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diff --git a/microkernel/mach/gnumach/interface/syscall.mdwn b/microkernel/mach/gnumach/interface/syscall.mdwn
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@@ -0,0 +1,16 @@
+[[!meta copyright="Copyright © 2013 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
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!meta title="System Calls"]]
+
+/!\ Incomplete.
+
+[[!map pages="microkernel/mach/gnumach/interface/syscall/* and !microkernel/mach/gnumach/interface/syscall/*/*"
+show=title]]
diff --git a/microkernel/mach/gnumach/interface/syscall/mach_print.mdwn b/microkernel/mach/gnumach/interface/syscall/mach_print.mdwn
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+++ b/microkernel/mach/gnumach/interface/syscall/mach_print.mdwn
@@ -0,0 +1,53 @@
+[[!meta copyright="Copyright © 2013 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
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+
+# IRC, freenode, #hurd, 2013-01-18
+
+    <braunr> youpi: what would you think of adding a debug-related syscall to
+      gnumach so that we have a printf-like tool even in situations where the
+      code can't perform an rpc (i.e. glibc)
+    <youpi> could be useful indeed
+    <youpi> I've found myself having a hard time making some printfs from odd
+      places of glibc :)
+    <braunr> i also suggest we make it unprivileged
+    <youpi> not enabled by default then
+    <youpi> otherwise it's an easy DoS
+    <braunr> well, for now, we don't care much about DoS, but we do care about
+      debugging
+    <braunr> at least until the very core issues we have are understood and
+      resolved
+    <youpi> I usually frown on debugging feature being too open
+    <braunr> me too
+    <youpi> you would always forget dropping one
+    <braunr> that's why i didn't suggest it earlier
+    <braunr> but i'm wasting too much time finding other decently effective
+      ways
+
+
+## IRC, freenode, #hurd, 2013-01-19
+
+    <braunr> youpi: how about we build this debugging system call in debugging
+      versions only ?
+    <braunr> i suppose you already use such versions for buildds anyway
+    <braunr> MACH_DEBUG is always enabled
+    <braunr> the debugging version only adds --enable-kdb if i'm right
+    <pinotree> check debian/rules
+    <braunr> that, and -fno-omit-frame-pointer
+
+
+## IRC, freenode, #hurd, 2013-01-21
+
+    <braunr> youpi: concerning gnumach, i've added a mach_print system call,
+      with one argument (a null terminated string) to -dbg kernels
+      (--enable-kbd)
+    <youpi> k
+    <braunr> if it's fine with you, i'll commit it too
+    <youpi> I'm fine