Zilog Z80380 Manual do Utilizador descarregar pdf (Página 52)

Introduction Linking Files

3–2 UM004001-COR1103

• Reads in Relocatable object modules and library files in Common Object File Format

(COFF) or ZiLOG Object Module Format (ZOMF)

• Resolves external references

• Assigns absolute addresses to Relocatable sections

• Supports Source-Level Debugging (SLD)

• Generates a single executable module to download into the target system or burn into

OTP or EPROM programmable devices

• Generates a map file

• Generates COFF files (for Libraries)

Linkage Editing

The linker creates a single executable load module from multiple relocatable objects.

Resolving External References

After reading multiple object modules, the linker searches through each of them to resolve

external references to public symbols. The linker looks for the definition of public symbols

corresponding to each external symbol in the object module.

Relocating Addresses

The linker allows the user to specify where the code and data are stored in the target proces-

sor system’s memory at run-time. Changing relocation addresses within each section to an

absolute address is handled in this phase.

Debugging Support

When the debug option is specified, the linker creates an executable file that can be loaded

into the debugger at run-time. A warning message is generated if any of the object modules

do not contain a special section that has debug symbols for the corresponding source module.

Such a warning indicates that a source file was compiled or assembled without turning on a

special switch that tells the compiler or assembler to include debug symbols information

while creating a relocatable object module.

Creating Map Files

The linker can be directed to create a map file that details the location of the Relocatable sec-

tions and Public Symbols.

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Zilog Z80380 Manual do Utilizador Página 52