-/* Cycript - Inlining/Optimizing JavaScript Compiler
- * Copyright (C) 2009 Jay Freeman (saurik)
+/* Cycript - Optimizing JavaScript Compiler/Runtime
+ * Copyright (C) 2009-2013 Jay Freeman (saurik)
*/
-/* Modified BSD License {{{ */
+/* GNU General Public License, Version 3 {{{ */
/*
- * Redistribution and use in source and binary
- * forms, with or without modification, are permitted
- * provided that the following conditions are met:
+ * 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.
*
- * 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.
+ * 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.
*
- * 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.
-*/
+ * You should have received a copy of the GNU General Public License
+ * along with Cycript. If not, see <http://www.gnu.org/licenses/>.
+**/
/* }}} */
#define _PTHREAD_ATTR_T
#include <pthread_internals.h>
+#include <mach-o/dyld.h>
+#include <mach-o/dyld_images.h>
+#include <mach-o/loader.h>
+
+extern "C" {
+#include <mach-o/nlist.h>
+}
+
+#include "Standard.hpp"
#include "Baton.hpp"
-void *Routine(void *);
+static void $bzero(void *data, size_t size) {
+ char *bytes(reinterpret_cast<char *>(data));
+ for (size_t i(0); i != size; ++i)
+ bytes[i] = 0;
+}
-extern "C" void Start(Baton *baton) {
- struct _pthread self;
- baton->_pthread_set_self(&self);
+static int $strcmp(const char *lhs, const char *rhs) {
+ while (*lhs == *rhs) {
+ if (*lhs == '\0')
+ return 0;
+ ++lhs, ++rhs;
+ } return *lhs < *rhs ? -1 : 1;
+}
- pthread_t thread;
- baton->pthread_create(&thread, NULL, &Routine, baton);
+#ifdef __LP64__
+typedef struct mach_header_64 mach_header_xx;
+typedef struct nlist_64 nlist_xx;
+typedef struct segment_command_64 segment_command_xx;
+
+static const uint32_t LC_SEGMENT_XX = LC_SEGMENT_64;
+static const uint32_t MH_MAGIC_XX = MH_MAGIC_64;
+#else
+typedef struct mach_header mach_header_xx;
+typedef struct nlist nlist_xx;
+typedef struct segment_command segment_command_xx;
+
+static const uint32_t LC_SEGMENT_XX = LC_SEGMENT;
+static const uint32_t MH_MAGIC_XX = MH_MAGIC;
+#endif
+
+#define forlc(command, mach, lc, type) \
+ if (const struct load_command *load_commands = reinterpret_cast<const struct load_command *>(mach + 1)) \
+ if (const struct load_command *lcp = load_commands) \
+ for (uint32_t i(0); i != mach->ncmds; ++i, lcp = reinterpret_cast<const struct load_command *>(reinterpret_cast<const uint8_t *>(lcp) + lcp->cmdsize)) \
+ if ( \
+ lcp->cmdsize % sizeof(long) != 0 || lcp->cmdsize <= 0 || \
+ reinterpret_cast<const uint8_t *>(lcp) + lcp->cmdsize > reinterpret_cast<const uint8_t *>(load_commands) + mach->sizeofcmds \
+ ) \
+ return NULL; \
+ else if (lcp->cmd != lc) \
+ continue; \
+ else if (lcp->cmdsize < sizeof(type)) \
+ return NULL; \
+ else if (const type *command = reinterpret_cast<const type *>(lcp))
+
+static const mach_header_xx *Library(struct dyld_all_image_infos *infos, const char *name) {
+ for (uint32_t i(0); i != infos->infoArrayCount; ++i) {
+ const dyld_image_info &info(infos->infoArray[i]);
+ const mach_header_xx *mach(reinterpret_cast<const mach_header_xx *>(info.imageLoadAddress));
+ if (mach->magic != MH_MAGIC_XX)
+ continue;
+
+ const char *path(info.imageFilePath);
+ forlc (dylib, mach, LC_ID_DYLIB, dylib_command)
+ path = reinterpret_cast<const char *>(dylib) + dylib->dylib.name.offset;
+ if ($strcmp(path, name) != 0)
+ continue;
+
+ return mach;
+ }
+
+ return NULL;
+}
+
+static void *Symbol(const mach_header_xx *mach, const char *name) {
+ const struct symtab_command *stp(NULL);
+ forlc (command, mach, LC_SYMTAB, struct symtab_command)
+ stp = command;
+ if (stp == NULL)
+ return NULL;
+
+ size_t slide(_not(size_t));
+ const nlist_xx *symbols(NULL);
+ const char *strings(NULL);
+
+ forlc (segment, mach, LC_SEGMENT_XX, segment_command_xx) {
+ if (segment->fileoff == 0)
+ slide = reinterpret_cast<size_t>(mach) - segment->vmaddr;
+ if (stp->symoff >= segment->fileoff && stp->symoff < segment->fileoff + segment->filesize)
+ symbols = reinterpret_cast<const nlist_xx *>(stp->symoff - segment->fileoff + segment->vmaddr + slide);
+ if (stp->stroff >= segment->fileoff && stp->stroff < segment->fileoff + segment->filesize)
+ strings = reinterpret_cast<const char *>(stp->stroff - segment->fileoff + segment->vmaddr + slide);
+ }
+
+ if (slide == _not(size_t) || symbols == NULL || strings == NULL)
+ return NULL;
+
+ for (size_t i(0); i != stp->nsyms; ++i) {
+ const nlist_xx *symbol(&symbols[i]);
+ if (symbol->n_un.n_strx == 0 || (symbol->n_type & N_STAB) != 0)
+ continue;
+
+ const char *nambuf(strings + symbol->n_un.n_strx);
+ if ($strcmp(name, nambuf) != 0)
+ continue;
+
+ uintptr_t value(symbol->n_value);
+ if (value == 0)
+ continue;
+
+ value += slide;
+ return reinterpret_cast<void *>(value);
+ }
+
+ return NULL;
+}
- void *result;
- baton->pthread_join(thread, &result);
+struct Dynamic {
+ char *(*dlerror)();
+ void *(*dlsym)(void *, const char *);
+};
- baton->thread_terminate(baton->mach_thread_self());
+template <typename Type_>
+static _finline void dlset(Dynamic *dynamic, Type_ &function, const char *name, void *handle = RTLD_DEFAULT) {
+ function = reinterpret_cast<Type_>(dynamic->dlsym(handle, name));
+ if (function == NULL)
+ dynamic->dlerror();
+}
+
+template <typename Type_>
+static _finline void cyset(Type_ &function, const char *name, const mach_header_xx *mach) {
+ function = reinterpret_cast<Type_>(Symbol(mach, name));
+}
+
+static _finline const mach_header_xx *Library(Baton *baton, const char *name) {
+ struct dyld_all_image_infos *infos(reinterpret_cast<struct dyld_all_image_infos *>(baton->dyld));
+ return Library(infos, name);
}
void *Routine(void *arg) {
Baton *baton(reinterpret_cast<Baton *>(arg));
- void *handle(baton->dlopen(baton->library, RTLD_LAZY | RTLD_LOCAL));
- void (*HandleServer)(pid_t) = reinterpret_cast<void (*)(pid_t)>(baton->dlsym(handle, "CYHandleServer"));
- HandleServer(baton->pid);
- return arg;
+
+ const mach_header_xx *dyld(Library(baton, "/usr/lib/system/libdyld.dylib"));
+
+ Dynamic dynamic;
+ cyset(dynamic.dlerror, "_dlerror", dyld);
+ cyset(dynamic.dlsym, "_dlsym", dyld);
+
+ int (*pthread_detach)(pthread_t);
+ dlset(&dynamic, pthread_detach, "pthread_detach");
+
+ pthread_t (*pthread_self)();
+ dlset(&dynamic, pthread_self, "pthread_self");
+
+ pthread_detach(pthread_self());
+
+ void *(*dlopen)(const char *, int);
+ dlset(&dynamic, dlopen, "dlopen");
+
+ void *handle(dlopen(baton->library, RTLD_LAZY | RTLD_LOCAL));
+ if (handle == NULL) {
+ dynamic.dlerror();
+ return NULL;
+ }
+
+ void (*CYHandleServer)(pid_t);
+ dlset(&dynamic, CYHandleServer, "CYHandleServer", handle);
+ if (CYHandleServer == NULL) {
+ dynamic.dlerror();
+ return NULL;
+ }
+
+ CYHandleServer(baton->pid);
+ return NULL;
+}
+
+extern "C" void Start(Baton *baton) {
+ struct _pthread self;
+ $bzero(&self, sizeof(self));
+
+ const mach_header_xx *pthread(Library(baton, "/usr/lib/system/libsystem_pthread.dylib"));
+ if (pthread == NULL)
+ pthread = Library(baton, "/usr/lib/system/libsystem_c.dylib");
+
+ void (*$__pthread_set_self)(pthread_t);
+ cyset($__pthread_set_self, "___pthread_set_self", pthread);
+
+ self.tsd[0] = &self;
+ $__pthread_set_self(&self);
+
+ int (*$pthread_create)(pthread_t *, const pthread_attr_t *, void *(*)(void *), void *);
+ cyset($pthread_create, "_pthread_create", pthread);
+
+ pthread_t thread;
+ $pthread_create(&thread, NULL, &Routine, baton);
+
+ const mach_header_xx *kernel(Library(baton, "/usr/lib/system/libsystem_kernel.dylib"));
+
+ mach_port_t (*$mach_thread_self)();
+ cyset($mach_thread_self, "_mach_thread_self", kernel);
+
+ kern_return_t (*$thread_terminate)(thread_act_t);
+ cyset($thread_terminate, "_thread_terminate", kernel);
+
+ $thread_terminate($mach_thread_self());
}
projects / cycript.git / blobdiff