source: trunk/kStuff/kLdr/kLdrMisc.c@ 3579

Last change on this file since 3579 was 3579, checked in by bird, 18 years ago

error code cleanup.
  • Property svn:keywords set to Id
File size: 5.1 KB
Line 
1/* $Id: kLdrMisc.c 3579 2007-09-02 21:40:41Z bird $ */
2/** @file
3 *
4 * kLdr - The Dynamic Loader, Misc APIs.
5 *
6 * Copyright (c) 2006-2007 knut st. osmundsen <bird@anduin.net>
7 *
8 *
9 * This file is part of kLdr.
10 *
11 * kLdr is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * kLdr is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with kLdr; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 *
25 */
26
27
28/*******************************************************************************
29* Header Files *
30*******************************************************************************/
31#include <k/kLdr.h>
32#include "kLdrInternal.h"
33
34
35/**
36 * Compares arch+cpu some code was generated for with a arch+cpu for executing it
37 * to see if it'll work out fine or not.
38 *
39 * @returns 0 if the code is compatible with the cpu.
40 * @returns KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE if the arch+cpu isn't compatible with the code.
41 * @param enmCodeArch The architecture the code was generated for.
42 * @param enmCodeCpu The cpu the code was generated for.
43 * @param enmArch The architecture to run it on.
44 * @param enmCpu The cpu to run it on.
45 */
46int kLdrCompareCpus(KLDRARCH enmCodeArch, KLDRCPU enmCodeCpu, KLDRARCH enmArch, KLDRCPU enmCpu)
47{
48 /*
49 * Compare arch and cpu.
50 */
51 if (enmCodeArch != enmArch)
52 return KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
53
54 /* exact match is nice. */
55 if (enmCodeCpu == enmCpu)
56 return 0;
57 switch (enmArch)
58 {
59 case KLDRARCH_X86_16:
60 if (enmCpu < KLDRCPU_FIRST_X86_16 || enmCpu > KLDRCPU_LAST_X86_16)
61 return KERR_INVALID_PARAMETER;
62
63 /* intel? */
64 if (enmCodeCpu <= KLDRCPU_CORE2_16)
65 {
66 /* also intel? */
67 if (enmCpu <= KLDRCPU_CORE2_16)
68 return enmCodeCpu <= enmCpu ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
69 switch (enmCpu)
70 {
71 case KLDRCPU_K6_16:
72 return enmCodeCpu <= KLDRCPU_I586 ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
73 case KLDRCPU_K7_16:
74 case KLDRCPU_K8_16:
75 default:
76 return enmCodeCpu <= KLDRCPU_I686 ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
77 }
78 }
79 /* amd */
80 return enmCpu >= KLDRCPU_K6_16 && enmCpu <= KLDRCPU_K8_16
81 ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
82
83 case KLDRARCH_X86_32:
84 if (enmCpu < KLDRCPU_FIRST_X86_32 || enmCpu > KLDRCPU_LAST_X86_32)
85 return KERR_INVALID_PARAMETER;
86
87 /* blend? */
88 if (enmCodeCpu == KLDRCPU_X86_32_BLEND)
89 return 0;
90
91 /* intel? */
92 if (enmCodeCpu <= KLDRCPU_CORE2_32)
93 {
94 /* also intel? */
95 if (enmCpu <= KLDRCPU_CORE2_32)
96 return enmCodeCpu <= enmCpu ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
97 switch (enmCpu)
98 {
99 case KLDRCPU_K6:
100 return enmCodeCpu <= KLDRCPU_I586 ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
101 case KLDRCPU_K7:
102 case KLDRCPU_K8_32:
103 default:
104 return enmCodeCpu <= KLDRCPU_I686 ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
105 }
106 }
107 /* amd */
108 return enmCpu >= KLDRCPU_K6 && enmCpu <= KLDRCPU_K8_32
109 ? 0 : KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
110
111 case KLDRARCH_AMD64:
112 if (enmCpu < KLDRCPU_FIRST_AMD64 || enmCpu > KLDRCPU_LAST_AMD64)
113 return KERR_INVALID_PARAMETER;
114
115 /* blend? */
116 if (enmCodeCpu == KLDRCPU_AMD64_BLEND)
117 return 0;
118 /* this is simple for now. */
119 return KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
120
121 default:
122 break;
123 }
124 return KLDR_ERR_ARCH_CPU_NOT_COMPATIBLE;
125}
126
127
128/**
129 * Gets the arch+cpu of the calling cpu.
130 *
131 * @param penmArch Where to store the cpu architecture.
132 * @param penmCpu Where to store the cpu brand/model.
133 */
134void kLdrGetArchCpu(PKLDRARCH penmArch, PKLDRCPU penmCpu)
135{
136#ifdef __AMD64__
137 *penmArch = KLDRARCH_AMD64;
138 *penmCpu = KLDRCPU_AMD64_BLEND; /** @todo check it using cpu. */
139
140#elif defined(__X86__)
141 *penmArch = KLDRARCH_X86_32;
142 *penmCpu = KLDRCPU_X86_32_BLEND; /** @todo check it using cpu. */
143
144#else
145# error "Port me"
146#endif
147}
148
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