X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/97c135350b7004fedf73884720e6e0e9efd431e8..296ee9a6e2205ff657ea382b240193a246fca434:/Mach/Inject.cpp

diff --git a/Mach/Inject.cpp b/Mach/Inject.cpp
index 0f89bb2..c2c735e 100644
--- a/Mach/Inject.cpp
+++ b/Mach/Inject.cpp
@@ -1,48 +1,28 @@
-/* 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/>.
+**/
 /* }}} */
 
 #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>
@@ -55,19 +35,8 @@ extern "C" {
 
 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 = value;
-}
-
 void InjectLibrary(pid_t pid) {
-    // XXX: break this into the build environment
-    const char *library("/usr/lib/libcycript.dylib");
+    const char *library(CY_LIBRARY);
 
     static const size_t Stack_(8 * 1024);
     size_t length(strlen(library) + 1), depth(sizeof(Baton) + length);
@@ -77,33 +46,15 @@ void InjectLibrary(pid_t pid) {
     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;
-
-#if defined(__i386__)
-    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);
-#else
-    set_self_internal = 0;
-    set_self_external = 0;
-#endif
-
-    baton->_pthread_set_self = reinterpret_cast<void (*)(pthread_t)>(reinterpret_cast<uintptr_t>(&__pthread_set_self) - set_self_external + set_self_internal);
-
+    baton->__pthread_set_self = &__pthread_set_self;
     baton->pthread_create = &pthread_create;
-    baton->pthread_join = &pthread_join;
-
-    baton->dlopen = &dlopen;
-    baton->dlsym = &dlsym;
 
     baton->mach_thread_self = &mach_thread_self;
     baton->thread_terminate = &thread_terminate;
 
+    baton->dlerror = &dlerror;
+    baton->dlsym = &dlsym;
+
     baton->pid = getpid();
     memcpy(baton->library, library, length);
 
@@ -118,11 +69,6 @@ void InjectLibrary(pid_t pid) {
 
     vm_write(task, data, reinterpret_cast<vm_address_t>(baton), depth);
 
-    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));
-
     thread_act_t thread;
     _krncall(thread_create(task, &thread));
 
@@ -130,45 +76,69 @@ void InjectLibrary(pid_t pid) {
     mach_msg_type_number_t count;
     size_t push;
 
+    Trampoline *trampoline;
+
 #if defined(__arm__)
+    trampoline = &Trampoline_armv6_;
     arm_thread_state_t state;
     flavor = ARM_THREAD_STATE;
     count = ARM_THREAD_STATE_COUNT;
     push = 0;
-#elif defined(__i386__) || defined(__x86_64__)
+#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
 
-    uintptr_t frame[push];
+    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));
 
     mach_msg_type_number_t read(count);
     _krncall(thread_get_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), &read));
-    _assert(count == count);
+    _assert(read == count);
 
 #if defined(__arm__)
-    state.r[0] = data;
-    state.sp = stack + Stack_;
-    state.pc = code;
+    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;
     }
-#elif defined(__i386__) || defined(__x86_64__)
-    frame[0] = 0;
+#elif defined(__i386__)
     frame[1] = data;
 
-    state.__eip = code;
+    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