| 1 | /* $Id: kLdrHlp.h 2883 2006-11-18 11:21:33Z bird $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * kLdr - The Dynamic Loader, Helper Functions.
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| 5 | *
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| 6 | * Copyright (c) 2006 knut st. osmundsen <bird@anduin.net>
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| 7 | *
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| 8 | *
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| 9 | * This file is part of kLdr.
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| 10 | *
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| 11 | * kLdr is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * kLdr is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with kLdr; if not, write to the Free Software
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| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 24 | *
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| 25 | */
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| 26 |
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| 27 |
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| 28 | #ifndef __kLdrHlp_h__
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| 29 | #define __kLdrHlp_h__
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| 30 |
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| 31 | /** @defgroup grp_kLdrHlp kLdrHlp - Helper Functions
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| 32 | * @internal
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| 33 | * @{ */
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| 34 |
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| 35 | /** Get the minimum of two values. */
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| 36 | #define KLDR_MIN(a, b) ((a) <= (b) ? (a) : (b))
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| 37 | /** Get the maximum of two values. */
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| 38 | #define KLDR_MAX(a, b) ((a) >= (b) ? (a) : (b))
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| 39 | /** Calculate the offset of a structure member. */
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| 40 | #define KLDR_OFFSETOF(strct, memb) ( (size_t)( &((strct *)0)->memb ) )
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| 41 | /** Align a size_t value. */
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| 42 | #define KLDR_ALIGN_Z(val, align) ( ((val) + ((align) - 1)) & ~(size_t)((align) - 1) )
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| 43 | /** Align a void * value. */
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| 44 | #define KLDR_ALIGN_P(pv, align) ( (void *)( ((uintptr_t)(pv) + ((align) - 1)) & ~(uintptr_t)((align) - 1) ) )
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| 45 | /** Number of elements in an array. */
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| 46 | #define KLDR_ELEMENTS(a) ( sizeof(a) / sizeof((a)[0]) )
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| 47 |
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| 48 | /** @def KLDRHLP_LE2H_U16
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| 49 | * Unsigned 16-bit little-endian to host translation. */
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| 50 | /** @def KLDRHLP_LE2H_U32
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| 51 | * Unsigned 32-bit little-endian to host translation. */
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| 52 | #if 1
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| 53 | # define KLDRHLP_LE2H_U16(u16) ((uint16_t)(u16))
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| 54 | # define KLDRHLP_LE2H_U32(u32) ((uint32_t)(u32))
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| 55 | #else
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| 56 | # define KLDRHLP_LE2H_U16(u16) ( (uint16_t) (((u16) >> 8) | ((u16) << 8)) )
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| 57 | # define KLDRHLP_LE2H_U32(u32) ( ( ((u32) & UINT32_C(0xff000000)) >> 24 ) \
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| 58 | | ( ((u32) & UINT32_C(0x00ff0000)) >> 8 ) \
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| 59 | | ( ((u32) & UINT32_C(0x0000ff00)) << 8 ) \
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| 60 | | ( ((u32) & UINT32_C(0x000000ff)) << 24 ) \
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| 61 | )
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| 62 | #endif
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| 63 |
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| 64 | /*
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| 65 | * Compiler specific helpers.
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| 66 | * (I.e. operations that tend to have compiler intrinsic implementations).
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| 67 | */
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| 68 | #ifdef __GNUC__
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| 69 | /** memchr */
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| 70 | # define kLdrHlpMemChr(a,b,c) __builtin_memchr(a,b,c)
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| 71 | /** memcmp */
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| 72 | # define kLdrHlpMemComp(a,b,c) __builtin_memcmp(a,b,c)
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| 73 | /** memcpy */
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| 74 | # define kLdrHlpMemCopy(a,b,c) __builtin_memcpy(a,b,c)
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| 75 | /** memmove */
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| 76 | /*# define kLdrHlpMemMove(a,b,c) __builtin_memmove(a,b,c)*/
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| 77 | # define kLdrHlpMemMove_needed
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| 78 | /** memset */
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| 79 | # define kLdrHlpMemSet(a,b,c) __builtin_memset(a,b,c)
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| 80 | /** strchr */
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| 81 | # define kLdrHlpStrChr(a, b) __builtin_strchr(a, b)
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| 82 | /** strcmp */
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| 83 | # define kLdrHlpStrComp(a, b) __builtin_strcmp(a, b)
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| 84 | /** strlen */
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| 85 | # define kLdrHlpStrLen(a) __builtin_strlen(a)
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| 86 | /** alloca */
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| 87 | # define kLdrHlpAllocA(a) __builtin_alloca(a)
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| 88 | /** int3 */
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| 89 | # define kldrHlpBreakpoint() do { __asm__ __volatile__ ("int3\n\tnop"); } while (0)
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| 90 | /** NULL */
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| 91 | # ifndef NULL
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| 92 | # define NULL 0
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| 93 | # endif
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| 94 | #endif
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| 95 |
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| 96 | #ifdef _MSC_VER
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| 97 | # include <string.h>
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| 98 | # include <malloc.h>
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| 99 | # pragma intrinsic(memcmp, memcpy, memset, strcmp, strlen, __debugbreak)
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| 100 | /** memchr */
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| 101 | # define kLdrHlpMemChr_needed
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| 102 | /** memcmp */
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| 103 | # define kLdrHlpMemComp(a,b,c) memcmp(a,b,c)
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| 104 | /** memcpy */
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| 105 | # define kLdrHlpMemCopy(a,b,c) memcpy(a,b,c)
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| 106 | /** memmove */
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| 107 | # define kLdrHlpMemMove_needed
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| 108 | /** memset */
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| 109 | # define kLdrHlpMemSet(a,b,c) memset(a,b,c)
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| 110 | /** strcmp */
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| 111 | # define kLdrHlpStrComp(a, b) strcmp(a, b)
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| 112 | /** strlen */
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| 113 | # define kLdrHlpStrLen(a) strlen(a)
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| 114 | /** strchr */
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| 115 | # define kLdrHlpStrChr_needed
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| 116 | /** alloca */
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| 117 | # define kLdrHlpAllocA(a) alloca(a)
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| 118 | /** int3 */
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| 119 | # define kldrHlpBreakpoint() __debugbreak()
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| 120 | /** NULL */
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| 121 | # ifndef NULL
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| 122 | # define NULL 0
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| 123 | # endif
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| 124 | #endif
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| 125 |
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| 126 | #ifdef kLdrHlpStrChr_needed
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| 127 | char *kLdrHlpStrChr(const char *psz, int ch);
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| 128 | #endif
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| 129 | #ifdef kLdrHlpMemChr_needed
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| 130 | void *kLdrHlpMemChr(const void *pv, int ch, size_t cb);
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| 131 | #endif
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| 132 | #ifdef kLdrHlpMemMove_needed
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| 133 | void *kLdrHlpMemMove(void *pv1, const void *pv2, size_t cb);
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| 134 | #endif
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| 135 | int kLdrHlpMemIComp(const void *pv1, const void *pv2, size_t cb);
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| 136 | int kLdrHlpStrIComp(const char *pv1, const char *pv2);
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| 137 |
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| 138 |
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| 139 | #if (!defined(kLdrHlpMemChr) && !defined(kLdrHlpStrChr_needed))\
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| 140 | || !defined(kLdrHlpMemComp) \
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| 141 | || !defined(kLdrHlpMemCopy) \
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| 142 | || !defined(kLdrHlpMemSet) \
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| 143 | || (!defined(kLdrHlpStrChr) && !defined(kLdrHlpStrChr_needed)) \
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| 144 | || !defined(kLdrHlpStrLen) \
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| 145 | || !defined(kLdrHlpAllocA) \
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| 146 | || !defined(kldrHlpBreakpoint)
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| 147 | # error "Needs porting to your compiler."
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| 148 | #endif
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| 149 |
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| 150 | int kldrHlpSemInit(void);
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| 151 | void kldrHlpSemTerm(void);
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| 152 | int kldrHlpSemRequest(void);
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| 153 | void kldrHlpSemRelease(void);
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| 154 |
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| 155 | int kldrHlpPageAlloc(void **ppv, size_t cb, KLDRPROT enmProt, unsigned fFixed);
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| 156 | int kldrHlpPageProtect(void *pv, size_t cb, KLDRPROT enmProt);
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| 157 | int kldrHlpPageFree(void *pv, size_t cb);
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| 158 |
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| 159 | int kldrHlpHeapInit(void);
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| 160 | void kldrHlpHeapTerm(void);
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| 161 | void kldrHlpHeapDonate(void *pv, size_t cb);
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| 162 | void * kldrHlpAlloc(size_t cb);
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| 163 | void * kldrHlpAllocZ(size_t cb);
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| 164 | void kldrHlpFree(void *pv);
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| 165 |
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| 166 | int kldrHlpGetEnv(const char *pszVar, char *pszVal, size_t cchVal);
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| 167 | int kldrHlpGetEnvUZ(const char *pszVar, size_t *pcb);
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| 168 | char *kldrHlpGetFilename(const char *pszFilename);
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| 169 | char *kldrHlpGetSuff(const char *pszFilename);
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| 170 | char *kldrHlpGetExt(const char *pszFilename);
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| 171 | int kldrHlpIsFilenameOnly(const char *pszFilename);
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| 172 | void kldrHlpExit(int rc);
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| 173 | void kldrHlpSleep(unsigned cMillies);
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| 174 | char *kldrHlpInt2Ascii(char *psz, size_t cch, long lVal, unsigned iBase);
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| 175 | void kldrHlpAssertMsg(const char *pszExpr, const char *pszFile, unsigned iLine, const char *pszFunction);
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| 176 |
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| 177 | /** Assertion macro.
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| 178 | * Users should wrap it since this is ALWAYS compiled in. */
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| 179 | #define kldrHlpAssert(expr) \
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| 180 | do { \
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| 181 | if (!(expr)) \
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| 182 | { \
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| 183 | kldrHlpAssertMsg(#expr, __FILE__, __LINE__, __FUNCTION__); \
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| 184 | kldrHlpBreakpoint(); \
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| 185 | } \
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| 186 | } while (0)
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| 187 |
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| 188 |
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| 189 | /** @name Parameter validation macros
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| 190 | * @{ */
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| 191 |
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| 192 | /** Crash validation of a string argument. */
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| 193 | #define KLDRHLP_VALIDATE_STRING(str) \
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| 194 | do { kLdrHlpStrLen(str); } while (0)
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| 195 |
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| 196 | /** Crash validation of an optional string argument. */
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| 197 | #define KLDRHLP_VALIDATE_OPTIONAL_STRING(str) \
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| 198 | do { if (str) { KLDRHLP_VALIDATE_STRING(str); } } while (0)
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| 199 |
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| 200 | /** Return/Crash validation of an output buffer. */
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| 201 | #define KLDRHLP_VALIDATE_BUFFER(buf, cb) \
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| 202 | do { \
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| 203 | if ((cb)) \
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| 204 | { \
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| 205 | uint8_t __b; \
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| 206 | uint8_t volatile * __pb = (uint8_t volatile *)(buf); \
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| 207 | size_t __cbPage1 = 0x1000 - ((uintptr_t)(__pb) & 0xfff); /* ASSUMES page size! */ \
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| 208 | __b = *__pb; *__pb = 0xff; *__pb = __b; \
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| 209 | if ((cb) > __cbPage1) \
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| 210 | { \
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| 211 | size_t __cb = (cb) - __cbPage1; \
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| 212 | __pb -= __cbPage1; \
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| 213 | for (;;) \
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| 214 | { \
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| 215 | __b = *__pb; *__pb = 0xff; *__pb = __b; \
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| 216 | if (__cb < 0x1000) \
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| 217 | break; \
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| 218 | __pb += 0x1000; \
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| 219 | __cb -= 0x1000; \
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| 220 | } \
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| 221 | } \
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| 222 | } \
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| 223 | else \
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| 224 | return KLDR_ERR_INVALID_PARAMETER; \
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| 225 | } while (0)
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| 226 |
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| 227 | /** Crash validation of an optional output buffer. */
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| 228 | #define KLDRHLP_VALIDATE_OPTIONAL_BUFFER(buf, cb) \
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| 229 | do { \
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| 230 | if ((buf) != NULL && (cb) != 0) \
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| 231 | { \
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| 232 | KLDRHLP_VALIDATE_BUFFER(buf, cb); \
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| 233 | } \
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| 234 | } while (0)
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| 235 |
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| 236 | /** Return validation of an enum argument. */
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| 237 | #define KLDRHLP_VALIDATE_ENUM(arg, enumname) \
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| 238 | do { \
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| 239 | if ((arg) <= enumname##_INVALID || (arg) >= enumname##_END) \
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| 240 | { \
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| 241 | return KLDR_ERR_INVALID_PARAMETER; \
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| 242 | } \
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| 243 | } while (0)
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| 244 |
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| 245 | /** Return validation of a flags argument. */
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| 246 | #define KLDRHLP_VALIDATE_FLAGS(arg, AllowedMask) \
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| 247 | do { \
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| 248 | if ((arg) & ~(AllowedMask)) \
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| 249 | { \
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| 250 | return KLDR_ERR_INVALID_PARAMETER; \
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| 251 | } \
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| 252 | } while (0)
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| 253 |
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| 254 | /** @} */
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| 255 |
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| 256 |
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| 257 | /** @} */
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| 258 |
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| 259 | #endif /* __kLdrHlp_h__ */
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| 260 |
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