diff options
| -rw-r--r-- | lib/MC/ELFObjectWriter.cpp | 1 | ||||
| -rw-r--r-- | lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp | 17 | ||||
| -rw-r--r-- | test/MC/ELF/x86_64-reloc-sizetest.s | 13 |
3 files changed, 30 insertions, 1 deletions
diff --git a/lib/MC/ELFObjectWriter.cpp b/lib/MC/ELFObjectWriter.cpp index d7ec3d8..78588ae 100644 --- a/lib/MC/ELFObjectWriter.cpp +++ b/lib/MC/ELFObjectWriter.cpp @@ -1698,7 +1698,6 @@ unsigned X86ELFObjectWriter::GetRelocType(const MCValue &Target, default: llvm_unreachable("invalid fixup kind!"); case FK_Data_8: Type = ELF::R_X86_64_64; break; case X86::reloc_signed_4byte: - assert(isInt<32>(Target.getConstant())); switch (Modifier) { default: llvm_unreachable("Unimplemented"); diff --git a/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp b/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp index c90e41c..e7713f3 100644 --- a/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp +++ b/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp @@ -93,6 +93,23 @@ public: assert(Fixup.getOffset() + Size <= DataSize && "Invalid fixup offset!"); + + // Check that the upper bits are either all 0 or all 1's + switch (Size) { + case 1: + assert((isInt<8>(Value) || isUInt<8>(Value)) && + "Value does not fit in a 1Byte Reloc"); + break; + case 2: + assert((isInt<16>(Value) || isUInt<16>(Value)) && + "Value does not fit in a 2Byte Reloc"); + break; + case 4: + assert((isInt<32>(Value) || isUInt<32>(Value)) && + "Value does not fit in a 4Byte Reloc"); + break; + } + for (unsigned i = 0; i != Size; ++i) Data[Fixup.getOffset() + i] = uint8_t(Value >> (i * 8)); } diff --git a/test/MC/ELF/x86_64-reloc-sizetest.s b/test/MC/ELF/x86_64-reloc-sizetest.s new file mode 100644 index 0000000..c899a94 --- /dev/null +++ b/test/MC/ELF/x86_64-reloc-sizetest.s @@ -0,0 +1,13 @@ +// RUN: llvm-mc -triple x86_64-linux-gnu -filetype=obj %s | elf-dump | FileCheck %s + +// Tests that relocation value fits in the provided size +// Original bug http://llvm.org/bugs/show_bug.cgi?id=10568 + +L: movq $(L + 2147483648),%rax + + +// CHECK: Relocation 0x00000000 +// CHECK-NEXT: 'r_offset', 0x00000003 +// CHECK-NEXT: 'r_sym' +// CHECK-NEXT: 'r_type', 0x0000000b +// CHECK-NEXT: 'r_addend', 0x80000000 |