IRC.

1 files changed, 50 insertions, 1 deletions

diff --git a/open_issues/gnat.mdwn b/open_issues/gnat.mdwn
index fb624fad..2d17e275 100644
--- a/open_issues/gnat.mdwn
+++ b/open_issues/gnat.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2011, 2012 Free Software Foundation, Inc."]]
 
 [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
 id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -38,6 +38,55 @@ svn://svn.debian.org/gcccvs/branches/sid@5638
 6ca36cf4-e1d1-0310-8c6f-e303bb2178ca'
 
 
+## IRC, freenode, #hurd, 2012-07-17
+
+    <gnu_srs> I've found the remaining problem with gnat backtrace for Hurd!
+      Related to the stack frame.
+    <gnu_srs> This version does not work: one relying on static assumptions
+      about the frame layout
+    <gnu_srs> Causing segfaults.
+    <gnu_srs> Any interest to create a test case out of that piece of code,
+      taken from gcc/ada/tracebak.c?
+    <braunr> gnu_srs: sure
+
+
+### IRC, freenode, #hurd, 2012-07-18
+
+    <braunr> "Digging further revealed that the GNU/Hurd stack frame does not
+      seem to
+    <braunr> be static enough to define USE_GENERIC_UNWINDER in
+      gcc/ada/tracebak.c.
+    <braunr> "
+    <braunr> what do you mean by a "stack frame does not seem to be static
+      enough" ?
+    <gnu_srs> I can qoute from the source file if you want. Otherwise look at
+      the code yourself: gcc/ada/tracebak,c
+    <gnu_srs> I mean that something is wrong with the stack frame for
+      Hurd. This is the code I wanted to use as a test case for the stack.
+    <gnu_srs> Remember?
+    <braunr> more or less
+    <braunr> ah, "static assumptions"
+    <braunr> all right, i don't think anything is "wrong" with stack frames
+    <braunr> but if you use a recent version of gcc, as indicated in the code,
+      -fomit-frame-pointer is enabled by default
+    <braunr> so your stack frame won't look like it used to be without the
+      option
+    <braunr> hence the need for USE_GCC_UNWINDER
+    <braunr> http://en.wikipedia.org/wiki/Call_stack explains this very well
+    <gnu_srs> However, kfreebsd does not seem to need USE_GCC_UNWINDER, how
+      come?
+    <braunr> i guess they don't omit the frame pointer
+    <braunr> your fix is good btw
+    <gnu_srs> thanks
+
+
+### IRC, freenode, #hurd, 2012-07-19
+
+    <gnu_srs> tschwinge: The bug in #681998 should go upstream. Applied in
+      Debian already. Hopefully this is the last patch needed for the port of
+      GNAT to Hurd.
+
+
 ---