+/* Cycript - Inlining/Optimizing JavaScript Compiler
+ * Copyright (C) 2009 Jay Freeman (saurik)
+*/
+
+/* Modified BSD License {{{ */
+/*
+ * Redistribution and use in source and binary
+ * forms, with or without modification, are permitted
+ * provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the
+ * above copyright notice, this list of conditions
+ * and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the
+ * above copyright notice, this list of conditions
+ * and the following disclaimer in the documentation
+ * and/or other materials provided with the
+ * distribution.
+ * 3. The name of the author may not be used to endorse
+ * or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/* }}} */
+
#include <dlfcn.h>
#include <mach/mach.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);
+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);
+ _assert(value != 0);
if ((name.n_desc & N_ARM_THUMB_DEF) != 0)
value |= 0x00000001;
- function = reinterpret_cast<Type_>(value);
+ function = value;
}
void InjectLibrary(pid_t pid) {
- const char *library("/Library/MobileSubstrate/DynamicLibraries/Cycript.dylib");
+ // XXX: break this into the build environment
+ const char *library("/usr/lib/libcycript.dylib");
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));
+
+ uintptr_t set_self_internal;
+ uintptr_t set_self_external;
+
+ struct nlist nl[3];
+ memset(nl, 0, sizeof(nl));
+ nl[0].n_un.n_name = (char *) "__pthread_set_self";
+ nl[1].n_un.n_name = (char *) "___pthread_set_self";
+ nlist("/usr/lib/libSystem.B.dylib", nl);
+ nlset(set_self_internal, nl, 0);
+ nlset(set_self_external, nl, 1);
+
+ baton->_pthread_set_self = reinterpret_cast<void (*)(pthread_t)>(reinterpret_cast<uintptr_t>(&__pthread_set_self) - set_self_external + set_self_internal);
+
baton->pthread_create = &pthread_create;
- baton->pthread_detach = &pthread_detach;
+ baton->pthread_join = &pthread_join;
+
baton->dlopen = &dlopen;
+ baton->dlsym = &dlsym;
+
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->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_address_t stack;
+ _krncall(vm_allocate(task, &stack, size, true));
+ vm_address_t data(stack + Stack_);
+
vm_write(task, data, reinterpret_cast<vm_address_t>(baton), depth);
vm_address_t code;
thread_state_flavor_t flavor;
mach_msg_type_number_t count;
+ size_t push;
#if defined(__arm__)
arm_thread_state_t state;
- memset(&state, 0, sizeof(state));
-
flavor = ARM_THREAD_STATE;
count = ARM_THREAD_STATE_COUNT;
+ push = 0;
+#elif defined(__i386__) || defined(__x86_64__)
+ i386_thread_state_t state;
+ flavor = i386_THREAD_STATE;
+ count = i386_THREAD_STATE_COUNT;
+ push = 5;
+#else
+ #error XXX: implement
+#endif
- _krncall(thread_get_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), &count));
- _assert(count == ARM_THREAD_STATE_COUNT);
+ uintptr_t frame[push];
+ if (sizeof(frame) != 0)
+ memset(frame, 0, sizeof(frame));
+ memset(&state, 0, sizeof(state));
+
+ mach_msg_type_number_t read(count);
+ _krncall(thread_get_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), &read));
+ _assert(count == count);
+
+#if defined(__arm__)
state.r[0] = data;
- state.r[1] = RTLD_LAZY | RTLD_GLOBAL;
state.sp = stack + Stack_;
state.pc = code;
state.pc &= ~0x1;
state.cpsr |= 0x20;
}
+#elif defined(__i386__) || defined(__x86_64__)
+ frame[0] = 0;
+ frame[1] = data;
- _krncall(thread_set_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), count));
+ state.__eip = code;
+ state.__esp = 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