+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2012 Jay Freeman (saurik)
+*/
+
+/* GNU Lesser General Public License, Version 3 {{{ */
+/*
+ * Cycript is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser 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 Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Cycript. If not, see <http://www.gnu.org/licenses/>.
+**/
+/* }}} */
+
#include <dlfcn.h>
#include <mach/mach.h>
-extern "C" {
-#include <mach-o/nlist.h>
-}
+#include <mach/machine/thread_status.h>
#include <cstdio>
#include <pthread.h>
+#include <unistd.h>
#include "Baton.hpp"
#include "Exception.hpp"
#include "Pooling.hpp"
#include "Trampoline.t.hpp"
-extern "C" void _pthread_set_self(pthread_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 __pthread_set_self(pthread_t);
void InjectLibrary(pid_t pid) {
- const char *library("/Library/MobileSubstrate/DynamicLibraries/Cycript.dylib");
+ const char *library(CY_LIBRARY);
static const size_t Stack_(8 * 1024);
size_t length(strlen(library) + 1), depth(sizeof(Baton) + length);
CYPool pool;
uint8_t *local(reinterpret_cast<uint8_t *>(apr_palloc(pool, depth)));
-
Baton *baton(reinterpret_cast<Baton *>(local));
+
+ baton->__pthread_set_self = &__pthread_set_self;
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);
- 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);
+ baton->dlerror = &dlerror;
+ baton->dlsym = &dlsym;
+
+ baton->pid = getpid();
+ memcpy(baton->library, library, length);
vm_size_t size(depth + Stack_);
mach_port_t self(mach_task_self()), task;
_krncall(task_for_pid(self, pid, &task));
- 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);
+ vm_address_t stack;
+ _krncall(vm_allocate(task, &stack, size, true));
+ vm_address_t data(stack + Stack_);
- 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));
+ vm_write(task, data, reinterpret_cast<vm_address_t>(baton), depth);
thread_act_t thread;
_krncall(thread_create(task, &thread));
thread_state_flavor_t flavor;
mach_msg_type_number_t count;
+ size_t push;
+
+ Trampoline *trampoline;
#if defined(__arm__)
+ trampoline = &Trampoline_armv6_;
arm_thread_state_t state;
- memset(&state, 0, sizeof(state));
-
flavor = ARM_THREAD_STATE;
count = ARM_THREAD_STATE_COUNT;
+ push = 0;
+#elif defined(__i386__)
+ trampoline = &Trampoline_i386_;
+ i386_thread_state_t state;
+ flavor = i386_THREAD_STATE;
+ count = i386_THREAD_STATE_COUNT;
+ push = 5;
+#elif defined(__x86_64__)
+ trampoline = &Trampoline_x86_64_;
+ x86_thread_state64_t state;
+ flavor = x86_THREAD_STATE64;
+ count = x86_THREAD_STATE64_COUNT;
+ push = 2;
+#else
+ #error XXX: implement
+#endif
+
+ vm_address_t code;
+ _krncall(vm_allocate(task, &code, trampoline->size_, true));
+ vm_write(task, code, reinterpret_cast<vm_address_t>(trampoline->data_), trampoline->size_);
+ _krncall(vm_protect(task, code, trampoline->size_, false, VM_PROT_READ | VM_PROT_EXECUTE));
+
+ /*
+ printf("_ptss:%p\n", baton->__pthread_set_self);
+ printf("dlsym:%p\n", baton->dlsym);
+ printf("code:%zx\n", (size_t) code);
+ */
+
+ uint32_t frame[push];
+ if (sizeof(frame) != 0)
+ memset(frame, 0, sizeof(frame));
+ memset(&state, 0, sizeof(state));
- _krncall(thread_get_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), &count));
- _assert(count == ARM_THREAD_STATE_COUNT);
+ mach_msg_type_number_t read(count);
+ _krncall(thread_get_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), &read));
+ _assert(count == count);
- state.r[0] = data;
- state.r[1] = RTLD_LAZY | RTLD_GLOBAL;
- state.sp = stack + Stack_;
- state.pc = code;
+#if defined(__arm__)
+ state.__r[0] = data;
+ state.__sp = stack + Stack_;
+ state.__pc = code + trampoline->entry_;
- if ((state.pc & 0x1) != 0) {
- state.pc &= ~0x1;
- state.cpsr |= 0x20;
+ if ((state.__pc & 0x1) != 0) {
+ state.__pc &= ~0x1;
+ state.__cpsr |= 0x20;
}
-
- _krncall(thread_set_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), count));
+#elif defined(__i386__)
+ frame[1] = data;
+
+ state.__eip = code + trampoline->entry_;
+ state.__esp = stack + Stack_ - sizeof(frame);
+#elif defined(__x86_64__)
+ frame[0] = 0xdeadbeef;
+ state.__rdi = data;
+ state.__rip = code + trampoline->entry_;
+ state.__rsp = stack + Stack_ - sizeof(frame);
#else
#error XXX: implement
#endif
- _krncall(thread_resume(thread));
+ if (sizeof(frame) != 0)
+ vm_write(task, stack + Stack_ - sizeof(frame), reinterpret_cast<vm_address_t>(frame), sizeof(frame));
- //_krncall(thread_create_running(task, flavor, reinterpret_cast<thread_state_t>(&state), count, &thread));
+ _krncall(thread_set_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), count));
+ _krncall(thread_resume(thread));
- //_krncall(mach_port_deallocate(self, task));
+ _krncall(mach_port_deallocate(self, task));
}
projects / cycript.git / blobdiff