[2319] 2009-06-12 Vladimir Serbinenko <[email protected]>

Revision: 2319
          http://svn.sv.gnu.org/viewvc/?view=rev&root=grub&revision=2319
Author:   phcoder
Date:     2009-06-12 18:22:38 +0000 (Fri, 12 Jun 2009)
Log Message:
-----------
2009-06-12  Vladimir Serbinenko  <[email protected]>

	* commands/i386/pc/drivemap_int13h.S: add more comments

Modified Paths:
--------------
    trunk/grub2/ChangeLog
    trunk/grub2/commands/i386/pc/drivemap_int13h.S

Modified: trunk/grub2/ChangeLog
===================================================================
--- trunk/grub2/ChangeLog	2009-06-12 06:12:38 UTC (rev 2318)
+++ trunk/grub2/ChangeLog	2009-06-12 18:22:38 UTC (rev 2319)
@@ -1,3 +1,7 @@
+2009-06-12  Vladimir Serbinenko  <[email protected]>
+
+	* commands/i386/pc/drivemap_int13h.S: add more comments
+
 2009-06-11  Pavel Roskin  <[email protected]>
 
 	* Makefile.in (uninstall): Uninstall manuals.

Modified: trunk/grub2/commands/i386/pc/drivemap_int13h.S
===================================================================
--- trunk/grub2/commands/i386/pc/drivemap_int13h.S	2009-06-12 06:12:38 UTC (rev 2318)
+++ trunk/grub2/commands/i386/pc/drivemap_int13h.S	2009-06-12 18:22:38 UTC (rev 2319)
@@ -56,6 +56,7 @@
 	pop	%bx
 	pop	%ax
 
+	/* If the call isn't ah=0x8 or ah=0x15 we must restore %dx.  */
 	cmpb	$0x8, %ah
 	jz	norestore
 	cmpb	$0x15, %ah
@@ -71,7 +72,7 @@
 	mov	%sp, %bp
 
 tail:
-
+	/* Save new flags below %esp so the caller will recieve new flags.  */
 	pushf
 	pop	%dx
 	mov	%dx, 8(%bp)
@@ -93,7 +94,7 @@
 	push	%bp
 	mov	%sp, %bp
 
-	/* Save %dx.  */
+	/* Save %dx. So it won't be restored to original value.  */
 	mov	%dx, 2(%bp)
 
 	jmp tail