+/* 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>
-extern "C" {
-#include <mach-o/nlist.h>
-}
+#include <mach/i386/thread_status.h>
#include <cstdio>
#include <pthread.h>
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);
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_set_self = &__pthread_set_self;
baton->pthread_create = &pthread_create;
baton->pthread_join = &pthread_join;
baton->dlopen = &dlopen;
+ baton->dlerror = &dlerror;
baton->dlsym = &dlsym;
baton->mach_thread_self = &mach_thread_self;
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));
mach_msg_type_number_t count;
size_t push;
+ Trampoline *trampoline;
+
#if defined(__arm__)
+ trampoline = &Trampoline_arm_;
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);
#if defined(__arm__)
state.r[0] = data;
state.sp = stack + Stack_;
- state.pc = code;
+ state.pc = code + trampoline->entry_;
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
projects / cycript.git / blobdiff