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1c79356b A |
1 | /* |
2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
3 | * | |
4 | * @APPLE_LICENSE_HEADER_START@ | |
5 | * | |
37839358 A |
6 | * The contents of this file constitute Original Code as defined in and |
7 | * are subject to the Apple Public Source License Version 1.1 (the | |
8 | * "License"). You may not use this file except in compliance with the | |
9 | * License. Please obtain a copy of the License at | |
10 | * http://www.apple.com/publicsource and read it before using this file. | |
1c79356b | 11 | * |
37839358 A |
12 | * This Original Code and all software distributed under the License are |
13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
1c79356b A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
37839358 A |
16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
17 | * License for the specific language governing rights and limitations | |
18 | * under the License. | |
1c79356b A |
19 | * |
20 | * @APPLE_LICENSE_HEADER_END@ | |
21 | */ | |
22 | /* Copyright (c) 1991 NeXT Computer, Inc. All rights reserved. | |
23 | * | |
24 | * File: kern/mach_fat.c | |
25 | * Author: Peter King | |
26 | * | |
27 | * Fat file support routines. | |
28 | * | |
29 | */ | |
30 | ||
31 | #include <sys/param.h> | |
32 | #include <sys/types.h> | |
33 | #include <sys/uio.h> | |
34 | #include <sys/vnode.h> | |
35 | #include <vm/vm_kern.h> | |
36 | #include <mach/kern_return.h> | |
37 | #include <mach/vm_param.h> | |
38 | #include <kern/cpu_number.h> | |
39 | #include <mach-o/fat.h> | |
40 | #include <kern/mach_loader.h> | |
41 | #include <architecture/byte_order.h> | |
42 | ||
91447636 A |
43 | /* XXX should be in common header */ |
44 | extern int grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype); | |
45 | ||
46 | #define CPU_TYPE_NATIVE (cpu_type()) | |
55e303ae | 47 | #define CPU_TYPE_CLASSIC CPU_TYPE_POWERPC |
1c79356b A |
48 | |
49 | /********************************************************************** | |
55e303ae | 50 | * Routine: fatfile_getarch2() |
1c79356b A |
51 | * |
52 | * Function: Locate the architecture-dependant contents of a fat | |
53 | * file that match this CPU. | |
54 | * | |
55 | * Args: vp: The vnode for the fat file. | |
56 | * header: A pointer to the fat file header. | |
91447636 A |
57 | * req_cpu_type: The required cpu type. |
58 | * mask_bits: Bits to mask from the sub-image type when | |
59 | * grading it vs. the req_cpu_type | |
1c79356b A |
60 | * archret (out): Pointer to fat_arch structure to hold |
61 | * the results. | |
62 | * | |
63 | * Returns: KERN_SUCCESS: Valid architecture found. | |
64 | * KERN_FAILURE: No valid architecture found. | |
65 | **********************************************************************/ | |
55e303ae A |
66 | static load_return_t |
67 | fatfile_getarch2( | |
91447636 | 68 | #if 0 |
55e303ae | 69 | struct vnode *vp, |
91447636 A |
70 | #else |
71 | __unused struct vnode *vp, | |
72 | #endif | |
55e303ae | 73 | vm_offset_t data_ptr, |
91447636 A |
74 | cpu_type_t req_cpu_type, |
75 | cpu_type_t mask_bits, | |
55e303ae | 76 | struct fat_arch *archret) |
1c79356b A |
77 | { |
78 | /* vm_pager_t pager; */ | |
79 | vm_offset_t addr; | |
80 | vm_size_t size; | |
1c79356b | 81 | load_return_t lret; |
1c79356b A |
82 | struct fat_arch *arch; |
83 | struct fat_arch *best_arch; | |
84 | int grade; | |
85 | int best_grade; | |
86 | int nfat_arch; | |
87 | int end_of_archs; | |
1c79356b | 88 | struct fat_header *header; |
91447636 | 89 | #if 0 |
1c79356b | 90 | off_t filesize; |
91447636 | 91 | #endif |
1c79356b A |
92 | |
93 | /* | |
94 | * Get the pager for the file. | |
95 | */ | |
96 | ||
97 | header = (struct fat_header *)data_ptr; | |
98 | ||
99 | /* | |
100 | * Map portion that must be accessible directly into | |
101 | * kernel's map. | |
102 | */ | |
103 | nfat_arch = NXSwapBigLongToHost(header->nfat_arch); | |
104 | ||
105 | end_of_archs = sizeof(struct fat_header) | |
106 | + nfat_arch * sizeof(struct fat_arch); | |
107 | #if 0 | |
108 | filesize = ubc_getsize(vp); | |
0b4e3aa0 | 109 | if (end_of_archs > (int)filesize) { |
1c79356b A |
110 | return(LOAD_BADMACHO); |
111 | } | |
112 | #endif | |
113 | ||
114 | /* This is beacuse we are reading only 512 bytes */ | |
115 | ||
116 | if (end_of_archs > 512) | |
117 | return(LOAD_BADMACHO); | |
118 | /* | |
119 | * Round size of fat_arch structures up to page boundry. | |
120 | */ | |
55e303ae | 121 | size = round_page_32(end_of_archs); |
91447636 | 122 | if (size == 0) |
1c79356b A |
123 | return(LOAD_BADMACHO); |
124 | ||
125 | /* | |
126 | * Scan the fat_arch's looking for the best one. | |
127 | */ | |
128 | addr = data_ptr; | |
1c79356b A |
129 | best_arch = NULL; |
130 | best_grade = 0; | |
131 | arch = (struct fat_arch *) (addr + sizeof(struct fat_header)); | |
132 | for (; nfat_arch-- > 0; arch++) { | |
133 | ||
134 | /* | |
135 | * Check to see if right cpu type. | |
136 | */ | |
91447636 | 137 | if(((cpu_type_t)NXSwapBigIntToHost(arch->cputype) & ~mask_bits) != req_cpu_type) |
1c79356b A |
138 | continue; |
139 | ||
140 | /* | |
141 | * Get the grade of the cpu subtype. | |
142 | */ | |
91447636 A |
143 | grade = grade_binary( |
144 | NXSwapBigIntToHost(arch->cputype), | |
1c79356b A |
145 | NXSwapBigIntToHost(arch->cpusubtype)); |
146 | ||
147 | /* | |
148 | * Remember it if it's the best we've seen. | |
149 | */ | |
150 | if (grade > best_grade) { | |
151 | best_grade = grade; | |
152 | best_arch = arch; | |
153 | } | |
154 | } | |
155 | ||
156 | /* | |
157 | * Return our results. | |
158 | */ | |
159 | if (best_arch == NULL) { | |
160 | lret = LOAD_BADARCH; | |
161 | } else { | |
162 | archret->cputype = | |
163 | NXSwapBigIntToHost(best_arch->cputype); | |
164 | archret->cpusubtype = | |
165 | NXSwapBigIntToHost(best_arch->cpusubtype); | |
166 | archret->offset = | |
167 | NXSwapBigLongToHost(best_arch->offset); | |
168 | archret->size = | |
169 | NXSwapBigLongToHost(best_arch->size); | |
170 | archret->align = | |
171 | NXSwapBigLongToHost(best_arch->align); | |
172 | ||
173 | lret = LOAD_SUCCESS; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Free the memory we allocated and return. | |
178 | */ | |
179 | return(lret); | |
180 | } | |
181 | ||
55e303ae A |
182 | extern char classichandler[]; |
183 | ||
184 | load_return_t | |
185 | fatfile_getarch_affinity( | |
186 | struct vnode *vp, | |
187 | vm_offset_t data_ptr, | |
188 | struct fat_arch *archret, | |
189 | int affinity) | |
190 | { | |
191 | load_return_t lret; | |
192 | int handler = (classichandler[0] != 0); | |
193 | cpu_type_t primary_type, fallback_type; | |
194 | ||
195 | if (handler && affinity) { | |
196 | primary_type = CPU_TYPE_CLASSIC; | |
197 | fallback_type = CPU_TYPE_NATIVE; | |
198 | } else { | |
199 | primary_type = CPU_TYPE_NATIVE; | |
200 | fallback_type = CPU_TYPE_CLASSIC; | |
201 | } | |
91447636 A |
202 | /* |
203 | * Ignore the architectural bits when determining if an image | |
204 | * in a fat file should be skipped or graded. | |
205 | */ | |
206 | lret = fatfile_getarch2(vp, data_ptr, primary_type, CPU_ARCH_MASK, archret); | |
55e303ae A |
207 | if ((lret != 0) && handler) { |
208 | lret = fatfile_getarch2(vp, data_ptr, fallback_type, | |
91447636 | 209 | 0, archret); |
55e303ae A |
210 | } |
211 | return lret; | |
212 | } | |
213 | ||
214 | /********************************************************************** | |
215 | * Routine: fatfile_getarch() | |
216 | * | |
217 | * Function: Locate the architecture-dependant contents of a fat | |
218 | * file that match this CPU. | |
219 | * | |
220 | * Args: vp: The vnode for the fat file. | |
221 | * header: A pointer to the fat file header. | |
222 | * archret (out): Pointer to fat_arch structure to hold | |
223 | * the results. | |
224 | * | |
225 | * Returns: KERN_SUCCESS: Valid architecture found. | |
226 | * KERN_FAILURE: No valid architecture found. | |
227 | **********************************************************************/ | |
228 | load_return_t | |
229 | fatfile_getarch( | |
230 | struct vnode *vp, | |
231 | vm_offset_t data_ptr, | |
232 | struct fat_arch *archret) | |
233 | { | |
91447636 A |
234 | return fatfile_getarch2(vp, data_ptr, CPU_TYPE_NATIVE, 0, archret); |
235 | } | |
236 | ||
237 | /********************************************************************** | |
238 | * Routine: fatfile_getarch_with_bits() | |
239 | * | |
240 | * Function: Locate the architecture-dependant contents of a fat | |
241 | * file that match this CPU. | |
242 | * | |
243 | * Args: vp: The vnode for the fat file. | |
244 | * archbits: Architecture specific feature bits | |
245 | * header: A pointer to the fat file header. | |
246 | * archret (out): Pointer to fat_arch structure to hold | |
247 | * the results. | |
248 | * | |
249 | * Returns: KERN_SUCCESS: Valid architecture found. | |
250 | * KERN_FAILURE: No valid architecture found. | |
251 | **********************************************************************/ | |
252 | load_return_t | |
253 | fatfile_getarch_with_bits( | |
254 | struct vnode *vp, | |
255 | integer_t archbits, | |
256 | vm_offset_t data_ptr, | |
257 | struct fat_arch *archret) | |
258 | { | |
259 | return fatfile_getarch2(vp, data_ptr, archbits | CPU_TYPE_NATIVE, 0, archret); | |
55e303ae | 260 | } |
1c79356b | 261 |