memdisk/memdisk.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2001-2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 /*
  14  * memdisk.h
  15  *
  16  * Miscellaneous header definitions
  17  */
  18
  19 #ifndef MEMDISK_H
  20 #define MEMDISK_H
  21
  22 /* We use the com32 interface for calling 16-bit code */
  23 #include <com32.h>
  24
  25 /* The real-mode segment */
  26 #define LOW_SEG 0x0800
  27
  28 #define __cdecl __attribute__((cdecl,regparm(0)))
  29
  30 typedef void (*syscall_t)(uint8_t, com32sys_t *, com32sys_t *);
  31 extern __cdecl syscall_t syscall;
  32 extern void *sys_bounce;
  33
  34 /* What to call when we're dead */
  35 extern void __attribute__((noreturn)) die(void);
  36
  37 /* Standard routines */
  38 #define memcpy(a,b,c) __builtin_memcpy(a,b,c)
  39 #define memset(a,b,c) __builtin_memset(a,b,c)
  40 #define strcpy(a,b)   __builtin_strcpy(a,b)
  41 #define strlen(a)     __builtin_strlen(a)
  42
  43 /* memcpy() but returns a pointer to end of buffer */
  44 static inline void *
  45 memcpy_endptr(void *__d, const void *__s, unsigned int __n)
  46 {
  47   memcpy(__d, __s, __n);
  48   return (void *)((char *)__d + __n);
  49 }
  50
  51 /* memcmp() */
  52 static inline int
  53 memcmp(const void *__a, const void *__b, unsigned int __n)
  54 {
  55   const unsigned char *__aa = __a;
  56   const unsigned char *__bb = __b;
  57   int __d;
  58
  59   while ( __n-- ) {
  60     __d = *__bb++ - *__aa++;
  61     if ( __d )
  62       return __d;
  63   }
  64
  65   return 0;
  66 }
  67
  68 /* Decompression */
  69 extern int check_zip(void *indata, uint32_t size, uint32_t *zbytes_p,
  70                      uint32_t *dbytes_p, uint32_t *orig_crc,
  71                      uint32_t *offset_p);
  72 extern void *unzip(void *indata, uint32_t zbytes, uint32_t dbytes,
  73                    uint32_t orig_crc, void *target);
  74
  75 #endif