added bochs debug wrappers

include/util/bochs_magic.inc

@@ -0,0 +1,65 @@
+; Copyright (c) 2024 Elaina Claus
+;
+; Permission is hereby granted, free of charge, to any person obtaining a copy
+; of this software and associated documentation files (the "Software"), to deal
+; in the Software without restriction, including without limitation the rights
+; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+; copies of the Software, and to permit persons to whom the Software is
+; furnished to do so, subject to the following conditions:
+;
+; The above copyright notice and this permission notice shall be included in all
+; copies or substantial portions of the Software.
+;
+; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+; SOFTWARE.
+
+%ifndef __INC_BOCHS_DEBUG_MAGIC
+
+;
+; port_e9_hack: enabled=1 needs to be set in bochsrc.txt/bxrc
+;
+%ifnmacro __BOCHS_PRINTC
+    %macro __BOCHS_PRINTC 1
+        mov al, %1
+        out 0xe9, byte al
+    %endmacro
+%endif
+
+;
+; port_e9_hack: enabled=1 needs to be set in bochsrc.txt/bxrc
+;
+%ifnmacro __BOCHS_BREAK
+    %macro __BOCHS_BREAK 0
+        push ax
+        mov ax, 0x8A00
+        out 0x8A00, word ax
+        pop ax
+    %endmacro
+%endif
+
+;
+; magic_break: enabled=1 needs to be set in bochsrc.txt/bxrc
+;
+%ifnmacro __BOCHS_MAGIC_DEBUG
+    %macro __BOCHS_MAGIC_DEBUG 0
+        xchg bx, bx
+    %endmacro
+%endif
+
+%ifnmacro PRINT_FUNC_LABEL
+    %macro PRINT_FUNC_LABEL 1
+        %define label %1
+        %assign addr label
+        %ifnctx __OUTPUT__
+            __OUTPUT__ "Entry point for '%1' = %d", addr
+        %endif
+    %endmacro
+%endif
+
+%define __INC_BOCHS_DEBUG_MAGIC
+%endif

src/mbr/mbr.nasm

@@ -35,6 +35,7 @@ nop
 ;
 ; ###############
 
+%include "util/bochs_magic.inc"
 %include "cdecl16.inc"
 %include "entry.inc"
 %include "config.inc"

src/vbr/vbr.nasm

@@ -42,6 +42,7 @@ times 54 db 0x00
 ;
 ; ###############
 
+%include "util/bochs_magic.inc"
 %include "cdecl16.inc"
 %include "entry.inc"
 %include "config.inc"