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001 /* Copyright (C) 2005 David Decotigny 001 /* Copyright (C) 2005 David Decotigny 002 002 003 This program is free software; you can redi 003 This program is free software; you can redistribute it and/or 004 modify it under the terms of the GNU Genera 004 modify it under the terms of the GNU General Public License 005 as published by the Free Software Foundatio 005 as published by the Free Software Foundation; either version 2 006 of the License, or (at your option) any lat 006 of the License, or (at your option) any later version. 007 007 008 This program is distributed in the hope tha 008 This program is distributed in the hope that it will be useful, 009 but WITHOUT ANY WARRANTY; without even the 009 but WITHOUT ANY WARRANTY; without even the implied warranty of 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR 010 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 011 GNU General Public License for more details 011 GNU General Public License for more details. 012 012 013 You should have received a copy of the GNU 013 You should have received a copy of the GNU General Public License 014 along with this program; if not, write to t 014 along with this program; if not, write to the Free Software 015 Foundation, Inc., 59 Temple Place - Suite 3 015 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 016 USA. 016 USA. 017 */ 017 */ >> 018 >> 019 #include "crt.h" >> 020 #include "libc.h" >> 021 #include "stdarg.h" >> 022 >> 023 >> 024 void * fakemmap(void *start, size_t length, int prot , int flags, >> 025 const char *path, loff_t offset) >> 026 { >> 027 /* At kernel side, offset is considered positive */ >> 028 if (offset < 0) >> 029 return NULL; >> 030 >> 031 if (0 != _sos_fakemmap(& start, length, prot, flags, path, offset)) >> 032 return NULL; >> 033 >> 034 return start; >> 035 } >> 036 >> 037 >> 038 void * mremap(void * old_addr, size_t old_len, >> 039 size_t new_len, >> 040 unsigned long flags) >> 041 { >> 042 void * new_uaddr = old_addr; >> 043 if (0 != _sos_mresize(old_addr, old_len, & new_uaddr, new_len, flags)) >> 044 return NULL; >> 045 >> 046 return new_uaddr; >> 047 } >> 048 >> 049 >> 050 /** >> 051 * The presence of this global variable without any protected access >> 052 * to it explains why the "brk/sbrk" functions below are MT-unsafe ! >> 053 */ >> 054 static void * kernel_heap_top = NULL; >> 055 int brk(void *end_data_seg) >> 056 { >> 057 if (! end_data_seg) >> 058 return -1; >> 059 >> 060 kernel_heap_top = _sos_brk(end_data_seg); >> 061 return 0; >> 062 } >> 063 >> 064 >> 065 void *sbrk(ptrdiff_t increment) >> 066 { >> 067 if (! kernel_heap_top) >> 068 kernel_heap_top = _sos_brk(0); >> 069 >> 070 kernel_heap_top = _sos_brk(kernel_heap_top + increment); >> 071 return kernel_heap_top; >> 072 } >> 073 >> 074 >> 075 void * calloc (size_t nmemb, size_t size) >> 076 { >> 077 return malloc(nmemb * size); >> 078 } >> 079 >> 080 >> 081 /** >> 082 * The presence of this global variable without any protected access >> 083 * to it explains why the "malloc/calloc" functions below are >> 084 * MT-unsafe ! >> 085 */ >> 086 static void * malloc_heap_top = NULL; >> 087 void * malloc (size_t size) >> 088 { >> 089 void * retval; >> 090 >> 091 if (size <= 0) >> 092 return NULL; >> 093 >> 094 /* Align on a 4B boundary */ >> 095 size = ((size-1) & ~3) + 4; >> 096 >> 097 if (! kernel_heap_top) >> 098 kernel_heap_top = _sos_brk(0); >> 099 >> 100 if (! malloc_heap_top) >> 101 malloc_heap_top = kernel_heap_top; >> 102 >> 103 retval = malloc_heap_top; >> 104 malloc_heap_top += size; >> 105 >> 106 _sos_brk(malloc_heap_top); >> 107 return retval; >> 108 } >> 109 >> 110 >> 111 void free(void *ptr) >> 112 { >> 113 // bochs_printf("Free ignored (not implemented yet)\n"); >> 114 } >> 115 >> 116 >> 117 int open(const char *pathname, int flags, /* mode_t mode */...) >> 118 { >> 119 va_list ap; >> 120 unsigned int mode = 0; >> 121 >> 122 va_start(ap, flags); >> 123 if (flags & O_CREAT) >> 124 mode = va_arg(ap, unsigned int); >> 125 va_end(ap); >> 126 >> 127 return _sos_open(pathname, flags, mode); >> 128 } >> 129 >> 130 >> 131 int read(int fd, char * buf, size_t len) >> 132 { >> 133 int retval = _sos_read(fd, buf, & len); >> 134 if (retval < 0) >> 135 return retval; >> 136 return len; >> 137 } >> 138 >> 139 >> 140 int write(int fd, const char * buf, size_t len) >> 141 { >> 142 int retval = _sos_write(fd, buf, & len); >> 143 if (retval < 0) >> 144 return retval; >> 145 return len; >> 146 } >> 147 >> 148 >> 149 off_t lseek(int fd, off_t offset, int whence) >> 150 { >> 151 loff_t result = offset; >> 152 int retval = _sos_seek64(fd, & result, whence); >> 153 if (retval < 0) >> 154 return retval; >> 155 return result; >> 156 } >> 157 >> 158 >> 159 loff_t lseek64(int fd, loff_t offset, int whence) >> 160 { >> 161 loff_t result = offset; >> 162 int retval = _sos_seek64(fd, & result, whence); >> 163 if (retval < 0) >> 164 return retval; >> 165 return result; >> 166 } >> 167 >> 168 >> 169 void * mmap(void *start, size_t length, int prot , int flags, >> 170 int fd, loff_t offset) >> 171 { >> 172 /* At kernel side, offset is considered positive */ >> 173 if (offset < 0) >> 174 return NULL; >> 175 >> 176 if (0 != _sos_fmmap(& start, length, prot, flags, fd, offset)) >> 177 return NULL; >> 178 >> 179 return start; >> 180 } >> 181 >> 182 >> 183 int ftruncate(int fd, off_t length) >> 184 { >> 185 return _sos_ftruncate64(fd, length); >> 186 } >> 187 >> 188 >> 189 struct sos_DIR_struct >> 190 { >> 191 int fd; >> 192 struct dirent dirent; >> 193 }; >> 194 >> 195 >> 196 DIR *opendir(const char *name) >> 197 { >> 198 DIR * result = malloc(sizeof(DIR)); >> 199 if (! result) >> 200 return NULL; >> 201 >> 202 result->fd = _sos_open(name, O_DIRECTORY | O_RDONLY, 0); >> 203 return result; >> 204 } >> 205 >> 206 >> 207 int dirfd(const DIR * dir) >> 208 { >> 209 if (dir) >> 210 return dir->fd; >> 211 return -1; >> 212 } >> 213 >> 214 >> 215 struct dirent *readdir(DIR *dir) >> 216 { >> 217 int retval = _sos_readdir(dir->fd, & dir->dirent); >> 218 if (retval < 0) >> 219 return NULL; >> 220 return & dir->dirent; >> 221 } >> 222 >> 223 >> 224 int closedir(DIR *dir) >> 225 { >> 226 close(dir->fd); >> 227 free(dir); >> 228 return 0; >> 229 } >> 230 >> 231 >> 232 int stat(const char *file_name, struct stat *buf) >> 233 { >> 234 return _sos_stat(file_name, TRUE, buf); >> 235 } >> 236 >> 237 >> 238 int lstat(const char *file_name, struct stat *buf) >> 239 { >> 240 return _sos_stat(file_name, FALSE, buf); >> 241 }
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