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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This 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,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*
- * @OSF_COPYRIGHT@
- */
-
- /*
- * Mach RPC Subsystem Interfaces
- */
-
- #ifndef _MACH_RPC_H_
- #define _MACH_RPC_H_
-
- #include <mach/boolean.h>
- #include <mach/kern_return.h>
- #include <mach/port.h>
- #include <mach/vm_types.h>
-
- #include <mach/mig.h>
- #include <mach/mig_errors.h>
- #include <mach/machine/rpc.h>
- #include <mach/thread_status.h>
-
- #ifdef MACH_KERNEL_PRIVATE
- #include <ipc/ipc_object.h>
- #endif /* MACH_KERNEL_PRIVATE */
-
- /*
- * The various bits of the type field of the routine_arg_descriptor
- */
-
- /* The basic types */
-
- #define TYPE_SHIFT 0
- #define MACH_RPC_PORT (1 << TYPE_SHIFT)
- #define MACH_RPC_ARRAY (1 << (TYPE_SHIFT + 1))
- #define MACH_RPC_VARIABLE (1 << (TYPE_SHIFT + 2))
- #define LAST_TYPE_BIT (TYPE_SHIFT+3)
-
- /* XXX Port arrays need not be variable arrays, as assumed below. Fixme. */
- #define MACH_RPC_ARRAY_FIX (MACH_RPC_ARRAY)
- #define MACH_RPC_ARRAY_FIXED (MACH_RPC_ARRAY)
- #define MACH_RPC_ARRAY_VAR (MACH_RPC_ARRAY | MACH_RPC_VARIABLE)
- #define MACH_RPC_ARRAY_VARIABLE (MACH_RPC_ARRAY | MACH_RPC_VARIABLE)
- #define MACH_RPC_PORT_ARRAY (MACH_RPC_PORT | MACH_RPC_ARRAY_VAR)
-
- /* Argument direction bits */
-
- #define DIRECT_SHIFT LAST_TYPE_BIT
- #define DIRECTION_SHIFT LAST_TYPE_BIT
- #define MACH_RPC_IN (1 << DIRECTION_SHIFT)
- #define MACH_RPC_OUT (1 << (DIRECTION_SHIFT + 1))
- #define LAST_DIRECT_BIT (DIRECTION_SHIFT + 2)
- #define LAST_DIRECTION_BIT (DIRECTION_SHIFT + 2)
-
- #define MACH_RPC_INOUT (MACH_RPC_IN | MACH_RPC_OUT)
-
- /* Persist and pointer bit */
-
- #define POINTER_SHIFT LAST_DIRECTION_BIT
- #define MACH_RPC_POINTER (1 << POINTER_SHIFT)
- #define LAST_POINTER_BIT (POINTER_SHIFT + 1)
-
- /* Port disposition bits */
-
- #define NAME_SHIFT LAST_POINTER_BIT
- #define MACH_RPC_RECEIVE (1 << NAME_SHIFT)
- #define MACH_RPC_SEND (2 << NAME_SHIFT)
- #define MACH_RPC_SEND_ONCE (3 << NAME_SHIFT)
- #define LAST_NAME_BIT (NAME_SHIFT + 2)
-
- #define ACTION_SHIFT LAST_NAME_BIT
- #define MACH_RPC_MOVE (1 << ACTION_SHIFT)
- #define MACH_RPC_COPY (2 << ACTION_SHIFT)
- #define MACH_RPC_MAKE (3 << ACTION_SHIFT)
- #define LAST_ACTION_BIT (ACTION_SHIFT + 2)
-
- #define MACH_RPC_MOVE_RECEIVE (MACH_RPC_MOVE | MACH_RPC_RECEIVE)
- #define MACH_RPC_MOVE_SEND (MACH_RPC_MOVE | MACH_RPC_SEND)
- #define MACH_RPC_COPY_SEND (MACH_RPC_COPY | MACH_RPC_SEND)
- #define MACH_RPC_MAKE_SEND (MACH_RPC_MAKE | MACH_RPC_SEND)
- #define MACH_RPC_MOVE_SEND_ONCE (MACH_RPC_MOVE | MACH_RPC_SEND_ONCE)
- #define MACH_RPC_MAKE_SEND_ONCE (MACH_RPC_MAKE | MACH_RPC_SEND_ONCE)
-
- /* Hint for virtual vs. physical copy */
-
- #define OPTION_SHIFT LAST_ACTION_BIT
- #define MACH_RPC_PHYSICAL_COPY (1 << OPTION_SHIFT)
- #define MACH_RPC_VIRTUAL_COPY (1 << (OPTION_SHIFT + 1))
- #define LAST_OPTION_BIT (OPTION_SHIFT + 2)
-
- /* Deallocate? */
-
- #define DEALLOCATE_SHIFT LAST_OPTION_BIT
- #define MACH_RPC_DEALLOCATE (1 << DEALLOCATE_SHIFT)
- #define LAST_DEALLOCATE_BIT (DEALLOCATE_SHIFT + 1)
-
- /* Argument is already on the stack */
-
- #define ONSTACK_SHIFT LAST_DEALLOCATE_BIT
- #define MACH_RPC_ONSTACK (1 << ONSTACK_SHIFT)
- #define LAST_ONSTACK_BIT (ONSTACK_SHIFT + 1)
-
- /* Is variable array bounded? Derived from type and arg.size */
-
- #define BOUND_SHIFT LAST_ONSTACK_BIT
- #define MACH_RPC_BOUND (1 << BOUND_SHIFT)
- #define MACH_RPC_UNBOUND (0)
- #define BOUND MACH_RPC_BOUND
- #define UNBND MACH_RPC_UNBOUND
- #define LAST_BOUND_BIT (BOUND_SHIFT + 1)
-
- /*
- * Basic mach rpc types.
- */
- typedef unsigned int routine_arg_type;
- typedef unsigned int routine_arg_offset;
- typedef unsigned int routine_arg_size;
-
- /*
- * Definitions for a signature's argument and routine descriptor's.
- */
- struct routine_arg_descriptor {
- routine_arg_type type; /* Port, Array, etc. */
- routine_arg_size size; /* element size in bytes */
- routine_arg_size count; /* number of elements */
- routine_arg_offset offset; /* Offset in list of routine args */
- };
- typedef struct routine_arg_descriptor *routine_arg_descriptor_t;
-
- struct routine_descriptor {
- mig_impl_routine_t impl_routine; /* Server work func pointer */
- mig_stub_routine_t stub_routine; /* Unmarshalling func pointer */
- unsigned int argc; /* Number of argument words */
- unsigned int descr_count; /* Number of complex argument */
- /* descriptors */
- struct routine_arg_descriptor *
- arg_descr; /* Pointer to beginning of */
- /* the arg_descr array */
- unsigned int max_reply_msg; /* Max size for reply msg */
- };
- typedef struct routine_descriptor *routine_descriptor_t;
-
- #define DESCR_SIZE(x) ((x)->descr_count * sizeof(struct routine_arg_descriptor))
-
- struct rpc_signature {
- struct routine_descriptor rd;
- struct routine_arg_descriptor rad[1];
- };
-
- #ifdef MACH_KERNEL_PRIVATE
-
- typedef struct rpc_signature *rpc_signature_t;
-
- #endif
-
- #define RPC_SIGBUF_SIZE 8
- /*
- * A subsystem describes a set of server routines that can be invoked by
- * mach_rpc() on the ports that are registered with the subsystem. For
- * each routine, the routine number is given, along with the
- * address of the implementation function in the server and a
- * description of the arguments of the routine (it's "signature").
- *
- * This structure definition is only a template for what is really a
- * variable-length structure (generated by MIG for each subsystem).
- * The actual structures do not always have one entry in the routine
- * array, and also have a varying number of entries in the arg_descr
- * array. Each routine has an array of zero or more arg descriptors
- * one for each complex arg. These arrays are all catenated together
- * to form the arg_descr field of the subsystem struct. The
- * arg_descr field of each routine entry points to a unique sub-sequence
- * within this catenated array. The goal is to keep everything
- * contiguous.
- */
- struct rpc_subsystem {
- struct subsystem *subsystem; /* Reserved for system use */
-
- mach_msg_id_t start; /* Min routine number */
- mach_msg_id_t end; /* Max routine number + 1 */
- unsigned int maxsize; /* Max mach_msg size */
- vm_address_t base_addr; /* Address of this struct in user */
-
- struct routine_descriptor /* Array of routine descriptors */
- routine[1 /* Actually, (start-end+1) */
- ];
-
- struct routine_arg_descriptor
- arg_descriptor[1 /* Actually, the sum of the descr_ */
- ]; /* count fields for all routines */
- };
- typedef struct rpc_subsystem *rpc_subsystem_t;
-
- #define RPC_SUBSYSTEM_NULL ((rpc_subsystem_t) 0)
-
- /*
- * New RPC declarations
- *
- * First pass at definitions and types for the new rpc service.
- * This is subject to revision.
- */
-
- /*
- * RPC macros
- */
-
- #define RPC_MASK(shift,last) \
- ( ((1 << ((last)-(shift)))-1) << (shift) )
-
- #define RPC_FIELD(field,shift,last) \
- ( (field) & (((1 << ((last)-(shift)))-1) << (shift)) )
-
- #define RPC_BOUND(dsc) \
- (((RPC_FIELD((dsc).type,TYPE_SHIFT+1,TYPE_SHIFT+3) == \
- MACH_RPC_ARRAY_VARIABLE) && (dsc).count != 0) ? MACH_RPC_BOUND : 0)
-
- #define ROUNDUP2(x,n) ((((unsigned)(x)) + (n) - 1) & ~((n)-1))
- #define ROUNDWORD(x) ROUNDUP2(x,sizeof(int))
-
- /*
- * RPC errors
- *
- * Display and process errors of different severity, from just for
- * information only to fatal (panic). Error code colors indicate how
- * difficult it is for the subsystem to handle the error correctly.
- * The implication is that, for example, early versions of the code may
- * not be handling code red errors properly. The code should use this
- * facility instead of regular printf's.
- */
-
- #define MACH_RPC_DEBUG 1
-
- #define ERR_INFO 1 /* purely informational */
- #define ERR_GREEN 2 /* easily handled error */
- #define ERR_YELLOW 3 /* medium difficult error */
- #define ERR_RED 4 /* difficult to handle error */
- #define ERR_FATAL 5 /* unrecoverable error, panic */
-
- #if MACH_RPC_DEBUG > 1
- #define rpc_error(E,S) \
- printf("RPC error "); \
- rpc_error_show_severity(S); \
- printf("in file \"%s\", line %d: ", __FILE__, __LINE__); \
- printf E ; \
- printf("\n"); \
- rpc_error_severity(S)
- #else
- #define rpc_error(E,S) \
- if ((S) == ERR_FATAL || (S) == ERR_RED) { \
- printf("RPC error "); \
- rpc_error_show_severity(S); \
- printf("in file \"%s\", line %d: ", __FILE__, __LINE__); \
- printf E ; \
- printf("\n"); \
- rpc_error_severity(S); \
- }
- #endif /* MACH_RPC_DEBUG */
-
- /*
- * RPC buffer size and break points
- *
- * These values define the rpc buffer size on the kernel stack,
- * and break point values for switching to virtual copy (cow).
- * This should be in a machine dependent include file. All sizes
- * are in word (sizeof(int)) units.
- */
-
- #define RPC_KBUF_SIZE 16 /* kernel stack buffer size (ints) */
- #define RPC_COW_SIZE 1024 /* size where COW is a win (ints) */
- #define RPC_DESC_COUNT 4 /* default descriptor count */
-
-
- /*
- * RPC copy state
- *
- * Record the rpc copy state for arrays, so we can unwind our state
- * during error processing. There is one entry per complex (signatured)
- * argument. The first entry is marked COPY_TYPE_ALLOC_KRN if this record
- * itself was kalloc'd because the number of complex arg descriptors
- * exceeded the default value (RPC_DESC_COUNT). This is not a conflict
- * since the first argument is always the destination port, never an array.
- */
-
- #define COPY_TYPE_NO_COPY 0 /* nothing special */
- #define COPY_TYPE_ON_KSTACK 1 /* array is on kernel stack */
- #define COPY_TYPE_ON_SSTACK 2 /* array is on server stack */
- #define COPY_TYPE_VIRTUAL_IN 3 /* vm_map_copyin part of cow */
- #define COPY_TYPE_VIRTUAL_OUT_SVR 4 /* map cpyout svr part of cow */
- #define COPY_TYPE_VIRTUAL_OUT_CLN 5 /* map cpyout cln part of cow */
- #define COPY_TYPE_ALLOC_KRN 6 /* kernel kalloc'd for array */
- #define COPY_TYPE_ALLOC_SVR 7 /* vm_alloc'd in server space */
- #define COPY_TYPE_ALLOC_CLN 8 /* vm_alloc'd in client space */
- #define COPY_TYPE_PORT 9 /* plain port translated */
- #define COPY_TYPE_PORT_ARRAY 10 /* port array translated */
-
-
- /*
- * RPC types
- */
- typedef int rpc_id_t;
- typedef int rpc_return_t;
- typedef unsigned int rpc_size_t;
- typedef unsigned int rpc_offset_t;
-
- struct rpc_copy_state {
- unsigned copy_type; /* what kind of copy */
- vm_offset_t alloc_addr; /* address to free */
- };
- typedef struct rpc_copy_state *rpc_copy_state_t;
- typedef struct rpc_copy_state rpc_copy_state_data_t;
-
- typedef boolean_t (*copyfunc_t)(const char *, char *, vm_size_t);
-
-
- /*
- * RPC function declarations
- */
-
- #ifdef CALLOUT_RPC_MODEL
-
- extern
- void rpc_bootstrap( void );
-
- extern
- void rpc_remote_bootstrap( void );
-
- extern
- rpc_return_t mach_rpc_trap(
- mach_port_name_t dest_port,
- rpc_id_t routine_num,
- rpc_signature_t signature_ptr,
- rpc_size_t signature_size );
-
- extern
- rpc_return_t mach_rpc_return_trap( void );
-
- extern
- rpc_return_t mach_rpc_return_error( void );
-
- void mach_rpc_return_wrapper( void );
-
- void rpc_upcall(
- vm_offset_t stack,
- vm_offset_t new_stack,
- vm_offset_t server_func,
- int return_code );
-
- void rpc_error_severity( int severity );
- void rpc_error_show_severity( int severity );
- unsigned int name_rpc_to_ipc( unsigned int action );
-
- void clean_port_array(
- ipc_object_t * array,
- unsigned count,
- unsigned cooked,
- unsigned direct );
-
- void unwind_rpc_state(
- routine_descriptor_t routine,
- rpc_copy_state_t state,
- int * arg_buf );
-
- kern_return_t unwind_invoke_state(
- thread_act_t thr_act );
-
- kern_return_t rpc_invke_args_in(
- routine_descriptor_t routine,
- rpc_copy_state_t state,
- int * arg_buf,
- copyfunc_t infunc );
-
- kern_return_t rpc_invke_args_out(
- routine_descriptor_t routine,
- rpc_copy_state_t state,
- int * arg_buf,
- int ** new_sp,
- copyfunc_t outfunc );
-
- kern_return_t rpc_reply_args_in(
- routine_descriptor_t routine,
- rpc_copy_state_t state,
- int * svr_buf,
- copyfunc_t infunc );
-
- kern_return_t rpc_reply_args_out(
- routine_descriptor_t routine,
- rpc_copy_state_t state,
- int * svr_buf,
- int * cln_buf,
- copyfunc_t outfunc );
-
- #endif /* CALLOUT_RPC_MODEL */
-
- /*
- * libmach helper functions:
- */
- extern rpc_subsystem_t mach_subsystem_join(
- rpc_subsystem_t,
- rpc_subsystem_t,
- unsigned int *,
- void *(* )(int));
-
- #endif /* _MACH_RPC_H_ */
-
-
-