A question on walking x86 frame stack

[Gustavo Romero]

Hello,

Does anybody know what's the reason behind the 5 "magic number" being add
(to FP) and subtracted (from SP) in this SA code for walking the stack
(lines 523 and 524):

http://hg.openjdk.java.net/jdk/jdk/file/ec881a19d294/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/x86/X86Frame.java#l523

I think it's just for providing more context / information on the adjacent
frames but I'm not sure... In that sense I'm wondering if the 5 fields up
and down the frame have any special meaning or are indeed only other
adjacent frames.


Thanks.

Best regards,
Gustavo