mirror of
https://github.com/darlinghq/darling-xnu.git
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100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
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* Copyright (c) 2017 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#include <mach/mach_types.h>
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#include <mach/vm_param.h>
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#include <string.h>
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#include <pexpert/pexpert.h>
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#include <kern/copyout_shim.h>
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#if (DEVELOPMENT || DEBUG)
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#define UNUSED_IN_RELEASE(x)
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#else
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//supress compiler warnings about unused variables
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#define UNUSED_IN_RELEASE(x) (void)(x)
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#endif /* (DEVELOPMENT || DEBUG) */
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#if (DEVELOPMENT || DEBUG)
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copyout_shim_fn_t copyout_shim_fn = NULL;
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unsigned co_src_flags = 0;
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#endif
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kern_return_t
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register_copyout_shim(void (*fn)(const void *, user_addr_t, vm_size_t, unsigned co_src), unsigned types)
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{
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#if (DEVELOPMENT || DEBUG)
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int copyout_shim_enabled = 0;
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if (!fn) {
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/* unregistration is always allowed */
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copyout_shim_fn = NULL;
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return KERN_SUCCESS;
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}
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if (copyout_shim_fn) {
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//need to unregister first before registering a new one.
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return KERN_FAILURE;
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}
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if (!PE_parse_boot_argn("enable_copyout_shim", ©out_shim_enabled, sizeof(copyout_shim_enabled)) || !copyout_shim_enabled) {
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return KERN_FAILURE;
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}
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co_src_flags = types;
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copyout_shim_fn = fn;
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return KERN_SUCCESS;
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#else
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UNUSED_IN_RELEASE(fn);
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UNUSED_IN_RELEASE(types);
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return KERN_FAILURE;
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#endif
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}
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void *
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cos_kernel_unslide(const void *ptr)
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{
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#if (DEVELOPMENT || DEBUG)
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return (void *)(VM_KERNEL_UNSLIDE(ptr));
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#else
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UNUSED_IN_RELEASE(ptr);
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return NULL;
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#endif
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}
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void *
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cos_kernel_reslide(const void *ptr)
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{
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#if (DEVELOPMENT || DEBUG)
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return (void *)(VM_KERNEL_SLIDE(ptr));
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#else
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UNUSED_IN_RELEASE(ptr);
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return NULL;
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#endif
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}
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