libc/sysdeps/linux/or1k/sbrk.c

   1 /* From libc-5.3.12 */
   2
   3 #include <errno.h>
   4 #include <unistd.h>
   5 #include <sys/syscall.h>
   6 libc_hidden_proto(sbrk)
   7
   8 extern void * ___brk_addr;
   9
  10 extern int __init_brk (void);
  11 extern void *_brk(void *ptr);
  12
  13 void *
  14 sbrk(intptr_t increment)
  15 {
  16     if (__init_brk () == 0)
  17     {
  18                 char * tmp = (char*)___brk_addr+increment;
  19                 ___brk_addr = _brk(tmp);
  20                 if (___brk_addr == tmp)
  21                         return tmp-increment;
  22                 __set_errno(ENOMEM);
  23                 return ((void *) -1);
  24     }
  25     return ((void *) -1);
  26 }
  27 libc_hidden_def(sbrk)