Disable the code that allocates W|X memory. There is fallback code that

gets used if allocating W|X memory fails, which is probably a bit slower.
However, that is much better than commit a W^X violation which currently
gets you killed.

ok jca@

lib/mesa/src/gallium/auxiliary/rtasm/rtasm_execmem.c

@@ -69,6 +69,16 @@ static struct mem_block *exec_heap = NULL;
 static unsigned char *exec_mem = NULL;
 
 
+#ifdef __OpenBSD__
+
+static int
+init_heap(void)
+{
+   return 0;
+}
+
+#else
+
 static int
 init_heap(void)
 {
@@ -83,6 +93,8 @@ init_heap(void)
    return (exec_mem != MAP_FAILED);
 }
 
+#endif
+
 
 void *
 rtasm_exec_malloc(size_t size)

lib/mesa/src/mapi/u_execmem.c

@@ -45,8 +45,15 @@ static unsigned int head = 0;
 
 static unsigned char *exec_mem = (unsigned char *)0;
 
+#if defined(__OpenBSD__)
 
-#if defined(__linux__) || defined(__OpenBSD__) || defined(_NetBSD__) || defined(__sun) || defined(__HAIKU__)
+static int
+init_map(void)
+{
+  return 0;
+}
+
+#elif defined(__linux__) || defined(_NetBSD__) || defined(__sun) || defined(__HAIKU__)
 
 #include <unistd.h>
 #include <sys/mman.h>

lib/mesa/src/mesa/main/execmem.c

@@ -36,7 +36,20 @@
 
 
 
-#if defined(__linux__) || defined(__OpenBSD__) || defined(_NetBSD__) || defined(__sun) || defined(__HAIKU__)
+#if defined(__OpenBSD__)
+
+void *
+_mesa_exec_malloc(GLuint size)
+{
+   return NULL;
+}
+
+void
+_mesa_exec_free(void *addr)
+{
+}
+
+#elif defined(__linux__) || defined(_NetBSD__) || defined(__sun) || defined(__HAIKU__)
 
 /*
  * Allocate a large block of memory which can hold code then dole it out