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-rw-r--r--docs/Extensions.rst39
-rw-r--r--docs/index.rst4
2 files changed, 43 insertions, 0 deletions
diff --git a/docs/Extensions.rst b/docs/Extensions.rst
new file mode 100644
index 0000000000..062804a9fc
--- /dev/null
+++ b/docs/Extensions.rst
@@ -0,0 +1,39 @@
+===============
+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
diff --git a/docs/index.rst b/docs/index.rst
index c3bb8089da..6b182dac56 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -160,6 +160,7 @@ For developers of applications which use LLVM as a library.
ExtendingLLVM
HowToSetUpLLVMStyleRTTI
ProgrammersManual
+ Extensions
:doc:`LLVM Language Reference Manual <LangRef>`
Defines the LLVM intermediate representation and the assembly form of the
@@ -172,6 +173,9 @@ For developers of applications which use LLVM as a library.
Introduction to the general layout of the LLVM sourcebase, important classes
and APIs, and some tips & tricks.
+:doc:`Extensions`
+ LLVM-specific extensions to tools and formats LLVM seeks compatibility with.
+
:doc:`CommandLine`
Provides information on using the command line parsing library.