mirror of
https://github.com/darlinghq/darling-objc4.git
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156 lines
6.3 KiB
C
156 lines
6.3 KiB
C
/*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 2018 Apple Inc. All Rights Reserved.
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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. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* 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_LICENSE_HEADER_END@
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*/
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/********************************************************************
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*
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* isa.h - Definitions of isa fields for C and assembly code.
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*
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********************************************************************/
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#ifndef _OBJC_ISA_H_
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#define _OBJC_ISA_H_
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#include "objc-config.h"
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#if (!SUPPORT_NONPOINTER_ISA && !SUPPORT_PACKED_ISA && !SUPPORT_INDEXED_ISA) ||\
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( SUPPORT_NONPOINTER_ISA && SUPPORT_PACKED_ISA && !SUPPORT_INDEXED_ISA) ||\
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( SUPPORT_NONPOINTER_ISA && !SUPPORT_PACKED_ISA && SUPPORT_INDEXED_ISA)
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// good config
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#else
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# error bad config
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#endif
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#if SUPPORT_PACKED_ISA
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// extra_rc must be the MSB-most field (so it matches carry/overflow flags)
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// nonpointer must be the LSB (fixme or get rid of it)
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// shiftcls must occupy the same bits that a real class pointer would
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// bits + RC_ONE is equivalent to extra_rc + 1
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// RC_HALF is the high bit of extra_rc (i.e. half of its range)
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// future expansion:
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// uintptr_t fast_rr : 1; // no r/r overrides
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// uintptr_t lock : 2; // lock for atomic property, @synch
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// uintptr_t extraBytes : 1; // allocated with extra bytes
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# if __arm64__
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// ARM64 simulators have a larger address space, so use the ARM64e
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// scheme even when simulators build for ARM64-not-e.
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# if __has_feature(ptrauth_calls) || TARGET_OS_SIMULATOR
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# define ISA_MASK 0x007ffffffffffff8ULL
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# define ISA_MAGIC_MASK 0x0000000000000001ULL
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# define ISA_MAGIC_VALUE 0x0000000000000001ULL
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# define ISA_HAS_CXX_DTOR_BIT 0
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# define ISA_BITFIELD \
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uintptr_t nonpointer : 1; \
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uintptr_t has_assoc : 1; \
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uintptr_t weakly_referenced : 1; \
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uintptr_t shiftcls_and_sig : 52; \
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uintptr_t has_sidetable_rc : 1; \
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uintptr_t extra_rc : 8
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# define RC_ONE (1ULL<<56)
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# define RC_HALF (1ULL<<7)
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# else
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# define ISA_MASK 0x0000000ffffffff8ULL
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# define ISA_MAGIC_MASK 0x000003f000000001ULL
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# define ISA_MAGIC_VALUE 0x000001a000000001ULL
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# define ISA_HAS_CXX_DTOR_BIT 1
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# define ISA_BITFIELD \
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uintptr_t nonpointer : 1; \
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uintptr_t has_assoc : 1; \
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uintptr_t has_cxx_dtor : 1; \
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uintptr_t shiftcls : 33; /*MACH_VM_MAX_ADDRESS 0x1000000000*/ \
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uintptr_t magic : 6; \
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uintptr_t weakly_referenced : 1; \
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uintptr_t unused : 1; \
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uintptr_t has_sidetable_rc : 1; \
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uintptr_t extra_rc : 19
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# define RC_ONE (1ULL<<45)
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# define RC_HALF (1ULL<<18)
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# endif
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# elif __x86_64__
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# define ISA_MASK 0x00007ffffffffff8ULL
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# define ISA_MAGIC_MASK 0x001f800000000001ULL
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# define ISA_MAGIC_VALUE 0x001d800000000001ULL
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# define ISA_HAS_CXX_DTOR_BIT 1
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# define ISA_BITFIELD \
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uintptr_t nonpointer : 1; \
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uintptr_t has_assoc : 1; \
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uintptr_t has_cxx_dtor : 1; \
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uintptr_t shiftcls : 44; /*MACH_VM_MAX_ADDRESS 0x7fffffe00000*/ \
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uintptr_t magic : 6; \
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uintptr_t weakly_referenced : 1; \
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uintptr_t unused : 1; \
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uintptr_t has_sidetable_rc : 1; \
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uintptr_t extra_rc : 8
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# define RC_ONE (1ULL<<56)
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# define RC_HALF (1ULL<<7)
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# else
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# error unknown architecture for packed isa
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# endif
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// SUPPORT_PACKED_ISA
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#endif
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#if SUPPORT_INDEXED_ISA
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# if __ARM_ARCH_7K__ >= 2 || (__arm64__ && !__LP64__)
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// armv7k or arm64_32
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# define ISA_INDEX_IS_NPI_BIT 0
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# define ISA_INDEX_IS_NPI_MASK 0x00000001
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# define ISA_INDEX_MASK 0x0001FFFC
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# define ISA_INDEX_SHIFT 2
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# define ISA_INDEX_BITS 15
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# define ISA_INDEX_COUNT (1 << ISA_INDEX_BITS)
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# define ISA_INDEX_MAGIC_MASK 0x001E0001
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# define ISA_INDEX_MAGIC_VALUE 0x001C0001
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# define ISA_HAS_CXX_DTOR_BIT 1
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# define ISA_BITFIELD \
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uintptr_t nonpointer : 1; \
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uintptr_t has_assoc : 1; \
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uintptr_t indexcls : 15; \
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uintptr_t magic : 4; \
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uintptr_t has_cxx_dtor : 1; \
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uintptr_t weakly_referenced : 1; \
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uintptr_t unused : 1; \
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uintptr_t has_sidetable_rc : 1; \
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uintptr_t extra_rc : 7
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# define RC_ONE (1ULL<<25)
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# define RC_HALF (1ULL<<6)
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# else
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# error unknown architecture for indexed isa
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# endif
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// SUPPORT_INDEXED_ISA
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#endif
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// _OBJC_ISA_H_
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#endif
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