kernel: pass more information to user on interrupt

This is meant to facilitate a syscall for returning from interrupts, which
will actually work in the general case as opposed to the current hack, which
only works if the interrupt occured during a syscall (which is correct... for
now).

1 files changed, 7 insertions, 3 deletions

diff --git a/src/kernel/proc.h b/src/kernel/proc.h
index 99eac94..96cd8ba 100644
--- a/src/kernel/proc.h
+++ b/src/kernel/proc.h
@@ -88,6 +88,7 @@ struct Proc {
 
 	/* interrupt handler */
 	void __user *intr_fn;
+	Intr *queuedintr;
 
 	struct {
 		void *buf;
@@ -99,6 +100,12 @@ struct Proc {
 	uint64_t basetime;
 };
 
+/* an interrupt queued for delivery */
+struct Intr {
+	size_t len;
+	char buf[];
+};
+
 extern Proc *proc_cur;
 
 /** Creates the root process. */
@@ -116,9 +123,6 @@ void proc_kill(Proc *proc, int ret);
 /** Tries to reap a dead process / free a tombstone. */
 void proc_tryreap(Proc *dead);
 
-/** Try to interrupt whatever the process is doing instead of PS_RUNNING. */
-void proc_tryintr(Proc *p);
-
 /** Send an interupt to a process. */
 void proc_intr(Proc *p, const char *buf, size_t len);