Linkage Kit Manual V6-00 - Fujitsu

CHAPTER 6 LINKER OPTIONS
6.2.25 Automatic Allocation Specification (-AL)
Automatic allocation of sections is specified.
■ Automatic Allocation Specification (-AL)
[Format]
-AL { 0 | 1 | 2 }
[Parameters]
No automatic allocation (default)
If an absolute section exists in the area, the order of allocation is changed appropriately to avoid
overlapping with the section.
Whether to allocate to the ROM area or RAM area is determined based on the section attributes. Then
allocation is carried out to free space of each area.
[Descriptions]
Automatic allocation of sections is specified.
• If the parameter is 1
If an absolute section exists when allocating sections to the areas specified by the -ra or -ro option,
relocatable sections are allocated in such a way that allocation addresses do not overlap. In such cases,
sections are allocated in descending order of the alignment value and size starting with the section of the
largest alignment value and size. In this way, optimal allocation is implemented where free space is
minimum.
• If the parameter is 2
Whether to allocate sections whose allocation is not specified by the -sc option to the ROM area or
RAM area is determined based on the section attributes. Then such sections are allocated to free space
of each area.
See also Section "5.6 Automatically Locating Sections".
[Example]
flnk911s -AL 1 -ro ROM=0x1000/0x1FFF
-sc code1+code2+code3=ROM...
Each section is given as follows.
• code1 : relocatable, size=0x18
• code2 : relocatable, size =0x10
• code3 : relocatable, size =0x30
• AbsSec : absolute, address range=0x1010 to 0x1017
Figure 6.2-8 shows the link map for this case.
126 PART II LINKER