X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/blobdiff_plain/47388162eff1ff692a152b98b5b12d547067a026..7adb15b6dcf5e168299d7b37219522427f73b0c9:/sys/platform/vkernel64/x86_64/cpu_regs.c

diff --git a/sys/platform/vkernel64/x86_64/cpu_regs.c b/sys/platform/vkernel64/x86_64/cpu_regs.c
index 566582c881..aad8884716 100644
--- a/sys/platform/vkernel64/x86_64/cpu_regs.c
+++ b/sys/platform/vkernel64/x86_64/cpu_regs.c
@@ -63,7 +63,6 @@
 #include <sys/sysctl.h>
 #include <sys/vmmeter.h>
 #include <sys/bus.h>
-#include <sys/upcall.h>
 #include <sys/usched.h>
 #include <sys/reg.h>
 
@@ -507,158 +506,6 @@ sys_sigreturn(struct sigreturn_args *uap)
 	return(EJUSTRETURN);
 }
 
-/*
- * Stack frame on entry to function.  %rax will contain the function vector,
- * %rcx will contain the function data.  flags, rcx, and rax will have
- * already been pushed on the stack.
- */
-struct upc_frame {
-	register_t	rax;
-	register_t	rcx;
-	register_t	rdx;
-	register_t	flags;
-	register_t	oldip;
-};
-
-void
-sendupcall(struct vmupcall *vu, int morepending)
-{
-	struct lwp *lp = curthread->td_lwp;
-	struct trapframe *regs;
-	struct upcall upcall;
-	struct upc_frame upc_frame;
-	int	crit_count = 0;
-
-	/*
-	 * If we are a virtual kernel running an emulated user process
-	 * context, switch back to the virtual kernel context before
-	 * trying to post the signal.
-	 */
-	if (lp->lwp_vkernel && lp->lwp_vkernel->ve) {
-		lp->lwp_md.md_regs->tf_trapno = 0;
-		vkernel_trap(lp, lp->lwp_md.md_regs);
-	}
-
-	/*
-	 * Get the upcall data structure
-	 */
-	if (copyin(lp->lwp_upcall, &upcall, sizeof(upcall)) ||
-	    copyin((char *)upcall.upc_uthread + upcall.upc_critoff, &crit_count, sizeof(int))
-	) {
-		vu->vu_pending = 0;
-		kprintf("bad upcall address\n");
-		return;
-	}
-
-	/*
-	 * If the data structure is already marked pending or has a critical
-	 * section count, mark the data structure as pending and return
-	 * without doing an upcall.  vu_pending is left set.
-	 */
-	if (upcall.upc_pending || crit_count >= vu->vu_pending) {
-		if (upcall.upc_pending < vu->vu_pending) {
-			upcall.upc_pending = vu->vu_pending;
-			copyout(&upcall.upc_pending, &lp->lwp_upcall->upc_pending,
-				sizeof(upcall.upc_pending));
-		}
-		return;
-	}
-
-	/*
-	 * We can run this upcall now, clear vu_pending.
-	 *
-	 * Bump our critical section count and set or clear the
-	 * user pending flag depending on whether more upcalls are
-	 * pending.  The user will be responsible for calling
-	 * upc_dispatch(-1) to process remaining upcalls.
-	 */
-	vu->vu_pending = 0;
-	upcall.upc_pending = morepending;
-	++crit_count;
-	copyout(&upcall.upc_pending, &lp->lwp_upcall->upc_pending,
-		sizeof(upcall.upc_pending));
-	copyout(&crit_count, (char *)upcall.upc_uthread + upcall.upc_critoff,
-		sizeof(int));
-
-	/*
-	 * Construct a stack frame and issue the upcall
-	 */
-	regs = lp->lwp_md.md_regs;
-	upc_frame.rax = regs->tf_rax;
-	upc_frame.rcx = regs->tf_rcx;
-	upc_frame.rdx = regs->tf_rdx;
-	upc_frame.flags = regs->tf_rflags;
-	upc_frame.oldip = regs->tf_rip;
-	if (copyout(&upc_frame, (void *)(regs->tf_rsp - sizeof(upc_frame)),
-	    sizeof(upc_frame)) != 0) {
-		kprintf("bad stack on upcall\n");
-	} else {
-		regs->tf_rax = (register_t)vu->vu_func;
-		regs->tf_rcx = (register_t)vu->vu_data;
-		regs->tf_rdx = (register_t)lp->lwp_upcall;
-		regs->tf_rip = (register_t)vu->vu_ctx;
-		regs->tf_rsp -= sizeof(upc_frame);
-	}
-}
-
-/*
- * fetchupcall occurs in the context of a system call, which means that
- * we have to return EJUSTRETURN in order to prevent eax and edx from
- * being overwritten by the syscall return value.
- *
- * if vu is not NULL we return the new context in %edx, the new data in %ecx,
- * and the function pointer in %eax.
- */
-int
-fetchupcall(struct vmupcall *vu, int morepending, void *rsp)
-{
-	struct upc_frame upc_frame;
-	struct lwp *lp = curthread->td_lwp;
-	struct trapframe *regs;
-	int error;
-	struct upcall upcall;
-	int crit_count;
-
-	regs = lp->lwp_md.md_regs;
-
-	error = copyout(&morepending, &lp->lwp_upcall->upc_pending, sizeof(int));
-	if (error == 0) {
-	    if (vu) {
-		/*
-		 * This jumps us to the next ready context.
-		 */
-		vu->vu_pending = 0;
-		error = copyin(lp->lwp_upcall, &upcall, sizeof(upcall));
-		crit_count = 0;
-		if (error == 0)
-			error = copyin((char *)upcall.upc_uthread + upcall.upc_critoff, &crit_count, sizeof(int));
-		++crit_count;
-		if (error == 0)
-			error = copyout(&crit_count, (char *)upcall.upc_uthread + upcall.upc_critoff, sizeof(int));
-		regs->tf_rax = (register_t)vu->vu_func;
-		regs->tf_rcx = (register_t)vu->vu_data;
-		regs->tf_rdx = (register_t)lp->lwp_upcall;
-		regs->tf_rip = (register_t)vu->vu_ctx;
-		regs->tf_rsp = (register_t)rsp;
-	    } else {
-		/*
-		 * This returns us to the originally interrupted code.
-		 */
-		error = copyin(rsp, &upc_frame, sizeof(upc_frame));
-		regs->tf_rax = upc_frame.rax;
-		regs->tf_rcx = upc_frame.rcx;
-		regs->tf_rdx = upc_frame.rdx;
-		regs->tf_rflags = (regs->tf_rflags & ~PSL_USERCHANGE) |
-				(upc_frame.flags & PSL_USERCHANGE);
-		regs->tf_rip = upc_frame.oldip;
-		regs->tf_rsp = (register_t)((char *)rsp + sizeof(upc_frame));
-	    }
-	}
-	if (error == 0)
-		error = EJUSTRETURN;
-	return(error);
-}
-
 /*
  * cpu_idle() represents the idle LWKT.  You cannot return from this function
  * (unless you want to blow things up!).  Instead we look for runnable threads