X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/3db8ce8e7da01eaa33a409bdd9eb6aeea83e3e15..3370d0c0f21a43223efe9ae0f76e67f04a332781:/Mach/Inject.cpp

diff --git a/Mach/Inject.cpp b/Mach/Inject.cpp
index 6e5f69d..feb2c3c 100644
--- a/Mach/Inject.cpp
+++ b/Mach/Inject.cpp
@@ -20,8 +20,23 @@
 /* }}} */
 
 #include <dlfcn.h>
+
 #include <mach/mach.h>
 
+#ifdef __APPLE__
+#include "TargetConditionals.h"
+#endif
+
+#ifdef TARGET_OS_IPHONE
+#include <mach/vm_map.h>
+#define mach_vm_allocate vm_allocate
+#define mach_vm_protect vm_protect
+#define mach_vm_write vm_write
+#define mach_vm_address_t vm_address_t
+#else
+#include <mach/mach_vm.h>
+#endif
+
 #include <mach/machine/thread_status.h>
 
 #include <cstdio>
@@ -33,76 +48,60 @@
 #include "Pooling.hpp"
 #include "Trampoline.t.hpp"
 
-extern "C" void __pthread_set_self(pthread_t);
+extern "C" void CYHandleServer(pid_t);
 
 void InjectLibrary(pid_t pid) {
-    const char *library(CY_LIBRARY);
-
-    static const size_t Stack_(8 * 1024);
-    size_t length(strlen(library) + 1), depth(sizeof(Baton) + length);
-    depth = (depth + sizeof(uintptr_t) + 1) / sizeof(uintptr_t) * sizeof(uintptr_t);
-
-    CYPool pool;
-    uint8_t *local(pool.malloc<uint8_t>(depth));
-    Baton *baton(reinterpret_cast<Baton *>(local));
-
-    baton->__pthread_set_self = &__pthread_set_self;
-    baton->pthread_create = &pthread_create;
-
-    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);
+    Dl_info addr;
+    _assert(dladdr(reinterpret_cast<void *>(&CYHandleServer), &addr) != 0);
 
-    vm_size_t size(depth + Stack_);
+    size_t flength(strlen(addr.dli_fname));
+    char library[flength + 4 + 1];
+    memcpy(library, addr.dli_fname, flength);
+    library[flength] = '\0';
+    _assert(strcmp(library + flength - 6, ".dylib") == 0);
+    strcpy(library + flength - 6, "-any.dylib");
 
     mach_port_t self(mach_task_self()), task;
     _krncall(task_for_pid(self, pid, &task));
 
-    vm_address_t stack;
-    _krncall(vm_allocate(task, &stack, size, true));
-    vm_address_t data(stack + Stack_);
+    mach_msg_type_number_t count;
 
-    _krncall(vm_write(task, data, reinterpret_cast<vm_address_t>(baton), depth));
+    task_dyld_info info;
+    count = TASK_DYLD_INFO_COUNT;
+    _krncall(task_info(task, TASK_DYLD_INFO, reinterpret_cast<task_info_t>(&info), &count));
+    _assert(count == TASK_DYLD_INFO_COUNT);
+    _assert(info.all_image_info_addr != 0);
 
     thread_act_t thread;
     _krncall(thread_create(task, &thread));
 
-    thread_state_flavor_t flavor;
-    mach_msg_type_number_t count;
-
 #if defined (__i386__) || defined(__x86_64__)
     x86_thread_state_t state;
-    flavor = x86_THREAD_STATE;
-    count = x86_THREAD_STATE_COUNT;
 #elif defined(__arm__)
     arm_thread_state_t state;
-    flavor = ARM_THREAD_STATE;
-    count = ARM_THREAD_STATE_COUNT;
 #else
     #error XXX: implement
 #endif
 
     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(read == count);
+    mach_msg_type_number_t read(MACHINE_THREAD_STATE_COUNT);
+    _krncall(thread_get_state(thread, MACHINE_THREAD_STATE, reinterpret_cast<thread_state_t>(&state), &read));
+    _assert(read == MACHINE_THREAD_STATE_COUNT);
 
     Trampoline *trampoline;
+    size_t align;
     size_t push;
 
 #if defined(__i386__) || defined(__x86_64__)
     switch (state.tsh.flavor) {
         case i386_THREAD_STATE:
             trampoline = &Trampoline_i386_;
+            align = 4;
             push = 5;
             break;
         case x86_THREAD_STATE64:
             trampoline = &Trampoline_x86_64_;
+            align = 8;
             push = 2;
             break;
         default:
@@ -110,15 +109,35 @@ void InjectLibrary(pid_t pid) {
     }
 #elif defined(__arm__)
     trampoline = &Trampoline_armv6_;
+    align = 4;
     push = 0;
 #else
     #error XXX: implement
 #endif
 
-    vm_address_t code;
-    _krncall(vm_allocate(task, &code, trampoline->size_, true));
-    _krncall(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));
+    static const size_t Stack_(8 * 1024);
+    size_t length(strlen(library) + 1), depth(sizeof(Baton) + length);
+    depth = (depth + align + 1) / align * align;
+
+    CYPool pool;
+    uint8_t *local(pool.malloc<uint8_t>(depth));
+    Baton *baton(reinterpret_cast<Baton *>(local));
+
+    baton->dyld = info.all_image_info_addr;
+    baton->pid = getpid();
+    memcpy(baton->library, library, length);
+
+    mach_vm_size_t size(depth + Stack_);
+    mach_vm_address_t stack;
+    _krncall(mach_vm_allocate(task, &stack, size, true));
+
+    mach_vm_address_t data(stack + Stack_);
+    _krncall(mach_vm_write(task, data, reinterpret_cast<mach_vm_address_t>(baton), depth));
+
+    mach_vm_address_t code;
+    _krncall(mach_vm_allocate(task, &code, trampoline->size_, true));
+    _krncall(mach_vm_write(task, code, reinterpret_cast<mach_vm_address_t>(trampoline->data_), trampoline->size_));
+    _krncall(mach_vm_protect(task, code, trampoline->size_, false, VM_PROT_READ | VM_PROT_EXECUTE));
 
     uint32_t frame[push];
     if (sizeof(frame) != 0)
@@ -141,8 +160,8 @@ void InjectLibrary(pid_t pid) {
     }
 #elif defined(__arm__)
     state.__r[0] = data;
-    state.__sp = stack + Stack_;
     state.__pc = code + trampoline->entry_;
+    state.__sp = stack + Stack_ - sizeof(frame);
 
     if ((state.__pc & 0x1) != 0) {
         state.__pc &= ~0x1;
@@ -153,9 +172,9 @@ void InjectLibrary(pid_t pid) {
 #endif
 
     if (sizeof(frame) != 0)
-        _krncall(vm_write(task, stack + Stack_ - sizeof(frame), reinterpret_cast<vm_address_t>(frame), sizeof(frame)));
+        _krncall(mach_vm_write(task, stack + Stack_ - sizeof(frame), reinterpret_cast<mach_vm_address_t>(frame), sizeof(frame)));
 
-    _krncall(thread_set_state(thread, flavor, reinterpret_cast<thread_state_t>(&state), count));
+    _krncall(thread_set_state(thread, MACHINE_THREAD_STATE, reinterpret_cast<thread_state_t>(&state), MACHINE_THREAD_STATE_COUNT));
     _krncall(thread_resume(thread));
 
     _krncall(mach_port_deallocate(self, task));