src/helper/replacements.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program 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  *   This program 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 this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifndef REPLACEMENTS_H
  27 #define REPLACEMENTS_H
  28
  29 /* MIN,MAX macros */
  30 #ifndef MIN
  31 #define MIN(a,b) (((a) < (b))?(a):(b))
  32 #endif
  33 #ifndef MAX
  34 #define MAX(a,b) (((a) > (b))?(a):(b))
  35 #endif
  36
  37 /* for systems that do not support ENOTSUP
  38  * win32 being one of them */
  39 #ifndef ENOTSUP
  40 #define ENOTSUP 134             /* Not supported */
  41 #endif
  42
  43 /* for systems that do not support O_BINARY
  44  * linux being one of them */
  45 #ifndef O_BINARY
  46 #define O_BINARY 0
  47 #endif
  48
  49 #ifndef HAVE_SYS_TIME_H
  50
  51 #ifndef _TIMEVAL_DEFINED
  52 #define _TIMEVAL_DEFINED
  53
  54 struct timeval {
  55         long tv_sec;
  56         long tv_usec;
  57 };
  58
  59 #endif /* _TIMEVAL_DEFINED */
  60
  61 #endif
  62
  63 /* gettimeofday() */
  64 #ifndef HAVE_GETTIMEOFDAY
  65
  66 #ifdef _WIN32
  67 struct timezone {
  68         int tz_minuteswest;
  69         int tz_dsttime;
  70 };
  71 #endif
  72 struct timezone;
  73
  74 int gettimeofday(struct timeval *tv, struct timezone *tz);
  75
  76 #endif
  77
  78 #ifndef IN_REPLACEMENTS_C
  79 /**** clear_malloc & fill_malloc ****/
  80 void *clear_malloc(size_t size);
  81 void *fill_malloc(size_t size);
  82 #endif
  83
  84 /*
  85  * Now you have 3 ways for the malloc function:
  86  *
  87  * 1. Do not change anything, use the original malloc
  88  *
  89  * 2. Use the clear_malloc function instead of the original malloc.
  90  *    In this case you must use the following define:
  91  *    #define malloc((_a)) clear_malloc((_a))
  92  *
  93  * 3. Use the fill_malloc function instead of the original malloc.
  94  *    In this case you must use the following define:
  95  *    #define malloc((_a)) fill_malloc((_a))
  96  *
  97  * We have figured out that there could exist some malloc problems
  98  * where variables are using without to be initialise. To find this
  99  * places, use the fill_malloc function. With this function we want
 100  * to initialize memory to some known bad state. This is quite easily
 101  * spotted in the debugger and will trap to an invalid address.
 102  *
 103  * clear_malloc can be used if you want to set not initialise
 104  * variable to 0.
 105  *
 106  * If you do not want to change the malloc function, to not use one of
 107  * the following macros. Which is the default way.
 108  */
 109
 110 /* #define malloc(_a) clear_malloc(_a) */
 111 /* #define malloc(_a) fill_malloc(_a) */
 112
 113 /* GNU extensions to the C library that may be missing on some systems */
 114 #ifndef HAVE_STRNDUP
 115 char* strndup(const char *s, size_t n);
 116 #endif /* HAVE_STRNDUP */
 117
 118 #ifndef HAVE_STRNLEN
 119 size_t strnlen(const char *s, size_t maxlen);
 120 #endif /* HAVE_STRNLEN */
 121
 122 #ifndef HAVE_USLEEP
 123 #ifdef _WIN32
 124 static __inline unsigned usleep(unsigned int usecs)
 125 {
 126         Sleep((usecs/1000));
 127         return 0;
 128 }
 129 #else
 130 #if BUILD_ECOSBOARD
 131 void usleep(int us);
 132 #else
 133 #error no usleep defined for your platform
 134 #endif
 135 #endif
 136 #endif /* HAVE_USLEEP */
 137
 138 /* Windows specific */
 139 #ifdef _WIN32
 140
 141 #define WIN32_LEAN_AND_MEAN
 142 #include <windows.h>
 143 #include <time.h>
 144
 145 /* win32 systems do not support ETIMEDOUT */
 146
 147 #ifndef ETIMEDOUT
 148 #define ETIMEDOUT WSAETIMEDOUT
 149 #endif
 150
 151 #if IS_MINGW == 1
 152 static __inline unsigned char inb(unsigned short int port)
 153 {
 154         unsigned char _v;
 155         __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
 156         return _v;
 157 }
 158
 159 static __inline void outb(unsigned char value, unsigned short int port)
 160 {
 161         __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
 162 }
 163
 164 /* mingw does not have ffs, so use gcc builtin types */
 165 #define ffs __builtin_ffs
 166
 167 #endif /* IS_MINGW */
 168
 169 int win_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv);
 170
 171 #endif  /* _WIN32 */
 172
 173 /* generic socket functions for Windows and Posix */
 174 static __inline int write_socket(int handle, const void *buffer, unsigned int count)
 175 {
 176 #ifdef _WIN32
 177         return send(handle, buffer, count, 0);
 178 #else
 179         return write(handle, buffer, count);
 180 #endif
 181 }
 182
 183 static __inline int read_socket(int handle, void *buffer, unsigned int count)
 184 {
 185 #ifdef _WIN32
 186         return recv(handle, buffer, count, 0);
 187 #else
 188         return read(handle, buffer, count);
 189 #endif
 190 }
 191
 192 static __inline int close_socket(int sock)
 193 {
 194 #ifdef _WIN32
 195         return closesocket(sock);
 196 #else
 197         return close(sock);
 198 #endif
 199 }
 200
 201 static __inline void socket_nonblock(int fd)
 202 {
 203 #ifdef _WIN32
 204         unsigned long nonblock = 1;
 205         ioctlsocket(fd, FIONBIO, &nonblock);
 206 #else
 207         int oldopts = fcntl(fd, F_GETFL, 0);
 208         fcntl(fd, F_SETFL, oldopts | O_NONBLOCK);
 209 #endif
 210 }
 211
 212 static __inline int socket_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
 213 {
 214 #ifdef _WIN32
 215         return win_select(max_fd, rfds, wfds, efds, tv);
 216 #else
 217         return select(max_fd, rfds, wfds, efds, tv);
 218 #endif
 219 }
 220
 221 #ifndef HAVE_ELF_H
 222
 223 #include <helper/types.h>
 224
 225 typedef uint32_t        Elf32_Addr;
 226 typedef uint16_t        Elf32_Half;
 227 typedef uint32_t        Elf32_Off;
 228 typedef int32_t         Elf32_Sword;
 229 typedef uint32_t        Elf32_Word;
 230 typedef uint32_t        Elf32_Size;
 231 typedef Elf32_Off       Elf32_Hashelt;
 232
 233 typedef struct
 234 {
 235         unsigned char   e_ident[16];    /* Magic number and other info */
 236         Elf32_Half      e_type;                 /* Object file type */
 237         Elf32_Half      e_machine;              /* Architecture */
 238         Elf32_Word      e_version;              /* Object file version */
 239         Elf32_Addr      e_entry;                /* Entry point virtual address */
 240         Elf32_Off       e_phoff;                /* Program header table file offset */
 241         Elf32_Off       e_shoff;                /* Section header table file offset */
 242         Elf32_Word      e_flags;                /* Processor-specific flags */
 243         Elf32_Half      e_ehsize;               /* ELF header size in bytes */
 244         Elf32_Half      e_phentsize;    /* Program header table entry size */
 245         Elf32_Half      e_phnum;                /* Program header table entry count */
 246         Elf32_Half      e_shentsize;    /* Section header table entry size */
 247         Elf32_Half      e_shnum;                /* Section header table entry count */
 248         Elf32_Half      e_shstrndx;             /* Section header string table index */
 249 } Elf32_Ehdr;
 250
 251 #define ELFMAG          "\177ELF"
 252 #define SELFMAG         4
 253
 254 #define EI_CLASS        4               /* File class byte index */
 255 #define ELFCLASS32      1               /* 32-bit objects */
 256 #define ELFCLASS64      2               /* 64-bit objects */
 257
 258 #define EI_DATA         5               /* Data encoding byte index */
 259 #define ELFDATA2LSB     1               /* 2's complement, little endian */
 260 #define ELFDATA2MSB     2               /* 2's complement, big endian */
 261
 262 typedef struct
 263 {
 264         Elf32_Word p_type;              /* Segment type */
 265         Elf32_Off p_offset;             /* Segment file offset */
 266         Elf32_Addr p_vaddr;             /* Segment virtual address */
 267         Elf32_Addr p_paddr;             /* Segment physical address */
 268         Elf32_Size p_filesz;    /* Segment size in file */
 269         Elf32_Size p_memsz;             /* Segment size in memory */
 270         Elf32_Word p_flags;             /* Segment flags */
 271         Elf32_Size p_align;             /* Segment alignment */
 272 } Elf32_Phdr;
 273
 274 #define PT_LOAD         1               /* Loadable program segment */
 275
 276 #endif /* HAVE_ELF_H */
 277
 278 #endif /* REPLACEMENTS_H */