shmat.c raw

   1  #include <sys/shm.h>
   2  #include "syscall.h"
   3  #include "ipc.h"
   4  
   5  #ifndef SYS_ipc
   6  void *shmat(int id, const void *addr, int flag)
   7  {
   8  	return (void *)syscall(SYS_shmat, id, addr, flag);
   9  }
  10  #else
  11  void *shmat(int id, const void *addr, int flag)
  12  {
  13  	unsigned long ret;
  14  	ret = syscall(SYS_ipc, IPCOP_shmat, id, flag, &addr, addr);
  15  	return (ret > -(unsigned long)SHMLBA) ? (void *)ret : (void *)addr;
  16  }
  17  #endif
  18