/* * Copyright (c) 1999 Apple Computer, 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@ */ /* * Relocation types used in the arm implementation. Relocation entries for * things other than instructions use the same generic relocation as discribed * in <mach-o/reloc.h> and their r_type is ARM_RELOC_VANILLA, one of the * *_SECTDIFF or the *_PB_LA_PTR types. The rest of the relocation types are * for instructions. Since they are for instructions the r_address field * indicates the 32 bit instruction that the relocation is to be preformed on. */ enum reloc_type_arm { ARM_RELOC_VANILLA, /* generic relocation as discribed above */ ARM_RELOC_PAIR, /* the second relocation entry of a pair */ ARM_RELOC_SECTDIFF, /* a PAIR follows with subtract symbol value */ ARM_RELOC_LOCAL_SECTDIFF, /* like ARM_RELOC_SECTDIFF, but the symbol referenced was local. */ ARM_RELOC_PB_LA_PTR,/* prebound lazy pointer */ ARM_RELOC_BR24, /* 24 bit branch displacement (to a word address) */ ARM_THUMB_RELOC_BR22, /* 22 bit branch displacement (to a half-word address) */ ARM_THUMB_32BIT_BRANCH, /* obsolete - a thumb 32-bit branch instruction possibly needing page-spanning branch workaround */ /* * For these two r_type relocations they always have a pair following them * and the r_length bits are used differently. The encoding of the * r_length is as follows: * low bit of r_length: * 0 - :lower16: for movw instructions * 1 - :upper16: for movt instructions * high bit of r_length: * 0 - arm instructions * 1 - thumb instructions * the other half of the relocated expression is in the following pair * relocation entry in the the low 16 bits of r_address field. */ ARM_RELOC_HALF, ARM_RELOC_HALF_SECTDIFF };