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| Source at commit 1580 created 12 years 9 months ago. By blackosx, Attempted to enable 'exclusive' choices in auto generated boot options, but it's not working at present. I've added notes to remind me to look again at some point. | |
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| 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 | |
