arch/all-pc/bootstrap/memory_io.c

   1 #include <elfloader.h>
   2 #include <string.h>
   3
   4 void *open_file(struct ELFNode *n, unsigned int *err)
   5 {
   6     /*
   7      * Our files are already loaded into memory as raw data.
   8      * Return a pointer to the beginning of the file.
   9      * NULL pointer is a valid result here (on EFI machines the first
  10      * module can be located at address 0). This is why error code
  11      * is a separate value here.
  12      */
  13     *err = 0;
  14     return n->eh;
  15 }
  16
  17 void close_file(void *file)
  18 {
  19     /* No special action is needed */
  20 }
  21
  22 int read_block(void *file, unsigned long offset, void *dest, unsigned long length)
  23 {
  24     memcpy(dest, file + offset, length);
  25     return 0;
  26 }
  27
  28 void *load_block(void *file, unsigned long offset, unsigned long length, unsigned int *err)
  29 {
  30     *err = 0;
  31     return file + offset;
  32 }
  33
  34 void free_block(void *addr)
  35 {
  36     /* No special action is needed */
  37 }