libc-top-half/musl/src/ipc/shmat.c

   1 #include <sys/shm.h>
   2 #include "syscall.h"
   3 #include "ipc.h"
   4
   5 #ifdef SYS_shmat
   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