From 654c2d6b7a9274fc281c30c0e91419aadb6dc78a Mon Sep 17 00:00:00 2001 From: Tim Northover Date: Sat, 4 May 2013 20:14:04 +0000 Subject: [PATCH] AArch64: implement relocations for global access The large memory model (default and main viable for JIT) emits addresses in need of relocation as movz x0, #:abs_g3:somewhere movk x0, #:abs_g2_nc:somewhere movk x0, #:abs_g1_nc:somewhere movk x0, #:abs_g0_nc:somewhere To support this we must implement those four relocations in the dynamic loader. This allows (for example) the test-global.ll MCJIT test to pass on AArch64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181132 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../RuntimeDyld/RuntimeDyldELF.cpp | 31 +++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp index 49baf750dbb..5e361ef64ad 100644 --- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp +++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp @@ -296,6 +296,37 @@ void RuntimeDyldELF::resolveAArch64Relocation(const SectionEntry &Section, *TargetPtr = static_cast(Result & 0xffffffffU); break; } + case ELF::R_AARCH64_MOVW_UABS_G3: { + uint64_t Result = Value + Addend; + // Immediate goes in bits 20:5 of MOVZ/MOVK instruction + *TargetPtr |= Result >> (48 - 5); + // Shift is "lsl #48", in bits 22:21 + *TargetPtr |= 3 << 21; + break; + } + case ELF::R_AARCH64_MOVW_UABS_G2_NC: { + uint64_t Result = Value + Addend; + // Immediate goes in bits 20:5 of MOVZ/MOVK instruction + *TargetPtr |= ((Result & 0xffff00000000ULL) >> (32 - 5)); + // Shift is "lsl #32", in bits 22:21 + *TargetPtr |= 2 << 21; + break; + } + case ELF::R_AARCH64_MOVW_UABS_G1_NC: { + uint64_t Result = Value + Addend; + // Immediate goes in bits 20:5 of MOVZ/MOVK instruction + *TargetPtr |= ((Result & 0xffff0000U) >> (16 - 5)); + // Shift is "lsl #16", in bits 22:21 + *TargetPtr |= 1 << 21; + break; + } + case ELF::R_AARCH64_MOVW_UABS_G0_NC: { + uint64_t Result = Value + Addend; + // Immediate goes in bits 20:5 of MOVZ/MOVK instruction + *TargetPtr |= ((Result & 0xffffU) << 5); + // Shift is "lsl #0", in bits 22:21. No action needed. + break; + } } } -- 2.34.1