syscalls/read.c

   1 /*
   2  * SYSCALL_DEFINE3(read, unsigned int, fd, char __user *, buf, size_t, count)
   3  */
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include "maps.h"
   7 #include "sanitise.h"
   8 #include "shm.h"
   9 #include "arch.h"
  10
  11 static void sanitise_read(int childno)
  12 {
  13         shm->a2[childno] = (unsigned long) get_non_null_address();
  14         shm->a3[childno] = rand() % page_size;
  15 }
  16
  17 struct syscallentry syscall_read = {
  18         .name = "read",
  19         .num_args = 3,
  20         .sanitise = sanitise_read,
  21         .arg1name = "fd",
  22         .arg1type = ARG_FD,
  23         .arg2name = "buf",
  24         .arg2type = ARG_ADDRESS,
  25         .arg3name = "count",
  26         .arg3type = ARG_LEN,
  27         .flags = NEED_ALARM,
  28 };