AMCX file format

Introduction

The AMCX file format is used for all executable files used in AMC-OS, including kernel itself. They are equivalent to PE for DOS/Windows, ELF for Unix and so on.

Linking of object files to build an AMCX file is done by the AMC-OS Linker.

API

To manipulate AMCX files, structures are defined in :

• CORE\INC\AMCOSEXE.ASH for ASM files
• linker\amcos_linker\amcos_linker.h for C files

Header

Header of an AMCX file

Offset	Description	Type	Notes
+00H	Magic Number	char[4]	'AMCX'
+04H	Header size	__uint32
+08H	Subheader size	__uint32
+0CH	Checksum	__uint16
+0EH	Header version	__uint16
+10H	reserved for future use	__uint32
+14H	Application short name	char[32]
+34H	Application version	__uint32
+38H	Offset of application info structure	__uint32
+3CH	Required CPU	__uint32
+40H	Required OS version	__uint32
+44H	reserved for future use	__uint32
+48H	Offset of segments list	__uint32
+4CH	Number of segments in segments list	__uint32
+50H	Offset of imported symbols list	__uint32
+54H	Number of imported symbols	__uint32
+58H	Offset of exported symbols list	__uint32	Symbols exported in DLL
+5CH	Number of exported symbols	__uint32
+60H	Offset of relocations list	__uint32
+64H	Number of relocations	__uint32
+68H	Offset of entry point	__uint32	Offset in first code segment found
+6CH	Default thread stack size	__uint32