[PATCH] AArch64_BE Elf support for MC-JIT runtime dynamic linker

[Christian Pirker]

Hi all,

This patch adds AArch64 big endian target support to the MC-JIT runtime dynamic linker.
Please review.

Thanks,
Christian


http://llvm-reviews.chandlerc.com/D3179

Files:
  lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
  lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
  lib/MC/MCObjectFileInfo.cpp
  test/CodeGen/AArch64/pic-eh-stubs.ll

Index: lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
===================================================================
--- lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -490,7 +490,7 @@
 }
 
 uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) {
-  if (Arch == Triple::aarch64) {
+  if (Arch == Triple::aarch64 || Arch == Triple::aarch64_be) {
     // This stub has to be able to access the full address space,
     // since symbol lookup won't necessarily find a handy, in-range,
     // PLT stub for functions which could be anywhere.
Index: lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
===================================================================
--- lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -844,6 +844,7 @@
                          (uint32_t)(Addend & 0xffffffffL));
     break;
   case Triple::aarch64:
+  case Triple::aarch64_be:
     resolveAArch64Relocation(Section, Offset, Value, Type, Addend);
     break;
   case Triple::arm: // Fall through.
Index: lib/MC/MCObjectFileInfo.cpp
===================================================================
--- lib/MC/MCObjectFileInfo.cpp
+++ lib/MC/MCObjectFileInfo.cpp
@@ -283,7 +283,8 @@
       TTypeEncoding = (CMModel == CodeModel::Small)
         ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
     }
-  }  else if (T.getArch() ==  Triple::aarch64) {
+  }  else if (T.getArch() == Triple::aarch64 ||
+              T.getArch() == Triple::aarch64_be ) {
     // The small model guarantees static code/data size < 4GB, but not where it
     // will be in memory. Most of these could end up >2GB away so even a signed
     // pc-relative 32-bit address is insufficient, theoretically.
Index: test/CodeGen/AArch64/pic-eh-stubs.ll
===================================================================
--- test/CodeGen/AArch64/pic-eh-stubs.ll
+++ test/CodeGen/AArch64/pic-eh-stubs.ll
@@ -1,4 +1,5 @@
 ; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -o - %s | FileCheck %s
+; RUN: llc -mtriple=aarch64_be-none-linux-gnu -relocation-model=pic -o - %s | FileCheck %s
 
 ; Make sure exception-handling PIC code can be linked correctly. An alternative
 ; to the sequence described below would have .gcc_except_table itself writable
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