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IPC message translation. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2930 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-06-03 14:27:49 +00:00
parent 3eb6b04433
commit 1bc012f65a
1 changed files with 123 additions and 12 deletions
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135
linux-user/syscall.c
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@ -1437,6 +1437,117 @@ static inline long do_semctl(long first, long second, long third, long ptr)
return ret;
}
struct target_msqid_ds
{
struct target_ipc_perm msg_perm;
target_ulong msg_stime;
target_ulong __unused1;
target_ulong msg_rtime;
target_ulong __unused2;
target_ulong msg_ctime;
target_ulong __unused3;
target_ulong __msg_cbytes;
target_ulong msg_qnum;
target_ulong msg_qbytes;
target_ulong msg_lspid;
target_ulong msg_lrpid;
target_ulong __unused4;
target_ulong __unused5;
};
static inline void target_to_host_msqid_ds(struct msqid_ds *host_md,
target_ulong target_addr)
{
struct target_msqid_ds *target_md;
lock_user_struct(target_md, target_addr, 1);
target_to_host_ipc_perm(&(host_md->msg_perm),target_addr);
host_md->msg_stime = tswapl(target_md->msg_stime);
host_md->msg_rtime = tswapl(target_md->msg_rtime);
host_md->msg_ctime = tswapl(target_md->msg_ctime);
host_md->__msg_cbytes = tswapl(target_md->__msg_cbytes);
host_md->msg_qnum = tswapl(target_md->msg_qnum);
host_md->msg_qbytes = tswapl(target_md->msg_qbytes);
host_md->msg_lspid = tswapl(target_md->msg_lspid);
host_md->msg_lrpid = tswapl(target_md->msg_lrpid);
unlock_user_struct(target_md, target_addr, 0);
}
static inline void host_to_target_msqid_ds(target_ulong target_addr,
struct msqid_ds *host_md)
{
struct target_msqid_ds *target_md;
lock_user_struct(target_md, target_addr, 0);
host_to_target_ipc_perm(target_addr,&(host_md->msg_perm));
target_md->msg_stime = tswapl(host_md->msg_stime);
target_md->msg_rtime = tswapl(host_md->msg_rtime);
target_md->msg_ctime = tswapl(host_md->msg_ctime);
target_md->__msg_cbytes = tswapl(host_md->__msg_cbytes);
target_md->msg_qnum = tswapl(host_md->msg_qnum);
target_md->msg_qbytes = tswapl(host_md->msg_qbytes);
target_md->msg_lspid = tswapl(host_md->msg_lspid);
target_md->msg_lrpid = tswapl(host_md->msg_lrpid);
unlock_user_struct(target_md, target_addr, 1);
}
static inline long do_msgctl(long first, long second, long ptr)
{
struct msqid_ds dsarg;
int cmd = second&0xff;
long ret = 0;
switch( cmd ) {
case IPC_STAT:
case IPC_SET:
target_to_host_msqid_ds(&dsarg,ptr);
ret = get_errno(msgctl(first, cmd, &dsarg));
host_to_target_msqid_ds(ptr,&dsarg);
default:
ret = get_errno(msgctl(first, cmd, &dsarg));
}
return ret;
}
struct target_msgbuf {
target_ulong mtype;
char mtext[1];
};
static inline long do_msgsnd(long msqid, long msgp, long msgsz, long msgflg)
{
struct target_msgbuf *target_mb;
struct msgbuf *host_mb;
long ret = 0;
lock_user_struct(target_mb,msgp,0);
host_mb = malloc(msgsz+sizeof(long));
host_mb->mtype = tswapl(target_mb->mtype);
memcpy(host_mb->mtext,target_mb->mtext,msgsz);
ret = get_errno(msgsnd(msqid, host_mb, msgsz, msgflg));
free(host_mb);
unlock_user_struct(target_mb, msgp, 0);
return ret;
}
static inline long do_msgrcv(long msqid, long msgp, long msgsz, long msgtype, long msgflg)
{
struct target_msgbuf *target_mb;
struct msgbuf *host_mb;
long ret = 0;
lock_user_struct(target_mb, msgp, 0);
host_mb = malloc(msgsz+sizeof(long));
ret = get_errno(msgrcv(msqid, host_mb, msgsz, 1, msgflg));
if (ret > 0)
memcpy(target_mb->mtext, host_mb->mtext, ret);
target_mb->mtype = tswapl(host_mb->mtype);
free(host_mb);
unlock_user_struct(target_mb, msgp, 0);
return ret;
}
/* ??? This only works with linear mappings. */
static long do_ipc(long call, long first, long second, long third,
long ptr, long fifth)
@ -1473,27 +1584,27 @@ static long do_ipc(long call, long first, long second, long third,
break;
case IPCOP_msgsnd:
ret = get_errno(msgsnd(first, (struct msgbuf *) ptr, second, third));
ret = do_msgsnd(first, ptr, second, third);
break;
case IPCOP_msgctl:
ret = get_errno(msgctl(first, second, (struct msqid_ds *) ptr));
ret = do_msgctl(first, second, ptr);
break;
case IPCOP_msgrcv:
{
struct ipc_kludge
{
void *__unbounded msgp;
long int msgtyp;
};
{
struct ipc_kludge
{
void *__unbounded msgp;
long int msgtyp;
};
struct ipc_kludge *foo = (struct ipc_kludge *) ptr;
struct msgbuf *msgp = (struct msgbuf *) foo->msgp;
struct ipc_kludge *foo = (struct ipc_kludge *) ptr;
struct msgbuf *msgp = (struct msgbuf *) foo->msgp;
ret = get_errno(msgrcv(first, msgp, second, 0, third));
ret = do_msgrcv(first, (long)msgp, second, 0, third);
}
}
break;
case IPCOP_shmat: