From: Eugene Leviant <eleviant@accesssoftek.com>
Date: Tue, 27 Dec 2016 09:51:38 +0000 (+0000)
Subject: RuntimeDyldELF: add R_AARCH64_ADD_ABS_LO12_NC reloc
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9b804c5b0af2fbc6180107acc3a712d7898c02eb;p=llvm

RuntimeDyldELF: add R_AARCH64_ADD_ABS_LO12_NC reloc

Differential revision: https://reviews.llvm.org/D28115


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290598 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index a977dce06bb..fea932078c4 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -453,6 +453,15 @@ void RuntimeDyldELF::resolveAArch64Relocation(const SectionEntry &Section,
     support::ulittle32_t::ref{TargetPtr} = TargetValue;
     break;
   }
+  case ELF::R_AARCH64_ADD_ABS_LO12_NC: {
+    // Operation: S + A
+    uint64_t Result = Value + Addend;
+
+    // Immediate goes in bits 21:10 of LD/ST instruction, taken
+    // from bits 11:0 of X
+    *TargetPtr |= ((Result & 0xfff) << 10);
+    break;
+  }
   case ELF::R_AARCH64_LDST32_ABS_LO12_NC: {
     // Operation: S + A
     uint64_t Result = Value + Addend;
diff --git a/test/ExecutionEngine/RuntimeDyld/AArch64/ELF_ARM64_relocations.s b/test/ExecutionEngine/RuntimeDyld/AArch64/ELF_ARM64_relocations.s
index f83f6bf8793..c57234a906e 100644
--- a/test/ExecutionEngine/RuntimeDyld/AArch64/ELF_ARM64_relocations.s
+++ b/test/ExecutionEngine/RuntimeDyld/AArch64/ELF_ARM64_relocations.s
@@ -14,6 +14,9 @@ g:
         movk    x0, #:abs_g1_nc:f
 # R_AARCH64_MOVW_UABS_G0_NC
         movk    x0, #:abs_g0_nc:f
+a:
+# R_AARCH64_ADD_ABS_LO12_NC
+        add x0, x0, :lo12:f
         ret
         .Lfunc_end0:
         .size   g, .Lfunc_end0-g
@@ -31,3 +34,7 @@ k:
 # rtdyld-check: *{4}(g + 8) = 0xf2b13560
 # rtdyld-check: *{4}(g + 12) = 0xf299bde0
 # rtdyld-check: *{8}k = f
+
+## f & 0xFFF = 0xdef (bits 11:0 of f)
+## 0xdef << 10 = 0x37bc00
+# rtdyld-check: *{4}(a) = 0x9137bc00