
|
||
static void register_plt(zygisk::Api *api, dev_t dev, ino_t ino,
|
||
const char *sym, void *hook, void **orig) {
|
||
if (!api || dev == 0 || ino == 0) return;
|
||
api->pltHookRegister(dev, ino, sym, hook, orig);
|
||
}
|
||
|
||
static void *hooked_sphal_load(const char *name, int flags) {
|
||
void *handle = orig_sphal_load ? orig_sphal_load(name, flags) : nullptr;
|
||
if (handle != nullptr || name == nullptr) {
|
||
return handle;
|
||
}
|
||
LOGI("sphal miss name=%s flags=0x%x — try cache/path", name, flags);
|
||
if (strstr(name, "mapper") != nullptr) {
|
||
if (g_mapper_pixel_handle != nullptr) {
|
||
LOGI("sphal return cached mapper %p", g_mapper_pixel_handle);
|
||
return g_mapper_pixel_handle;
|
||
}
|
||
if (orig_dlopen) {
|
||
handle = orig_dlopen("/vendor/lib64/hw/mapper.pixel.so",
|
||
RTLD_NOW | RTLD_GLOBAL);
|
||
if (handle != nullptr) {
|
||
g_mapper_pixel_handle = handle;
|
||
LOGI("sphal path mapper -> %p", handle);
|
||
return handle;
|
||
}
|
||
handle = orig_dlopen("mapper.pixel.so", RTLD_NOW | RTLD_GLOBAL);
|
||
if (handle != nullptr) {
|
||
g_mapper_pixel_handle = handle;
|
||
LOGI("sphal name mapper -> %p", handle);
|
||
return handle;
|
||
}
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
static void *hooked_open_passthrough_hal(const char *interface, const char *instance,
|
||
int dlopen_flags) {
|
||
void *handle = orig_open_passthrough_hal
|
||
? orig_open_passthrough_hal(interface, instance, dlopen_flags)
|
||
: nullptr;
|
||
if (handle != nullptr) {
|
||
return handle;
|
||
}
|
||
LOGI("passthroughHal miss iface=%s inst=%s — try mapper path",
|
||
interface ? interface : "?", instance ? instance : "?");
|
||
if ((interface && strstr(interface, "mapper") != nullptr)
|
||
|| (instance && strstr(instance, "pixel") != nullptr)) {
|
||
if (g_mapper_pixel_handle != nullptr) {
|
||
return g_mapper_pixel_handle;
|
||
}
|
||
if (orig_sphal_load) {
|
||
handle = orig_sphal_load("mapper.pixel.so", RTLD_NOW);
|
||
}
|
||
if (handle == nullptr && orig_dlopen) {
|
||
handle = orig_dlopen("/vendor/lib64/hw/mapper.pixel.so",
|
||
RTLD_NOW | RTLD_GLOBAL);
|
||
}
|
||
if (handle != nullptr) {
|
||
g_mapper_pixel_handle = handle;
|
||
LOGI("passthroughHal mapper recovered -> %p", handle);
|
||
}
|
||
}
|
||
return handle;
|
||
}
|
||
|
||
static void register_dlopen_on_lib(zygisk::Api *api, const char *suffix) {
|
||
dev_t dev = 0;
|
||
ino_t ino = 0;
|
||
if (!find_lib_by_suffix(suffix, &dev, &ino)) {
|
||
return;
|
||
}
|
||
// 必须 hook 调用方 PLT（libhwui/libui），只 hook libc 拦不到 HWUI 的 dlopen
|
||
register_plt(api, dev, ino, "dlopen",
|
||
(void *)hooked_dlopen, (void **)&orig_dlopen);
|
||
register_plt(api, dev, ino, "android_dlopen_ext",
|
||
(void *)hooked_android_dlopen_ext, (void **)&orig_android_dlopen_ext);
|
||
register_plt(api, dev, ino, "android_load_sphal_library",
|
||
(void *)hooked_sphal_load, (void **)&orig_sphal_load);
|
||
register_plt(api, dev, ino, "AServiceManager_openDeclaredPassthroughHal",
|
||
(void *)hooked_open_passthrough_hal,
|
||
(void **)&orig_open_passthrough_hal);
|
||
LOGI("dlopen PLT on %s", suffix);
|
||
}
|
||
|
||
/** 注册所有已加载 libc++ 副本的 __cxa_guard_acquire/abort。返回注册的副本数。 */
|
||
static int register_cxx_guard_hooks(zygisk::Api *api) {
|
||
if (!api) return 0;
|
||
lib_devino libs[8];
|
||
int n = find_all_lib_by_suffix("libc++.so", libs, 8);
|
||
if (n == 0) {
|
||
n = find_all_lib_by_suffix("libc++_shared.so", libs, 8);
|
||
}
|
||
for (int i = 0; i < n; i++) {
|
||
register_plt(api, libs[i].dev, libs[i].ino, "__cxa_guard_acquire",
|
||
(void *)hooked_cxa_guard_acquire, (void **)&orig_cxa_guard_acquire);
|
||
register_plt(api, libs[i].dev, libs[i].ino, "__cxa_guard_abort",
|
||
(void *)hooked_cxa_guard_abort, (void **)&orig_cxa_guard_abort);
|
||
}
|
||
if (n > 0) {
|
||
LOGI("cxx guard target libc++ copies=%d", n);
|
||
}
|
||
return n;
|
||
}
|
||
|
||
static void install_plt(zygisk::Api *api) {
|
||
if (!api) return;
|
||
dev_t dev = 0;
|
||
ino_t ino = 0;
|
||
if (find_libc(&dev, &ino)) {
|
||
register_plt(api, dev, ino, "exit", (void *)hooked_exit, (void **)&orig_exit);
|
||
register_plt(api, dev, ino, "_exit", (void *)hooked__exit, (void **)&orig__exit);
|
||
register_plt(api, dev, ino, "abort", (void *)hooked_abort, (void **)&orig_abort);
|
||
register_plt(api, dev, ino, "__stack_chk_fail",
|
||
(void *)hooked_stack_chk_fail, (void **)&orig_stack_chk_fail);
|
||
register_plt(api, dev, ino, "raise", (void *)hooked_raise, (void **)&orig_raise);
|
||
register_plt(api, dev, ino, "kill", (void *)hooked_kill, (void **)&orig_kill);
|
||
register_plt(api, dev, ino, "tgkill", (void *)hooked_tgkill, (void **)&orig_tgkill);
|
||
register_plt(api, dev, ino, "pthread_kill",
|
||
(void *)hooked_pthread_kill, (void **)&orig_pthread_kill);
|
||
register_plt(api, dev, ino, "dlopen", (void *)hooked_dlopen, (void **)&orig_dlopen);
|
||
register_plt(api, dev, ino, "android_dlopen_ext",
|
||
(void *)hooked_android_dlopen_ext, (void **)&orig_android_dlopen_ext);
|
||
}
|
||
// HWUI / libui 直接 PLT→linker，必须单独挂
|
||
register_dlopen_on_lib(api, "libhwui.so");
|
||
register_dlopen_on_lib(api, "libui.so");
|
||
register_dlopen_on_lib(api, "libandroid_runtime.so");
|
||
register_dlopen_on_lib(api, "libbinder_ndk.so");
|
||
register_dlopen_on_lib(api, "libvndksupport.so");
|
||
// libc++ cxa guard 必须在首次 commit 前注册：Zygisk pltHookCommit 二次调用会失败，
|
||
// 导致 __cxa_guard_acquire 递归 abort 保护从未生效（主线程反复 SIGABRT → 黑屏）。
|
||
int cxx = register_cxx_guard_hooks(api);
|
||
bool ok = api->pltHookCommit();
|
||
LOGI("PLT commit=%d cxx_guard_copies=%d", ok ? 1 : 0, cxx);
|
||
if (ok && cxx > 0) {
|
||
g_cxx_plt.store(1);
|
||
}
|
||
// commit 后立刻预加载，抢在 Promon/命名空间收紧之前拿到句柄
|
||
preload_hwui_libs();
|
||
}
|
||
|
||
static void try_install_cxx_guard_plt() {
|
||
if (g_cxx_plt.load() || !g_api) return;
|
||
dev_t dev = 0;
|
||
ino_t ino = 0;
|
||
bool any = false;
|
||
// libc++ 副本已由首次 PLT commit 覆盖；此处仅补 libtngdigital_ewallet.so 自身 PLT。
|
||
if (find_lib_by_suffix("libtngdigital_ewallet.so", &dev, &ino)) {
|
||
register_plt(g_api, dev, ino, "__cxa_guard_acquire",
|
||
(void *)hooked_cxa_guard_acquire, (void **)&orig_cxa_guard_acquire);
|
||
register_plt(g_api, dev, ino, "__cxa_guard_abort",
|
||
(void *)hooked_cxa_guard_abort, (void **)&orig_cxa_guard_abort);
|
||
any = true;
|
||
LOGI("cxx guard target libtngdigital_ewallet");
|
||
}
|
||
if (!any) return;
|
||
bool ok = g_api->pltHookCommit();
|
||
LOGI("cxx guard commit=%d", ok ? 1 : 0);
|
||
if (ok) {
|
||
g_cxx_plt.store(1);
|
||
LOGI("PLT cxx guards committed (orig acquire + recursive skip)");
|
||
}
|
||
}
|
||
|
||
static void *phase_thread(void *) {
|
||
install_promon_segv_handler();
|
||
/* Promon 用 SVC exit_group 绕过 PLT；必须 seccomp。延迟 400ms 避开最早的 fork/getprop。 */
|
||
usleep(400 * 1000);
|
||
if (install_seccomp_exit_group_only() == 0) {
|
||
LOGI("seccomp exit_group armed @400ms");
|
||
} else {
|
||
LOGE("seccomp install failed");
|
||
}
|
||
for (int i = 0; i < 40; i++) {
|
||
usleep(1000 * 1000);
|
||
install_soft_signals();
|
||
install_promon_segv_handler();
|
||
try_install_cxx_guard_plt();
|
||
if (i % 5 == 0) refresh_promon_so_range();
|
||
}
|
||
LOGI("phase done seccomp=%d stack_chk=%d promon_segv=%d",
|
||
g_seccomp_ok.load(), g_stack_chk.load(), g_promon_segv.load());
|
||
return nullptr;
|
||
}
|
||
|
||
static void install_all(zygisk::Api *api) {
|
||
g_api = api;
|
||
g_main_tid.store(gettid());
|
||
LOGI("install pid=%d main_tid=%d (PLT+cxx-guard+ABRT-pc+4+SEGV-skip+seccomp@400ms)",
|
||
getpid(), (int)g_main_tid.load());
|
||
install_fatal_skip_handlers();
|
||
install_soft_signals();
|
||
install_plt(api);
|
||
pthread_t th;
|
||
if (pthread_create(&th, nullptr, phase_thread, nullptr) == 0) {
|
||
pthread_detach(th);
|
||
}
|
||
LOGI("ready");
|
||
}
|
||
|
||
class TngExitGuardModule : public zygisk::ModuleBase {
|
||
public:
|
||
void onLoad(zygisk::Api *api, JNIEnv *env) override {
|
||
this->api = api;
|
||
this->env = env;
|
||
}
|
||
|
||
void preAppSpecialize(zygisk::AppSpecializeArgs *args) override {
|
||
const char *nice = nullptr;
|
||
if (args->nice_name) {
|
||
nice = env->GetStringUTFChars(args->nice_name, nullptr);
|
||
}
|
||
bool match = nice && (
|
||
std::strncmp(nice, kTargetPkg, std::strlen(kTargetPkg)) == 0);
|
||
if (nice) env->ReleaseStringUTFChars(args->nice_name, nice);
|
||
g_enabled = match;
|
||
if (!match) {
|
||
api->setOption(zygisk::Option::DLCLOSE_MODULE_LIBRARY);
|
||
return;
|
||
}
|
||
LOGI("preAppSpecialize matched");
|
||
}
|
||
|
||
void postAppSpecialize(const zygisk::AppSpecializeArgs *args) override {
|
||
(void)args;
|
||
if (!g_enabled) return;
|
||
install_all(api);
|
||
}
|
||
|
||
private:
|
||
zygisk::Api *api = nullptr;
|
||
JNIEnv *env = nullptr;
|
||
};
|
||
|
||
REGISTER_ZYGISK_MODULE(TngExitGuardModule)
|