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04fee52e A |
1 | /* |
2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. | |
3 | * | |
4 | * @APPLE_LICENSE_HEADER_START@ | |
5 | * | |
8be739c0 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. | |
04fee52e | 11 | * |
8be739c0 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 | |
04fee52e A |
14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
8be739c0 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. | |
04fee52e A |
19 | * |
20 | * @APPLE_LICENSE_HEADER_END@ | |
21 | */ | |
22 | /* | |
23 | * elf.c - A function to decode a PPC Linux Kernel. | |
24 | * | |
25 | * Copyright (c) 2000 Apple Computer, Inc. | |
26 | * | |
27 | * DRI: Josh de Cesare | |
28 | */ | |
29 | ||
30 | #include <sl.h> | |
31 | ||
32 | #include "elf.h" | |
33 | ||
34 | // Public Functions | |
35 | ||
71019aa0 A |
36 | long ThinFatBinaryElf(void **binary, unsigned long *length) |
37 | { | |
38 | return -1; | |
39 | } | |
40 | ||
41 | long DecodeElf(void *binary) | |
04fee52e A |
42 | { |
43 | ElfHeaderPtr ehPtr; | |
44 | ProgramHeaderPtr phPtr; | |
45 | long cnt, paddr, offset, memsz, filesz, entry, *tmp; | |
46 | ||
71019aa0 | 47 | ehPtr = (ElfHeaderPtr)binary; |
04fee52e A |
48 | if (ehPtr->signature != kElfSignature) return 0; |
49 | ||
50 | entry = ehPtr->entry & kElfAddressMask; | |
51 | ||
52 | for (cnt = 0; cnt < ehPtr->phnum; cnt++) { | |
71019aa0 | 53 | phPtr = (ProgramHeaderPtr)((unsigned long)binary + ehPtr->phoff + cnt * ehPtr->phentsize); |
04fee52e A |
54 | |
55 | if (phPtr->type == kElfProgramTypeLoad) { | |
56 | paddr = phPtr->paddr & kElfAddressMask; | |
57 | offset = phPtr->offset; | |
58 | filesz = phPtr->filesz; | |
59 | memsz = phPtr->memsz; | |
60 | ||
61 | // Get the actual entry if it is in this program. | |
62 | if ((entry >= paddr) && (entry < (paddr + filesz))) { | |
71019aa0 | 63 | tmp = (long *)((unsigned long)binary + offset + entry); |
04fee52e A |
64 | if (tmp[2] == 0) entry += tmp[0]; |
65 | ||
66 | } | |
67 | entry += paddr; | |
68 | ||
69 | // Add the kernel to the memory-map. | |
70 | AllocateMemoryRange("Kernel-PROGRAM", 0, memsz); | |
71 | ||
72 | // Set the last address used by the kernel program. | |
73 | AllocateKernelMemory(paddr + memsz); | |
74 | ||
75 | if (paddr < kImageAddr) { | |
76 | // Copy the Vectors out of the way. | |
71019aa0 | 77 | bcopy((char *)((unsigned long)binary + offset), gVectorSaveAddr, |
04fee52e A |
78 | kVectorSize - paddr); |
79 | ||
80 | offset += kImageAddr - paddr; | |
81 | filesz -= kImageAddr - paddr; | |
82 | paddr = kImageAddr; | |
83 | } | |
84 | ||
85 | // Move the program. | |
71019aa0 | 86 | bcopy((char *)((unsigned long)binary + offset), (char *)paddr, filesz); |
04fee52e A |
87 | } |
88 | } | |
89 | ||
90 | return 0; | |
91 | } |