X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/b6961e537b5468dc0458808fdacba4a3291e1d48..47f55bc70a0eef068c8a27ca0618a11c512dbf20:/Mach/Inject.cpp

diff --git a/Mach/Inject.cpp b/Mach/Inject.cpp
index ca1f07c..6ca0378 100644
--- a/Mach/Inject.cpp
+++ b/Mach/Inject.cpp
@@ -1,102 +1,302 @@
+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2013  Jay Freeman (saurik)
+*/
+
+/* GNU General Public License, Version 3 {{{ */
+/*
+ * Cycript is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * Cycript is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
+**/
+/* }}} */
+
+#include "TargetConditionals.h"
+#if TARGET_OS_IPHONE
+#undef __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__
+#define __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ __IPHONE_5_0
+#endif
+
 #include <dlfcn.h>
+#include <pthread.h>
+#include <unistd.h>
+
 #include <mach/mach.h>
+#include <mach/vm_map.h>
+#include <mach/mach_vm.h>
 
-extern "C" {
-#include <mach-o/nlist.h>
-}
+#include <mach/machine/thread_status.h>
 
-#include <cstdio>
-#include <pthread.h>
+#ifdef __arm__
+#include "Mach/Memory.hpp"
+#endif
 
 #include "Baton.hpp"
 #include "Exception.hpp"
 #include "Pooling.hpp"
 #include "Trampoline.t.hpp"
 
-extern "C" void _pthread_set_self(pthread_t);
+extern "C" void CYHandleServer(pid_t);
 
-template <typename Type_>
-static void nlset(Type_ &function, struct nlist *nl, size_t index) {
-    struct nlist &name(nl[index]);
-    uintptr_t value(name.n_value);
-    if ((name.n_desc & N_ARM_THUMB_DEF) != 0)
-        value |= 0x00000001;
-    function = reinterpret_cast<Type_>(value);
-}
+extern "C" void *_dyld_get_all_image_infos();
 
 void InjectLibrary(pid_t pid) {
-    const char *library("/Library/MobileSubstrate/DynamicLibraries/Cycript.dylib");
+    Dl_info addr;
+    _assert(dladdr(reinterpret_cast<void *>(&CYHandleServer), &addr) != 0);
 
-    static const size_t Stack_(8 * 1024);
-    size_t length(strlen(library) + 1), depth(sizeof(Baton) + length);
-    depth = (depth + sizeof(uintptr_t) + 1) / sizeof(uintptr_t) * sizeof(uintptr_t);
+    size_t flength(strlen(addr.dli_fname));
+    char library[flength + 4 + 1];
+    memcpy(library, addr.dli_fname, flength);
+    library[flength] = '\0';
+    _assert(strcmp(library + flength - 6, ".dylib") == 0);
+#if !TARGET_OS_IPHONE
+    strcpy(library + flength - 6, "-any.dylib");
+#endif
 
-    CYPool pool;
-    uint8_t *local(reinterpret_cast<uint8_t *>(apr_palloc(pool, depth)));
+    mach_port_t self(mach_task_self()), task;
+    _krncall(task_for_pid(self, pid, &task));
 
-    Baton *baton(reinterpret_cast<Baton *>(local));
-    baton->pthread_create = &pthread_create;
-    baton->pthread_detach = &pthread_detach;
-    baton->dlopen = &dlopen;
-    baton->mach_thread_self = &mach_thread_self;
-    baton->thread_terminate = &thread_terminate;
-    memcpy(baton->library, library, length);
+    task_dyld_info info;
+#ifdef __arm__
+    union {
+        struct {
+            uint32_t all_image_info_addr;
+        } info_1;
 
-    struct nlist nl[2];
-    memset(nl, 0, sizeof(nl));
-    nl[0].n_un.n_name = (char *) "__pthread_set_self";
-    nlist("/usr/lib/libSystem.B.dylib", nl);
-    nlset(baton->_pthread_set_self, nl, 0);
+        struct {
+            uint32_t all_image_info_addr;
+            uint32_t all_image_info_size;
+            int32_t all_image_info_format;
+        } info32;
 
-    vm_size_t size(depth + Stack_);
+        struct {
+            uint64_t all_image_info_addr;
+            uint64_t all_image_info_size;
+            int32_t all_image_info_format;
+        } info64;
+    } infoXX;
 
-    mach_port_t self(mach_task_self()), task;
-    _krncall(task_for_pid(self, pid, &task));
+    mach_msg_type_number_t count(sizeof(infoXX) / sizeof(natural_t));
+    _krncall(task_info(task, TASK_DYLD_INFO, reinterpret_cast<task_info_t>(&infoXX), &count));
 
-    vm_address_t data;
-    _krncall(vm_allocate(task, &data, size, true));
-    vm_address_t stack(data + depth);
-    vm_write(task, data, reinterpret_cast<vm_address_t>(baton), depth);
+    bool broken;
 
-    vm_address_t code;
-    _krncall(vm_allocate(task, &code, sizeof(Trampoline_), true));
-    vm_write(task, code, reinterpret_cast<vm_address_t>(Trampoline_), sizeof(Trampoline_));
-    _krncall(vm_protect(task, code, sizeof(Trampoline_), false, VM_PROT_READ | VM_PROT_EXECUTE));
+    switch (count) {
+        case sizeof(infoXX.info_1) / sizeof(natural_t):
+            broken = true;
+            info.all_image_info_addr = infoXX.info_1.all_image_info_addr;
+            info.all_image_info_size = 0;
+            info.all_image_info_format = TASK_DYLD_ALL_IMAGE_INFO_32;
+            break;
+        case sizeof(infoXX.info32) / sizeof(natural_t):
+            broken = true;
+            info.all_image_info_addr = infoXX.info32.all_image_info_addr;
+            info.all_image_info_size = infoXX.info32.all_image_info_size;
+            info.all_image_info_format = infoXX.info32.all_image_info_format;
+            break;
+        case sizeof(infoXX.info64) / sizeof(natural_t):
+            broken = false;
+            info.all_image_info_addr = infoXX.info64.all_image_info_addr;
+            info.all_image_info_size = infoXX.info64.all_image_info_size;
+            info.all_image_info_format = infoXX.info64.all_image_info_format;
+            break;
+        default:
+            _assert(false);
+    }
+#else
+    mach_msg_type_number_t count(TASK_DYLD_INFO_COUNT);
+    _krncall(task_info(task, TASK_DYLD_INFO, reinterpret_cast<task_info_t>(&info), &count));
+    _assert(count == TASK_DYLD_INFO_COUNT);
+#endif
+    _assert(info.all_image_info_addr != 0);
 
     thread_act_t thread;
     _krncall(thread_create(task, &thread));
 
+    thread_state_t bottom;
     thread_state_flavor_t flavor;
-    mach_msg_type_number_t count;
 
-#if defined(__arm__)
-    arm_thread_state_t state;
+#if defined (__i386__) || defined(__x86_64__)
+    x86_thread_state_t state;
+    memset(&state, 0, sizeof(state));
+
+    bottom = reinterpret_cast<thread_state_t>(&state);
+    flavor = MACHINE_THREAD_STATE;
+    count = MACHINE_THREAD_STATE_COUNT;
+#elif defined(__arm__) || defined(__arm64__)
+    arm_unified_thread_state_t state;
     memset(&state, 0, sizeof(state));
 
-    flavor = ARM_THREAD_STATE;
-    count = ARM_THREAD_STATE_COUNT;
+    switch (info.all_image_info_format) {
+        case TASK_DYLD_ALL_IMAGE_INFO_32:
+            bottom = reinterpret_cast<thread_state_t>(&state.ts_32);
+            flavor = ARM_THREAD_STATE;
+            count = ARM_THREAD_STATE_COUNT;
+            state.ash.flavor = ARM_THREAD_STATE32;
+            break;
+        case TASK_DYLD_ALL_IMAGE_INFO_64:
+            bottom = reinterpret_cast<thread_state_t>(&state.ts_64);
+            flavor = ARM_THREAD_STATE64;
+            count = ARM_THREAD_STATE64_COUNT + 1;
+            state.ash.flavor = ARM_THREAD_STATE64;
+            break;
+        default:
+            _assert(false);
+    }
+#else
+    #error XXX: implement
+#endif
+
+    mach_msg_type_number_t read(count);
+    _krncall(thread_get_state(thread, flavor, bottom, &read));
+    _assert(read == count);
+
+    Trampoline *trampoline;
+    size_t align;
+    size_t push;
+
+#if defined(__i386__) || defined(__x86_64__)
+    switch (state.tsh.flavor) {
+        case i386_THREAD_STATE:
+            trampoline = &Trampoline_i386_;
+            align = 4;
+            push = 5;
+            break;
+        case x86_THREAD_STATE64:
+            trampoline = &Trampoline_x86_64_;
+            align = 8;
+            push = 2;
+            break;
+        default:
+            _assert(false);
+    }
+#elif defined(__arm__) || defined(__arm64__)
+    switch (state.ash.flavor) {
+        case ARM_THREAD_STATE32:
+            trampoline = &Trampoline_armv6_;
+            align = 4;
+            push = 0;
+            break;
+        case ARM_THREAD_STATE64:
+            trampoline = &Trampoline_arm64_;
+            align = 8;
+            push = 0;
+            break;
+        default:
+            _assert(false);
+    }
+#else
+    #error XXX: implement
+#endif
 
-    _krncall(thread_get_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), &count));
-    _assert(count == ARM_THREAD_STATE_COUNT);
+    static const size_t Stack_(8 * 1024);
+    size_t length(strlen(library) + 1), depth(sizeof(Baton) + length);
+    depth = (depth + align + 1) / align * align;
+
+    CYPool pool;
+    uint8_t *local(pool.malloc<uint8_t>(depth));
+    Baton *baton(reinterpret_cast<Baton *>(local));
+
+    baton->dyld = info.all_image_info_addr;
+    baton->pid = getpid();
+    memset(baton->error, 0, sizeof(baton->error));
+    memcpy(baton->library, library, length);
 
-    state.r[0] = data;
-    state.r[1] = RTLD_LAZY | RTLD_GLOBAL;
-    state.sp = stack + Stack_;
-    state.pc = code;
+    mach_vm_size_t size(depth + Stack_);
+    mach_vm_address_t stack;
+    _krncall(mach_vm_allocate(task, &stack, size, true));
 
-    if ((state.pc & 0x1) != 0) {
-        state.pc &= ~0x1;
-        state.cpsr |= 0x20;
+    mach_vm_address_t data(stack + Stack_);
+    _krncall(mach_vm_write(task, data, reinterpret_cast<mach_vm_address_t>(baton), depth));
+
+    mach_vm_address_t code;
+    _krncall(mach_vm_allocate(task, &code, trampoline->size_, true));
+    _krncall(mach_vm_write(task, code, reinterpret_cast<vm_offset_t>(trampoline->data_), trampoline->size_));
+    _krncall(mach_vm_protect(task, code, trampoline->size_, false, VM_PROT_READ | VM_PROT_EXECUTE));
+
+    uint32_t frame[push];
+    if (sizeof(frame) != 0)
+        memset(frame, 0, sizeof(frame));
+
+#if defined(__i386__) || defined(__x86_64__)
+    switch (state.tsh.flavor) {
+        case i386_THREAD_STATE:
+            frame[1] = data;
+            state.uts.ts32.__eip = code + trampoline->entry_;
+            state.uts.ts32.__esp = stack + Stack_ - sizeof(frame);
+            break;
+        case x86_THREAD_STATE64:
+            state.uts.ts64.__rdi = data;
+            state.uts.ts64.__rip = code + trampoline->entry_;
+            state.uts.ts64.__rsp = stack + Stack_ - sizeof(frame);
+            break;
+        default:
+            _assert(false);
     }
+#elif defined(__arm__) || defined(__arm64__)
+    switch (state.ash.flavor) {
+        case ARM_THREAD_STATE32:
+            state.ts_32.__r[0] = data;
+            state.ts_32.__pc = code + trampoline->entry_;
+            state.ts_32.__sp = stack + Stack_ - sizeof(frame);
+
+            if ((state.ts_32.__pc & 0x1) != 0) {
+                state.ts_32.__pc &= ~0x1;
+                state.ts_32.__cpsr |= 0x20;
+            }
 
-    _krncall(thread_set_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), count));
+            break;
+
+        case ARM_THREAD_STATE64:
+            state.ts_64.__x[0] = data;
+            state.ts_64.__pc = code + trampoline->entry_;
+            state.ts_64.__sp = stack + Stack_ - sizeof(frame);
+            break;
+
+        default:
+            _assert(false);
+    }
 #else
     #error XXX: implement
 #endif
 
+    if (sizeof(frame) != 0)
+        _krncall(mach_vm_write(task, stack + Stack_ - sizeof(frame), reinterpret_cast<mach_vm_address_t>(frame), sizeof(frame)));
+
+    _krncall(thread_set_state(thread, flavor, bottom, read));
     _krncall(thread_resume(thread));
 
-    //_krncall(thread_create_running(task, flavor, reinterpret_cast<thread_state_t>(&state), count, &thread));
+    loop: switch (kern_return_t status = thread_get_state(thread, flavor, bottom, &(read = count))) {
+        case KERN_SUCCESS:
+            usleep(10000);
+            goto loop;
+
+        case KERN_TERMINATED:
+        case MACH_SEND_INVALID_DEST:
+            break;
+
+        default:
+            _assert(false);
+    }
+
+    _krncall(mach_port_deallocate(self, thread));
+
+    mach_vm_size_t error(sizeof(baton->error));
+    _krncall(mach_vm_read_overwrite(task, data + offsetof(Baton, error), sizeof(baton->error), reinterpret_cast<mach_vm_address_t>(&baton->error), &error));
+    _assert(error == sizeof(baton->error));
+    if (baton->error[0] != '\0')
+        CYThrow("%s", baton->error);
+
+    _krncall(mach_vm_deallocate(task, code, trampoline->size_));
+    _krncall(mach_vm_deallocate(task, stack, size));
 
-    //_krncall(mach_port_deallocate(self, task));
+    _krncall(mach_port_deallocate(self, task));
 }