1 files changed, 66 insertions, 0 deletions
diff --git a/core/com32.inc b/core/com32.inc
new file mode 100644
index 0000000..5561c72
--- /dev/null
+++ b/core/com32.inc
@@ -0,0 +1,66 @@
+;; -----------------------------------------------------------------------
+;;
+;;   Copyright 1994-2009 H. Peter Anvin - All Rights Reserved
+;;   Copyright 2009-2010 Intel Corporation; author: H. Peter Anvin
+;;
+;;   This program is free software; you can redistribute it and/or modify
+;;   it under the terms of the GNU General Public License as published by
+;;   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+;;   Boston MA 02111-1307, USA; either version 2 of the License, or
+;;   (at your option) any later version; incorporated herein by reference.
+;;
+;; -----------------------------------------------------------------------
+
+;;
+;; com32.inc
+;;
+;; Common code for running a COM32 image
+;;
+
+		extern pm_api_vector
+
+;
+; Load a COM32 image.  A COM32 image is the 32-bit analogue to a DOS
+; .com file.  A COM32 image is loaded at address 0x101000, with %esp
+; set to the high end of usable memory.
+;
+; A COM32 image should begin with the magic bytes:
+; B8 FF 4C CD 21, which is "mov eax,0x21cd4cff" in 32-bit mode and
+; "mov ax,0x4cff; int 0x21" in 16-bit mode.  This will abort the
+; program with an error if run in 16-bit mode.
+;
+		bits 16
+		section .data16
+
+		; Ersatz com32 invocation structure, to make libcom32
+		; code run the same if linked to the core.  This is in
+		; the .data16 segment so HighMemSize can live here.
+		;
+		; Danger, Will Robinson: it's not clear the use of
+		; core_xfer_buf is safe here.
+		global __com32:data hidden
+		alignz 4
+__entry_esp:
+		dd 0				; Dummy to avoid _exit issues
+__com32:
+		dd 9				; Argument count
+		dd 0				; No command line
+		dd core_intcall			; Intcall entry point
+		dd 0				; Bounce buffer address
+		dd 0				; 64K bounce buffer
+		dd core_farcall			; Farcall entry point
+		dd core_cfarcall		; Cfarcall entry point
+HighMemSize	dd 0				; End of memory pointer (bytes)
+		dd 0				; No module name
+		dd pm_api_vector		; Protected mode functions
+
+		section .uibss
+Com32Name	resb FILENAME_MAX
+
+		section .bss16
+%ifndef HAVE_CURRENTDIRNAME
+		global CurrentDirName:data hidden
+CurrentDirName	resb FILENAME_MAX
+%endif
+
+		section .text16