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[RuntimeDyld][MachO][AArch64] Add assertion to check for duplicate addend definition.

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In MachO for AArch64 it is possible to have an explicit addend defined by
the ARM64_RELOC_ADDEND relocation or having an addend encoded within the
instruction. Only one of them are allowed per relocation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213687 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Juergen Ributzka 2014-07-22 21:42:49 +00:00
parent 5b50a3c769
commit 214c554b64
1 changed files with 4 additions and 4 deletions
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8
lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldMachOAArch64.h
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@ -41,16 +41,14 @@ public:
// addend for the following relocation. If found: (1) store the associated
// addend, (2) consume the next relocation, and (3) use the stored addend to
// override the addend.
bool HasExplicitAddend = false;
int64_t ExplicitAddend = 0;
if (Obj.getAnyRelocationType(RelInfo) == MachO::ARM64_RELOC_ADDEND) {
assert(!Obj.getPlainRelocationExternal(RelInfo));
assert(!Obj.getAnyRelocationPCRel(RelInfo));
assert(Obj.getAnyRelocationLength(RelInfo) == 2);
HasExplicitAddend = true;
int64_t RawAddend = Obj.getPlainRelocationSymbolNum(RelInfo);
// Sign-extend the 24-bit to 64-bit.
ExplicitAddend = (RawAddend << 40) >> 40;
ExplicitAddend = SignExtend64(RawAddend, 24);
++RelI;
RelInfo = Obj.getRelocation(RelI->getRawDataRefImpl());
}
@ -59,7 +57,9 @@ public:
RelocationValueRef Value(
getRelocationValueRef(ObjImg, RelI, RE, ObjSectionToID, Symbols));
if (HasExplicitAddend) {
assert((ExplicitAddend == 0 || RE.Addend == 0) && "Relocation has "\
"ARM64_RELOC_ADDEND and embedded addend in the instruction.");
if (ExplicitAddend) {
RE.Addend = ExplicitAddend;
Value.Addend = ExplicitAddend;
}