mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
8e22855ea6
Add support for the COFF relocation types IMAGE_REL_I386_DIR32NB and IMAGE_REL_AMD64_ADDR32NB for 32- and 64-bit respectively. These are similar to normal 4-byte relocations except that they do not include the base address of the image. Image-relative relocations are used for debug information (32-bit) and SEH unwind tables (64-bit). A new MCSymbolRef variant called 'VK_COFF_IMGREL32' is introduced to specify such relocations. For AT&T assembly, this variant can be accessed using the symbol suffix '@imgrel'. llvm-svn: 179240
40 lines
761 B
ReStructuredText
40 lines
761 B
ReStructuredText
===============
|
|
LLVM Extensions
|
|
===============
|
|
|
|
.. contents::
|
|
:local:
|
|
:depth: 1
|
|
|
|
.. toctree::
|
|
:hidden:
|
|
|
|
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).
|
|
|
|
.. code-block:: gas
|
|
|
|
.text
|
|
fun:
|
|
mov foo@IMGREL(%ebx, %ecx, 4), %eax
|
|
|
|
.section .pdata
|
|
.long fun@IMGREL
|
|
.long (fun@imgrel + 0x3F)
|
|
.long $unwind$fun@imgrel
|