6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-14 11:32:34 +00:00
Code Issues Projects Releases Wiki Activity

[RuntimeDyld] Fix x86-64 MachO GOT relocation handling.

Browse Source 
For GOT relocations the addend should modify the offset to the
GOT entry, not the value of the entry itself. Teach RuntimeDyldMachO
to do The Right Thing here.

Fixes <rdar://problem/16961886>.
 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209154 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames 2014-05-19 19:21:25 +00:00
parent 8ad418b61b
commit b96f71fed6
3 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
View File

@ -573,6 +573,10 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
RelType == MachO::X86_64_RELOC_GOT_LOAD)) {
assert(IsPCRel);
assert(Size == 2);
// FIXME: Teach the generic code above not to prematurely conflate
// relocation addends and symbol offsets.
Value.Addend -= Addend;
StubMap::const_iterator i = Stubs.find(Value);
uint8_t *Addr;
if (i != Stubs.end()) {
@ -581,7 +585,8 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
Stubs[Value] = Section.StubOffset;
uint8_t *GOTEntry = Section.Address + Section.StubOffset;
RelocationEntry GOTRE(SectionID, Section.StubOffset,
MachO::X86_64_RELOC_UNSIGNED, 0, false, 3);
MachO::X86_64_RELOC_UNSIGNED, Value.Addend, false,
3);
if (Value.SymbolName)
addRelocationForSymbol(GOTRE, Value.SymbolName);
else
@ -590,7 +595,7 @@ relocation_iterator RuntimeDyldMachO::processRelocationRef(
Addr = GOTEntry;
}
RelocationEntry TargetRE(SectionID, Offset,
MachO::X86_64_RELOC_UNSIGNED, Value.Addend, true,
MachO::X86_64_RELOC_UNSIGNED, Addend, true,
2);
resolveRelocation(TargetRE, (uint64_t)Addr);
} else if (Arch == Triple::arm && (RelType & 0xf) == MachO::ARM_RELOC_BR24) {

BIN
test/ExecutionEngine/RuntimeDyld/Inputs/x86_64_macho_pic_globals_GOT.o Normal file
View File

Binary file not shown.

1
test/ExecutionEngine/RuntimeDyld/arm_secdiff_reloc.test → test/ExecutionEngine/RuntimeDyld/macho_relocations.test
View File

@ -1 +1,2 @@
RUN: llvm-rtdyld -printline %p/Inputs/arm_secdiff_reloc.o
RUN: llvm-rtdyld %p/Inputs/x86_64_macho_pic_globals_GOT.o