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