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From: Jonathan Mini <mini@FreeBSD.org>
Subject: PERFORCE change 16244 for review
To: Perforce Change Reviews <perforce@freebsd.org>
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http://people.freebsd.org/~peter/p4db/chv.cgi?CH=16244

Change 16244 by mini@mini_stylus on 2002/08/18 21:35:41

	Add function thread_setcontext(), which does the same thing as
	setcontext(3) in userland, but from the kernel. This is also
	Dan's code.

Affected files ...

.. //depot/projects/kse/sys/kern/kern_thread.c#85 edit
.. //depot/projects/kse/sys/sys/kse.h#15 edit
.. //depot/projects/kse/sys/sys/proc.h#121 edit

Differences ...

==== //depot/projects/kse/sys/kern/kern_thread.c#85 (text+ko) ====

@@ -44,6 +44,7 @@
 #include <sys/jail.h>
 #include <sys/kse.h>
 #include <sys/ktr.h>
+#include <sys/ucontext.h>
 
 #include <vm/vm.h>
 #include <vm/vm_object.h>
@@ -189,6 +190,21 @@
 	allocated_threads--;	/* XXXSMP */
 }
 
+int
+thread_setcontext(struct thread *td, ucontext_t *uc)
+{
+	int ret;
+
+	ret = set_mcontext(td, &uc->uc_mcontext);
+	if (ret == 0) {
+		SIG_CANTMASK(uc->uc_sigmask);
+		PROC_LOCK(td->td_proc);
+		td->td_proc->p_sigmask = uc->uc_sigmask;
+		PROC_UNLOCK(td->td_proc);
+	}
+	return (ret);
+}
+
 /*
  * Initialize global thread allocation resources.
  */

==== //depot/projects/kse/sys/sys/kse.h#15 (text+ko) ====

@@ -33,6 +33,7 @@
 #ifndef SYS_KSE_H
 #define SYS_KSE_H
 #include <machine/kse.h>
+#include <sys/ucontext.h>
 /* 
  * This file defines the structures needed for communication between
  * the userland and the kernel when running a KSE-based threading system.
@@ -75,4 +76,8 @@
 };
 #define GMBXF_CRITICAL 0x00000001
 
+#ifdef _KERNEL
+int	thread_setcontext(struct thread *td, ucontext_t *uc);
+#endif	/* _KERNEL */
+
 #endif

==== //depot/projects/kse/sys/sys/proc.h#121 (text+ko) ====


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