| 1 | /*␊ |
| 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * This file contains Original Code and/or Modifications of Original Code␊ |
| 7 | * as defined in and that are subject to the Apple Public Source License␊ |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
| 9 | * compliance with the License. Please obtain a copy of the License at␊ |
| 10 | * http://www.opensource.apple.com/apsl/ and read it before using this␊ |
| 11 | * file.␊ |
| 12 | * ␊ |
| 13 | * The Original Code and all software distributed under the License are␊ |
| 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 18 | * Please see the License for the specific language governing rights and␊ |
| 19 | * limitations under the License.␊ |
| 20 | * ␊ |
| 21 | * @APPLE_LICENSE_HEADER_END@␊ |
| 22 | */␊ |
| 23 | /*␊ |
| 24 | * Relocation types used in the ppc implementation. Relocation entries for␊ |
| 25 | * things other than instructions use the same generic relocation as discribed␊ |
| 26 | * above and their r_type is RELOC_VANILLA. The rest of the relocation types␊ |
| 27 | * are for instructions. Since they are for instructions the r_address field␊ |
| 28 | * indicates the 32 bit instruction that the relocation is to be preformed on.␊ |
| 29 | * The fields r_pcrel and r_length are ignored for non-RELOC_VANILLA r_types␊ |
| 30 | * except for PPC_RELOC_BR14.␊ |
| 31 | *␊ |
| 32 | * For PPC_RELOC_BR14 if the r_length is the unused value 3, then the branch was␊ |
| 33 | * statically predicted setting or clearing the Y-bit based on the sign of the␊ |
| 34 | * displacement or the opcode. If this is the case the static linker must flip␊ |
| 35 | * the value of the Y-bit if the sign of the displacement changes for non-branch␊ |
| 36 | * always conditions.␊ |
| 37 | */␊ |
| 38 | enum reloc_type_ppc␊ |
| 39 | {␊ |
| 40 | PPC_RELOC_VANILLA,␉/* generic relocation as discribed above */␊ |
| 41 | PPC_RELOC_PAIR,␉/* the second relocation entry of a pair */␊ |
| 42 | PPC_RELOC_BR14,␉/* 14 bit branch displacement (to a word address) */␊ |
| 43 | PPC_RELOC_BR24,␉/* 24 bit branch displacement (to a word address) */␊ |
| 44 | PPC_RELOC_HI16,␉/* a PAIR follows with the low half */␊ |
| 45 | PPC_RELOC_LO16,␉/* a PAIR follows with the high half */␊ |
| 46 | PPC_RELOC_HA16,␉/* Same as the RELOC_HI16 except the low 16 bits and the␊ |
| 47 | ␉␉␉ * high 16 bits are added together with the low 16 bits␊ |
| 48 | ␉␉␉ * sign extened first. This means if bit 15 of the low␊ |
| 49 | ␉␉␉ * 16 bits is set the high 16 bits stored in the␊ |
| 50 | ␉␉␉ * instruction will be adjusted.␊ |
| 51 | ␉␉␉ */␊ |
| 52 | PPC_RELOC_LO14,␉/* Same as the LO16 except that the low 2 bits are not␊ |
| 53 | ␉␉␉ * stored in the instruction and are always zero. This␊ |
| 54 | ␉␉␉ * is used in double word load/store instructions.␊ |
| 55 | ␉␉␉ */␊ |
| 56 | PPC_RELOC_SECTDIFF,␉/* a PAIR follows with subtract symbol value */␊ |
| 57 | PPC_RELOC_PB_LA_PTR,/* prebound lazy pointer */␊ |
| 58 | PPC_RELOC_HI16_SECTDIFF, /* section difference forms of above. a PAIR */␊ |
| 59 | PPC_RELOC_LO16_SECTDIFF, /* follows these with subtract symbol value */␊ |
| 60 | PPC_RELOC_HA16_SECTDIFF,␊ |
| 61 | PPC_RELOC_JBSR,␊ |
| 62 | PPC_RELOC_LO14_SECTDIFF,␊ |
| 63 | PPC_RELOC_LOCAL_SECTDIFF /* like PPC_RELOC_SECTDIFF, but the symbol␊ |
| 64 | ␉␉␉␉ referenced was local. */␊ |
| 65 | };␊ |
| 66 | |
