IA64 Runtime support patches. With this in place

Systemtap should now be able to build on Ia64.
Includes supports for - function probes, return probes,
function parameter access and dumping stack backtrace.
Added by Anil S Keshavamurthy <Anil.s.keshavamurthy@intel.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/runtime/stack.c b/runtime/stack.c
index bc9630dc..c09b8171 100644
--- a/runtime/stack.c
+++ b/runtime/stack.c
@@ -1,3 +1,13 @@
+/* Stack tracing functions
+ * Copyright (C) 2005 Red Hat Inc.
+ * Copyright (C) 2005 Intel Corporation.
+ *
+ * This file is part of systemtap, and is free software.  You can
+ * redistribute it and/or modify it under the terms of the GNU General
+ * Public License (GPL); either version 2, or (at your option) any
+ * later version.
+ */
+
 #ifndef _STACK_C_ /* -*- linux-c -*- */
 #define _STACK_C_
 
@@ -38,6 +48,62 @@ static void __stp_stack_sprint (String str, unsigned long *stack, int verbose, i
 	}
 }
 
+#elif defined (__ia64__)
+struct dump_para{
+  unsigned long *sp;
+  String str;
+};
+
+static void __stp_show_stack_sym(struct unw_frame_info *info, void *arg)
+{
+   unsigned long ip, skip=1;
+   String str = ((struct dump_para*)arg)->str;
+   struct pt_regs *regs = container_of(((struct dump_para*)arg)->sp, struct pt_regs, r12);
+
+	do {
+		unw_get_ip(info, &ip);
+		if (ip == 0) break;
+                if (skip){
+			if (ip == REG_IP(regs))
+				skip = 0;
+                        else continue;
+                }
+		_stp_string_cat(str, " ");
+		_stp_symbol_sprint(str, ip);
+		_stp_string_cat (str, "\n");
+        } while (unw_unwind(info) >= 0);
+}
+
+static void __stp_show_stack_addr(struct unw_frame_info *info, void *arg)
+{
+   unsigned long ip, skip=1;
+   String str = ((struct dump_para*)arg)->str;
+   struct pt_regs *regs = container_of(((struct dump_para*)arg)->sp, struct pt_regs, r12);	
+
+	do {
+		unw_get_ip(info, &ip);
+		if (ip == 0) break;
+		if (skip){
+			if (ip == REG_IP(regs))
+				skip = 0;
+			continue;
+		}
+		_stp_sprintf (str, "%lx ", ip);
+	} while (unw_unwind(info) >= 0);
+}
+
+static void __stp_stack_sprint (String str, unsigned long *stack, int verbose, int levels)
+{
+  struct dump_para para;
+
+	para.str = str;
+	para.sp  = stack; 
+	if (verbose)
+	    unw_init_running(__stp_show_stack_sym, &para);
+        else
+	    unw_init_running(__stp_show_stack_addr, &para);
+}
+
 #elif  defined (__i386__)
 
 static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)