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Change kse_switchin to accept kse_thr_mailbox pointer, the syscall

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will be used heavily in debugging KSE threads. This breaks libpthread
on IA64, but because libpthread was not in 5.2.1 release, I would like
to change it so we needn't to introduce another syscall.
This commit is contained in:
davidxu 2004-07-12 07:39:20 +00:00
parent ba689b4043
commit 351df4e348
4 changed files with 28 additions and 15 deletions
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29
sys/kern/kern_kse.c
View File

@ -126,25 +126,36 @@ upcall_remove(struct thread *td)
#ifndef _SYS_SYSPROTO_H_
struct kse_switchin_args {
const struct __mcontext *mcp;
long val;
long *loc;
struct kse_thr_mailbox *tmbx;
int flags;
};
#endif
int
kse_switchin(struct thread *td, struct kse_switchin_args *uap)
{
mcontext_t mc;
struct kse_thr_mailbox tmbx;
struct kse_upcall *ku;
int error;
error = (uap->mcp == NULL) ? EINVAL : 0;
if ((ku = td->td_upcall) == NULL || TD_CAN_UNBIND(td))
return (EINVAL);
error = (uap->tmbx == NULL) ? EINVAL : 0;
if (!error)
error = copyin(uap->mcp, &mc, sizeof(mc));
if (!error && uap->loc != NULL)
error = (suword(uap->loc, uap->val) != 0) ? EINVAL : 0;
error = copyin(uap->tmbx, &tmbx, sizeof(tmbx));
if (!error && (uap->flags & KSE_SWITCHIN_SETTMBX))
error = (suword(&ku->ku_mailbox->km_curthread,
(long)uap->tmbx) != 0 ? EINVAL : 0);
if (!error)
error = set_mcontext(td, &mc);
error = set_mcontext(td, &tmbx.tm_context.uc_mcontext);
if (!error) {
if (uap->flags & KSE_SWITCHIN_SETTMBX) {
td->td_mailbox = uap->tmbx;
mtx_lock_spin(&sched_lock);
td->td_flags |= TDF_CAN_UNBIND;
mtx_unlock_spin(&sched_lock);
}
}
return ((error == 0) ? EJUSTRETURN : error);
}

4
sys/kern/syscalls.master
View File

@ -626,8 +626,8 @@
int attrnamespace, void *data, size_t nbytes); }
439 STD { ssize_t extattr_list_link(const char *path, \
int attrnamespace, void *data, size_t nbytes); }
440 MSTD { int kse_switchin(const struct __mcontext *mcp, \
long val, long *loc); }
440 MSTD { int kse_switchin(struct kse_thr_mailbox *tmbx, \
int flags); }
441 MNOSTD { int ksem_timedwait(semid_t id, struct timespec *abstime); }
442 MSTD { int thr_suspend(const struct timespec *timeout); }
443 MSTD { int thr_wake(long id); }

5
sys/sys/kse.h
View File

@ -96,6 +96,9 @@ struct kse_mailbox {
/* These flags are kept in tm_flags */
#define TMF_NOUPCALL 0x01
/* Flags for kse_switchin */
#define KSE_SWITCHIN_SETTMBX 0x01
/* Commands for kse_thr_interrupt */
#define KSE_INTR_INTERRUPT 0x01
#define KSE_INTR_RESTART 0x02
@ -108,7 +111,7 @@ int kse_exit(void);
int kse_release(struct timespec *);
int kse_thr_interrupt(struct kse_thr_mailbox *, int, long);
int kse_wakeup(struct kse_mailbox *);
int kse_switchin(mcontext_t *, long, long *);
int kse_switchin(struct kse_thr_mailbox *, int flags);
#endif /* !_KERNEL */
#endif /* !_SYS_KSE_H_ */

5
sys/sys/sysproto.h
View File

@ -1289,9 +1289,8 @@ struct extattr_list_link_args {
char nbytes_l_[PADL_(size_t)]; size_t nbytes; char nbytes_r_[PADR_(size_t)];
};
struct kse_switchin_args {
char mcp_l_[PADL_(const struct __mcontext *)]; const struct __mcontext * mcp; char mcp_r_[PADR_(const struct __mcontext *)];
char val_l_[PADL_(long)]; long val; char val_r_[PADR_(long)];
char loc_l_[PADL_(long *)]; long * loc; char loc_r_[PADR_(long *)];
char tmbx_l_[PADL_(struct kse_thr_mailbox *)]; struct kse_thr_mailbox * tmbx; char tmbx_r_[PADR_(struct kse_thr_mailbox *)];
char flags_l_[PADL_(int)]; int flags; char flags_r_[PADR_(int)];
};
struct ksem_timedwait_args {
char id_l_[PADL_(semid_t)]; semid_t id; char id_r_[PADR_(semid_t)];