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This chapter describes the simple binary output module which can be selected with the ‘-Fvobj’ option.
This module is written in 2002-2023 by Volker Barthelmann and is covered by the vasm copyright without modifications.
Use vobj format version 2 which generally reduces file size.
This output module outputs the vobj object format, a simple
portable proprietary object file format of vasm.
The Format is defined as follows:
Header
.byte 0x56,0x4f,0x42,0x4a
.byte flags
Bits 0-1:
1: BIGENDIAN
2: LITTLENDIAN
Bits 2-7:
VOBJ-Version (0-based)
.number bitsperbyte
.number bytespertaddr
.string cpu
.number nsections [1-based]
.number nsymbols [1-based]
nsymbols
.string name
.number type
.number flags
.number secindex
.number val
.number size
nsections
.string name
.string attr
.number flags
.number align
.number size
.number nrelocs
.number databytes
.byte[databytes]
nrelocs [standard|special]
standard
.number type
.number byteoffset
.number bitoffset
.number size
.number mask
.number addend
.number symbolindex | 0 (sectionbase)
special
.number type
.number size
.byte[size]
.number:[taddr]
.byte 0--127 [0--127]
.byte 128-191 [x-0x80 bytes little-endian], fill remaining with 0
.byte 192-255 [x-0xC0 bytes little-endian], fill remaining with 0xff [vobj version 2+]
None.
Some known problems of this module at the moment:
This module has the following error messages:
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