signal: consider SIGSYS as synchronous signal.

* signal.c (is_cpu_exception): Function renamed to
is_synchronous, and also checks for SIGSYS.
SIGSYS isn't a CPU exception, but is exception-like
in that the program is immediately informed that it
did something wrong.
(sig_handler): Follow above rename.

1 files changed, 3 insertions, 3 deletions

diff --git a/signal.c b/signal.c
index 908e4977..b156641a 100644
--- a/signal.c
+++ b/signal.c
@@ -55,12 +55,12 @@ small_sigset_t sig_blocked_cache;
 static val sig_lambda[MAX_SIG];
 volatile unsigned long sig_deferred;
 
-static int is_cpu_exception(int sig)
+static int is_synchronous(int sig)
 {
   switch (sig) {
   case SIGFPE: case SIGILL:
   case SIGSEGV: case SIGBUS:
-  case SIGTRAP:
+  case SIGTRAP: case SIGSYS:
     return 1;
   default:
     return 0;
@@ -79,7 +79,7 @@ static void sig_handler(int sig)
   val lambda = sig_lambda[sig];
   int gc = 0;
   int as = 0;
-  int exc = is_cpu_exception(sig);
+  int exc = is_synchronous(sig);
   int ic = interrupt_count++;
   int in_interrupt = ic > 0;
   val *stack_lim = 0;