X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/5ba3f43ea354af8ad55bea84372a2bc834d8757c..cb3231590a3c94ab4375e2228bd5e86b0cf1ad7e:/osfmk/ipc/mach_kernelrpc.c

diff --git a/osfmk/ipc/mach_kernelrpc.c b/osfmk/ipc/mach_kernelrpc.c
index b4ee58fec..603f841d1 100644
--- a/osfmk/ipc/mach_kernelrpc.c
+++ b/osfmk/ipc/mach_kernelrpc.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2011 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- * 
+ *
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
- * 
+ *
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
- * 
+ *
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -22,7 +22,7 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
- * 
+ *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
@@ -45,20 +45,24 @@ _kernelrpc_mach_vm_allocate_trap(struct _kernelrpc_mach_vm_allocate_trap_args *a
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
-	if (copyin(args->addr, (char *)&addr, sizeof (addr)))
+	if (copyin(args->addr, (char *)&addr, sizeof(addr))) {
 		goto done;
+	}
 
 	rv = mach_vm_allocate_external(task->map, &addr, args->size, args->flags);
-	if (rv == KERN_SUCCESS)
-		rv = copyout(&addr, args->addr, sizeof (addr));
-	
+	if (rv == KERN_SUCCESS) {
+		rv = copyout(&addr, args->addr, sizeof(addr));
+	}
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -67,15 +71,17 @@ _kernelrpc_mach_vm_deallocate_trap(struct _kernelrpc_mach_vm_deallocate_args *ar
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_vm_deallocate(task->map, args->address, args->size);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -84,16 +90,18 @@ _kernelrpc_mach_vm_protect_trap(struct _kernelrpc_mach_vm_protect_args *args)
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_vm_protect(task->map, args->address, args->size,
 	    args->set_maximum, args->new_protection);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -103,22 +111,26 @@ _kernelrpc_mach_vm_map_trap(struct _kernelrpc_mach_vm_map_trap_args *args)
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
-	if (copyin(args->addr, (char *)&addr, sizeof (addr)))
+	if (copyin(args->addr, (char *)&addr, sizeof(addr))) {
 		goto done;
+	}
 
 	rv = mach_vm_map_external(task->map, &addr, args->size, args->mask, args->flags,
-			IPC_PORT_NULL, 0, FALSE, args->cur_protection, VM_PROT_ALL,
-			VM_INHERIT_DEFAULT);
-	if (rv == KERN_SUCCESS)
-		rv = copyout(&addr, args->addr, sizeof (addr));
+	    IPC_PORT_NULL, 0, FALSE, args->cur_protection, VM_PROT_ALL,
+	    VM_INHERIT_DEFAULT);
+	if (rv == KERN_SUCCESS) {
+		rv = copyout(&addr, args->addr, sizeof(addr));
+	}
 
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -129,23 +141,27 @@ _kernelrpc_mach_vm_purgable_control_trap(
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
-	if (copyin(args->state, (char *)&state, sizeof (state)))
+	if (copyin(args->state, (char *)&state, sizeof(state))) {
 		goto done;
+	}
 
 	rv = mach_vm_purgable_control(task->map,
-				      args->address,
-				      args->control,
-				      &state);
-	if (rv == KERN_SUCCESS)
-		rv = copyout(&state, args->state, sizeof (state));
-	
+	    args->address,
+	    args->control,
+	    &state);
+	if (rv == KERN_SUCCESS) {
+		rv = copyout(&state, args->state, sizeof(state));
+	}
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -155,18 +171,21 @@ _kernelrpc_mach_port_allocate_trap(struct _kernelrpc_mach_port_allocate_args *ar
 	mach_port_name_t name;
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_allocate(task->itk_space, args->right, &name);
-	if (rv == KERN_SUCCESS)
-		rv = copyout(&name, args->name, sizeof (name));
+	if (rv == KERN_SUCCESS) {
+		rv = copyout(&name, args->name, sizeof(name));
+	}
+
 
-	
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -175,15 +194,17 @@ _kernelrpc_mach_port_destroy_trap(struct _kernelrpc_mach_port_destroy_args *args
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_destroy(task->itk_space, args->name);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -192,15 +213,17 @@ _kernelrpc_mach_port_deallocate_trap(struct _kernelrpc_mach_port_deallocate_args
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_deallocate(task->itk_space, args->name);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -209,15 +232,17 @@ _kernelrpc_mach_port_mod_refs_trap(struct _kernelrpc_mach_port_mod_refs_args *ar
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_mod_refs(task->itk_space, args->name, args->right, args->delta);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 
@@ -227,15 +252,17 @@ _kernelrpc_mach_port_move_member_trap(struct _kernelrpc_mach_port_move_member_ar
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_move_member(task->itk_space, args->member, args->after);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -246,26 +273,90 @@ _kernelrpc_mach_port_insert_right_trap(struct _kernelrpc_mach_port_insert_right_
 	mach_msg_type_name_t disp;
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
+
+	if (args->name == args->poly) {
+		switch (args->polyPoly) {
+		case MACH_MSG_TYPE_MAKE_SEND:
+		case MACH_MSG_TYPE_COPY_SEND:
+			/* fastpath MAKE_SEND / COPY_SEND which is the most common case */
+			rv = ipc_object_insert_send_right(task->itk_space, args->poly,
+			    args->polyPoly);
+			goto done;
+
+		default:
+			break;
+		}
+	}
 
 	rv = ipc_object_copyin(task->itk_space, args->poly, args->polyPoly,
-	    (ipc_object_t *)&port);
-	if (rv != KERN_SUCCESS)
+	    (ipc_object_t *)&port, 0, NULL, IPC_KMSG_FLAGS_ALLOW_IMMOVABLE_SEND);
+	if (rv != KERN_SUCCESS) {
 		goto done;
+	}
 	disp = ipc_object_copyin_type(args->polyPoly);
 
 	rv = mach_port_insert_right(task->itk_space, args->name, port, disp);
-	if (rv != KERN_SUCCESS) {
-		if (IO_VALID((ipc_object_t)port)) {
-			ipc_object_destroy((ipc_object_t)port, disp);
-		}
+	if (rv != KERN_SUCCESS && IP_VALID(port)) {
+		ipc_object_destroy(ip_to_object(port), disp);
+	}
+
+done:
+	if (task) {
+		task_deallocate(task);
+	}
+	return rv;
+}
+
+int
+_kernelrpc_mach_port_get_attributes_trap(struct _kernelrpc_mach_port_get_attributes_args *args)
+{
+	task_inspect_t task = port_name_to_task_inspect(args->target);
+	int rv = MACH_SEND_INVALID_DEST;
+	mach_msg_type_number_t count;
+
+	if (task != current_task()) {
+		goto done;
+	}
+
+	// MIG does not define the type or size of the mach_port_info_t out array
+	// anywhere, so derive them from the field in the generated reply struct
+#define MACH_PORT_INFO_OUT (((__Reply__mach_port_get_attributes_t*)NULL)->port_info_out)
+#define MACH_PORT_INFO_STACK_LIMIT 80 // current size is 68 == 17 * sizeof(integer_t)
+	_Static_assert(sizeof(MACH_PORT_INFO_OUT) < MACH_PORT_INFO_STACK_LIMIT,
+	    "mach_port_info_t has grown significantly, reevaluate stack usage");
+	const mach_msg_type_number_t max_count = (sizeof(MACH_PORT_INFO_OUT) / sizeof(MACH_PORT_INFO_OUT[0]));
+	typeof(MACH_PORT_INFO_OUT[0]) info[max_count];
+
+	/*
+	 * zero out our stack buffer because not all flavors of
+	 * port_get_attributes initialize the whole struct
+	 */
+	bzero(info, sizeof(MACH_PORT_INFO_OUT));
+
+	if (copyin(CAST_USER_ADDR_T(args->count), &count, sizeof(count))) {
+		rv = MACH_SEND_INVALID_DATA;
+		goto done;
+	}
+	if (count > max_count) {
+		count = max_count;
+	}
+
+	rv = mach_port_get_attributes(task->itk_space, args->name, args->flavor, info, &count);
+	if (rv == KERN_SUCCESS) {
+		rv = copyout(&count, CAST_USER_ADDR_T(args->count), sizeof(count));
 	}
-	
+	if (rv == KERN_SUCCESS && count > 0) {
+		rv = copyout(info, CAST_USER_ADDR_T(args->info), count * sizeof(info[0]));
+	}
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -274,15 +365,17 @@ _kernelrpc_mach_port_insert_member_trap(struct _kernelrpc_mach_port_insert_membe
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_insert_member(task->itk_space, args->name, args->pset);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 
@@ -292,15 +385,17 @@ _kernelrpc_mach_port_extract_member_trap(struct _kernelrpc_mach_port_extract_mem
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_extract_member(task->itk_space, args->name, args->pset);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -311,22 +406,25 @@ _kernelrpc_mach_port_construct_trap(struct _kernelrpc_mach_port_construct_args *
 	int rv = MACH_SEND_INVALID_DEST;
 	mach_port_options_t options;
 
-	if (copyin(args->options, (char *)&options, sizeof (options))) {
+	if (copyin(args->options, (char *)&options, sizeof(options))) {
 		rv = MACH_SEND_INVALID_DATA;
 		goto done;
 	}
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_construct(task->itk_space, &options, args->context, &name);
-	if (rv == KERN_SUCCESS)
-		rv = copyout(&name, args->name, sizeof (name));
+	if (rv == KERN_SUCCESS) {
+		rv = copyout(&name, args->name, sizeof(name));
+	}
 
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -335,15 +433,17 @@ _kernelrpc_mach_port_destruct_trap(struct _kernelrpc_mach_port_destruct_args *ar
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_destruct(task->itk_space, args->name, args->srdelta, args->guard);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -352,15 +452,17 @@ _kernelrpc_mach_port_guard_trap(struct _kernelrpc_mach_port_guard_args *args)
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_guard(task->itk_space, args->name, args->guard, args->strict);
-	
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 int
@@ -369,15 +471,99 @@ _kernelrpc_mach_port_unguard_trap(struct _kernelrpc_mach_port_unguard_args *args
 	task_t task = port_name_to_task(args->target);
 	int rv = MACH_SEND_INVALID_DEST;
 
-	if (task != current_task())
+	if (task != current_task()) {
 		goto done;
+	}
 
 	rv = mach_port_unguard(task->itk_space, args->name, args->guard);
-	
+
+done:
+	if (task) {
+		task_deallocate(task);
+	}
+	return rv;
+}
+
+int
+_kernelrpc_mach_port_type_trap(struct _kernelrpc_mach_port_type_args *args)
+{
+	task_t task = port_name_to_task(args->target);
+	int rv = MACH_SEND_INVALID_DEST;
+	mach_port_type_t type;
+
+	if (task != current_task()) {
+		goto done;
+	}
+
+	rv = mach_port_type(task->itk_space, args->name, &type);
+	if (rv == KERN_SUCCESS) {
+		rv = copyout(&type, args->ptype, sizeof(type));
+	}
+
+done:
+	if (task) {
+		task_deallocate(task);
+	}
+	return rv;
+}
+
+int
+_kernelrpc_mach_port_request_notification_trap(
+	struct _kernelrpc_mach_port_request_notification_args *args)
+{
+	task_t task = port_name_to_task(args->target);
+	int rv = MACH_SEND_INVALID_DEST;
+	ipc_port_t notify, previous;
+	mach_msg_type_name_t disp;
+	mach_port_name_t previous_name = MACH_PORT_NULL;
+
+	if (task != current_task()) {
+		goto done;
+	}
+
+	disp = ipc_object_copyin_type(args->notifyPoly);
+	if (disp != MACH_MSG_TYPE_PORT_SEND_ONCE) {
+		goto done;
+	}
+
+	if (MACH_PORT_VALID(args->notify)) {
+		rv = ipc_object_copyin(task->itk_space, args->notify, args->notifyPoly,
+		    (ipc_object_t *)&notify, 0, NULL, 0);
+	} else {
+		notify = CAST_MACH_NAME_TO_PORT(args->notify);
+	}
+	if (rv != KERN_SUCCESS) {
+		goto done;
+	}
+
+	rv = mach_port_request_notification(task->itk_space, args->name,
+	    args->msgid, args->sync, notify, &previous);
+	if (rv != KERN_SUCCESS) {
+		ipc_object_destroy(ip_to_object(notify), disp);
+		goto done;
+	}
+
+	if (IP_VALID(previous)) {
+		// Remove once <rdar://problem/45522961> is fixed.
+		// We need to make ith_knote NULL as ipc_object_copyout() uses
+		// thread-argument-passing and its value should not be garbage
+		current_thread()->ith_knote = ITH_KNOTE_NULL;
+		rv = ipc_object_copyout(task->itk_space, ip_to_object(previous),
+		    MACH_MSG_TYPE_PORT_SEND_ONCE, NULL, NULL, &previous_name);
+		if (rv != KERN_SUCCESS) {
+			ipc_object_destroy(ip_to_object(previous),
+			    MACH_MSG_TYPE_PORT_SEND_ONCE);
+			goto done;
+		}
+	}
+
+	rv = copyout(&previous_name, args->previous, sizeof(previous_name));
+
 done:
-	if (task)
+	if (task) {
 		task_deallocate(task);
-	return (rv);
+	}
+	return rv;
 }
 
 kern_return_t
@@ -389,13 +575,15 @@ host_create_mach_voucher_trap(struct host_create_mach_voucher_args *args)
 	mach_port_name_t voucher_name = 0;
 	kern_return_t kr = 0;
 
-	if (host == HOST_NULL)
+	if (host == HOST_NULL) {
 		return MACH_SEND_INVALID_DEST;
+	}
 
-	if (args->recipes_size < 0)
+	if (args->recipes_size < 0) {
 		return KERN_INVALID_ARGUMENT;
-	else if (args->recipes_size > MACH_VOUCHER_ATTR_MAX_RAW_RECIPE_ARRAY_SIZE)
+	} else if (args->recipes_size > MACH_VOUCHER_ATTR_MAX_RAW_RECIPE_ARRAY_SIZE) {
 		return MIG_ARRAY_TOO_LARGE;
+	}
 
 	if (args->recipes_size < MACH_VOUCHER_TRAP_STACK_LIMIT) {
 		/* keep small recipes on the stack for speed */
@@ -440,31 +628,36 @@ mach_voucher_extract_attr_recipe_trap(struct mach_voucher_extract_attr_recipe_ar
 	kern_return_t kr = KERN_SUCCESS;
 	mach_msg_type_number_t sz = 0;
 
-	if (copyin(args->recipe_size, (void *)&sz, sizeof(sz)))
+	if (copyin(args->recipe_size, (void *)&sz, sizeof(sz))) {
 		return KERN_MEMORY_ERROR;
+	}
 
-	if (sz > MACH_VOUCHER_ATTR_MAX_RAW_RECIPE_ARRAY_SIZE)
+	if (sz > MACH_VOUCHER_ATTR_MAX_RAW_RECIPE_ARRAY_SIZE) {
 		return MIG_ARRAY_TOO_LARGE;
+	}
 
 	voucher = convert_port_name_to_voucher(args->voucher_name);
-	if (voucher == IV_NULL)
+	if (voucher == IV_NULL) {
 		return MACH_SEND_INVALID_DEST;
+	}
 
 	mach_msg_type_number_t max_sz = sz;
 
 	if (sz < MACH_VOUCHER_TRAP_STACK_LIMIT) {
 		/* keep small recipes on the stack for speed */
 		uint8_t krecipe[sz];
+		bzero(krecipe, sz);
 		if (copyin(CAST_USER_ADDR_T(args->recipe), (void *)krecipe, sz)) {
 			kr = KERN_MEMORY_ERROR;
 			goto done;
 		}
 		kr = mach_voucher_extract_attr_recipe(voucher, args->key,
-		                                      (mach_voucher_attr_raw_recipe_t)krecipe, &sz);
+		    (mach_voucher_attr_raw_recipe_t)krecipe, &sz);
 		assert(sz <= max_sz);
 
-		if (kr == KERN_SUCCESS && sz > 0)
+		if (kr == KERN_SUCCESS && sz > 0) {
 			kr = copyout(krecipe, CAST_USER_ADDR_T(args->recipe), sz);
+		}
 	} else {
 		uint8_t *krecipe = kalloc((vm_size_t)max_sz);
 		if (!krecipe) {
@@ -479,15 +672,18 @@ mach_voucher_extract_attr_recipe_trap(struct mach_voucher_extract_attr_recipe_ar
 		}
 
 		kr = mach_voucher_extract_attr_recipe(voucher, args->key,
-		                                      (mach_voucher_attr_raw_recipe_t)krecipe, &sz);
+		    (mach_voucher_attr_raw_recipe_t)krecipe, &sz);
 		assert(sz <= max_sz);
 
-		if (kr == KERN_SUCCESS && sz > 0)
+		if (kr == KERN_SUCCESS && sz > 0) {
 			kr = copyout(krecipe, CAST_USER_ADDR_T(args->recipe), sz);
+		}
 		kfree(krecipe, (vm_size_t)max_sz);
 	}
 
-	kr = copyout(&sz, args->recipe_size, sizeof(sz));
+	if (kr == KERN_SUCCESS) {
+		kr = copyout(&sz, args->recipe_size, sizeof(sz));
+	}
 
 done:
 	ipc_voucher_release(voucher);