[2319] 2009-06-12 Vladimir Serbinenko <address@hidden>

[Vladimir Serbinenko]

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  <address@hidden>

        * 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  <address@hidden>
+
+       * commands/i386/pc/drivemap_int13h.S: add more comments
+
 2009-06-11  Pavel Roskin  <address@hidden>
 
        * 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