From 146216ccb40e64d34f28d585b3b2f1328cc8a121 Mon Sep 17 00:00:00 2001 From: akr Date: Sun, 15 Jul 2007 01:18:55 +0000 Subject: [PATCH] add comment. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12791 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- ia64.s | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/ia64.s b/ia64.s index ba5241daf2..3865712266 100644 --- a/ia64.s +++ b/ia64.s @@ -6,6 +6,11 @@ // void rb_ia64_flushrs(void) { __builtin_ia64_flushrs(); } // void *rb_ia64_bsp(void) { return __builtin_ia64_bsp(); } // +// Note that rb_ia64_flushrs and rb_ia64_bsp works in its own stack frame. +// It's because BSP is updated by br.call/brl.call (not alloc instruction) +// So rb_ia64_flushrs flushes stack frames including caller's one. +// rb_ia64_bsp returns the address next to caller's register stack frame. +// .file "ia64.c" .text .align 16