microkernel/mach/gnumach/interface/thread_get_state, thread_set_state: New.

4 files changed, 51 insertions, 2 deletions

diff --git a/microkernel/mach/gnumach/debugging.mdwn b/microkernel/mach/gnumach/debugging.mdwn
index cf02471d..a5daf4f1 100644
--- a/microkernel/mach/gnumach/debugging.mdwn
+++ b/microkernel/mach/gnumach/debugging.mdwn
@@ -14,7 +14,7 @@ Here are some hints to debug with GNU Mach.
 [[!toc levels=2]]
 
 
-# Kernel Debugger
+# Kernel Debugger (KDB)
 
 Mach has a built-in kernel debugger.
 [Manual](http://www.gnu.org/software/hurd/gnumach-doc/Kernel-Debugger.html).
diff --git a/microkernel/mach/gnumach/interface/thread_get_state.mdwn b/microkernel/mach/gnumach/interface/thread_get_state.mdwn
new file mode 100644
index 00000000..c44cb927
--- /dev/null
+++ b/microkernel/mach/gnumach/interface/thread_get_state.mdwn
@@ -0,0 +1,37 @@
+[[!meta copyright="Copyright © 2014 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="thread_get_state, thread_set_state"]]
+
+[[!tag open_issue_documentation]]
+
+
+# `i386_DEBUG_STATE`
+
+Access the x86 debug registers.
+
+[[!message-id "20110821231730.GF6004@type.famille.thibault.fr"]],
+[[!GNU_Savannah_Git_hurd_gnumach d14e4924c55e3016d1ddf7a38a7e93460ca10ac8]].
+
+For example, used by [[/GDB]] for implementing hardware watchpoints.
+
+
+## Open Issues
+
+[[!tag open_issue_gnumach]]
+
+  * Continuing on [[!message-id "87iokondoc.fsf@schwinge.name"]], do we need to
+    sanitize some of the values?  Is user space allowed to set DR7's GD flag as
+    well as DR7's reserved flags, or should these flags be masked out?
+    Anything else?
+
+  * If [[KDB|debugging]] is using hardware watchpoints, those set by user space
+    applications will be ignored.  This is because KDB and the user-space
+    application are competing for the x86 debug registers, and KDB wins.
diff --git a/microkernel/mach/gnumach/interface/thread_set_state.mdwn b/microkernel/mach/gnumach/interface/thread_set_state.mdwn
new file mode 100644
index 00000000..35b75e98
--- /dev/null
+++ b/microkernel/mach/gnumach/interface/thread_set_state.mdwn
@@ -0,0 +1,11 @@
+[[!meta copyright="Copyright © 2014 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 redir=thread_get_state]]
diff --git a/user/jkoenig/java.mdwn b/user/jkoenig/java.mdwn
index ebfa45a4..ebd00f6b 100644
--- a/user/jkoenig/java.mdwn
+++ b/user/jkoenig/java.mdwn
@@ -194,7 +194,8 @@ for broader testing.
       * The FPU state is not included in the `ucontext_t` passed to the signal
         handler.  On the other hand, `ucontext_t` is actually being somewhat
         deprecated: the functions to restore it are no longer in POSIX.
-        `thread_get_state`() should return this information, in case we decide
+        [[microkernel/mach/gnumach/interface/thread_get_state]] should return
+        this information, in case we decide
         to fill the gap, and there might be existing glibc wrappers, too.
 
   * Perhaps have a look at `SA_NOCLDWAIT`.