From f9f77c3c9920e616761c2d957cd56c5f22e176ca Mon Sep 17 00:00:00 2001
From: Jim Wilcoxson <prirun@gmail.com>
Date: Mon, 13 Apr 2020 22:00:00 +0000
Subject: [PATCH] Check if Prime RAM allocation succeeded instead of seg
 faulting

---
 em.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/em.c b/em.c
index 19c6835..ac82e90 100644
--- a/em.c
+++ b/em.c
@@ -4695,6 +4695,10 @@ int main (int argc, char **argv) {
   for (i=0; i < IOTLBENTS; i++)
     gv.iotlb[i].valid = 0;
   physmem = malloc(gv.memlimit * sizeof(*physmem));
+  if (physmem == NULL) {
+    perror("Error allocating Prime memory block");
+    fatal("Can't allocate Prime memory block");
+  }
   bzero(MEM, 64*1024*2);              /* zero first 64K words */
   
   /* if no maps were specified on the command line, look for ring0.map and