diff options
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/syscall.c | 135 |
1 files changed, 123 insertions, 12 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 5d6bf8e946..e380bc763b 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -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: |