#include <mach/mach_types.h>
#include <mach/boolean.h>
#include <mach/kern_return.h>
#include <mach/message.h>
#include <mach/port.h>
#include <mach/vm_map.h>
#include <mach/mach_vm.h>
#include <mach/vm_statistics.h>
#include <kern/kern_types.h>
#include <kern/assert.h>
#include <kern/debug.h>
#include <kern/ipc_kobject.h>
#include <kern/kalloc.h>
#include <kern/zalloc.h>
#include <kern/processor.h>
#include <kern/thread.h>
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <kern/counters.h>
#include <kern/cpu_data.h>
#include <kern/policy_internal.h>
#include <machine/machlimits.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_kern.h>
#include <ipc/port.h>
#include <ipc/ipc_types.h>
#include <ipc/ipc_entry.h>
#include <ipc/ipc_kmsg.h>
#include <ipc/ipc_notify.h>
#include <ipc/ipc_object.h>
#include <ipc/ipc_space.h>
#include <ipc/ipc_port.h>
#include <ipc/ipc_right.h>
#include <ipc/ipc_hash.h>
#include <ipc/ipc_table.h>
#include <ipc/ipc_importance.h>
#if MACH_FLIPC
#include <kern/mach_node.h>
#include <ipc/flipc.h>
#endif
#include <os/overflow.h>
#include <security/mac_mach_internal.h>
#include <device/device_server.h>
#include <string.h>
#ifdef ppc
#include <ppc/Firmware.h>
#include <ppc/low_trace.h>
#endif
#if DEBUG
#define DEBUG_MSGS_K64 1
#endif
#include <sys/kdebug.h>
#include <libkern/OSAtomic.h>
#pragma pack(4)
typedef struct
{
mach_msg_bits_t msgh_bits;
mach_msg_size_t msgh_size;
mach_port_name_t msgh_remote_port;
mach_port_name_t msgh_local_port;
mach_port_name_t msgh_voucher_port;
mach_msg_id_t msgh_id;
} mach_msg_legacy_header_t;
typedef struct
{
mach_msg_legacy_header_t header;
mach_msg_body_t body;
} mach_msg_legacy_base_t;
typedef struct
{
mach_port_name_t name;
mach_msg_size_t pad1;
uint32_t pad2 : 16;
mach_msg_type_name_t disposition : 8;
mach_msg_descriptor_type_t type : 8;
} mach_msg_legacy_port_descriptor_t;
typedef union
{
mach_msg_legacy_port_descriptor_t port;
mach_msg_ool_descriptor32_t out_of_line32;
mach_msg_ool_ports_descriptor32_t ool_ports32;
mach_msg_type_descriptor_t type;
} mach_msg_legacy_descriptor_t;
#pragma pack()
#define LEGACY_HEADER_SIZE_DELTA ((mach_msg_size_t)(sizeof(mach_msg_header_t) - sizeof(mach_msg_legacy_header_t)))
#if DEBUG_MSGS_K64
extern void ipc_pset_print64(
ipc_pset_t pset);
extern void ipc_kmsg_print64(
ipc_kmsg_t kmsg,
const char *str);
extern void ipc_msg_print64(
mach_msg_header_t *msgh);
extern ipc_port_t ipc_name_to_data64(
task_t task,
mach_port_name_t name);
void ipc_msg_print_untyped64(
mach_msg_body_t *body);
const char * ipc_type_name64(
int type_name,
boolean_t received);
void ipc_print_type_name64(
int type_name);
const char *
msgh_bit_decode64(
mach_msg_bits_t bit);
const char *
mm_copy_options_string64(
mach_msg_copy_options_t option);
void db_print_msg_uid64(mach_msg_header_t *);
static void
ipc_msg_body_print64(void *body, int size)
{
uint32_t *word = (uint32_t *) body;
uint32_t *end = (uint32_t *)(((uintptr_t) body) + size
- sizeof(mach_msg_header_t));
int i;
kprintf(" body(%p-%p):\n %p: ", body, end, word);
for (;;) {
for (i = 0; i < 8; i++, word++) {
if (word >= end) {
kprintf("\n");
return;
}
kprintf("%08x ", *word);
}
kprintf("\n %p: ", word);
}
}
const char *
ipc_type_name64(
int type_name,
boolean_t received)
{
switch (type_name) {
case MACH_MSG_TYPE_PORT_NAME:
return "port_name";
case MACH_MSG_TYPE_MOVE_RECEIVE:
if (received) {
return "port_receive";
} else {
return "move_receive";
}
case MACH_MSG_TYPE_MOVE_SEND:
if (received) {
return "port_send";
} else {
return "move_send";
}
case MACH_MSG_TYPE_MOVE_SEND_ONCE:
if (received) {
return "port_send_once";
} else {
return "move_send_once";
}
case MACH_MSG_TYPE_COPY_SEND:
return "copy_send";
case MACH_MSG_TYPE_MAKE_SEND:
return "make_send";
case MACH_MSG_TYPE_MAKE_SEND_ONCE:
return "make_send_once";
default:
return (char *) 0;
}
}
void
ipc_print_type_name64(
int type_name)
{
const char *name = ipc_type_name64(type_name, TRUE);
if (name) {
kprintf("%s", name);
} else {
kprintf("type%d", type_name);
}
}
void
ipc_kmsg_print64(
ipc_kmsg_t kmsg,
const char *str)
{
kprintf("%s kmsg=%p:\n", str, kmsg);
kprintf(" next=%p, prev=%p, size=%d",
kmsg->ikm_next,
kmsg->ikm_prev,
kmsg->ikm_size);
kprintf("\n");
ipc_msg_print64(kmsg->ikm_header);
}
const char *
msgh_bit_decode64(
mach_msg_bits_t bit)
{
switch (bit) {
case MACH_MSGH_BITS_COMPLEX: return "complex";
case MACH_MSGH_BITS_CIRCULAR: return "circular";
default: return (char *) 0;
}
}
void
ipc_msg_print64(
mach_msg_header_t *msgh)
{
mach_msg_bits_t mbits;
unsigned int bit, i;
const char *bit_name;
int needs_comma;
mbits = msgh->msgh_bits;
kprintf(" msgh_bits=0x%x: l=0x%x,r=0x%x\n",
mbits,
MACH_MSGH_BITS_LOCAL(msgh->msgh_bits),
MACH_MSGH_BITS_REMOTE(msgh->msgh_bits));
mbits = MACH_MSGH_BITS_OTHER(mbits) & MACH_MSGH_BITS_USED;
kprintf(" decoded bits: ");
needs_comma = 0;
for (i = 0, bit = 1; i < sizeof(mbits) * 8; ++i, bit <<= 1) {
if ((mbits & bit) == 0)
continue;
bit_name = msgh_bit_decode64((mach_msg_bits_t)bit);
if (bit_name)
kprintf("%s%s", needs_comma ? "," : "", bit_name);
else
kprintf("%sunknown(0x%x),", needs_comma ? "," : "", bit);
++needs_comma;
}
if (msgh->msgh_bits & ~MACH_MSGH_BITS_USED) {
kprintf("%sunused=0x%x,", needs_comma ? "," : "",
msgh->msgh_bits & ~MACH_MSGH_BITS_USED);
}
kprintf("\n");
needs_comma = 1;
if (msgh->msgh_remote_port) {
kprintf(" remote=%p(", msgh->msgh_remote_port);
ipc_print_type_name64(MACH_MSGH_BITS_REMOTE(msgh->msgh_bits));
kprintf(")");
} else {
kprintf(" remote=null");
}
if (msgh->msgh_local_port) {
kprintf("%slocal=%p(", needs_comma ? "," : "",
msgh->msgh_local_port);
ipc_print_type_name64(MACH_MSGH_BITS_LOCAL(msgh->msgh_bits));
kprintf(")\n");
} else {
kprintf("local=null\n");
}
kprintf(" msgh_id=%d, size=%d\n",
msgh->msgh_id,
msgh->msgh_size);
if (mbits & MACH_MSGH_BITS_COMPLEX) {
ipc_msg_print_untyped64((mach_msg_body_t *) (msgh + 1));
}
ipc_msg_body_print64((void *)(msgh + 1), msgh->msgh_size);
}
const char *
mm_copy_options_string64(
mach_msg_copy_options_t option)
{
const char *name;
switch (option) {
case MACH_MSG_PHYSICAL_COPY:
name = "PHYSICAL";
break;
case MACH_MSG_VIRTUAL_COPY:
name = "VIRTUAL";
break;
case MACH_MSG_OVERWRITE:
name = "OVERWRITE(DEPRECATED)";
break;
case MACH_MSG_ALLOCATE:
name = "ALLOCATE";
break;
case MACH_MSG_KALLOC_COPY_T:
name = "KALLOC_COPY_T";
break;
default:
name = "unknown";
break;
}
return name;
}
void
ipc_msg_print_untyped64(
mach_msg_body_t *body)
{
mach_msg_descriptor_t *saddr, *send;
mach_msg_descriptor_type_t type;
kprintf(" %d descriptors: \n", body->msgh_descriptor_count);
saddr = (mach_msg_descriptor_t *) (body + 1);
send = saddr + body->msgh_descriptor_count;
for ( ; saddr < send; saddr++ ) {
type = saddr->type.type;
switch (type) {
case MACH_MSG_PORT_DESCRIPTOR: {
mach_msg_port_descriptor_t *dsc;
dsc = &saddr->port;
kprintf(" PORT name = %p disp = ", dsc->name);
ipc_print_type_name64(dsc->disposition);
kprintf("\n");
break;
}
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR: {
mach_msg_ool_descriptor_t *dsc;
dsc = (mach_msg_ool_descriptor_t *) &saddr->out_of_line;
kprintf(" OOL%s addr = %p size = 0x%x copy = %s %s\n",
type == MACH_MSG_OOL_DESCRIPTOR ? "" : " VOLATILE",
dsc->address, dsc->size,
mm_copy_options_string64(dsc->copy),
dsc->deallocate ? "DEALLOC" : "");
break;
}
case MACH_MSG_OOL_PORTS_DESCRIPTOR : {
mach_msg_ool_ports_descriptor_t *dsc;
dsc = (mach_msg_ool_ports_descriptor_t *) &saddr->ool_ports;
kprintf(" OOL_PORTS addr = %p count = 0x%x ",
dsc->address, dsc->count);
kprintf("disp = ");
ipc_print_type_name64(dsc->disposition);
kprintf(" copy = %s %s\n",
mm_copy_options_string64(dsc->copy),
dsc->deallocate ? "DEALLOC" : "");
break;
}
default: {
kprintf(" UNKNOWN DESCRIPTOR 0x%x\n", type);
break;
}
}
}
}
#define DEBUG_IPC_KMSG_PRINT(kmsg,string) \
__unreachable_ok_push \
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) { \
ipc_kmsg_print64(kmsg, string); \
} \
__unreachable_ok_pop
#define DEBUG_IPC_MSG_BODY_PRINT(body,size) \
__unreachable_ok_push \
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) { \
ipc_msg_body_print64(body,size);\
} \
__unreachable_ok_pop
#else
#define DEBUG_IPC_KMSG_PRINT(kmsg,string)
#define DEBUG_IPC_MSG_BODY_PRINT(body,size)
#endif
extern vm_map_t ipc_kernel_copy_map;
extern vm_size_t ipc_kmsg_max_space;
extern vm_size_t ipc_kmsg_max_vm_space;
extern vm_size_t ipc_kmsg_max_body_space;
extern vm_size_t msg_ool_size_small;
#define MSG_OOL_SIZE_SMALL msg_ool_size_small
#if defined(__LP64__)
#define MAP_SIZE_DIFFERS(map) (map->max_offset < MACH_VM_MAX_ADDRESS)
#define OTHER_OOL_DESCRIPTOR mach_msg_ool_descriptor32_t
#define OTHER_OOL_PORTS_DESCRIPTOR mach_msg_ool_ports_descriptor32_t
#else
#define MAP_SIZE_DIFFERS(map) (map->max_offset > VM_MAX_ADDRESS)
#define OTHER_OOL_DESCRIPTOR mach_msg_ool_descriptor64_t
#define OTHER_OOL_PORTS_DESCRIPTOR mach_msg_ool_ports_descriptor64_t
#endif
#define DESC_SIZE_ADJUSTMENT ((mach_msg_size_t)(sizeof(mach_msg_ool_descriptor64_t) - \
sizeof(mach_msg_ool_descriptor32_t)))
#define SKIP_PORT_DESCRIPTORS(s, c) \
MACRO_BEGIN \
if ((s) != MACH_MSG_DESCRIPTOR_NULL) { \
while ((c) > 0) { \
if ((s)->type.type != MACH_MSG_PORT_DESCRIPTOR) \
break; \
(s)++; (c)--; \
} \
if (c == 0) \
(s) = MACH_MSG_DESCRIPTOR_NULL; \
} \
MACRO_END
#define INCREMENT_SCATTER(s, c, d) \
MACRO_BEGIN \
if ((s) != MACH_MSG_DESCRIPTOR_NULL) { \
s = (d) ? (mach_msg_descriptor_t *) \
((OTHER_OOL_DESCRIPTOR *)(s) + 1) : \
(s + 1); \
(c)--; \
} \
MACRO_END
#define KMSG_TRACE_FLAG_TRACED 0x000001
#define KMSG_TRACE_FLAG_COMPLEX 0x000002
#define KMSG_TRACE_FLAG_OOLMEM 0x000004
#define KMSG_TRACE_FLAG_VCPY 0x000008
#define KMSG_TRACE_FLAG_PCPY 0x000010
#define KMSG_TRACE_FLAG_SND64 0x000020
#define KMSG_TRACE_FLAG_RAISEIMP 0x000040
#define KMSG_TRACE_FLAG_APP_SRC 0x000080
#define KMSG_TRACE_FLAG_APP_DST 0x000100
#define KMSG_TRACE_FLAG_DAEMON_SRC 0x000200
#define KMSG_TRACE_FLAG_DAEMON_DST 0x000400
#define KMSG_TRACE_FLAG_DST_NDFLTQ 0x000800
#define KMSG_TRACE_FLAG_SRC_NDFLTQ 0x001000
#define KMSG_TRACE_FLAG_DST_SONCE 0x002000
#define KMSG_TRACE_FLAG_SRC_SONCE 0x004000
#define KMSG_TRACE_FLAG_CHECKIN 0x008000
#define KMSG_TRACE_FLAG_ONEWAY 0x010000
#define KMSG_TRACE_FLAG_IOKIT 0x020000
#define KMSG_TRACE_FLAG_SNDRCV 0x040000
#define KMSG_TRACE_FLAG_DSTQFULL 0x080000
#define KMSG_TRACE_FLAG_VOUCHER 0x100000
#define KMSG_TRACE_FLAG_TIMER 0x200000
#define KMSG_TRACE_FLAG_SEMA 0x400000
#define KMSG_TRACE_FLAG_DTMPOWNER 0x800000
#define KMSG_TRACE_FLAGS_MASK 0xffffff
#define KMSG_TRACE_FLAGS_SHIFT 8
#define KMSG_TRACE_PORTS_MASK 0xff
#define KMSG_TRACE_PORTS_SHIFT 0
#if (KDEBUG_LEVEL >= KDEBUG_LEVEL_STANDARD)
#include <stdint.h>
extern boolean_t kdebug_debugid_enabled(uint32_t debugid);
void ipc_kmsg_trace_send(ipc_kmsg_t kmsg,
mach_msg_option_t option)
{
task_t send_task = TASK_NULL;
ipc_port_t dst_port, src_port;
boolean_t is_task_64bit;
mach_msg_header_t *msg;
mach_msg_trailer_t *trailer;
int kotype = 0;
uint32_t msg_size = 0;
uint32_t msg_flags = KMSG_TRACE_FLAG_TRACED;
uint32_t num_ports = 0;
uint32_t send_pid, dst_pid;
if (__probable((kdebug_enable & KDEBUG_TRACE) == 0))
return;
if (!kdebug_debugid_enabled(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO)))
return;
msg = kmsg->ikm_header;
dst_port = (ipc_port_t)(msg->msgh_remote_port);
if (!IPC_PORT_VALID(dst_port))
return;
if ((option & (MACH_SEND_MSG|MACH_RCV_MSG)) == (MACH_SEND_MSG|MACH_RCV_MSG))
msg_flags |= KMSG_TRACE_FLAG_SNDRCV;
if (msg->msgh_id >= is_iokit_subsystem.start &&
msg->msgh_id < is_iokit_subsystem.end + 100)
msg_flags |= KMSG_TRACE_FLAG_IOKIT;
else if (msg->msgh_id == 0x77303074u )
msg_flags |= KMSG_TRACE_FLAG_CHECKIN;
if (msg->msgh_bits & MACH_MSGH_BITS_RAISEIMP)
msg_flags |= KMSG_TRACE_FLAG_RAISEIMP;
if (unsafe_convert_port_to_voucher(kmsg->ikm_voucher))
msg_flags |= KMSG_TRACE_FLAG_VOUCHER;
send_task = current_task();
send_pid = task_pid(send_task);
if (send_pid != 0) {
if (task_is_daemon(send_task))
msg_flags |= KMSG_TRACE_FLAG_DAEMON_SRC;
else if (task_is_app(send_task))
msg_flags |= KMSG_TRACE_FLAG_APP_SRC;
}
is_task_64bit = (send_task->map->max_offset > VM_MAX_ADDRESS);
if (is_task_64bit)
msg_flags |= KMSG_TRACE_FLAG_SND64;
src_port = (ipc_port_t)(msg->msgh_local_port);
if (src_port) {
if (src_port->ip_messages.imq_qlimit != MACH_PORT_QLIMIT_DEFAULT)
msg_flags |= KMSG_TRACE_FLAG_SRC_NDFLTQ;
switch (MACH_MSGH_BITS_LOCAL(msg->msgh_bits)) {
case MACH_MSG_TYPE_MOVE_SEND_ONCE:
msg_flags |= KMSG_TRACE_FLAG_SRC_SONCE;
break;
default:
break;
}
} else {
msg_flags |= KMSG_TRACE_FLAG_ONEWAY;
}
ip_lock(dst_port);
if (!ip_active(dst_port)) {
dst_pid = (uint32_t)0xfffffff0;
} else if (dst_port->ip_tempowner) {
msg_flags |= KMSG_TRACE_FLAG_DTMPOWNER;
if (IIT_NULL != dst_port->ip_imp_task)
dst_pid = task_pid(dst_port->ip_imp_task->iit_task);
else
dst_pid = (uint32_t)0xfffffff1;
} else if (dst_port->ip_receiver_name == MACH_PORT_NULL) {
dst_pid = (uint32_t)0xfffffff2;
} else {
if (dst_port->ip_receiver == ipc_space_kernel) {
dst_pid = 0;
} else {
ipc_space_t dst_space;
dst_space = dst_port->ip_receiver;
if (dst_space && is_active(dst_space)) {
dst_pid = task_pid(dst_space->is_task);
if (task_is_daemon(dst_space->is_task))
msg_flags |= KMSG_TRACE_FLAG_DAEMON_DST;
else if (task_is_app(dst_space->is_task))
msg_flags |= KMSG_TRACE_FLAG_APP_DST;
} else {
dst_pid = (uint32_t)0xfffffff3;
}
}
}
if (dst_port->ip_messages.imq_qlimit != MACH_PORT_QLIMIT_DEFAULT)
msg_flags |= KMSG_TRACE_FLAG_DST_NDFLTQ;
if (imq_full(&dst_port->ip_messages))
msg_flags |= KMSG_TRACE_FLAG_DSTQFULL;
kotype = ip_kotype(dst_port);
ip_unlock(dst_port);
switch (kotype) {
case IKOT_SEMAPHORE:
msg_flags |= KMSG_TRACE_FLAG_SEMA;
break;
case IKOT_TIMER:
case IKOT_CLOCK:
msg_flags |= KMSG_TRACE_FLAG_TIMER;
break;
case IKOT_MASTER_DEVICE:
case IKOT_IOKIT_CONNECT:
case IKOT_IOKIT_OBJECT:
case IKOT_IOKIT_IDENT:
msg_flags |= KMSG_TRACE_FLAG_IOKIT;
break;
default:
break;
}
switch(MACH_MSGH_BITS_REMOTE(msg->msgh_bits)) {
case MACH_MSG_TYPE_PORT_SEND_ONCE:
msg_flags |= KMSG_TRACE_FLAG_DST_SONCE;
break;
default:
break;
}
msg_size = msg->msgh_size - sizeof(mach_msg_header_t);
if (msg->msgh_bits & MACH_MSGH_BITS_COMPLEX) {
mach_msg_body_t *msg_body;
mach_msg_descriptor_t *kern_dsc;
int dsc_count;
msg_flags |= KMSG_TRACE_FLAG_COMPLEX;
msg_body = (mach_msg_body_t *)(kmsg->ikm_header + 1);
dsc_count = (int)msg_body->msgh_descriptor_count;
kern_dsc = (mach_msg_descriptor_t *)(msg_body + 1);
if (!is_task_64bit)
msg_size -= (dsc_count * 12);
for (int i = 0; i < dsc_count; i++) {
switch (kern_dsc[i].type.type) {
case MACH_MSG_PORT_DESCRIPTOR:
num_ports++;
if (is_task_64bit)
msg_size -= 12;
break;
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR: {
mach_msg_ool_descriptor_t *dsc;
dsc = (mach_msg_ool_descriptor_t *)&kern_dsc[i];
msg_flags |= KMSG_TRACE_FLAG_OOLMEM;
msg_size += dsc->size;
if ((dsc->size >= MSG_OOL_SIZE_SMALL) &&
(dsc->copy == MACH_MSG_PHYSICAL_COPY) &&
!dsc->deallocate)
msg_flags |= KMSG_TRACE_FLAG_PCPY;
else if (dsc->size <= MSG_OOL_SIZE_SMALL)
msg_flags |= KMSG_TRACE_FLAG_PCPY;
else
msg_flags |= KMSG_TRACE_FLAG_VCPY;
if (is_task_64bit)
msg_size -= 16;
} break;
case MACH_MSG_OOL_PORTS_DESCRIPTOR: {
mach_msg_ool_ports_descriptor_t *dsc;
dsc = (mach_msg_ool_ports_descriptor_t *)&kern_dsc[i];
num_ports += dsc->count;
if (is_task_64bit)
msg_size -= 16;
} break;
default:
break;
}
}
}
trailer = (mach_msg_trailer_t *)((vm_offset_t)msg +
(vm_offset_t)msg->msgh_size);
if (trailer->msgh_trailer_size <= sizeof(mach_msg_security_trailer_t)) {
extern security_token_t KERNEL_SECURITY_TOKEN;
mach_msg_security_trailer_t *strailer;
strailer = (mach_msg_security_trailer_t *)trailer;
if (memcmp(&strailer->msgh_sender,
&KERNEL_SECURITY_TOKEN,
sizeof(KERNEL_SECURITY_TOKEN)) == 0) {
send_pid = 0;
msg_flags &= ~(KMSG_TRACE_FLAG_APP_SRC | KMSG_TRACE_FLAG_DAEMON_SRC);
}
}
KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END,
(uintptr_t)send_pid,
(uintptr_t)dst_pid,
(uintptr_t)msg_size,
(uintptr_t)(
((msg_flags & KMSG_TRACE_FLAGS_MASK) << KMSG_TRACE_FLAGS_SHIFT) |
((num_ports & KMSG_TRACE_PORTS_MASK) << KMSG_TRACE_PORTS_SHIFT)
)
);
}
#endif
zone_t ipc_kmsg_zone;
void ipc_kmsg_clean(
ipc_kmsg_t kmsg);
void ipc_kmsg_clean_body(
ipc_kmsg_t kmsg,
mach_msg_type_number_t number,
mach_msg_descriptor_t *desc);
void ipc_kmsg_clean_partial(
ipc_kmsg_t kmsg,
mach_msg_type_number_t number,
mach_msg_descriptor_t *desc,
vm_offset_t paddr,
vm_size_t length);
mach_msg_return_t ipc_kmsg_copyin_body(
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map);
extern int thread_qos_from_pthread_priority(unsigned long, unsigned long *);
ipc_kmsg_t
ipc_kmsg_alloc(
mach_msg_size_t msg_and_trailer_size)
{
mach_msg_size_t max_expanded_size;
ipc_kmsg_t kmsg;
mach_msg_size_t size = msg_and_trailer_size - MAX_TRAILER_SIZE;
if (size > ipc_kmsg_max_body_space)
return IKM_NULL;
if (size > sizeof(mach_msg_base_t)) {
mach_msg_size_t max_desc = (mach_msg_size_t)(((size - sizeof(mach_msg_base_t)) /
sizeof(mach_msg_ool_descriptor32_t)) *
DESC_SIZE_ADJUSTMENT);
if (msg_and_trailer_size > MACH_MSG_SIZE_MAX - max_desc)
return IKM_NULL;
max_expanded_size = msg_and_trailer_size + max_desc;
} else
max_expanded_size = msg_and_trailer_size;
if (max_expanded_size < IKM_SAVED_MSG_SIZE)
max_expanded_size = IKM_SAVED_MSG_SIZE;
if (max_expanded_size == IKM_SAVED_MSG_SIZE) {
struct ikm_cache *cache;
unsigned int i;
disable_preemption();
cache = &PROCESSOR_DATA(current_processor(), ikm_cache);
if ((i = cache->avail) > 0) {
assert(i <= IKM_STASH);
kmsg = cache->entries[--i];
cache->avail = i;
enable_preemption();
ikm_check_init(kmsg, max_expanded_size);
ikm_set_header(kmsg, msg_and_trailer_size);
return (kmsg);
}
enable_preemption();
kmsg = (ipc_kmsg_t)zalloc(ipc_kmsg_zone);
} else {
kmsg = (ipc_kmsg_t)kalloc(ikm_plus_overhead(max_expanded_size));
}
if (kmsg != IKM_NULL) {
ikm_init(kmsg, max_expanded_size);
ikm_set_header(kmsg, msg_and_trailer_size);
}
return(kmsg);
}
void
ipc_kmsg_free(
ipc_kmsg_t kmsg)
{
mach_msg_size_t size = kmsg->ikm_size;
ipc_port_t port;
assert(!IP_VALID(kmsg->ikm_voucher));
KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_FREE) | DBG_FUNC_NONE,
VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
0, 0, 0, 0);
port = ikm_prealloc_inuse_port(kmsg);
if (port != IP_NULL) {
ip_lock(port);
ikm_prealloc_clear_inuse(kmsg, port);
if (ip_active(port) && (port->ip_premsg == kmsg)) {
assert(IP_PREALLOC(port));
ip_unlock(port);
ip_release(port);
return;
}
ip_unlock(port);
ip_release(port);
}
if (kmsg->ikm_size == IKM_SAVED_MSG_SIZE) {
struct ikm_cache *cache;
unsigned int i;
disable_preemption();
cache = &PROCESSOR_DATA(current_processor(), ikm_cache);
if ((i = cache->avail) < IKM_STASH) {
cache->entries[i] = kmsg;
cache->avail = i + 1;
enable_preemption();
return;
}
enable_preemption();
zfree(ipc_kmsg_zone, kmsg);
return;
}
kfree(kmsg, ikm_plus_overhead(size));
}
void
ipc_kmsg_enqueue(
ipc_kmsg_queue_t queue,
ipc_kmsg_t kmsg)
{
ipc_kmsg_t first = queue->ikmq_base;
ipc_kmsg_t last;
if (first == IKM_NULL) {
queue->ikmq_base = kmsg;
kmsg->ikm_next = kmsg;
kmsg->ikm_prev = kmsg;
} else {
last = first->ikm_prev;
kmsg->ikm_next = first;
kmsg->ikm_prev = last;
first->ikm_prev = kmsg;
last->ikm_next = kmsg;
}
}
boolean_t
ipc_kmsg_enqueue_qos(
ipc_kmsg_queue_t queue,
ipc_kmsg_t kmsg)
{
ipc_kmsg_t first = queue->ikmq_base;
ipc_kmsg_t prev;
mach_msg_priority_t override;
if (first == IKM_NULL) {
queue->ikmq_base = kmsg;
kmsg->ikm_next = kmsg;
kmsg->ikm_prev = kmsg;
return TRUE;
}
prev = first->ikm_prev;
kmsg->ikm_next = first;
kmsg->ikm_prev = prev;
first->ikm_prev = kmsg;
prev->ikm_next = kmsg;
override = kmsg->ikm_qos_override;
while (prev != kmsg &&
override > prev->ikm_qos_override) {
prev->ikm_qos_override = override;
prev = prev->ikm_prev;
}
return (prev == kmsg);
}
boolean_t
ipc_kmsg_override_qos(
ipc_kmsg_queue_t queue,
ipc_kmsg_t kmsg,
mach_msg_priority_t override)
{
ipc_kmsg_t first = queue->ikmq_base;
ipc_kmsg_t cur = kmsg;
while (override > cur->ikm_qos_override) {
cur->ikm_qos_override = override;
if (cur == first)
return TRUE;
cur = cur->ikm_prev;
}
return FALSE;
}
ipc_kmsg_t
ipc_kmsg_dequeue(
ipc_kmsg_queue_t queue)
{
ipc_kmsg_t first;
first = ipc_kmsg_queue_first(queue);
if (first != IKM_NULL)
ipc_kmsg_rmqueue(queue, first);
return first;
}
void
ipc_kmsg_rmqueue(
ipc_kmsg_queue_t queue,
ipc_kmsg_t kmsg)
{
ipc_kmsg_t next, prev;
assert(queue->ikmq_base != IKM_NULL);
next = kmsg->ikm_next;
prev = kmsg->ikm_prev;
if (next == kmsg) {
assert(prev == kmsg);
assert(queue->ikmq_base == kmsg);
queue->ikmq_base = IKM_NULL;
} else {
if (__improbable(next->ikm_prev != kmsg || prev->ikm_next != kmsg)) {
panic("ipc_kmsg_rmqueue: inconsistent prev/next pointers. "
"(prev->next: %p, next->prev: %p, kmsg: %p)",
prev->ikm_next, next->ikm_prev, kmsg);
}
if (queue->ikmq_base == kmsg)
queue->ikmq_base = next;
next->ikm_prev = prev;
prev->ikm_next = next;
}
assert((kmsg->ikm_next = IKM_BOGUS) == IKM_BOGUS);
assert((kmsg->ikm_prev = IKM_BOGUS) == IKM_BOGUS);
}
ipc_kmsg_t
ipc_kmsg_queue_next(
ipc_kmsg_queue_t queue,
ipc_kmsg_t kmsg)
{
ipc_kmsg_t next;
assert(queue->ikmq_base != IKM_NULL);
next = kmsg->ikm_next;
if (queue->ikmq_base == next)
next = IKM_NULL;
return next;
}
void
ipc_kmsg_destroy(
ipc_kmsg_t kmsg)
{
if (ipc_kmsg_delayed_destroy(kmsg))
ipc_kmsg_reap_delayed();
}
boolean_t ipc_kmsg_delayed_destroy(
ipc_kmsg_t kmsg)
{
ipc_kmsg_queue_t queue = &(current_thread()->ith_messages);
boolean_t first = ipc_kmsg_queue_empty(queue);
ipc_kmsg_enqueue(queue, kmsg);
return first;
}
void
ipc_kmsg_reap_delayed(void)
{
ipc_kmsg_queue_t queue = &(current_thread()->ith_messages);
ipc_kmsg_t kmsg;
while ((kmsg = ipc_kmsg_queue_first(queue)) != IKM_NULL) {
ipc_kmsg_clean(kmsg);
ipc_kmsg_rmqueue(queue, kmsg);
ipc_kmsg_free(kmsg);
}
}
static unsigned int _ipc_kmsg_clean_invalid_desc = 0;
void
ipc_kmsg_clean_body(
__unused ipc_kmsg_t kmsg,
mach_msg_type_number_t number,
mach_msg_descriptor_t *saddr)
{
mach_msg_type_number_t i;
if ( number == 0 )
return;
for (i = 0 ; i < number; i++, saddr++ ) {
switch (saddr->type.type) {
case MACH_MSG_PORT_DESCRIPTOR: {
mach_msg_port_descriptor_t *dsc;
dsc = &saddr->port;
if (!IO_VALID((ipc_object_t) dsc->name))
continue;
ipc_object_destroy((ipc_object_t) dsc->name, dsc->disposition);
break;
}
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR : {
mach_msg_ool_descriptor_t *dsc;
dsc = (mach_msg_ool_descriptor_t *)&saddr->out_of_line;
if (dsc->size == 0) {
assert(dsc->address == (void *) 0);
} else {
vm_map_copy_discard((vm_map_copy_t) dsc->address);
}
break;
}
case MACH_MSG_OOL_PORTS_DESCRIPTOR : {
ipc_object_t *objects;
mach_msg_type_number_t j;
mach_msg_ool_ports_descriptor_t *dsc;
dsc = (mach_msg_ool_ports_descriptor_t *)&saddr->ool_ports;
objects = (ipc_object_t *) dsc->address;
if (dsc->count == 0) {
break;
}
assert(objects != (ipc_object_t *) 0);
for (j = 0; j < dsc->count; j++) {
ipc_object_t object = objects[j];
if (!IO_VALID(object))
continue;
ipc_object_destroy(object, dsc->disposition);
}
assert(dsc->count != 0);
kfree(dsc->address,
(vm_size_t) dsc->count * sizeof(mach_port_t));
break;
}
default : {
_ipc_kmsg_clean_invalid_desc++;
}
}
}
}
void
ipc_kmsg_clean_partial(
ipc_kmsg_t kmsg,
mach_msg_type_number_t number,
mach_msg_descriptor_t *desc,
vm_offset_t paddr,
vm_size_t length)
{
ipc_object_t object;
mach_msg_bits_t mbits = kmsg->ikm_header->msgh_bits;
ipc_importance_clean(kmsg);
object = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
assert(IO_VALID(object));
ipc_object_destroy_dest(object, MACH_MSGH_BITS_REMOTE(mbits));
object = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
if (IO_VALID(object))
ipc_object_destroy(object, MACH_MSGH_BITS_LOCAL(mbits));
object = (ipc_object_t) kmsg->ikm_voucher;
if (IO_VALID(object)) {
assert(MACH_MSGH_BITS_VOUCHER(mbits) == MACH_MSG_TYPE_MOVE_SEND);
ipc_object_destroy(object, MACH_MSG_TYPE_PORT_SEND);
kmsg->ikm_voucher = IP_NULL;
}
if (paddr) {
(void) vm_deallocate(ipc_kernel_copy_map, paddr, length);
}
ipc_kmsg_clean_body(kmsg, number, desc);
}
void
ipc_kmsg_clean(
ipc_kmsg_t kmsg)
{
ipc_object_t object;
mach_msg_bits_t mbits;
ipc_importance_clean(kmsg);
mbits = kmsg->ikm_header->msgh_bits;
object = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
if (IO_VALID(object))
ipc_object_destroy_dest(object, MACH_MSGH_BITS_REMOTE(mbits));
object = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
if (IO_VALID(object))
ipc_object_destroy(object, MACH_MSGH_BITS_LOCAL(mbits));
object = (ipc_object_t) kmsg->ikm_voucher;
if (IO_VALID(object)) {
assert(MACH_MSGH_BITS_VOUCHER(mbits) == MACH_MSG_TYPE_MOVE_SEND);
ipc_object_destroy(object, MACH_MSG_TYPE_PORT_SEND);
kmsg->ikm_voucher = IP_NULL;
}
if (mbits & MACH_MSGH_BITS_COMPLEX) {
mach_msg_body_t *body;
body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
ipc_kmsg_clean_body(kmsg, body->msgh_descriptor_count,
(mach_msg_descriptor_t *)(body + 1));
}
}
void
ipc_kmsg_set_prealloc(
ipc_kmsg_t kmsg,
ipc_port_t port)
{
assert(kmsg->ikm_prealloc == IP_NULL);
kmsg->ikm_prealloc = IP_NULL;
imq_lock(&port->ip_messages);
for (int i = 0; i < THREAD_QOS_LAST; i++) {
kmsg->sync_qos[i] = port_sync_qos(port, i);
}
kmsg->special_port_qos = port_special_qos(port);
IP_SET_PREALLOC(port, kmsg);
imq_unlock(&port->ip_messages);
}
void
ipc_kmsg_clear_prealloc(
ipc_kmsg_t kmsg,
ipc_port_t port)
{
assert(kmsg->ikm_prealloc == port);
kmsg->ikm_prealloc = IP_NULL;
imq_lock(&port->ip_messages);
IP_CLEAR_PREALLOC(port, kmsg);
for (int i = 0; i < THREAD_QOS_LAST; i++) {
set_port_sync_qos(port, i, kmsg->sync_qos[i]);
}
set_port_special_qos(port, kmsg->special_port_qos);
imq_unlock(&port->ip_messages);
}
ipc_kmsg_t
ipc_kmsg_prealloc(mach_msg_size_t size)
{
#if defined(__LP64__)
if (size > MACH_MSG_SIZE_MAX - LEGACY_HEADER_SIZE_DELTA)
return IKM_NULL;
size += LEGACY_HEADER_SIZE_DELTA;
#endif
return ipc_kmsg_alloc(size);
}
mach_msg_return_t
ipc_kmsg_get(
mach_vm_address_t msg_addr,
mach_msg_size_t size,
ipc_kmsg_t *kmsgp)
{
mach_msg_size_t msg_and_trailer_size;
ipc_kmsg_t kmsg;
mach_msg_max_trailer_t *trailer;
mach_msg_legacy_base_t legacy_base;
mach_msg_size_t len_copied;
legacy_base.body.msgh_descriptor_count = 0;
if ((size < sizeof(mach_msg_legacy_header_t)) || (size & 3))
return MACH_SEND_MSG_TOO_SMALL;
if (size > ipc_kmsg_max_body_space)
return MACH_SEND_TOO_LARGE;
if(size == sizeof(mach_msg_legacy_header_t))
len_copied = sizeof(mach_msg_legacy_header_t);
else
len_copied = sizeof(mach_msg_legacy_base_t);
if (copyinmsg(msg_addr, (char *)&legacy_base, len_copied))
return MACH_SEND_INVALID_DATA;
if (len_copied < sizeof(mach_msg_legacy_base_t) &&
(legacy_base.header.msgh_bits & MACH_MSGH_BITS_COMPLEX))
return MACH_SEND_MSG_TOO_SMALL;
msg_addr += sizeof(legacy_base.header);
#if defined(__LP64__)
size += LEGACY_HEADER_SIZE_DELTA;
#endif
__unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) {
unsigned int j;
for (j=0; j<sizeof(legacy_base.header); j++) {
kprintf("%02x\n", ((unsigned char*)&legacy_base.header)[j]);
}
}
__unreachable_ok_pop
msg_and_trailer_size = size + MAX_TRAILER_SIZE;
kmsg = ipc_kmsg_alloc(msg_and_trailer_size);
if (kmsg == IKM_NULL)
return MACH_SEND_NO_BUFFER;
kmsg->ikm_header->msgh_size = size;
kmsg->ikm_header->msgh_bits = legacy_base.header.msgh_bits;
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(legacy_base.header.msgh_remote_port);
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(legacy_base.header.msgh_local_port);
kmsg->ikm_header->msgh_voucher_port = legacy_base.header.msgh_voucher_port;
kmsg->ikm_header->msgh_id = legacy_base.header.msgh_id;
DEBUG_KPRINT_SYSCALL_IPC("ipc_kmsg_get header:\n"
" size: 0x%.8x\n"
" bits: 0x%.8x\n"
" remote_port: %p\n"
" local_port: %p\n"
" voucher_port: 0x%.8x\n"
" id: %.8d\n",
kmsg->ikm_header->msgh_size,
kmsg->ikm_header->msgh_bits,
kmsg->ikm_header->msgh_remote_port,
kmsg->ikm_header->msgh_local_port,
kmsg->ikm_header->msgh_voucher_port,
kmsg->ikm_header->msgh_id);
if (copyinmsg(msg_addr, (char *)(kmsg->ikm_header + 1), size - (mach_msg_size_t)sizeof(mach_msg_header_t))) {
ipc_kmsg_free(kmsg);
return MACH_SEND_INVALID_DATA;
}
__unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK))
{
kprintf("body: size: %lu\n", (size - sizeof(mach_msg_header_t)));
uint32_t i;
for(i=0;i*4 < (size - sizeof(mach_msg_header_t));i++)
{
kprintf("%.4x\n",((uint32_t *)(kmsg->ikm_header + 1))[i]);
}
}
__unreachable_ok_pop
DEBUG_IPC_KMSG_PRINT(kmsg, "ipc_kmsg_get()");
trailer = (mach_msg_max_trailer_t *) ((vm_offset_t)kmsg->ikm_header + size);
trailer->msgh_sender = current_thread()->task->sec_token;
trailer->msgh_audit = current_thread()->task->audit_token;
trailer->msgh_trailer_type = MACH_MSG_TRAILER_FORMAT_0;
trailer->msgh_trailer_size = MACH_MSG_TRAILER_MINIMUM_SIZE;
#ifdef ppc
if(trcWork.traceMask) dbgTrace(0x1100, (unsigned int)kmsg->ikm_header->msgh_id,
(unsigned int)kmsg->ikm_header->msgh_remote_port,
(unsigned int)kmsg->ikm_header->msgh_local_port, 0);
#endif
trailer->msgh_labels.sender = 0;
*kmsgp = kmsg;
return MACH_MSG_SUCCESS;
}
mach_msg_return_t
ipc_kmsg_get_from_kernel(
mach_msg_header_t *msg,
mach_msg_size_t size,
ipc_kmsg_t *kmsgp)
{
ipc_kmsg_t kmsg;
mach_msg_size_t msg_and_trailer_size;
mach_msg_max_trailer_t *trailer;
ipc_port_t dest_port;
assert(size >= sizeof(mach_msg_header_t));
assert((size & 3) == 0);
dest_port = (ipc_port_t)msg->msgh_remote_port;
msg_and_trailer_size = size + MAX_TRAILER_SIZE;
if (IP_VALID(dest_port) && IP_PREALLOC(dest_port)) {
mach_msg_size_t max_desc = 0;
ip_lock(dest_port);
if (!ip_active(dest_port)) {
ip_unlock(dest_port);
return MACH_SEND_NO_BUFFER;
}
assert(IP_PREALLOC(dest_port));
kmsg = dest_port->ip_premsg;
if (ikm_prealloc_inuse(kmsg)) {
ip_unlock(dest_port);
return MACH_SEND_NO_BUFFER;
}
#if !defined(__LP64__)
if (msg->msgh_bits & MACH_MSGH_BITS_COMPLEX) {
assert(size > sizeof(mach_msg_base_t));
max_desc = ((mach_msg_base_t *)msg)->body.msgh_descriptor_count *
DESC_SIZE_ADJUSTMENT;
}
#endif
if (msg_and_trailer_size > kmsg->ikm_size - max_desc) {
ip_unlock(dest_port);
return MACH_SEND_TOO_LARGE;
}
ikm_prealloc_set_inuse(kmsg, dest_port);
ikm_set_header(kmsg, msg_and_trailer_size);
ip_unlock(dest_port);
}
else
{
kmsg = ipc_kmsg_alloc(msg_and_trailer_size);
if (kmsg == IKM_NULL)
return MACH_SEND_NO_BUFFER;
}
(void) memcpy((void *) kmsg->ikm_header, (const void *) msg, size);
ikm_qos_init(kmsg);
kmsg->ikm_header->msgh_size = size;
trailer = (mach_msg_max_trailer_t *)
((vm_offset_t)kmsg->ikm_header + size);
trailer->msgh_sender = KERNEL_SECURITY_TOKEN;
trailer->msgh_audit = KERNEL_AUDIT_TOKEN;
trailer->msgh_trailer_type = MACH_MSG_TRAILER_FORMAT_0;
trailer->msgh_trailer_size = MACH_MSG_TRAILER_MINIMUM_SIZE;
trailer->msgh_labels.sender = 0;
*kmsgp = kmsg;
return MACH_MSG_SUCCESS;
}
mach_msg_return_t
ipc_kmsg_send(
ipc_kmsg_t kmsg,
mach_msg_option_t option,
mach_msg_timeout_t send_timeout)
{
ipc_port_t port;
thread_t th = current_thread();
mach_msg_return_t error = MACH_MSG_SUCCESS;
boolean_t kernel_reply = FALSE;
if ((th->options & TH_OPT_HONOR_QLIMIT) == TH_OPT_HONOR_QLIMIT) {
option &= (~MACH_SEND_ALWAYS);
option |= MACH_SEND_TIMEOUT;
th->options &= (~TH_OPT_HONOR_QLIMIT);
}
#if IMPORTANCE_INHERITANCE
boolean_t did_importance = FALSE;
#if IMPORTANCE_TRACE
mach_msg_id_t imp_msgh_id = -1;
int sender_pid = -1;
#endif
#endif
if (kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_CIRCULAR) {
ipc_kmsg_destroy(kmsg);
KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, MACH_MSGH_BITS_CIRCULAR);
return MACH_MSG_SUCCESS;
}
ipc_voucher_send_preprocessing(kmsg);
port = (ipc_port_t) kmsg->ikm_header->msgh_remote_port;
assert(IP_VALID(port));
ip_lock(port);
#if IMPORTANCE_INHERITANCE
retry:
#endif
if (!ip_active(port)) {
ip_unlock(port);
#if MACH_FLIPC
if (MACH_NODE_VALID(kmsg->ikm_node) && FPORT_VALID(port->ip_messages.imq_fport))
flipc_msg_ack(kmsg->ikm_node, &port->ip_messages, FALSE);
#endif
ip_release(port);
kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
ipc_kmsg_destroy(kmsg);
KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, MACH_SEND_INVALID_DEST);
return MACH_MSG_SUCCESS;
}
if (port->ip_receiver == ipc_space_kernel) {
assert(ip_active(port));
port->ip_messages.imq_seqno++;
ip_unlock(port);
current_task()->messages_sent++;
kmsg = ipc_kobject_server(kmsg, option);
if (kmsg == IKM_NULL)
return MACH_MSG_SUCCESS;
KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_START);
port = (ipc_port_t) kmsg->ikm_header->msgh_remote_port;
assert(IP_VALID(port));
ip_lock(port);
kernel_reply = TRUE;
if (!ip_active(port))
error = MACH_SEND_INVALID_DEST;
}
#if IMPORTANCE_INHERITANCE
if (did_importance == FALSE) {
did_importance = TRUE;
if (ipc_importance_send(kmsg, option))
goto retry;
}
#endif
if (error != MACH_MSG_SUCCESS) {
ip_unlock(port);
} else {
imq_lock(&port->ip_messages);
ip_unlock(port);
error = ipc_mqueue_send(&port->ip_messages, kmsg, option,
send_timeout);
}
#if IMPORTANCE_INHERITANCE
if (did_importance == TRUE) {
__unused int importance_cleared = 0;
switch (error) {
case MACH_SEND_TIMED_OUT:
case MACH_SEND_NO_BUFFER:
case MACH_SEND_INTERRUPTED:
case MACH_SEND_INVALID_DEST:
importance_cleared = 1;
ipc_importance_clean(kmsg);
break;
case MACH_MSG_SUCCESS:
default:
break;
}
#if IMPORTANCE_TRACE
KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE, (IMPORTANCE_CODE(IMP_MSG, IMP_MSG_SEND)) | DBG_FUNC_END,
task_pid(current_task()), sender_pid, imp_msgh_id, importance_cleared, 0);
#endif
}
#endif
if (error == MACH_SEND_INVALID_DEST) {
#if MACH_FLIPC
if (MACH_NODE_VALID(kmsg->ikm_node) && FPORT_VALID(port->ip_messages.imq_fport))
flipc_msg_ack(kmsg->ikm_node, &port->ip_messages, FALSE);
#endif
ip_release(port);
kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
ipc_kmsg_destroy(kmsg);
KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, MACH_SEND_INVALID_DEST);
return MACH_MSG_SUCCESS;
}
if (error != MACH_MSG_SUCCESS && kernel_reply) {
#if MACH_FLIPC
if (MACH_NODE_VALID(kmsg->ikm_node) && FPORT_VALID(port->ip_messages.imq_fport))
flipc_msg_ack(kmsg->ikm_node, &port->ip_messages, FALSE);
#endif
ip_release(port);
kmsg->ikm_header->msgh_remote_port = MACH_PORT_NULL;
ipc_kmsg_destroy(kmsg);
KDBG(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_INFO) | DBG_FUNC_END, error);
return MACH_MSG_SUCCESS;
}
return error;
}
mach_msg_return_t
ipc_kmsg_put(
ipc_kmsg_t kmsg,
mach_msg_option_t option,
mach_vm_address_t rcv_addr,
mach_msg_size_t rcv_size,
mach_msg_size_t trailer_size,
mach_msg_size_t *sizep)
{
mach_msg_size_t size = kmsg->ikm_header->msgh_size + trailer_size;
mach_msg_return_t mr;
DEBUG_IPC_KMSG_PRINT(kmsg, "ipc_kmsg_put()");
DEBUG_KPRINT_SYSCALL_IPC("ipc_kmsg_put header:\n"
" size: 0x%.8x\n"
" bits: 0x%.8x\n"
" remote_port: %p\n"
" local_port: %p\n"
" voucher_port: 0x%.8x\n"
" id: %.8d\n",
kmsg->ikm_header->msgh_size,
kmsg->ikm_header->msgh_bits,
kmsg->ikm_header->msgh_remote_port,
kmsg->ikm_header->msgh_local_port,
kmsg->ikm_header->msgh_voucher_port,
kmsg->ikm_header->msgh_id);
#if defined(__LP64__)
if (current_task() != kernel_task) {
mach_msg_legacy_header_t *legacy_header =
(mach_msg_legacy_header_t *)((vm_offset_t)(kmsg->ikm_header) + LEGACY_HEADER_SIZE_DELTA);
mach_msg_bits_t bits = kmsg->ikm_header->msgh_bits;
mach_msg_size_t msg_size = kmsg->ikm_header->msgh_size;
mach_port_name_t remote_port = CAST_MACH_PORT_TO_NAME(kmsg->ikm_header->msgh_remote_port);
mach_port_name_t local_port = CAST_MACH_PORT_TO_NAME(kmsg->ikm_header->msgh_local_port);
mach_port_name_t voucher_port = kmsg->ikm_header->msgh_voucher_port;
mach_msg_id_t id = kmsg->ikm_header->msgh_id;
legacy_header->msgh_id = id;
legacy_header->msgh_local_port = local_port;
legacy_header->msgh_remote_port = remote_port;
legacy_header->msgh_voucher_port = voucher_port;
legacy_header->msgh_size = msg_size - LEGACY_HEADER_SIZE_DELTA;
legacy_header->msgh_bits = bits;
size -= LEGACY_HEADER_SIZE_DELTA;
kmsg->ikm_header = (mach_msg_header_t *)legacy_header;
}
#endif
__unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK)) {
kprintf("ipc_kmsg_put header+body: %d\n", (size));
uint32_t i;
for(i=0;i*4 < size;i++)
{
kprintf("%.4x\n",((uint32_t *)kmsg->ikm_header)[i]);
}
kprintf("type: %d\n", ((mach_msg_type_descriptor_t *)(((mach_msg_base_t *)kmsg->ikm_header)+1))->type);
}
__unreachable_ok_pop
if (option & MACH_RCV_STACK) {
rcv_addr += rcv_size - size;
}
if (copyoutmsg((const char *) kmsg->ikm_header, rcv_addr, size)) {
mr = MACH_RCV_INVALID_DATA;
size = 0;
} else
mr = MACH_MSG_SUCCESS;
KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_KMSG_LINK) | DBG_FUNC_NONE,
(rcv_addr >= VM_MIN_KERNEL_AND_KEXT_ADDRESS ||
rcv_addr + size >= VM_MIN_KERNEL_AND_KEXT_ADDRESS) ? (uintptr_t)0 : (uintptr_t)rcv_addr,
VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
1 ,
0,
0);
ipc_kmsg_free(kmsg);
if (sizep)
*sizep = size;
return mr;
}
void
ipc_kmsg_put_to_kernel(
mach_msg_header_t *msg,
ipc_kmsg_t kmsg,
mach_msg_size_t size)
{
(void) memcpy((void *) msg, (const void *) kmsg->ikm_header, size);
ipc_kmsg_free(kmsg);
}
unsigned long pthread_priority_canonicalize(unsigned long priority, boolean_t propagation);
static kern_return_t
ipc_kmsg_set_qos(
ipc_kmsg_t kmsg,
mach_msg_option_t options,
mach_msg_priority_t override)
{
kern_return_t kr;
unsigned long flags = 0;
ipc_port_t special_reply_port = kmsg->ikm_header->msgh_local_port;
ipc_port_t dest_port = kmsg->ikm_header->msgh_remote_port;
kr = ipc_get_pthpriority_from_kmsg_voucher(kmsg, &kmsg->ikm_qos);
if (kr != KERN_SUCCESS) {
kmsg->ikm_qos = MACH_MSG_PRIORITY_UNSPECIFIED;
}
kmsg->ikm_qos_override = kmsg->ikm_qos;
if (options & MACH_SEND_OVERRIDE) {
unsigned long canonical;
mach_msg_priority_t canon;
canonical = pthread_priority_canonicalize(override, TRUE);
canon = (mach_msg_priority_t)canonical;
if (canon > kmsg->ikm_qos)
kmsg->ikm_qos_override = canon;
}
kr = KERN_SUCCESS;
if ((options & MACH_SEND_SYNC_OVERRIDE)) {
if (IP_VALID(special_reply_port) &&
MACH_MSGH_BITS_LOCAL(kmsg->ikm_header->msgh_bits) == MACH_MSG_TYPE_PORT_SEND_ONCE) {
kr = ipc_port_link_special_reply_port_with_qos(special_reply_port, dest_port,
thread_qos_from_pthread_priority(kmsg->ikm_qos, &flags));
} else {
kr = KERN_FAILURE;
}
}
return kr;
}
mach_msg_return_t
ipc_kmsg_copyin_header(
ipc_kmsg_t kmsg,
ipc_space_t space,
mach_msg_priority_t override,
mach_msg_option_t *optionp)
{
mach_msg_header_t *msg = kmsg->ikm_header;
mach_msg_bits_t mbits = msg->msgh_bits & MACH_MSGH_BITS_USER;
mach_port_name_t dest_name = CAST_MACH_PORT_TO_NAME(msg->msgh_remote_port);
mach_port_name_t reply_name = CAST_MACH_PORT_TO_NAME(msg->msgh_local_port);
mach_port_name_t voucher_name = MACH_PORT_NULL;
kern_return_t kr;
mach_msg_type_name_t dest_type = MACH_MSGH_BITS_REMOTE(mbits);
mach_msg_type_name_t reply_type = MACH_MSGH_BITS_LOCAL(mbits);
mach_msg_type_name_t voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
ipc_object_t dest_port = IO_NULL;
ipc_object_t reply_port = IO_NULL;
ipc_port_t dest_soright = IP_NULL;
ipc_port_t reply_soright = IP_NULL;
ipc_port_t voucher_soright = IP_NULL;
ipc_port_t release_port = IP_NULL;
ipc_port_t voucher_port = IP_NULL;
ipc_port_t voucher_release_port = IP_NULL;
ipc_entry_t dest_entry = IE_NULL;
ipc_entry_t reply_entry = IE_NULL;
ipc_entry_t voucher_entry = IE_NULL;
int assertcnt = 0;
#if IMPORTANCE_INHERITANCE
boolean_t needboost = FALSE;
#endif
if ((mbits != msg->msgh_bits) ||
(!MACH_MSG_TYPE_PORT_ANY_SEND(dest_type)) ||
((reply_type == 0) ?
(reply_name != MACH_PORT_NULL) :
!MACH_MSG_TYPE_PORT_ANY_SEND(reply_type)))
return MACH_SEND_INVALID_HEADER;
if (!MACH_PORT_VALID(dest_name))
return MACH_SEND_INVALID_DEST;
is_write_lock(space);
if (!is_active(space)) {
is_write_unlock(space);
return MACH_SEND_INVALID_DEST;
}
if (voucher_type != MACH_MSGH_BITS_ZERO) {
voucher_name = msg->msgh_voucher_port;
if (voucher_name == MACH_PORT_DEAD ||
(voucher_type != MACH_MSG_TYPE_MOVE_SEND &&
voucher_type != MACH_MSG_TYPE_COPY_SEND)) {
is_write_unlock(space);
return MACH_SEND_INVALID_VOUCHER;
}
if (voucher_name != MACH_PORT_NULL) {
voucher_entry = ipc_entry_lookup(space, voucher_name);
if (voucher_entry == IE_NULL ||
(voucher_entry->ie_bits & MACH_PORT_TYPE_SEND) == 0 ||
io_kotype(voucher_entry->ie_object) != IKOT_VOUCHER) {
is_write_unlock(space);
return MACH_SEND_INVALID_VOUCHER;
}
} else {
voucher_type = MACH_MSG_TYPE_MOVE_SEND;
}
}
if (dest_name == voucher_name) {
dest_entry = voucher_entry;
if (dest_entry == IE_NULL) {
goto invalid_dest;
}
if (MACH_PORT_VALID(reply_name)) {
assert(reply_type != 0);
if (voucher_name == reply_name) {
goto invalid_reply;
}
reply_entry = ipc_entry_lookup(space, reply_name);
if (reply_entry == IE_NULL) {
goto invalid_reply;
}
assert(dest_entry != reply_entry);
if (!ipc_right_copyin_check(space, reply_name, reply_entry, reply_type)) {
goto invalid_reply;
}
}
kr = ipc_right_copyin_two(space, dest_name, dest_entry,
dest_type, voucher_type,
&dest_port, &dest_soright,
&release_port);
if (kr != KERN_SUCCESS) {
assert(kr != KERN_INVALID_CAPABILITY);
goto invalid_dest;
}
voucher_port = (ipc_port_t)dest_port;
assert(dest_type != MACH_MSG_TYPE_MAKE_SEND);
assert(dest_type != MACH_MSG_TYPE_MAKE_SEND_ONCE);
assert(dest_type != MACH_MSG_TYPE_MOVE_SEND_ONCE);
if (reply_entry != IE_NULL) {
kr = ipc_right_copyin(space, reply_name, reply_entry,
reply_type, TRUE,
&reply_port, &reply_soright,
&release_port, &assertcnt);
assert(assertcnt == 0);
assert(kr == KERN_SUCCESS);
}
} else {
if (dest_name == reply_name) {
dest_entry = ipc_entry_lookup(space, dest_name);
if (dest_entry == IE_NULL) {
goto invalid_dest;
}
reply_entry = dest_entry;
assert(reply_type != 0);
kr = ipc_right_copyin_two(space, dest_name, dest_entry,
dest_type, reply_type,
&dest_port, &dest_soright,
&release_port);
if (kr == KERN_INVALID_CAPABILITY) {
goto invalid_reply;
} else if (kr != KERN_SUCCESS) {
goto invalid_dest;
}
reply_port = dest_port;
} else {
dest_entry = ipc_entry_lookup(space, dest_name);
if (dest_entry == IE_NULL) {
goto invalid_dest;
}
assert(dest_entry != voucher_entry);
if (MACH_PORT_VALID(reply_name)) {
if (reply_name == voucher_name) {
goto invalid_reply;
}
reply_entry = ipc_entry_lookup(space, reply_name);
if (reply_entry == IE_NULL) {
goto invalid_reply;
}
assert(dest_entry != reply_entry);
assert(reply_type != 0);
if (!ipc_right_copyin_check(space, reply_name, reply_entry, reply_type)) {
goto invalid_reply;
}
}
kr = ipc_right_copyin(space, dest_name, dest_entry,
dest_type, FALSE,
&dest_port, &dest_soright,
&release_port, &assertcnt);
assert(assertcnt == 0);
if (kr != KERN_SUCCESS) {
goto invalid_dest;
}
assert(IO_VALID(dest_port));
assert(!IP_VALID(release_port));
if (MACH_PORT_VALID(reply_name)) {
kr = ipc_right_copyin(space, reply_name, reply_entry,
reply_type, TRUE,
&reply_port, &reply_soright,
&release_port, &assertcnt);
assert(assertcnt == 0);
assert(kr == KERN_SUCCESS);
} else {
reply_port = (ipc_object_t)CAST_MACH_NAME_TO_PORT(reply_name);
}
}
if (IE_NULL != voucher_entry) {
kr = ipc_right_copyin(space, voucher_name, voucher_entry,
voucher_type, FALSE,
(ipc_object_t *)&voucher_port,
&voucher_soright,
&voucher_release_port,
&assertcnt);
assert(assertcnt == 0);
assert(KERN_SUCCESS == kr);
assert(IP_VALID(voucher_port));
assert(ip_active(voucher_port));
}
}
assert(IE_NULL != dest_entry);
if (IE_NULL != reply_entry)
assert(reply_entry != voucher_entry);
if (IE_BITS_TYPE(dest_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
ipc_entry_dealloc(space, dest_name, dest_entry);
if (dest_entry == reply_entry) {
reply_entry = IE_NULL;
}
if (dest_entry == voucher_entry) {
voucher_entry = IE_NULL;
}
dest_entry = IE_NULL;
}
if (IE_NULL != reply_entry &&
IE_BITS_TYPE(reply_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
ipc_entry_dealloc(space, reply_name, reply_entry);
reply_entry = IE_NULL;
}
if (IE_NULL != voucher_entry &&
IE_BITS_TYPE(voucher_entry->ie_bits) == MACH_PORT_TYPE_NONE) {
ipc_entry_dealloc(space, voucher_name, voucher_entry);
voucher_entry = IE_NULL;
}
dest_type = ipc_object_copyin_type(dest_type);
reply_type = ipc_object_copyin_type(reply_type);
if (((*optionp & MACH_SEND_NOTIFY) != 0) &&
dest_type != MACH_MSG_TYPE_PORT_SEND_ONCE &&
dest_entry != IE_NULL && dest_entry->ie_request != IE_REQ_NONE) {
ipc_port_t dport = (ipc_port_t)dest_port;
assert(dport != IP_NULL);
ip_lock(dport);
if (ip_active(dport) && dport->ip_receiver != ipc_space_kernel) {
if (ip_full(dport)) {
#if IMPORTANCE_INHERITANCE
needboost = ipc_port_request_sparm(dport, dest_name,
dest_entry->ie_request,
*optionp,
override);
if (needboost == FALSE)
ip_unlock(dport);
#else
ipc_port_request_sparm(dport, dest_name,
dest_entry->ie_request,
*optionp,
override);
ip_unlock(dport);
#endif
} else {
*optionp |= MACH_SEND_ALWAYS;
ip_unlock(dport);
}
} else {
ip_unlock(dport);
}
}
is_write_unlock(space);
#if IMPORTANCE_INHERITANCE
if (needboost == TRUE) {
ipc_port_t dport = (ipc_port_t)dest_port;
if (ipc_port_importance_delta(dport, IPID_OPTION_SENDPOSSIBLE, 1) == FALSE) {
ip_unlock(dport);
}
}
#endif
if (dest_soright != IP_NULL) {
ipc_notify_port_deleted(dest_soright, dest_name);
}
if (reply_soright != IP_NULL) {
ipc_notify_port_deleted(reply_soright, reply_name);
}
if (voucher_soright != IP_NULL) {
ipc_notify_port_deleted(voucher_soright, voucher_name);
}
if (IP_VALID(voucher_port)) {
kmsg->ikm_voucher = voucher_port;
voucher_type = MACH_MSG_TYPE_MOVE_SEND;
}
msg->msgh_bits = MACH_MSGH_BITS_SET(dest_type, reply_type, voucher_type, mbits);
msg->msgh_remote_port = (ipc_port_t)dest_port;
msg->msgh_local_port = (ipc_port_t)reply_port;
ipc_kmsg_set_qos(kmsg, *optionp, override);
if (release_port != IP_NULL)
ip_release(release_port);
if (voucher_release_port != IP_NULL)
ip_release(voucher_release_port);
return MACH_MSG_SUCCESS;
invalid_reply:
is_write_unlock(space);
if (release_port != IP_NULL)
ip_release(release_port);
assert(voucher_port == IP_NULL);
assert(voucher_soright == IP_NULL);
return MACH_SEND_INVALID_REPLY;
invalid_dest:
is_write_unlock(space);
if (release_port != IP_NULL)
ip_release(release_port);
if (reply_soright != IP_NULL)
ipc_notify_port_deleted(reply_soright, reply_name);
assert(voucher_port == IP_NULL);
assert(voucher_soright == IP_NULL);
return MACH_SEND_INVALID_DEST;
}
mach_msg_descriptor_t *ipc_kmsg_copyin_port_descriptor(
volatile mach_msg_port_descriptor_t *dsc,
mach_msg_legacy_port_descriptor_t *user_dsc,
ipc_space_t space,
ipc_object_t dest,
ipc_kmsg_t kmsg,
mach_msg_return_t *mr);
void ipc_print_type_name(
int type_name);
mach_msg_descriptor_t *
ipc_kmsg_copyin_port_descriptor(
volatile mach_msg_port_descriptor_t *dsc,
mach_msg_legacy_port_descriptor_t *user_dsc_in,
ipc_space_t space,
ipc_object_t dest,
ipc_kmsg_t kmsg,
mach_msg_return_t *mr)
{
volatile mach_msg_legacy_port_descriptor_t *user_dsc = user_dsc_in;
mach_msg_type_name_t user_disp;
mach_msg_type_name_t result_disp;
mach_port_name_t name;
ipc_object_t object;
user_disp = user_dsc->disposition;
result_disp = ipc_object_copyin_type(user_disp);
name = (mach_port_name_t)user_dsc->name;
if (MACH_PORT_VALID(name)) {
kern_return_t kr = ipc_object_copyin(space, name, user_disp, &object);
if (kr != KERN_SUCCESS) {
*mr = MACH_SEND_INVALID_RIGHT;
return NULL;
}
if ((result_disp == MACH_MSG_TYPE_PORT_RECEIVE) &&
ipc_port_check_circularity((ipc_port_t) object,
(ipc_port_t) dest)) {
kmsg->ikm_header->msgh_bits |= MACH_MSGH_BITS_CIRCULAR;
}
dsc->name = (ipc_port_t) object;
} else {
dsc->name = CAST_MACH_NAME_TO_PORT(name);
}
dsc->disposition = result_disp;
dsc->type = MACH_MSG_PORT_DESCRIPTOR;
dsc->pad_end = 0;
return (mach_msg_descriptor_t *)(user_dsc_in+1);
}
mach_msg_descriptor_t * ipc_kmsg_copyin_ool_descriptor(
mach_msg_ool_descriptor_t *dsc,
mach_msg_descriptor_t *user_dsc,
int is_64bit,
vm_offset_t *paddr,
vm_map_copy_t *copy,
vm_size_t *space_needed,
vm_map_t map,
mach_msg_return_t *mr);
mach_msg_descriptor_t *
ipc_kmsg_copyin_ool_descriptor(
mach_msg_ool_descriptor_t *dsc,
mach_msg_descriptor_t *user_dsc,
int is_64bit,
vm_offset_t *paddr,
vm_map_copy_t *copy,
vm_size_t *space_needed,
vm_map_t map,
mach_msg_return_t *mr)
{
vm_size_t length;
boolean_t dealloc;
mach_msg_copy_options_t copy_options;
mach_vm_offset_t addr;
mach_msg_descriptor_type_t dsc_type;
if (is_64bit) {
mach_msg_ool_descriptor64_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
addr = (mach_vm_offset_t) user_ool_dsc->address;
length = user_ool_dsc->size;
dealloc = user_ool_dsc->deallocate;
copy_options = user_ool_dsc->copy;
dsc_type = user_ool_dsc->type;
user_dsc = (typeof(user_dsc))(user_ool_dsc+1);
} else {
mach_msg_ool_descriptor32_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
addr = CAST_USER_ADDR_T(user_ool_dsc->address);
dealloc = user_ool_dsc->deallocate;
copy_options = user_ool_dsc->copy;
dsc_type = user_ool_dsc->type;
length = user_ool_dsc->size;
user_dsc = (typeof(user_dsc))(user_ool_dsc+1);
}
dsc->size = (mach_msg_size_t)length;
dsc->deallocate = dealloc;
dsc->copy = copy_options;
dsc->type = dsc_type;
if (length == 0) {
dsc->address = NULL;
} else if ((length >= MSG_OOL_SIZE_SMALL) &&
(copy_options == MACH_MSG_PHYSICAL_COPY) && !dealloc) {
if (copyin(addr, (char *)*paddr, length)) {
*mr = MACH_SEND_INVALID_MEMORY;
return NULL;
}
if (!page_aligned(length)) {
(void) memset((void *) (*paddr + length), 0,
round_page(length) - length);
}
if (vm_map_copyin(ipc_kernel_copy_map, (vm_map_address_t)*paddr,
(vm_map_size_t)length, TRUE, copy) != KERN_SUCCESS) {
*mr = MACH_MSG_VM_KERNEL;
return NULL;
}
dsc->address = (void *)*copy;
*paddr += round_page(length);
*space_needed -= round_page(length);
} else {
kern_return_t kr = vm_map_copyin(map, addr,
(vm_map_size_t)length, dealloc, copy);
if (kr != KERN_SUCCESS) {
*mr = (kr == KERN_RESOURCE_SHORTAGE) ?
MACH_MSG_VM_KERNEL :
MACH_SEND_INVALID_MEMORY;
return NULL;
}
dsc->address = (void *)*copy;
}
return user_dsc;
}
mach_msg_descriptor_t * ipc_kmsg_copyin_ool_ports_descriptor(
mach_msg_ool_ports_descriptor_t *dsc,
mach_msg_descriptor_t *user_dsc,
int is_64bit,
vm_map_t map,
ipc_space_t space,
ipc_object_t dest,
ipc_kmsg_t kmsg,
mach_msg_return_t *mr);
mach_msg_descriptor_t *
ipc_kmsg_copyin_ool_ports_descriptor(
mach_msg_ool_ports_descriptor_t *dsc,
mach_msg_descriptor_t *user_dsc,
int is_64bit,
vm_map_t map,
ipc_space_t space,
ipc_object_t dest,
ipc_kmsg_t kmsg,
mach_msg_return_t *mr)
{
void *data;
ipc_object_t *objects;
unsigned int i;
mach_vm_offset_t addr;
mach_msg_type_name_t user_disp;
mach_msg_type_name_t result_disp;
mach_msg_type_number_t count;
mach_msg_copy_options_t copy_option;
boolean_t deallocate;
mach_msg_descriptor_type_t type;
vm_size_t ports_length, names_length;
if (is_64bit) {
mach_msg_ool_ports_descriptor64_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
addr = (mach_vm_offset_t)user_ool_dsc->address;
count = user_ool_dsc->count;
deallocate = user_ool_dsc->deallocate;
copy_option = user_ool_dsc->copy;
user_disp = user_ool_dsc->disposition;
type = user_ool_dsc->type;
user_dsc = (typeof(user_dsc))(user_ool_dsc+1);
} else {
mach_msg_ool_ports_descriptor32_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
addr = CAST_USER_ADDR_T(user_ool_dsc->address);
count = user_ool_dsc->count;
deallocate = user_ool_dsc->deallocate;
copy_option = user_ool_dsc->copy;
user_disp = user_ool_dsc->disposition;
type = user_ool_dsc->type;
user_dsc = (typeof(user_dsc))(user_ool_dsc+1);
}
dsc->deallocate = deallocate;
dsc->copy = copy_option;
dsc->type = type;
dsc->count = count;
dsc->address = NULL;
result_disp = ipc_object_copyin_type(user_disp);
dsc->disposition = result_disp;
if (copy_option != MACH_MSG_PHYSICAL_COPY &&
copy_option != MACH_MSG_VIRTUAL_COPY) {
*mr = MACH_SEND_INVALID_TYPE;
return NULL;
}
if (os_mul_overflow(count, sizeof(mach_port_t), &ports_length)) {
*mr = MACH_SEND_TOO_LARGE;
return NULL;
}
if (os_mul_overflow(count, sizeof(mach_port_name_t), &names_length)) {
*mr = MACH_SEND_TOO_LARGE;
return NULL;
}
if (ports_length == 0) {
return user_dsc;
}
data = kalloc(ports_length);
if (data == NULL) {
*mr = MACH_SEND_NO_BUFFER;
return NULL;
}
#ifdef __LP64__
mach_port_name_t *names = &((mach_port_name_t *)data)[count];
#else
mach_port_name_t *names = ((mach_port_name_t *)data);
#endif
if (copyinmap(map, addr, names, names_length) != KERN_SUCCESS) {
kfree(data, ports_length);
*mr = MACH_SEND_INVALID_MEMORY;
return NULL;
}
if (deallocate) {
(void) mach_vm_deallocate(map, addr, (mach_vm_size_t)ports_length);
}
objects = (ipc_object_t *) data;
dsc->address = data;
for ( i = 0; i < count; i++) {
mach_port_name_t name = names[i];
ipc_object_t object;
if (!MACH_PORT_VALID(name)) {
objects[i] = (ipc_object_t)CAST_MACH_NAME_TO_PORT(name);
continue;
}
kern_return_t kr = ipc_object_copyin(space, name, user_disp, &object);
if (kr != KERN_SUCCESS) {
unsigned int j;
for(j = 0; j < i; j++) {
object = objects[j];
if (IPC_OBJECT_VALID(object))
ipc_object_destroy(object, result_disp);
}
kfree(data, ports_length);
dsc->address = NULL;
*mr = MACH_SEND_INVALID_RIGHT;
return NULL;
}
if ((dsc->disposition == MACH_MSG_TYPE_PORT_RECEIVE) &&
ipc_port_check_circularity(
(ipc_port_t) object,
(ipc_port_t) dest))
kmsg->ikm_header->msgh_bits |= MACH_MSGH_BITS_CIRCULAR;
objects[i] = object;
}
return user_dsc;
}
mach_msg_return_t
ipc_kmsg_copyin_body(
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map)
{
ipc_object_t dest;
mach_msg_body_t *body;
mach_msg_descriptor_t *daddr, *naddr;
mach_msg_descriptor_t *user_addr, *kern_addr;
mach_msg_type_number_t dsc_count;
boolean_t is_task_64bit = (map->max_offset > VM_MAX_ADDRESS);
boolean_t complex = FALSE;
vm_size_t space_needed = 0;
vm_offset_t paddr = 0;
vm_map_copy_t copy = VM_MAP_COPY_NULL;
mach_msg_type_number_t i;
mach_msg_return_t mr = MACH_MSG_SUCCESS;
vm_size_t descriptor_size = 0;
mach_msg_type_number_t total_ool_port_count = 0;
dest = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
naddr = (mach_msg_descriptor_t *) (body + 1);
dsc_count = body->msgh_descriptor_count;
if (dsc_count == 0)
return MACH_MSG_SUCCESS;
daddr = NULL;
for (i = 0; i < dsc_count; i++) {
mach_msg_size_t size;
mach_msg_type_number_t ool_port_count = 0;
daddr = naddr;
if (is_task_64bit) {
switch (daddr->type.type) {
case MACH_MSG_OOL_DESCRIPTOR:
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_PORTS_DESCRIPTOR:
descriptor_size += 16;
naddr = (typeof(naddr))((vm_offset_t)daddr + 16);
break;
default:
descriptor_size += 12;
naddr = (typeof(naddr))((vm_offset_t)daddr + 12);
break;
}
} else {
descriptor_size += 12;
naddr = (typeof(naddr))((vm_offset_t)daddr + 12);
}
if (naddr > (mach_msg_descriptor_t *)
((vm_offset_t)kmsg->ikm_header + kmsg->ikm_header->msgh_size)) {
mr = MACH_SEND_MSG_TOO_SMALL;
goto clean_message;
}
switch (daddr->type.type) {
case MACH_MSG_OOL_DESCRIPTOR:
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
size = (is_task_64bit) ?
((mach_msg_ool_descriptor64_t *)daddr)->size :
daddr->out_of_line.size;
if (daddr->out_of_line.copy != MACH_MSG_PHYSICAL_COPY &&
daddr->out_of_line.copy != MACH_MSG_VIRTUAL_COPY) {
mr = MACH_SEND_INVALID_TYPE;
goto clean_message;
}
if ((size >= MSG_OOL_SIZE_SMALL) &&
(daddr->out_of_line.copy == MACH_MSG_PHYSICAL_COPY) &&
!(daddr->out_of_line.deallocate)) {
if (space_needed + round_page(size) <= space_needed) {
mr = MACH_MSG_VM_KERNEL;
goto clean_message;
}
space_needed += round_page(size);
if (space_needed > ipc_kmsg_max_vm_space) {
mr = MACH_MSG_VM_KERNEL;
goto clean_message;
}
}
break;
case MACH_MSG_PORT_DESCRIPTOR:
if (os_add_overflow(total_ool_port_count, 1, &total_ool_port_count)) {
mr = MACH_SEND_TOO_LARGE;
goto clean_message;
}
break;
case MACH_MSG_OOL_PORTS_DESCRIPTOR:
ool_port_count = (is_task_64bit) ?
((mach_msg_ool_ports_descriptor64_t *)daddr)->count :
daddr->ool_ports.count;
if (os_add_overflow(total_ool_port_count, ool_port_count, &total_ool_port_count)) {
mr = MACH_SEND_TOO_LARGE;
goto clean_message;
}
if (ool_port_count > (ipc_kmsg_max_vm_space/sizeof(mach_port_t))) {
mr = MACH_SEND_TOO_LARGE;
goto clean_message;
}
break;
}
}
if (total_ool_port_count >= (MACH_PORT_UREFS_MAX / 4)) {
mr = MACH_SEND_TOO_LARGE;
goto clean_message;
}
if (space_needed) {
if (vm_allocate_kernel(ipc_kernel_copy_map, &paddr, space_needed,
VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_IPC) != KERN_SUCCESS) {
mr = MACH_MSG_VM_KERNEL;
goto clean_message;
}
}
user_addr = (mach_msg_descriptor_t *)((vm_offset_t)kmsg->ikm_header + sizeof(mach_msg_base_t));
if(descriptor_size != 16*dsc_count) {
vm_offset_t dsc_adjust = 16*dsc_count - descriptor_size;
memmove((char *)(((vm_offset_t)kmsg->ikm_header) - dsc_adjust), kmsg->ikm_header, sizeof(mach_msg_base_t));
kmsg->ikm_header = (mach_msg_header_t *)((vm_offset_t)kmsg->ikm_header - dsc_adjust);
kmsg->ikm_header->msgh_size += (mach_msg_size_t)dsc_adjust;
}
kern_addr = (mach_msg_descriptor_t *)((vm_offset_t)kmsg->ikm_header + sizeof(mach_msg_base_t));
for(i=0;i<dsc_count;i++) {
switch (user_addr->type.type) {
case MACH_MSG_PORT_DESCRIPTOR:
user_addr = ipc_kmsg_copyin_port_descriptor((mach_msg_port_descriptor_t *)kern_addr,
(mach_msg_legacy_port_descriptor_t *)user_addr, space, dest, kmsg, &mr);
kern_addr++;
complex = TRUE;
break;
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR:
user_addr = ipc_kmsg_copyin_ool_descriptor((mach_msg_ool_descriptor_t *)kern_addr,
user_addr, is_task_64bit, &paddr, ©, &space_needed, map, &mr);
kern_addr++;
complex = TRUE;
break;
case MACH_MSG_OOL_PORTS_DESCRIPTOR:
user_addr = ipc_kmsg_copyin_ool_ports_descriptor((mach_msg_ool_ports_descriptor_t *)kern_addr,
user_addr, is_task_64bit, map, space, dest, kmsg, &mr);
kern_addr++;
complex = TRUE;
break;
default:
mr = MACH_SEND_INVALID_TYPE;
break;
}
if (MACH_MSG_SUCCESS != mr) {
ipc_kmsg_clean_partial(kmsg, i,
(mach_msg_descriptor_t *)((mach_msg_base_t *)kmsg->ikm_header + 1),
paddr, space_needed);
goto out;
}
}
if (!complex) {
kmsg->ikm_header->msgh_bits &= ~MACH_MSGH_BITS_COMPLEX;
}
out:
return mr;
clean_message:
ipc_kmsg_clean_partial(kmsg, 0, NULL, 0, 0);
return mr;
}
mach_msg_return_t
ipc_kmsg_copyin(
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
mach_msg_priority_t override,
mach_msg_option_t *optionp)
{
mach_msg_return_t mr;
kmsg->ikm_header->msgh_bits &= MACH_MSGH_BITS_USER;
mr = ipc_kmsg_copyin_header(kmsg, space, override, optionp);
if (mr != MACH_MSG_SUCCESS)
return mr;
KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC,MACH_IPC_MSG_SEND) | DBG_FUNC_NONE,
VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
(uintptr_t)kmsg->ikm_header->msgh_bits,
(uintptr_t)kmsg->ikm_header->msgh_id,
VM_KERNEL_ADDRPERM((uintptr_t)unsafe_convert_port_to_voucher(kmsg->ikm_voucher)),
0);
DEBUG_KPRINT_SYSCALL_IPC("ipc_kmsg_copyin header:\n%.8x\n%.8x\n%p\n%p\n%p\n%.8x\n",
kmsg->ikm_header->msgh_size,
kmsg->ikm_header->msgh_bits,
kmsg->ikm_header->msgh_remote_port,
kmsg->ikm_header->msgh_local_port,
kmsg->ikm_voucher,
kmsg->ikm_header->msgh_id);
if ((kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_COMPLEX) == 0)
return MACH_MSG_SUCCESS;
mr = ipc_kmsg_copyin_body( kmsg, space, map);
__unreachable_ok_push
if (DEBUG_KPRINT_SYSCALL_PREDICATE(DEBUG_KPRINT_SYSCALL_IPC_MASK))
{
kprintf("body:\n");
uint32_t i;
for(i=0;i*4 < (kmsg->ikm_header->msgh_size - sizeof(mach_msg_header_t));i++)
{
kprintf("%.4x\n",((uint32_t *)(kmsg->ikm_header + 1))[i]);
}
}
__unreachable_ok_pop
return mr;
}
mach_msg_return_t
ipc_kmsg_copyin_from_kernel(
ipc_kmsg_t kmsg)
{
mach_msg_bits_t bits = kmsg->ikm_header->msgh_bits;
mach_msg_type_name_t rname = MACH_MSGH_BITS_REMOTE(bits);
mach_msg_type_name_t lname = MACH_MSGH_BITS_LOCAL(bits);
ipc_object_t remote = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
ipc_object_t local = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
if (!IO_VALID(remote))
return MACH_SEND_INVALID_DEST;
ipc_object_copyin_from_kernel(remote, rname);
if (IO_VALID(local))
ipc_object_copyin_from_kernel(local, lname);
if (bits == (MACH_MSGH_BITS_COMPLEX |
MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0))) {
bits = (MACH_MSGH_BITS_COMPLEX |
MACH_MSGH_BITS(MACH_MSG_TYPE_PORT_SEND, 0));
kmsg->ikm_header->msgh_bits = bits;
} else {
bits = (MACH_MSGH_BITS_OTHER(bits) |
MACH_MSGH_BITS(ipc_object_copyin_type(rname),
ipc_object_copyin_type(lname)));
kmsg->ikm_header->msgh_bits = bits;
if ((bits & MACH_MSGH_BITS_COMPLEX) == 0)
return MACH_MSG_SUCCESS;
}
{
mach_msg_descriptor_t *saddr;
mach_msg_body_t *body;
mach_msg_type_number_t i, count;
body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
saddr = (mach_msg_descriptor_t *) (body + 1);
count = body->msgh_descriptor_count;
for (i = 0; i < count; i++, saddr++) {
switch (saddr->type.type) {
case MACH_MSG_PORT_DESCRIPTOR: {
mach_msg_type_name_t name;
ipc_object_t object;
mach_msg_port_descriptor_t *dsc;
dsc = &saddr->port;
name = dsc->disposition;
object = (ipc_object_t) dsc->name;
dsc->disposition = ipc_object_copyin_type(name);
if (!IO_VALID(object)) {
break;
}
ipc_object_copyin_from_kernel(object, name);
if (((ipc_port_t)remote)->ip_receiver != ipc_space_kernel) {
if ((dsc->disposition == MACH_MSG_TYPE_PORT_RECEIVE) &&
ipc_port_check_circularity((ipc_port_t) object,
(ipc_port_t) remote)) {
kmsg->ikm_header->msgh_bits |=
MACH_MSGH_BITS_CIRCULAR;
}
}
break;
}
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR: {
break;
}
case MACH_MSG_OOL_PORTS_DESCRIPTOR: {
ipc_object_t *objects;
unsigned int j;
mach_msg_type_name_t name;
mach_msg_ool_ports_descriptor_t *dsc;
dsc = (mach_msg_ool_ports_descriptor_t *)&saddr->ool_ports;
name = dsc->disposition;
dsc->disposition = ipc_object_copyin_type(name);
objects = (ipc_object_t *) dsc->address;
for ( j = 0; j < dsc->count; j++) {
ipc_object_t object = objects[j];
if (!IO_VALID(object))
continue;
ipc_object_copyin_from_kernel(object, name);
if ((dsc->disposition == MACH_MSG_TYPE_PORT_RECEIVE) &&
ipc_port_check_circularity(
(ipc_port_t) object,
(ipc_port_t) remote))
kmsg->ikm_header->msgh_bits |= MACH_MSGH_BITS_CIRCULAR;
}
break;
}
default: {
#if MACH_ASSERT
panic("ipc_kmsg_copyin_from_kernel: bad descriptor");
#endif
}
}
}
}
return MACH_MSG_SUCCESS;
}
#if IKM_SUPPORT_LEGACY
mach_msg_return_t
ipc_kmsg_copyin_from_kernel_legacy(
ipc_kmsg_t kmsg)
{
mach_msg_bits_t bits = kmsg->ikm_header->msgh_bits;
mach_msg_type_name_t rname = MACH_MSGH_BITS_REMOTE(bits);
mach_msg_type_name_t lname = MACH_MSGH_BITS_LOCAL(bits);
ipc_object_t remote = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
ipc_object_t local = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
if (!IO_VALID(remote))
return MACH_SEND_INVALID_DEST;
ipc_object_copyin_from_kernel(remote, rname);
if (IO_VALID(local))
ipc_object_copyin_from_kernel(local, lname);
if (bits == (MACH_MSGH_BITS_COMPLEX |
MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0))) {
bits = (MACH_MSGH_BITS_COMPLEX |
MACH_MSGH_BITS(MACH_MSG_TYPE_PORT_SEND, 0));
kmsg->ikm_header->msgh_bits = bits;
} else {
bits = (MACH_MSGH_BITS_OTHER(bits) |
MACH_MSGH_BITS(ipc_object_copyin_type(rname),
ipc_object_copyin_type(lname)));
kmsg->ikm_header->msgh_bits = bits;
if ((bits & MACH_MSGH_BITS_COMPLEX) == 0)
return MACH_MSG_SUCCESS;
}
{
mach_msg_legacy_descriptor_t *saddr;
mach_msg_descriptor_t *daddr;
mach_msg_body_t *body;
mach_msg_type_number_t i, count;
body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
saddr = (typeof(saddr)) (body + 1);
count = body->msgh_descriptor_count;
if(count) {
vm_offset_t dsc_adjust = 4*count;
memmove((char *)(((vm_offset_t)kmsg->ikm_header) - dsc_adjust), kmsg->ikm_header, sizeof(mach_msg_base_t));
kmsg->ikm_header = (mach_msg_header_t *)((vm_offset_t)kmsg->ikm_header - dsc_adjust);
kmsg->ikm_header->msgh_size += dsc_adjust;
}
daddr = (mach_msg_descriptor_t *)((vm_offset_t)kmsg->ikm_header + sizeof(mach_msg_base_t));
for (i = 0; i < count; i++, saddr++, daddr++) {
switch (saddr->type.type) {
case MACH_MSG_PORT_DESCRIPTOR: {
mach_msg_type_name_t name;
ipc_object_t object;
mach_msg_legacy_port_descriptor_t *dsc;
mach_msg_port_descriptor_t *dest_dsc;
dsc = (typeof(dsc))&saddr->port;
dest_dsc = &daddr->port;
name = dsc->disposition;
object = (ipc_object_t) CAST_MACH_NAME_TO_PORT(dsc->name);
dest_dsc->disposition = ipc_object_copyin_type(name);
dest_dsc->name = (mach_port_t)object;
dest_dsc->type = MACH_MSG_PORT_DESCRIPTOR;
if (!IO_VALID(object)) {
break;
}
ipc_object_copyin_from_kernel(object, name);
if (((ipc_port_t)remote)->ip_receiver != ipc_space_kernel) {
if ((dest_dsc->disposition == MACH_MSG_TYPE_PORT_RECEIVE) &&
ipc_port_check_circularity((ipc_port_t) object,
(ipc_port_t) remote)) {
kmsg->ikm_header->msgh_bits |=
MACH_MSGH_BITS_CIRCULAR;
}
}
break;
}
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR: {
mach_msg_ool_descriptor32_t *source_dsc = &saddr->out_of_line32;
mach_msg_ool_descriptor_t *dest_dsc = (typeof(dest_dsc))&daddr->out_of_line;
vm_offset_t address = source_dsc->address;
vm_size_t size = source_dsc->size;
boolean_t deallocate = source_dsc->deallocate;
mach_msg_copy_options_t copy = source_dsc->copy;
mach_msg_descriptor_type_t type = source_dsc->type;
dest_dsc->address = (void *)address;
dest_dsc->size = size;
dest_dsc->deallocate = deallocate;
dest_dsc->copy = copy;
dest_dsc->type = type;
break;
}
case MACH_MSG_OOL_PORTS_DESCRIPTOR: {
ipc_object_t *objects;
unsigned int j;
mach_msg_type_name_t name;
mach_msg_ool_ports_descriptor_t *dest_dsc;
mach_msg_ool_ports_descriptor32_t *source_dsc = &saddr->ool_ports32;
dest_dsc = (typeof(dest_dsc))&daddr->ool_ports;
boolean_t deallocate = source_dsc->deallocate;
mach_msg_copy_options_t copy = source_dsc->copy;
mach_msg_size_t port_count = source_dsc->count;
mach_msg_type_name_t disposition = source_dsc->disposition;
name = disposition;
disposition = ipc_object_copyin_type(name);
objects = (ipc_object_t *) (uintptr_t)source_dsc->address;
for ( j = 0; j < port_count; j++) {
ipc_object_t object = objects[j];
if (!IO_VALID(object))
continue;
ipc_object_copyin_from_kernel(object, name);
if ((disposition == MACH_MSG_TYPE_PORT_RECEIVE) &&
ipc_port_check_circularity(
(ipc_port_t) object,
(ipc_port_t) remote))
kmsg->ikm_header->msgh_bits |= MACH_MSGH_BITS_CIRCULAR;
}
dest_dsc->address = objects;
dest_dsc->deallocate = deallocate;
dest_dsc->copy = copy;
dest_dsc->disposition = disposition;
dest_dsc->type = MACH_MSG_OOL_PORTS_DESCRIPTOR;
dest_dsc->count = port_count;
break;
}
default: {
#if MACH_ASSERT
panic("ipc_kmsg_copyin_from_kernel: bad descriptor");
#endif
}
}
}
}
return MACH_MSG_SUCCESS;
}
#endif
mach_msg_return_t
ipc_kmsg_copyout_header(
ipc_kmsg_t kmsg,
ipc_space_t space,
mach_msg_option_t option)
{
mach_msg_header_t *msg = kmsg->ikm_header;
mach_msg_bits_t mbits = msg->msgh_bits;
ipc_port_t dest = (ipc_port_t) msg->msgh_remote_port;
assert(IP_VALID(dest));
ipc_port_spnotify(dest);
{
mach_msg_type_name_t dest_type = MACH_MSGH_BITS_REMOTE(mbits);
mach_msg_type_name_t reply_type = MACH_MSGH_BITS_LOCAL(mbits);
mach_msg_type_name_t voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
ipc_port_t reply = msg->msgh_local_port;
ipc_port_t release_reply_port = IP_NULL;
mach_port_name_t dest_name, reply_name;
ipc_port_t voucher = kmsg->ikm_voucher;
ipc_port_t release_voucher_port = IP_NULL;
mach_port_name_t voucher_name;
uint32_t entries_held = 0;
boolean_t need_write_lock = FALSE;
kern_return_t kr;
if (IP_VALID(reply)) {
entries_held++;
need_write_lock = TRUE;
}
if (IP_VALID(voucher)) {
assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
if ((option & MACH_RCV_VOUCHER) != 0)
entries_held++;
need_write_lock = TRUE;
}
if (need_write_lock) {
is_write_lock(space);
while(entries_held) {
if (!is_active(space)) {
is_write_unlock(space);
return (MACH_RCV_HEADER_ERROR|
MACH_MSG_IPC_SPACE);
}
kr = ipc_entries_hold(space, entries_held);
if (KERN_SUCCESS == kr)
break;
kr = ipc_entry_grow_table(space, ITS_SIZE_NONE);
if (KERN_SUCCESS != kr)
return(MACH_RCV_HEADER_ERROR|
MACH_MSG_IPC_SPACE);
}
if (IP_VALID(reply)) {
ipc_entry_t entry;
if ((reply_type != MACH_MSG_TYPE_PORT_SEND_ONCE) &&
ipc_right_reverse(space, (ipc_object_t) reply, &reply_name, &entry)) {
assert(entry->ie_bits & MACH_PORT_TYPE_SEND_RECEIVE);
} else {
ip_lock(reply);
if (!ip_active(reply)) {
ip_unlock(reply);
release_reply_port = reply;
reply = IP_DEAD;
reply_name = MACH_PORT_DEAD;
goto done_with_reply;
}
assert(entries_held > 0);
entries_held--;
ipc_entry_claim(space, &reply_name, &entry);
assert(IE_BITS_TYPE(entry->ie_bits) == MACH_PORT_TYPE_NONE);
assert(entry->ie_object == IO_NULL);
entry->ie_object = (ipc_object_t) reply;
}
ip_reference(reply);
kr = ipc_right_copyout(space, reply_name, entry,
reply_type, TRUE, (ipc_object_t) reply);
assert(kr == KERN_SUCCESS);
} else
reply_name = CAST_MACH_PORT_TO_NAME(reply);
done_with_reply:
if (voucher_type != MACH_MSGH_BITS_ZERO) {
assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
if (!IP_VALID(voucher)) {
if ((option & MACH_RCV_VOUCHER) == 0) {
voucher_type = MACH_MSGH_BITS_ZERO;
}
voucher_name = MACH_PORT_NULL;
goto done_with_voucher;
}
kmsg->ikm_voucher = IP_NULL;
if ((option & MACH_RCV_VOUCHER) != 0) {
ipc_entry_t entry;
if (ipc_right_reverse(space, (ipc_object_t) voucher,
&voucher_name, &entry)) {
assert(entry->ie_bits & MACH_PORT_TYPE_SEND);
} else {
assert(entries_held > 0);
entries_held--;
ipc_entry_claim(space, &voucher_name, &entry);
assert(IE_BITS_TYPE(entry->ie_bits) == MACH_PORT_TYPE_NONE);
assert(entry->ie_object == IO_NULL);
entry->ie_object = (ipc_object_t) voucher;
ip_lock(voucher);
}
assert(ip_active(voucher));
assert(ip_kotype(voucher) == IKOT_VOUCHER);
kr = ipc_right_copyout(space, voucher_name, entry,
MACH_MSG_TYPE_MOVE_SEND, TRUE,
(ipc_object_t) voucher);
} else {
voucher_type = MACH_MSGH_BITS_ZERO;
release_voucher_port = voucher;
voucher_name = MACH_PORT_NULL;
}
} else {
voucher_name = msg->msgh_voucher_port;
}
done_with_voucher:
ip_lock(dest);
is_write_unlock(space);
} else {
is_read_lock(space);
if (!is_active(space)) {
is_read_unlock(space);
return MACH_RCV_HEADER_ERROR|MACH_MSG_IPC_SPACE;
}
ip_lock(dest);
is_read_unlock(space);
reply_name = CAST_MACH_PORT_TO_NAME(reply);
if (voucher_type != MACH_MSGH_BITS_ZERO) {
assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
if ((option & MACH_RCV_VOUCHER) == 0) {
voucher_type = MACH_MSGH_BITS_ZERO;
}
voucher_name = MACH_PORT_NULL;
} else {
voucher_name = msg->msgh_voucher_port;
}
}
if (ip_active(dest)) {
ipc_object_copyout_dest(space, (ipc_object_t) dest,
dest_type, &dest_name);
} else {
ipc_port_timestamp_t timestamp;
timestamp = dest->ip_timestamp;
ip_unlock(dest);
ip_release(dest);
if (IP_VALID(reply)) {
ip_lock(reply);
if (ip_active(reply) ||
IP_TIMESTAMP_ORDER(timestamp,
reply->ip_timestamp))
dest_name = MACH_PORT_DEAD;
else
dest_name = MACH_PORT_NULL;
ip_unlock(reply);
} else
dest_name = MACH_PORT_DEAD;
}
if (IP_VALID(reply))
ip_release(reply);
if (IP_VALID(release_reply_port)) {
if (reply_type == MACH_MSG_TYPE_PORT_SEND_ONCE)
ipc_port_release_sonce(release_reply_port);
else
ipc_port_release_send(release_reply_port);
}
if (IP_VALID(release_voucher_port))
ipc_port_release_send(release_voucher_port);
if ((option & MACH_RCV_VOUCHER) != 0) {
KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC, MACH_IPC_MSG_RECV) | DBG_FUNC_NONE,
VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
(uintptr_t)kmsg->ikm_header->msgh_bits,
(uintptr_t)kmsg->ikm_header->msgh_id,
VM_KERNEL_ADDRPERM((uintptr_t)unsafe_convert_port_to_voucher(voucher)),
0);
} else {
KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_IPC, MACH_IPC_MSG_RECV_VOUCHER_REFUSED) | DBG_FUNC_NONE,
VM_KERNEL_ADDRPERM((uintptr_t)kmsg),
(uintptr_t)kmsg->ikm_header->msgh_bits,
(uintptr_t)kmsg->ikm_header->msgh_id,
VM_KERNEL_ADDRPERM((uintptr_t)unsafe_convert_port_to_voucher(voucher)),
0);
}
msg->msgh_bits = MACH_MSGH_BITS_SET(reply_type, dest_type,
voucher_type, mbits);
msg->msgh_local_port = CAST_MACH_NAME_TO_PORT(dest_name);
msg->msgh_remote_port = CAST_MACH_NAME_TO_PORT(reply_name);
msg->msgh_voucher_port = voucher_name;
}
return MACH_MSG_SUCCESS;
}
mach_msg_return_t
ipc_kmsg_copyout_object(
ipc_space_t space,
ipc_object_t object,
mach_msg_type_name_t msgt_name,
mach_port_name_t *namep)
{
kern_return_t kr;
if (!IO_VALID(object)) {
*namep = CAST_MACH_PORT_TO_NAME(object);
return MACH_MSG_SUCCESS;
}
kr = ipc_object_copyout(space, object, msgt_name, TRUE, namep);
if (kr != KERN_SUCCESS) {
ipc_object_destroy(object, msgt_name);
if (kr == KERN_INVALID_CAPABILITY)
*namep = MACH_PORT_DEAD;
else {
*namep = MACH_PORT_NULL;
if (kr == KERN_RESOURCE_SHORTAGE)
return MACH_MSG_IPC_KERNEL;
else
return MACH_MSG_IPC_SPACE;
}
}
return MACH_MSG_SUCCESS;
}
mach_msg_descriptor_t *
ipc_kmsg_copyout_port_descriptor(mach_msg_descriptor_t *dsc,
mach_msg_descriptor_t *user_dsc,
ipc_space_t space,
kern_return_t *mr);
mach_msg_descriptor_t *
ipc_kmsg_copyout_port_descriptor(mach_msg_descriptor_t *dsc,
mach_msg_descriptor_t *dest_dsc,
ipc_space_t space,
kern_return_t *mr)
{
mach_port_t port;
mach_port_name_t name;
mach_msg_type_name_t disp;
port = dsc->port.name;
disp = dsc->port.disposition;
*mr |= ipc_kmsg_copyout_object(space,
(ipc_object_t)port,
disp,
&name);
if(current_task() == kernel_task)
{
mach_msg_port_descriptor_t *user_dsc = (typeof(user_dsc))dest_dsc;
user_dsc--; bzero((void *)user_dsc, sizeof(*user_dsc));
user_dsc->name = CAST_MACH_NAME_TO_PORT(name);
user_dsc->disposition = disp;
user_dsc->type = MACH_MSG_PORT_DESCRIPTOR;
dest_dsc = (typeof(dest_dsc))user_dsc;
} else {
mach_msg_legacy_port_descriptor_t *user_dsc = (typeof(user_dsc))dest_dsc;
user_dsc--; bzero((void *)user_dsc, sizeof(*user_dsc));
user_dsc->name = CAST_MACH_PORT_TO_NAME(name);
user_dsc->disposition = disp;
user_dsc->type = MACH_MSG_PORT_DESCRIPTOR;
dest_dsc = (typeof(dest_dsc))user_dsc;
}
return (mach_msg_descriptor_t *)dest_dsc;
}
mach_msg_descriptor_t *
ipc_kmsg_copyout_ool_descriptor(mach_msg_ool_descriptor_t *dsc, mach_msg_descriptor_t *user_dsc, int is_64bit, vm_map_t map, mach_msg_return_t *mr);
mach_msg_descriptor_t *
ipc_kmsg_copyout_ool_descriptor(mach_msg_ool_descriptor_t *dsc, mach_msg_descriptor_t *user_dsc, int is_64bit, vm_map_t map, mach_msg_return_t *mr)
{
vm_map_copy_t copy;
vm_map_address_t rcv_addr;
mach_msg_copy_options_t copy_options;
vm_map_size_t size;
mach_msg_descriptor_type_t dsc_type;
copy = (vm_map_copy_t)dsc->address;
size = (vm_map_size_t)dsc->size;
copy_options = dsc->copy;
assert(copy_options != MACH_MSG_KALLOC_COPY_T);
dsc_type = dsc->type;
if (copy != VM_MAP_COPY_NULL) {
kern_return_t kr;
rcv_addr = 0;
if (vm_map_copy_validate_size(map, copy, &size) == FALSE)
panic("Inconsistent OOL/copyout size on %p: expected %d, got %lld @%p",
dsc, dsc->size, (unsigned long long)copy->size, copy);
kr = vm_map_copyout_size(map, &rcv_addr, copy, size);
if (kr != KERN_SUCCESS) {
if (kr == KERN_RESOURCE_SHORTAGE)
*mr |= MACH_MSG_VM_KERNEL;
else
*mr |= MACH_MSG_VM_SPACE;
vm_map_copy_discard(copy);
rcv_addr = 0;
size = 0;
}
} else {
rcv_addr = 0;
size = 0;
}
if(current_task() == kernel_task)
{
mach_msg_ool_descriptor_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = (void *)(uintptr_t)rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->type = dsc_type;
user_ool_dsc->size = (mach_msg_size_t)size;
user_dsc = (typeof(user_dsc))user_ool_dsc;
} else if (is_64bit) {
mach_msg_ool_descriptor64_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->type = dsc_type;
user_ool_dsc->size = (mach_msg_size_t)size;
user_dsc = (typeof(user_dsc))user_ool_dsc;
} else {
mach_msg_ool_descriptor32_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = CAST_DOWN_EXPLICIT(uint32_t, rcv_addr);
user_ool_dsc->size = (mach_msg_size_t)size;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->type = dsc_type;
user_dsc = (typeof(user_dsc))user_ool_dsc;
}
return user_dsc;
}
mach_msg_descriptor_t *
ipc_kmsg_copyout_ool_ports_descriptor(mach_msg_ool_ports_descriptor_t *dsc,
mach_msg_descriptor_t *user_dsc,
int is_64bit,
vm_map_t map,
ipc_space_t space,
ipc_kmsg_t kmsg,
mach_msg_return_t *mr);
mach_msg_descriptor_t *
ipc_kmsg_copyout_ool_ports_descriptor(mach_msg_ool_ports_descriptor_t *dsc,
mach_msg_descriptor_t *user_dsc,
int is_64bit,
vm_map_t map,
ipc_space_t space,
ipc_kmsg_t kmsg,
mach_msg_return_t *mr)
{
mach_vm_offset_t rcv_addr = 0;
mach_msg_type_name_t disp;
mach_msg_type_number_t count, i;
vm_size_t ports_length, names_length;
mach_msg_copy_options_t copy_options = MACH_MSG_VIRTUAL_COPY;
count = dsc->count;
disp = dsc->disposition;
ports_length = count * sizeof(mach_port_t);
names_length = count * sizeof(mach_port_name_t);
if (ports_length != 0 && dsc->address != 0) {
#if 0
if (saddr != MACH_MSG_DESCRIPTOR_NULL) {
if (differs) {
OTHER_OOL_DESCRIPTOR *scatter_dsc;
scatter_dsc = (OTHER_OOL_DESCRIPTOR *)saddr;
rcv_addr = (mach_vm_offset_t) scatter_dsc->address;
copy_options = scatter_dsc->copy;
} else {
mach_msg_ool_descriptor_t *scatter_dsc;
scatter_dsc = &saddr->out_of_line;
rcv_addr = CAST_USER_ADDR_T(scatter_dsc->address);
copy_options = scatter_dsc->copy;
}
INCREMENT_SCATTER(saddr, sdsc_count, differs);
}
#endif
if (copy_options == MACH_MSG_VIRTUAL_COPY) {
vm_tag_t tag;
if (vm_kernel_map_is_kernel(map)) tag = VM_KERN_MEMORY_IPC;
else tag = VM_MEMORY_MACH_MSG;
kern_return_t kr;
if ((kr = mach_vm_allocate_kernel(map, &rcv_addr,
(mach_vm_size_t)names_length,
VM_FLAGS_ANYWHERE, tag)) != KERN_SUCCESS) {
ipc_kmsg_clean_body(kmsg, 1, (mach_msg_descriptor_t *)dsc);
rcv_addr = 0;
if (kr == KERN_RESOURCE_SHORTAGE){
*mr |= MACH_MSG_VM_KERNEL;
} else {
*mr |= MACH_MSG_VM_SPACE;
}
}
}
if (rcv_addr != 0) {
mach_port_t *objects = (mach_port_t *) dsc->address;
mach_port_name_t *names = (mach_port_name_t *) dsc->address;
for ( i = 0; i < count ; i++) {
ipc_object_t object = (ipc_object_t)objects[i];
*mr |= ipc_kmsg_copyout_object(space, object,
disp, &names[i]);
}
void *data = dsc->address;
if (copyoutmap(map, data, rcv_addr, names_length) != KERN_SUCCESS)
*mr |= MACH_MSG_VM_SPACE;
kfree(data, ports_length);
}
} else {
rcv_addr = 0;
}
if(current_task() == kernel_task) {
mach_msg_ool_ports_descriptor_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = (void *)(uintptr_t)rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->disposition = disp;
user_ool_dsc->type = MACH_MSG_OOL_PORTS_DESCRIPTOR;
user_ool_dsc->count = count;
user_dsc = (typeof(user_dsc))user_ool_dsc;
} if (is_64bit) {
mach_msg_ool_ports_descriptor64_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = rcv_addr;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->disposition = disp;
user_ool_dsc->type = MACH_MSG_OOL_PORTS_DESCRIPTOR;
user_ool_dsc->count = count;
user_dsc = (typeof(user_dsc))user_ool_dsc;
} else {
mach_msg_ool_ports_descriptor32_t *user_ool_dsc = (typeof(user_ool_dsc))user_dsc;
user_ool_dsc--;
bzero((void *)user_ool_dsc, sizeof(*user_ool_dsc));
user_ool_dsc->address = CAST_DOWN_EXPLICIT(uint32_t, rcv_addr);
user_ool_dsc->count = count;
user_ool_dsc->deallocate = (copy_options == MACH_MSG_VIRTUAL_COPY) ?
TRUE : FALSE;
user_ool_dsc->copy = copy_options;
user_ool_dsc->disposition = disp;
user_ool_dsc->type = MACH_MSG_OOL_PORTS_DESCRIPTOR;
user_dsc = (typeof(user_dsc))user_ool_dsc;
}
return user_dsc;
}
mach_msg_return_t
ipc_kmsg_copyout_body(
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
mach_msg_body_t *slist)
{
mach_msg_body_t *body;
mach_msg_descriptor_t *kern_dsc, *user_dsc;
mach_msg_descriptor_t *saddr;
mach_msg_type_number_t dsc_count, sdsc_count;
int i;
mach_msg_return_t mr = MACH_MSG_SUCCESS;
boolean_t is_task_64bit = (map->max_offset > VM_MAX_ADDRESS);
body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
dsc_count = body->msgh_descriptor_count;
kern_dsc = (mach_msg_descriptor_t *) (body + 1);
user_dsc = &kern_dsc[dsc_count];
if (slist != MACH_MSG_BODY_NULL) {
panic("Scatter lists disabled");
saddr = (mach_msg_descriptor_t *) (slist + 1);
sdsc_count = slist->msgh_descriptor_count;
}
else {
saddr = MACH_MSG_DESCRIPTOR_NULL;
sdsc_count = 0;
}
for (i = dsc_count-1; i >= 0; i--) {
switch (kern_dsc[i].type.type) {
case MACH_MSG_PORT_DESCRIPTOR:
user_dsc = ipc_kmsg_copyout_port_descriptor(&kern_dsc[i], user_dsc, space, &mr);
break;
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR :
user_dsc = ipc_kmsg_copyout_ool_descriptor(
(mach_msg_ool_descriptor_t *)&kern_dsc[i], user_dsc, is_task_64bit, map, &mr);
break;
case MACH_MSG_OOL_PORTS_DESCRIPTOR :
user_dsc = ipc_kmsg_copyout_ool_ports_descriptor(
(mach_msg_ool_ports_descriptor_t *)&kern_dsc[i], user_dsc, is_task_64bit, map, space, kmsg, &mr);
break;
default : {
panic("untyped IPC copyout body: invalid message descriptor");
}
}
}
if(user_dsc != kern_dsc) {
vm_offset_t dsc_adjust = (vm_offset_t)user_dsc - (vm_offset_t)kern_dsc;
memmove((char *)((vm_offset_t)kmsg->ikm_header + dsc_adjust), kmsg->ikm_header, sizeof(mach_msg_base_t));
kmsg->ikm_header = (mach_msg_header_t *)((vm_offset_t)kmsg->ikm_header + dsc_adjust);
kmsg->ikm_header->msgh_size -= (mach_msg_size_t)dsc_adjust;
}
return mr;
}
mach_msg_size_t
ipc_kmsg_copyout_size(
ipc_kmsg_t kmsg,
vm_map_t map)
{
mach_msg_size_t send_size;
send_size = kmsg->ikm_header->msgh_size;
boolean_t is_task_64bit = (map->max_offset > VM_MAX_ADDRESS);
#if defined(__LP64__)
send_size -= LEGACY_HEADER_SIZE_DELTA;
#endif
if (kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_COMPLEX) {
mach_msg_body_t *body;
mach_msg_descriptor_t *saddr, *eaddr;
body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
saddr = (mach_msg_descriptor_t *) (body + 1);
eaddr = saddr + body->msgh_descriptor_count;
for ( ; saddr < eaddr; saddr++ ) {
switch (saddr->type.type) {
case MACH_MSG_OOL_DESCRIPTOR:
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_PORTS_DESCRIPTOR:
if(!is_task_64bit)
send_size -= DESC_SIZE_ADJUSTMENT;
break;
case MACH_MSG_PORT_DESCRIPTOR:
send_size -= DESC_SIZE_ADJUSTMENT;
break;
default:
break;
}
}
}
return send_size;
}
mach_msg_return_t
ipc_kmsg_copyout(
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
mach_msg_body_t *slist,
mach_msg_option_t option)
{
mach_msg_return_t mr;
mr = ipc_kmsg_copyout_header(kmsg, space, option);
if (mr != MACH_MSG_SUCCESS) {
return mr;
}
if (kmsg->ikm_header->msgh_bits & MACH_MSGH_BITS_COMPLEX) {
mr = ipc_kmsg_copyout_body(kmsg, space, map, slist);
if (mr != MACH_MSG_SUCCESS)
mr |= MACH_RCV_BODY_ERROR;
}
return mr;
}
mach_msg_return_t
ipc_kmsg_copyout_pseudo(
ipc_kmsg_t kmsg,
ipc_space_t space,
vm_map_t map,
mach_msg_body_t *slist)
{
mach_msg_bits_t mbits = kmsg->ikm_header->msgh_bits;
ipc_object_t dest = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
ipc_object_t reply = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
ipc_object_t voucher = (ipc_object_t) kmsg->ikm_voucher;
mach_msg_type_name_t dest_type = MACH_MSGH_BITS_REMOTE(mbits);
mach_msg_type_name_t reply_type = MACH_MSGH_BITS_LOCAL(mbits);
mach_msg_type_name_t voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
mach_port_name_t voucher_name = kmsg->ikm_header->msgh_voucher_port;
mach_port_name_t dest_name, reply_name;
mach_msg_return_t mr;
current_thread()->ith_knote = ITH_KNOTE_PSEUDO;
assert(IO_VALID(dest));
#if 0
ipc_importance_clean(kmsg);
#else
ipc_importance_assert_clean(kmsg);
#endif
mr = (ipc_kmsg_copyout_object(space, dest, dest_type, &dest_name) |
ipc_kmsg_copyout_object(space, reply, reply_type, &reply_name));
kmsg->ikm_header->msgh_bits = mbits & MACH_MSGH_BITS_USER;
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(dest_name);
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(reply_name);
if (IO_VALID(voucher)) {
assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
kmsg->ikm_voucher = IP_NULL;
mr |= ipc_kmsg_copyout_object(space, voucher, voucher_type, &voucher_name);
kmsg->ikm_header->msgh_voucher_port = voucher_name;
}
if (mbits & MACH_MSGH_BITS_COMPLEX) {
mr |= ipc_kmsg_copyout_body(kmsg, space, map, slist);
}
return mr;
}
void
ipc_kmsg_copyout_dest(
ipc_kmsg_t kmsg,
ipc_space_t space)
{
mach_msg_bits_t mbits;
ipc_object_t dest;
ipc_object_t reply;
ipc_object_t voucher;
mach_msg_type_name_t dest_type;
mach_msg_type_name_t reply_type;
mach_msg_type_name_t voucher_type;
mach_port_name_t dest_name, reply_name, voucher_name;
mbits = kmsg->ikm_header->msgh_bits;
dest = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
reply = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
voucher = (ipc_object_t) kmsg->ikm_voucher;
voucher_name = kmsg->ikm_header->msgh_voucher_port;
dest_type = MACH_MSGH_BITS_REMOTE(mbits);
reply_type = MACH_MSGH_BITS_LOCAL(mbits);
voucher_type = MACH_MSGH_BITS_VOUCHER(mbits);
assert(IO_VALID(dest));
ipc_importance_assert_clean(kmsg);
io_lock(dest);
if (io_active(dest)) {
ipc_object_copyout_dest(space, dest, dest_type, &dest_name);
} else {
io_unlock(dest);
io_release(dest);
dest_name = MACH_PORT_DEAD;
}
if (IO_VALID(reply)) {
ipc_object_destroy(reply, reply_type);
reply_name = MACH_PORT_NULL;
} else
reply_name = CAST_MACH_PORT_TO_NAME(reply);
if (IO_VALID(voucher)) {
assert(voucher_type == MACH_MSG_TYPE_MOVE_SEND);
kmsg->ikm_voucher = IP_NULL;
ipc_object_destroy((ipc_object_t)voucher, voucher_type);
voucher_name = MACH_PORT_NULL;
}
kmsg->ikm_header->msgh_bits = MACH_MSGH_BITS_SET(reply_type, dest_type,
voucher_type, mbits);
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(dest_name);
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(reply_name);
kmsg->ikm_header->msgh_voucher_port = voucher_name;
if (mbits & MACH_MSGH_BITS_COMPLEX) {
mach_msg_body_t *body;
body = (mach_msg_body_t *) (kmsg->ikm_header + 1);
ipc_kmsg_clean_body(kmsg, body->msgh_descriptor_count,
(mach_msg_descriptor_t *)(body + 1));
}
}
void
ipc_kmsg_copyout_to_kernel(
ipc_kmsg_t kmsg,
ipc_space_t space)
{
ipc_object_t dest;
ipc_object_t reply;
mach_msg_type_name_t dest_type;
mach_msg_type_name_t reply_type;
mach_port_name_t dest_name, reply_name;
dest = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
reply = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
dest_type = MACH_MSGH_BITS_REMOTE(kmsg->ikm_header->msgh_bits);
reply_type = MACH_MSGH_BITS_LOCAL(kmsg->ikm_header->msgh_bits);
assert(IO_VALID(dest));
io_lock(dest);
if (io_active(dest)) {
ipc_object_copyout_dest(space, dest, dest_type, &dest_name);
} else {
io_unlock(dest);
io_release(dest);
dest_name = MACH_PORT_DEAD;
}
reply_name = CAST_MACH_PORT_TO_NAME(reply);
kmsg->ikm_header->msgh_bits =
(MACH_MSGH_BITS_OTHER(kmsg->ikm_header->msgh_bits) |
MACH_MSGH_BITS(reply_type, dest_type));
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(dest_name);
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(reply_name);
}
#if IKM_SUPPORT_LEGACY
void
ipc_kmsg_copyout_to_kernel_legacy(
ipc_kmsg_t kmsg,
ipc_space_t space)
{
ipc_object_t dest;
ipc_object_t reply;
mach_msg_type_name_t dest_type;
mach_msg_type_name_t reply_type;
mach_port_name_t dest_name, reply_name;
dest = (ipc_object_t) kmsg->ikm_header->msgh_remote_port;
reply = (ipc_object_t) kmsg->ikm_header->msgh_local_port;
dest_type = MACH_MSGH_BITS_REMOTE(kmsg->ikm_header->msgh_bits);
reply_type = MACH_MSGH_BITS_LOCAL(kmsg->ikm_header->msgh_bits);
assert(IO_VALID(dest));
io_lock(dest);
if (io_active(dest)) {
ipc_object_copyout_dest(space, dest, dest_type, &dest_name);
} else {
io_unlock(dest);
io_release(dest);
dest_name = MACH_PORT_DEAD;
}
reply_name = CAST_MACH_PORT_TO_NAME(reply);
kmsg->ikm_header->msgh_bits =
(MACH_MSGH_BITS_OTHER(kmsg->ikm_header->msgh_bits) |
MACH_MSGH_BITS(reply_type, dest_type));
kmsg->ikm_header->msgh_local_port = CAST_MACH_NAME_TO_PORT(dest_name);
kmsg->ikm_header->msgh_remote_port = CAST_MACH_NAME_TO_PORT(reply_name);
mach_msg_descriptor_t *saddr;
mach_msg_legacy_descriptor_t *daddr;
mach_msg_type_number_t i, count = ((mach_msg_base_t *)kmsg->ikm_header)->body.msgh_descriptor_count;
saddr = (mach_msg_descriptor_t *) (((mach_msg_base_t *)kmsg->ikm_header) + 1);
saddr = &saddr[count-1];
daddr = (mach_msg_legacy_descriptor_t *)&saddr[count];
daddr--;
vm_offset_t dsc_adjust = 0;
for (i = 0; i < count; i++, saddr--, daddr--) {
switch (saddr->type.type) {
case MACH_MSG_PORT_DESCRIPTOR: {
mach_msg_port_descriptor_t *dsc = &saddr->port;
mach_msg_legacy_port_descriptor_t *dest_dsc = &daddr->port;
mach_port_t name = dsc->name;
mach_msg_type_name_t disposition = dsc->disposition;
dest_dsc->name = CAST_MACH_PORT_TO_NAME(name);
dest_dsc->disposition = disposition;
dest_dsc->type = MACH_MSG_PORT_DESCRIPTOR;
break;
}
case MACH_MSG_OOL_VOLATILE_DESCRIPTOR:
case MACH_MSG_OOL_DESCRIPTOR: {
mach_msg_ool_descriptor_t *source_dsc = (typeof(source_dsc))&saddr->out_of_line;
mach_msg_ool_descriptor32_t *dest_dsc = &daddr->out_of_line32;
vm_offset_t address = (vm_offset_t)source_dsc->address;
vm_size_t size = source_dsc->size;
boolean_t deallocate = source_dsc->deallocate;
mach_msg_copy_options_t copy = source_dsc->copy;
mach_msg_descriptor_type_t type = source_dsc->type;
dest_dsc->address = address;
dest_dsc->size = size;
dest_dsc->deallocate = deallocate;
dest_dsc->copy = copy;
dest_dsc->type = type;
break;
}
case MACH_MSG_OOL_PORTS_DESCRIPTOR: {
mach_msg_ool_ports_descriptor_t *source_dsc = (typeof(source_dsc))&saddr->ool_ports;
mach_msg_ool_ports_descriptor32_t *dest_dsc = &daddr->ool_ports32;
vm_offset_t address = (vm_offset_t)source_dsc->address;
vm_size_t port_count = source_dsc->count;
boolean_t deallocate = source_dsc->deallocate;
mach_msg_copy_options_t copy = source_dsc->copy;
mach_msg_descriptor_type_t type = source_dsc->type;
dest_dsc->address = address;
dest_dsc->count = port_count;
dest_dsc->deallocate = deallocate;
dest_dsc->copy = copy;
dest_dsc->type = type;
break;
}
default: {
#if MACH_ASSERT
panic("ipc_kmsg_copyin_from_kernel: bad descriptor");
#endif
}
}
}
if(count) {
dsc_adjust = 4*count;
memmove((char *)((vm_offset_t)kmsg->ikm_header + dsc_adjust), kmsg->ikm_header, sizeof(mach_msg_base_t));
kmsg->ikm_header = (mach_msg_header_t *)((vm_offset_t)kmsg->ikm_header + dsc_adjust);
kmsg->ikm_header->msgh_size -= dsc_adjust;
}
}
#endif
#ifdef __arm64__
static void
ipc_kmsg_munge_trailer(mach_msg_max_trailer_t *in, void *_out, boolean_t is64bit)
{
if (is64bit) {
mach_msg_max_trailer64_t *out = (mach_msg_max_trailer64_t*)_out;
out->msgh_seqno = in->msgh_seqno;
out->msgh_context = in->msgh_context;
out->msgh_trailer_size = in->msgh_trailer_size;
out->msgh_ad = in->msgh_ad;
} else {
mach_msg_max_trailer32_t *out = (mach_msg_max_trailer32_t*)_out;
out->msgh_seqno = in->msgh_seqno;
out->msgh_context = (mach_port_context32_t)in->msgh_context;
out->msgh_trailer_size = in->msgh_trailer_size;
out->msgh_ad = in->msgh_ad;
}
}
#endif
mach_msg_trailer_size_t
ipc_kmsg_add_trailer(ipc_kmsg_t kmsg, ipc_space_t space __unused,
mach_msg_option_t option, thread_t thread,
mach_port_seqno_t seqno, boolean_t minimal_trailer,
mach_vm_offset_t context)
{
mach_msg_max_trailer_t *trailer;
#ifdef __arm64__
mach_msg_max_trailer_t tmp_trailer;
void *real_trailer_out = (void*)(mach_msg_max_trailer_t *)
((vm_offset_t)kmsg->ikm_header +
round_msg(kmsg->ikm_header->msgh_size));
bcopy(real_trailer_out, &tmp_trailer, MAX_TRAILER_SIZE);
trailer = &tmp_trailer;
#else
(void)thread;
trailer = (mach_msg_max_trailer_t *)
((vm_offset_t)kmsg->ikm_header +
round_msg(kmsg->ikm_header->msgh_size));
#endif
if (!(option & MACH_RCV_TRAILER_MASK)) {
return trailer->msgh_trailer_size;
}
trailer->msgh_seqno = seqno;
trailer->msgh_context = context;
trailer->msgh_trailer_size = REQUESTED_TRAILER_SIZE(thread_is_64bit(thread), option);
if (minimal_trailer) {
goto done;
}
if (MACH_RCV_TRAILER_ELEMENTS(option) >=
MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AV)){
trailer->msgh_ad = 0;
}
if (option & MACH_RCV_TRAILER_ELEMENTS (MACH_RCV_TRAILER_LABELS)) {
trailer->msgh_labels.sender = 0;
}
done:
#ifdef __arm64__
ipc_kmsg_munge_trailer(trailer, real_trailer_out, thread_is_64bit(thread));
#endif
return trailer->msgh_trailer_size;
}