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-rw-r--r--misc/exebin.mac57
1 files changed, 57 insertions, 0 deletions
diff --git a/misc/exebin.mac b/misc/exebin.mac
index 8d1eaf8c..89c68898 100644
--- a/misc/exebin.mac
+++ b/misc/exebin.mac
@@ -1,57 +1,114 @@
; -*- nasm -*-
+
; NASM macro file to allow the `bin' output format to generate
+
; simple .EXE files by constructing the EXE header by hand.
+
; Adapted from a contribution by Yann Guidon <whygee_corp@hol.fr>
+
+
%define EXE_stack_size EXE_realstacksize
+
+
%macro EXE_begin 0
+
ORG 0E0h
+
section .text
+
+
header_start:
+
db 4Dh,5Ah ; EXE file signature
+
dw EXE_allocsize % 512
+
dw (EXE_allocsize + 511) / 512
+
dw 0 ; relocation information: none
+
dw (header_end-header_start)/16 ; header size in paragraphs
+
dw (EXE_absssize + EXE_realstacksize) / 16 ; min extra mem
+
dw (EXE_absssize + EXE_realstacksize) / 16 ; max extra mem
+
dw -10h ; Initial SS (before fixup)
+
dw EXE_endbss + EXE_realstacksize ; Initial SP (1K DPMI+1K STACK)
+
dw 0 ; (no) Checksum
+
dw 100h ; Initial IP - start just after the header
+
dw -10h ; Initial CS (before fixup)
+
dw 0 ; file offset to relocation table: none
+
dw 0 ; (no overlay)
+
align 16,db 0
+
header_end:
+
+
EXE_startcode:
+
section .data
+
EXE_startdata:
+
section .bss
+
EXE_startbss:
+
%endmacro
+
+
%macro EXE_stack 1
+
EXE_realstacksize equ %1
+
%define EXE_stack_size EXE_bogusstacksize ; defeat EQU in EXE_end
+
%endmacro
+
+
%macro EXE_end 0
+
section .text
+
EXE_endcode:
+
section .data
+
EXE_enddata:
+
section .bss
+
alignb 4
+
EXE_endbss:
+
+
EXE_acodesize equ (EXE_endcode-EXE_startcode+3) & (~3)
+
EXE_datasize equ EXE_enddata-EXE_startdata
+
EXE_absssize equ (EXE_endbss-EXE_startbss+3) & (~3)
+
EXE_allocsize equ EXE_acodesize + EXE_datasize
+
+
EXE_stack_size equ 0x800 ; default if nothing else was used
+
%endmacro
+