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MFP4: (part of) 110058

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Fix 32-bit msgsnd(3) and msgrcv(3) emulations for amd64.
This commit is contained in:
Jung-uk Kim 2006-12-20 19:36:03 +00:00
parent f61480ecf5
commit 127891cab9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165405
2 changed files with 58 additions and 6 deletions
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60
sys/compat/freebsd32/freebsd32_misc.c
View File

@ -1335,10 +1335,62 @@ freebsd32_semsys(struct thread *td, struct freebsd32_semsys_args *uap)
int
freebsd32_msgsys(struct thread *td, struct freebsd32_msgsys_args *uap)
{
/*
* Vector through to msgsys if it is loaded.
*/
return sysent[SYS_msgsys].sy_call(td, uap);
switch (uap->which) {
case 2:
return (freebsd32_msgsnd(td,
(struct freebsd32_msgsnd_args *)&uap->a2));
break;
case 3:
return (freebsd32_msgrcv(td,
(struct freebsd32_msgrcv_args *)&uap->a2));
break;
default:
/*
* Vector through to msgsys if it is loaded.
*/
return (sysent[SYS_msgsys].sy_call(td, uap));
break;
}
}
int
freebsd32_msgsnd(struct thread *td, struct freebsd32_msgsnd_args *uap)
{
const void *msgp;
long mtype;
int32_t mtype32;
int error;
if (!SYSCALL_MODULE_PRESENT(msgsnd))
return (nosys(td, (struct nosys_args *)uap));
msgp = PTRIN(uap->msgp);
if ((error = copyin(msgp, &mtype32, sizeof(mtype32))) != 0)
return (error);
mtype = mtype32;
return (kern_msgsnd(td, uap->msqid,
(const char *)msgp + sizeof(mtype32),
uap->msgsz, uap->msgflg, mtype));
}
int
freebsd32_msgrcv(struct thread *td, struct freebsd32_msgrcv_args *uap)
{
void *msgp;
long mtype;
int32_t mtype32;
int error;
if (!SYSCALL_MODULE_PRESENT(msgrcv))
return (nosys(td, (struct nosys_args *)uap));
msgp = PTRIN(uap->msgp);
if ((error = kern_msgrcv(td, uap->msqid,
(char *)msgp + sizeof(mtype32), uap->msgsz,
uap->msgtyp, uap->msgflg, &mtype)) != 0)
return (error);
mtype32 = (int32_t)mtype;
return (copyout(&mtype32, msgp, sizeof(mtype32)));
}
int

4
sys/compat/freebsd32/syscalls.master
View File

@ -406,9 +406,9 @@
224 AUE_MSGCTL NOPROTO { int msgctl(int msqid, int cmd, \
struct msqid_ds *buf); }
225 AUE_MSGGET NOPROTO { int msgget(key_t key, int msgflg); }
226 AUE_MSGSND NOPROTO { int msgsnd(int msqid, void *msgp, \
226 AUE_MSGSND STD { int freebsd32_msgsnd(int msqid, void *msgp, \
size_t msgsz, int msgflg); }
227 AUE_MSGRCV NOPROTO { int msgrcv(int msqid, void *msgp, \
227 AUE_MSGRCV STD { int freebsd32_msgrcv(int msqid, void *msgp, \
size_t msgsz, long msgtyp, int msgflg); }
228 AUE_SHMAT NOPROTO { int shmat(int shmid, void *shmaddr, \
int shmflg); }