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LLVM Extensions

Introduction

This document describes extensions to tools and formats LLVM seeks compatibility with.

Machine-specific Assembly Syntax

X86/COFF-Dependent

The following additional relocation type is supported:

@IMGREL (AT&T syntax only) generates an image-relative relocation that corresponds to the COFF relocation types IMAGE_REL_I386_DIR32NB (32-bit) or IMAGE_REL_AMD64_ADDR32NB (64-bit).

.text
fun:
  mov foo@IMGREL(%ebx, %ecx, 4), %eax

.section .pdata
  .long fun@IMGREL
  .long (fun@imgrel + 0x3F)
  .long $unwind$fun@imgrel