Using the GNU Linker
FreePowerful linker script language for precise control over binary output layout.
FreeFree tier
About Using the GNU Linker
The GNU linker (ld) provides a powerful command language for controlling the link process. It allows precise specification of input files, file formats, output file layout, memory placement, and symbol assignments. The linker script language includes C-like expressions, built-in functions, and special variables like the location counter. It is essential for embedded system development and other low-level software projects where exact memory layout is required.
Key Features
SECTIONS command for specifying output file layout
MEMORY command for describing target memory availability
C-like expression evaluation with arithmetic operators and built-in functions
Support for integer constants with K and M scaling suffixes
Location counter variable (dot) for tracking current output position
Symbol definition, assignment, and quoting for unusual names
Entry point specification
Option commands for controlling linker behavior
Pros & Cons
Pros
- Provides explicit control over the entire link process
- Flexible script language with C-like syntax
- Supports memory layout definition for diverse architectures
- Includes built-in arithmetic functions and location counter
Best For
Specifying memory layout for embedded systemsLinking object files into executables or shared librariesConfiguring output file format and section placementCreating custom link scripts for bootloaders or kernels