github.com/afumu/libc@v0.0.6/musl/src/ipc/shmat.c (about)

     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