Date: Thu, 27 Nov 2003 15:04:34 -0800 (PST) From: Marcel Moolenaar <marcel@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 43101 for review Message-ID: <200311272304.hARN4YTQ050408@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=43101 Change 43101 by marcel@marcel_nfs on 2003/11/27 15:04:26 Add a new syscall kse_switchin(2) that can be used to switch contexts on platforms that need or benefit from kernel support for KSE. Affected files ... .. //depot/projects/ia64/sys/kern/kern_thread.c#69 edit .. //depot/projects/ia64/sys/kern/syscalls.master#34 edit .. //depot/projects/ia64/sys/sys/kse.h#15 edit Differences ... ==== //depot/projects/ia64/sys/kern/kern_thread.c#69 (text+ko) ==== @@ -384,6 +384,30 @@ thread_link(td, kg); } +#ifndef _SYS_SYSPROTO_H_ +struct kse_switchin_args { + const struct __mcontext *mcp; + long val; + long *loc; +}; +#endif + +int +kse_switchin(struct thread *td, struct kse_switchin_args *uap) +{ + mcontext_t mc; + int error; + + error = (uap->mcp == NULL) ? EINVAL : 0; + if (!error) + error = copyin(uap->mcp, &mc, sizeof(mc)); + if (!error) + error = set_mcontext(td, &mc); + if (!error && uap->loc != NULL) + suword(uap->loc, uap->val); + return ((error == 0) ? EJUSTRETURN : error); +} + /* struct kse_thr_interrupt_args { struct kse_thr_mailbox * tmbx; ==== //depot/projects/ia64/sys/kern/syscalls.master#34 (text+ko) ==== @@ -639,6 +639,8 @@ int attrnamespace, void *data, size_t nbytes); } 439 STD BSD { ssize_t extattr_list_link(const char *path, \ int attrnamespace, void *data, size_t nbytes); } +440 MSTD BSD { int kse_switchin(const struct __mcontext *mcp, \ + long val, long *loc); } ; Please copy any additions and changes to the following compatability tables: ; sys/ia64/ia32/syscalls.master (take a best guess) ==== //depot/projects/ia64/sys/sys/kse.h#15 (text+ko) ==== @@ -109,6 +109,7 @@ 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 *); #endif /* !_KERNEL */ #endif /* !_SYS_KSE_H_ */
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