Linker Scripts

Purpose

Guide agents through writing and modifying GNU ld linker scripts for embedded targets: MEMORY and SECTIONS commands, VMA vs LMA for code relocation, startup .bss/.data initialization, placing sections in specific regions, and using PROVIDE/KEEP/ALIGN directives.

Triggers

• "How do I write a linker script for my MCU?"
• "How do I place a function in a specific flash/RAM region?"
• "What's the difference between VMA and LMA in a linker script?"
• "How does .bss and .data initialization work at startup?"
• "Linker error: region 'FLASH' overflowed"
• "How do I use weak symbols in a linker script?"

Workflow

1. Linker script anatomy