+++ /dev/null
-/*
- * Copyright (c) 2004-2006 Apple Inc. All rights reserved.
- *
- * @APPLE_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. 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_LICENSE_HEADER_END@
- */
-/*
- Layout of the "objc runtime pages", an fixed area
- in high memory that can be reached via an absolute branch.
- Basic idea is that, on ppc, a single "bla" instruction
- (branch & link to absolute address)
- can be issued by the compiler to get to high-value routines
- in the runtime, including the basic messenger and to the
- assignment helper intrinsics issued under -fobjc-gc.
- The implementation of the intrinsics is optimized based
- on whether the application (process) is running with GC enabled
- or not.
-*/
-
-#ifndef _OBJC_RTP_H_
-#define _OBJC_RTP_H_
-
-/*********************************************************************
- Layout of the runtime page.
-
- Some of these values must NEVER BE CHANGED, including:
- kRTPagesLo
- kRTPagesHi
- kRTPagesMaxSize
- kRTSize_objc_msgSend
- kRTSize_objc_assign_ivar
- kRTAddress_objc_msgSend ppc 0xfffeff00
- kRTAddress_objc_assign_ivar ppc 0xfffefec0
-
-*********************************************************************/
-
-#undef OBJC_SIZE_T
-#undef OBJC_INTPTR_T
-#undef OBJC_UINTPTR_T
-
-#ifdef OBJC_ASM
-#define OBJC_SIZE_T(x) (x)
-#define OBJC_INTPTR_T(x) (x)
-#define OBJC_UINTPTR_T(x) (x)
-#else
-#define OBJC_SIZE_T(x) ((size_t)(x))
-#define OBJC_INTPTR_T(x) ((intptr_t)(x))
-#define OBJC_UINTPTR_T(x) ((uintptr_t)(x))
-#endif
-
-// Size of RTP area, in bytes (0x1000 = 4k bytes = 1 page)
-#define kRTPagesMaxSize OBJC_SIZE_T(4 * 0x1000) // size reserved for runtime
-#define kRTPagesSize OBJC_SIZE_T(1 * 0x1000) // size actually used
-
-// Address of RTP area: [kRTPagesLo..kRTPagesHi)
-// These are defined in negative numbers to reflect an offset from the highest address,
-// which is what the ppc "bla" instruction is defined to do with "negative" addresses.
-// This definition will establish the correct entry points for 64-bit if this mechanism
-// is adopted for that architecture as well.
-#if defined(__ppc__) || defined(__ppc64__)
-# define kRTPagesLo OBJC_UINTPTR_T(-20 * 0x1000) // ppc 0xfffec000
-#elif defined(__i386__)
-# define kRTPagesLo OBJC_UINTPTR_T(-24 * 0x1000) // i386 0xfffe8000
-#elif defined(__x86_64__)
-# define kRTPagesLo OBJC_UINTPTR_T(-24 * 0x1000) // x86_64 0xfffffffffffe8000
-#elif defined(__arm__) || defined(TARGET_OS_WIN32)
-# define kRTPagesLo OBJC_UINTPTR_T(0)
-#else
- #error unknown architecture
-#endif
-#define kRTPagesHi OBJC_UINTPTR_T(kRTPagesLo + kRTPagesMaxSize) // ppc 0xffff0000
-
-// Sizes reserved for functions in the RTP area, in bytes
-#define kRTSize_objc_msgSend OBJC_SIZE_T(0x0100)
-#define kRTSize_objc_assign_ivar OBJC_SIZE_T(0x0040)
-#define kRTSize_objc_assign_global OBJC_SIZE_T(0x0010)
-#define kRTSize_objc_assign_strongCast OBJC_SIZE_T(0x0010)
-
-// Absolute address of functions in the RTP area
-// These count backwards from the hi end of the RTP area.
-// New additions are added to the low side.
-#define kRTAddress_objc_msgSend OBJC_UINTPTR_T(kRTPagesHi - kRTSize_objc_msgSend) // ppc 0xfffeff00
-#define kRTAddress_objc_assign_ivar OBJC_UINTPTR_T(kRTAddress_objc_msgSend - kRTSize_objc_assign_ivar) // ppc 0xfffefec0
-#define kRTAddress_objc_assign_global OBJC_UINTPTR_T(kRTAddress_objc_assign_ivar - kRTSize_objc_assign_global) // ppc 0xfffefeb0
-#define kRTAddress_objc_assign_strongCast OBJC_UINTPTR_T(kRTAddress_objc_assign_global - kRTSize_objc_assign_strongCast) // ppc 0xfffefea0
-
-// Sizes reserved for data in the RTP area, in bytes
-#define kRTSize_zero OBJC_SIZE_T(16) // 16 zero bytes
-#define kRTSize_ignoredSelector OBJC_SIZE_T(19) // 1+strlen("<ignored selector>")
-
-// Absolute address of data in the RTP area
-// These count forwards from the lo end of the RTP area.
-// These are not locked down and can be moved if necessary.
-#define kRTAddress_zero OBJC_UINTPTR_T(kRTPagesHi-kRTPagesSize)
-#define kRTAddress_ignoredSelector OBJC_UINTPTR_T(kRTAddress_zero+kRTSize_zero)
-
-#define kIgnore kRTAddress_ignoredSelector // ppc 0xfffef000
-
-/*********************************************************************
- End of runtime page layout.
-*********************************************************************/
-
-#endif
projects / apple / objc4.git / blobdiff