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[RuntimeDyld] Add support for R_X86_64_PC8 relocation. 

llvm-svn: 252423
This commit is contained in:
Maksim Panchenko 2015-11-08 19:34:17 +00:00
parent a768624f14
commit 87ef57148a
2 changed files with 34 additions and 0 deletions
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8
llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
View File

@ -249,6 +249,14 @@ void RuntimeDyldELF::resolveX86_64Relocation(const SectionEntry &Section,
<< format("%p\n", Section.Address + Offset)); << format("%p\n", Section.Address + Offset));
break; break;
} }
case ELF::R_X86_64_PC8: {
uint64_t FinalAddress = Section.LoadAddress + Offset;
int64_t RealOffset = Value + Addend - FinalAddress;
assert(isInt<8>(RealOffset));
int8_t TruncOffset = (RealOffset & 0xFF);
Section.Address[Offset] = TruncOffset;
break;
}
case ELF::R_X86_64_PC32: { case ELF::R_X86_64_PC32: {
uint64_t FinalAddress = Section.LoadAddress + Offset; uint64_t FinalAddress = Section.LoadAddress + Offset;
int64_t RealOffset = Value + Addend - FinalAddress; int64_t RealOffset = Value + Addend - FinalAddress;

26
llvm/test/ExecutionEngine/RuntimeDyld/X86/ELF_x64-64_PC8_relocations.s Normal file
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@ -0,0 +1,26 @@
# RUN: llvm-mc -triple=x86_64-pc-linux -relocation-model=pic -filetype=obj -o %T/test_ELF_x86-64_PC8.o %s
# RUN: llvm-rtdyld -triple=x86_64-pc-linux -verify -map-section test_ELF_x86-64_PC8.o,.text.bar=0x10000 -map-section test_ELF_x86-64_PC8.o,.text.baz=0x10040 %T/test_ELF_x86-64_PC8.o
# RUN: llvm-rtdyld -triple=x86_64-pc-linux -verify -map-section test_ELF_x86-64_PC8.o,.text.baz=0x10000 -map-section test_ELF_x86-64_PC8.o,.text.bar=0x10040 %T/test_ELF_x86-64_PC8.o
# Test that R_X86_64_PC8 relocation works.
.section .text.bar,"ax"
.align 16, 0x90
.type bar,@function
bar:
retq
.Ltmp1:
.size bar, .Ltmp1-bar
.section .text.baz,"ax"
.align 16, 0x90
.type baz,@function
baz:
movq %rdi, %rcx
jrcxz bar
retq
.Ltmp2:
.size baz, .Ltmp2-baz
.section ".note.GNU-stack","",@progbits