[openfirmware] [commit] r2846 - cpu/x86

[repository service]

Author: wmb
Date: Mon Jan 23 18:56:19 2012
New Revision: 2846
URL: http://tracker.coreboot.org/trac/openfirmware/changeset/2846

Log:
x86 - debugger support for relative-addressed version.

Modified:
   cpu/x86/debugm.fth

Modified: cpu/x86/debugm.fth
==============================================================================
--- cpu/x86/debugm.fth	Mon Jan 23 18:56:16 2012	(r2845)
+++ cpu/x86/debugm.fth	Mon Jan 23 18:56:19 2012	(r2846)
@@ -31,13 +31,17 @@
    _flush_cache #) call
 c;

-\ Change all the next routines in the indicated range to perform the
-\ in-line next routine
+\ Fix the NEXT routine in the user area to use the non-debug code.
 code fast-next  ( high low -- )
    ax pop   ax pop
    _disable_cache #)  call
-   h# 9020ffad #  ax  mov		\ ax lods  0 [ax] jmp  nop
-   ax         0 [up]  mov
+
++ rel  h# 8bf801ad #  ax mov	ax 0 [up]  mov	\ ax lods  up w add
++ rel  h# fffb0118 #  ax mov	ax 4 [up]  mov	\ 0 [w] bx mov  up bx add
++ rel  h# 909090e3 #  ax mov	ax 8 [up]  mov	\ bx jmp  nop nop nop
+
+- rel  h# 9020ffad #  ax mov	ax 0 [up]  mov	\ ax lods  0 [w] jmp  nop
+
    _flush_cache #)    call
 c;

@@ -45,7 +49,8 @@
    \ We have to expand the code for NEXT in-line here, because if
    \ we let the assembler macro do it, we'll end up with a jump right back
    \ to this routine
-   ax lods   0 [ax] jmp
++ rel  ax lods  up w add   0 [w] bx mov  up bx add   bx jmp
+- rel  ax lods  0 [w] jmp
 end-code

label debnext
@@ -62,26 +67,32 @@
        ax  'user cnt         mov
 \            normal-next #)   ax   lea
        make-even 				\ word-align address
-            normal-next   dup #)   ax   lea
-            -4 allot  token, 			\ relocate address
+- rel      normal-next   dup #)   ax   lea
+- rel      -4 allot  token, 			\ relocate address
+
++ rel      normal-next origin -  #  ax  mov
++ rel      up ax add

ax  'user debug-next  mov
+
             'user 'debug     w    mov
-            0 [w]                 jmp
++ rel      up w add  0 [w] bx mov  up bx add   bx jmp
+- rel      0 [w]                 jmp
          then
       then
    then
    \ We have to expand the code for NEXT in-line here, because if
    \ we let the assembler macro do it, we'll end up with a jump right back
    \ to this routine
-   ax lods   0 [ax] jmp		\ Next
++ rel   ax lods  up w add   0 [w] bx mov  up bx add   bx jmp
+- rel   ax lods   0 [w] jmp		\ Next
 end-code

\ Fix the next routine to use the debug version
-: pnext   (s -- )  debnext debug-next a!  ;
+: pnext   (s -- )  debnext debug-next !  ;

\ Turn off debugging
-: unbug   (s -- )  normal-next debug-next a!  ;
+: unbug   (s -- )  normal-next debug-next !  ;

forth definitions
 unbug