[SCM] master: 2008-04-01 Phil Muldoon <pmuldoon@redhat.com>

[pmuldoon@sourceware.org]

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- Log -----------------------------------------------------------------
commit 3320ba30bfea0b4d2eda0c7f368834097dcde46a
Author: Phil Muldoon <pmuldoon@redhat.com>
Date:   Tue Apr 1 13:55:46 2008 +0100

    2008-04-01  Phil Muldoon  <pmuldoon@redhat.com>
    
            * funit-watchpoint.S: Comment.

-----------------------------------------------------------------------

Summary of changes:
 frysk-core/frysk/pkglibdir/ChangeLog          |    1 +
 frysk-core/frysk/pkglibdir/funit-watchpoint.S |   23 +++++++++++++++++++++--
 2 files changed, 22 insertions(+), 2 deletions(-)

First 500 lines of diff:
diff --git a/frysk-core/frysk/pkglibdir/ChangeLog b/frysk-core/frysk/pkglibdir/ChangeLog
index 504e7f5..97d9c2c 100644
--- a/frysk-core/frysk/pkglibdir/ChangeLog
+++ b/frysk-core/frysk/pkglibdir/ChangeLog
@@ -1,6 +1,7 @@
 2008-04-01  Phil Muldoon  <pmuldoon@redhat.com>
 
 	* funit-watchpoint.S: New.
+	Comment.
 
 2008-03-18  Stan Cox  <scox@redhat.com>
 
diff --git a/frysk-core/frysk/pkglibdir/funit-watchpoint.S b/frysk-core/frysk/pkglibdir/funit-watchpoint.S
index eb0863f..67fce05 100644
--- a/frysk-core/frysk/pkglibdir/funit-watchpoint.S
+++ b/frysk-core/frysk/pkglibdir/funit-watchpoint.S
@@ -39,25 +39,44 @@
 
 #include "frysk-asm.h"
 
+// Function to write to a global var memory address and then exit.
+// This tests the ability of a the watchpoint code to catch
+// a dead simple and basic watchpoint test condition. If the
+// program exits before the Watchpoint fired, the test fails.
+//
+// This program is normally started, blocked at entry. Then the 
+// watchpoint is applied in the debugger. Then the program is set
+// to continue.
 FUNCTION_BEGIN(main,0)
 MAIN_PROLOGUE(0)
 NOP
-	
+
+// Load source variables address into GPR 1
 LOAD_IMMED_BYTE (REG1, source)
+
+// Load the literal value 0x77 into GPR3. The value isn't important
+// the actual writing of the data is.
 LOAD_IMMED_BYTE (REG3, 0x77)
+
+// Clear the decks ...
 NOP
 NOP
 NOP
+
+// Write 0x77 into the location of source (held by GPR1)
 STORE(REG3, REG1)
+
+// Clear the decks ....
 NOP
 NOP
 NOP
 
-
+// End. And exit
 MAIN_EPILOGUE(0)
 FUNCTION_RETURN(main,0)
 FUNCTION_END(main,0)
 
+// Declare a global variable source. One byte and populate it
 .data
 .globl source
 source:						// Set up memory locations


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