Reset signal handler to SIG_DFL on a call to raise()

git-svn-id: svn://svn.cc65.org/cc65/trunk@2018 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/common/raise.s

@@ -28,6 +28,15 @@ _raise:
         sta     jmpvec+1
         lda     sigtable+1,x
         sta     jmpvec+2
+                            
+; Reset the signal handler to SIG_DFL (I don't like this because it may
+; introduce race conditions, but it's the simplest way to satisfy the 
+; standard).
+
+        lda     #<__sig_dfl
+        sta     sigtable,x
+        lda     #>__sig_dfl
+        sta     sigtable+1,x
 
 ; Restore the signal number and call the function
 
@@ -42,3 +51,4 @@ _raise:
 invalidsig:
         rts
 
+