1 files changed, 89 insertions, 0 deletions
diff --git a/runtime/regs-ia64.c b/runtime/regs-ia64.c
new file mode 100644
index 00000000..50bf17d7
--- /dev/null
+++ b/runtime/regs-ia64.c
@@ -0,0 +1,89 @@
+/* -*- linux-c -*- 
+ * IA64 register access functions
+ * 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 _REGS_IA64_C_
+#define _REGS_IA64_C_
+
+#if defined __ia64__
+
+struct ia64_stap_get_arbsp_param {
+	unsigned long ip;
+	unsigned long *address;
+};
+
+static void ia64_stap_get_arbsp(struct unw_frame_info *info, void *arg)
+{
+	unsigned long ip;
+	struct ia64_stap_get_arbsp_param *lp = arg;
+
+	do {
+		unw_get_ip(info, &ip);
+		if (ip == 0)
+			break;
+		if (ip == lp->ip) {
+			unw_get_bsp(info, (unsigned long*)&lp->address);
+			return;
+		}
+	} while (unw_unwind(info) >= 0);
+	lp->address = 0;
+}
+
+static long ia64_fetch_register(int regno, struct pt_regs *pt_regs)
+{
+	struct ia64_stap_get_arbsp_param pa;
+
+	if (regno >= 8 && regno <= 11)
+		return *(unsigned long *)(&pt_regs->r8 + regno - 8);
+	else if (regno < 32 || regno > 127)
+		return 0;
+
+	pa.ip = pt_regs->cr_iip;
+	unw_init_running(ia64_stap_get_arbsp, &pa);
+	if (pa.address == 0)
+		return 0;
+
+	return *ia64_rse_skip_regs(pa.address, regno-32);
+}
+
+static void ia64_store_register(int regno,
+		struct pt_regs *pt_regs,
+		unsigned long value)
+{
+	struct ia64_stap_get_arbsp_param pa;
+	unsigned long rsc_save = 0;
+	unsigned long *addr;
+
+	if (regno >= 8 && regno <= 11) {
+		addr =&pt_regs->r8;
+		addr += regno - 8;
+		*(addr) = value;
+	}
+	else if (regno < 32 || regno > 127)
+		return;
+
+	pa.ip = pt_regs->cr_iip;
+	unw_init_running(ia64_stap_get_arbsp, &pa);
+	if (pa.address == 0)
+		return;
+	*ia64_rse_skip_regs(pa.address, regno-32) = value;
+	//Invalidate all stacked registers outside the current frame
+	asm volatile( "mov %0=ar.rsc;;\n\t"
+			"mov ar.rsc=0;;\n\t"
+			"{\n\tloadrs;;\n\t\n\t\n\t}\n\t"
+			"mov ar.rsc=%1\n\t"
+			:"=r" (rsc_save):"r" (rsc_save):"memory");
+
+	return;
+}
+
+#endif /* if defined __ia64__ */
+
+
+#endif /* _REGS_IA64_C_ */