Mark Mentovai 8dbbaff2e1 ios: Provide a copy of exc.defs and run mig on it to generate exc stubs
The iOS SDK doesn’t include a copy of <mach/exc.defs>. It only provides
<mach/exc.h>, which is just the user-side header. To obtain declarations
and implementations of the server-side stubs, a current copy of
<mach/exc.defs> is added to third_party, and the mig action in util is
updated to use it on iOS.

The three other mig subsystems that Crashpad uses are not brought to
iOS:
 - mach_exc is identical to exc except it always uses 64-bit quantities
   for addresses in place of exc’s use of quantiies sized for native
   pointers. Because all iOS work is limited to a single process, there
   is no need to consider cross-process operation with variable bitness,
   so mach_exc is unnecessary. We’re also only targeting 64-bit for iOS,
   so exc will always suffice. This follows the spirit of other
   mach_-prefixed routines on iOS, where Apple forbids mach_vm_read to
   user applications but permits vm_read.
 - notify is primarily used on macOS in the Crashpad handler process to
   receive a no-senders notification, which is used to trigger handler
   shutdown when it has no more clients. This is not believed to be
   useful to Crashpad on iOS, which is restricted to single-process
   operation.
 - child_port is a Crashpad-specific subsystem used to pass Mach rights
   between processes, but is similarly useless when restricted to
   single-process operation as on iOS.

Bug: crashpad:31
Change-Id: Id4cb3cdd529814438d378c20702c82c1e89dd2be
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2154530
Commit-Queue: Mark Mentovai <mark@chromium.org>
Reviewed-by: Justin Cohen <justincohen@chromium.org>
2020-04-17 21:11:57 +00:00

134 lines
3.9 KiB
C

/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
*/
/*
* Abstract:
* MiG definitions file for Mach exception interface.
*/
subsystem
#if KERNEL_SERVER
KernelServer
#endif /* KERNEL_SERVER */
#if KERNEL_USER
KernelUser
#endif
exc 2401;
#include <mach/std_types.defs>
#include <mach/mach_types.defs>
ServerPrefix catch_;
type exception_data_t = array[*:2] of integer_t;
type exception_type_t = int;
routine exception_raise(
exception_port : mach_port_t;
thread : mach_port_t;
task : mach_port_t;
exception : exception_type_t;
code : exception_data_t
#if EXC_SERVER_SECTOKEN
;
ServerSecToken stoken : security_token_t
#endif
#if EXC_SERVER_AUDITTOKEN
;
ServerAuditToken atoken: audit_token_t
#endif
);
routine exception_raise_state(
exception_port : mach_port_t;
exception : exception_type_t;
code : exception_data_t, const;
inout flavor : int;
old_state : thread_state_t, const;
out new_state : thread_state_t
#if EXC_SERVER_SECTOKEN
;
ServerSecToken stoken : security_token_t
#endif
#if EXC_SERVER_AUDITTOKEN
;
ServerAuditToken atoken: audit_token_t
#endif
);
routine exception_raise_state_identity(
exception_port : mach_port_t;
thread : mach_port_t;
task : mach_port_t;
exception : exception_type_t;
code : exception_data_t;
inout flavor : int;
old_state : thread_state_t;
out new_state : thread_state_t
#if EXC_SERVER_SECTOKEN
;
ServerSecToken stoken : security_token_t
#endif
#if EXC_SERVER_AUDITTOKEN
;
ServerAuditToken atoken: audit_token_t
#endif
);
/* vim: set ft=c : */