Understanding Delphi MAP File

Question

Here is the sample of MAP file from my test project...

.......
 .......
 .......
 0001:001EFC14 00000020 C=CODE     S=.text    G=(none)   M=Vcl.CategoryButtons A         


        

Answer 1

The format is:
SegmentId:StartAddress Length C=SegmentClass S=SegmentName G=SegmentGroup M=ModuleName

The ACBP has something to do with alignment but I can't tell you what the hex numbers mean.

C=CODE: Code-Segment
C=ICODE: Initialization Code-Segment
C=DATA: (initialized) Data-Segment
C=BSS: (uninitialized) Data-Segment
C=TLS: Thread Local Storage

G=(none): No Segment-Group

Answer 2

It mean that your asm code of your unit MainU start at $00232C28 address and the length of compiled unit is $00006998 bytes.

The segment class (C=) is CODE, defined at beginning of map file.

The segment name (S=) is .text

The segment group (G=) is none.

The segment module (M=) is MainU

The ACBP attribute = A9 mean:

• Unnamed absolute portion of memory address space
• A public combining
• The segment may be larger than 64K

Check also: http://files.mpoli.fi/unpacked/software/programm/general/ss0288.zip/ss0288_4.txt

Answer 3

According to this Embarcadero docwiki page the A, C and B are for Alignment, Combination and "Big". It seems the page does not explain what the P means. The hex value is a mask, although as far as I can see it doesn't list all values. (The listed values don't allow for an odd value for instance)

Alignment

• 00 - An absolute segment
• 20 - A byte-aligned segment
• 40 - A word-aligned segment
• 60 - A paragraph-aligned segment
• 80 - A page-aligned segment
• A0 - An unnamed absolute portion of storage

Combination

• 00 - Cannot be combined
• 08 - A public combining segment

Big (for 16 bit)

• 00 - Segment less than 64 K
• 02 - Segment exactly 64K